Congestion control on a cellular frequency providing broadcast services

1. A method comprising:

removing an entry of a first system information block from a list included in a second system information block to be broadcasted, said first system information block comprising information related to multimedia broadcast and multicast services, said list comprising information related to broadcasted system information elements;

prohibiting modification of an information tag included in said second system information block to be broadcasted, said information tag being indicative of a change of system information comprising at least said list; and

prohibiting inclusion of a modification indicator in any paging messages that may be transmitted, said modification indicator being indicative of said change of said system information.

2. The method according to claim 1 , further comprising:

stopping broadcast of said first system information block.

3. The method according to claim 1 , further comprising:

continuing broadcast of said first system information block.

4. The method according to claim 1 , further comprising:

removing an entry of a third system information block from said list, said third system information block comprising service area identity information;

stopping broadcast of said third system information block;

modifying said information tag; and

including said modification indicator into said paging messages to be transmitted wherein said removing said entry of said third system information block, said stopping broadcast of said third system information block, said modifying said information tag and said including said modification indicator are performed prior to said removing said entry of said first system information block.

5. The method according to claim 4 , further comprising:

at least one of:

broadcasting said second system information block comprising said list and said information tag prior to said removing said entry of said first system information block, and

transmitting said paging messages prior to said removing said entry of said first system information block.

6. The method according to claim 1 , wherein at least one of:

the method is operable at or by a base station or access node of a cellular system,

the method is operable in at least one of a LTE and a LTE-A cellular system,

said first system information block is a SIB Type 13,

said second system information block is a SIB Type 1,

said list is a schedulingInfoList,

said information tag is a systemInfoValueTag, and

said modification indicator is a systemInfoModification.

7. A method comprising:

prioritizing, in cell reselection, a carrier frequency providing multimedia broadcast and multicast service;

receiving a first system information block comprising at least a list and an information tag, said list comprising information related to broadcasted system information elements;

observing a disappearance of an entry of a second system information block from said list, said second system information block comprising information related to multimedia broadcast and multicast services;

observing a modification state of said information tag; and

continuing said prioritizing, if said information tag is unmodified.

8. The method according to claim 7 , further comprising:

receiving a paging message; and

continuing said prioritizing, if said paging message does not contain a predetermined modification indicator.

9. The method according to claim 7 , wherein at least one of:

the method is operable at or by a terminal, user equipment, mobile station or modem,

the method is operable in at least one of a LTE and a LTE-A cellular system,

said first system information block is a SIB Type 1,

said list is a schedulingInfoList,

said information tag is a systemInfoValueTag,

said second system information block is a SIB Type 13, and

said modification indicator is a systemInfoModification.

10. An apparatus comprising:

at least one processor; and

at least one memory including computer program code, where the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to at least:

remove an entry of a first system information block from a list included in a second system information block to be broadcasted, said first system information block comprising information related to multimedia broadcast and multicast services, said list comprising information related to broadcasted system information elements;

prohibit modification of an information tag included in said second system information block to be broadcasted, said information tag being indicative of a change of system information comprising at least said list; and

prohibit inclusion of a modification indicator in any paging messages that may be transmitted, said modification indicator being indicative of said change of said system information.

11. The apparatus according to claim 10 ,

wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to stop broadcast of said first system information block.

12. The apparatus according to claim 10 ,

wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to continue broadcast of said first system information block.

13. The apparatus according to claim 10 , wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to:

remove an entry of a third system information block from said list, said third system information block comprising service area identity information;

stop broadcast of said third system information block;

modify said information tag; and

include said modification indicator into said paging messages to be transmitted, wherein said removing said entry of said third system information block, said stopping broadcast of said third system information block, said modifying said information tag and said including said modification indicator are performed prior to said removing said entry of said first system information block.

14. The apparatus according to claim 13 , wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to at least one of:

broadcast said second system information block comprising said list and said information tag prior to said removing said entry of said first system information block; and

transmit said paging messages prior to said removing said entry of said first system information block.

15. The apparatus according to claim 10 , wherein at least one of:

the apparatus is operable as or at a base station or access node of a cellular system,

the apparatus is operable in at least one of a LTE and a LTE-A cellular system,

said first system information block is a SIB Type 13,

said second system information block is a SIB Type 1,

said list is a schedulingInfoList,

said information tag is a systemInfoValueTag, and

said modification indicator is a systemInfoModification.

16. An apparatus comprising:

at least one processor; and

at least one memory including computer program code, where the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to at least:

prioritize, in cell reselection, a carrier frequency providing multimedia broadcast and multicast service;

receive a first system information block comprising at least a list and an information tag, said list comprising information related to broadcasted system information elements;

observe a disappearance of an entry of a second system information block from said list, said second system information block comprising information related to multimedia broadcast and multicast services; and

observe a modification state of said information tag; wherein

said apparatus is further configured to continue said prioritizing, if said information tag is unmodified.

17. The apparatus according to claim 16 , wherein

the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to:

receive a paging message; and

continue said prioritizing, if said paging message does not contain a predetermined modification indicator.

18. The apparatus according to claim 16 , wherein at least one of:

the apparatus is operable as or at a terminal, user equipment, mobile station or modem,

the apparatus is operable in at least one of a LTE and a LTE-A cellular system,

said first system information block is a SIB Type 1,

said list is a schedulingInfoList,

said information tag is a systemInfoValueTag,

said second system information block is a SIB Type 13, and

said modification indicator is a systemInfoModification.

19. A non-transitory memory storing a computer program product comprising computer-executable computer program code which is executed by a processor, to cause the computer to carry out the method according to claim 1 .

20. The computer program product according to claim 19 , wherein the computer program code is directly loadable into an internal memory of the processor.