Communication procedures

Abstract

The invention relates to a method for communication between a first RSU and a second RSU via a radio link between the first and second RSU, comprising the following steps: transmitting a first radio signal by means of the first RSU to the second RSU, receiving at least one parameter of the radio link transmitted by means of the second RSU by means of the first RSU after the transmission of the first radio signal, determining at least one measure influencing the radio link based on the at least one received parameter by means of the first RSU, and implementing the determined at least one measure by means of the first RSU. The invention further relates to a device, a computer program, and a machine-readable storage medium.

Description

- 1 - 5 Description title Communication procedures 10 The invention relates to a method for communicating between a first RSU (Road-Side-Unit) and a second RSU. The invention further relates to a Device, a computer program and a machine-readable Storage medium. 15 State of the art The translation DE 60 036 530 T2 of the European patent specification EP 1 115 221 B1 discloses a communication system. 20 The publication DE 11 2012 005 853 T5 of the international application with Publication number WO 2013 / 118307 reveals a Driving assistance device. European patent EP 2 229 668 B1 discloses a transfer of 25 vehicle-relevant data points from a vehicle via mobile communication. Disclosure of the invention The object underlying the invention is to develop a concept 30 for efficient communication between a first RSU and a second to provide RSUs. This task is accomplished by means of the respective subject of the independent Claims resolved. Advantageous embodiments of the invention are the subject of 35 of each dependent subclaim. 2 / 24 - 2 - After an initial aspect, a procedure for communication between a first RSU and a second RSU via a radio link between provided by the first RSU and the second RSU, including the following Steps: 5. Sending a first radio signal from the first RSU to the second RSU, Receiving at least one parameter transmitted via the second RSU the radio link via the first RSU after the transmission of the first radio signal, Determine at least one measure affecting the radio connection 10 based on at least one parameter received using the first RSU, Implementing at least one of the identified measures using the first RSU. A second aspect is that a device, in particular an RSU, 15 provided, which is set up, all steps of the procedure after the first aspect to be executed. A third aspect involves providing a computer program which includes commands that are issued when the computer program is executed by a 20 computers, for example by means of the device according to the second aspect, cause them to carry out a procedure in accordance with the first aspect. A fourth aspect is a machine-readable storage medium. provided, on which the computer program runs according to the third aspect 25 is stored. The invention is based on and includes the understanding that the The above task can be solved by having a second RSU Parameters of the radio link between the second and first RSU 30 determined based on the first radio signal and these determined parameters sends to the first RSU. This, for example, provides the technical advantage This ensures that the first RSU efficiently gains knowledge of the determined parameter. can be obtained so that, based on the determined parameter, the first RSU can efficiently plan and implement measures or actions which 35. Influence radio connections. For example, the radio connection can be efficient. can be optimized. For example, an improved [something] can be efficiently achieved. 3 / 24 - 3 - Communication between the first and second RSUs is established. Thus For example, the radio connection can be efficiently adapted to the specific situation at hand. The situation will be adapted. 5 For example, the first RSU is located in a particularly critical transport infrastructure points, for example tunnel entrances, Construction sites, junctions, is arranged and information is sent to motor vehicles sends which are located in the vicinity or surrounding area of ​​the first RSU. Based on this information, motor vehicles can be monitored when passing through. 10 of the transport infrastructure office will be supported. This information can They are therefore used in particular to perform safety-critical functions, for example, at least partially automated driving functions of the motor vehicle to support or even make possible in the first place. Examples of such information include: critical events, for example, that a construction site is approaching 15 contains a list of road users, for example motor vehicles, Pedestrians, in a specific area or in the vicinity of the first RSU, Obstacles in an area or in the vicinity of the first RSU, open space and / or drivable area in an area or in the vicinity of the first RSU, a specific recommendations for action regarding railway planning or trajectory planning, 20 parameters for route planning or trajectory planning. The above information can be accessed via the first RSU at The use of (initial) radio signals to motor vehicles. For this purpose Using this information is advantageous if the vehicle is aware 25 of them, whether the current situation allows for the transfer of the required Information transmitted wirelessly, for example with a required quality, is permitted. Parameters of the radio connection can, for example, be passive and / or... For example, it can be actively determined by the motor vehicle itself. However, it must This must be located within radio range of the first RSU. 30 A second RSU is located in the vicinity of the first RSU. is ordered by the first RSU. For example, the second RSU a distance from the first RSU, arranged in the direction in which motor vehicles are located approach the first RSU. 35 4 / 24 - 4 - The first RSU is used, for example, to perform the aforementioned tasks. Information via radio connection, especially wireless Direct communication, to be distributed. This is especially with the aim that the The above information is used or will be used in motor vehicles. 5 can. The second RSU primarily assumes the role of a pseudo-motor vehicle, which, for example, can drive at least partially automatically, and receives This information (the first radio signal), for example, is also used for the 10 or the motor vehicles are intended and can, for example, be in accordance with a embodiment that specifies at least one parameter for motor vehicles under Use of second radio signals to relay. This allows in Advantageously, motor vehicles should be checked earlier, even before they are in Radio range of the first RSU, information about the radio link 15 and, if necessary, initiate appropriate measures. Such a One measure could be, for example, that at least a partially automated process Driving function in the motor vehicle is restricted or deactivated because the Radio link between the first RSU and the vehicle, if it exists within radio range of the first RSU, but the quality was insufficient. 20 such that the foregoing information is securely transmitted to the Motor vehicle data can be transmitted so that the motor vehicle can be based on This information also ensures that at least the partially automated driving function is safe. can execute. Thus, a safety net can be advantageously established for Motor vehicles can be efficiently increased. 25 Because the second RSU was intended for motor vehicles receives information, thus assuming the role of a pseudo-motor vehicle, The second RSU can advantageously improve the quality of the radio link. measure, especially measure continuously. 30 The result of this measurement, i.e., the at least one parameter determined, is sent to the first RSU via the second RSU to obtain this result to efficiently deploy the first RSU. based on the measurement result, one or more measures should be taken. 35. Determine and implement measures that affect the radio connection. 5 / 24 - 5 - In one embodiment of the method, it is provided that at least A parameter is selected from the following group of parameters: Transmission frequency, transmission power, signal strength, latency, number of bit errors, Number of packet losses, duration of a transmission process between the first 5 RSU and the second RSU, status of standardized congestion control Mechanisms, number of radio participants, channel access time, bandwidth, Security assessment of the second RSU, how secure the radio link is. This results, for example, in the technical advantage that particularly 10 suitable parameters have been selected. The security assessment includes, for example, a warning. The second RSU can determine the security assessment, for example, by they are inconsistencies in a package order and / or in one of the first The certificate recognizes 15 radio signals. It is noted that, in order to be standards-compliant, radio participants must adjust their transmission rate and transmission power to the utilization of the radio channel. – for example, transmitting more slowly when many radio users are present There are 20. The goal is to reduce the channel's capacity and prevent overload situations. to avoid (“congestion”). The choice of parameters (transmission rate, power, access latency, repetition rate, This process occurs independently for each participant. Therefore, it can happen that... 25 that a participant adjusts his transmission parameters to a supposed congestion adapts, but the other participant knows nothing about it and about others parameters. The status of congestion control refers to determining which 30 parameter sets (transmit power, transmit rate, etc.) are used. In one embodiment of the method, which for example includes the respective Characteristics of at least one of the above and / or below described The embodiments include the provision that a second RSU can be used to... 35 second radio signal to a device located in the vicinity of the second RSU 6 / 24 - 6 - motor vehicle is sent, with the second radio signal being the at least one The determined parameters are represented. This results, for example, in the technical advantage that the determined 5 parameters can be efficiently transmitted to the motor vehicle. Thus, in Advantageously, the motor vehicle should be checked based on the parameter whether certain measures are required with regard to at least semi-automated driving function. 10 In an embodiment of the method, which, for example, Characteristics of at least one of the above and / or below described The embodiments include the provision that a second RSU can be used to... second radio signal sent to a mobile communication station, i.e. a base station will be, whereby the second radio signal contains at least one determined parameter 15 represents. This results, for example, in the technical advantage that the The mobile communication station sends the determined parameter to a large number of radio subscribers. can transmit in the vicinity or surrounding area of ​​the mobile phone base station. As a rule 20. A mobile phone base station has a greater range than an RSU, so that The determined parameter can also be sent to motor vehicles, which are outside the radio range of the second RSU. The second radio signal is sent, for example, to both the mobile phone base station and 25 to a motor vehicle located in the vicinity of the second RSU sent. In one embodiment of the method, which for example includes the respective Characteristics of at least one of the above and / or below described The 30 embodiments include a provision that the determined at least one Parameters via a wired communication network using the The first RSU will be received. Because the determined parameter is transmitted via a wired connection 35 Communication network to which the first RSU is sent, in particular The technical advantage means that reasons which the radio connection 7 / 24 - 7 - negatively affecting the relationship between the first RSU and the second RSU, not also nor the transmission or transmission of the determined parameter from the The second RSU negatively affects the first RSU. 5 In particular, the determined parameter is exclusively via a Wired communication network received via the first RSU. The wired communication network includes, for example, a wired communication connection, for example a 10 Ethernet connections, between the second RSU and the first RSU. The determined parameters are transmitted, for example, via the wired connection. Communication link sent to the first RSU. Statements relating to a parameter and / or a The 15 measures taken apply analogously to several parameters and / or several measures and vice versa. In one embodiment of the method, which for example includes the respective Characteristics of at least one of the above and / or below described The 20 embodiments include a provision that at least one parameter using the first RSU, each with a respective predetermined The parameter threshold is compared, whereby at least one measure is taken. is determined depending on the comparison. 25 This results, for example, in the technical advantage that at least A measure can be determined efficiently. In one embodiment of the method, which for example includes the respective Characteristics of at least one of the above and / or below described The 30 embodiments include a provision that at least one parameter a signal strength which is measured by the first RSU with a Signal strength threshold as a respective predetermined parameter threshold a comparison is made, whereby at least one of the identified measures involves an increase. a transmission power is included if the comparison has shown that the 35 Signal strength less than or less than or equal to the signal strength threshold. 8 / 24 - 8 - This results, for example, in the technical advantage that the The communication link, i.e., the radio link, is efficiently stabilized. can be. 5 In an embodiment of the method, which, for example, Characteristics of at least one of the above and / or below described The embodiments include the provision that at least one parameter a latency period which is measured using the first RSU with a Latency threshold as a respective predetermined parameter threshold 10 is compared, whereby the identified measure is at least one Degradation or a change in transmission frequency and / or a Changing a transmission channel includes, if the comparison has shown, that the latency is greater than or equal to the latency threshold. 15 This results, for example, in the technical advantage that the The communication link, i.e., the radio link, is efficiently stabilized. can be. In one embodiment of the method, which for example includes the respective 20 characteristics of at least one of those described above and / or below The embodiments include the provision that at least one parameter a number of bit errors, which are detected using the first RSU with a Bit error count threshold as a respective predetermined value The parameter threshold is compared, whereby the determined value is at least one 25. A measure includes degradation if the comparison has shown that the Number of bit errors greater than or greater than the bit error count threshold is. This results, for example, in the technical advantage that the 30 communication links, i.e., the radio link, efficiently stabilized can be. In one embodiment of the method, which for example includes the respective Characteristics of at least one of the above and / or below described The 35 embodiments include a provision that at least one parameter a number of packet losses, which are covered by the first RSU with 9 / 24 - 9 - a packet loss count threshold as a respective predetermined value The parameter threshold is compared, whereby the determined value is at least one A measure includes degradation if the comparison has shown that the Number of packet losses greater than or equal to the The packet loss count threshold is 5. This results, for example, in the technical advantage that the The communication link, i.e., the radio link, is efficiently stabilized. can be. 10 In one embodiment of the method, which for example includes the respective Characteristics of at least one of the above and / or below described The embodiments include the provision that at least one parameter A security assessment of the second RSU includes how secure the 15 radio connection is, whereby the identified at least one measure is a Degradation and / or a change in transmission frequency and / or a This includes changing a transmission channel. This creates, for example, the technical advantage that hacker attacks are prevented. 20 can be efficiently repelled. Degradation, as described, includes a shutdown of the first RSU. Once, the first RSU can spontaneously degrade; then, without The warning system has been deactivated. This cannot be advantageous, because then... 25 motor vehicles, for example, also directly in front of a tunnel or a At critical points, important infrastructure data could be lost. This is intended to prevent data loss. This should not happen. Therefore, according to one embodiment... It is provided that the degradation is preceded by a warning, that the first The RSU is shut down. If it's downgraded with warning, that can... 30 approaching at least partially automated motor vehicles on which configure, for example, driver takeover or similar (emergency stop, trigger speed reduction. The advance warning is, for example, transmitted wirelessly via the radio link using the first RSU. 35 In one embodiment, it is provided that at least one measure a marking of those pieces of information and / or data which are provided by means of the 10 / 24 - 10 - first radio signal transmitted, with a marking which indicates that a problem has occurred. The information and / or data They don't have to be wrong, but in the first RSU and / or in the A problem has occurred in the radio transmission, which can be indicated by the marking 5 is marked. Thus, for example, the technical advantage can be achieved. will be that the motor vehicle which contains the information and / or data receives, can prepare for possible subsequent problems and thus, for example, a Takeover request can be issued to the driver and / or a This can reduce speed. Therefore, it can provide redundancy against failures. 10 random single errors will be caused. For example, it is planned that a change in the transmission frequency will be possible. and / or the transmission channel before switching using the first RSU of the The second RSU is communicated. This means that, for example, a 15 Information message via radio link using the first RSU to the The second RSU is sent, with the information message being sent to the(s). indicates change. The abbreviation "RSU" stands for "Road-Side Unit". The term "Road-Side Unit" 20 can be translated into German as "street-side unit" or "street-side unit". The term "RSU" can be translated as "infrastructure unit". Instead of the term "RSU", other terms can also be used. The following terms are used synonymously: street-side unit, street-side infrastructure unit, communication module, street-side Communication module, street-side radio unit, street-side transmitter station. 25 According to one embodiment of the method, which for example the respective characteristics of the above and / or below described The method, which includes various embodiments, is a computer-implemented Procedure. 30 Technical functionalities of the procedure according to the first aspect result analogous to corresponding technical functionalities of the device according to the second aspect and vice versa. 35 In one embodiment of the method, which, for example, Features of the embodiments described above and / or below 11 / 24 - 11 - It is provided that the procedure is carried out using the device according to the second aspect is carried out or implemented. The abbreviation "bzw." stands for "respectively". "Respectively" means 5, for example, stands for "respective". "Respective" stands for "and / or", for example. The phrase "at least one" means "one or more". It is noted that the embodiments described here and 10 examples that can be combined in any way. Exemplary embodiments of the invention are shown in the drawings and in The following description explains this in more detail. It shows: 15 Fig. 1 a flowchart of a procedure for communicating between a first RSU and a second RSU Fig. 2 a device, 20 Fig. 3 a machine-readable storage medium and Fig. 4 shows a first RSU and a second RSU. Fig. 1 shows a flowchart of a procedure for communicating between 25 a first RSU and a second RSU by means of a radio link between the first RSU and the second RSU, comprising the following steps: Sending 101 a first radio signal via the first RSU to the second RSU, Received 103 at least one transmitted by means of the second RSU 30 parameters of the radio link via the first RSU after the Transmitting 101 of the first radio signal, Determine 105 at least one measure affecting the radio connection based on at least one received parameter using the first RSU, 35 Implement 107 of the identified at least one measure using the first RSU. 12 / 24 - 12 - For example, it is planned that determining the measure will involve a selection. a measure comprises a multitude of different measures. The multitude of different measures is exemplified in a 5 memories of the first RSU stored. Fig. 2 shows a device 201 which is set up to perform all steps of the process. to execute the first aspect. Device 201 is an RSU and will hereinafter referred to as the first RSU. 10 The first RSU 201 includes a first communication interface 203, which is set up to send a first radio signal to a second RSU (not shown). transmit. The second RSU will receive the first radio signal and, based on this, to determine one or more parameters of the radio connection. One of them The second RSU sends 15 or more parameters via a wired connection. Communication connection, for example an Ethernet connection, where the wired communication connection, for example, part of a wired communication network, back to the first RSU 201. The first RSU 201 includes a second communication interface 205, which 20 is set up, one or more parameters via the To receive a wired communication connection. Receiving This occurs after the transmission of the first radio signal. Therefore, the first communication interface 203 as a wireless communication interface or as a radio communication interface 25 can be designated and the second communication interface 205 can be used as a wired communication interface. The first RSU 201 includes a processor 207, which is configured, at least one measure affecting the radio connection based on 30 to determine at least one received parameter, and which one further is set up to implement at least one of the identified measures, i.e. for example, to control and / or coordinate. Fig. 3 shows a machine-readable storage medium 301 on which a 35. Computer program 303 is stored. Computer program 303 comprises Commands issued by computer program 303 during execution 13 / 24 - 13 - Computers, for example through the first RSU 201 of Fig. 2, these cause a procedure to be carried out in accordance with the first aspect. Fig. 4 shows a first RSU 401, which has a first communication interface. 5 403 comprises. The first communication interface 403 is a Wireless communication interface. The first RSU 401 is located in the vicinity of a tunnel 405. A road 407 leads to tunnel 405. 10 Spaced apart from tunnel 405 and therefore also spaced apart from the first RSU 401 A second RSU 409 is stationed on Route 407. The second RSU 409 includes a 411 radio communication interface. 15 The first RSU 401 transmits a first radio signal using the Radio communication interface 403 to the second RSU 409. Thus, a Radio connection, symbolically represented by an arrow with the Reference number 413, between the first RSU 401 and the second RSU 409 built. 20 The second RSU 409 receives the first radio signal using the Radio communication interface 411. Based on the first radio signal The second RSU 409 determines at least one parameter of the radio link 413. 25 Furthermore, Fig. 4 shows a motor vehicle 415, which is traveling in the direction of the second RSU 409 and is heading towards the first RSU 401. It is located there. the second RSU 409 between motor vehicle 415 and the first RSU 401. The motor vehicle 415 can also be positioned between the first RSU 401 and the 30 second RSU 409s are located. The concept described here also works. then and can also be used then. The motor vehicle 415 also has a radio communication interface 417. on. One direction of travel of motor vehicle 415 is indicated by an arrow with the 35 reference mark 418. 14 / 24 - 14 - The second RSU 409 sends at least one parameter which the second RSU 409 determined, using a second radio signal to the Motor vehicle 415. Thus, a radio connection between the Motor vehicle 415 and the second RSU 409 were established. This radio link 5 is symbolically marked with an arrow bearing the reference number 419 and can be described as a second radio link to differentiate it from the radio link between the first RSU 401 and the second RSU 409, which can be described as the first radio connection. 10 The motor vehicle 415 receives via the radio communication interface 417 at least one parameter, even before it is within radio range of the first RSU 401 arrived. Motor vehicle 415 is a motor vehicle which 15 is set up, at least a partially automated driving function To perform such a driving function, it is advantageous if The motor vehicle receives 415 pieces of information which are suitable for the Motor vehicle 415 during the execution of the at least partially automated To support or assist driving functions. Such information includes 20 for example the information mentioned above. It is advantageous if the motor vehicle 415 becomes aware of whether the current Situation requiring the transmission of the necessary information via radio link in a quality required for this purpose is permitted or enabled. The motor vehicle 25 415 can indeed define parameters of a radio connection between the motor vehicle 415 and the first RSU 401, for example, passively and / or actively. To determine this, however, the motor vehicle 415 must be within radio range. the first RSU 401. Provided that the motor vehicle 415 is outside the Within radio range of the first RSU 401, the motor vehicle 415 can 30 parameters cannot be determined by the user. However, because such parameters are determined using the second RSU 409 will be and then connected to the motor vehicle 415 via the second RSU 409 When these parameters are sent, the motor vehicle 415 gains knowledge of them. 35 without being within radio range of the first RSU 401. Accordingly, the motor vehicle 415 can then be based on these 15 / 24 - 15 - Parameters themselves decide whether there is at least a semi-automated Driving function will be allowed in its full range of functions, or only in one. will be limited in scope or even completely deactivated. 5. Furthermore, it may be provided that the second RSU 409 uses the Radio communication interface 411 to send at least one parameter to a Base station 421 transmits using another radio signal. Mobile phone base station 421 is symbolically marked by a cloud symbol. Thus, the second RSU 409 can establish a third radio link to the Build 10 mobile communication stations or base stations 421. Not shown in Fig. 4 are several environmental sensors located in the vicinity of the Tunnels 405 are located and their respective surroundings are recorded. This recording Relevant environmental data can be obtained, for example, using the first RSU 401 15 will be further processed to utilize the 405 existing [elements] in the vicinity of the tunnel. To detect objects. Based on the detected objects, the first RSU 401 creates an object list that includes the detected objects. represented. The first RSU 401 can then be used with radio signals, for example using the first radio signal, which Send the 20 identified object lists to motor vehicles within radio range. the first RSU 401 are located, so that these are based on the object list to the For example, being able to perform at least a partially automated driving function or neither. 25 The concept described here is based on the assumption that the second RSU 409 via a wired communication link, at least one sends parameters back to the first RSU 401. For example, a Ethernet connection between the second RSU 409 and the first RSU 401 provided. This wired communication link is symbolic. 30 marked by lines with the reference number 423. Sending the at least one parameter via this wired connection Communication link 423 is symbolically represented by arrows with the Reference number 427 is marked. 35 The first RSU 401 includes a second communication interface 425, which at least one parameter via the wired connection 16 / 24 - 16 - Communication link 423 is receiving. For clarity, it is not shown. that the second RSU 409 also has a wired connection has a communication interface by means of which at least one Parameters via wired communication link 423 to the 5 first RSU 401 is sent. The first RSU 401 includes a 429 processor, which is based on the at least one parameter, at least one radio connection 413 influencing measure identified and then also the identified measure 10 carries out. For example, at least one parameter includes a signal strength of the first radio signal. For example, the 429 processor compares this Signal strength with a signal strength threshold. Provided the signal strength of the 15. The first radio signal is less than or equal to the signal strength threshold. The processor 429 will control the communication interface 403 in such a way that This increases the signal strength of the first radio signal. The concept therefore includes, for example, a wired return direction. to provide 20 units from the first RSU 409 to the first RSU 401, in order to replace the ones from the second RSU 409 measured or determined parameter again to the first to return the RSU 401. The first RSU 401 can be determined from these measurements. Derive measures. 25 examples of measured parameters are, for example, the following: Signal strength The second RSU 409 measures the signal strength of the received first signal. 30 radio signals. If the signal strength is too weak, the first RSU 401 can be used as Measure to increase transmission power in order to improve radio link 413 to stabilize. Latency(ies) 35 17 / 24 - 17 - The second RSU 409 measures the latency of the incoming first one. Radio signals resulting from radio link 413. If the signal is too high Latency, which can result from environmental influences, for example, can... first RSU 401 as a measure through targeted, timely degradation 5 or other measures to react. A change in radio- The transmission frequency or of a radio transmission channel can be, for example, This change can then extend to the motor vehicle 415. continue. (A frequency change will be assigned to motor vehicle 415 or the second RSU 409, for example, was announced in good time. 10 Packet loss (number of bit errors) The second RSU 409 evaluates the number of [missing information] based on the first radio signal. Bit errors and / or lost packets. If the number of bit errors is too high, 15 the first RSU 401 as a measure through targeted timely degradation and / or take further measures, especially before the Motor vehicle near tunnel 405 comes. 20 Hacker attack (security) If the second RSU 409 shows inconsistencies in the package order and / or in The certificates transmitted by the first radio signal can be recognized by the certificates included in the transmitted certificates. second RSU 409 the first RSU via the wired connection 25. Communication link 423 warns. This can then be used as a measure(s). in turn, measures such as changing the channel and / or frequency and / or initiate timely degradation. The communication link 423 between the first RSU 401 and the 30 second RSU 409 for the purpose of transmitting the parameter of the first Radio link 413 is wired, due to the current situation. There may be resulting reasons that a wireless Communication link, for example a radio link, for the purpose of The transmission of the parameter will be affected just as negatively as the first 35 Radio connection 413. 18 / 24 - 18 - An example of negative effects on the first radio link 413 can be The following could be the cause: Disturbances caused by environmental influences such as, for example, electricity Magnetic interference or reflections can disrupt the initial radio connection 413 between the first RSU 401 and the second RSU 409 may be disrupted. In 5 In this case, a wireless return direction would most likely also be possible, so wireless communication link between the second RSU 409 and the The first RSU 401 was disrupted for the purpose of transmitting the parameter. The above The measures described could then not be taken by the first RSU 401 to be taken, since they have no knowledge of the parameter of the first 10 radio links 413 have. The 423 communication link increases security against cyber threats. Attacks. The 423 communication line also results in a higher risk of attacks. System availability, which means that part of a functional system is available. 15 Security requirements, for example, a legislative requirement The security requirement has been met. 19 / 24

Claims

- 19 - Patent claims 5 1. Procedure for communicating between a first RSU (201, 401) and a second RSU (409) by means of a radio link (413) between the first RSU (201, 401) and the second RSU (409), comprising the following steps: Sending (101) a first radio signal using the first RSU (201, 401) to the 10 second RSU (409), Received (103) at least one transmitted by means of the second RSU (409) Parameters of the radio link (413) via the first RSU (201, 401) in time after the first radio signal is sent, Determine (105) at least one of the radio links (413) that are affecting 15 Measure based on at least one received parameter by means of the first RSU (201, 401), Implementing (107) the identified at least one measure by means of the first RSU (201, 401). 20 2. Method according to claim 1, wherein the at least one parameter is selected The following group of parameters includes: transmission frequency, transmission power, Signal strength, latency, number of bit errors, number of packet losses, Duration of a transmission operation between the first RSU (201, 401) and the second RSU (409), status of standardized congestion control 25 mechanisms, number of radio participants, channel access time, bandwidth, Security assessment of the second RSU (409), how secure the radio link (413) is.

3. Method according to claim 1 or 2, wherein the at least one parameter 30 using the first RSU (201, 401) each with a respective predetermined The parameter threshold is compared, whereby at least one measure is taken. is determined depending on the comparison.

4. Method according to claims 2 and 3, wherein the at least one parameter 35 includes a signal strength which is measured by means of the first RSU (201, 401) with a Signal strength threshold as a respective predetermined parameter threshold 20 / 24 - 20 - a comparison is made, whereby at least one of the identified measures involves an increase. a transmission power is included if the comparison has shown that the Signal strength less than or less than the signal strength threshold.

5. Procedure according to one of the preceding claims insofar as it relates back to the Claims 2 and 3, wherein the at least one parameter is a latency time includes which, by means of the first RSU (201, 401), with a Latency threshold as a respective predetermined parameter threshold a comparison is made, whereby the identified measure is at least one 10 Degradation or a change in transmission frequency and / or a Changing a transmission channel includes, if the comparison has shown, that the latency is greater than or equal to the latency threshold.

6. Method according to one of the preceding claims insofar as it relates back to the 15 Claims 2 and 3, wherein the at least one parameter is a number of Bit errors are included, which are detected using the first RSU (201, 401) with a Bit error count threshold as a respective predetermined value The parameter threshold is compared, whereby the determined value is at least one A measure includes degradation if the comparison has shown that the 20 Number of bit errors greater than or equal to the bit error count threshold is.

7. Method according to one of the preceding claims insofar as it relates back to the Claims 2 and 3, wherein the at least one parameter is a number of 25 packet losses are included, which are recovered using the first RSU (201, 401) with a Packet loss count threshold as a respective predetermined value The parameter threshold is compared, whereby the determined value is at least one A measure includes degradation if the comparison has shown that the Number of packet losses greater than or equal to the The packet loss threshold is 30.

8. Procedure according to one of the preceding claims insofar as it relates back to Claim 2, wherein the at least one parameter is a safety assessment the second RSU (409) includes how secure the radio link (413) is, whereby 35 the identified at least one measure a degradation and / or a change 21 / 24 - 21 - a transmission frequency and / or a change of transmission channel includes.

9. Method according to any of the preceding claims, wherein the determined 5 at least one parameter via a wired communication network is received via the first RSU (201, 401).

10. Device (201), in particular RSU (201, 401), which is configured to to perform the steps of the procedure according to one of the preceding claims. 10 11. Computer program (303), comprising instructions which, when executed, computer program (303) by means of a computer cause it to do a To carry out a method according to any one of claims 1 to 9. 15 12. Machine-readable storage medium (301) on which the computer program (303) is stored according to claim 11. 22 / 24