Method for selecting time-frequency resources intended to be used by a receiver equipment belonging to a broadcast group for the broadcasting of messages, corresponding devices and computer programs

A reception method of receiving at least one broadcast second message comprising a payload in a broadcasting group comprising a plurality of receiver equipments and an emitter equipment, the reception method being implemented by one receiver equipment and comprising:

• receiving a first message emitted by a base station of a radio communication network to which all of the equipments belonging to the broadcasting group are attached, comprising parameters identifying time-frequency resources of a pool of time-frequency resources that can be used during the broadcasting of the second message;
• receiving, both in a first time-frequency resource used and in a second time-frequency resource used, the second message broadcast during a broadcasting,
• the second time-frequency resource being distinct in time from the first time-frequency resource used;
• receiving the second message broadcast by using the second time-frequency resource being independent from any acknowledge receipt of the reception of the second message by using the first time-frequency resource,
• the second message comprising the payload and control data,
• wherein the control data in each one of the broadcasting of the second message comprises information enabling to identify, independently from the information comprised in the control data of the other one broadcasting, both the first time-frequency resource selected and the at least one second time-frequency resource selected;
• and
• processing the control data comprised in the broadcast second message both received in the first time-frequency resource and in the second time-frequency resource, by combining the useful data contained in the second message broadcast by using the first time-frequency resource and the useful data contained in the second message broadcast by using the second time-frequency resource and by decoding the useful data thus combined.

A method of emitting at least a first message in a broadcasting group comprising a plurality of receiver equipments and an emitter equipment, the emission method being implemented by a base station of a radio communication network to which all of the equipments belonging to the broadcasting group are attached and comprising:

• dividing a pool of time-frequency resources into a plurality of time-frequency resources for the broadcasting, by the emitter equipment, of at least a second message in the broadcasting group, the broadcasting using two distinct time frequency resources among the plurality of time-frequency resources, the broadcasting being performed using the two distinct time-frequency resources independently from any acknowledge receipt of reception of the second message by using one of the two distinct time-frequency resources, the two distinct time-frequency resource being different in time, and both the second message broadcast by using the two distinct time-frequency resources comprising a same payload and control data,
• wherein the control data in each one of the broadcasting of the second message comprises information enabling to identify, independently from the information comprised in the control data of the other one broadcasting, both two distinct time-frequency resources;
• and
• emitting the first message comprising parameters identifying the time-frequency resources in the broadcasting group.

An emitter equipment capable of broadcasting at least one second message comprising a payload to a plurality of receiver equipments belonging to a broadcasting group, the emitter equipment comprising at least one processor configured for:

• receive a first message emitted by a base station of a radio communication network to which all of the equipments belonging to the broadcasting pool are attached, comprising parameters identifying time-frequency resources of a pool of time-frequency resources for broadcasting the second message;
• select, in the pool of time-frequency resources, both a first time-frequency resource and
• at least one second time-frequency resource, the at least one second time-frequency resource being in a subset of the time-frequency resources of the pool of time-frequency resources, different in time from the first time-frequency resource;
• subsequently to selecting both the first time-frequency resource and the at least one second time-frequency resource, broadcast the second message by using both the first time-frequency resource selected and
• the at least one second time-frequency resource selected, the broadcasting of the second message by using the at least one second time-frequency resource being independent from any acknowledge receipt, from the receiver equipments, of the broadcasting of the second message by using the first time-frequency resource,
• each one of the broadcasting of the second message by using the first time-frequency resource selected and the broadcasting of the second message by using the at least one second time-frequency resource selected comprising
• the payload and control data,
• wherein the control data in each one of the broadcasting of the second message comprises information enabling to identify, independently from the information comprised in the control data of the other one broadcasting, both the first time-frequency resource selected and the at least one second time-frequency resource selected.

A receiver equipment receiving at least one broadcast second message comprising a payload in a broadcasting group comprising a plurality of receiver equipments and an emitter equipment, the receiver equipment comprising at least one processor configured for:

• receive a first message emitted by a base station of a radio communication network to which all of the equipments belonging to the broadcasting group are attached, comprising parameters identifying time-frequency resources of a pool of time-frequency resources that can be used during the broadcasting of the second message;
• receive, both in a first time-frequency resource used and in a second time-frequency resource used, the second message broadcast during a broadcasting,
• the second time-frequency resource used being distinct in time from the first time-frequency resource used;
• receiving the second message broadcast by using the second time-frequency resource being independent from any acknowledge receipt of the reception of the second message by using the first time-frequency resource,
• the second message comprising the payload and control data,
• wherein the control data in each one of the broadcasting of the second message comprises information enabling to identify, independently from the information comprised in the control data of the other one broadcasting, both the first time-frequency resource selected and the at least one second time-frequency resource selected;
• and
• process the control data comprised in the broadcast second message both received in the first time-frequency resource and in the second time-frequency resource, by combining the useful data contained in the second message broadcast by using the first time-frequency resource and the useful data contained in the second message broadcast by using the second time-frequency resource and by decoding the useful data thus combined.

A base station of a radio communication network to which a set of receiver equipments and an emitter equipment belonging to a broadcasting group are attached, the base station being capable of emitting at least a first message in the broadcasting group and comprising at least one processor configured for:

• dividing a pool of time-frequency resources into a plurality of time-frequency resources for the broadcasting, by the emitter equipment, of at least a second message in the broadcasting group, the broadcasting using two distinct time frequency resources among the plurality of time-frequency resources, the broadcasting being performed using the two distinct time-frequency resources independently from any acknowledge receipt of reception of the second message by using one of the two distinct time-frequency resources, the two distinct time-frequency resource being different in time, both the second message broadcast by using the two distinct time-frequency resources comprising a same payload and control data,
• wherein the control data in each one of the broadcasting of the second message comprises information enabling to identify, independently from the information comprised in the control data of the other one broadcasting, both two distinct time-frequency resources;
• and
• emitting the first message comprising parameters identifying the time-frequency resources in the broadcasting group.