Communicating an indicator extending an area scope of system information
View Patent ↗A user equipment (UE) receives an indicator that extends an area scope of system information received by the UE, the system information transmitted by a wireless access network node.
1. A method comprising:
sending, by a wireless access network node to a user equipment (UE), a first information element that identifies neighboring cells, and a second information element that includes an indicator that extends an area scope of system information to an extended area that is larger than a first area corresponding to a first area scope of the system information, the second information element different from the first information element, wherein the indicator includes identification information that identifies the system information shared by multiple cells including the neighboring cells identified by the first information element, the identified system information comprising one or more selected from among a system information block and a scheduling block.
2. The method of claim 1 , wherein the system information is interpretable by the UE as having the first area scope without the indicator, and wherein the extended area includes the multiple cells.
3. The method of claim 2 , wherein the first area corresponding to the first area scope is an individual cell, and the system information is applicable only in the individual cell in an absence of the wireless access network node sending the indicator to the UE, and the system information is applicable in the extended area responsive to the wireless access network node sending the indicator to the UE.
4. The method of claim 1 , wherein the indicator further includes a value tag associated with the system information, the value tag useable to determine whether the system information has been updated.
5. The method of claim 1 , wherein sending the first and second information comprises sending the first and second information elements in a broadcast message.
6. The method of claim 5 , wherein sending the first and second information elements in the broadcast message comprises sending the first and second information elements in a system information block.
7. The method of claim 1 , wherein sending the first and second information elements comprises sending the first and second information elements in a dedicated message.
8. The method of claim 7 , further comprising:
receiving, by the wireless access network node, a capability indication from the UE indicating that the UE supports an ability to reuse common system information of two or more cells.
9. The method of claim 1 , further comprising:
selecting, by the wireless access network node, a broadcast message to send the first and second information for the UE that is one of an idle mode and at least a subset of connected modes.
10. The method of claim 1 , further comprising:
selecting, by the wireless access network node, a dedicated message to send the first and second information elements for a UE that is one of a subset of connected modes.
11. The method of claim 1 , wherein the first and second information elements are included in a message.
12. The method of claim 1 , wherein the identification information in the indicator comprises a list of system information blocks shared by the multiple cells.
13. A user equipment (UE) comprising:
at least one processor configured to:
receive a first information element that identifies neighboring cells, and a second information element including an indicator that extends an area scope of system information received by the UE to an extended area that is larger than a first area corresponding to a first area scope of the system information, the system information transmitted by a first cell, the second information element different from the first information element, wherein the indicator identifies the system information shared by multiple cells including the neighboring cells identified by the first information element, the identified system information comprising one or more selected from among a system information block and a scheduling block.
14. The UE of claim 13 , wherein the UE is to receive the first and second information elements from another UE.
15. The UE of claim 13 , wherein the at least one processor is configured to further:
reselect to a second cell that transmits further system information;
determine, from a value tag specified in the indicator, whether the system information identified by the indicator has been updated in the further system information;
in response to determining that the system information identified by the indicator has not been updated, avoid re-reading the system information identified by the indicator from the further system information; and
in response to determining that the system information identified by the indicator has been updated, re-reading the system information identified by the indicator from the further system information.
16. The UE of claim 13 , wherein the at least one processor is configured to further:
reselect to a second cell that transmits further system information;
identify common system information transmitted by the first and second cells; and
send a further indicator to another UE, the further indicator extending an area scope of the identified common system information.
17. The UE of claim 13 , wherein the at least one processor is configured to further receive the system information from another UE.
18. The UE of claim 13 , wherein the first and second information elements are included in a message.
19. The UE of claim 13 , wherein the indicator comprises a list of different system information blocks shared by the multiple cells, and the at least one processor is configured to:
reuse stored system information blocks identified by the list of different system information blocks, the stored system information blocks stored at the UE.
20. The UE of claim 19 , wherein the at least one processor is configured to:
receive a given system information block not identified by the list of different system information blocks; and
store the given system information block in a storage of the UE in response to determining that the given system information block not being identified by the list of different system information blocks.
21. A method comprising:
sending, by a wireless access network node to a user equipment (UE), an indicator that extends an area scope of system information to an extended area that is larger than a first area corresponding to a first area scope of the system information, wherein the indicator identifies the system information shared by neighboring cells, the identified system information comprising one or more selected from among a system information block and a scheduling block, the system information applicable only in the first area corresponding to the first area scope in an absence of the wireless access network node sending the indicator to the UE, and the system information applicable in the extended area responsive to the wireless access network node sending the indicator to the UE.