A method for configuring a communication system to characterize the number of transmission channels of a radio signal emitted by an access point belonging to the communication system, intended to be allocated to a corresponding user equipment, device, and computer program.

Abstract

Method for configuring a communication system to characterize the number of transmission channels of a radio signal emitted by an access point belonging to the communication system intended to be allocated to a corresponding user equipment, device and computer program. The invention relates to a method for configuring a communication system comprising at least one access point of a telecommunications network comprising: the determination, for at least one user equipment located within a geographical area served by the access point and intended to receive a radio signal emitted by the access point with a given quality of service and a given throughput, of a number of transmission channels of the radio signal intended to be allocated to said user equipment as a function of at least: a value of an emission power of at least one transmission channel of the radio signal;and a representative value of a density of reconfigurable smart surfaces, capable of broadcasting the radio signal emitted by the access point to the user equipment, located within the geographical area; the modification of at least one of these values ​​depending on the number of transmission channels determined. Figure for the abbreviation: Fig. 1.;

Description

Title of the invention: Method for configuring a communication system to characterize the number of transmission channels of a radio signal emitted by an access point belonging to the communication system, intended to be allocated to a corresponding user equipment, device, and computer program. Technical field

[0001] The present invention belongs to the general field of wireless communication systems.

[0002] It relates more particularly to a method of configuring a communication system allowing the number of transmission channels of a radio signal emitted by an access point belonging to the communication system to be allocated to a user equipment served by the access point knowing the rate and quality of service with which data transmitted by the access point are received by the user equipment.

[0003] It also relates to an electronic device configured to implement such a process. Previous technique

[0004] In a manner known per se, a reconfigurable intelligent surface, hereinafter referred to as "RIS" (an acronym for the Anglo-Saxon expression "Reconfigurable Intelligent Surface") for the sake of brevity, can be defined as a relay configured to receive an incident signal from a transmitter and reflect it in a specific direction. It is generally considered to be a "full duplex" type relay, that is to say, one that allows simultaneous uplink and downlink communication.

[0005] To this end, a RIS comprises a large number of low-cost passive reflective elements, hereafter referred to as "reflection elements," whose respective reflective properties can be modified to improve the performance of a telecommunications network. In particular, the signals reflected by the RIS can be combined constructively to improve the power level of the signal received by a receiver. By deploying RISs in a network and intelligently configuring their reflections, the wireless propagation channels between the transmitter and the receiver can then be dynamically configured to obtain the desired distributions and gains. This configuration of the propagation channels makes it possible to improve spectral efficiency and network coverage, but also to to address the problem of interference and signal attenuation in a wireless network.

[0006] Le document suivant décrit plus en détail le fonctionnement d'une RIS : "Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How it Works, State of Research, and RoadAhead", M. D. Renzo, A. Zappone, M. Debbah, M. Alouini, C. Yuen, J. D. Rosny, and S. Tretyakov, IEEE Journal on Selected Areas in Communications, pages 2450-2524, 2020.

[0007] In practice, such an RIS is designed to passively reflect incident radio signals, that is, without amplifying said incident radio signals by amplifiers (neither by low-noise amplifiers nor by power amplifiers). By modifying the reflection properties of each reflection element of the RIS, typically by individually modifying the phase shift introduced by each of these reflection elements, it is possible to influence how the incident radio signals are reflected by the RIS and, ultimately, to influence the propagation channel used by these radio signals.

[0008] For this reason, an RIS is an effective means of enabling data exchange between a network access point, such as a base station, and geographical areas that would otherwise remain poorly (or not at all) served. This aspect is illustrated, for example, by [Fig. 1], which schematically represents an example of a wireless communication system using an RIS.

[0009] As illustrated in [Fig. 1], the wireless communication system comprises a base station 11 installed on the roof of a building, which must exchange data (over a downlink and / or an uplink) with user terminals 13 located in a geographical area ZG to be served. In this example, the direct paths between the base station 11 and the geographical area ZG to be served are obstructed by buildings, so that the radio signals traveling along these direct paths are severely attenuated, or even blocked.

[0010] By placing the RIS 12 on an adjacent building, it is possible to introduce an additional reflection of the incident radio signals by the RIS located on that adjacent building, thus creating an indirect path between the geographic area ZG and the base station 11, via the RIS 12. To this end, a management device (not shown in [Fig. 1], and for example integrated into the base station 11) determines appropriate phase shifts of the reflection elements of the RIS 12 to allow the latter to serve the geographic area ZG. Once determined, these phase shifts are transmitted to the RIS 12 via a backhaul network. A control module for the RIS 12 allows then to control the elements of reflection so that they introduce phase shifts corresponding to those determined by the management system.

[0011] The advantages of using a RIS are not limited to the ability to serve areas that would otherwise remain poorly (or not at all) served. Indeed, the energy consumption of an RIS is negligible compared to that of a base station. Furthermore, an RIS is simpler to install from a technical and regulatory standpoint. All these aspects justify the great interest in this technology and the desire of operators to accelerate its development, particularly in the context of the deployment of 5G-Advanced or 6G wireless communication systems, which are especially suited to the context of spatial multiplexing of different user terminals ("multi-user multiple input multiple output", MU-MIMO in Anglo-Saxon terminology).

[0012] Thus, there is a need for a solution that takes into account the impact of RIS deployment on base station performance, particularly with regard to the allocation of radio signal transmission channels to the various user equipment served by the base station. Description of the invention

[0013] The invention notably addresses this need by proposing a method for configuring a communication system comprising at least one access point of a telecommunications network.

[0014] Such a configuration method comprises: - the determination, for at least one user device located within a geographical area served by the access point and intended to receive a radio signal emitted by the access point with a given quality of service and a given throughput, of a number of radio signal transmission channels to be allocated to said user device based on at least: • a transmission power value for at least one radio signal transmission channel; and • a representative value of a density of reconfigurable smart surfaces, capable of broadcasting the radio signal emitted by the access point to the user equipment, located within the geographical area; - the modification of at least one of these values ​​depending on the number of transmission channels determined.

[0015] Correspondingly, the invention also relates to an electronic management device configured to implement the method of configuring a communications system according to the invention.

[0016] In particular implementations, the electronic management device is embedded in an access point of a telecommunications network.

[0017] The access point of the telecommunications network is, for example, a base station (also called a gNB in ​​the context of a 5G network), a Wi-Fi access point, etc. It can be a hardware entity or a software entity, which can be distributed over one or more network functions or be hosted by one or more hardware devices.

[0018] The invention can advantageously be implemented so as to dynamically adapt, when the communication system is already deployed, and / or to estimate, when the communication system is not yet deployed, the number of radio signal transmission channels to be allocated to said user equipment. The invention can also be implemented to adapt the communication system, in particular the transmission power and / or the RIS, to achieve a given quality of service, and in particular a target data rate.

[0019] To this end, the present solution proposes to take into account all the RISs deployed in the communication system, rather than the impact of a single RIS as is the case in the prior art. The invention takes this plurality of RISs into account by means of their density of presence within the communication system.

[0020] In the remainder of this document, the density of RISs presence refers to the number of RISs present per unit area of ​​the geographic zone served by the access point. In the communication system considered, the number of RISs present within the geographic zone served by the access point can be on the order of hundreds or even thousands.

[0021] The number of radio signal transmission channels intended to be allocated to said user equipment calculated during the implementation of this configuration method depends on several factors specific to the access point and the environment in which the radio signals emitted by the access point are transmitted, including the transmission power of the access point distributed per radio signal transmission channel and the density of reconfigurable intelligent surfaces or RISs present within the communication system.

[0022] Thus, by cleverly modifying one and / or the other of the values ​​of the transmission power of the transmission channels of the radio signal emitted by the access point and of the density of RISs within the communication system it is possible to configure the number of transmission channels of the radio signal intended to be allocated to said user equipment by the access point while optimizing the transmission power of the access point while maintaining a quality of service in reception and a receive throughput at a given value, set for example by the operator of the telecommunications network to which the communication system belongs.

[0023] In particular implementations, when the number of transmission channels is greater than or equal to a first threshold, the modification consists of a reduction in the value of the transmission power of at least one transmission channel of the radio signal and / or a reduction in the number of transmission channels allocated to the user equipment and / or a reduction in the number of reconfigurable smart surfaces within the geographical area.

[0024] When the number of radio signal transmission channels allocated to said user equipment is greater than or equal to a first threshold, this means that the number of radio signal transmission channels allocated to said user equipment exceeds a target value, set, for example, by the telecommunications network operator to which the access point belongs. It is then advantageous to reduce the transmission power of at least one radio signal transmission channel emitted by the access point and / or to reduce the number of radio signal transmission channels in order to reduce the access point's energy consumption. It may also be decided to reduce the number of RISs involved in transmitting the radio signals emitted by the access point, for example, by individually modifying the phase shift introduced by the reflecting elements of one or more RISs.

[0025] In particular implementations, when the number of transmission channels is less than or equal to a second threshold, the modification consists of an increase in the transmission power of at least one transmission channel of the radio signal and / or an increase in the number of transmission channels allocated to the user equipment and / or an increase in the number of reconfigurable smart surfaces within the geographical area.

[0026] When the number of radio signal transmission channels intended to be allocated to said user equipment is less than or equal to a second threshold, this means that the number of radio signal transmission channels intended to be allocated to said user equipment is less than a target value, set, for example, by the telecommunications network operator to which the access point belongs. It is then advantageous to increase the transmission power of at least one radio signal transmission channel emitted by the access point and / or to increase the number of radio signal transmission channels and / or to increase the number of RISs involved in the transmission of the radio signals emitted by the access point, for example, by individually modifying the phase shift introduced by the reflecting elements of one or more RISs.

[0027] It should be noted that the second threshold may be equal to the first threshold. In this case, the value of the emission power and / or the value of the RIS density is

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[0041] modified when the number of radio signal transmission channels intended to be allocated to said user equipment is strictly less than the second threshold. In specific implementations, the distribution of reconfigurable smart surfaces within the geographical area is homogeneous. In other words, this means that the RIS density is the same at every point on the surface of the geographical area served by the access point. This scenario provides a first approximation of the number of radio signal transmission channels to be allocated to the user equipment. This is particularly useful when the telecommunications network operator is considering the deployment of new communication systems. In specific implementations, the distribution of reconfigurable smart surfaces within the geographical area is heterogeneous. In other words, this means that the density of RIS varies depending on one's location within the geographic area served by the access point. Thus, some parts of the geographic area may be more densely equipped with RIS than others. This can be the case, for example, when part of the geographic area is an urban area containing buildings that can interfere with the transmission of radio signals emitted by the access point. In specific implementations, the number of transmission channels Nsc of the radio signal intended to be allocated to said user equipment is expressed as: NSC — “ ~ \ Wsc Log2[l—^r^- ) where O is the rate at which the data transmitted by the access point is received by the user equipment, 9 is the probability of not reaching the given flow rate D, Psc is the transmit power value of a radio signal transmission channel. is the bandwidth of a radio signal transmission channel, ^thsc characterizes the thermal noise measured at the user equipment for a bandwidth Wsc, and D characterizes the total power loss, between the access point and the user equipment, of the emitted radio signal calculated taking into account the density of reconfigurable smart surfaces within the geographical area. Such a probability 9 is a probability of non-coverage, it represents the probability that a quality of service will not be achieved in a given geographical area and / or for a given bandwidth.

[0042] According to a second aspect, the invention relates to a communication system comprising at least one access point of a telecommunications network serving a geographical area within which are located: - at least one user device communicating with the access point; and - a plurality of reconfigurable smart surfaces capable of broadcasting a radio signal emitted by the access point to the user device; said communication system further comprising at least one electronic management device according to the invention.

[0043] The configuration method, the electronic management device, and the communication system according to the invention have the same advantages mentioned above as the configuration method according to the invention.

[0044] The invention also relates to a computer program on a recording medium, this program being capable of being implemented in a computer or more generally in an electronic management device according to the invention and comprising instructions adapted to the implementation of a configuration method as described above.

[0045] This program may use any programming language, and be in the form of source code, object code, or code intermediate between source code and object code, such as in a partially compiled form, or in any other desirable form.

[0046] The invention also relates to an information medium or a recording medium readable by a computer, and comprising instructions for a computer program as mentioned above.

[0047] The information or recording medium can be any entity or device capable of storing programs. For example, the medium may include a storage means, such as a ROM, for example a CD-ROM or a microelectronic circuit ROM, or a magnetic recording means, for example a hard disk drive, or a flash memory.

[0048] On the other hand, the information or recording medium can be a transmissible medium such as an electrical or optical signal, which can be transmitted via an electrical or optical cable, by radio link, by wireless optical link or by other means.

[0049] The program according to the invention can in particular be downloaded onto an Internet-type network.

[0050] Alternatively, the information or recording medium may be an integrated circuit in which a program is incorporated, the circuit being adapted to execute or to be used in the execution of the configuration and communication methods according to the invention.

[0051] It can also be envisaged, in other embodiments, that the configuration process, the electronic management device and the communication system according to the invention present in combination all or part of the aforementioned characteristics. Brief description of the drawings

[0052] Other features and advantages of the present invention will become apparent from the description below, with reference to the accompanying drawings, which illustrate an example of an embodiment without being limiting in any way. In the figures:

[0053] [Fig-1] [Fig.1], already described, schematically represents an example of a system of wireless communication according to the state of the art, in which a single RIS is used to serve a given geographical area;

[0054] [Fig.2] [Fig.2] schematically represents a wireless communication system according to a particular embodiment of the invention;

[0055] [Fig.3] [Fig.3] represents modules embedded in a management device, such as the management device belonging to the system of [Fig.2], according to an example of implementation of the invention;

[0056] [Fig.4] [Fig.4] schematically represents an example of the hardware architecture of a management device belonging to the wireless communication system of [Fig.3];

[0057] [Fig.5] [Fig.5] represents, in the form of a flowchart, a particular method of implementing a configuration process, for example executed by the electronic device of [Fig.4],

[0058] [Fig.6] [Fig.6] represents the geographical area served by the base station. Description of the implementation methods

[0059] Fig. 2 schematically represents a wireless communication system 20 according to a particular embodiment of the invention.

[0060] In Figure 2, the wireless communication system 20 comprises a base station-type access point 21, which can exchange data with user terminals located in a geographical area ZG to be served. The wireless communication system further comprises a plurality of RISs, namely four RISs 20_1, 20_2, 20_3 and 20_4 (hereafter denoted as 20_j = L4).

[0061] As illustrated by Figure 2, at least some of the radio signals from base station 21 can reach the geographical area ZG by being previously reflected by the RISs 20_ / = L4 and vice versa, depending on whether the direction is up or down considered.

[0062] The presence of these different RISs 20_ J = L4 makes it possible to increase the number of direct and indirect paths that can be used between said base station 21 and a user device.

[0063] The plurality of RISs belonging to system 20 form a set of RISs hereinafter referred to as "set E". Such a set E may comprise one or more hundred RISs.

[0064] In a first implementation variant, the distribution of reconfigurable smart surfaces within the geographical area ZG is homogeneous.

[0065] In other words, this means that the density of RISs is the same at every point on the surface of the geographical area ZG served by base station 21.

[0066] In a second implementation variant, the distribution of reconfigurable smart surfaces within the geographical area ZG is heterogeneous.

[0067] This means that the density of RISs varies depending on the position within the surface of the geographical area ZG served by base station 21. Thus, some portions of the geographical area may be more densely equipped with RISs than others.

[0068] Following similar considerations, the system 20 may also comprise a plurality of base stations, and each base station may serve one or more communication cells. In practice, the principles described below can be extended by those skilled in the art to such configurations. In particular, an example is described here in which the access point is a base station serving one or more cells. Alternatively, such an access point is a Wi-Fi or other access point serving a geographical area.

[0069] User equipment can, for example, take the form of a mobile phone, such as a smartphone, a tablet, a laptop, a personal digital assistant, a smartwatch, an e-reader, etc. Generally speaking, there are no limitations attached to the form taken by user equipment.

[0070] In addition, each RIS includes a control module (not shown in the figures) and reflection elements (not shown in the figures) whose reflection properties can be modified by the control module so as to influence how radio signals incident on said reflection elements are reflected by them.

[0071] As explained in more detail below, a number of Nsc transmission channels of the radio signal intended to be allocated to a user equipment 23, located within the geographical area ZG served by the base station 21 and intended to receive data from the base station with a given throughput and a given quality of service is determined.

[0072] In this regard, in one embodiment of the present invention, the RISs of assembly E are considered to be mobile—that is, their position within the geographical area ZG and / or their orientation can vary. These changes in position and / or orientation are, for example, carried out manually by an operator, or by using means that allow the RISs to change position and / or orientation. By "change of position," we mean a movement of the RISs in a plane defined by the ground and / or a change in their height. Their respective positions result from such a procedure, which consists of searching for suitable locations, while ensuring that the path gain of the signals between the base station 21 and the user equipment 23 is optimized (or at least ensuring that this gain is greater than a threshold value, which may or may not be predetermined).

[0073] As indicated above, the wireless communication system 20 also includes an electronic management device 22 configured to determine the number of Nsc transmission channels of the radio signal intended to be allocated to a user equipment 23, by implementing a configuration method according to the invention.

[0074] As illustrated in [Fig. 2], the management device 22 is an electronic device separate from the RISs of assembly E and from the base station 21. In particular embodiments, the management device is equipment that takes, for example, the form of a mobile phone, such as a smartphone, a tablet, a laptop, or a personal digital assistant. Alternatively, this management device 22 is, for example, integrated into the base station 21.

[0075] Fig. 3 represents modules embedded in a management device, such as the management device 22 belonging to the system 20 of Fig. 2, according to an example of an implementation of the invention.

[0076] As illustrated by Figure 3, the management device 22 includes in particular a M0D_DET module for determining a number of transmission channels Nsc of the radio signal intended to be allocated to a user equipment 23, and a MOD_PROC module for processing the number of transmission channels / Vw, the functionalities of which are described in more detail with reference to [Fig.5].

[0077] Fig. 4 schematically represents an example of the hardware architecture of the management device 22 belonging to the system 20 of Fig. 2.

[0078] As illustrated in [Fig. 4], the management device 22 has the hardware architecture of a computer. Thus, the management device 22 includes, in particular, a processor 1, a random access memory 2, a read-only memory 3 and a non-volatile memory 4. It also has communication means 5.

[0079] The read-only memory 3 of the management device 22 constitutes a storage medium according to the invention, readable by the processor 1, on which a computer program PROG according to the invention is stored, comprising instructions for executing steps of the configuration process. The PROG program defines functional modules of the management device 22, which rely on or control the hardware elements 1 to 5 of the management device 22 mentioned above. These functional modules are illustrated in [Fig. 4] by way of no limitation, and are described in more detail below with reference to different embodiments.

[0080] In specific implementation modes, the communication means 5 enable the management device 22 to exchange data with any equipment of the wireless communication system 20, including the RISs 20_j of assembly E, via a telecommunications network. To this end, the communication means 5 comprise a wired or wireless communication interface capable of implementing any suitable protocol known to those skilled in the art.

[0081] Fig. 5 represents, in flowchart form, a particular mode of implementation of the configuration process executed by the management device 22.

[0082] In this implementation, the configuration process includes a first step S100 during which the impact of the deployment of RISs within the geographical area ZG on the transmission of radio signals between the base station 21 and the user equipment 23 is determined. This impact of the RISs is characterized by the two parameters Jd and Q. This step is implemented, for example, by the MOD_DET module of the management device 22.

[0083] When the distribution of RISs within the geographical area ZG is homogeneous, the parameter Jd is expressed as follows: Or, jd being a complex number:

[0084] In this expression, 7 is a parameter representing a power loss of the transmitted radio signal as a function of the distance separating the base station and the user equipment, Kr is a factor characterizing the amplitude of the signal reflected by an RIS, r and 0 are the polar coordinates of any point in a cylindrical coordinate system within the geographical area ZG, and d represents the distance

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[0091] between base station 21 and user equipment and & represents the wave number of the emitted radio signal. Figure 6 represents the geographical area ZG served by base station 21. In this figure 6, Rc is the maximum radius of the geographical area ZG, r represents the distance separating base station 21 and an RIS and r' represents the distance separating an RIS from user equipment 23. The parameter Ï2 is then expressed as follows: Q = 7 + ^ + 2 < J ÇbAd^ ) In this expression, Kt is a factor characterizing the power loss between base station 21 and user equipment 23, e7 is the value of the RIS density within the geographical area ZG. When the distribution of RISs within the geographical area ZG is heterogeneous, the parameter Jr is expressed as follows: — i or Jj being a complex number: J} | | where Jri and others express themselves: t1 = — [A f 4-- 4- 2 M IG IX s Md — C- U

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[0098] Once the values ​​of parameters Jr and Q have been obtained, the configuration process includes an S200 step during which the number of Nsc transmission channels of the radio signal to be allocated to a user device 23 is determined. This step is implemented, for example, by the M0D_DET module of the management device 22. The number of Nsc transmission channels of the radio signal intended to be allocated to a user device 23 is expressed as follows: Nsc = where D is the rate at which the data transmitted by the access point is received by the user equipment, 9 is the probability of not reaching the given flow rate D, PSc is the transmit power value of a radio signal transmission channel. is the bandwidth of a radio signal transmission channel,

[0099] ^thsc characterizes the thermal noise measured at the user equipment level for a bandwidth Wsc, and

[0100] characterizes the total power loss, between the access point and the user equipment, of the emitted radio signal calculated taking into account the density of reconfigurable smart surfaces within the geographical area.

[0101] The number of transmission channels Nsc is then compared to a first threshold SI. This processing step S300 of the number of transmission channels ^V^ is implemented for example by the MOD_PROC module of the management device 22.

[0102] When the number of transmission channels / V^ is greater than or equal to the first threshold SI, this means that the number of transmission channels iVsc is greater than a target value, set for example by the telecommunications network operator to which base station 21 belongs.

[0103] In such a case, it is then advantageous to reduce the transmission power of at least one transmission channel of the radio signal emitted by base station 21 in order to reduce the energy consumption of the latter and / or to reduce the number of transmission channels allocated to the user equipment.

[0104] It may also be decided to reduce the number of RISs involved in the transmission of radio signals emitted by base station 21. Such a reduction in the number of RISs involved in transmission may result in a reduction in the number of RISs within the geographical area. Such a reduction in the number of RISs may, in turn, result, for example, in a modification of the phase shift introduced by the reflecting elements of one or more RISs, and / or in the relocation of certain RISs to another portion of the geographical area ZG or even outside of it.

[0105] An S400 processing step is then implemented. It comprises: - a transmission, to the control modules of the various RIS, of an instruction aimed at adapting the orientations of the reflecting elements of the various RIS in accordance with the determined positioning data, and / or - a transmission, to the control modules of the various RIS, of an instruction aimed at adapting the radioelectric properties of the reflecting elements to modify the phase angle of the various RIS, and / or - a transmission, to the control modules of the various RIS, of an instruction aimed at adapting the impedance of the reflecting elements to modify the phase of the radio signal reflected by the RIS, and / or - when the RISs are mobile and / or are positioned on means allowing the RIS to move, a transmission, destined for the control modules of the different RIS, of an instruction aimed at adapting the positions of the different RIS.

[0106] When the number of transmission channels / V^ is less than the SI threshold, this means that the number of transmission channels Nsc is less than a target value, set by the telecommunications network operator to which base station 21 belongs.

[0107] It is then advantageous to increase the transmission power of at least one transmission channel of the radio signal emitted by the base station 21 and / or to increase the number of transmission channels allocated to the user equipment and / or to increase the number of RISs involved in the transmission of the radio signals emitted by the base station.

[0108] It may also be decided to increase the number of RISs involved in the transmission of radio signals emitted by base station 21. Such an increase in the number of RISs involved in transmission may result in an increase in the number of RISs within the geographical area ZG. Such an increase in the number of RISs may, in turn, result, for example, in a modification of the phase shift introduced by the reflecting elements of one or more RISs, and / or in the relocation of certain RISs to a given portion of the geographical area ZG, or even the introduction into the geographical area ZG of RISs originating from another adjacent geographical area.

[0109] A processing step S400' is then implemented. It comprises: - a transmission, to the control modules of the various RIS, of an instruction aimed at adapting the orientations of the reflecting elements of the various RIS in accordance with the determined positioning data, and / or - a transmission, to the control modules of the various RIS, of an instruction aimed at adapting the radioelectric properties of the reflecting elements to modify the phase angle of the various RIS, and / or - a transmission, to the control modules of the various RIS, of an instruction aimed at adapting the impedance of the reflecting elements to modify the phase of the radio signal reflected by the RIS, and / or - when the RISs are mobile and / or are positioned on means allowing the RIS to move, a transmission, to the control modules of the different RISs, of an instruction aimed at adapting the positions of the different RISs.

[0110] It should be noted that the second threshold S2 may be equal to the first threshold SI. In this case, the value of the transmission power of at least one transmission channel the radio signal and / or the number of transmission channels allocated to the user equipment and / or the RIS density value is modified when the number of ATwest transmission channels is strictly less than the second threshold S2.

Claims

Demands

1. A method for configuring a communication system comprising at least one access point of a telecommunications network, said method comprising: - determining, for at least one user equipment located within a geographical area served by the access point and intended to receive a radio signal emitted by the access point with a given quality of service and a given throughput, a number of radio signal transmission channels to be allocated to said user equipment based on at least: • a value of a transmission power of at least one radio signal transmission channel; and • a value representing a density of reconfigurable smart surfaces, capable of broadcasting the radio signal emitted by the access point to the user equipment, located within the geographical area; - modifying at least one of these values ​​based on the number of transmission channels determined.

2. Configuration method according to claim 1 wherein, when the number of transmission channels is greater than or equal to a first threshold, the modification consists of a reduction in the value of the transmission power of at least one transmission channel of the radio signal and / or a reduction in the number of transmission channels allocated to the user equipment and / or a reduction in the number of reconfigurable smart surfaces within the geographical area.

3. Configuration method according to claim 1 wherein, when the number of transmission channels is less than or equal to a second threshold, the modification consists of an increase in the transmission power of at least one transmission channel of the radio signal and / or an increase in the number of transmission channels allocated to the user equipment and / or an increase in the number of reconfigurable smart surfaces within the geographical area.

4. A configuration method according to any one of the preceding claims wherein the distribution of reconfigurable smart surfaces within the geographical area is homogeneous.

5. A configuration method according to any one of claims 1 to 3 wherein the distribution of reconfigurable smart surfaces within the geographical area is heterogeneous.

6. A configuration method according to any one of the preceding claims wherein the number of transmission channels Nsc of the radio signal intended to be allocated to said user equipment is expressed as: NSC — / \ where O is the rate at which the data transmitted by the access point is received by the user equipment, 9 is the probability of not reaching the given rate, Psc is the value of the transmit power of a transmission channel of the radio signal, W5C is the bandwidth of a transmission channel of the radio signal, Nthsc characterizing the thermal noise measured at the level of the user equipment for a bandwidth Wsc, and characterizing the total power loss, between the access point and the user equipment, of the transmitted radio signal calculated taking into account the density of reconfigurable smart surfaces within the geographical area.

7. Electronic management device configured to implement the method for configuring a communications system according to any one of claims 1 to 6.

8. Access point of a telecommunications network comprising at least one electronic device according to claim 7.

9. Communication system comprising at least one access point of a telecommunications network serving a geographical area within which are located: - at least one user device communicating with the access point; and - a plurality of reconfigurable intelligent surfaces capable of broadcasting a radio signal emitted by the access point to the user device;

10. said communication system further comprising at least one electronic management device according to claim 7. Computer program comprising instructions for implementing a method of configuring a configuration system according to any one of claims 1 to 6, when said program is executed by a computer.

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