Enhanced Quality of Service for V2X

Abstract

An embodiment provides a transceiver for a wireless communication system, wherein the transceiver is configured to communicate with at least one other transceiver of the wireless communication system using a sidelink resource pool [a mode 3 resource pool, a mode 4 resource pool, a shared resource pool, a non-shared resource pool, or a special resource pool] of the wireless communication system, wherein the transceiver is configured to send a data packet to other transceivers of the wireless communication system on one of the sidelink resource pools of the wireless communication system, wherein the transceiver is configured to: if a PPPR value associated with the data packet or with data contained in the data packet indicates high reliability [of the data packet], then retransmit the data packet at least once on another sidelink resource pool in the sidelink resource pool of the wireless communication system.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication networks, and more particularly to concepts for transmitting data for Ultra-Reliable Low Latency Communication (URLLC).Some embodiments relate to enhanced quality of service for V2X. Background Art

[0002] Figure 1 1 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 gNB1 to gNB5, each serving a specific area around the base station, schematically represented by respective cells 1061 to 1065. The base stations are provided to serve users within the cells. The term base station (BS) is referred to as gNB in ​​5G networks, as eNB in ​​UMTS / LTE / LTE-A / LTE-A Pro, or simply as BS in other mobile communication standards. Users may be fixed devices or mobile devices. In addition, the wireless communication system may be accessed through mobile or fixed IoT devices connected to the base stations or users. Mobile devices or IoT devices may include physical devices, ground vehicles such as robots or cars, aerial vehicles such as manned or unmanned aerial vehicles (UAVs), the latter also referred to as drones, buildings, and other items in which electronics, software, sensors, actuators, etc. are embedded, as well as network connections that enable these devices to collect and exchange data over existing network infrastructure. Figure 1 An exemplary view of only five cells is shown, however, the wireless communication system may include many more such cells. Figure 1 Two users UE1 and UE2, also referred to as user equipment (UE), are shown, which are in cell 1062 and served by base station gNB2. Another user UE3 is shown in cell 1064, which is served by base station gNB4. Arrows 1081, 1082 and 1083 schematically represent uplink / downlink connections for sending data from users UE1, UE2 and UE3 to base stations gNB2, gNB4 or for sending data from base stations gNB2, gNB4 to users UE1, UE2, UE3. Users (e.g., mobile devices (e.g., vehicles containing UEs)) can further communicate directly with each other in both in-coverage mode (e.g., LTE V2X Mode 3; correspondingly, D2D Mode 1 or NR V2X Mode 1) and out-of-coverage mode (e.g., LTE V2X Mode 4; correspondingly, D2D Mode 2 or NR V2X Mode 2) using the PC5 interface (e.g., in the case of D2D, LTE V2X / V2V or NR V2X / V2V), which will be referred to below Figure 3 and Figure 4 Discussion. In addition, Figure 1Two IoT devices 1101 and 1102 are shown in a cell 1064, which may be fixed or mobile devices. IoT device 1101 accesses the wireless communication system via base station gNB4 to receive and send data, as schematically shown by arrow 1121. IoT device 1102 accesses the wireless communication system via user UE3, as schematically shown by arrow 1122. Each base station gNB1 to gNB5 may be connected to the core network 102, for example via an S1 interface, via corresponding backhaul links 1141 to 1145, which are connected to the core network 102 via S1 interfaces. Figure 1 The core network 102 may be connected to one or more external networks. In addition, some or all of the base stations gNB1 to gNB5 may be connected to each other via corresponding backhaul links 1161 to 1165, for example, via an S1 or X2 interface or an XN interface in NR. Figure 1 This is schematically represented by arrows pointing to the “gNBs” in the figure.

[0003] Figure 1 The wireless network or communication system depicted in the figure may be a heterogeneous network having two different overlapping networks, a network of macro cell pairs (where each macro cell includes a macro base station, such as base stations eNB1 to eNB5) and a network of small cell base stations (such as femto or pico base stations) ( Figure 1 not shown).

[0004] For data transmission, a physical resource grid may be used. The physical resource grid may include a set of resource elements to which various physical channels and physical signals are mapped. For example, a physical channel may include a physical downlink and uplink shared channel (PDSCH, PUSCH) carrying user-specific data (also referred to as downlink and uplink payload data), a physical broadcast channel (PBCH) carrying, for example, a master information block (MIB) and a system information block (SIB), a physical downlink and uplink control channel (PDCCH, PUCCH) carrying, for example, downlink control information (DCI), etc. For the uplink, once the UE is synchronized and has obtained the MIB and SIB, the physical channel may also include a physical random access channel (PRACH or RACH) used by the UE to access the network. Physical signals may include reference signals (RS), synchronization signals, etc. The resource grid may include a frame or radio frame having a specific duration (e.g., 10 milliseconds) in the time domain and a given bandwidth in the frequency domain. The frame may have a certain number of subframes with a predetermined length, for example, 2 subframes with a length of 1 millisecond. Each subframe may include two slots with 6 or 7 OFDM symbols, depending on the length of the cyclic prefix (CP). A frame may also consist of a smaller number of OFDM symbols, for example using a shortened transmission time interval (sTTI) or a mini-slot / non-slot based frame structure containing only a few OFDM symbols.

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

[0006] In such Figure 1 In the wireless communication network shown, the radio access network 104 may be a heterogeneous network including a network of primary cells, each of which includes a primary base station, also known as a macro base station. In addition, a plurality of secondary base stations, also known as small cell base stations, may be provided for each macro cell. Figure 2 is similar to having two different overlapping networks Figure 1 Schematic diagram of a cell 1061 in the network, the network includes a macro cell network including a macro cell 1061 and a small cell network. Figure 2 It only represents a single macro cell, but please note that Figure 1One or more other cells in the small cell network may also use an overlapping network. The small cell network includes a plurality of small cell base stations SeNB1 to SeNB5, each of which operates in a corresponding area 1201 to 1205, which is 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 connected to the corresponding small cell base stations SeNB1 to SeNB5 via corresponding backhaul links 1221 to 1225. In addition to connecting the small cell base station to the macro cell base station via the backhaul link, one or more small cell base stations may be coupled to the core network via the corresponding backhaul link. Figure 2 It is also shown that the user equipment UE is served by the macro cell base station MeNB1 as indicated by arrow 1241 and the user equipment UE is served by the small cell base station SeNB1 as schematically indicated by arrow 1242 .

[0007] In a mobile communication network, for example, in the above reference Figure 1 and Figure 2 In those networks described (e.g., LTE or 5G / NR networks), there may be UEs that communicate directly with each other via one or more sidelink (SL) channels, for example using a PC5 interface. UEs that communicate directly with each other via sidelinks may include vehicles that communicate directly with other vehicles (V2V communication), vehicles that communicate with other entities of a wireless communication network (e.g., entities on the roadside, such as traffic lights, traffic signs, pedestrians, or network infrastructure (V2I)) (V2X communication). Other UEs may not be vehicle-related UEs, but may include any of the above-mentioned devices. Such devices may also communicate directly with each other using sidelink channels (i.e., direct communication, such as D2D or V2X communication, where V2X can be considered a special form of D2D, such as D2D with mobility).

[0008] When considering two UEs communicating directly with each other via a side link, the two UEs may be served by the same base station, i.e., both UEs may be within the coverage area of ​​the base station, which may be Figure 1 One of the base stations shown. This is called the "in coverage" scenario. According to other examples, both UEs communicating via the sidelink may not be served by the base station, which is called the "out of coverage" scenario. Note that "out of coverage" does not mean that the two UEs are not Figure 1 or Figure 2 In one of the cells shown, it means that these UEs are not connected to the base station, for example, they are not in the RRC connected state. Another scenario is called the "partial coverage" scenario, according to which one of the two UEs communicating with each other via the side link is served by the base station, while the other UE is not served by the base station. In each of the above cases, the UE and / or the BS should be aware of the resources to be used for the side link communication between the UEs.

[0009] Figure 3 A schematic diagram is shown of a situation in which two UEs communicating directly with each other are both within the coverage of a base station. The base station gNB has a coverage area schematically represented by a circle 200, which substantially corresponds to Figure 1 or Figure 2 A cell is schematically represented. UEs communicating directly with each other include a first vehicle 202 and a second vehicle 204, both of which are in the coverage area 200 of the base station gNB (this also applies to any case where 2 UEs are connected to different gNBs). Both vehicles 202, 204 are connected to the base station gNB, and in addition, they are directly connected to each other via a PC5 interface. The gNB assists in the scheduling and / or interference management of V2V traffic via control signaling on the Uu interface, which is the radio interface between the base station and the UE. The BS schedules and allocates resources in a given resource pool to be used for V2V communication via the side link. The UE operates in this mode only when it is in coverage and in the RRC_CONNECTED state. This configuration is also called Mode 3 configuration (e.g. for LTE V2X; for D2D, this is called Mode 1). For NRV2X (starting from Release 16), this is called Mode 1.

[0010] Figure 4 A scenario is shown in which the UE is out of coverage of the BS, i.e. the individual UEs communicating directly with each other may or may not be connected to the base station (i.e. they may also be physically located within the coverage of the wireless communication network and may even be in RRC_CONNECTED or RRC_IDLE state). Three vehicles 206, 208 and 210 are shown communicating directly with each other on the side link, for example by using a PC5 interface. The scheduling and / or interference management of V2V traffic is based on algorithms implemented in the UE and / or (partially) pre-configured by the network. This configuration is also referred to as Mode 4 configuration (e.g. for LTE V2X). For D2D, this is referred to as Mode 2. For NR V2X, this is referred to as Mode 2.

[0011] As mentioned above, Figure 4 The scenario in which the scenario is an out-of-coverage scenario does not mean that the corresponding Mode 4 UE (e.g., for LTE V2X; correspondingly, Mode 2 for D2D or NR V2X) is necessarily out of the coverage of the base station, but means that the corresponding Mode 4 UE is not served by the base station or is not connected to the base station in the coverage area. Figure 3In the illustrated coverage area 200, in addition to mode 3 UEs 202, 204 (e.g., for LTE V2X; correspondingly, mode 1 for D2D or NR V2X), there are also mode 4 UEs 206, 208, 210 (e.g., for LTE V2X; correspondingly, mode 2 for D2D or NR V2X). Since the mode 4 UEs 206-210 schedule their resources autonomously and are not connected to the network, the base station is unaware of the resources used by the mode 4 UEs 206-210 for sidelink communication. Similarly, the mode 4 UEs 206-210 are unaware of the resources scheduled by the base station gNB for the mode 3 UEs 202, 204 for sidelink communication. Therefore, resource conflicts may occur between UEs in each mode and between mode 4 UEs.

[0012] Reference above Figures 1 to 4 In the wireless communication network, the current (e.g. LTE) V2X specification of 3GPP supports two modes:

[0013] Mode 3: Resource configuration via eNB. The UE connects to an eNB that supports V2X operations and obtains its resources from the eNB.

[0014] Mode 4: Autonomous mode / distributed scheduling. Requires the UE to detect the appropriate resources by itself. Currently, one second of sensing is required before any resources are used for transmission.

[0015] In wireless communication networks, the 3GPP sidelink specification for ProSe or D2D (starting from Release 12) supports two modes:

[0016] Mode 1: Resource configuration by eNB or gNB. The UE connects to an eNB or gNB that supports sidelink configuration and obtains its resources from the eNB or gNB.

[0017] Mode 2: Requires the UE to detect appropriate resources by itself.

[0018] In wireless communication networks, 3GPP's NR sidelink V2X specification (starting from Release 16) supports 2 modes:

[0019] Mode 1: Resource configuration via gNB or eNB. The UE connects to a gNB or eNB that supports sidelink configuration and obtains its resources from either of them.

[0020] Mode 2: The UE is required to detect the appropriate resources by itself. The UE determines (i.e., the BS does not schedule) the SL transmission resources within the SL resources configured by the BS / network or the pre-configured SL resources

[13] .

[0021] The so-called emergency pool is a special resource pool that can be used for very limited purposes (eg during handover) by UEs that have no resources configured for transmission.

[0022] Current 3GPP specifications include PPPP-based priority handling including preferred scheduling and selection of a PPPP-associated resource pool for data transmission.

[0023] V2X, V2V, D2D and sidelink are described in [1, 3, 4]. Unlicensed transmission in the sidelink (transmission mode 2 for D2D and mode 4 for LTE V2X) is described in [2, 5].

[0024] Regarding network slicing, it is agreed that (RAN2) UEs currently support up to 8 slices in parallel. However, the network may need to support many (e.g. hundreds) of slices [7].

[0025] To improve reliability, packet replication is foreseen in the specification. How this scheme can best be implemented, especially with regard to the new topics Mode 3 (e.g. for LTE V2X; additional Mode 1 for D2D; Mode 1 for NR V2X) and Mode 4 (e.g. for LTE V2X; additional Mode 2 for D2D or Mode 2 for NR V2X) resource pool sharing, remains an open topic. Summary of the invention

[0026] Therefore, the object of the present invention is to provide a concept for implementing packet duplication, in particular with regard to the new topic Mode 3 and Mode 4 resource pool sharing for LTE V2X and / or Mode 1 and Mode 2 resource pool sharing for NR V2X and D2D.

[0027] This object is solved by the independent claims.

[0028] Advantageous implementations are set forth in the dependent claims.

[0029] An embodiment provides a transceiver for a wireless communication system, wherein the transceiver is configured to communicate with at least one other transceiver of the wireless communication system using a sidelink resource pool of the wireless communication system [e.g., a mode 3 resource pool, a mode 4 resource pool, a shared resource pool, a non-shared resource pool, or an abnormal resource pool], wherein the transceiver is configured to send a data packet to other transceivers of the wireless communication system on one of the sidelink resource pools of the wireless communication system, wherein the transceiver is configured to: if a PPPR value (PPRR=ProSe per packet reliability) associated with the data packet or data contained in the data packet indicates high reliability [of the data packet], then retransmit the data packet at least once on another sidelink resource pool in the sidelink resource pool of the wireless communication system.

[0030] For example, for NR-V2X, at least for non-unicast (e.g., broadcast or multicast) communication scenarios, a per-packet priority is specified (similar to PPPP or PPPR in LTE, e.g., any QoS metric).

[0031] For example, for NR V2X for unicast and possibly multicast communications, a bearer-based model is being specified using other QoS metrics such as 5QI, PQI or VQI or any other QoS flow value (

[14] ,

[15] ,

[16] ).

[0032] In an embodiment, the number of retransmissions of the data packet depends on the PPPR value.

[0033] In an embodiment, the transceiver is configured to obtain (eg, receive from, determine or extract from the data packet) a PPPR value associated with the data packet or with data contained in the data packet.

[0034] In an embodiment, the sidelink resource pool of the wireless communication system is at least two of a mode 3 resource pool, a mode 4 resource pool, a shared resource pool, a non-shared resource pool, or an abnormal resource pool.

[0035] In an embodiment, the range of PPPR values ​​is 1 to 8, where a PPPR value of 1 indicates the highest reliability and a PPPR value of 8 indicates the lowest reliability.

[0036] In an embodiment, if the PPPR value exceeds a predetermined threshold, the transceiver is configured to retransmit the data packet at least once.

[0037] Thus, note that since the PPPR value mapping to reliability is inverted, ie, 1 is the highest priority and 8 is the lowest priority, "exceeding the threshold" means that the PPPR value is equal to or less than a predetermined PPPR value.

[0038] In detail, the priority threshold indicates the upper limit of the PPPP range associated with the configuration in cbr-ConfigIndex and tx-ConfigIndexList. For consecutive entries of SL-PPPR-TxConfigIndex in SL-CBR-PPPR-TxConfigList, the upper limit of the PPPR range is configured in ascending order. For the first entry of SL-PPPR-TxConfigIndex, the lower limit of the PPPR range is 1.

[0039] In an embodiment, if the PPPR value indicates a reliability equal to or higher than a predetermined reliability, the transceiver is configured to retransmit the data packet at least once.

[0040] For example, for NR-V2X, the transceiver is configured as

[0041] For per-packet QoS model: retransmit the data packet at least once

[0042] For bearer-based QoS model: Establish parallel or multiple bearers if a QoS metric (e.g. 5QI, PQI, VQI or PPPP or PPPR or any other QoS metric) exceeds a predefined threshold. ([TS 23.501], [TR 23.786],

[16] )

[0043] In an embodiment, the transceiver is served by a central transceiver (e.g., a base station) of a wireless communication system, wherein the transceiver is configured to operate in (e.g., LTE) V2X mode 3 as a central transceiver to perform scheduling of resources for communicating with at least one other transceiver, wherein the transceiver is configured to send the data packet on a (e.g., LTE) V2X mode 3 resource pool in a sidelink resource pool of the wireless communication system, and wherein the transceiver is configured to retransmit the data packet at least once on a (e.g., LTE) V2X mode 4 resource pool, a shared resource pool, a non-shared resource pool, or an exception resource pool in a sidelink resource pool of the wireless communication system.

[0044] In an embodiment, the transceiver is served by a central transceiver (e.g., a base station) of a wireless communication system, wherein the transceiver is configured to perform NR V2X mode 1 operation as a central transceiver to schedule resources for communicating with at least one other transceiver, wherein the transceiver is configured to send a data packet on an NR V2X mode 1 resource pool in a sidelink resource pool of the wireless communication system, and wherein the transceiver is configured to retransmit the data packet at least once on the same or different mode 1 NR V2X resource pool, the same or different mode 3 LTE V2X resource pool, an LTE V2X mode 4 resource pool, a shared resource pool, a non-shared resource pool, or an exception resource pool in the sidelink resource pool of the wireless communication system.

[0045] In an embodiment, the transceiver is served by a central transceiver (e.g., a base station) of a wireless communication system, wherein the transceiver is configured to operate in D2D mode 1 as a central transceiver to perform scheduling of resources for communicating with at least one other transceiver, wherein the transceiver is configured to send data packets on the same or different D2D mode 1 resource pools in a sidelink resource pool of the wireless communication system, and wherein the transceiver is configured to retransmit the data packet at least once on a D2D mode 2 resource pool, a shared resource pool, a non-shared resource pool, or an exception resource pool in a sidelink resource pool of the wireless communication system.

[0046] In an embodiment, the transceiver is configured to operate in (e.g., LTE) V2X mode 4 in which the transceiver is configured to autonomously schedule resources for sidelink communication, wherein the transceiver is configured to send a data packet on a (e.g., LTE) V2X mode 4 resource pool in a sidelink resource pool of a wireless communication system, and wherein the transceiver is configured to retransmit the data packet at least once on a (e.g., LTE) V2X mode 3 resource pool, a shared resource pool, a non-shared resource pool, or an exception resource pool in a sidelink resource pool of the wireless communication system.

[0047] In an embodiment, the transceiver is configured to operate in NR V2X mode 2 in which the transceiver is configured to autonomously schedule resources for sidelink communication, wherein the transceiver is configured to send a data packet on an NR V2X mode 2 resource pool in a sidelink resource pool of a wireless communication system, and wherein the transceiver is configured to retransmit the data packet at least once on an NR V2X mode 2 resource pool, an NR V2X mode 1 resource pool, an LTE V2X mode 4 resource pool, an LTE V2X mode 3 resource pool, a shared resource pool, a non-shared resource pool, or an exception resource pool in the sidelink resource pool of the wireless communication system.

[0048] In an embodiment, the transceiver is configured to operate in D2D mode 2 in which the transceiver is configured to autonomously schedule resources for sidelink communication, wherein the transceiver is configured to send data packets on a D2D mode 2 resource pool in a sidelink resource pool of a wireless communication system, and wherein the transceiver is configured to retransmit the data packet at least once on a D2D mode 2 resource pool, a D2D mode 1 resource pool, a shared resource pool, a non-shared resource pool, or an abnormal resource pool in the sidelink resource pool of the wireless communication system.

[0049] In an embodiment, the transceiver is configured to send the data packet on an abnormal resource pool in a sidelink resource pool of a wireless communication system in the event of RLF (radio link failure) / no sensing information or available switching, and retransmit the data packet at least once on a previously used resource pool in the sidelink resource pool of the wireless communication system (e.g., before RLF / no sensing information or available switching).

[0050] In an embodiment, the transceiver is configured to send the data packet on a component carrier in case of carrier aggregation and to retransmit the data packet at least once on another component carrier.

[0051] A further embodiment provides a transceiver for a wireless communication system, wherein the transceiver is configured to communicate with at least one other transceiver of the wireless communication system, wherein the transceiver is configured to send a data packet to the other transceivers of the wireless communication system on a component carrier, and wherein the transceiver is configured to: if a PPPR value associated with the data packet or with data contained in the data packet indicates high reliability, then retransmit the data packet at least once on at least one other component carrier.

[0052] In an embodiment, if the PPPR value indicates a reliability equal to or above a predetermined reliability or threshold, the transceiver is configured to retransmit the data packet at least once.

[0053] In an embodiment, the transceiver is served by a central transceiver (e.g., a base station) of a wireless communication system, wherein the transceiver is configured to operate in LTE V2X mode 3, NR V2X mode 1, or D2D mode 1 in which the central transceiver performs scheduling of resources for communicating with at least one other transceiver.

[0054] In an embodiment, the transceiver is configured to operate in LTE V2X Mode 4, NR V2X Mode 2 or D2D Mode 2 in which the transceiver is configured to autonomously schedule resources for sidelink communication.

[0055] In an embodiment, the transceiver is configured to operate using carrier aggregation.

[0056] A further embodiment provides a transceiver for a wireless communication system, wherein the transceiver is configured to communicate with at least one other transceiver of the wireless communication system using a sidelink resource pool of the wireless communication system, wherein the transceiver is configured to send a data packet to the other transceivers of the wireless communication system over one of the sidelink resource pools of the wireless communication system, wherein the transceiver is configured to: if a PPPR value associated with the data packet or with data contained in the data packet indicates high reliability, retransmit the data packet at least once over:

[0057] - on another sidelink resource pool in the sidelink resource pool of the wireless communication system,

[0058] - or, in case of carrier aggregation, on another component carrier,

[0059] - or on the same resource pool in a sidelink resource pool of a wireless communication system, but on a different carrier.

[0060] In an embodiment, if the PPPR value indicates a reliability equal to or above a predetermined reliability or threshold, the transceiver is configured to retransmit the data packet at least once.

[0061] In an embodiment, the transceiver is served by a central transceiver (e.g., a base station) of a wireless communication system, wherein the transceiver is configured to operate in LTE V2X mode 3, NR V2X mode 1, or D2D mode 1 in which the central transceiver performs scheduling of resources for communicating with at least one other transceiver.

[0062] In an embodiment, the transceiver is configured to operate in LTE V2X Mode 4, NR V2X Mode 2 or D2D Mode 2 in which the transceiver is configured to autonomously schedule resources for sidelink communication.

[0063] A further embodiment provides a method for transmitting data packets between at least two transceivers communicating with each other using a sidelink resource pool [e.g., a mode 3 resource pool, a mode 4 resource pool, a shared resource pool, a non-shared resource pool, or an abnormal resource pool] of a wireless communication system. The method comprises the following steps: sending a data packet to other transceivers of the wireless communication system on one of the sidelink resource pools of the wireless communication system. In addition, the method comprises the following steps: if a PPPR value associated with the data packet or with data contained in the data packet indicates a high reliability [of the data packet], retransmitting the data packet at least once on another of the sidelink resource pools of the wireless communication system.

[0064] A further embodiment provides a method for transmitting data packets between at least two transceivers communicating with each other in a wireless communication system. The method comprises sending a data packet to other transceivers of the wireless communication system on a component carrier. In addition, the method comprises the following steps: if a PPPR value associated with the data packet or with data contained in the data packet indicates high reliability, retransmitting the data packet at least once on at least one other component carrier.

[0065] A further embodiment provides a method for transmitting data packets between at least two transceivers in a wireless communication system that communicate with each other using a sidelink resource pool of the wireless communication system. The method comprises the following steps: sending a data packet to other transceivers of the wireless communication system on one of the sidelink resource pools of the wireless communication system. In addition, the method comprises the following steps: if a PPPR value associated with the data packet or with data contained in the data packet indicates high reliability, retransmitting the data packet at least once on:

[0066] - on another sidelink resource pool in the sidelink resource pool of the wireless communication system,

[0067] - or, in case of carrier aggregation, on another component carrier,

[0068] - or on the same resource pool in a sidelink resource pool of a wireless communication system, but on a different carrier.

[0069] Further embodiments provide a high priority data handling taking into account the reliability required for packet replication over shared / non-shared / exceptional resource pools using PPPR.

[0070] A further embodiment uses PPPR information for network slicing.

[0071] A further embodiment uses the PPPR value to allow resource reservation in a continuous resource pool by adding dummy data in the current resource pool (SCI).

[0072] Starting from Release 13, ProSe Per-Packet Priority (PPPP) has been defined for maintaining QoS in V2X. The application layer sets a priority for each V2X message and passes it to the lower layers. The MAC layer then prioritizes the logical channels and maps them to transport channels based on the priority. PPPP takes into account the latency required by both the eNB and the UE. Recently, in order to maintain and support the stringent requirements of advanced use cases, ProSe Per-Packet Reliability (PPPR) has been defined. With PPPR, it is now possible to consider a reliability that meets the defined requirements between 90% and 99.999%.

[0073] Examples include:

[0074] o Use the transmission pool to replicate packets by taking into account PPPR information

[0075] o In the case of (e.g. LTE V2X) Mode 3 based UEs, PPPR information may be provided by the UE to the eNB for resource reservation.

[0076] o In case of (e.g. LTE V2X) Mode 4 based UEs, the UE may sense based on PPPR or any combination of PPPR and CBR to allocate resources or for unlicensed access.

[0077] o Packets with low PPPR (ie requiring high reliability) can then be replicated on a shared resource pool or in the same mode but on different carriers (if the UE supports CA).

[0078] o During switchover or resource reselection, or even during normal operation (if allowed), if low PPPR and / or low PPPP value messages occur (requiring high reliability and low latency), the exception pool and the last (pre-)configured resource pool can be used for packet replication.

[0079] o Mapping of each network slice to PPPP and / or PPPR values, requiring defined latency and / or reliability respectively. This way, the RAN can ensure best fit processing to ensure the required latency and reliability for the respective network slice.

[0080] o By adding dummy data to the current resource pool, it is possible to limit the resource reservation for high reliability requests (i.e., low PPPR value) in the continuous resource pool.

[0081] o A new scheme based on PPPR is used in both Layer 2 and Layer 3 to enhance the existing QoS.

[0082] Examples help

[0083] o Enhance QoS in RAN by using a new PPPR-based approach to guarantee the required reliability

[0084] o Use of a priority scheme to assist packet duplication in V2X.

[0085] o Use PPPR / PPPP to evaluate packet sharing between Mode 3 and Mode 4 resource pools, i.e.

[0086] оWhen the PPPR threshold is reached, perform group replication on the shared resource

[0087] o If the PPPP threshold is reached, a different packet is transmitted on the selected pool

[0088] o Enhance the QoS of network slices by mapping slice-specific latency and reliability requirements to PPPP and PPPR, respectively, and ensuring the most appropriate processing in the RAN to meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Embodiments of the present invention are described herein with reference to the accompanying drawings.

[0090] Figure 1 A schematic diagram illustrating an example of a wireless communication system;

[0091] Figure 2 is similar to Figure 1 Schematic diagram of a cell 1061 in which the cell has two different overlapping networks, the networks including a macro cell network having the macro cell 1061 and a small cell network;

[0092] Figure 3 A schematic diagram showing a situation in which UEs communicating directly with each other are within the coverage of a base station;

[0093] Figure 4 shows a scenario in which UEs communicating directly with each other are outside the coverage of a base station, i.e. not connected to the base station;

[0094] Figure 5a A schematic block diagram of a transceiver for a wireless communication network according to an embodiment of the present invention is shown;

[0095] Figure 5b A schematic diagram showing an example of a replication scheme for Packet 1 (P1) having the highest reliability (lowest PPPR);

[0096] Figure 6 A schematic diagram showing inputs for decision making for packet replication;

[0097] Figure 7 A schematic diagram showing the mapping of network slices to PPPP / PPPR for RAB priority handling is shown;

[0098] Figure 8 A flow chart of a method for transmitting data packets between at least two transceivers communicating with each other using a sidelink resource pool in a wireless communication system according to an embodiment of the present invention is shown;

[0099] Fig. 9 A flow chart of a method for transmitting data packets between at least two transceivers communicating with each other using a sidelink resource pool in a wireless communication system according to another embodiment of the present invention is shown;

[0100] Fig.10 A flow chart showing a method for transmitting data packets between at least two transceivers communicating with each other using a sidelink resource pool in a wireless communication system according to another embodiment of the present invention is shown; and

[0101] Fig.11 An example of a computer system is shown, on which the units or modules described according to the method of the present invention and the steps of the method can be executed. DETAILED DESCRIPTION

[0102] In the following description, the same or equivalent elements or elements having the same or equivalent functions are denoted by the same or equivalent reference numerals.

[0103] In the following description, a number of details are set forth to provide a more thorough explanation of embodiments of the present invention. However, it will be clear to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other examples, well-known structures and devices are shown in block diagram form rather than in detail to avoid making embodiments of the present invention unclear. In addition, unless otherwise specifically noted, the features of the different embodiments described below may be combined with each other.

[0104] Figure 5a1 is a schematic block diagram of a transceiver 1091 (e.g., a UE of a device or vehicle) of a wireless communication system 100 according to an embodiment of the present invention. The transceiver 1091 is configured to communicate 111 with at least one other transceiver 1092 of the wireless communication system 100 using a sidelink resource pool of the wireless communication system 100. 12 .

[0105] Thus, the transceiver 1091 may be configured to send a data packet to other transceivers 1092 of the wireless communication system 100 on one of the sidelink resource pools of the wireless communication system 100, wherein the transceiver 1091 may be configured to: if a PPPR value associated with the data packet or with data contained in the data packet indicates high reliability, retransmit the data packet at least once on:

[0106] - on another sidelink resource pool in the sidelink resource pool of the wireless communication system 100,

[0107] - or on the same resource pool in a sidelink resource pool of a wireless communication system, but on a different carrier.

[0108] In the case of carrier aggregation (CA), the transceiver 1091 may also (e.g., alternatively or additionally) be configured to send data packets to other transceivers 1092 of the wireless communication system 100 on a component carrier (e.g., a first component carrier), wherein the transceiver may be configured to retransmit the data packet at least once on at least one other component carrier (e.g., a second component carrier different from the first component carrier) if a PPPR value associated with the data packet or with data contained in the data packet indicates high reliability.

[0109] In an embodiment, if the PPPR value indicates a reliability (or priority) equal to or higher than a predefined reliability or threshold, the transceiver 1091 may be configured to retransmit the data packet at least once.

[0110] Note that in some communication standards, a PPPR value of 1 may indicate the highest reliability (or priority), wherein a PPPR value of 8 may indicate the lowest priority.

[0111] In this case, if the PPPR value is equal to or less than a predefined reliability or threshold, such as 4 (or 3 or 2, or 1), the transceiver 1091 may be configured to retransmit the data packet at least once. Naturally, other predetermined reliability values ​​or thresholds may also be applied depending on the communication standard employed.

[0112] For example, in the case of 3GPP TS23.285, the predefined reliability value or threshold may be 1 to 8.

[0113] As an example, Figure 5a As indicated in , the communication system 100 may optionally include a base station such as a gNB or an eNB. Therefore, when transceivers 1091 and 1092 are located within the coverage of a base station, transceiver 1091 and, for example, other transceivers 1092 may be configured to communicate 1111 and 1112 with the base station. Transceivers 1091 and 1092 (or at least one of transceivers 1091 and 1092) may also be outside the coverage of a base station. In both cases, i.e. in the in-coverage mode and in the out-of-coverage mode, transceiver 1091 may be configured to communicate directly with other transceivers 1092 of the wireless communication system 100 (= sidelink communication), for example using a sidelink resource pool of the wireless communication system.

[0114] Depending on the wireless communication standard adopted, the in-coverage mode can be called LTE V2X Mode 3 or NR V2X Mode 1 or D2D Mode 1, where the out-of-coverage mode can be called V2X Mode 4 or NR V2X Mode 2 or D2D Mode 2.

[0115] Subsequently, an embodiment of the transceiver 1091 is described in further detail. Therefore, in the following description, reference is mainly made to the communication standard in which the in-coverage and out-of-coverage modes are respectively referred to as LTE V2X Modes 3 and 4 to illustrate the functions of the transceiver 1091 in the corresponding in-coverage and out-of-coverage modes. Of course, the following description is also applicable to other wireless communication standards in which the in-coverage and out-of-coverage modes are referred to as, for example, NR V2X Mode 1 and NR V2X Mode 2 or D2D Mode 1 and D2D Mode 2.

[0116] This concept is particularly relevant to V2X services that require highly reliable data transmission. The newly introduced PPPR indicates high reliability.

[0117] Currently, neither the range of PPPR values ​​nor the mapping to requested reliabilities is finalized. It is assumed that for a given specification, the same settings will apply to PPPP. However, if the final PPPR definition is different, the specification needs to be read with the final definition.

[0118] Thus, the PPPR (based on PPPP) ranges from 1 to 8, with 1 indicating the highest reliability and 8 indicating the lowest reliability.

[0119] The most common method to improve reliability is packet replication, which has been defined for V2X. However, the concept of how to interpret PPPR and a packet replication scheme based on PPPR is not easy to define, so the invention described below is made.

[0120] Example 1

[0121] Embodiments provide high priority data handling taking into account the reliability required for packet replication over shared / non-shared / exceptional resource pools using PPPR.

[0122] One of the main topics in the currently ongoing Release 15 V2X specification is the definition of resource pool sharing between Mode 3 and Mode 4. During the last RAN2#101 meeting, it was agreed to allow Mode 3 UEs to share Mode 4 UE resource pools. A prerequisite for Mode 3 UEs is to detect Mode 4 resource pools before data transmission to reduce the risk of interfering with Mode 4 UE data transmission.

[0123] Figure 5b A schematic diagram showing an example of a replication scheme for packet 1 (P1) having the highest reliability (lowest PPPR).

[0124] In detail, Figure 5b The schematic diagram shows the transmission of a data packet 300 on a sidelink resource pool 3021 of a wireless communication system, wherein the data packet 300 is retransmitted on another resource pool 3022 of the wireless communication system. Therefore, the ordinate represents frequency and the abscissa represents time. Figure 5b As shown, data packet 300 may be retransmitted once or twice on another resource pool 3022. Figure 5b In the figures, they are indicated by reference numerals 300(1) and 300(2).

[0125] like Figure 5b As shown, an embodiment uses a shared resource pool for packet replication 300(2) and 300(3) for V2X services that require high reliability of PPPR indication.

[0126] If high reliability is indicated for V2X data transmission on the sidelink, the replicated packets 300(2) and 300(3) may be transmitted on a shared or any type of non-shared resource pool.

[0127] In detail, the concept for using the resource pool includes:

[0128] 1. In case of Mode 3 UE 1091 and high reliability (indicated by PPPR), Mode 3 UE 1091 can Figure 5b The data 300 is sent on the resource pool 1 (3021) (e.g., the mode 3 resource pool) in Figure 5b The replicated packet 300(2) or 200(3) is sent to resource pool 2(3022) (e.g., a shared resource pool) in the example embodiment.

[0129] 2. In case of Mode 4 UE 1091 and high reliability (indicated by PPPR), Mode 4 UE 1091 can Figure 5bThe data 300 is sent on resource pool 1 (3021) (e.g., mode 4 resource pool) in Figure 5b The replicated packet 300(1) or 300(2) is sent to resource pool 2 (3022) (e.g., a shared resource pool) in the example embodiment.

[0130] 3. Mode 3 or Mode 4, in case of RLF / no sensing information available or handover, after triggering the high reliability indication (indicated by PPPR) threshold, UE 1091 chooses to allocate resources in the old version abnormal resource pool (e.g. Figure 5b The resources transferred from resource pool 1 (3001) in the example are copied to the (pre-)configured resources or the last used resources (e.g. Figure 5b On resource pool 2 (3002) in.

[0131] 4. Mode 3 or Mode 4, in the case of carrier aggregation (CA), after triggering the high reliability indication (indicated by PPPR) threshold, UE 1091 selects another CC-ii (e.g. Figure 5b resource pool 2 (3022) in component carrier #i (CC-i) (e.g. Figure 5b Resources transmitted on resource pool 1 (3021) in.

[0132] 5. The duplicate data packets 300(1) and 200(2) may be sent one or more times on any of the following:

[0133] Shared resource pool or

[0134] Abnormal resource pool

[0135] On the associated Mode 3 / 4 resource pool, or

[0136] On any combination of shared, affinity mode 3 or 4, and / or exception resource pools.

[0137] The following table describes Figure 5b All possible scenarios for resource pools 1 and 2:

[0138]

[0139] Figure 6 A schematic diagram showing inputs for decision making for packet replication.

[0140] In detail, the concept for the packet replication solution includes:

[0141] 1. The decision about the replicated multiple transmissions 300(2) and 300(3) depends on the PPPR value (representing the requested reliability) and may additionally take into account the channel load ( Figure 6The channel load can be inferred from the SL-CBR (SL-CBR = sidelink channel busy rate).

[0142] 2. If both PPPP and SL-CBR are considered, the packet replication decision can be:

[0143] If (SL-CBR>SL-CBR threshold)

[0144] If (PPPR>PPPR threshold)

[0145] Copy group;

[0146] 3. Optionally, depending on the PPPR or SL-CBR and PPPR combination, a multiplication factor may be selected to send the same packets 300, 300(2) and 300(3) as many times as given by the multiplication factor.

[0147] 4. If the packet is sent more than 300 times, there may be a fixed offset for the next packet transmission 300(2) and 300(3) using periodic transmissions, or there may be random bursts for the packet transmissions (see Figure 5b ).

[0148] 5. The replicated packets 300(2), 300(3) may be sent on the shared pool in any of the following cases:

[0149] • Within the same time period as the "original" packet 300 (which means that sensing may not have been performed). This may apply if low latency is indicated, for example by lower PPPP.

[0150] Defer by a defined or random offset in the current or next secondary resource pool.

[0151] • In one of the contiguous secondary resource pools, this may be applicable if low latency is not required. This may ensure that the sensing mechanism is used to possibly avoid interfering with data transmissions of other UEs 1092 (and thus increase the likelihood of successful data transmission).

[0152] 6. How the decision on packet duplication / multiplication factor is made based on PPPR or PPPR / CL-CBR combination can be hard-coded or configurable. An example of a mapping based on a configurable threshold is illustrated in this list (see clause 2). Additionally, a SL_CBR-PPPR table may be applied [2] - similar to the SL-CBR-PPPP-TxConfigList information element of PPPP to identify whether packet duplication should be performed. Using this list, information can also be derived, i.e. how often packets should be sent. A freely configurable or predefined or hard-coded table can be used to provide a mapping of PPPR values ​​to packet duplication. NOTE: In mode 3, packet duplication will be controlled by the base station using, for example, RRC signaling or MAC CE (control element) or both.

[0153] Example 2

[0154] In an embodiment, PPPR information is used for network slicing.

[0155] Starting from Release 15, the new concept of network slicing also applies to the RAN.

[0156] Figure 7 A schematic diagram showing the mapping of network slices to PPPP / PPPR for RAB (Radio Access Bearer) priority handling.

[0157] Each network slice typically represents a service, such as mobile broadband or V2X with a defined set of parameters. The detailed handling of network slices in the RAN has not yet been defined.

[0158] In order to ensure the latency and reliability required by each network slice, the latency / reliability requested by each network slice can be mapped to PPPP and PPPR values ​​respectively.

[0159] This can apply to at least any V2X-related service slice, but may not be limited to it.

[0160] Using the already defined mechanisms for PPPP and the new scheme for PPPR (as proposed in Examples 1 and 2), or any combination of these two schemes, each network slice can be processed in the RAN in a manner that ensures the requested reliability and latency.

[0161] How each network slice is mapped to PPPP and / or PPPR may be hard-coded or configurable.

[0162] This mapping can be provided using a freely configurable table, a predefined table, or a hard-coded table.

[0163] Alternatively, thresholds may be used to define the latency / reliability of each service slice to map to the most appropriate PPP and / or PPPR, respectively.

[0164] Example 3

[0165] In an embodiment, the PPPR value is used to allow resource reservation in a continuous resource pool by adding dummy data in the current resource pool (SCI).

[0166] In addition to packet duplication, high reliability (indicated by low PPPR) can also be ensured by resource reservation of Mode 4 UEs in the next resource pool.

[0167] The idea here is to add dummy data (eg, to SCI) in the Mode 4 resource pool to indicate the resource pool usage for sensing Mode 3 UEs (trying to share using the Mode 4 resource pool) and other Mode 4 UEs.

[0168] As a result, the sensing UE will not send data in the contiguous Mode 4 resource pool. Therefore, the Mode 4 UE adding dummy data (e.g. in the SCI) will increase the reliability of the critical (highly reliable) contiguous resource pool, i.e. increase the probability of successfully transmitting data and avoid collisions with data packets of other Mode 3 or 4 UEs.

[0169] However, this mechanism may be strictly limited to services requiring very high reliability (low PPPR), which require the transmission of defined data (e.g., location or other important details in emergency situations) to avoid wasting resources.

[0170] The embodiments described herein may be implemented, for example, in V2X, D2D, mMTC, URLLC and critical communications.

[0171] Figure 8 A flow chart of a method 400 for transmitting data packets between at least two transceivers communicating with each other using a sidelink resource pool (e.g., a mode 3 resource pool, a mode 4 resource pool, a shared resource pool, a non-shared resource pool, or an abnormal resource pool) of a wireless communication system is shown. The method 400 includes step 402: transmitting a data packet to other transceivers of the wireless communication system on one of the sidelink resource pools of the wireless communication system. In addition, the method 400 includes step 404: if a PPPR value associated with the data packet or data contained in the data packet indicates a high reliability, retransmitting the data packet at least once on another sidelink resource pool of the sidelink resource pool of the wireless communication system.

[0172] Fig. 9A flow chart of a method 410 for transmitting a data packet between at least two transceivers communicating with each other in a wireless communication system is shown. The method 410 includes a step 412 of transmitting a data packet to other transceivers of the wireless communication system on a component carrier. In addition, the method 410 includes a step 414 of retransmitting the data packet at least once on at least one other component carrier if a PPPR value associated with the data packet or data contained in the data packet indicates high reliability.

[0173] Fig.10 A flow chart of a method 420 for transmitting a data packet between at least two transceivers in a wireless communication system that communicate with each other using a sidelink resource pool of the wireless communication system is shown. The method 420 includes a step 422 of transmitting a data packet to other transceivers of the wireless communication system on one of the sidelink resource pools of the wireless communication system. In addition, the method 420 includes a step 424 of retransmitting the data packet at least once if a PPPR value associated with the data packet or with data contained in the data packet indicates high reliability over:

[0174] - on another sidelink resource pool in the sidelink resource pool of the wireless communication system,

[0175] - or, in case of carrier aggregation, on another component carrier,

[0176] - or on the same resource pool in a sidelink resource pool of a wireless communication system, but on a different carrier.

[0177] Although certain aspects of the described concepts have been described in the context of an 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.

[0178] The various elements and features of the present invention can be implemented in hardware using analog and / or digital circuits, in software using one or more general or special purpose processors to execute instructions, or as a combination of hardware and software. For example, embodiments of the present invention can be implemented in the environment of a computer system or another processing system. Fig.11An example of a computer system 350 is shown. The units or modules and the steps of the methods performed by these units can be executed on one or more computer systems 350. The computer system 350 includes one or more processors 352, such as a dedicated or general-purpose digital signal processor. The processor 352 is connected to a communication infrastructure 354 such as a bus or network. The computer system 350 includes a main memory 356 (e.g., random access memory (RAM)) and a secondary memory 358 (e.g., a hard drive and / or a removable storage drive). The secondary memory 358 can allow computer programs or other instructions to be loaded into the computer system 350. The computer system 350 may further include a communication interface 360 ​​to allow software and data to be transmitted between the computer system 350 and external devices. The communication can take the form of electronic, electromagnetic, optical or other signals that can be processed by the communication interface. The communication can use wires or cables, optical fibers, telephone lines, cellular phone links, RF links and other communication channels 362.

[0179] The terms "computer program medium" and "computer readable medium" are generally used to refer to tangible storage media, such as a removable storage unit or a hard disk installed in a hard drive. These computer program products are means for providing software to the computer system 350. The computer program, also referred to as computer control logic, is stored in the main memory 356 and / or the secondary memory 358. The computer program may also be received via the communication interface 360. The computer program, when executed, enables the computer system 350 to implement the present invention. In particular, the computer program, when executed, enables the processor 352 to implement the process of the present invention, such as any method described herein. Therefore, such a computer program may represent a controller of the computer system 350. In the case of using software to implement the present disclosure, the software may be stored in a computer program product and loaded into the computer system 350 using a removable storage drive, an interface (e.g., the communication interface 360), etc.

[0180] The implementation can be performed in hardware or software using a digital storage medium (e.g., cloud storage, floppy disk, DVD, Blu-ray, CD, ROM, PROM, EPROM, EEPROM, or flash memory) having electronically readable control signals stored thereon, which cooperate (or can cooperate) with a programmable computer system to perform the corresponding method. Therefore, the digital storage medium can be computer readable.

[0181] Some embodiments according to the invention comprise a data carrier having electronically readable control signals, which are capable of cooperating with a programmable computer system, such that one of the methods described herein is performed.

[0182] Generally, embodiments of the present invention can be implemented as a computer program product with a program code, which is operable to perform one of the methods when the computer program product runs on a computer.The program code may, for example, be stored on a machine readable carrier.

[0183] Other embodiments comprise a computer program for performing one of the methods described herein, stored on a machine readable carrier. In other words, therefore, an embodiment of the inventive method is a computer program having a program code for performing one of the methods described herein, when the computer program runs on a computer.

[0184] Therefore, another embodiment of the method of the present invention is a data carrier (or digital storage medium, or computer-readable medium) comprising a computer program recorded thereon for performing one of the methods described herein. Therefore, another embodiment of the method of the present invention is a data stream or signal sequence representing a computer program for performing one of the methods described herein. The data stream or signal sequence can, for example, be configured to be transmitted via a data communication connection, such as via the Internet. Another embodiment includes a processing device, such as a computer or a programmable logic device, which is configured to or suitable for performing one of the methods described herein. Another embodiment includes a computer having a computer program for performing one of the methods described herein installed on the computer.

[0185] In some embodiments, a programmable logic device (e.g., a field programmable gate array) may be used to perform some or all of the functions of the method described herein. In some embodiments, a field programmable gate array may collaborate with a microprocessor to perform one of the methods described herein. Typically, the method is preferably performed by any hardware device.

[0186] The embodiments described above are only used to illustrate the principles of the present invention. It should be understood that modifications and variations of the arrangements and details described herein are clear to those skilled in the art. Therefore, the present invention is intended to be limited only by the scope of the appended patent claims, and is not limited by the specific details given by the description and explanation of the embodiments herein.

[0187] References

[0188] [1]3GPP TS 36.213 Evolved Universal Terrestrial Radio Access (E-UTRA);

[0189] Physical layer procedures; V14.5.0

[0190] [2]3GPP TS 36.331 Evolved Universal Terrestrial Radio Access(E-UTRA)-Radio Resource Control(RRC);V14

[0191] [3]3GPP TS 36.211 Evolved Universal Terrestrial Radio Access(E-UTRA);

[0192] Physical Channels and Modulation,v 14.3.0

[0193] [4]3GPP TS 36.212 Evolved Universal Terrestrial Radio Access(E-UTRA);

[0194] Multiplexing and channel coding,v 14.3.0

[0195] [5]3GPP TS 36.321 Evolved Universal Terrestrial Radio Access(E-UTRA);

[0196] Medium Access Control(MAC)protocol specification,v 14.3.0

[0197] [6]EP 3 273 634 A1 Improved support of Quality of Service for V2XTransmissions

[0198] [7]TDoc R2-18xxxx:Email discussion report on[101#34][LTE / 5GC]Slicing,(ongoing),planned for WG2#101Bis meeting,April 2018

[0199] [8]3GPP TR 23.285 Architecture enhancements for V2X services;V15.1.0

[0200] [9]3GPP TS 36.300 Packet Data Convergence Protocol(PDCP) specification; V15.3.0

[0201]

[10] TDoc R2-18xxxx: draft Report from [101#72][LTE / V2X] Packet duplication, (ongoing), planned for WG2#101Bis meeting, April 2018

[0202]

[11] 3GPP TS 36.323 Packet Data Convergence Protocol(PDCP) specification, V15.1.0

[0203]

[12] 3GPP TS 36.321 Medium Access Control(MAC) protocol specification, V15.3.0

[0204]

[13] 3GPP TS 38.885 Study on NR Vehicle-to-Everything(V2X), V2.0.0

[0205]

[14] 3GPP TS 23.501 System architecture for the 5G System(5GS)

[0206]

[15] 3GPP TR 23.786 Study on architecture enhancements for the Evolved Packet System(EPS) and the 5G System(5GS) to support advanced V2X services

[0207]

[16] 3GPP TS 23.287 Architecture enhancements for 5G System(5GS) to support Vehicle-to-Everything(V2X) services

[0208] Abbreviations

[0209] BS Base Station

[0210] CBR Channel Busy Rate

[0211] D2D Device to Device

[0212] EN Emergency Notice

[0213] EP Exception Pool

[0214] eNB Evolved Node B (base station)

[0215] FDM Frequency Division Multiplexing

[0216] LTE Long Term Evolution

[0217] PC5 Interface for D2D communication using sidelink channel

[0218] PPPP ProSe per-packet priority

[0219] PPPR ProSe per-packet reliability

[0220] PRB Physical Resource Block

[0221] ProSe Proximity Services

[0222] RA Resource Allocation

[0223] SCI side chain control information

[0224] SL Sidechain

[0225] sTTI short transmission time interval

[0226] TDM Time Division Multiplexing

[0227] TDMA Time Division Multiple Access

[0228] UE User Entity (User Terminal or User Equipment)

[0229] URLLC Ultra-Reliable Low Latency Communications

[0230] V2V Vehicle to Vehicle

[0231] V2I Vehicle to Infrastructure

[0232] V2P Vehicle to Pedestrian

[0233] V2N Vehicle to Network

[0234] V2X vehicle to all, namely V2V, V2I, V2P, V2N.

Claims

1. A transceiver (1091) for a wireless communication system (100), comprising: a memory having instructions stored therein, and At least one processor is configured to execute the instructions so that the transceiver (1091): communicating with at least one other transceiver (1092) of the wireless communication system (100) using a side chain resource pool (3021, 3022) of the wireless communication system (100), sending a data packet (300) to the other transceiver (1092) of the wireless communication system (100) on one of the side link resource pools (3021, 3022) of the wireless communication system (100), If a PPPR value associated with the data packet (300) or with data contained in the data packet (300) indicates high reliability, the data packet (300) is retransmitted at least once on another sidelink resource pool (3022) of the sidelink resource pools of the wireless communication system (100).

2. The transceiver (1091) according to claim 1, The number of retransmissions of the data packet (300) depends on the PPPR value.

3. The transceiver (1091) according to claim 1, The processor is configured to execute the instructions to cause the transceiver (1091) to obtain the PPPR value associated with the data packet (300) or with data contained in the data packet (300).

4. The transceiver (1091) according to claim 1, The side chain resource pools (3021, 3022) of the wireless communication system (100) are at least two of a mode 3 resource pool, a mode 4 resource pool, a shared resource pool, a non-shared resource pool or an abnormal resource pool.

5. The transceiver (1091) according to claim 1, wherein the PPPR value is 1 to 8; A PPPR value of 1 indicates the highest reliability, and a PPPR value of 8 indicates the lowest reliability.

6. The transceiver (1091) according to claim 1, The processor is configured to execute the instructions to cause the transceiver (1091) to: retransmit the data packet (300) at least once if the PPPR value exceeds a predetermined threshold.

7. The transceiver (1091) according to claim 1, The processor is configured to execute the instructions to enable the transceiver (1091): if the reliability indicated by the PPPR value is equal to or higher than a predefined reliability, retransmit the data packet (300) at least once.

8. The transceiver (1091) according to claim 1, wherein the transceiver (1091) is served by a central transceiver of the wireless communication system (100), wherein the processor is configured to execute the instructions to cause the transceiver (1091) to operate in V2X Mode 3 in which the central transceiver performs scheduling of resources for communicating with at least one other transceiver (1092), wherein the processor is configured to execute the instructions to enable the transceiver (1091) to send a data packet (300) on a V2X mode 3 resource pool in a sidelink resource pool (3021, 3022) of the wireless communication system (100); and The processor is configured to execute the instructions to enable the transceiver (1091) to retransmit the data packet (300) at least once on a V2X mode 4 resource pool, a shared resource pool, a non-shared resource pool or an abnormal resource pool in a sidelink resource pool of the wireless communication system.

9. The transceiver (1091) according to claim 1, wherein the transceiver (1091) is served by a central transceiver of the wireless communication system (100), wherein the processor is configured to execute the instructions to cause the transceiver (1091) to operate in NR V2X Mode 1 in which scheduling of resources for communication with at least one other transceiver (1092) is performed by the central transceiver, wherein the processor is configured to execute the instructions to cause the transceiver (1091) to transmit a data packet (300) on an NR V2X Mode 1 resource pool in a sidelink resource pool of the wireless communication system, and The processor is configured to execute the instructions to cause the transceiver (1091) to retransmit the data packet (300) at least once on another or the same NR V2X mode 1 resource pool, NR V2X mode 2 resource pool, shared resource pool, non-shared resource pool or exception resource pool in the sidelink resource pool of the wireless communication system.

10. The transceiver (1091) according to claim 1, wherein the transceiver (1091) is served by a central transceiver of the wireless communication system (100), wherein the processor is configured to execute the instructions to cause the transceiver (1091) to operate in D2D mode 1 in which the central transceiver performs scheduling of resources for communication with at least one other transceiver (1092), wherein the processor is configured to execute the instructions to enable the transceiver (1091) to send a data packet (300) on a D2D mode 1 resource pool in a sidelink resource pool of the wireless communication system, and The processor is configured to execute the instructions to enable the transceiver (1091) to retransmit the data packet (300) at least once on another or the same D2D mode 1 resource pool, D2D mode 2 resource pool, shared resource pool, non-shared resource pool or abnormal resource pool in the sidelink resource pool of the wireless communication system.

11. The transceiver (1091) according to claim 1, wherein the processor is configured to execute the instructions to cause the transceiver (1091) to operate in V2X Mode 4 in which the transceiver (1091) is configured to autonomously schedule resources for sidelink communications; wherein the processor is configured to execute the instructions to enable the transceiver (1091) to send a data packet (300) on a V2X mode 4 resource pool in a sidelink resource pool (3021, 3022) of the wireless communication system (100); and The processor is configured to execute the instructions to enable the transceiver (1091) to retransmit the data packet (300) at least once on a V2X mode 3 resource pool, a shared resource pool, a non-shared resource pool or an abnormal resource pool in a sidelink resource pool of the wireless communication system.

12. The transceiver (1091) according to claim 1, wherein the processor is configured to execute the instructions to cause the transceiver (1091) to operate in NR V2X Mode 2, wherein the processor is configured to execute the instructions to cause the transceiver (1091) to autonomously schedule resources for sidelink communication; wherein the processor is configured to execute the instructions to cause the transceiver (1091) to transmit a data packet (300) on an NR V2X Mode 2 resource pool in a sidelink resource pool (3021, 3022) of the wireless communication system (100); and The processor is configured to execute the instructions to cause the transceiver (1091) to retransmit the data packet (300) at least once on another or the same NR V2X mode 2 resource pool, NR V2X mode 1 resource pool, shared resource pool, non-shared resource pool or exception resource pool in the sidelink resource pool of the wireless communication system.

13. The transceiver (1091) according to claim 1, wherein the processor is configured to execute the instructions to enable the transceiver (1091) to operate in D2D mode 2, wherein the processor is configured to execute the instructions to enable the transceiver (1091) to autonomously schedule resources for sidelink communication; wherein the processor is configured to execute the instructions to enable the transceiver (1091) to send data packets on a D2D mode 2 resource pool in a sidelink resource pool (3021, 3022) of the wireless communication system (100); and The processor is configured to execute the instructions to cause the transceiver (1091) to retransmit the data packet (300) at least once on another or the same D2D mode 2 resource pool, D2D mode 1 resource pool, shared resource pool, non-shared resource pool or abnormal resource pool in the sidelink resource pool of the wireless communication system.

14. The transceiver (1091) according to claim 1, The processor is configured to execute the instructions to enable the transceiver (1091) to send the data packet (300) on an abnormal resource pool in the sidelink resource pool of the wireless communication system (100) in the event of RLF / no sensing information or handover availability, and to retransmit the data packet at least once on a previously used resource pool in the sidelink resource pool of the wireless communication system (100).

15. The transceiver (1091) according to claim 1, The processor is configured to execute the instructions to enable the transceiver (1091) to send the data packet (300) on a component carrier in the case of carrier aggregation, and to retransmit the data packet at least once on another component carrier.

16. A transceiver (1091) for a wireless communication system (100), comprising: a memory having instructions stored therein, and At least one processor is configured to execute the instructions so that the transceiver (1091): communicating with at least one other transceiver (1092) of the wireless communication system (100), sending a data packet (300) to the other transceiver (1092) of the wireless communication system (100) on a component carrier, If a PPPR value associated with the data packet (300) or with data contained in the data packet (300) indicates high reliability, the data packet (300) is retransmitted at least once on at least one other component carrier.

17. The transceiver (1091) according to claim 16, The processor is configured to execute the instructions to cause the transceiver (1091) to: retransmit the data packet (300) at least once if the reliability indicated by the PPPR value is equal to or higher than a predefined reliability or threshold.

18. The transceiver (1091) according to claim 16, The transceiver (1091) is served by a central transceiver of the wireless communication system, wherein the processor is configured to execute the instructions to cause the transceiver (1091) to operate in LTE V2X Mode 3, NR V2X Mode 1 or D2D Mode 1 in which the central transceiver performs scheduling of resources for communicating with at least one other transceiver (1092).

19. The transceiver (1091) according to claim 16, The processor is configured to execute the instructions to enable the transceiver (1091) to operate in V2X mode 4, NR V2X mode 2 or D2D mode 2, wherein the processor is configured to execute the instructions to enable the transceiver (1091) to autonomously schedule resources for sidelink communication.

20. The transceiver according to claim 16, The processor is configured to execute the instructions to cause the transceiver (1091) to operate using carrier aggregation.

21. A transceiver (1091) for a wireless communication system (100), comprising: a memory having instructions stored therein, and At least one processor is configured to execute the instructions so that the transceiver (1091): communicating with at least one other transceiver (1091) of the wireless communication system (100) using a sidelink resource pool of the wireless communication system (100), sending a data packet (300) to the other transceiver (1092) of the wireless communication system (100) on one of the side link resource pools (3021, 3022) of the wireless communication system (100), If a PPPR value associated with the data packet (300) or with data contained in the data packet (300) indicates high reliability, retransmitting the data packet (300) at least once over: - on another side chain resource pool in the side chain resource pools (3021, 3022) of the wireless communication system (100), - or, in case of carrier aggregation, on another component carrier, - or on the same resource pool in the sidelink resource pools (3021, 3022) of the wireless communication system (100), but on different carriers.

22. The transceiver (1091) according to claim 21, The processor is configured to execute the instructions to cause the transceiver (1091) to: retransmit the data packet (300) at least once if the reliability indicated by the PPPR value is equal to or higher than a predefined reliability or threshold.

23. The transceiver (1091) according to claim 21, The transceiver (1091) is served by a central transceiver of the wireless communication system (100), wherein the processor is configured to execute the instructions so that the transceiver (1091) is configured to operate in LTE V2X Mode 3, NR V2X Mode 1 or D2D Mode 1 in which the central transceiver performs scheduling of resources for communicating with at least one other transceiver (1092).

24. The transceiver (1091) according to claim 21, The processor is configured to execute the instructions to enable the transceiver (1091) to operate in LTE V2X Mode 4, NRV2X Mode 2 or D2D Mode 2, wherein the processor is configured to execute the instructions to enable the transceiver (1091) to autonomously schedule resources for sidelink communication.

25. A method (400) for transmitting data packets between at least two transceivers (1091, 1092) in a wireless communication system (100) that communicate with each other using a sidelink resource pool (3021, 3022) of the wireless communication system (100), the method comprising: Sending (402) a data packet (300) to other transceivers (1092) of the wireless communication system (100) on one of the sidelink resource pools (3021, 3022) of the wireless communication system (100); and If a PPPR value associated with the data packet or with data contained in the data packet indicates high reliability, the data packet (300) is retransmitted (404) at least once on another sidelink resource pool (3021, 3022) of the wireless communication system (100).

26. A method (410) for transmitting data packets between at least two transceivers (1091, 1092) communicating with each other in a wireless communication system (100), the method comprising: transmitting (412) a data packet (300) from the transceiver (1091) to other transceivers (1092) of the wireless communication system (100) on a component carrier, If a PPPR value associated with the data packet (300) or with data contained in the data packet (300) indicates high reliability, the data packet (300) is retransmitted (414) at least once on at least one other component carrier.

27. A method (420) for transmitting data packets between at least two transceivers (1091, 1092) in a wireless communication system (100) that communicate with each other using a sidelink resource pool (3021, 3022) of the wireless communication system (100), the method comprising: Transmitting (422) a data packet (300) from one wireless transceiver (1091) to other wireless transceivers (1091) of the wireless communication system (100) on one of the sidelink resource pools (3021, 3022) of the wireless communication system (100); and If a PPPR value associated with the data packet (300) or with data contained in the data packet (300) indicates high reliability, retransmitting (424) the data packet (300) at least once over: - on another side chain resource pool in the side chain resource pools (3021, 3022) of the wireless communication system (100), - or, in case of carrier aggregation, on another component carrier, - or on the same resource pool in the sidelink resource pools (3021, 3022) of the wireless communication system (100), but on different carriers.

28. A computer-readable storage medium storing a computer program for executing the method according to one of claims 25 to 27 when the computer program is run on a computer or a microprocessor.

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