Mobile radio communications device, related network device and method

1. A mobile radio communications device arranged for operation within a mobile radio communication network comprising a plurality of location areas each comprising a plurality of cells, the device including:

a unit that identifies an approaching border region of an area with a neighboring area;

a triggering unit that triggers location update signaling from the device to reflect a change in area responsive to the identification of the border; and

a delaying unit that delays transmission of the location update signaling,

wherein said delaying unit includes a random delay unit that determines autonomously a random delay as a delay of said delaying unit in said transmission of the location update signaling, and

wherein, in the location update signaling, the mobile radio communication network provides information that allows the mobile radio communications device to identify cells that belong to the border by at least one of a cell identity for border cells, a bit mask to identify the border cells from the cell identity, a cell identity of a center cell, and a distance of the border cells to the center cell.

2. A device as claimed in claim 1 , wherein the triggering of the location update signaling occurs before the device crosses the border into the neighboring area.

3. A device as claimed in claim 1 , wherein the unit that delays the transmission of the location update signaling delays the triggering.

4. A device as claimed in claim 1 , wherein a range in potential random delay is restrictable by a predetermined maximum delay value.

5. A device as claimed in claim 4 , wherein the random delay unit receives a maximum random time value or a parameter for determination of the maximum delay value.

6. A device as claimed in claim 5 , wherein the random delay unit receives the maximum random time by way of broadcast information from cells in one of the location areas.

7. A method of controlling operation of a mobile radio communications device within a mobile radio communication network comprising a plurality of location areas each comprising a plurality of cells, said method including:

identifying an approaching border of an area with a neighboring area;

triggering location update signaling from the device to reflect a change in area and responsive to the identification of the approaching border; and

delaying transmission of the location update signaling,

wherein said mobile radio communications device determines autonomously a random delay as a delay of said transmission of the location update signaling, and

wherein, in the location update signaling, the mobile radio communication network provides information that allows the mobile radio communications device to identify cells that belong to the border by at least one of a cell identity for border cells, a bit mask to identify the border cells from the cell identity, a cell identity of a center cell, and a distance of the border cells to the center cell.

8. A method as claimed in claim 7 , wherein the triggering of the location update signaling occurs before the device crosses the border region into the neighboring area.

9. A method as claimed in claim 7 , wherein the transmission of the location update signaling is delayed by a delay in the triggering.

10. A method as claimed in claim 7 , further comprising defining and employing a predetermined maximum delay value.

11. A method as claimed in claim 10 , wherein the maximum random delay value is determined in accordance with a standard serving to specify a network technology.

12. A method as claimed in claim 11 , wherein the maximum random delay value comprises a fixed value for all mobile radio communications devices in the network.

13. A maximum as claimed in claim 11 , wherein the maximum random delay value is depending on a mobility of the mobile radio communications device, and

wherein a rate of cell reselection to the area change is employed to include the mobility.

14. A method as claimed in claim 11 , wherein the maximum random delay value is not fixed, and

wherein the maximum random delay value or a parameter for the determination of the value is given to the mobile radio communications device.

15. A method as claimed in claim 14 , wherein the value or parameter is included in broadcast information cells in one of the location areas.

16. A method as claimed in claim 7 , wherein a determination of a proximity to a border region is made at the location update signaling.

17. A method as claimed in claim 16 , wherein the network indicates a subset location area which is in a border region.

18. A mobile radio communications network device including a unit that indicates to a mobile radio communications device as claimed in claim 1 , that it has entered a border region of an area where it is known to be located by the network.

19. A network device as claimed in claim 18 , wherein the indication is provided at a time of location update.

20. A network device as claimed in claim 19 , further comprising indicating a subset of location areas in a border region, if the network indicates multiple location areas to the mobile radio communications device.

21. A network device as claimed in claim 1 , wherein the information comprises at least one the of the cell identity of the border cells and the bit mask to identify the border cells from the cell identity.

22. A mobile radio communications device arranged for operation within a mobile radio communication network comprising a plurality of location areas each comprising a plurality of cells, the device including:

means for identifying an approaching border region of an area with a neighboring area;

triggering means for triggering location update signaling from the device to reflect a change in area responsive to the identification of the border; and

delaying means for delaying transmission of the location update signaling,

wherein said delaying means includes random delay means for determining autonomously a random delay as a delay of said delaying means in said transmission of the location update signaling, and

wherein, in the location update signaling, the mobile radio communication network provides information that allows the mobile radio communications device to identify cells that belong to the border by at least one of a cell identity for border cells, a bit mask to identify the border cells from the cell identity, a cell identity of a center cell, and a distance of the border cells to the center cell.

23. A mobile radio communications device arranged for operation within a mobile radio communication network comprising a plurality of location areas each comprising a plurality of cells, the device including:

a unit that identifies an approaching border region of an area with a neighboring area;

a triggering unit that triggers location update signaling from the device to reflect a change in area responsive to the identification of the border; and

a delaying unit that delays transmission of the location update signaling,

wherein said delaying unit includes a random delay unit that determines autonomously a random delay as a delay of said delaying unit in said transmission of the location update signaling, and

wherein, in the location update signaling, the mobile radio communication network provides information that allows the mobile radio communications device to identify cells that belong to the border by any combination of a cell identity for border cells, a bit mask to identify the border cells from the cell identity, a cell identity of a center cell, and a distance of the border cells to the center cell.