FR3075547A1 - DEVICE AND METHOD FOR RESOURCE PLANNING, IMPLEMENTED IN A CLOUD NETWORK COMPRISING A WIRELESS ACCESS NETWORK, ON DETECTION OF A TRIGGER EVENT - Google Patents

Abstract

 This method includes the steps of:  - obtaining at least a first performance indicator of a resource for connection to the wireless access network;  - obtaining at least a second performance indicator for a cloud network processing resource;  - selection of at least one connection resource as a function of at least a first or at least a second performance indicator;  selection of at least one processing resource as a function of the connection resource or resources selected in the previous step, and of at least a first or at least a second performance indicator;  - and at least one step from:  ○ sending of at least one planning command for a resource for connection to the wireless access network to a device allowing this planning;  ○ sending at least one scheduling command for a cloud network processing resource to a device allowing this second scheduling.

Description

Invention background

The invention relates to the general field of telecommunications.

It relates more particularly to the management of connection and processing resources in a wireless access network.

In 4th generation or earlier generation cellular access networks, a base band unit (BBU) is associated with each access point to the network. A network access point can be called Remote Radio Header (RRH) such as an antenna of an advanced Node B (eNodeB) for 4G networks. Physically, the BBU unit is placed in direct wire connection with the remote radio head RRH with which it is associated. In a typical implementation, the BBUs are deployed in boxes at the foot of the antenna.

In such networks, we may find ourselves in a situation in which a BBU unit rejects a new connection request from a User Equipment UE (User Equipment) or degrades the quality of a service intended for another UE connected because the The capacity of this BBU does not allow it to handle the new request or because the radio resources of a cell are limited, while another cell is available and able to process this new request. Resource management is therefore not optimal.

The concept of virtual machines was introduced in the 1970s, and then the concept of cloud networks, called Cloud, was introduced in the 1990s.

FIG. 1 illustrates a C-RAN (Cloud-Radio Access Network, also called Centralized-Radio Access Network) architecture of the prior art which implements the concept of cloud networks for radio type wireless access networks. The processing units BBU1, BBU2, BBU3 and the server S are shared. Physically, the processing unit can be placed near a remote radio head (RRH1, BBU1), or elsewhere in the radio access network (RRH1, BBU2), or even in another segment of the network (RRH3, S). The functionality of a processing unit is provided by dedicated physical machines or by virtual machines distributed in the cloud, whether in the access network or in another segment of the metro or core network. Data transmission between the remote radio heads and the processing units is generally established over optical fiber. The implementation of functionality in a cloud network is one of the foundations of wireless networks of future generations.

Cloud resource sharing improves resource optimization over networks in which resources are decentralized. However, given the evolution of wireless access networks and their constraints, better optimization of network resource planning is necessary. Indeed, the evolution of traffic on wireless access networks is marked by an exponential growth in the number of user equipment, in particular in ΜΙΜΟ (Multi-Input Multi-Output) systems, and in the amount of traffic carried by the network, in particular a percentage increase in baseband consuming video data compared to other types of data. Functionalities relating to an access network are caused to be executed in a cloud network. Therefore, there is a need for an improved method of planning connection and processing resources which responds to these developments.

Subject and summary of the invention

The invention thus relates to a resource planning method implemented in a cloud network comprising a wireless access network, this method comprising the steps of:

- obtaining at least a first performance indicator of a resource for connection to the wireless access network;

- obtaining at least a second performance indicator for a cloud network processing resource;

- selection of at least one connection resource as a function of at least a first or at least a second performance indicator, obtained previously;

Selection of at least one processing resource as a function of the connection resource or resources selected in the previous step, and of at least a first or at least a second performance indicator;

- and at least one of the steps from:

o sending at least one command to schedule a connection resource to a device allowing the planning of a connection resource; and o sending at least one command for scheduling a processing resource to a device allowing the scheduling of a processing resource.

The invention thus makes it possible to optimize the planning of connection resources and processing resources. Such an optimization makes it possible to meet the performance requirements of current and future wireless access networks and the needs of the users of these networks.

Correlatively, the invention relates to a device allowing the planning of resources of a cloud network comprising a wireless access network, the device is capable of detecting a triggering event and comprises:

A module for obtaining at least a first performance indicator for a resource for connection to the wireless access network;

A module for obtaining at least a second performance indicator for a processing resource of the cloud network;

A module for selecting at least one connection resource as a function of at least a first or at least a second performance indicator;

A module for selecting at least one processing resource as a function of the at least one connection resource resulting from the module for selecting at least one connection resource, and at least a first or at least a second performance indicator ; and - a sending module configured to perform at least one sending among:

o sending at least one command to schedule a resource for connection to the wireless access network to a device allowing the planning of a resource for connection; and o sending at least one scheduling command for a processing resource of the cloud network to a device allowing the scheduling of a processing resource

According to the invention, each connection resource can be selected either:

- as a function of at least a first performance indicator of a resource for connection to the wireless access network only; or - as a function of at least a second performance indicator of a processing resource of the cloud network only; or - as a function of at least one first performance indicator and at least one second performance indicator.

Preferably, the selection of at least one connection resource is carried out at least as a function of a first performance indicator.

Preferably, the selection of at least one processing resource is carried out at least as a function of a selected connection resource and of a second performance indicator.

In a particular embodiment of the invention, the resource planning method can be implemented in a cloud network which comprises a 4G and / or subsequent cellular network. Therefore, the invention is part of the technological development of future telecommunications networks.

In another particular embodiment of the invention, the resource planning method can be implemented in a wireless access network which comprises a WiFi access network or a LiFi access network. The invention thus relates to different connection technologies deployed in wireless networks.

In a particular embodiment of the invention, the resource planning method is implemented in a cloud network which comprises a combination of wireless networks 35 of different technologies, generations or versions.

In a particular embodiment of the invention, the unit for processing transmitted or received signals is a baseband unit or an access point.

In a particular embodiment of the invention, the triggering event which triggers the method of the invention relates to a change of state of the cloud network or to an occurrence over time. The invention enables updated resource planning according to the state of the network.

In a particular embodiment of the invention, a connection resource according to the invention is a block of physical resources PRB, a frequency, a time interval or at least one frequency during a time interval.

In a particular embodiment of the invention, a first performance indicator according to the invention relates to the needs of user equipment in resources such as an indicator of type RRI (Resource Requirement Information), or relating to the quality of connection wireless between user equipment and a remote RRH radio head such as a CSI (Channel State Information), CQI (Channel Quality Indicator), SNR (Signal to Noise Ratio), SNIR (Signal to Noise and Interference Ratio) type indicator or SNDR (Signal to Noise plus Distortion Ratio), or relating to traffic circulating in the access network such as a TSI (Traffic State Information) type indicator or relating to service classes such as a QCI type indicator ( QoS Class Indicator). The variety of the nature of the indicator or indicators taken into account by the invention allows better optimization of the entire network.

In a particular embodiment of the invention in which a first performance indicator is of the CSI type, this indicator is accompanied by information relating to the geographic location of at least one user equipment. As a result, the information carried by the CSI type indicator is more precise.

In a particular embodiment of the invention, a processing resource according to the invention is one or more components of a server or of a computer center, which makes it possible to process signals needing large computing capacities. and / or fast calculation times.

In a particular embodiment of the invention, a second performance indicator according to the invention relates to processing resources such as an indicator of RTI (Runtime Task Information) or SSI (Server State Information) type, or relating to links between the processing resources and the remote radio heads RRH such as an indicator of type FOI (Fronthaul Delay Information) or FCSI (Front-haul Capacity State Information). The variety of the nature of the indicators potentially taken into account by the invention allows better optimization of the entire network.

In a particular embodiment of the invention, a selected processing resource allows the execution of at least one operation from coding, decoding, modulation, demodulation, compression, decompression, encryption, decryption , a convergence of a data unit, a mathematical transformation, a scheduling or a nature conversion of a signal. As a result, the invention also makes it possible to virtualize functionalities of the physical layer of the OSI model requiring large processing capacities and having high constraints in terms of reliability and latency.

In a particular embodiment of the invention, the performance indicators are obtained by a measurement, an estimate or a reading.

In a particular embodiment of the invention, a resource planning command, according to the invention, is an allocation, termination, modification or sharing of a processing or connection resource.

In a particular embodiment of the invention, the selection of at least one connection resource is based on scores assigned to potential connection resources. These notes allow, themselves or by establishing a combination between them, to classify the potential connection resources in an order of preference. The potential connection resource with the highest order of preference is selected.

In a particular embodiment of the invention, the selection of at least one processing resource is based on scores assigned to potential processing resources. These notes allow, themselves or by establishing a combination between them, to classify the potential processing resources in an order of preference. The potential processing resource with the highest order of preference is selected.

In a particular embodiment of the invention, the selection of at least one processing resource according to the invention comprises the sub-steps of:

- estimation of a need for processing resources as a function of at least a first or at least a second performance indicator and as a function of the at least one connection resource (R _C0N ) selected in step (E204) selecting at least one connection resource;

- selection of at least one potential processing resource according to the estimate;

- obtaining a quality indicator based on at least one potential processing resource;

- modification of the selection of at least one potential processing resource according to a criterion defined according to the quality indicator;

- repetition of the sub-steps of obtaining a quality indicator and modifying the selection until the criterion is satisfied; and - allocation of the at least one potential processing resource obtained at the end of the repeating sub-step to the at least one processing resource.

Several modes of resource selection are thus possible.

Preferably, the estimation of a need for processing resources is carried out at least as a function of a second performance indicator and of a selected connection resource.

In a particular embodiment of the invention, the selection of at least one connection resource according to the invention is implemented by an iterative method comprising a sulk. The iterative method makes it possible to select, from so-called potential connection resources, at least one resource which meets a need obtained in connection resources.

The device for scheduling resources according to the invention communicates with at least one of two other devices respectively for scheduling connection resources and scheduling processing resources.

The invention also relates to a computer program on a recording medium, this program being capable of being implemented in a device allowing the planning of resources of a wireless access network or more generally in a computer. , this program comprising instructions adapted to the implementation of steps 10 of a resource planning method as described above.

The invention also relates to a computer program on a recording medium, this program being capable of being implemented in a device allowing the planning of resources for connection to a wireless access network.

The invention also relates to a computer program on a recording medium, this program being capable of being implemented in a device allowing the planning of processing resources of a cloud network.

Each of these programs can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in any what other desirable form.

The invention also relates to information or recording media readable by a computer, and comprising instructions for computer programs as mentioned above.

The information or recording media can be any entity or device capable of storing the program. For example, the supports may include a storage means, such as a ROM, for example a CD ROM or a microelectronic circuit ROM, or else a magnetic recording means, for example a floppy disk or a disc. hard.

On the other hand, the information or recording media can be transmissible media such as an electrical or optical signal, which can be routed via an electrical or optical cable, by radio link, by wireless optical link or by other means. The programs according to the invention can in particular be downloaded from a network of the Internet type.

Alternatively, each information or recording medium can be an integrated circuit into which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the method in question.

It can also be envisaged, in other embodiments, that the method or the device for planning resources of a wireless access network included in a cloud network has in combination all or some of the aforementioned characteristics.

Brief description of the drawings

Other characteristics and advantages of the present invention will emerge from the description given below, with reference to the appended drawings which illustrate an embodiment thereof devoid of any limiting character. In the figures:

- Figure 2 is a flowchart representing the main steps of a resource planning method implemented in a cloud network comprising a wireless access network according to an embodiment of the invention;

- Figure 3 shows a functional architecture of devices according to an embodiment of the invention;

- Figure 4 illustrates the hardware architecture of devices according to an embodiment of the invention;

- Figure 5 illustrates the obtaining of performance indicators for connection resources, according to one embodiment of the invention;

- Figure 6 illustrates the obtaining of performance indicators of processing resources, according to one embodiment of the invention;

- Figure 7 illustrates a flowchart representing the main sub-steps of resource selection according to a particular embodiment of the invention.

- Figure 8 illustrates the architecture of a LiFi access network according to one embodiment of the invention; and - Figure 9 illustrates the architecture of a WiFî access network according to an embodiment of the invention.

Different embodiments of the invention are described in this document by way of examples. We then consider a wireless access network included in a cloud network. The wireless access network has a radio-Sch scheduler for connection resources and a cloud-Sch device which allows the planning of processing resources. The first two modes differ in the method of selecting processing resources.

A) Detailed description of several embodiments of the invention

AT.·. D Detailed description of a first embodiment of the invention

FIG. 2 represents the different stages of a resource planning method, according to the present invention, implemented in a cloud network comprising a wireless access network. The cloud network has centralized and shared processing resources in the cloud and / or virtualized functionalities such as the network, the architecture of which has been described in FIG. 1.

The resource planning method according to the invention is implemented by a CoSch device. The cloud network has a cloud-Sch device for planning processing resources and the wireless access network has a radio-Sch device for planning connection resources.

One or more user devices are connected to the wireless access network. A user equipment UE is a communicating object which can be a mobile phone, a tablet, a computer, a connected watch, a connected car or a gateway to an isolated network which can be connected to the wireless network such as a network of objects. connected IoT (Internet of Things), a PMR (Private Mobile Radiocommunications) mobile network, or an industrial network.

The steps of the resource planning method according to the invention take place upon detection of a trigger event Evt. The method of the invention comprises a step E200 of obtaining at least a first performance indicator Indl of a resource for connection to the wireless access network. This first performance indicator Indl can be received from a user equipment UE via a signal S200, or from the device for scheduling radio-Sch connection resources via a signal S202, depending on the nature of the first indicator Indl.

The resource planning method also includes a step E202 of obtaining at least a second performance indicator Ind2 of a processing resource of the cloud network.

In step E204, the resource planning device CoSch according to the invention selects one or more connection resources R _C0N as a function of at least one first performance indicator Indl obtained in step E200 or of at least one second performance indicator Ind2 obtained in step E202.

The CoSch device then selects, in step E206, one or more processing resources R _T rt as a function of the first indicator (s) obtained in step E200 or of the second indicator (s) obtained in step E202 and of the resources ( s) of connection selected in step E204.

In this first embodiment, the selection of at least one connection resource R _C0N in step E204 and the selection of at least one processing resource R _trt in step E206 are both based on notes allocated to potential resources. These notes allow, themselves or by establishing a combination between them, to classify the potential resources in an order of preference. The potential resource with the highest order of preference is selected by the CoSch device.

Once the connection resources R _C0N and processing R _trt are selected, at least one of the two steps E208 or E210 is implemented. In step E208, the device CoSch sends at least one command CMD1 for planning a connection resource to the radio-Sch device for planning resources for connection to the wireless access network. The CoSch device according to the invention sends at step E210 at least one command CMD2 for scheduling a processing resource to the doud-Sch device for scheduling processing resources for the cloud network.

In this particular embodiment, the cloud-Sch device for planning processing resources is identified on the network by an IP address or other address of layer 3 of the OSI model, while the device for planning network connection resources wireless access is identified by a MAC address or other address from layer 2 of the OSI model.

The trigger event Evt can be a change in state of the cloud network originating from at least one user equipment UE such as a request for connection to the access network, increase or decrease or change in the type of data transmitted or received by the UE user equipment, termination of connection, membership or termination of a service, request for change of service class, etc. The trigger event Evt can also be a change of state of the cloud network in terms of modification of the network architecture such as adding, deleting or replacing a connection or processing resource, changing a supplier, change of manufacturer of one or more devices, modification of the connection paths between the different devices of the network, modification of a routing or switching policy, etc. The change in network status can denote a change in one or more performance indicators linked to connection resources or processing resources or to both types of resources.

The trigger event Evt can also be relative to an occurrence over time. In fact, the triggering by Evt of the steps of the method of the invention can be programmed at predefined times, periodic or not.

FIG. 3 presents a functional architecture of a CoSch resource planning device according to the present invention implemented in a cloud network comprising a wireless access network. The device includes means for detecting a triggering event and means for implementing the following modules when a triggering event is detected:

- a module M200 for obtaining at least a first indicator Indl of performance of a resource for connection to the wireless access network, - a module M202 for obtaining at least a second indicator Ind2 for performance of a cloud network processing resource, a module M204 for selecting at least one connection resource as a function of at least a first performance indicator Indl obtained by the module M200 or at least a second performance indicator Ind2 obtained by the module M202, - a module M206 for selecting at least one processing resource as a function of at least a first Indl or at least a second performance indicator Ind2 obtained respectively by the modules M200 and M202, and according to the selection made by the module M204, a module M208 for sending at least one of a command CMD1 for planning a resource for connection to the wireless access network to a radio-Sch device allowing the planning of a connection resource, and a CMD2 command for planning a processing resource to a cloud-Sch device allowing the planning of a processing resource.

The CoSch device has the architecture of a computer, as illustrated in FIG. 4. It includes in particular a processor 7, a random access memory 8, a read-only memory 9, a non-volatile flash memory 10 in a particular embodiment of the invention, as well as communication means 11. Such means are known per se and are not described in more detail here.

The read-only memory 9 of the resource planning device CoSch, according to the present invention constitutes a recording medium in accordance with the invention, readable by the processor 7 and on which is recorded here a Prog-CoSch computer program in accordance with the 'invention. The memory 10 of the CoSch device makes it possible to record variables used for the execution of the steps of the invention, such as the key performance indicators Ind1 and Ind2 or intermediate variables Rprim.

The Prog-CoSch computer program defines functional and software modules here, configured for scheduling connection and processing resources. These functional modules are based on and / or control the hardware elements 7-11 of the CoSch device mentioned above.

FIG. 3 also presents the functional architecture of the radio-Sch device which allows the planning of at least one resource for connection to a network. The radio-Sch device comprises a reception Rx-radio-Sch module capable of receiving and executing at least one command CMD1 for planning a resource for connection to the network.

FIG. 3 also presents the functional architecture of the cloud-Sch device which allows the planning of at least one processing resource. The cloud-Sch device comprises a reception Rx-cloud-Sch module capable of receiving and executing at least one command CMD2 for scheduling a processing resource.

Each of the radio-Sch and cloud-Sch devices has the architecture of a computer, as illustrated in FIG. 4. These radio-Sch and cloud-Sch devices can be dedicated devices or virtual machines hosted on another network device such as a server or a signal or data processing center.

The read-only memory 9 of the radio-Sch device, respectively the read-only memory 9 of the cloud-Sch device, constitutes a recording medium, readable by the processor 7 and on which a computer program Prog-radio-Sch is recorded, respectively Prog-cloud-Sch, according to the invention.

The computer program Prog-radio-Sch, respectively Prog-cloud-Sch, defines functional modules and software configured to implement instructions for the reception and the execution of at least one command CMD1, respectively CMD2, of planning of a connection resource, respectively of processing.

A, 2) Description of a second embodiment of the invention

In the first embodiment described above, a score is assigned for each resource and an order based on the scores is established for the selection of connection and processing resources.

In this second embodiment of the invention, an alternative method is used for step E206 of selecting one or more processing resources R _T rt II is an iterative method comprising a sulk which aims to select, from so-called potential resources, one or more processing resources R _trt to meet an estimated need for resources.

Having obtained at least a first performance indicator Ind1 in step E200 and at least a second indicator Ind2 in step E202, and having selected at least one connection resource R _CCM in step E204, the device CoSch estimates, as a function of the at least one connection resource R _C0N selected and of Indl or Ind2, a need for processing resources. Based on this estimate, the CoSch device establishes a primary selection, in other words a preselection, of one or more potential processing resources Rprim. Then, the CoSch device obtains a quality indicator according to the preselected potential processing resources Rprim. The quality indicator may for example be a response time of a potential processing resource or a performance indicator obtained following the pre-selection of the potential processing resources Rprim.

In this second embodiment, a criterion is necessary to select the processing resource or resources, this criterion being defined as a function of the quality indicator. The CoSch device therefore checks whether the quality indicator obtained as a function of the potential Rprim resources allows or not the satisfaction of the required criterion.

If so, the primary selection of resources is considered final. These are the potential resources Rprim which are allocated to the processing resources selected in step E206. The CoSch device then executes the next step E208 or E210 of the resource planning method.

If the required criterion is not satisfied, the CoSch device modifies the primary selection of potential resources, obtains a new quality indicator corresponding to the modified selection and checks whether or not the new indicator allows the required criterion to be satisfied. . The sub-steps of obtaining the quality indicator and modifying the selection of potential resources are repeated until the criterion is satisfied. Once the sulk ends, the selection of at least one resource is considered final according to this embodiment of the invention,

The loop can have a maximum number of iterations.

The quality indicator can be a combination of several indicators or relate to several parameters.

The required criterion may relate to at least one performance indicator, or to an economic choice such as the cost of using or maintaining at least one resource, or to an ecological choice such as reducing the energy consumption, or a strategic choice such as the promotion of a resource offered by a defined supplier, or others. The required criterion can be a combination of several criteria.

The iterative method of selection (E206) of at least one processing resource, on which this second embodiment of the invention is based, can also be applied for the selection (E204) of at least one connection resource.

A. 3) Other embodiments of the invention

The order of the two steps E200 and E202 is not important. The two stages can be diverted simultaneously or one after the other, whichever precedes the other.

At least one of the two steps E208 and E210 is possible. If the two steps E208 and E210 are executed, their order is not important. The two stages E208 and E210 can take place simultaneously or one after the other, whichever one precedes the other.

A combination of two or more indicators may present another performance indicator.

Obtaining performance indicators Indl and Ind2 is not necessarily the same for all indicators. A combination of the three or two of the three possibilities, namely measurement, estimation and reading, is also possible.

B) Description of the potential applications of the invention

Subsequently, we describe three applications of the invention relating respectively to a cellular access network, a LiFi access network and a WiFi access network, knowing that the invention can also be applied in networks of wireless access using other technologies.

The first two embodiments described above, relating respectively to the selection of resources based on a note, and to the selection of resources based on an iterative method of selection until meeting an estimated need, can all both be applied to cellular access networks, LiFi, WiFi or other wireless access networks. Here we describe their applications in a cellular access network.

B, 1) Application in a cellular access network

B, 1.1) application of the 1 ^st embodiment in a cellular access network

In this example of application of the first embodiment of the invention, the wireless access network is part of a 5G cellular network where processing resources are centralized and shared in the cloud, in other words processing resources can be geographically located outside the coverage area of the wireless access network. We recall that the first embodiment of the invention is based on the assignment of a score to each resource, the classification of the resources according to their scores in a preferential order, and the selection of a resource according to this order.

A processing resource is a calculation memory, a storage memory, a server, a processor, a data center or a signal processing software. The connection resources are denoted RB (Resource Block) and each represent a frequency band available over a time interval. The unit for processing transmitted or received signals: on the wireless access network is a BBU baseband unit. The radio-Sch device for connection resource planning is a virtual machine which resides at the link layer (n ° 2 of the OSI model) of the BBU and which executes a Prog-radio-Sch program. The cloud-Sch processing resource planning device is a virtual machine which executes a Prog-cloud-Sch program and which resides in the application layer of the OSI model or the OS operating system of the processing platforms, these platforms being distributed in the cloud network.

The signal S200 sent from a user equipment UE to the device CoSch and representing at least one indicator Indl of connection resource performance can be information on the state of the channel CSI (Channel state Information) whose channel designates a frequency or a frequency band. The CSI can present the signal strength that the user equipment UE receives from an RRH, the noise power of the environment (Noise Power), the signal to noise ratio SNR (Signal to Noise Ratio), the signal to noise and interference SNIR (Signal to Noise plus Interference Ratio), signal to noise and distortion SNDR (Signal to Noise plus Distortion Ratio), indicator on the quality of the channel CQI (Channel Quality Indicator), indicator on the class of service QCI (QoS Class Indicator), etc. This list of the first key performance indicators for connection resources, given by way of example, is non-limiting.

A first CSI type indicator can be accompanied by information relating to the geographic location of at least one user equipment item UE.

The signal S2O2 sent from the radioSch connection resource planning device to the CoSch device and representing at least one indicator Indl of connection resource performance can be information on the traffic state TSI (Traffic State Information) such as the load (load) of the access network, the load of each connection resource, the class or classes of service supported by each connection resource, etc. The key performance indicator or indicators transmitted by the signal S202 can be information on the resource requirement requirement RRI (Resource Requirement Information) such as the number or the basic bandwidth required for the access network, the rate of interference between signals, etc.

In step E200, by receiving the signals S200 and / or S202, the device CoSch obtains at least one first indicator Indl of performance of a connection resource. Obtaining a first indicator Ind1 can be a measurement carried out by user equipment UE or by the radio-Sch device. The obtaining can also be a measurement carried out by another device other than a UE user equipment or the radio-Sch device then transmitted to the radioSch device. Otherwise, obtaining a first performance indicator Indl can be an estimate from an earlier measurement and / or an earlier estimate. The estimation can be based on mathematical methods or machine learning algorithms. Obtaining it can also be a simple reading.

FIG. 5 presents an example of the progress of step E200 of obtaining at least one indicator Indl of performance of a connection resource relating to the application of the first embodiment of the invention in a wireless network 5G cell. The wireless network has 3 antennas RRH1, RRH2, and RRH3, each covering a cell. UE user equipment is located in the intersection area of the 3 cells. The user equipment UE supplies two indicators RRI _UL and RRI _DL on its resource requirements for UL transmission (up link) and DL reception (down link) of signals. The UE equipment also provides 6 CSI indicators on the quality of the wireless channels, in transmission and in reception, which link this UE user equipment to each of the 3 antennas RRH1, RRH2, and RRH3. By way of example, CSI _1UL represents the CSI type indicator relating to the signal transmission link from the equipment UE to the antenna RRH1. Each of the RRH1, RRH2, and RRH3 provides an indicator on the traffic status of its cell TSI _lf TSI ₂ and TSI ₃ .

In step E202, the CoSch device obtains at least one second performance indicator from a processing resource. The second indicator Ind2 can be information on the execution time of an RTI task by a processing resource (Runtime Task Information), such as the time taken by a data center to perform a functionality of a BBU unit such as a coding or decoding operation which may include a mathematical Fourrier transform operation, or the time taken by a server to recover data from a defined memory register. The second performance indicator (s) can be information on the state of a SSI server (Server State Information) such as its computing capacity, its storage capacity, its load, the nature and the frequency of its processor, the distribution of data in memory box, for example in 32 or 64 bits, etc. The data transmission medium between connection resources and processing resources plays an important role in network performance. The front-haul designates the segment of the network which comprises the intermediate links between the processing resources and the RRH providing the connection resources. As a result, the front-haul presents, in almost all 5G networks, the optical fiber connecting the devices offering connection resources to the devices offering processing resources, however it can have copper or coaxial cable connections. The second performance indicator (s) Ind2 can be information on the Front-haul FDI (Front-haul Delay Information) delay, such as the propagation delay in the fiber or the group speed, or information on the state Front-haul Capacity State Information (FCSI) capacity, such as the number of modes or cores or wavelengths supported by a fiber or the nature and location of amplifiers or connection nodes . This list of second indicators Ind2 of performance of the connection resources, given by way of example, is not limiting.

FIG. 6 presents an example of the progress of step E202 of obtaining at least one indicator Ind2 of performance of a processing resource relating to the application of the first embodiment of the invention in a wireless network 5G cell. The architecture is the same as that illustrated in FIG. 5: a user equipment UE is located in the intersection zone of 3 cells covered by 3 antennas RRH1, RRH2, and RRH3. The network has 4 processing resources placed in the cloud and which are servers A, B, C and D. Each of these 4 servers provides information on its status SSIi, SSI _{2 /} SSI ₃ and SSI ₄ and information on its RTIi, RTI ₂ , RTI ₃ and Rn ₄ task execution times. Each server is connected to one or more RRHs by optical fiber. It provides FDI and FCSI type indicators on these fiber connections. For example, FDI _1A is an indicator on the delay of the link between RRH1 and server A.

Obtaining a second performance indicator for a processing resource can be a measurement or an estimate or a reading, as in the case of obtaining at least one first indicator Ind1.

In step E204, the CoSch device selects at least one connection resource. In this embodiment, the CoSch device assigns a score to each performance indicator of a connection resource. Consider the example illustrated in Figure 5 of obtaining performance indicators for connection resources, the CoSch device assigns a score that varies between 1 and 15 for each indicator obtained. Regarding CSI type indicators, note 15 represents the best radio connection conditions. Regarding TSI type indicators, note 15 represents the highest load. Let us assume for this example that the selection of at least one connection resource is based solely on CSI and TSI, the CoSch device calculates for each of the RRHs an indicator of QI quality as a function of the indicators of type CSI and TSI such as QI = CSI + (15- TSI) where CSI is the average between the CSIs in UL transmission and in DL reception. Table 1 presents as an example the scores assigned for each indicator and the IQ calculated for each RRH. In the example presented in Table 1, the CoSch device selects RRH1 because it provides the highest QI performance indicator.

(CSI _UL + CSI _DL ) / 2 IST Qi RRH1 14 5 24 RRH2 15 10 20

RRH3 3 3 15

Table 1

The selection of at least one connection resource may depend on one or more second indicators Ind2 relating to the performance of the processing resources, in addition or not to one or more first indicators Ind1 relating to the performance of the connection resources.

In step E206, the device CoSch selects at least one processing resource. By way of example, the architecture illustrated in FIG. 6 is considered by taking into account a single second indicator which is the FDI latency. Having selected R.RH1 in the previous step E204, the CoSch device compares the FDIs relating to the links between RRH1 and each of the servers A, B, C and D. Table 2 presents these FDIs. The CoSch device selects server B allowing the lowest latency.

fdi _1a FDI _1B FDI _1C fdi _1d 1.5 ms 1.2 ms No connection No connection

Thereafter at least one of the two steps E208 or E210 is executed. In step E208, the device CoSch sends at least one command CMD1 for planning a connection resource to the radio-Sch device. Then, in step E210, the CoSch device sends at least one command CMD2 for scheduling a processing resource to the cloud-Sch device. In the example taken for this application of the first embodiment of the invention, the CoSch device sends to the radio-Sch device at step E208 a command to allocate a block of RB resources such as a band of RRH1 frequency for UE equipment. The CoSch device sends in step E210 a command to the cloud-Sch device to allocate a processing resource on the server B such as a computing capacity and / or a memory and to allocate it to the signals coming from / intended for the connection resource on RRH1, Generally, each of the CMD1 and CMD2 commands can be an allocation, termination, modification or sharing of a processing or connection resource.

The processing resource or resources planned in step E210 execute functionalities linked to the connection resource (s) planned in step E208. In accordance with this first example of application of the invention, the functionalities of the processing unit BBU relating to the connection of the user equipment UE to RRH1 and which will be executed by the server B can be coding, decoding, modulation, demodulation, mathematical transformation, compression, decompression, encryption or decryption, conversion of the nature of a signal or data, scheduling of connection resources, etc.

B. 1.2) Application of the 2 ^nd embodiment in a cellular access network

FIG. 7 illustrates an example of application of the second embodiment of the invention in a 5 ^th generation 5G cellular access network. We recall that the 2 ^nd embodiment uses an alternative method to the E206 step of selecting at least one processing resource. The method for selecting one or more processing resources includes a loop which aims to select, using indicators, a resource from among potential resources to meet an estimated need for processing resources. Some indicators are part of an IM group of measured or monitored indicators, and some indicators are part of an IE group of estimated indicators.

The resource planning method according to this example application comprises a first stage RRRE of estimating the need for connection resources (Radio Resource Requirement Estimation). The RRRE stage receives a first indicator Indl of type RRI (Resource Requirement Information) and two other first indicators of type CSE (Channel State Estimation) and TSE (Traffic State Estimation). Note that, in this example, the CSE and TSE indicators are obtained by estimation from the measurements of the CSI and TSI indicators. The RRRE step returns as output the selected connection resource (s) R _C on · The selection of at least one connection resource R _œN can be based on the assignment of a score to each potential resource as in the first mode of achievement. However, the method for selecting processing resources according to this second embodiment comprises a second stage CRRE (Cloud Resource Requirement Estimation) which estimates the need for processing resources as a function of the selected connection resource or resources R _C on and d '' at least a first performance indicator Indl or at least a second performance indicator Ind2. In the example presented in FIG. 7, the step CRRE receives as inputs R _CO n, an indicator Ind2 _a for estimation of calculation time of CRE type (CPU Runtime Estimation) obtained from RTI and SSI measurements, and an indicator Ind2 _b for estimating the capacity and the delay of the FCDE fiber (Fronthaul Capacity and Delay Estimation). The CRRE step receives these inputs, estimates the need for processing resources and returns a primary selection of at least one potential processing resource Rprim according to the estimate. A third step of the selection method noted CR.RT (Cloud-Radio access network Response Time) receives as input the Rprim potential resource (s) and an FCDE type indicator and calculates the response time of the potential processing resource (s) Rprim. The next step Test is a step of comparison as a function of the result of step C-RRT and of at least one criterion required by the network. In this example shown in Figure 7, the calculated response time and a required threshold time are compared. According to the result of the comparison, the selection of at least one potential processing resource Rprim can be modified by the step Modif_Rprim. For example, if the calculated response time is less than the threshold time required by an LTE network, processing resources are reduced. The two steps C-RRT for calculating a response time and Modif_Rprim for modifying the selection are repeated until the criterion of the Test step is satisfied. If the criterion of the Test step is respected, the at least one potential processing resource Rprim obtained at the end of the repetition of C-RRT and of Modif-Rprim is allocated to the processing resource (s) R _trt selected . Thereafter, a step TPS-SS (Transmission Point Selection and Server Selection) receives the connection resources R _C on and of processing R _T rt selected and sends at least one command CMD1 for planning a resource for connection to the radio device. -Sch or a CMD2 command for planning a processing resource to the cloud-Sch device.

B. 2) Application of the invention in a LiFi access network

The invention can be applied in a wireless access network based on the use of LiFi (Light Fidelity) wavelength light as illustrated in FIG. 8. The light signal processing unit is an access point PA such as a LiFi transmitter / receiver antenna. A UE user equipment is connected to a LiFi 800 PA by a light channel 802 characterized by a wavelength. User equipment UE can be a telephone 804, a computer 806, a tablet 808, a television control 810, a connected domestic or office appliance 812, or any other communicating equipment which can connect to a LiFi access network. Each user equipment UE or LiFi access point has a transmission module comprising for example a diode or a laser and a reception module comprising for example a photodetector.

In this second application of the invention, a wavelength during a time interval represents a connection resource, Other performance indicators of a connection resource which are added to the non-limiting list given for the first application of the invention relating to cellular networks, are the wavelength, the type and order of modulation, the power of light, the visual field of a LiFi antenna, etc.

B. 3) Application of the invention in a WiFi access network

This third application illustrated in FIG. 9 represents the application of the invention in a Wi-Fi access network (Wireless Fidelity) for the planning of resources according to the invention. The signal processing unit transmitted over a WiFi network is an access point PA.

The WiFi access network may or may not be integrated with a cellular network. If integrated, the signal processing functionality of the PA access point can be planned at a TWAG (Trusted Wireless Access Gateway) access point forming a bridge between the two WIFI and cellular networks.

Another connection resource which is added for this embodiment is a time slot in the case of a single use of TDM time multiplexing.

Claims (15)

1. Resource planning method, implemented in a cloud network comprising a wireless access network, the method comprising, upon detection of a triggering event, the steps of: - Obtaining (E200) at least a first performance indicator (Indl) of a resource for connection to the wireless access network; - obtaining (E202) at least one second performance indicator (Ind2) of a cloud network processing resource; - selection (E204) of at least one connection resource (Rcon) as a function of at least a first (Indl) or at least a second performance indicator (Ind2) obtained previously; - selection (E206) of at least one processing resource (R _T rt) as a function of the at least one connection resource (Rcon) selected in the previous step, and of at least one first (Indl) or at least one second Performance Indicator (Ind2) obtained previously; - and at least one step from: o sending (E208) at least one command (CMD1) for planning a resource for connection to the wireless access network to a device (radio-Sch) allowing the planning of a connection resource; and o sending (E210) at least one command (CMD2) for scheduling a processing resource of the cloud network to a device (cloud-Sch) allowing the scheduling of a processing resource. 2. Resource planning method according to claim 1, in which the cloud network comprises a 4G and / or subsequent generation cellular network or a WiFi network or a LiFi network. 3. Resource planning method according to claim 1, in which the at least one selected processing resource is included in an entity capable of executing functionalities of a baseband unit (BBU). . 4. Resource planning method according to claim 1, in which the triggering event relates to a change of state of the cloud network or to an occurrence over time. 5. Resource planning method according to any one of the claims 1 to 4, in which said selected connection resource (R _C on) is one or more blocks of physical resources PRB, a frequency, a time interval or at least one frequency during a time interval, 6. Resource planning method according to claim 1, in which the at least one first performance indicator is of the RRI, CSI, TSI, SNR, SNIR, SNDR, CQI or QCI type. 7. Resource planning method according to claim 6, in which the at least one first CSI type performance indicator is accompanied by information relating to the geographic location of at least one user equipment (UE). 8. Resource planning method according to claim 1, in which the at least one second performance indicator is of the HR, SSI, FDI or FCSI type. 9. Resource planning method according to claim 1, in which the at least one selected processing resource performs at least one operation among coding, decoding, modulation, demodulation, compression, decompression, encryption, decryption, convergence of a data unit, mathematical transformation, scheduling or nature conversion of a signal. 10. Resource planning method according to claim 1, in which the obtaining of at least one first performance indicator or the obtaining of at least one second performance indicator is a measure, a estimate or reading. 11. Resource planning method according to any one of claims 1 to 10, in which each of said planning commands (CMD1, CMD2) is an allocation, a termination, a modification or a sharing of a processing or connection. 12. Resource planning method according to any one of claims 1 to 11, in which the step (E206) of selecting at least one processing resource (Rtrt) comprises the sub-steps of: - estimation (RRRE) of a processing resource requirement as a function of the at least one first or at least one second performance indicator and as a function of the at least one connection resource (R _CON ) selected in step (E204) of selecting at least one connection resource; - selection (CRRE) of at least one potential processing resource (Rprim) according to said estimate; - obtaining (C-RRT) a quality indicator based on the at least one potential processing resource (Rprim); - modification (ModiLRprim) of the selection of at least one potential processing resource (Rprim) according to a criterion defined according to the quality indicator; - repetition of the sub-steps of obtaining a quality indicator and modifying the selection, until the criterion is satisfied; and - allocation of the at least one potential processing resource (Rprim) obtained at the end of the repeating sub-step, to the at least one processing resource (R _T rt) · 13. Computer program (Prog-CoSch) comprising instructions for the execution of the steps of a resource planning method according to any one of claims 1 to 12, when said program is executed by a computer. 14. Recording medium readable by a computer on which a computer program (Prog-CoSch) is recorded comprising instructions for the execution of the steps of a method of implementing at least one functionality of a signal processing unit according to any one of claims 1 to 13. 15. Device (CoSch) allowing resource planning of a cloud network comprising a wireless access network, said device being able to detect a triggering event and comprising: - A module (M200) for obtaining at least a first indicator (Indl) of performance of a resource for connection to the wireless access network; - a module (M202) for obtaining at least a second indicator (Ind2) of the performance of a resource for processing the cloud network; - a module (M204) for selecting at least one connection resource (Rcon) as a function of at least a first (Indl) or at least a second performance indicator (Ind2); A module (M206) for selecting at least one processing resource (R _trt ) as a function of the at least one connection resource (R _CO n) selected by the module (M204) for selecting at least one connection resource, and at least a first (Indl) or at least a second performance indicator (Ind2); and - a sending module (M208) configured to carry out at least one sending among: o sending at least one command (CMD1) for planning a connection resource to the wireless access network to a device (radio-Sch) allowing the planning of a connection resource; and o sending at least one command (CMD2) for scheduling a processing resource of the cloud network to a device (cloud-Sch) allowing the scheduling of a processing resource.