System performance

1. A method comprising:

deciding at a first access node that a change in configuration for at least one set of radio resources allocated to said first access node among a plurality of configurations is required based on a determination of the relative need for each of the plurality of configurations by the first access node;

sending from the first access node to one or more other access nodes neighbouring said first access node a communication about the change in configuration for at least one set of radio resources among the plurality of configurations,

wherein the plurality of configurations includes a first configuration accessible to a first category of communication devices, but not to a second category of communication devices, and a second configuration accessible to both said first category and said second category of communication devices.

2. The method according to claim 1 , wherein said communication comprises information about the decision at said first access node to make the change in configuration for said at least one set of radio resources.

3. The method according to claim 2 , wherein said communication comprises information about the timing of the change in configuration for said at least one set of radio resources.

4. The method according to claim 1 , wherein said communication comprises a single message including information about the configuration for a plurality of sets of radio resources.

5. The method according to claim 1 , wherein said communication comprises a request to said one or more neighbouring access nodes to change the configuration of one or more sets of radio resources to said second configuration.

6. The method according to claim 5 further comprising:

making said request in response to an identification at said first access node of said neighbouring access node as a potential target access node for the handover from said first access node to said neighbouring access node of a communication device belonging to said second category of communication devices.

7. The method according to claim 1 , wherein said second configuration comprises allocating part of said set of radio resources to the transmission of reference signals required by said second category of communication devices to access control signalling or data carried on said set of radio resources.

8. The method according to claim 1 , wherein said second configuration comprises allocating part of said set of radio resources to the transmission of control signalling required by said second category of communication devices to access user data carried on said set of radio resources.

9. An apparatus comprising:

a processor; and

a memory including computer program code, wherein the memory and computer program code are configured, with the processor, to cause the apparatus to:

decide at the apparatus that a change in configuration for at least one set of radio resources allocated to the apparatus among a plurality of configurations is required based on a determination of the relative need for each of the plurality of configurations by the apparatus;

send from the apparatus to one or more other access nodes neighbouring said apparatus a communication about the change in configuration for at least one set of radio resources among the plurality of configurations,

wherein the plurality of configurations includes a first configuration accessible to a first category of communication devices, but not to a second category of communication devices, and a second configuration accessible to both said first category and said second category of communication devices.

10. The apparatus according to claim 9 , wherein said communication comprises information about the decision at said apparatus to make the change in configuration for said at least one set of radio resources.

11. The apparatus according to claim 10 , wherein said communication comprises information about the timing of the change in configuration for said at least one set of radio resources.

12. The apparatus according to claim 9 , wherein said communication comprises a single message including information about the configuration for a plurality of sets of radio resources.

13. The apparatus according to claim 9 , wherein said communication comprises a request to said one or more neighbouring access nodes to change the configuration of one or more sets of radio resources to said second configuration.

14. The apparatus according to claim 13 , wherein the memory and computer program code are further configured, with the processor, to cause the apparatus to:

make said request in response to an identification at said first access node of said neighbouring access node as a potential target access node for the handover from said first access node to said neighbouring access node of a communication device belonging to said second category of communication devices.

15. The apparatus according to claim 9 , wherein said second configuration comprises allocating part of said set of radio resources to the transmission of reference signals required by said second category of communication devices to access control signalling or data carried on said set of radio resources.

16. The apparatus according to claim 9 , wherein said second configuration comprises allocating part of said set of radio resources to the transmission of control signalling required by said second category of communication devices to access user data carried on said set of radio resources.

17. A computer program product comprising a non-transitory computer-readable storage medium bearing computer program code embodied therein for use with a computer, the computer program code comprising code for performing:

decide at a first access node that a change in configuration for at least one set of radio resources allocated to said first access node among a plurality of configurations is required based on a determination of the relative need for each of the plurality of configurations by the first access node;

send from the first access node to one or more other access nodes neighbouring said first access node a communication about the change in configuration for at least one set of radio resources among the plurality of configurations,

wherein the plurality of configurations includes a first configuration accessible to a first category of communication devices, but not to a second category of communication devices, and a second configuration accessible to both said first category and said second category of communication devices.