User Equipment and Method with Improved Critical Communication Notification in Wireless Communication

Abstract

To improve emergency notification and high QoS priority URLLC data transmission in wireless communication.SOLUTION: User equipment for wireless communication includes a transmitter and a receiver. A first resource pool (RP) includes a first plurality of resources for transmission, and a second RP includes a second plurality of resources for transmission and its configuration is different from or equal to a first RP configuration. The transmitter sends a first critical communication notification (CCN), which is a first message indicating that a second message is to be sent using the second RP, using the first RP, and transmits the second message using the second RP after or simultaneously with transmitting the first CCN. A third RP includes a third plurality of resources for transmission and a fourth RP includes a fourth plurality of resources for transmission, the configurations of which are different or equal. The receiver receives a second CCN, which is a third message sent using the third RP and indicates that a fourth message is sent using the fourth RP. The transmitter does not transmit using the fourth RP in response to the reception of the second CCN by the receiver.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the field of wireless communication networks, and more particularly, to the concept of transmitting data in a wireless communication network. Specifically, the present invention relates to user equipment and methods in which critical communication in wireless communication is improved. Critical communication may be, for example, an emergency notification in V2X (Vehicle-to-Everything) or D2D (Device-to-Device), or may be related to other types of communication that require, for example, ultra-low latency and / or high reliability.

Background Art

[0002] In mobile communication, different entities can communicate with each other. For example, some of the possible communications between different entities can be classified into V2X communications, such as V2V (Vehicle-to-Vehicle) communications, and D2D communications. In V2X, data signaling and control signaling are always multiplexed either in frequency or in time. Data and control may be transmitted within the same subframe, or may be transmitted within different / subsequent subframes.

[0003] Generally, communication is performed, for example, from a user equipment (UE = User Equipment / User Entity) to a base station using an uplink, or, for example, from a base station to a user equipment using a downlink. The base station may be, for example, any type of NodeB, such as an eNB (evolved NodeB). Sidelink transmission, for example, transmission between two user equipments without a link to a base station, is a relatively new concept that is becoming increasingly important.

[0004] Details regarding V2X, V2V, D2D (device-to-device), and sidelink can be found, for example, in [1], [3], [4]. Information regarding grant-free transmission within sidelink (transmission modes 2 and 4, D2D), i.e., pre-configured resources, can be found, for example, in [2] and [5]. According to [1], the UE should arbitrarily select a cyclic shift n among {0, 3, 6, 9} in each physical sidelink control channel (PSCCH) transmission. cs,λ should be selected arbitrarily.

[0005] The current V2X specifications of 3GPP (3rd Generation Partnership Project) in Long-Term Evolution (LTE) support two modes, namely, mode 3 and mode 4. In New Radio (NR) 5th Generation (5G), those modes are mainly centralized resource allocation (such as mode 3) and autonomous resource allocation (such as mode 4).

[0006] In mode 3, resource provisioning is performed via the base station. The user equipment (UE) is connected to the base station, and the base station supports V2X operation and obtains its resources from the base station.

[0007] Mode 4 is an autonomous mode that employs distributed scheduling. The UE is required to independently detect suitable resources. Currently, in mode 4, a one-second sensing operation is required prior to using any resource for transmission.

[0008] The concept of an emergency pool includes a special resource pool, a special resource configuration, a special resource pool configuration, and a very limited purpose, such as the existence of a special (common) bandwidth part (BWP) that can be used during handover / radio link failure (RLF) by a UE without dedicated resource permission for transmission. These configured / pre-configured resources are, in this context, called a shared resource pool or a shared / common configured permission or a common bandwidth part (BWP), that is, they may be a legacy exceptional pool for V2X, the full bandwidth, a sub-bandwidth, or an ordinary shared pool or configured permission within the bandwidth part (BWP).

[0009] In V2X, a shared resource pool, a common configured resource, or a common BWP for sidelink (SL) communication is mainly defined to carry communication in exceptional situations whenever the resources cannot be configured / pre-configured (e.g., during radio link failure, during the switch from connected to idle of the user equipment, when the sensing results are not available, or during handover). This is valid for both scheduling modes, i.e., network-controlled permission-based resource selection in mode 3 and autonomous resource selection in mode 4. In LTE (Long Term Evolution) release 15, access to the exceptional resource pool (shared resource pool or shared / common configured permission or common bandwidth part (BWP)) is possible only using an arbitrary selection of resources.

[0010] Therefore, the main purpose of this exceptional pool (shared resource pool or shared / common configured permission or common bandwidth part (BWP)) is to be accessed simply briefly or instantaneously during exceptional situations in order to avoid any congestion to the exceptional pool. To enable the release of resources to other UEs and avoid a higher collision probability, exceptional Transmission of large-scale PDCP (Packet Data Convergence Protocol) PDUs (Protocol Data Units) via side links within a pool is not supported.

[0011] For example, an exceptional pool is a resource pool with multiple transmission resources that is a shared resource pool or a shared / common configured permission or common bandwidth part (BWP), and is also a legacy exceptional pool.

[0012] [6] describes critical mission and emergency notifications (which may be, for example, ultra-reliable low-latency communication (URLLC) packets with high service quality (QoS) flows and requirements) that require simultaneous unlicensed transmission for V2X.

[0013] Low latency and high reliability are essential to ensure successful emergency notifications (Emergency Notification = EN) for V2X.

[0014] Therefore, it would be very helpful if an improved concept for emergency notifications could be provided.

Summary of the Invention

Problems to be Solved by the Invention

[0015] The object of the present invention is to provide an improved concept for emergency notifications and high QoS priority URLLC data transmission in wireless communication. The object of the present invention is solved by a user equipment according to claim 1, by a system according to claim 23, by a method according to claim 24, and by a computer program according to claim 25.

Means for Solving the Problems

[0016] A user equipment for wireless communication is provided. The user equipment includes a transmitter and a receiver. A first resource pool defined by a first resource pool configuration includes a first plurality of resources for transmission. A second resource pool defined by a second resource pool configuration includes a second plurality of resources for transmission. The second resource pool configuration is different from or equal to the first resource pool configuration. The transmitter is configured to transmit a first critical communication notification, which is a first message, within the first resource pool, and the first critical communication notification indicates that a second message is to be transmitted within the second resource pool. Moreover, the transmitter is configured to transmit the second message within the second resource pool after transmitting the first critical communication notification or simultaneously with transmitting the first critical communication notification. A third resource pool defined by a third resource pool configuration includes a third plurality of resources for transmission. A fourth resource pool defined by a fourth resource pool configuration includes a fourth plurality of resources for transmission. The fourth resource pool configuration is different from or equal to the third resource pool configuration. The receiver is configured to receive a second critical communication notification, which is a third message, transmitted within the third resource pool, and the second critical communication notification indicates that a fourth message is to be transmitted within the fourth resource pool. The transmitter is configured not to transmit anything within the fourth resource pool in response to the receiver receiving the second critical communication notification.

[0017] Furthermore, a method for wireless communication is provided. A first resource pool comprises a first plurality of resources for transmission. A second resource pool comprises a second plurality of resources for transmission. The second resource pool configuration is different from or equal to the first resource pool configuration. A third resource pool comprises a third plurality of resources for transmission. A fourth resource pool comprises a fourth plurality of resources for transmission. The fourth resource pool configuration is different from or equal to the third resource pool configuration. The method comprises: transmitting, by a transmitter of a user equipment, a first critical communication notification, which is a first message, within the first resource pool, wherein the first critical communication notification indicates that a second message is to be transmitted within the second resource pool; transmitting, by the transmitter, the second message within the second resource pool after or simultaneously with transmitting the first critical communication notification; receiving, by a receiver of the user equipment, a second critical communication notification, which is a third message, within the third resource pool, wherein the second critical communication notification is transmitted within the third resource pool by the receiver of the user equipment and the second critical communication notification indicates that a fourth message is to be transmitted within the fourth resource pool; in response to receiving the second critical communication notification by the receiver, not transmitting anything within the fourth resource pool by the transmitter and.

[0018] Furthermore, a computer program for implementing the above method is provided, which when executed on a computer or a signal processor

[0019] Embodiments are based on a new concept for ultra-low latency and high-reliability access, suitable for direct D2D communication. The new concept is applied, for example, also partially to critical communication notifications within the uplink. ​

[0020] The new concept includes, for example, the simultaneous unlicensed EN transmission using specific signal characteristics, such as an increased power setting. A unique signal indicating an emergency situation can be transmitted, for example. The critical communication notification can be transmitted, for example, within a frequency / time domain not used within the currently defined frame structure. Retransmission can be defined, for example, to ensure the required reliability or QoS (Quality of Service). Upon receiving the EN, nearby UEs can be configured to stop transmitting within a continuous D2D pool, for example, to avoid interference with the retransmitted EN. UEs that do not receive the EN by simultaneous transmission are informed to avoid the interference repeated within a subsequent TTI (TTI = Transmission Time Interval), also called a subframe (SF), using, for example, a randomized time-frequency resource while the EN is being sent. For example, relay of the critical communication notification can be employed to inform more remote UEs.

[0021] According to an embodiment, instant resource pool access is provided to announce emergency transmission or high-priority data transmission in parallel or in a deferred time slot. For example, if a UE supports multiple component carriers, for example, simultaneous announcement transmission and data transmission may be possible.

[0022] In an embodiment, the announcement regarding the exceptional pool can provide an indication (for example, one or more pointers, one or more offsets) to the resources used for the payload transmission. This information can include, for example, the identified resource pool of the pool used for subframe indication and / or frequency indication and / or data transmission and / or component carrier identification.

[0023] A resource pool can be defined exceptionally, for example, for mission-critical communication. This resource pool can be sent through an exceptional resource pool with, for example, pre-configured permissions of new radio resources or new radio resources allocated by configured permissions. Or, legacy LTE transmissions or LTE bands can be used, for example, to send one or more short control messages and / or one or more short data packets. In LTE, the LTE Uu interface can be responsible for this configuration. When the resource pool (or this exceptional resource) is configured by NR, this resource pool can use the NR Uu interface. (The Uu interface is the radio interface between the base station and the user equipment.)

[0024] According to an embodiment, a resource can be freed, for example, as indicated within an exceptional pool. In that case, even if resources reserved for high-priority data within the exceptional pool have already been scheduled / sensed as being free prior to receiving an indication within the exceptional pool, none of those resources can be used by any other UE anymore.

[0025] In an embodiment, when the base station manages resource allocation (e.g., in mode 3), a user entity (UE) / user equipment (UE) requesting high-priority data transmission can provide transmission, for example, on an exceptional pool (with limited resources for either control or data, or both), for example, on a normal pool, or, for example, either (transmission on both the exceptional pool and the normal pool).

[0026] For example, the exceptional pool is a resource pool with a plurality of resources for transmission.

[0027] For example, a normal pool is another resource pool with a plurality of other resources for transmission.

[0028] According to an embodiment, when a UE manages a resource allocation (e.g., in mode 4) that requests high-priority data transmission, the UE may transmit on an exceptional pool (e.g., with limited resources for either or both control or data), or may transmit on a normal pool or both (transmission on an exceptional pool and a normal pool).

[0029] In an embodiment, a high-priority / critical communication notification may be derived from, for example, PPP (ProSe packet unit priority), or packet delay budget, for example, from PPPR (ProSe packet unit reliability), or, for example, from packet error rate, for example, from any combination of the previous metrics or different QoS flow indications.

[0030] Embodiments ensure reliable and low-latency communication for the transmission of emergency / high-priority messages.

[0031] Embodiments are based on an instantaneous ultra-short-term notification that includes an indication of which resources should be kept clear of any other UEs, even if already allocated / scheduled. These resources kept in a clear state can be reserved, for example, for the transmission of emergency / high-priority messages.

[0032] In an embodiment, a UE that receives the notification may be configured to interrupt its active transmissions or defer its scheduled resources, for example, if those UEs successfully decrypt the notification.

[0033] All UEs belonging to LTE / 5G / NR (NR = New Radio) are assumed to be able to decrypt the repetition on the exceptional pool / exceptionally pre-configured resources and the normal pool.

[0034] According to an embodiment, for high-priority notifications, latency is reduced and reliability is increased.

[0035] Regarding latency, by adopting "Critical" resource reservation, a long sensing period is avoided. The UE may be enabled to access resources in a resource pool / resource pool configuration (other than emergency / exceptional resources / pools) without 1-second sensing as required in the current specification, for example.

[0036] Regarding reliability, a UE with a low-priority payload may, for example, be prohibited from transmitting even already scheduled transmissions in order to prioritize high-priority data, which avoids interference and thus provides higher reliability for high-priority data transmission.

[0037]

[0038] For example, priority / critical communication is derived using one of the following indicators or a combination of two or more of the following indicators: - PPPP (ProSe packet unit priority) - PPPR (ProSe packet unit reliability) - Packet delay budget - Packet error rate - QoS flow - Any combination from the previous metrics.

[0039] Some embodiments may implement multiplexing of data and control on an exceptional pool (or any emergency / exceptional pool) indicating, for example, additional transmission resource periods, frequencies, and times.

[0040] Some embodiments may implement multiplexing of data and control within an exceptional pool and redundancy in autonomous mode, for example.

[0041] Some embodiments may notify (in a notification), for example, on an ultra-short term basis, other UEs sharing resources on a resource pool to keep their resources clear so that, for example, other UEs can be prevented from using the indicated resources, and thus, for example, any high priority / emergency message can be transmitted without permission with high reliability (e.g., with ultra-low latency).

[0042] Some embodiments may extend the use of an exceptional / emergency pool, for example, to enable low latency communication.

[0043] In some embodiments, when data is transmitted via an exceptional / emergency pool, the subchannel size and / or subchannel offset and / or SPS period (SPS = semi-persistent scheduling) can be transmitted, for example, by SCI (sidelink control information), and / or a preconfigured period can be transmitted, for example, by SCI (sidelink control information).

[0044] Some embodiments can transmit without sensing using variable power until a certain time (e.g., until a certain time T_max_P), for example, by transmission on an exceptional pool and (e.g., simultaneously) by parallel transmission on a normal pool.

[0045] Embodiments can be employed, for example, in the fields of V2X, D2D, mMTC (massive machine type communication), URLLC, and also in delay-critical / reliability-critical communications.

[0046] In an embodiment, when a vehicle has an emergency request and the vehicle is within the coverage of a base station in that case, the subframe bitmap received by that vehicle from that base station is transmitted (forwarded) from that vehicle to another vehicle outside the coverage of that base station.

[0047] Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.

Brief Description of the Drawings

[0048]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11a

Figure 11b

Figure 12

Figure 13

Best Mode for Carrying Out the Invention

[0049] In the following description, numerous specific details are set forth in order to provide a more thorough description of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention. Additionally, unless otherwise specified, the features of the different embodiments described below may be combined with each other.

[0050] Before describing embodiments of the present invention in detail, the concepts underlying embodiments of the present invention will be described.

[0051] FIG. 2 is a schematic diagram of an example of a wireless network 100 including a core network 102 and a radio access network 104. The radio access network 104 may include a plurality of base stations eNB1 to eNB5, and each of these base stations serves a specific area surrounding the base station schematically represented by its respective cell 1061 to 1065. The base stations are provided to serve users within the cell. The users may be fixed devices or mobile devices. Further, the wireless communication system connects to the base stations or to the users. It can be accessed by mobile or fixed IoT devices (IoT = Internet of Things). Mobile devices or IoT devices may include physical devices, ground vehicles such as robots or cars, aircraft such as manned or unmanned aerial vehicles (UAVs), the latter of which may also be referred to as other articles that embed electronic devices, software, sensors, actuators, etc., as well as network connectivity that enables these devices to collect and exchange data across an existing network infrastructure. Figure 2 shows an exemplary diagram of only 5 cells, but the wireless communication system may include more such cells. Figure 2 shows two user UEs, UE1 and UE2, also called user equipment, which are within cell 1062 and served by base station eNB2. Another user UE3 is shown within cell 1064 served by base station eNB4. Arrows 1081, 1082, and 1083 schematically represent uplink / downlink connections for transmitting data from user UEs UE1, UE2, and UE3 to base stations eNB2, eNB4 or from base stations eNB2, eNB4 to user UEs UE1, UE2, UE3. Further, Figure 2 shows two IoT devices 1101 and 1102 within cell 1064, which may be fixed devices or mobile devices. IoT device 1101 accesses the wireless communication system via base station eNB4 and receives and transmits data as schematically represented by arrow 1121. IoT device 1102 accesses the wireless communication system via user UE3 as schematically represented by arrow 1122. Each base station eNB1 to eNB5 may be connected to core network 102 via respective backhaul links 1141 to 1145, schematically represented in Figure 2 by arrows pointing to the "core" via, for example, the S1 interface. Core network 102 may be connected to one or more external networks.Furthermore, some or all of each of the base stations eNB1 to eNB5 can be connected to each other via respective backhaul links 1161 to 1165, which are schematically represented in FIG. 2 by arrows pointing to "enB", for example, via an X1 interface or an X2 interface.

[0052] The wireless network or wireless communication system shown in FIG. 2 can be a heterogeneous network having two separate overlay networks, a network of macro cells each including macro base stations such as base stations eNB1 to eNB5, and a network of small cell base stations (not shown in FIG. 2) such as femto base stations or pico base stations.

[0053] There are a plurality of resources for transmission. In the case of data transmission, a physical resource grid can be used. The physical resource grid may comprise a set of resource elements to which various physical channels and physical signals are mapped. For example, the physical channels may include a physical downlink shared channel and an uplink shared channel (PDSCH, PUSCH) that carry user-specific data, also referred to as downlink payload data and uplink payload data, a physical broadcast channel (PBCH) that carries, for example, a master information block (MIB) and a system information block (SIB), a physical downlink control channel and an uplink control channel (PDCCH, PUCCH) that carry, for example, downlink control information (DCI), etc. In the case of the uplink, the physical channels may further include a physical random access channel (PRACH or RACH) used by the UE to access the network when the UE synchronizes and acquires the MIB and SIB. The physical signals may include a reference signal (RS), a synchronization signal, etc. The resource grid may include a frame having a certain duration, such as 10 milliseconds, in the time domain and a given bandwidth in the frequency domain. The frame may have a fixed number of subframes of a predefined length, for example, 2 subframes of length 1 millisecond. Each subframe may include 2 slots of 6 or 7 OFDM symbols depending on the cyclic prefix (CP) length.

[0054] In the case of sidelink communication (after successful association with a base station, for example, within a dedicated band, for example, for an RRC-connected UE, or for an idle UE or a remote UE), there is a physical sidelink shared channel (PSSCH) for data. In addition, control for the sidelink requires a physical sidelink control channel (PSCCH).

[0055] Both channels, namely, PSSCH and PSCCH, are transmitted between UEs via the time / frequency resource grid. In the case of sidelink transmission, the resource pool / preconfigured resources may be on a dedicated carrier or, in the case of LTE and NR, may be together with the uplink channel within the band.

[0056] The wireless communication system may be an orthogonal frequency division multiplexing (OFDM) system, an orthogonal frequency division multiple access (OFDMA) system, or any other IFFT-based signal with or without a CP, for example, any single-tone or multi-carrier system using frequency division multiplexing such as DFT-s-OFDM. Other waveforms may be used, such as non-orthogonal waveforms for multiple access, for example, filter bank multi-carrier (FBMC), generalized frequency division multiplexing (GFDM), or universal filtered multi-carrier (UFMC). The wireless communication system may operate according to, for example, the LTE Advanced Pro standard, or the 5G standard, or the NR (New Radio) standard. In LTE, sidelink communication uses the DFT-s-OFDM waveform, and in NR, sidelink may use both waveforms, namely, DFT-s-OFDM and / or OFDMA.

[0057] In the wireless communication network shown in FIG. 2, the radio access network 104 may be a heterogeneous network that includes a network of primary cells, each of which includes a primary base station, also referred to as a macro base station. Further, a plurality of secondary base stations, also referred to as small cell base stations, may be provided to each of the macro cells. FIG. 3 is a schematic diagram of a cell, such as cell 1061 of FIG. 2, having two separate overlay networks, and the network includes a macro cell network including macro cell 1061 and a small cell network. Note that FIG. 3 depicts only a single macro cell, but one or more of the other cells in FIG. 2 may use an overlay network. The small cell network includes a plurality of small cell base stations SeNB1 to SeNB5 that each operate within a respective area 1201 to 1205, also referred to as the coverage area of the small cell. The small cell base stations SeNB1 to SeNB5 may be controlled by a macro cell base station MeNB1 to which the respective small cell base stations SeNB1 to SeNB5 are connected via respective backhaul links 1221 to 1225. Instead of connecting the small cell base stations to the macro cell base station via the backhaul link, one or more of the small cell base stations may be coupled to the core network via respective backhaul links. FIG. 3 further shows that a user equipment UE is served by the macro cell base station MeNB1 as shown by arrow 1241 and by the small cell base station SeNB1 as schematically shown by arrow 1242.

[0058] Figure 4 is a further schematic view of a plurality of small cells 1201 to 1203 of a macro cell (not shown). The macro cell may be the same as the macro cell in FIG. 3. Each small cell may serve one or more UEs. Each small cell base station SeNB1, SeNB2, SeNB3,... other than the small cell base station in FIG. 3 is connected to the core network 102 via a backhaul link or connection 1021 to 1023. Each of the small cells 1021 to 1023 may be directly connected to each other via an X2 interface, as schematically shown in FIG. 4. The transport network connecting each small cell to the core network 102 may be an optical fiber network including one or more points of presence (PoP) where a plurality of small cells are connected to the transport network. Further details regarding the backhaul architecture as shown in FIG. 4 are described in reference [7].

[0059] A small cell, also called a secondary mobile communication cell (SC), forms an overlay network with respect to the network of a primary mobile communication cell (PC), also called a macro cell. The small cell may be connected to the macro cell (FIG. 3) and / or to the core network (FIG. 4) via a backhaul link (BL). The backhaul link may be a wired link or a wireless link. When connecting the small cell to the core network via the backhaul link, the point of presence (PoP) of the transport network (FIG. 4) may serve as an interface to the core network. Each small cell may serve some mobile user UEs within its coverage area via a wireless access link (AL) 1242. Further, the UE may be connected to the primary cell, for example, to receive control signals, and this connection may sometimes be called a control link (CL).

[0060] Hereinafter, embodiments of the present invention will be described.

[0061] ​Figure 1 shows a user equipment for wireless communication according to an embodiment.

[0062] The user equipment includes a transmitter 152 and a receiver 154.

[0063] The user equipment has specific functions:

[0064] In the first scenario, the user equipment notifies critical communication using a first message. A second message follows the critical communication. In such a scenario:

[0065] A first resource pool defined by a first resource pool configuration includes a first plurality of resources for transmission. A second resource pool defined by a second resource pool configuration includes a second plurality of resources for transmission. The second resource pool configuration is different from or equal to the first resource pool configuration.

[0066] The transmitter 152 is configured to transmit a first critical communication notification, which is the first message, within the first resource pool, and the first critical communication notification indicates that a second message is to be transmitted within the second resource pool.

[0067] Examples of the first message are message 651 in FIG. 6, message 751 in FIG. 7, messages 851 and 853 in FIG. 8, messages 951, 953, and 955 in FIG. 9, messages 1051 and 1054 in FIG. 10, messages 1151 and 1154 in FIG. 11a, and messages 1156 and 1157 in FIG. 11b.

[0068] Examples of the second message are message 661 in FIG. 6, message 761 in FIG. 7, messages 861, 862, 863, 864, and 865 in FIG. 8, messages 961, 962, 963, 964, and 965 in FIG. 9, messages 1061, 1062, 1063, and 1064 in FIG. 10, messages 1161, 1162, 1163, 1164 in FIG. 11a, and messages 1166 and 1167 in FIG. 11b.

[0069] The resource pool configuration may be, for example, a configured permission.

[0070] The first resource pool and / or the second resource pool and / or the third resource pool and / or the fourth resource pool may be configured, for example, across the entire bandwidth, within a sub-band, or within a bandwidth part (BWP).

[0071] Furthermore, after transmitting the first critical communication notification or simultaneously with transmitting the first critical communication notification, the transmitter 152 is configured to transmit the second message within the second resource pool.

[0072] In a second scenario, the user equipment receives a notification of critical communication from another communication entity within the third resource pool, and the notification secures a fourth resource pool for critical communication. The user equipment adapts its behavior and does not transmit its own message within the fourth resource pool (secured) secured by the notification of critical communication. Critical communication from that other communication entity itself then follows. In such a scenario: The third resource pool defined by the third resource pool configuration comprises a third plurality of resources for transmission. The fourth resource pool defined by the fourth resource pool configuration comprises a fourth plurality of resources for transmission. The fourth resource pool configuration is different from or equal to the third resource pool configuration.

[0073] The third resource pool defined by the third resource pool configuration comprises a third plurality of resources for transmission. The fourth resource pool defined by the fourth resource pool configuration comprises a fourth plurality of resources for transmission. The fourth resource pool configuration is different from or equal to the third resource pool configuration.

[0074] The receiver 154 is configured to receive a second critical communication notification that is a third message, the second critical communication notification is transmitted within a third resource pool, and the second critical communication notification indicates that a fourth message is transmitted within a fourth resource pool.

[0075] The transmitter 152 is configured to not transmit anything within the fourth resource pool in response to the receiver 154 receiving the second critical communication notification.

[0076] Similarly for the first message, examples of the third message are message 651 in FIG. 6, message 751 in FIG. 7, messages 851 and 853 in FIG. 8, messages 951, 953, and 955 in FIG. 9, messages 1051 and 1054 in FIG. 10, messages 1151 and 1154 in FIG. 11a, and messages 1156 and 1157 in FIG. 11b.

[0077] Similarly for the fourth message, examples of the second message are message 661 in FIG. 6, message 761 in FIG. 7, messages 861, 862, 863, 864, and 865 in FIG. 8, messages 961, 962, 963, 964, and 965 in FIG. 9, messages 1061, 1062, 1063, and 1064 in FIG. 10, messages 1161, 1162, 1163, 1164 in FIG. 11a, and messages 1166 and 1167 in FIG. 11b.

[0078] According to one embodiment, for example, the third message includes a pointer to a message within another resource pool that defines a frequency location and a time location for one-shot transmission. Or, the third message also defines a frequency location, a time location, and a repetition period for a repeated message. This notification may include a pointer to a message, control information, and / or data transmission.

[0079] For example, according to one embodiment, the first message includes a pointer to a second message in a second resource pool that defines one or more frequency locations and time locations of the second message. Or, the first message includes a pointer to a second message in a second resource pool that defines one or more frequency locations and time locations, as well as a repetition period, of the second message.

[0080] And / or, the third message includes a pointer to a fourth message in a fourth resource pool that defines one or more frequency locations and time locations of the fourth message. Or, the third message includes a pointer to a fourth message in a fourth resource pool that defines one or more frequency locations and time locations, as well as a repetition period, of the fourth message.

[0081] According to one embodiment, the first resource pool can be defined, for example, as a shared resource pool, or a common configured permission, or a commonly accessed bandwidth part, or an exceptionally configured pool. And / or, the third resource pool can be defined, for example, as a shared resource pool, or a common configured permission, or a commonly accessed bandwidth part, or an exceptionally configured pool. In one embodiment, the second resource pool can be defined, for example, as a communication resource pool, or a preconfigured communication resource, or an allocated bandwidth part, or a dynamically permitted resource. And / or, the fourth resource pool is defined as a communication resource pool, or a preconfigured communication resource, or an allocated bandwidth part, or a dynamically permitted resource.

[0082]

[0083] ​In one embodiment, the first resource pool may comprise, for example, a first plurality of preconfigured resources for sidelink transmission, the second resource pool may comprise, for example, a second plurality of resources for sidelink transmission, the third resource pool may comprise, for example, a third plurality of resources for sidelink transmission, and the fourth resource pool may comprise, for example, a fourth plurality of resources for sidelink transmission.

[0084] According to one embodiment, the transmitter 152 may be configured to transmit a first critical communication notification within the first resource pool, for example, within a first time slot. In such an embodiment, the transmitter 152 may be configurable to transmit a second message within the second resource pool, for example, after transmitting the first critical communication notification within a second time slot, where the second time slot is a time slot delayed with respect to the first time slot.

[0085] In one embodiment, the transmitter 152 may be configured to transmit a second message within the second resource pool, for example, in the same time slot when the first critical communication notification is transmitted or in a subsequent time slot after the first critical communication notification is transmitted.

[0086] According to one embodiment, the transmitter 152 may be configured to transmit a first critical communication notification including an indication of a transmission resource among the second plurality of transmission resources of the second resource pool. In such an embodiment, the transmitter 152 may be configurable to transmit a second message within the transmission resource indicated by the indication, where the indication includes a pointer to the transmission resource, or includes a subframe indication indicating a subframe, or includes a frequency indication indicating a frequency, or includes a component carrier indication indicating a component carrier.

[0087] In one embodiment, the transmitter 152 may be configured to stop transmitting a fifth message within a fourth resource pool, for example, in response to receiving a second critical communication notification by the receiver 154.

[0088] According to one embodiment, the fifth message may be scheduled to be transmitted within a fourth resource pool, for example. In such an embodiment, the transmitter 152 may be configured to not transmit the fifth message within the fourth resource pool, for example, in response to receiving a second critical communication notification by the receiver 154.

[0089] In one embodiment, the first resource pool may be an exceptional pool, for example, a shared pool or a configured permission within all bandwidth, sub - bandwidth, or bandwidth portions for providing a first plurality of resources for transmission having high priority. The second resource pool may be a normal pool, for example, for providing a second plurality of resources for transmission having a priority lower than high priority. The transmitter 152 may be configured to transmit a second message having high priority within an exceptional pool, for example, a shared pool or a configured permission within all bandwidth, sub - bandwidth, or bandwidth portions. The transmitter 152 may be configured to transmit a sixth message having low priority within a normal pool, for example.

[0090] According to one embodiment, the third resource pool may be an exceptional pool, for example, for providing a third plurality of resources for transmission having high priority. In such an embodiment, the fourth resource pool may be a normal pool, for example, for providing a fourth plurality of resources for transmission having a priority lower than high priority. Moreover, in such an embodiment, the transmitter 152 may be configured to transmit a second message having high priority within the exceptional pool, for example. Moreover, in such an embodiment, the transmitter 152 may be configured to transmit a sixth message having low priority within the normal pool, for example.

[0091] In one embodiment, the transmitter 152 may be configured to transmit a first critical communication notification within a first resource pool without sensing, for example, whether the first resource pool is occupied by another transmission.

[0092] According to one embodiment, after transmitting the first critical communication notification for the first time, the transmitter 152 may be configured to retransmit the first critical communication notification within the first resource pool one or more additional times, for example.

[0093] In one embodiment, in response to the receiver 154 receiving a second critical communication notification, the transmitter 152 may be configured to send, for example, a third message to one or more other user equipment (not shown in FIG. 1), where the third message may indicate, for example, that a fourth message is to be transmitted within a fourth resource pool.

[0094] According to one embodiment, the transmitter 152 may be configured to transmit a first critical communication notification using, for example, a first transmission power, and the transmitter 152 may be configured to transmit a second message using, for example, a second transmission power, where the first transmission power may be greater than the second transmission power, for example.

[0095] In one embodiment, at least one of the first critical communication notification and the second critical communication notification may be, for example, sidelink control information including one or more sidelink control information data elements, where the sidelink control information data elements include at least one of a component carrier index, a subframe index, an SPS period, an offset for transmission, a subchannel size, and an indication indicating whether frequency hopping is enabled.

[0096] According to one embodiment, the first resource pool, the second resource pool, the third resource pool, and the fourth resource pool may each be assigned to, for example, a plurality of component carriers. The first resource pool may be assigned to, for example, a first component carrier among the plurality of component carriers. The second resource pool may be assigned to, for example, a second component carrier among the plurality of component carriers. The second component carrier may be different from, for example, the first component carrier.

[0097] In another embodiment, the first resource pool, the second resource pool, the third resource pool, and the fourth resource pool may each be assigned to, for example, a plurality of component carriers. The first resource pool may be assigned to, for example, a first component carrier among the plurality of component carriers. The second resource pool may also be assigned to, for example, the first component carrier.

[0098] According to one embodiment, the user equipment is configured to be installed in a vehicle. When the user equipment in the vehicle has an emergency request and the vehicle is within the coverage of a base station, the receiver 154 of the user equipment is configured to receive a subframe bitmap from the base station, and the transmitter 152 of the user equipment is configured to transmit the subframe bitmap received from the base station to another vehicle outside the coverage of the base station.

[0099] According to one embodiment, the first resource pool is located on the same component carrier as the second resource pool, or the third resource pool is located on the same component carrier as the fourth resource pool.

[0100] In another embodiment, the first resource pool is not located on the same component carrier as the second resource pool, or the third resource pool is not located on the same component carrier as the fourth resource pool.

[0101] FIG. 13 shows a system for wireless communication according to one embodiment.

[0102] The system includes a plurality of user equipments 150, 250, and each of the plurality of user equipments 150, 250 is a user equipment according to one of the above-described embodiments. The plurality of user equipments 150, 250 includes a first user equipment 150 and a second user equipment 250.

[0103] The first resource pool includes a first plurality of resources for transmission, defined by a first resource pool configuration. The second resource pool includes a second plurality of resources for transmission, defined by a second pre-configuration. The second resource pool configuration is different from or equal to the first resource pool configuration.

[0104] The transmitter 152 of the first user equipment 150 is configured to transmit a critical communication notification, which is a first message, within the first resource pool, and the critical communication notification indicates that a second message is transmitted within the second resource pool.

[0105] The receiver 254 of the second user equipment 250 is configured to receive the critical communication notification from the transmitter 152 of the first user equipment 150.

[0106] The transmitter 252 of the second user equipment 250 is configured not to transmit anything within the second resource pool in response to the reception of the critical communication notification by the receiver 254 of the second user equipment 250.

[0107] After transmitting or simultaneously with transmitting a critical communication notification, the transmitter 152 of the first user equipment 150 is configured to transmit a second message within a second resource pool.

[0108] Hereinafter, specific embodiments of the present invention will be described in detail.

[0109] First, a control channel design according to an embodiment and a securing procedure for exceptional pool notification of data in a normal pool will be described.

[0110] In an embodiment, control data in an exceptional pool may be employed to process and secure transmissions, retransmissions, or periodic repetitions within a normal resource pool.

[0111] The concepts provided are comparable to interrupt processing in computer science to some extent while distinguishing between a first-level interrupt handler and a second-level interrupt handler.

[0112] When an emergency event occurs, the first-level part corresponds to sidelink control information (SCI) that is immediately transmitted via a preconfigured exceptional pool. The SCI includes information regarding a component carrier, subframes and / or subchannel locations for transmitting notification data, and, optionally, the repetition period / pattern of data transmission in a semi-persistent scheduling (SPS) manner.

[0113] The second-level part consists of scheduled data transmissions via a normal resource pool. The scheduled data transmission may consist of, for example, a single transmission.

[0114] Or, the scheduled data transmission may include an initial transmission and subsequent retransmissions, for example, according to a predefined pattern. For example, the initial transmission may be followed by periodic transmissions, for example. The first-level transmission has a transmission interval t, for example.interval and can carry information regarding the length T of each transmission, where T can be defined, for example, as T = N * ST_duration.

[0115] In the current 3GPP specifications, all UEs are obliged to receive any data transmission within an exceptional pool.

[0116] According to an embodiment, all UEs can mute or omit their intended transmission, for example, if the UE would collide with a (delayed / scheduled) data transmission of a second-level portion.

[0117] In an embodiment, the normal (or exceptional) pool used for data transmission opportunities after transmitting an SCI using an exceptional pool can be selected, for example, based on CBR (Channel Usage Ratio).

[0118] In an embodiment, since it can be expected that the UE is reading the SCI from the control channel of an exceptional resource pool or from a normal resource pool, the same or the next possible subframe within the normal resource pool can be selected, for example. The next possible subframe may refer to the next subframe that can be read by all UEs, considering that some UEs may have to readjust their local oscillators according to the component carrier in which the delayed data transmission is scheduled.

[0119] The SCI data element can include, for example, one or more of the following elements: - Component Carrier (CC) index; for example, the same default CC ID. If the ERP is within the same CC, the CC ID may be left in an unused state or set to zero. Otherwise, different CC IDs can have any preconfigured value. - As defined in item 3.3.1.1, IE ServCellIndex is related to the short identification information used to identify the serving cell (e.g., PCell or SCell). The value 0 is applicable to the PCell, and the previously assigned ServCellIndex is applicable to the SCell: - The ServCellIndex information element can be defined, for example, as follows: --ASN --ASN1START ServCellIndex-r10::=INTEGER(0..7) ServCellIndex-r13::=INTEGER(0..31) --ASN1STOP - The subframe index or offset for the initial data transmission after the emergency control notification (second-level (payload) transmission). - SPS period; within the normal resource pool and / or exceptional / emergency pool. A period with interval t interval is defined, with a maximum transmission period T max in the case of. - The PRB index n for the transmission within the initial second-level (data payload and control information) transmission subCHRBstat offset for the transmission (PRB = physical resource block). - The number of PRBs, for example, the subchannel size n as 2 control PRBs + X data PRBs subCHsize . - The resource indication value (RIV) indicating the start of resource allocation. - For SPS transmission, whether to apply frequency hopping using the indicated pattern. Optionally, if blind detection is not possible, the pattern ID may be present within the SCI information. - For example, the preconfigured resources (grant-free transmission) for mode 3 can be indicated using the RIV, subchannel, and transmission period / guarantee. - Whether the second-level transmission is a one-shot transmission.

[0120] When other UEs capture SCI information within an Exceptional Resource Pool (ERP), those UEs may be adjusted, for example, all to receive the notified second-level data transmission. Therefore, those UEs must stop transmitting new or old data in the buffer.

[0121] Below, Exceptional Pool (EP) access for data notification according to one embodiment is described, where control information is sent within the same pool or within the exceptional pool that notifies data within the normal pool.

[0122] When the MAC (Media Access Control) PDU is large enough, instead of transmitting the complete MAC PDU within the emergency pool, only the "pointer" to the resource carrying the MAC PDU is transmitted. The MAC PDU itself can be transmitted outside the emergency pool, for example, within the normal resource pool of the parallel sidelink, either within the same subframe (the same subframe may be related to the same time, for example) or within another consecutive subframe (at different times).

[0123] FIG. 6 shows cross-carrier scheduling via SCI transmission on an exceptional resource pool according to one embodiment. Specifically, FIG. 6 shows an exceptional pool 611 and two resource pools 621, 622. Within the exceptional pool 611, a first message 651, which is a critical communication notification, is transmitted. A second message 661, that is, the notified critical communication, is transmitted later within the normal pool 622. The resource pool 611 can be defined, for example, as a shared resource pool, or a common configured permission, or a commonly accessed bandwidth portion, or an exceptionally configured pool. The resource pools 621, 622 can be defined, for example, as resource pools for communication, or pre-configured communication resources, or allocated bandwidth portions, or dynamically permitted resources.

[0124] FIG. 7 shows intracarrier scheduling via SCI transmission on an exceptional resource pool according to one embodiment. Specifically, FIG. 7 shows an exceptional pool 711 and a resource pool 721. Within the exceptional pool 711, a first message 751, which is a critical communication notification, is transmitted. A second message 761, i.e., the notified critical communication, is later transmitted within the normal pool 721. The resource pool 711 can be defined, for example, as a shared resource pool, or a common configured permission, or a commonly accessed bandwidth portion, or an exceptionally configured pool. The resource pool 721 can be defined, for example, as a resource pool for communication, or a preconfigured communication resource, or an allocated bandwidth portion, or a dynamically permitted resource. portion, or a dynamically permitted resource.

[0125] Note that the resource pools shown in FIGS. 6 and 7 are highly abstracted. For example, the resource pool does not necessarily include consecutive subframes or adjacent control channels and data channels.

[0126] In [6], when the receiving UE detects a possible collision between its own transmission and the received notified data transmission based on the SCI received via the exceptional pool, the receiving UE will omit / mute the transmission.

[0127] According to one embodiment, the SCI (or any other information data for muting other UEs) may be transmitted on the control channel of a "normal" resource pool or any conceivable further exceptional resource pool or new resource pool. The original transmission may be followed, for example, by one or more retransmissions. Such retransmissions enhance robustness.

[0128] The following describes an embodiment that ensures that control information can be realized as a one-shot transmission or as multiple transmissions, sometimes using a repetition period within a normal pool and / or an exceptional pool.

[0129] In some embodiments, for example, it may be advantageous to select the smallest possible subchannel size sizeSubchannel so as to conform to the minimum payload size per transmission / subchannel, in order to avoid collisions with other UEs as much as possible (see [2], where currently >=5 RBs are supported). The subchannel size may refer to, for example, the total number of PRBs used for data signal transmission and control signal transmission.

[0130] In some embodiments, for example, if only SCI control data is transmitted, it may be advantageous for burst transmission to use only 2 PRBs (in the frequency domain). However, the minimum allocated bandwidth, i.e., one subchannel, consists of 5 PRBs. This means that 3 RBs remain unused: according to the current specification, 5 - 2 = 3 PRBs. Those unused RBs will be located under the SCI transmission within the exceptional pool. The data PRBs may be used, for example, to carry repeated SCIs that are scrambled, for example, to enhance robustness in some cases. The data PRBs may be employed, for example, to carry information for enhancing the decoding probability of the second-level data transmission, such as (redundancy) bits / redundancy versions (RVs) taken from the output of the channel coding of the second-level transmission.

[0131] In some embodiments, alternatively or additionally, if emergency data is transmitted, the SCI may be repeated, for example, within the control channel as well.

[0132] FIG. 8 shows SPS repetition and SCI redundancy according to one embodiment. Specifically, FIG. 8 shows an exceptional pool 811 and a (normal) resource pool 821. Within the exceptional pool 811, a first message 851, which is a critical communication notification, is transmitted. The first message 851 notifies messages 861, 862, 863, 864, and 865. The notified critical messages 861, 862, 863, 864, and 865 are later transmitted within the (normal) resource pool 821. Moreover, the first message 851 is repeated as a message 853 for notifying at least the remaining critical messages 863, 864, and 865. The resource pool 811 can be defined, for example, as a shared resource pool, or a common configured permission, or a commonly accessed bandwidth portion, or an exceptionally configured pool. The resource pool 821 can be defined, for example, as a resource pool for communication, or a preconfigured communication resource , or an allocated bandwidth portion, or a dynamically permitted resource.

[0133] Three or more resources can be filled with data, for example, in a first transmission. Multiple transmissions of the PSSCH (Physical Sidelink Shared Channel) can be repeated, for example, within consecutive subframes having a repetition period T (regardless of the presence or absence of control). Some of the transmitted PSSCHs can include, for example, data (repeating the same urgent SCI as described above), and / or some of the transmitted PSSCHs can be, for example, only the urgent data PSSCH (see FIG. 8). Some of the transmitted PSSCHs can include, for example, different versions of data, the same data, or different redundancy versions of urgent data. Alternatively or additionally, either initially transmitting the UE vehicle or relaying the UE-vehicle can repeat the SCI, for example, only within an exceptional pool after a transmission period Tp3 (see FIG. 8).

[0134] Figure 9 shows SPS data under control information with repetition in an exceptional pool and a normal pool according to an embodiment. Specifically, Figure 9 shows an exceptional pool 911 and a normal resource pool 921. Within the exceptional pool 911, a first message 951 which is a critical communication notification is transmitted. The first message 951 notifies messages 961, 962, 963, and 964. The notified critical messages 961, 962, 963, and 964 are transmitted later within the (normal) resource pool 921. Moreover, the first message 951 is repeated as a message 953 for notifying at least the remaining critical messages 963 and 964. Then, within the exceptional pool 911, another message 955 which is a critical communication notification for notifying a message 965 is transmitted, and the notified message 965 is transmitted later within the normal resource pool 921. The resource pool 911 can be defined, for example, as a shared resource pool, or a common configured permission, or a commonly accessed bandwidth portion, or an exceptionally configured pool. The resource pool 921 can be defined, for example, as a resource pool for communication, or a preconfigured communication resource, or an allocated bandwidth portion, or a dynamically permitted resource.

[0135] According to an embodiment, the data PSSCH may be transmitted, for example, within an exceptional pool having a possible repetition period Tp. The SCI includes resources in both a normal pool and an exceptional pool (see Figure 9).

[0136] Hereinafter, embodiments for prioritizing the transmission of emergency data when arriving within a time window before normal data communication will be described.

[0137] The operation of emergency control and existing data transmission within a vehicle that has started an emergency according to an embodiment can be executed, for example, as follows.

[0138] If the vehicle already has a packet to be sent after a period ΔT1 and a notification triggering another emergency arrives within the minimum channel access threshold ΔT2 that allows such notification within the same vehicle, the vehicle UE must prioritize the transmission of the emergency signal and the notification (SCI via the exceptional resource pool).

[0139] The transmission of the emergency SCI (within the exceptional pool) and the associated emergency data PSSCH (regardless of the presence of a copy of the SCI) can be transmitted, for example, within the same subframe or within two consecutive subframes as previously explained. Non-critical data transmission can be muted, for example, until the emergency situation ends or is postponed to a later subframe.

[0140] In the case of the same component carrier (CC) scheduling, the emergency data and non-emergency data can coexist on different (offset) subframes with different transmission periods (if SPS transmission is configured).

[0141] Figure 10 shows the same component carrier (CC) scheduling of emergency data and normal data according to an embodiment. Specifically, Figure 10 shows an exceptional pool 1011 and a resource pool 1021. A first message 1051, which is a critical communication notification, is transmitted within the exceptional pool 1011. The first message 1051 notifies messages 1061, 1062, 1063, and 1064. The notified critical messages 1061, 1062, 1063, and 1064 are transmitted later within the (normal) resource pool 1021. Moreover, the first message 1051 is repeated as a message 1054 for notifying at least the remaining critical messages 1063 and 1064.

[0142] In some embodiments, upon receiving the first message 1051, the user equipment stops transmitting other messages 1071, 1072, and 1073 within the normal pool 1021 so that the messages 1061, 1062, 1063, and 1064 to be notified are not interrupted by the other messages 1071, 1072, and 1073.

[0143] In some embodiments, upon receiving the first message 1051, the user equipment will not transmit other messages 1071, 1072, and 1073 that were planned to be transmitted within the normal pool 1021 so that the messages 1061, 1062, 1063, and 1064 to be notified are not interrupted by the other messages 1071, 1072, and 1073 that were planned to be transmitted.

[0144] For different component carrier (CC) schedulings, the emergency data and the non-emergency data can coexist on different CCs on the same (or offset) subframe having the same transmission period or different transmission periods (if SPS transmission is configured).

[0145] Figure 11a shows different component carrier (CC) scheduling for emergency data and normal data according to one embodiment. Specifically, Figure 11a shows an exceptional pool 1111 and two resource pools 1121, 1122. Within the exceptional pool 1111, a first message 1151 which is a critical communication notification is transmitted. The first message 1151 notifies high-priority messages 1161, 1162, 1163, and 1164. The notified critical messages 1161, 1162, 1163, and 1164 are transmitted later within the (normal) resource pool 1121. Moreover, the first message 1151 is repeated as a message 1154 for notifying at least the remaining critical messages 1163 and 1164. Other messages 1171, 1172, 1173, 1174 with low priority are transmitted within another normal resource pool 1122. Other messages 1171, 1172, 1173, 1174 with low priority can be transmitted using, for example, less power than the notified critical messages 1161, 1162, 1163, and 1164 which have high priority.

[0146] The transmission of the emergency signal may be accompanied by a priority Pri1 and a transmission power Pow1, and the transmission of normal data may be accompanied by a priority Pri2 and a transmission power Pow2. Herein, Pri1 > Pri2 and Pow1 >= Pow2.

[0147] Figure 11b shows different component carrier scheduling for emergency data and normal data according to another embodiment. Within the exceptional pool 1111, a first message 1156 which is a critical communication notification is transmitted. The first message 1156 notifies a high-priority message 1166. The notified critical message 1166 is transmitted later within the exceptional resource pool 1111. Moreover, within the exceptional pool 1111, the critical communication notification Another message 1157 is sent. That another message 1157 notifies a high-priority message 1167. The notified critical message 1167 is sent later within an exceptional resource pool 1111. Other messages 1176 and 1177 with low priority are sent within a normal resource pool 1121. Other messages 1176 and 1177 with low priority can be sent, for example, using less power than the notified critical messages 1166 and 1167 with high priority.

[0148] Below, a configuration of sidelink access frequency band transmission for transmitting emergency messages to more users according to an embodiment will be described. Specifically, access to different frequency bands using different transmission powers and bandwidths will be described.

[0149] To access a channel for emergency notification, a vehicle-UE can, for example, perform a series of access / trials to capture a channel for emergency transmission to other vehicles. This should increase the opportunity to receive emergency data and control.

[0150] An emergency pool access procedure according to an embodiment may be, for example, as follows: · In the case of an emergency, when a vehicle can connect to multiple frequency bands, for example, regardless of the presence or absence of multiple TX / RX chains: 〇 First, after an emergency packet arrives · Start with a dedicated band (<6 GHz, for example, the ITS band of approximately 5.9 GHz) and start the emergency transmission procedure 〇 Otherwise, if band transmission was not enabled or was insufficient (after a short waiting period T) · Switch to a lower frequency (<6 GHz) sidelink band on a configured bitmap or a pre-configured bitmap and start the emergency transmission procedure 〇 Otherwise, if band transmission was not permitted or was insufficient (after a short waiting period T) · Switch to a higher frequency (mmWave) ITS band (63 GHz) and initiate the emergency transmission procedure 〇 Otherwise, if band transmission is not permitted or is insufficient (after a short waiting period T) · Switch to a higher frequency (mmWave) permitted band on the configured or pre-configured bitmap and initiate the emergency transmission procedure 〇 Otherwise, end the procedure (mmWave = millimeter wave) (ITS = Intelligent Transport System)

[0151] Hereinafter, an embodiment for broadcasting a bitmap from a target UE to a non-target (autonomous) vehicle within emergency control information will be described. Specifically, the pre-configured map may be selectable, for example, to reduce the number of bitmap broadcasts of bits within sidelink control information (SCI).

[0152] FIG. 12 shows a sidelink subframe configuration transferred outside the coverage for emergency monitoring according to an embodiment.

[0153] Hereinafter, the PSCCH subframe and the resource block pool are considered.

[0154] When a vehicle processes an emergency request and the vehicle is within the coverage, the bitmap must be transmitted outside the coverage. This procedure is performed to adjust all vehicles outside the coverage for monitoring emergency data. The bitmap can be transmitted, for example, via SCI emergency control information.

[0155] As in existing systems, bitmaps are configured according to a periodic (pre-configured) pattern called a bitmap (subframeBitmap-r12 introduced in field SL-FR ResourceConfig in [5], section 6.3.8). The length of subframeBitmap-r12 is 40 bits. Those 40 bits can be transmitted over the Uu, for example, to convey an index T_RPT indicating the bitmap sequence to be used.

[0156] Similarly, subframeBitmap-r12 must be transferred to out-of-coverage vehicles to enable remote UEs to monitor emergency notifications and data transmissions on scheduled resources (see Figure 12 for further details). To reduce data transmissions on the SCI (via an exceptional pool), subframeBitmap-r12 can be remapped, for example, to a shorter emergency pool by designing a smaller bitmap table or, for example, by fixing the emergency notification bitmap (using, for example, a shorter exponent of bits).

[0157] Although some aspects of the concepts described have been described in the context of apparatus, it is clear that these aspects also represent a description of a corresponding method where a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method step also represent a description of a corresponding block, or item, or feature of a corresponding apparatus.

[0158] The various elements and features of the present invention can be implemented in hardware using analog and / or digital circuitry, in software through the execution of instructions by one or more general-purpose or special-purpose processors, or in 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.

[0159] FIG. 5 shows an example of a computer system 500 according to one embodiment. Units or modules, as well as steps of methods executed by these units, can be executed on one or more computer systems 500. The computer system 500 includes one or more processors 502, such as a dedicated or general-purpose digital signal processor. The processor 502 is connected to a communication infrastructure 504, such as a bus or network. The computer system 500 includes a primary memory 506, such as a random access memory (RAM), and a secondary memory 508, such as a hard disk drive and / or a removable storage drive. The secondary memory 508 can enable computer programs or other instructions to be loaded into the computer system 500. The computer system 500 may further include a communication interface 510 to enable software and data to be transferred between the computer system 500 and external devices. The communication may be in the form of electrical signals, electromagnetic signals, optical signals, or other signals that can be processed by the communication interface. The communication may use wires or cables, fiber optics, telephone lines, cellular phone links, RF links, and other communication channels 512.

[0160] The terms "computer program medium" and "computer-readable medium" are generally used to refer to tangible storage media, such as a hard disk installed in a removable storage unit or a hard disk drive. These computer program products are means for providing software to the computer system 500. A computer program, also called computer control logic, is stored in the primary memory 506 and / or the secondary memory 508. The computer program can also be received via the communication interface 510. When the computer program is executed, the computer The computer system 500 enables the implementation of the present invention. Specifically, a computer program, when executed, enables the processor 502 to implement the processes of the present invention, such as any of the methods described herein. Thus, such a computer program may represent the controller of the computer system 500. When the present disclosure is implemented using software, the software may be stored within a computer program product using an interface such as a removable storage drive, communication interface 510, and loaded into the computer system 500.

[0161] Implementations in hardware or software may store electronically readable control signals and may be executed using a digital storage medium, such as a cloud storage device, floppy (R) disk, DVD, Blue-Ray, CD, ROM, PROM, EPROM, EEPROM, or FLASH (R) memory, that stores the electronically readable control signals and cooperates (or is capable of cooperating) with a programmable computer system so that respective methods are executed. Thus, the digital storage medium may be computer-readable.

[0162] Some embodiments according to the present invention comprise a data carrier having electronically readable control signals capable of cooperating with a programmable computer system so that one of the methods described herein is executed.

[0163] Generally, embodiments of the present invention may be implemented as a computer program product comprising program code, the program code being operative to execute one of these methods when the computer program product is executed on a computer. The program code may be stored, for example, on a machine-readable carrier.

[0164] Other embodiments comprise a computer program for performing one of the methods described herein, stored on a machine-readable carrier. In other words, an embodiment of the method of the present invention is thus a computer program having program code for performing one of the methods described herein when the computer program is executed on a computer.

[0165] A further embodiment of the method of the present invention thus comprises a data carrier (or digital storage medium or computer-readable medium) having stored thereon a computer program for performing one of the methods described herein. A further embodiment of the method of the present invention is thus a data stream or a series of signals representing a computer program for performing one of the methods described herein. The data stream or the series of signals can be configured to be transferred, for example, via a data communication connection, for example via the Internet. A further embodiment comprises processing means, for example a computer or a programmable logic device, configured or adapted to perform one of the methods described herein. A further embodiment comprises a computer having installed thereon a computer program for performing one of the methods described herein.

[0166] In some embodiments, a programmable logic device (for example, a field programmable gate array) can be used to perform some or all of the functionality of the methods described herein. In some embodiments, the field programmable gate array can cooperate with a microprocessor to perform one of the methods described herein. Generally, these methods are preferably executed by any hardware device.

[0167] The embodiments described above are merely illustrative of the principles of the present invention. As described herein It is understood that modifications and variations of the following configurations and details will be apparent to those skilled in the art. Therefore, it is intended to be limited only by the following claims, rather than by the specific details presented in the description and explanation of the embodiments herein.

[0168] Abbreviations Abbreviations: Meanings BS Base Station CBR Channel Utilization Rate D2D Device-to-Device EN Emergency Notification (Example of Critical Communication Notification) eNB Evolved Node B (Base Station) FDM Frequency Division Multiplexing LTE Long Term Evolution PC5 Interface using the sidelink channel for D2D communication PPPP ProSe Packet Unit Priority PPPR ProSe Packet Unit Reliability PRB Physical Resource Block ProSe Proximity Services RA Resource Allocation SCI Sidelink Control Information SL Sidelink sTTI Short Transmission Time Interval TDM Time Division Multiplexing TDMA Time Division Multiple Access UE User Entity (User Terminal) URLLC Ultra-Reliable Low-Latency Communication V2V Vehicle-to-Vehicle V2I Vehicle-to-Infrastructure V2P Vehicle-to-Pedestrian V2N Vehicle-to-Network V2X Vehicle-to-Everything, e.g., V2V, V2I, V2P, V2N

[0169] References [1] 3GPP TS 36.213 Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Layer Procedures; V14.5.0 [2] TS 36.331 Evolved Universal Terrestrial Radio Access (E-UTRA) - Radio Resource Control (RRC); V14. [3] 3GPP TS 36.211 Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation, v14.3.0 [4] 3GPP TS 36.212 Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and Channel Coding, v14.3.0 [5] 3GPP TS 36.321 Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) Protocol Specification, v14.3.0 [6] 2017P59629 EP: Emergency Notification (URLLC) Requiring Simultaneous Unauthorized Transmission for V2X [7] NGMN Alliance White Paper "Small Cell Backhaul Requirements", Version 1.0, June 4, 2012

Explanation of Symbols

[0170] 100 Wireless Network 102 Core Network 1021 to 1023 Connections, Small Cell 104 Radio Access Network 1061 Cell, Macro Cell 1062 Cell 1063 Cell 1064 Cell 1065 Cell 1081 Arrow 1082 Arrow 1083 Arrow 1101 IoT Device 1102 IoT Device 1121 Arrow 1122 Arrow Backhaul links from 1141 to 1145 Backhaul links from 1161 to 1165 Area 1201, small cell Area 1202, small cell Area 1203, small cell Area 1204 Area 1205, small cell Backhaul links from 1221 to 1225 Arrow 1241 Arrow 1242, wireless access link (AL) User equipment 150, first user equipment Transmitter 152 Receiver 154 User equipment 250, second user equipment Transmitter 252 Receiver 254 Computer system 500 Processor 502 Communication infrastructure 504 Primary memory 506 Secondary memory 508 Communication interface 510 Communication channel 512 Exceptional pool, resource pool 611 Resource pool 621 Resource pool 622, normal pool Message 651, first message Message 661, second message Exceptional pool, resource pool 711 Resource pool 721, normal pool Message 751, first message Message 761, second message Exceptional pool, resource pool 811 (Normal) resource pool 821 Message 851, first message Message 853 861 Message, Critical Message 862 Message, Critical Message 863 Message, Critical Message 864 Message, Critical Message 865 Message, Critical Message 911 Exceptional Pool, Resource Pool 921 (Normal) Resource Pool 951 Message, First Message 953 Message 955 Message 961 Message, Critical Message 962 Message, Critical Message 963 Message, Critical Message 964 Message, Critical Message 965 Message 1011 Exceptional Pool 1021 Resource Pool, (Normal) Resource Pool 1051 Message, First Message 1054 Message 1061 Message 1062 Message 1063 Message 1064 Message 1071 Other Message 1072 Other Message 1073 Other Message 1111 Exceptional Pool 1121 Resource Pool, (Normal) Resource Pool 1122 Resource Pool, Normal Resource Pool 1151 Message, First Message 1154 Message 1156 Message, First Message 1157 Message, Another Message 1161 Message, High-Priority Message, Critical Message 1162 Message, High-Priority Message, Critical Message 1163 Message, High-Priority Message, Critical Message 1164 Message, High-Priority Message, Critical Message 1166 Message, High-Priority Message, Critical Message 1167 Message, High-Priority Message, Critical Message 1171 Other Messages with Low Priority 1172 Other Messages with Low Priority 1173 Other Messages with Low Priority 1174 Other Messages with Low Priority 1176 Other Messages with Low Priority 1177 Other Messages with Low Priority

Claims

1. A method for operating a user equipment for wireless communication, wherein the user equipment comprises a transmitter, and a receiver, and in the method, a first resource pool defined by a first resource pool configuration comprises a first plurality of resources for transmission, a second resource pool defined by a second resource pool configuration comprises a second plurality of resources for transmission, and the second resource pool configuration is different from or equal to the first resource pool configuration, the method comprises a step in which the transmitter of the user equipment transmits a first critical communication notification, which is a first message, within the first resource pool, and the first critical communication notification indicates that a second message is to be transmitted within the second resource pool, a step in which the transmitter of the user equipment transmits the second message within the second resource pool after transmitting the first critical communication notification or simultaneously with transmitting the first critical communication notification, and in the method, a third resource pool defined by a third resource pool configuration comprises a third plurality of resources for transmission, a fourth resource pool defined by a fourth resource pool configuration comprises a fourth plurality of resources for transmission, and the fourth resource pool configuration is different from or equal to the third resource pool configuration, the method comprises a step in which the receiver of the user equipment receives a second critical communication notification, which is a third message, transmitted within the third resource pool, and the second critical communication notification indicates that a fourth message is to be transmitted within the fourth resource pool, a step in which the transmitter of the user equipment determines not to transmit anything within the fourth resource pool in response to the receiver's reception of the second critical communication notification, and in the method, the first resource pool is an exceptional pool that is a shared pool or a configured permission within all bandwidths, sub-bandwidths, or bandwidth portions for providing the first plurality of resources for transmission having a high priority The second resource pool is a normal pool for providing the second plurality of resources for transmission, having a priority lower than the high priority, The method comprises: the transmitter transmitting the second message having the high priority within the exceptional pool, which is a shared pool or a configured grant within the full bandwidth, sub-bandwidth, or bandwidth part; the transmitter transmitting a sixth message having the low priority within the normal pool. **Claim 2**: A method for operating a user equipment for wireless communication, wherein the user equipment comprises: a transmitter; a receiver; and in the method, a first resource pool defined by a first resource pool configuration comprises a first plurality of resources for transmission, and a second resource pool defined by a second resource pool configuration comprises a second plurality of resources for transmission, and the second resource pool configuration is different from or equal to the first resource pool configuration; the method comprises: the transmitter of the user equipment transmitting, within the first resource pool, a first critical communication notification that is a first message, wherein the first critical communication notification indicates that a second message is to be transmitted within the second resource pool; the transmitter of the user equipment transmitting the second message within the second resource pool after or simultaneously with transmitting the first critical communication notification; and in the method, a third resource pool defined by a third resource pool configuration comprises a third plurality of resources for transmission, and a fourth resource pool defined by a fourth resource pool configuration comprises a fourth plurality of resources for transmission, and the fourth resource pool configuration is different from or equal to the third resource pool configuration; the method comprises: the receiver of the user equipment receiving a second critical communication notification that is a third message, wherein the second critical communication notification is transmitted within the third resource pool and indicates that a fourth message is to be transmitted within the fourth resource pool; The step in which the transmitter of the user equipment determines not to transmit anything within the fourth resource pool in response to the reception of the second critical communication notification by the receiver; comprising; In the method, the third resource pool is an exceptional pool for providing the third plurality of resources for transmission, having a high priority; the fourth resource pool is a normal pool for providing the fourth plurality of resources for transmission, having a priority lower than the high priority; the method is; the step in which the transmitter transmits the fourth message having the high priority within the exceptional pool; the step in which the transmitter transmits the sixth message having the low priority within the normal pool. A method comprising these steps.

3. A method for operating a user equipment for wireless communication, wherein the user equipment comprises a transmitter and a receiver; In the method, a first resource pool defined by a first resource pool configuration comprises a first plurality of resources for transmission, and a second resource pool defined by a second resource pool configuration comprises a second plurality of resources for transmission, and the second resource pool configuration is different from or equal to the first resource pool configuration; the method is; the step in which the transmitter of the user equipment transmits a first critical communication notification, which is a first message, within the first resource pool, and the first critical communication notification indicates that a second message is to be transmitted within the second resource pool; the step in which the transmitter of the user equipment transmits the second message within the second resource pool after transmitting or simultaneously with transmitting the first critical communication notification; comprising; In the method, a third resource pool defined by a third resource pool configuration comprises a third plurality of resources for transmission, and a fourth resource pool defined by a fourth resource pool configuration comprises a fourth plurality of resources for transmission, and the fourth resource pool configuration is different from or equal to the third resource pool configuration; the method is; ​ The step in which the receiver of the user equipment receives a second critical communication notification that is a third message, where the second critical communication notification is transmitted within the third resource pool, and the second critical communication notification indicates that a fourth message is transmitted within the fourth resource pool. The step in which the transmitter of the user equipment determines not to transmit anything within the fourth resource pool in response to the receiver's receipt of the second critical communication notification. The step in which, in response to the receiver's receipt of the second critical communication notification, the transmitter sends the third message to one or more other user equipment, where the third message indicates that the fourth message is transmitted within the fourth resource pool. A method having these steps. **Claim 4**: A method for operating a user equipment for wireless communication, wherein the user equipment comprises a transmitter and a receiver, and in the method, a first resource pool defined by a first resource pool configuration comprises a first plurality of resources for transmission, a second resource pool defined by a second resource pool configuration comprises a second plurality of resources for transmission, and the second resource pool configuration is different from or equal to the first resource pool configuration. The method comprises the step in which the transmitter of the user equipment transmits a first critical communication notification that is a first message within the first resource pool, where the first critical communication notification indicates that a second message is transmitted within the second resource pool. The step in which the transmitter of the user equipment transmits the second message within the second resource pool after transmitting the first critical communication notification or simultaneously with transmitting the first critical communication notification. and in the method, a third resource pool defined by a third resource pool configuration comprises a third plurality of resources for transmission, a fourth resource pool defined by a fourth resource pool configuration comprises a fourth plurality of resources for transmission, and the fourth resource pool configuration is different from or equal to the third resource pool configuration. The method comprises: a step in which the receiver of the user equipment receives a second critical communication notification that is a third message, the second critical communication notification being transmitted within the third resource pool, and the second critical communication notification indicating that a fourth message is transmitted within the fourth resource pool; a step in which the transmitter of the user equipment determines not to transmit anything within the fourth resource pool in response to the receiver's reception of the second critical communication notification; and the user equipment is configured to be installed within a vehicle; The method further comprises: when the user equipment of the vehicle has an emergency request and the vehicle is within the coverage of a base station, a step in which the receiver of the user equipment receives a subframe bitmap from the base station, and a step in which the transmitter of the user equipment transmits the subframe bitmap received from the base station to another vehicle outside the coverage of the base station. Claim 5 The first resource pool is defined as a shared resource pool, or a common configured permission, or a commonly accessed bandwidth portion, or an exceptionally configured pool, and / or the third resource pool is defined as a shared resource pool, or a common configured permission, or a commonly accessed bandwidth portion, or an exceptionally configured pool. The method according to any one of claims 1 to 4. Claim 6 The second resource pool is defined as a resource pool for communication, or a preconfigured communication resource, or an allocated bandwidth portion, or a dynamically permitted resource, and / or the fourth resource pool is defined as a resource pool for communication, or a preconfigured communication resource, or an allocated bandwidth portion, or a dynamically permitted resource. The method according to any one of claims 1 to 5. Claim 7 Does the first message include a pointer to the second message in the second resource pool that defines one or more frequency locations and time locations of the second message; or does the first message include the pointer to the second message in the second resource pool that defines the one or more frequency locations, the time location, and a repetition period of the second message, and / or Does the third message include a pointer to the fourth message in the fourth resource pool that defines one or more frequency locations and time locations of the fourth message; or does the third message include the pointer to the fourth message in the fourth resource pool that defines the one or more frequency locations, the time location, and the repetition period of the fourth message The method according to any one of claims 1 to 6.

8. The first resource pool comprises a first plurality of preconfigured resources for sidelink transmission, the second resource pool comprises a second plurality of resources for sidelink transmission, the third resource pool comprises a third plurality of resources for sidelink transmission, and the fourth resource pool comprises a fourth plurality of resources for sidelink transmission The method according to any one of claims 1 to 7.

9. The step that the transmitter transmits a first critical communication notification in the first resource pool within a first time slot; The step that the transmitter transmits the second message in the second resource pool after transmitting the first critical communication notification within a second time slot, where the second time slot is a time slot delayed with respect to the first time slot, in the method according to any one of claims 1 to 8.

10. The transmitter has a step of transmitting the second message in the second resource pool within the same time slot when the first critical communication notification is transmitted, or in a subsequent time slot after the first critical communication notification is transmitted The method according to any one of claims 1 to 8.

11. The step of the transmitter transmitting the first critical communication notification including an indication indicating a transmission resource among the second plurality of resources for transmission in the second resource pool; The step of the transmitter transmitting the second message within the transmission resource indicated by the indication, wherein the indication includes a pointer to the transmission resource, or includes a subframe indication indicating a subframe, or includes a frequency indication indicating a frequency, or includes a component carrier indication indicating a component carrier, the method according to any one of claims 1 to 10.

12. The method according to any one of claims 1 to 11, having the step of the transmitter stopping transmitting a fifth message within the fourth resource pool in response to the receiver receiving the second critical communication notification.

13. A fifth message is scheduled to be transmitted within the fourth resource pool, The method according to any one of claims 1 to 11, having the step of the transmitter determining not to transmit the fifth message within the fourth resource pool in response to the receiver receiving the second critical communication notification.

14. The method according to any one of claims 1 to 13, having the step of the transmitter transmitting the first critical communication notification within the first resource pool without sensing whether the first resource pool is occupied by another transmission. The method according to any one of claims 1 to 13.

15. After transmitting the first critical communication notification for the first time, the method according to any one of claims 1 to 14, having the step of the transmitter retransmitting the first critical communication notification within the first resource pool one or more additional times. The method according to any one of claims 1 to 14.

16. The step of the transmitter transmitting the first critical communication notification using a first transmission power; The step of the transmitter transmitting the second message using a second transmission power, wherein the first transmission power is greater than the second transmission power, The method according to any one of claims 1 to 15.

17. At least one of the first critical communication notification and the second critical communication notification is sidelink control information including one or more sidelink control information data elements, and the sidelink control information data elements include at least one of a component carrier index, a subframe index, an SPS period, an offset with respect to the transmission, a subchannel size, and an indication indicating whether frequency hopping is enabled. The method according to any one of claims 1 to 16.

18. The first resource pool, the second resource pool, the third resource pool, and the fourth resource pool are each assigned to a plurality of component carriers. The first resource pool is assigned to a first component carrier among the plurality of component carriers. The second resource pool is assigned to a second component carrier among the plurality of component carriers, and the second component carrier is different from the first component carrier. The method according to any one of claims 1 to 17.

19. The first resource pool, the second resource pool, the third resource pool, and the fourth resource pool are each assigned to a plurality of component carriers. The first resource pool is assigned to a first component carrier among the plurality of component carriers. The second resource pool is also assigned to the first component carrier. The method according to any one of claims 1 to 17.

20. The first resource pool is located on the same component carrier as the second resource pool, or The third resource pool is located on the same component carrier as the fourth resource pool. The method according to any one of claims 1 to 19.

21. The first resource pool is not located on the same component carrier as the second resource pool, or The third resource pool is not located on the same component carrier as the fourth resource pool. The method according to any one of claims 1 to 19. A computer program, executed by a processor of a user device, for causing the processor to execute the method according to any one of claims 1 to 21.

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