Methods, wireless communications networks and infrastructure equipment

1. A method of controlling communications within a wireless communications network comprising a plurality of infrastructure equipment each being configured to communicate with one or more others of the infrastructure equipment via a backhaul communications link, one or more of the infrastructure equipment each being configured to communicate with one or more communications devices via an access link, the method comprising

receiving, at a first of the infrastructure equipment acting as a donor node connected to a core network part of the wireless communications network, signals representing data from a second of the infrastructure equipment over a first communications path via one or more others of the infrastructure equipment acting as relay nodes,

receiving, at the first infrastructure equipment, assistance information from at least one of the second infrastructure equipment and the one or more other infrastructure equipment acting as the relay nodes,

determining, by one of the first infrastructure equipment and the one or more other infrastructure equipment acting as the relay nodes in the case that the assistance information satisfies a trigger condition, that the second infrastructure equipment should communicate with the first infrastructure equipment over a second communications path via one or more other of the infrastructure equipment acting as relay nodes, the second communications path being different to the first communications path,

transmitting, by the one of the first infrastructure equipment and the one or more other infrastructure equipment acting as the relay nodes which determined that the second infrastructure equipment should communicate with the first infrastructure equipment over the second communications path, a route change command to the second infrastructure equipment indicating that the second infrastructure equipment should communicate with the first infrastructure equipment over the second communications path instead of the first communications path, and

communicating, by the first infrastructure equipment, with the second infrastructure equipment over the second communications path,

wherein the trigger condition comprises a determination, based on the assistance information, that a link quality between two of the infrastructure equipment on the first communications path is below a threshold link quality, at least one quality of service requirement cannot be guaranteed by at least one of the infrastructure equipment on the first communications path, a load at one of the infrastructure equipment on the first communications path is above a threshold load, and at least one route selection criterion has changed.

2. The method according to claim 1 , wherein one or more of the plurality of infrastructure equipment communicate with one or more others of the infrastructure equipment via the backhaul communications link using one or more beams in which power of each of the signals is focused, each of the one or more beams being separately identifiable and forming a directional bias with respect to the one or more of the plurality of infrastructure equipment.

3. The method according to claim 1 , wherein if the first communications path is either of a default communications path or a high priority default communications path, the method comprises receiving, at the first infrastructure equipment, less assistance information from the infrastructure equipment on the first communications path than if the first communications path was not either of a default communications path or a high priority communications path.

4. The method according to claim 1 , comprising transmitting, by the first infrastructure equipment, the route change command to the second infrastructure equipment using an F1 interface.

5. The method according to claim 1 , comprising transmitting, by the first infrastructure equipment subsequent to determining that the second infrastructure equipment should communicate with the first infrastructure equipment over the second communications path, signaling associated with the route change command to each of the infrastructure equipment on the first communications path and to each of the infrastructure equipment on the second communications path.

6. The method according to claim 1 , comprising transmitting, by the one of the one or more other infrastructure equipment acting as the relay nodes, the route change command to the second infrastructure equipment using radio resource control, RRC, signaling.

7. The method according to claim 1 , comprising determining, by any of the infrastructure equipment on the first communications path and the infrastructure equipment on the second communications path, that the second infrastructure equipment should communicate with the first infrastructure equipment over the second communications path.

8. The method according to claim 1 , comprising controlling, by any of the infrastructure equipment on the first communications path and the infrastructure equipment on the second communications path, a user plane function, UPF, to be relocated from one of the infrastructure equipment on the first communications path to one of the infrastructure equipment on the second communications path.

9. The method according to claim 1 , comprising creating, by one of the infrastructure equipment on the second communications path, a new access interface between the one of the infrastructure equipment on the second communications path and the core network part of the wireless communications network.

10. A method of operating a first infrastructure equipment forming part of a wireless communications network comprising a plurality of other infrastructure equipment, the first infrastructure equipment and the plurality of other infrastructure equipment each being configured to communicate with one or more others of the infrastructure equipment via a backhaul communications link, one or more of the infrastructure equipment each being configured to communicate with one or more communications devices via an access link wherein the first infrastructure equipment is configured to act as a donor node connected to a core network part of the wireless communications network, the method comprising

receiving signals representing data from a second of the infrastructure equipment over a first communications path via one or more others of the infrastructure equipment acting as relay nodes,

receiving assistance information from at least one of the second infrastructure equipment and the one or more other infrastructure equipment acting as the relay nodes,

determining, in the case that the assistance information satisfies a trigger condition, that the second infrastructure equipment should communicate with the first infrastructure equipment over a second communications path via one or more other of the infrastructure equipment acting as relay nodes, the second communications path being different to the first communications path,

transmitting a route change command to the second infrastructure equipment indicating that the second infrastructure equipment should communicate with the first infrastructure equipment over the second communications path instead of the first communications path, and

communicating with the second infrastructure equipment over the second communications path,

wherein the trigger condition comprises a determination, based on the assistance information, that a link quality between two of the infrastructure equipment on the first communications path is below a threshold link quality, at least one quality of service requirement cannot be guaranteed by at least one of the infrastructure equipment on the first communications path, a load at one of the infrastructure equipment on the first communications path is above a threshold load, and at least one route selection criterion has changed.

11. A method of operating an infrastructure equipment acting as a relay node forming part of a wireless communications network comprising a plurality of other infrastructure equipment, the infrastructure equipment acting as the relay node and the plurality of other infrastructure equipment each being configured to communicate with one or more others of the infrastructure equipment via a backhaul communications link, one or more of the infrastructure equipment each being configured to communicate with one or more communications devices via an access link, the method comprising

relaying signals representing data from a second of the infrastructure equipment to a first of the infrastructure equipment, the first of the infrastructure equipment acting as a donor node connected to a core network part of the wireless communications network, the signals being relayed over a first communications path via at least the infrastructure equipment acting as the relay node,

receiving assistance information from at least the second infrastructure equipment,

determining, in the case that the assistance information satisfies a trigger condition, that the second infrastructure equipment should communicate with the first infrastructure equipment over a second communications path via one or more other of the infrastructure equipment acting as relay nodes, the second communications path being different to the first communications path, and

transmitting a route change command to the second infrastructure equipment indicating that the second infrastructure equipment should communicate with the first infrastructure equipment over the second communications path instead of the first communications path,

wherein the trigger condition comprises a determination, based on the assistance information, that a link quality between two of the infrastructure equipment on the first communications path is below a threshold link quality, at least one quality of service requirement cannot be guaranteed by at least one of the infrastructure equipment on the first communications path, a load at one of the infrastructure equipment on the first communications path is above a threshold load, and at least one route selection criterion has changed.