Improved protection of Mode 3 V2X UEs in ITS bands

Abstract

A method for vehicle-to-everything (V2X) communication in a wireless network is provided. The method includes a base station sending a resource grant message to a first user equipment (UE), the resource grant message identifying available resources for V2X communication conducted by the first UE. The method also includes the base station receiving a feedback report from a second UE, the feedback report indicating quality of the V2X communication conducted by the first UE.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. application No. 15 / 989,755, filed on May 25, 2018, entitled “IMPROVED PROTECTION OF MODE 3 V2X UE IN ITS BAND,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates generally to systems and methods for wireless communications and, in particular embodiments, to systems and methods for improved protection in Mode 3 vehicle-to-everything (V2X) communications. Background Art

[0004] Support for vehicle-to-everything (V2X) and vehicle-to-vehicle (V2V) communications in Long Term Evolution (LTE) and Fifth Generation (5G) wireless technologies has been documented in the 3rd Generation Partnership Project (3GPP), specifically Releases 14 and 15 of the 3GPP specifications. With Release 16, research has begun on V2X for NR, and it is widely expected that V2X will be designated for different frequency bands in Rel-16 / 17. Furthermore, various international committees have allocated spectrum for various technologies (e.g., NR, LTE, etc.) to support intelligent transportation system (ITS) applications. For example, the European Commission has reserved a portion of the 5.9 gigahertz (GHz) band as an ITS band for V2X and V2V communications.

[0005] In Release 15 of the 3GPP specifications, work is underway to standardize different scheduling techniques for V2X communications. One scheduling technique, Mode 3, uses the base station to schedule resources for V2X communications conducted by UEs. Another scheduling technique, Mode 4, relies on the UE to allocate resources for V2X communications independently of the base station after sensing the V2X channel. In V2X communications of UEs scheduled by base stations, and in environments where different radio technologies and scheduling techniques coexist, techniques are needed to reduce resource interference and increase signal reliability between UEs. Once NR V2X is standardized, the equivalent of Mode 3 (UEs scheduled by base stations) and Mode 4 (UEs autonomously selecting resources) can be standardized, and it is expected that there will be deployments where UEs with both operating modes are active in the same space. Summary of the Invention

[0006] Technical advantages are generally achieved by embodiments of the present disclosure, which describe systems and methods for improved protection of Mode 3 V2X communications.

[0007] According to one embodiment, a method for V2X communication in a wireless network is provided. In this embodiment, the method includes a base station sending a resource grant message to a first user equipment (UE), the resource grant message identifying available resources for V2X communication conducted by the first UE. The method also includes the base station receiving a feedback report from a second UE, the feedback report indicating the quality of the V2X communication conducted by the first UE. In one example, the method further includes: the base station sending a second resource grant message to the first UE based on the feedback report. The second resource grant message identifies available resources for a second V2X communication conducted by the first UE. Optionally, in this example or another example, a subset of data transmitted in a packet of the second V2X communication includes a subset of data transmitted in a packet of the first V2X communication. Optionally, in any of the above examples or another example, the method further includes: the base station receiving perception information from the first UE, the perception information indicating available resources within a time-limited perception window. Optionally, in any of the above examples or another example, the perception information includes a signal quality parameter from the first UE. The signal quality parameter includes a measurement of at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), received signal strength indication (RSSI), signal-to-interference ratio (SIR), signal-to-noise plus interference ratio (SINR), or frame rate error (FER). Optionally, in any one of the above examples or another example, the perception information includes a set of potential candidate resources identified by the first UE. Optionally, in any one of the above examples or another example, the base station sends a resource authorization message to the first UE in a physical downlink control channel (PDCCH). Optionally, in any one of the above examples or another example, the base station sends the resource authorization message using a downlink control information (DCI) format 5A message type. Optionally, in any one of the above examples or another example, the method further includes: the base station sends a configuration request message to one or more UEs, and the configuration request message configures each of the one or more UEs to monitor the quality of the V2X communication of the first UE.Optionally, in any one of the above examples or another example, the configuration request message further includes: configuring each of the one or more UEs to send a corresponding feedback report to the base station, the corresponding feedback report indicating the quality of the V2X communication of the first UE. Optionally, in any one of the above examples or another example, the configuration request message includes at least one of the following: a DCI message, a media access control (MAC) control element message, or a radio resource control (RRC) message. Optionally, in any one of the above examples or another example, the configuration request message includes a set of coordinates and a radius for identifying a geographical area. Optionally, in any one of the above examples or another example, the available resources for V2X communication include available resources in the ITS frequency band. Optionally, in any one of the above examples or another example, a resource authorization message is sent to the first UE on the cellular frequency band. Optionally, in any one of the above examples or another example, the V2X communication is a sideline transmission. Optionally, in any one of the above examples or another example, the V2X communication includes: the first UE sending a control channel in a sidelink control information (SCI) message on a physical sidelink control channel (PSCCH) to surrounding UEs. The V2X communication also includes the first UE sending a data message to surrounding UEs on a physical sidelink shared channel (PSSCH). Optionally, in any one of the above examples or another example, the SCI message includes a UE scheduling information bit that identifies a scheduling type of the first UE. The scheduling type is a base station-scheduled UE or an autonomously scheduled UE.

[0008] According to another embodiment, a method for V2X communication in a wireless network is provided. In this embodiment, the method includes a UE receiving a configuration indication that configures the UE to detect the signal quality of the V2X communication. The method also includes the UE sending a feedback report to the base station. The feedback report indicates the quality of the V2X communication in the wireless network. In one example, the interface for V2X communication in the wireless network is a sidelink connection, and the quality of the sidelink connection is evaluated using a reference signal (RS) on a PSSCH of the sidelink connection. Optionally, in such an example or another example, the resources used for V2X communication include resources in an ITS frequency band, and the feedback report includes channel-state information (CSI). Optionally, in any one of the above examples or another example, the method also includes: the UE sending a feedback report to the base station using a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a random access channel (RACH). Optionally, in any one of the above examples or another example, the feedback report includes a signal quality parameter, and the signal quality parameter includes a measurement of at least one of the following: RSRP, RSRQ, RSSI, SIR, SINR, or FER. Optionally, in any one of the above examples or another example, the configuration indication is a probe request from the base station. The probe request indicates resources to be monitored or a second UE to be monitored in V2X communication. Optionally, in any one of the above examples or another example, the probe request includes at least one of the following: a DCI message, a MAC control element message, or an RRC message. Optionally, in any one of the above examples or another example, the method further includes: the UE receiving a resource grant message from the base station. The resource grant message identifies available resources for sending the feedback report. Optionally, in any one of the above examples or another example, sending the feedback report further includes sending it on an uplink (UL) control channel. The feedback report includes an identifier of the second UE, which is scheduled by the base station for V2X communication. Optionally, in any one or another of the above examples, in response to the UE not receiving a message on a sidelink connection for V2X communication extended to the UE, sending the feedback report. Optionally, in any one or another of the above examples, the feedback report includes an indicator for indicating whether the message was received in the V2X communication.Optionally, in any one of the above examples or another example, the feedback report includes an indicator for indicating whether the message received by the UE in the V2X communication corresponds to a message sent by a UE scheduled by the base station or a message sent from an autonomously scheduled UE. Optionally, in any one of the above examples or another example, the second UE is configured using semi-persistent scheduling (SPS), and the base station schedules the second UE for V2X communication. The UE sends a feedback report after each receipt of a single message from the second UE, or sends a feedback report only in response to the first receipt of a message from the second UE. Optionally, in any one of the above examples or another example, receiving the configuration indication also includes: the UE receiving a resource authorization message from the base station. The resource authorization message identifies the available resources to the second UE for V2X communication, and each of the above UEs shares a shared physical downlink control channel search space and a radio network temporary identifier (RNTI).

[0009] According to another embodiment, a base station in a wireless network is provided. The base station includes a non-transitory memory storage including instructions and a processor in communication with the non-transitory memory storage. The processor executes the instructions to send a resource grant message to a first UE. The resource grant message identifies available resources for vehicle-to-everything (V2X) communication conducted by the first UE in the wireless network. The processor also executes instructions to receive a feedback report from a second UE. The feedback report indicates the quality of the V2X communication in the wireless network. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which:

[0011] Figure 1 is a diagram of an embodiment of a wireless communication network;

[0012] Figure 2 is a diagram of an embodiment of vehicle-to-everything (V2X) communication for base station-scheduled user equipment (UE) (mode 3);

[0013] Figure 3 FIG3 is a diagram of an embodiment of a communication sequence for a UE scheduled by a base station to perform V2X communication (mode 3);

[0014] Figure 4 is a diagram of an embodiment of V2X communication for autonomously scheduled UEs (Mode 4);

[0015] Figure 5 is a diagram of an embodiment of a communication sequence for UE autonomous scheduling for V2X communication (mode 4);

[0016] Figure 6 is a diagram of an embodiment of a V2X communication network (Mode 3 and Mode 4);

[0017] Figure 7 is a diagram of an embodiment of a method for reselecting in response to resource interference between neighboring UEs;

[0018] Figure 8 This is a diagram of UE continuously losing packets in V2X communication;

[0019] Figure 9 is a flow chart of an embodiment of a method for V2X communication performed by a base station;

[0020] Figure 10 is a flow chart of an embodiment of a method for V2X communication performed by a transmitting UE;

[0021] Figure 11 is a flow chart of an embodiment of a method for V2X communication performed by one or more probing UEs;

[0022] Figure 12 is a flow chart of an embodiment of a method performed by a base station for scheduling a UE for V2X communication using a pseudo-random allocation;

[0023] Figure 13 is a flow chart of an embodiment of a method for scheduling a UE for V2X communication by a base station using pseudo-random allocation, performed by the UE;

[0024] Figure 14 is a diagram of an embodiment of a processing system; and

[0025] Figure 15 is a diagram of an embodiment of a transceiver. DETAILED DESCRIPTION

[0026] The present disclosure provides many applicable inventive concepts that can be embodied in a variety of different contexts. The detailed description is only an illustration of a specific configuration and does not limit the scope of the claimed embodiments.

[0027] As used herein, the term “vehicle-to-everything (V2X) communication” refers to wireless communication between a vehicle and another device, including (but not limited to) uplink and / or downlink transmission between a vehicle and a base station, vehicle-to-vehicle (V2V) communication between two or more vehicles, vehicle-to-infrastructure (V2I) communication between a vehicle and road infrastructure units (such as traffic lights, toll collection devices, etc.), and vehicle-to-pedestrian (V2P) communication between a vehicle and pedestrians.

[0028] Although many embodiments of the present disclosure are described in the context of V2X communication networks based on long term evolution (LTE) and new radio (NR), it should be understood that these embodiments may also be implemented in other standard-compliant communication systems, such as communication systems that comply with the Institute of Electrical and Electronic Engineers (IEEE) 802.11 technical standards and / or other technical standards, as well as communication systems that do not comply with the standards. As used herein, the term "network" refers to any collection of two or more devices that communicate with each other directly or indirectly, including a network in which user-side devices communicate directly with network-side devices, a network in which user-side devices communicate indirectly with each other through network-side devices, and a network in which user-side devices communicate directly with each other without being relayed by intermediate network-side devices. Other examples may also exist, such as a machine-to-machine (M2M) network in which network-side devices communicate directly with each other.

[0029] V2X communication enables the exchange of information between vehicles, other vehicles, pedestrians, and infrastructure. In some embodiments, the information exchanged via V2X communication can supplement information generated by vehicle sensors (e.g., radar, cameras, ultrasonic sensors, etc.) to provide vehicle autonomy and traffic predictability. V2X communication can provide many benefits, including (but not limited to) improved safety (e.g., forward collision warning, road work notifications, situational awareness, intent communication, etc.), energy efficiency (e.g., enhanced route selection, reduced route travel time, etc.), and convenience (e.g., real-time route corrections, traffic signal priority, etc.). V2X communication can leverage various features of the device-to-device (D2D) communication protocol standardized in Releases 12 and 13 of the 3rd Generation Partnership Project (3GPP). For example, V2X communication can occur over the sidewalk interface between UEs without forwarding the V2X communication through an intermediate base station (e.g., an evolved node B (eNodeB or eNB)). Messages in D2D and V2V can be transmitted on the physical sidelink discovery channel (PSDCH), PSSCH, PSCCH, physical sidelink broadcast channel (PSBC), or other signaling (such as primary sidelink synchronization signal (PSSS) or secondary sidelink synchronization signal (SSSS)).

[0030] It should also be noted that the European Commission (EC) and the Federal Communications Commission (FCC) have allocated 75 MHz of bandwidth in the 5.9 GHz region for ITS applications. This allocated spectrum can be shared between different technologies (e.g., NR, LTE, etc.). Although the embodiments are primarily described from the perspective of Mode 3 LTE V2X UE (sharing the frequency band with Mode 4 LTE-V2X UE), it should be understood that the described embodiments may also cover other scenarios, such as "Mode 3" NR V2X UE sharing the frequency band with Mode 4 LTE V2X UE and / or "Mode 4" NR V2X UE sharing the frequency band with Mode 4 LTE V2X UE.

[0031] Generally, V2X messages can be broadcast by UEs on the ITS band without network participation (referred to as Mode 4), or by UEs scheduled by a base station on the ITS band (referred to as Mode 3). In the case where Mode 3 UEs and Mode 4 UEs can select the same resources from the resource pool, problems may arise when autonomously scheduled UEs (i.e., Mode 4) and base station-scheduled UEs (i.e., Mode 3) select the same resources for V2X communication, which will result in signal interference and poor signal reliability. Other problems may arise when V2X communication is periodic and UEs coexist on the same carrier. The embodiments of the present disclosure provide an improved scheduling scheme for base station-scheduled UEs.

[0032] Figure 1 is a diagram of a network 100 for communicating data. The network 100 includes a base station 110 having a coverage area 101, multiple UEs 120, and a backhaul network 130. As shown, the base station 110 establishes an uplink (dashed line) connection and / or a downlink (dash-dot line) connection with the UE 120, which is used to carry data from the UE 120 to the base station 110, and vice versa. The data communicated via the uplink / downlink connection may include data communicated between the UEs 120 and data communicated to / from a remote end (not shown) via the backhaul network 130. As used herein, the term "base station" refers to any network-side device for providing wireless access to a network, such as an enhanced Node B (eNodeB or eNB), an agNB, a transmit / receive point (TRP), a macro cell, a femto cell, a Wi-Fi access point (AP), and other wireless devices. The base station can provide wireless access according to one or more wireless communication protocols (such as 5G new radio (NR), LTE, evolved LTE (LTE advanced, LTE-A), high speed message access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc.). As used herein, the term "UE" refers to any user-side device for accessing the network by establishing a wireless connection with a base station, such as a mobile device, a mobile station (STA), a vehicle, and other wireless devices. In some embodiments, the network 100 may include various other wireless devices, such as relays, low-power nodes, etc.

[0033] Figure 2A schematic diagram 140 of an embodiment of a Mode 3 deployment configuration in a V2X network is shown. In a Mode 3 V2X deployment configuration, a base station 110 schedules resources for V2X communication for one or more UEs 142, 144. V2X communication may be performed on a dedicated (i.e., designated) carrier for V2X communication (e.g., an ITS band). The base station 110 allocates resources for V2X communication to each UE 142 via a cellular link 150 between the base station 110 and the UE 142. V2X communication is performed on a V2X communication interface 148 from the UE 142 to the UE 144. Although in Figure 2 A single UE 142 and one to three UEs 144 are shown, but other numbers of UEs 142 and 144 are contemplated. In a typical Mode 3 embodiment, the UE will receive authorization and other control messages for V2C communications over link 148, and V2X data communications will occur over link 150.

[0034] It should be understood that in some embodiments, UEs 142, 144, 146 may be vehicles, and the communication interface may be a sidewalk communication interface from UE 142 to UE 144. It should also be understood that in some embodiments, UEs 144, 146 may also communicate directly with base station 110 via a cellular link. V2X communication may be unicast 152, broadcast 154, or multicast 156. In unicast 152, UE 142 communicates with a single UE 144; in broadcast 154, UE 142 communicates with all UE 144 devices; and in multicast 156, UE 142 communicates with one or more (but not necessarily all) UE 144 devices. As an example, UE 146 does not communicate with UE 142 in a multicast 156 transmission. Other solutions are also contemplated.

[0035] Figure 3 Figure 160 illustrates an embodiment communication sequence in which base station 110 schedules UE 142 for V2X communication on a dedicated carrier. Base station 110 may send a resource grant message on cellular band link 150, for example, using a PDCCH or a DCI message based on format 5A. In this configuration, different resources are allocated in the resource grant message from base station 110 to each UE 142a, 142b, 142c.

[0036] Typically, base station 110 operates in the cellular band spectrum and does not perform resource awareness measurements in the ITS band spectrum. In other words, base station 110 is generally unaware of the availability of resources on the dedicated carrier for V2X communications. However, in a Mode 3-only deployment configuration, since base station 110 schedules resource allocation, the likelihood of collisions or interference between different V2X communications is minimal.

[0037] Figure 4Schematic diagram 170 illustrates an embodiment of a Mode 4 deployment configuration in a V2X network. In a Mode 4 deployment configuration, scheduling and interference management for V2X communications are implemented autonomously (i.e., autonomously managed) between UEs 172. In this deployment, UEs 172 are not required to be located within the coverage area 101 of base station 110, resource selection can be autonomous, and resources can be selected from a resource pool without network assistance. In some embodiments, UEs 172, 174, and 176 can be vehicle UEs, and the communication interface can be a sidewalk communication interface from UE 172 to UE 174.

[0038] In this embodiment, V2V, V2I, or V2P does not rely on network assistance for scheduling, and V2X communication can be performed both within and outside the coverage area. Figure 3 , the V2X communication may be a direct communication link 178, such as a sideline interface from a Mode 4 UE 172 to a UE 174.

[0039] Figure 5 FIG190 is a diagram of an embodiment of a communication sequence for UE autonomous scheduling (i.e., Mode 4) for V2X communication. UE 172 senses congestion in a sliding sensing window 192 and optimizes resource scheduling in overlapping resources. Once the UE selects resources 193, 195, and / or 197, the UE will indicate them as "reserved for the future" ("X" in the figure). Other UEs that sense the medium decode the control channel sent by the UE and determine that the resource is reserved for future use. The sensing UE may then not select the resource. Figure 5 , a first resource 193 is identified by a square with a dash, a second resource 195 is identified by a square with a crossed dash, and a third resource 197 is identified by a square with a dot. Each resource 193, 195, and 197 can be selected by a UE and reserved for the UE, thereby preventing other UEs from using the same resource, at least in the vicinity.

[0040] Some advantages of Mode 4 deployment configuration are reduced cost (i.e., network investment), reduced complexity (i.e., coordination between UE and base station), and the ability to be deployed outside of network coverage. Similar to Mode 3 deployment, Mode 4 can have unicast 182, broadcast 184, multicast 186, or other types of solutions.

[0041] Figure 6 FIG200 is a diagram of an embodiment of a V2X communication network illustrating a combined deployment configuration of Mode 3 and Mode 4. The Mode 3 and Mode 4 configurations may be deployed on the same carrier and may coexist with each other.

[0042] In this configuration, the Mode 4 UE 172 may select resources from a resource pool shared with the Mode 3 UE 142. The Mode 4 UE 172 may select resources after sensing the medium, which includes the Mode 3 UE 142 and any other Mode 4 UEs 172. However, the base station 110 may allocate resources to the Mode 3 UE 142 without knowing resource selection and scheduling information related to the Mode 4 UE 172.

[0043] In some embodiments, a Mode 3 UE 142 or a Mode 4 UE 172 may travel from the coverage area 101 of the base station 110 to an area 102 outside the coverage of the base station 110. In the partial coverage area 104 of the base station 110, the UEs 144 and 174 may receive information from UEs both within and outside the coverage area. In the partial coverage area 104, the Mode 3 UE 142 (within coverage) and the Mode 4 UE 172 (within coverage or outside coverage) coexist and effectively share the same resource pool. It should be noted that in some embodiments, the Mode 3 UE 142 or the Mode 4 UE 172 may communicate with a UE 144 or a UE 174, respectively, that uses a different communication technology (e.g., NR).

[0044] Figure 7 A schematic diagram 210 illustrates an embodiment of a method for reselecting resources in response to resource interference between adjacent UEs. As shown, in V2X communications, multiple transmissions of a failure packet 232 may occur when two adjacent UEs select the same or overlapping resources at approximately the same time. To transmit a success packet 234, one of the two UEs may select a different resource, or the two UEs may need to be separated by a sufficient distance. However, both options may take several seconds. In embodiments without broadcast feedback, the transmitting UE may be unaware of the occurrence of a collision. Similarly, because resource reselection is relatively rare, multiple UEs may be unable to receive packets for a significant period of time.

[0045] Figure 8 2 is a diagram 220 illustrating an embodiment of continuous packet loss experienced by a Mode 3 UE 142 in V2X communications, as originally described in 3GPP document R1-1611130 on Mode 4 to Mode 4 Interference. As shown, a significant portion of UEs experience continuous packet loss in Mode 3 V2X communications. The diagram illustrates that approximately 2.5% of vehicles experience at least ten (10) consecutive packet losses. It should also be noted that in some cases, the percentage of UEs experiencing continuous packet loss can be higher (e.g., for shorter packet periods).

[0046] Figure 9A flowchart 240 illustrates an embodiment of a method performed by base station 110 for scheduling and receiving feedback reports for V2X communications. Base station 110 schedules transmissions for UE 142 over cellular link 150. Base station 110 also instructs one or more neighboring UEs (e.g., UE 144) to serve as probing UEs. The one or more probing UEs monitor the quality (e.g., success, interference, collisions, etc.) of transmissions performed by UE 142 over the ITS band and send feedback reports to base station 110.

[0047] In step 242, the base station 110 determines that a UE 142 within the coverage area of ​​the base station 110 needs to transmit data by, for example, receiving a scheduling request on the cellular link 150. The data transmission performed by the UE 142 can be a single packet transmission (i.e., a dedicated packet transmission) or a periodic or semi-persistent message. Embodiments of the present disclosure can be applied to aperiodic single packet transmissions and periodic or semi-persistent transmissions to be performed by the UE 142 on the ITS band. For example, the base station 110 can assign one or more semi-persistent scheduling (SPS) processes to the UE 142 to address requests for semi-persistent transmissions.

[0048] In step 244, base station 110 receives information about available and idle resources within the ITS frequency band for V2X communication in order to schedule resources for UE 142. Base station 110 may receive resource allocation information from UE 142 in response to a request from the base station, independently initiated by UE 142, or initiated by a neighboring UE. In embodiments where UE 142 independently sends available resources in the ITS frequency band to base station 110 (i.e., without receiving a request from base station 110), steps 242 and 244 may be combined.

[0049] In some embodiments, before receiving the resource allocation information, base station 110 may send a resource allocation information request message to UE 142. The resource allocation information request message may include sensing window information or measurement thresholds. In response to the resource allocation information request message, the base station may receive a corresponding response message from UE 142 via a communication link (e.g., cellular link 150, relay link, sidelink, etc.), indicating available resources in the ITS frequency band for V2X communication. The response message may be received over cellular link 150 using, for example, the RRC protocol, PUCCH, or RACH.

[0050] In some embodiments, base station 110 may receive sensing information from UE 142 indicating available resources within a time-limited sensing window and / or a set of potential candidate resources identified by UE 142. The sensing information may include a signal quality parameter from UE 142, which may be a measurement of at least one of: RSRP, RSRQ, RSSI, SIR, SINR, or FER.

[0051] Measurements on reference signals can be performed on various reference signals, including but not limited to: channel state information reference signal (CSI-RS), beamforming reference signal, synchronization signal (SS), or SS / physical broadcast channel (PBCH) block. An index or indicator associated with a specific reference signal (such as a CSI-RS resource indicator (CRI) or an SS / PBCH block resource indicator (SSBRI)) can be included in the message carrying the perception information. In the case where multiple precoded reference signals use multiple resources or multiple resource sets, and the precoding of the reference signals transmitted on different resources or different resource sets is different, the index or indicator can be used to distinguish specific reference signal resources. In this case, indicating a resource can implicitly indicate a specific precoding. The aforementioned precoding may include, for example, digital precoding and / or analog radio frequency (RF) beamforming at the baseband. Digital precoding and / or analog RF beamforming are particularly necessary or useful for millimeter-wave (mmWave) systems operating at, for example, high-frequency (HF) or frequency range 2 (FR2).

[0052] In some embodiments, the sensing information may include a reference signal resource indicator or a set of reference signal resource indicators, but not an associated signal quality value. The base station may then infer, based on, for example, a predetermined protocol, whether the indicated reference signal resource is suitable for new scheduling.

[0053] In step 246, base station 110 may perform scheduling for UE 142. Based on the response message received from UE 142 in step 244 (i.e., sensing information, signal quality parameter set, potential candidate resource set, etc.), base station 110 selects resources on the ITS frequency band for V2X communication by UE 142. In step 248, base station 110 sends a resource grant message to UE 142 via cellular link 150, identifying the resources on the ITS frequency band for V2X communication by UE 142. Base station 110 may send the resource grant message in a PDCCH or using a DCI format 5A message type. In embodiments where base station 110 configures UE 142 using SPS, base station 110 may send the resource grant message to UE 142 using, for example, the RRC protocol or a MAC address.

[0054] In step 250, upon determining that UE 142 needs to transmit data in V2X communication, base station 110 may identify one or more nearby UEs to serve as probing UEs. In embodiments where UE 142 broadcasts a transmission (e.g., a Rel-14 safety service) to all UEs, base station 110 may select one or more probing UEs from the group of UEs receiving the broadcast based on one or more defined criteria. For example, based on known location information of Mode 3-configurable UEs in the vicinity of UE 142, base station 110 may select a subset of receiving UEs as probing UEs. As another example, base station 110 may randomly select a subset of Mode 3 UEs within a specified distance or geographic range of UE 142. In some embodiments, the probing UEs may be a subset of UEs receiving V2X communication located on a highway, but a subset of UEs receiving V2X communication traveling on nearby roads may be excluded from the UE probing selection. Probing UEs may be identified based on the signal strength of V2X communication on the ITS band, which was received from UE 142 during the probing phase or a previous broadcast. In one embodiment, a probing mechanism for unused resources can be used when only a small number of devices are allowed to broadcast for the purpose of measuring the signal strength at the receiving device. Probing can be performed using, for example, a spreading code, where the probing signal can be sent less frequently and for a shorter length than a normal broadcast. In another example, the initial broadcast by UE 142 can be a probing transmission, where the receiving UE can be used to report the signal strength of the probing transmission to base station 110 via cellular link 150. In one embodiment, the transmission quality of UE 142 can be checked to assess whether the packet reception ratio (PRR) at the receiving UE meets a threshold at a specific distance, such as 90% at a distance of 300 meters. One or more UEs that meet the specified threshold can then be selected as probing UEs.

[0055] In embodiments where the transmission from UE 142 is a unicast transmission (e.g., a shared sensor application), the base station may designate Mode 3 configurable intended targets for data transmission as probing UEs. In some embodiments, the base station may designate Mode 3 configurable UEs that are near unicast receiving UEs as probing UEs. In one embodiment, base station 110 may designate a group of one or more UEs in the vicinity of the intended unicast transmission as probing UEs.

[0056] In embodiments where the transmission from UE 142 is a multicast transmission (e.g., a queue), base station 110 may identify one or more probing UEs from the entire set of UEs designated as intended recipients of the multicast transmission, or a subset thereof. As an example, for UEs where each UE is a vehicle in a vehicle queue, when sending a message to these UEs, the probing UEs may be all UEs in the queue, the UE at the head of the queue, and / or the UE at the tail of the queue. If some of the intended recipients in the multicast transmission are not Mode 3 UEs, one or more neighboring Mode 3 UEs may be selected instead.

[0057] In step 252, base station 110 instructs the one or more probing UEs selected in step 250 to monitor the V2X communication quality of UE 142 on the ITS frequency band. In some embodiments, base station 110 may indicate the status of the probing UEs via a configuration request message over cellular link 150. The configuration request message may include at least one of a DCI message, an SCI message, a MAC control element message, or an RRC message. The configuration request message may include information for configuring each of the one or more probing UEs to send a feedback report indicating the V2X communication quality of UE 142 to base station 110.

[0058] In some embodiments, the configuration request message may be explicit. The base station 110 may send a message to each probing UE to indicate the resources to be probed, and / or identify the V2X transmitting UE (i.e., UE 142) to be probed. The configuration request message may vary depending on the selection method used by the base station 110 in step 250. As an example, the configuration request message may be sent to a group of UEs within a given geographic area. For example, the configuration request message may include a set of coordinates for identifying the geographic area and a radius around the coordinates. Optionally, the approximate geographic area may be identified by a path loss measurement, which, for example, only considers UEs with an average signal quality above a threshold. One or more Mode 3 configurable UEs within the geographic area may then be indicated as probing UEs.

[0059] In some embodiments, the configuration request message may be implicit. The probing UE may be configured to monitor control messages, such as DCI messages, to identify the resource grant message sent from the base station 110 to the UE 142 (i.e., step 248). The monitoring UE may then serve as a probing UE for V2X communications. The UE 142 and the probing UE may share a physical downlink control channel search space and a radio network temporary identifier (RNTI) to successfully decode the resource grant message.

[0060] The configuration request message may include a configuration indication indicating resources to be monitored in V2X communication and / or an identification parameter of UE 142. The configuration request message or probe request from base station 110 may be at least one of the following: a DCI message, a MAC control element message, or an RRC message. Base station 110 may also send a second resource grant message to one or more probing UEs, where the second resource grant message identifies available resources for transmitting feedback reports from the one or more probing UEs to base station 110 via cellular link 150.

[0061] In step 254, the base station 110 receives feedback reports from the one or more probing UEs using the resources identified in step 252. The feedback reports may include signal quality parameters with measurements of at least one of the following corresponding to V2X communication quality: RSRP, RSRQ, RSSI, SIR, SINR, or FER. The feedback reports may be communicated to the base station 110 using, for example, the PUCCH, the physical uplink shared channel (PUSCH), or the RACH.

[0062] In the ITS band, V2X communications may be sidelink transmissions. The quality of the sidelink transmissions may be assessed using the RS on the PSSCH of the sidelink connection. The feedback report may also include CSI. In some embodiments, to reduce overhead, base station 110 may receive feedback only in response to one or more probing UEs not receiving a message on the sidelink connection.

[0063] The feedback report may include an indicator indicating whether the probing UE received a message in V2X communication over the ITS band, or whether the message received by the probing UE in V2X communication was sent from a UE scheduled by the base station (Mode 3) or from an autonomously scheduled UE (Mode 4). In some embodiments, the feedback report may include quality indicators of more than one transmitting UE in a separate V2X communication over the ITS band.

[0064] In step 256, upon receiving feedback reports from one or more probing UEs, the base station can evaluate the transmission quality of UE 142 and take appropriate action. The base station can send an updated resource grant message to UE 142 based on the feedback reports, which identifies available resources for retransmission over the V2X communication interface. The retransmission can include a subset of the data sent by UE 142 in the initial V2X communication.

[0065] Figure 10 A flowchart 270 illustrates an embodiment of a method for receiving scheduling and conducting V2X communications performed by UE 142. UE 142 may send a request message to base station 110 via cellular link 150 to request scheduling of V2X communications in the ITS frequency band. UE 142 may then send resource allocation information to base station 110 via cellular link 150, identifying available resources for V2X communications. UE 142 then receives a resource grant message from base station 110 via cellular link 150, identifying resources in the ITS frequency band for V2X communications. UE 142 communicates with surrounding UEs in the ITS frequency band using the resources identified by the resource grant message.

[0066] In step 272, UE 142 may send a scheduling request to base station 110 via cellular link 150 to request the base station to schedule V2X communication in the ITS band. When the data transmission of UE 142 is a periodic message, UE 142 may request resources for periodic V2X communication.

[0067] In step 274, UE 142 transmits resource allocation information to base station 110 via cellular link 150. The resource allocation information identifies available and idle resources in the ITS frequency band for V2X communication. In some embodiments, step 274 may be initiated in response to a request for resource allocation information from base station 110. UE 142 may receive a resource allocation information request message from base station 110 and use the measurement threshold information in the request message to determine the availability of resources for V2X communication. In some other embodiments, step 274 may be initiated by a neighboring UE of UE 142. In one embodiment, UE 142 may initiate step 274 without any external request message, and steps 272 and 274 may be combined. In some embodiments, to limit communication overhead, UE 142 may transmit a subset of potential candidate resources to base station 110.

[0068] In step 276, UE 142 may receive a resource grant message from base station 110 in response to the resource allocation message sent in step 274. The resource grant message is used to identify resources in the ITS frequency band for V2X communication by UE 142. In step 278, UE 142 communicates on the ITS frequency band using the resources identified in the resource grant message.

[0069] In some embodiments, the UE's transmission may be a sidelink data transmission. UE 142 may send an SCI message on the PSCCH to surrounding UEs. UE 142 may then communicate with surrounding UEs on the PSSCH. The SCI message may include UE scheduling information bits that identify the scheduling type of UE 142, which may be a base station-scheduled UE (Mode 3) or an autonomously scheduled UE (Mode 4). Thus, one or more probing UEs may decode each received communication and determine, based on the UE scheduling information bits, whether a scheduled transmission from a Mode 3 UE is subject to interference from a Mode 4 UE.

[0070] Figure 11 A flowchart 280 illustrates an embodiment of a method performed by one or more probing UEs for receiving probing instructions and sending feedback reports in V2X communication. The one or more probing UEs receive instructions from the base station 110 to act as probing UEs. The one or more probing UEs determine the quality of the V2X communication and send corresponding feedback reports to the base station 110.

[0071] In step 282, the probing UE is notified by base station 110 to monitor the quality of V2X communications conducted by UE 142, for example, by receiving a configuration request message. The configuration request message may include a configuration indication, which includes a probe request from base station 110. The probe request indicates to one or more probing UEs the resources to be monitored and / or the identity of UE 142. In some embodiments, the probe request may include at least one of a DCI message, a MAC control element message, or an RRC message. In some embodiments, the probe request may include a resource grant message, which identifies available resources for transmitting feedback reports from the probing UE to base station 110. In another embodiment, the configuration indication may include a resource grant message sent to UE 142, which identifies available resources. UE 142 and the probing UE may share a physical downlink control channel search space and RNTI to successfully decode the resource grant message. In some embodiments, the probe request may include a request for a reference signal resource indicator, which, as previously described, is associated with signal quality in the feedback report.

[0072] In step 284, the probing UE measures the quality of the V2X communication channel of UE 142. For each probing UE or a group of probing UEs, the RS used for channel measurement can be configured on the cellular link 150 (e.g., 2 GHz) in a periodic, semi-static, or aperiodic manner. The probing UEs can be randomly grouped according to their geographic location, RNTI, or other criteria.

[0073] RSs used for channel measurement may include CSI-RS, beamforming reference signals, SS, and / or SS / PBCH blocks. Reference signals can be configured for the entire ITS band or for partial segments. Partial-band RS configuration allows for more accurate channel measurement in a specified partial segment. Wideband reference signal configuration (e.g., full ITS band RS configuration) allows for large-scale characterization of the measurement channel and is particularly important for semi-persistent scheduling when the channel fading across the entire band is flat or semi-flat.

[0074] In an embodiment where the interface for V2X communication in a wireless network is a sidelink connection, the probing UE may perform measurements on the PSSCH and PSCCH of the sidelink connection. As an example, the probing UE may decode the PSCCH (e.g., to obtain a bit indicating whether the transmitting UE is using mode 3 or mode 4) and / or may measure the link quality of the PSSCH. The demodulated RS in the packet may be used to evaluate the link quality to, for example, determine RSRP, RSRQ, or RSSI. In some embodiments, the probing UE may attempt to decode the PSCCH and, based on the decoding attempt, determine a quality metric and determine whether the probing UE was able to decode the packet. In some embodiments, a mode 3 UE and a mode 4 UE may be distinguished based on certain characteristics of the reference signal sent by the UE (e.g., a pseudo-random seed of the reference signal).

[0075] In some embodiments, the set of resource elements (REs) allocated to RS transmissions can be unique for each probing UE. This allows channel and interference measurements to be used as separate measurements. In some embodiments, the same REs can be allocated to multiple probing UEs that are geographically close to each other. This can reduce RS overhead while still maintaining the ability to determine the level of interference and the ability to use the measurement results in virtual sensing.

[0076] In step 286, the probing UE sends a corresponding feedback report to the base station 110 to indicate the quality of the V2X communication performed by the UE 142. In some embodiments, the feedback report is sent via a UL control channel, PUCCH, PUSCH, or RACH. The feedback report may include an identifier of the UE 142 and / or an indicator indicating whether the message received by the probing UE corresponds to a message sent from a base station-scheduled UE (i.e., Mode 3) or a message sent from an autonomously scheduled UE (i.e., Mode 4).

[0077] In some embodiments, the feedback report may include a signal quality parameter that is a measurement of at least one of the following: RSRP, RSRQ, RSSI, SIR, SINR, or FER. An index or indicator associated with a particular reference signal (e.g., CRI or SSBRI) may be included in the message carrying the perception information. In the case where multiple precoded reference signals use multiple resources or multiple resource sets, and the precoding of the reference signals transmitted on different resources or different resource sets is different, the index or indicator may be used to distinguish a specific reference signal resource. In this case, indicating a resource may implicitly indicate a specific precoding. The aforementioned precoding may include, for example, digital precoding and / or analog RF beamforming on the baseband, which may be particularly necessary or useful for millimeter wave systems operating in, for example, HF or FR2.

[0078] In some embodiments, the sensing information may include a reference signal resource indicator or a set of reference signal resource indicators, but not an associated signal quality value. The base station may then infer, based on, for example, a predetermined protocol, whether the indicated reference signal resource is applicable to the new scheduling. In some embodiments, the feedback report may include a CSI report and / or a beam report. The CSI / beam report may be sent on a scheduling channel such as PUCCH and / or PUSCH for periodic reporting. In response to significant changes in large-scale channel characteristics, a CSI / beam report may be sent on a random access channel. The probing UE may report CSI and / or beam quality to the base station via the cellular link 150 (i.e., a 2 GHz link) to assist in scheduling in the ITS band. The CSI / beam report may include channel measurements and / or interference measurements. The base station may request all or part of the probing UEs to provide CSI / beam reports based on the geographic location of the probing UE. The CSI / beam report may be unprocessed, reused, or further processed / refined and used for scheduling of neighboring UEs.

[0079] In an embodiment where UE 142 is configured with SPS, the probing UE may send a feedback report each time a single message is received from UE 142, or may send a feedback report only in response to the first receipt of a message from UE 142. In some embodiments, the feedback report is sent in response to the probing UE not receiving a message on the sidelink connection. In response to not receiving a message, the probing UE may subsequently send a feedback report with an indicator indicating that the message was not received.

[0080] Figure 12 Flowchart 300 is a flow chart illustrating an embodiment of a method performed by base station 110 for scheduling UEs 142 for V2X communication using pseudo-random allocation. In step 302, base station 110 instructs one or more Mode 3 UEs 142 to sense a V2X communication channel for transmissions from Mode 4 UEs 172. The instructions from base station 110 are transmitted via cellular link 150. In response to the instructions from base station 110, Mode 3 UEs 142 may report available resources and indicate the duration of the resource availability during the sensing period. In some embodiments, the report from Mode 3 UE 142 may also include RSSI information for occupied resources. In some embodiments, an RSSI threshold may trigger the reporting of information regarding occupied (i.e., busy) resources. Mode 3 UEs 142 may use the RSSI threshold to determine load conditions (idle or busy).

[0081] In some embodiments, the scheduling message may include, or be associated with, a beam indication for the scheduled communication. The beam indication may be implemented, for example, by indicating a quasi-collocation (QCL) spatial location, including but not limited to QCL type D defined in the new radio (NR) specification. The beam indication or QCL indication may be based on a reference signal quality and / or reference signal resource indicator included in a feedback report from one or more probing UEs, geographic location information and / or proximity information from the UE, and / or other information that may include spatial information.

[0082] In some embodiments, base station 110 may further instruct one or more Mode 3 UEs 142 to probe a resource channel (i.e., transmit a short duration reference signal containing a transmitter identifier) ​​and instruct the one or more Mode 3 UEs 142 to report received probe levels to base station 110. The report may also include the identifier of the transmitter in the channel. Channel probing may be performed on an idle channel, which may be determined based on previous reports from Mode 3 UEs 142. In some embodiments, the identity of the probing UE may be inferred from characteristics of a reference signal from the UE (e.g., a pseudorandom seed).

[0083] In step 304, the base station 110 sends a multicast transmission with available resources to one or more UEs 142, where the available resources indicate a pattern of transmission on the available resources determined according to step 302. In some embodiments, the pattern of transmission can be deterministic. As an example, the pattern can indicate a sequence of resources to be used for repeated broadcasts or pseudo-randomly for each Mode 3 UE 142, where the Mode 3 UE 142 can randomly select resources from the available resource pool for transmission. The transmission pattern can be selected to minimize interference between the Mode 3 UE 142 and other Mode 3 UEs 142 and / or Mode 4 UEs 172 while maximizing resource utilization (i.e., spatial reuse). It should be noted that in the pseudo-random distribution, possible interference from the Mode 3 UE 142 is generally averaged at the potential receiving UE 144. This advantageously improves the fairness of resource allocation.

[0084] In one embodiment, the hopping between resources may not be pseudo-random. As an example, in round robin hopping, each of N UEs is scheduled to transmit on N different resources. In a first round of transmissions, the first UE may transmit on the first resource, the second UE may transmit on the second resource, and so on. In a second round of transmissions, the first UE may transmit on the second resource, the second UE may transmit on the third resource, and the Nth UE may transmit on the first resource. Thus, in the i-th round of transmissions, the i-th UE transmits on the k-th resource, where k is equal to the sum of i and j minus 1 mod N, (i.e., k = (i+j–1) mod N). The resource allocation may remain valid for all or some of the UEs for a limited period of time or until the base station 110 instructs the UEs to terminate the resource allocation.

[0085] Figure 13 FIG3 is a flow chart 320 of an embodiment of a method performed by a UE 142 to schedule V2X communications using pseudo-random allocation. In step 322, the Mode 3 UE 142 receives an instruction to sense a V2X communication channel for transmissions by a Mode 4 UE 172. In step 324, the Mode 3 UE 142 senses the V2X communications according to the instruction from the base station 110 and sends a corresponding report back to the base station 110.

[0086] In step 326, the Mode 3 UE 142 receives a message from the base station 110 indicating the mode of V2X transmission on the available resources identified by the base station 110. In step 328, the Mode 3 UE 142 sends a communication to the UE 144 according to the scheduled resources and hopping information of step 326.

[0087] Figure 14A block diagram of an embodiment of a processing system 360 for executing the methods described herein is shown, which may be installed in a host device. As shown, the processing system 360 includes a processor 362, a memory 364, and interfaces 366-368, which may (or may not) be configured as Figure 14 Arrangement shown. The processor 362 can be any component or collection of components suitable for performing computing and / or other related processing tasks, and the memory 364 can be any component or collection of components suitable for storing programs and / or instructions for execution by the processor 362. In an embodiment, the memory 364 includes a non-transitory computer-readable medium. The interfaces 366, 368, 370 can be any component or collection of components that allow the processing system 360 to communicate with other devices / components and / or users. For example, one or more of the interfaces 366, 368, 370 can be suitable for conveying data messages, control messages, or management messages from the processor 362 to applications installed in the host device and / or remote device. As another example, one or more of the interfaces 366, 368, 370 can be suitable for allowing a user or user device (e.g., a personal computer (PC), etc.) to interact / communicate with the processing system 360. The processing system 360 may include Figure 13 Other components not shown in the figure, such as long-term storage (e.g., non-volatile memory, etc.).

[0088] In some embodiments, the processing system 360 is included in a network device that accesses a telecommunications network or is part of a telecommunications network. In one example, the processing system 360 is located in a network-side device in a wireless or wired telecommunications network, such as a base station, a relay station, a scheduler, a controller, a gateway, a router, an application server, or any other device in the telecommunications network. In other embodiments, the processing system 360 is located in a user-side device that accesses a wireless or wired telecommunications network, such as a mobile station, user equipment (UE), a personal computer (PC), a tablet computer, a wearable communication device (e.g., a smart watch, etc.), a vehicle capable of wireless communication, a pedestrian capable of wireless communication, an infrastructure unit capable of wireless communication, or any other device suitable for accessing a telecommunications network.

[0089] In some embodiments, one or more of interfaces 366, 368, 370 connects processing system 360 to a transceiver suitable for sending and receiving signaling in a telecommunications network. Figure 15A block diagram of a transceiver 380 suitable for sending and receiving signaling in a telecommunications network is shown. The transceiver 380 can be installed in a host device. As shown, the transceiver 380 includes a network side interface 382, ​​a coupler 384, a transmitter 386, a receiver 388, a signal processor 390, and a device side interface 392. The network side interface 382 may include any component or component set suitable for sending or receiving signaling in a wireless or wired telecommunications network. The coupler 384 may include any component or component set suitable for facilitating bidirectional communication on the network side interface 382. The transmitter 386 may include any component or component set (e.g., up-converter, power amplifier, etc.) suitable for converting a baseband signal into a modulated carrier signal suitable for transmission through the network side interface 382. The receiver 388 may include any component or component set (e.g., down-converter, low noise amplifier, etc.) suitable for converting a carrier signal received through the network side interface 382 into a baseband signal. The signal processor 390 may include any component or collection of components suitable for converting baseband signals into data signals suitable for communication via the device-side interface 392, and vice versa. The device-side interface 392 may include any component or collection of components suitable for communicating data signals between the signal processor 390 and components within the host device (e.g., the processing system 360, a local area network (LAN) port, etc.).

[0090] The transceiver 380 can send and receive signaling in any type of communication medium. In some embodiments, the transceiver 380 sends and receives signaling via a wireless medium. For example, the transceiver 380 can be a wireless transceiver suitable for communicating according to a wireless telecommunications protocol, such as a cellular protocol (e.g., long-term evolution (LTE), etc.), a wireless local area network (WLAN) protocol (e.g., Wi-Fi, etc.), or any other type of wireless protocol (e.g., Bluetooth, near field communication (NFC), etc.). In such an embodiment, the network side interface 382 includes one or more antennas / radiating elements. For example, the network side interface 382 may include a single antenna, multiple independent antennas, or a multi-antenna array for multi-layer communication, such as single input multiple output (SIMO), multiple input single output (MISO), multiple input multiple output (MIMO), etc. In other embodiments, transceiver 380 sends and receives signaling via a wired medium such as twisted pair cable, coaxial cable, fiber optics, etc. A particular processing system and / or transceiver may utilize all or a portion of the components shown, and the degree of integration may vary from device to device.

[0091] Although described in detail in the specification, it should be understood that various changes, substitutions, and modifications may be made without departing from the spirit and scope of the present disclosure as defined by the appended claims. In different figures, the same reference numerals are used to represent the same elements. In addition, because it will be easy for a person of ordinary skill in the art to understand from the present disclosure that currently existing or later machines, manufactures, material compositions, devices, methods, or steps to be developed can perform substantially the same functions or achieve substantially the same results as the corresponding embodiments described herein, the scope of the present disclosure is not limited to the specific embodiments described herein. Therefore, the appended claims include such processes, machines, manufactures, material compositions, devices, methods, or steps within their scope. Therefore, the specification and drawings should be regarded only as an explanation of the present disclosure as defined by the appended claims, and are intended to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the present disclosure.

Claims

1. A method for sidelink transmission in a wireless network where user equipment scheduled by a network device and autonomously scheduled user equipment coexist, the method being applied to a network device, characterized in that: The method comprises: Sending a resource grant message to a first user equipment (UE), where the resource grant message identifies available resources for the first UE to perform a first sidelink transmission; Sending a configuration request message to a second UE, wherein the configuration request message configures the second UE to monitor a signal quality of the first UE performing the first sidelink transmission on the available resources; and A feedback report is received from the second UE, where the feedback report indicates the quality of the first sidelink transmission by the first UE.

2. The method according to claim 1, characterized in that Also includes: A second resource authorization message is sent to the first UE according to the feedback report, where the second resource authorization message identifies available resources for the first UE to perform a second sidelink transmission.

3. The method according to claim 1 or 2, characterized in that Also includes: Awareness information is received from the first UE, where the awareness information indicates available resources within a time-limited awareness window.

4. The method according to claim 3, characterized in that The perception information includes a signal quality parameter from the first UE, where the signal quality parameter includes a measurement of at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), received signal strength indication (RSSI), signal-to-interference ratio (SIR), signal-to-interference plus noise ratio (SINR), or frame error rate (FER).

5. The method according to claim 3, characterized in that The perception information includes a set of potential candidate resources identified by the first UE.

6. The method according to any one of claims 1, 2, 4 and 5, characterized in that: The resource grant message is sent to the first UE in a physical downlink control channel (PDCCH).

7. The method according to claim 6, characterized in that The resource grant message is sent using a downlink control information (DCI) format 5A message type.

8. The method according to claim 1, characterized in that Also includes: A configuration request message is sent to one or more UEs, where the configuration request message configures each of the one or more UEs to monitor the quality of the first sidelink transmission performed by the first UE.

9. The method according to claim 8, characterized in that The configuration request message further includes: configuring each of the one or more UEs to send a corresponding feedback report to the network device, where the corresponding feedback report indicates the quality of the sidelink transmission performed by the first UE.

10. The method according to claim 9, characterized in that The configuration request message includes at least one of the following: a downlink control information (DCI) message, a medium access control (MAC) control element message, or a radio resource control (RRC) message.

11. The method according to claim 8, characterized in that The configuration request message includes a set of coordinates and a radius for identifying a geographical area.

12. The method according to claim 1, characterized in that The available resources for the sidestream transmission include available resources in an Intelligent Transportation System (ITS) frequency band.

13. The method according to claim 1, wherein The resource grant message is sent to the first UE over a cellular frequency band.

14. The method according to any one of claims 1, 2, 4, 5, 7 to 13, characterized in that The feedback report includes an identifier of the first UE.

15. The method according to claim 1, wherein The side transmission includes: The first UE sends a control channel to surrounding UEs using a sidelink control information SCI message on a physical sidelink control channel (PSCCH); and The first UE sends a data message to surrounding UEs on a physical sidelink shared channel (PSSCH).

16. The method according to claim 15, characterized in that The SCI message includes a UE scheduling information bit, where the UE scheduling information bit identifies a scheduling type of the first UE, where the scheduling type is network device scheduling of the UE or autonomous scheduling of the UE.

17. A method for sidelink transmission in a wireless network where user equipment scheduled by a network device and autonomously scheduled user equipment coexist, the method being applied to user equipment (UE), characterized in that: The method comprises: receiving a configuration request message from a network device, wherein the configuration request message configures the UE to monitor a signal quality of a sidelink transmission performed by a second UE on available resources allocated by the network device; and A feedback report is sent to the network device, where the feedback report indicates a signal quality of the sidelink transmission of the second UE in the wireless network.

18. The method according to claim 17, characterized in that The interface for sidelink transmission in the wireless network is a sidelink connection, and wherein the quality of the sidelink connection is evaluated using a reference signal (RS) on a physical sidelink shared channel (PSSCH) of the sidelink connection.

19. The method according to claim 17 or 18, characterized in that The resources used for sidetrack transmission include resources in an Intelligent Transportation System (ITS) frequency band, and wherein the feedback report includes channel state information (CSI).

20. The method according to claim 17 or 18, characterized in that Also includes: The feedback report is sent to the network device using a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a random access channel (RACH).

21. The method according to claim 17 or 18, characterized in that The feedback report includes a signal quality parameter, wherein the signal quality parameter includes a measurement of at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), received signal strength indication (RSSI), signal-to-interference ratio (SIR), signal-to-interference and noise ratio (SINR), or frame error rate (FER).

22. The method according to claim 17 or 18, characterized in that The configuration request message indicates the resources to be monitored or the second UE to be monitored in the sidelink transmission.

23. The method according to claim 17 or 18, characterized in that The configuration request message includes at least one of the following: a downlink control information (DCI) message, a medium access control (MAC) control element message, or a radio resource control (RRC) message.

24. The method according to claim 17 or 18, characterized in that Also includes: A resource authorization message is received from the network device, the resource authorization message identifying available resources for sending the feedback report.

25. The method according to claim 17 or 18, characterized in that The feedback report includes the identifier of the second UE for the sideline communication.

26. The method according to claim 17 or 18, characterized in that The feedback report is sent in response to the UE not receiving a message on the UE's sidelink connection for sidelink transmission.

27. The method according to claim 17 or 18, characterized in that The feedback report includes an indicator for indicating whether a message is received in the sideline transmission.

28. The method according to claim 17 or 18, characterized in that The feedback report includes an indicator, where the indicator is used to indicate whether the message received by the UE in the sidelink transmission corresponds to a message sent by the UE scheduled by the network device or a message sent by the UE scheduled autonomously.

29. The method according to claim 17 or 18, characterized in that The second UE is configured using semi-persistent scheduling (SPS), wherein the network device schedules the second UE for the sideline communication, and wherein the UE sends the feedback report each time a single message is received from the second UE, or sends the feedback report only in response to the first receipt of a message from the second UE.

30. The method according to claim 17 or 18, characterized in that The receiving of the configuration request message from the network device further includes: each of the UEs sharing a physical downlink control channel search space and a radio network temporary identifier (RNTI).

31. A network device in a wireless network where user equipment scheduled by the network device and autonomously scheduled user equipment coexist, comprising: a non-transitory memory storage including instructions; as well as a processor in communication with the non-transitory memory storage, wherein the processor executes the instructions to: Sending a resource grant message to a first user equipment (UE), wherein the resource grant message identifies available resources for the first UE to perform a first sidelink transmission in the wireless network; Sending a configuration request message to a second UE, wherein the configuration request message configures the second UE to monitor a signal quality of the first UE performing the first sidelink transmission on the available resources; and A feedback report is received from a second UE, wherein the feedback report indicates a signal quality of the first sidelink transmission by the first UE in the wireless network.

32. The network device according to claim 31, wherein: Also includes: The network device sends a second resource authorization message to the first UE according to the feedback report, where the second resource authorization message identifies available resources for the first UE to perform second sideline communication.

33. The network device according to claim 31 or 32, characterized in that: Also includes: The network device receives awareness information from the first UE, where the awareness information indicates available resources within a time-limited awareness window.

34. The network device according to claim 33, wherein: The perception information includes a signal quality parameter from the first UE, where the signal quality parameter includes a measurement of at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), received signal strength indication (RSSI), signal-to-interference ratio (SIR), signal-to-interference plus noise ratio (SINR), or frame error rate (FER).

35. The network device according to claim 33, wherein: The perception information includes a set of potential candidate resources identified by the first UE.

36. A user device in a wireless network where user devices scheduled by a network device and user devices scheduled autonomously coexist, comprising a processor, a memory, and an interface, wherein the interface is used to communicate with other devices, the memory stores instructions, and the processor executes the instructions to implement the method described in any one of claims 17-30.

37. A system for sidelink transmission in a wireless network where user equipment scheduled by a network device and user equipment scheduled autonomously coexist, characterized in that: include: The network device according to any one of claims 31 to 35 and the user equipment according to claim 36.

38. A computer-readable medium, characterized in that The computer-readable medium comprises instructions, and when the instructions are run on a computer, the method according to any one of claims 1 to 30 is executed.

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