Communicating an indicator extending an area scope of system information
In some examples, a first wireless access network entity receives, from a second wireless access network entity, a system information configuration of the second wireless access network entity, and identifies, based on the received system information configuration, common system information between the first and second wireless access network entities. The first wireless access network entity sends, to a user equipment (UE), an indicator extending an area scope of the common system information.
1. A method comprising:
receiving, by a first wireless access network entity from a second wireless access network entity, a system information configuration of the second wireless access network entity;
identifying, by the first wireless access network entity based on the received system information configuration, common system information between the first and second wireless access network entities;
sending, by the first wireless access network entity to a user equipment (UE), an indicator extending an area scope of the common system information to an extended area that is larger than a first area corresponding to a first area scope of the common system information; and
receiving, by the first wireless access network entity, a capability indication from the UE indicating that the UE supports an ability to reuse common system information of two or more cells.
2. The method of claim 1 , wherein the system information configuration describes a configuration of system information of a cell associated with the second wireless access network entity.
3. The method of claim 2 , wherein the system information configuration describes a configuration of system information block types.
4. The method of claim 2 , wherein the system information configuration describes a configuration of a scheduling block.
5. The method of claim 1 , further comprising:
sending, by the first wireless access network entity to the UE, an information element that identifies neighboring cells, wherein the indicator includes identification information that identifies the common system information shared by multiple cells including the neighboring cells identified by the information element.
6. The method of claim 5 , wherein the identification information in the indicator comprises a list of system information blocks shared by the multiple cells.
7. The method of claim 1 , wherein the first area includes a source cell, and the two or more cells comprise neighbor cells of the source cell.
8. The method of claim 1 , wherein the common system information is interpretable by the UE as having the first area scope without the indicator.
9. The method of claim 1 , wherein the indicator further includes a value tag associated with the common system information, the value tag useable to determine whether the common system information has been updated.
10. The method of claim 1 , wherein sending the indicator comprises sending the indicator in a broadcast message.
11. The method of claim 10 , wherein sending the indicator in the broadcast message comprises sending the indicator in a new system information block.
12. The method of claim 10 , wherein sending the indicator in the broadcast message comprises sending the indicator in an information element in a system information block.
13. The method of claim 1 , wherein sending the indicator comprises sending the indicator in a dedicated message.
14. A first wireless access network node comprising:
a processor; and
a non-transitory storage medium storing instructions executable on the processor to:
receive, from a second wireless access network node, a system information configuration of the second wireless access network node;
identify, based on the received system information configuration, common system information between the first and second wireless access network nodes;
send, to a user equipment (UE), an indicator extending an area scope of the common system information to an extended area that is larger than a first area corresponding to a first area scope of the common system information; and
receive a capability indication from the UE indicating that the UE supports an ability to reuse common system information of two or more cells.
15. The first wireless access network node of claim 14 , wherein the instructions are executable on the processor to:
select a broadcast message to send the indicator to the UE that is in one of an idle mode and at least a subset of connected modes, or
select a dedicated message to send the indicator to the UE that is in one of a subset of connected modes.
16. The first wireless access network node of claim 14 , wherein the instructions are executable on the processor to:
send, to the UE, an information element that identifies neighboring cells, wherein the indicator includes identification information that identifies the common system information shared by multiple cells including the neighboring cells identified by the information element.
17. A non-transitory storage medium comprising instructions that upon execution cause a first wireless access network node to:
receive, from a second wireless access network node, a system information configuration of the second wireless access network node;
identify, based on the received system information configuration, common system information between the first and second wireless access network nodes;
send, to a user equipment (UE), an indicator extending an area scope of the common system information to an extended area that is larger than a first area corresponding to a first area scope of the common system information; and
receive a capability indication from the UE indicating that the UE supports an ability to reuse common system information of two or more cells.