Establishing connectivity between a relay node and a configuration entity

1. A method of establishing connectivity between a network node and a configuration entity in a communications network, the method comprising the steps of:

the network node making an initial attachment to the communication network via an initial base station, the attachment occurring in the absence of the network node being configured with an identification of a donor base station which the network node is allowed to access and in advance of seeking to establish a connection with a particular desired donor base station;

establishing a connection between the network node and a user plane of the communications network;

addressing communications to the configuration entity defined as residing in a configuration entity subnet; and

routing the communications from the user plane to the configuration entity subnet in order that the network node becomes configured with at least one identification of a donor base station which the network node is allowed to access by the configuration entity so that the network node is able to establish a connection between the network node and the particular desired donor base station.

2. A method according to claim 1 in which the connection is established to a gateway in the user plane.

3. A method according to claim 1 in which the network node requests that the network node be assigned a network address.

4. A method according to claim 1 in which the network node makes an initial connection to an initial base station.

5. A method according to claim 1 in which a network entity is configured with an access point number defining the configuration entity as a packet data network so that the network node is able to route traffic to the configuration entity.

6. A method according to claim 1 in which an attach procedure used to carry out an authentication step to establish a default bearer.

7. A method according to claim 1 in which a network node indication is sent to a mobility management entity in a connection request to allow the mobility management entity to reject connection requests in respect of mobile terminals that are not authorised to operate as a network node.

8. A method according to claim 1 in which the network node is a relay node.

9. A method according to claim 1 in which once a secure link to the configuration entity has been established, the secure connection can be used for the network node to carry out further steps in a self-configuration procedure.

10. A method according to claim 1 in which a secure tunnel is established which passes through a gateway to extend to the user plane and then returns back to the gateway where the secure connection terminates.

11. A method according to claim 1 involving the stages of preparation, connectivity establishment as a mobile terminal, connectivity establishment as a network node, and establishment of secure connectivity.

12. A method according to claim 1 in which the connectivity is established to enable the network node to be configured by the configuration entity.

13. A communication network comprising:

a network node, a user plane, and a configuration entity, the network node being capable of establishing connectivity with the configuration entity and making an initial attachment to the communication network via an initial base station, the attachment occurring in the absence of the network node being configured with an identification of a donor base station which the network node is allowed to access and in advance of seeking to establish a connection with a particular desired donor base station, the communications network being configured to establish a connection between the network node and the user plane, the network node being capable of addressing communications to the configuration entity defined as residing in a configuration entity subnet, the communications network being configured to route communications from the user plane to the configuration entity subnet in order that the network node becomes configured with at least one identification of a donor base station which the network node is allowed to access by the configuration entity so that the network node is able to establish a connection between the network node and the particular desired donor base station.

14. A network node capable of establishing connectivity with a configuration entity in a communications network, the network node comprising:

a protocol capability configured to establish a connection between the network node and a user plane of the communications network; and

an addressing capability configured to address communications to the configuration entity defined as residing in a configuration entity subnet in order that the communications are routed from the user plane to the configuration entity subnet in order that the relay node becomes configured with an identification of a donor base station which the network node is allowed to access by the configuration entity so that the network node is able to establish a connection between the network node and a particular desired donor base station,

wherein the network node is configured to make an initial attachment to the communication network via an initial base station, the attachment occurring in the absence of the relay node being configured with the identification of the donor base station which the network node is allowed to access and in advance of seeking to establish a connection with the particular donor base station.