Apparatus and method for wireless device connectivity upon radio link failure
View Patent ↗An apparatus and method for improving the connectivity when a radio link failure occurs is disclosed. The method includes detecting, by a user equipment (UE), a radio link failure to a first radio network controller (RNC) and receiving an information message from a second RNC. The method further includes determining whether the first and second RNCs have interface connectivity between them. If the first and second RNCs have interface connectivity between them, performing a connection recovery procedure with the second RNC. However, if the first and second RNCs do not have interface connectivity between them, performing an initial connection procedure to establish a connection with the second RNC without performing a connection recovery procedure.
1. A method, comprising:
detecting, by a user equipment (UE), a radio link failure to a first radio network controller (RNC);
receiving an information message from a second RNC;
determining whether the first and second RNCs have interface connectivity between them;
performing a connection recovery procedure with the second RNC, when the first and second RNCs have interface connectivity between them; and
performing an initial connection procedure to establish a connection with the second RNC without performing a connection recovery procedure beforehand, when the first and second RNCs do not have interface connectivity between them,
wherein the initial connection procedure is performed using the information message.
2. The method of claim 1 , wherein the information message includes information regarding the second RNC and information regarding a cell area associated with the second RNC.
3. The method of claim 2 , further comprising:
determining that the UE is located in the cell area associated with the second RNC.
4. The method of claim 1 , wherein the performing a connection recovery procedure with the second RNC includes sending one or more connection recovery messages to a base station (BS) associated with the second RNC.
5. The method of claim 1 , further comprising:
collecting information regarding the first and second RNCs, including interface connectivity information between the first and second RNCs, before the detecting a radio link failure.
6. The method of claim 1 , wherein the performing an initial connection procedure to establish a connection with the second RNC includes performing location area update (LAU) and routing area update (RAU) for a cell associated with the second RNC.
7. The method of claim 1 , further comprising:
transitioning to an idle state before the performing an initial connection procedure to establish a connection with, the second RNC.
8. An apparatus, comprising:
a radio transceiver configured to receive and transmit signals to a first radio network controller (RNC); and
a processing unit configured to:
detect a radio link failure to the first RNC;
receive an information message from a second RNC;
determine whether the first and second RNCs have interface connectivity between them;
if the first and second RNCs have interface connectivity between them, perform a connection recovery procedure with the second RNC; and
if the first and second RNCs do not have interface connectivity between them, perform an initial connection procedure to establish a connection with the second RNC without performing a connection recovery procedure beforehand,
wherein the initial connection procedure is performed using the information message.
9. The apparatus of claim 8 , wherein the information message includes information regarding the second RNC and information regarding a cell area associated with the second RNC.
10. The apparatus of claim 9 , wherein the processing unit is further configured to determine that the apparatus is located in the cell area associated with the second RNC.
11. The apparatus of claim 8 , wherein the performing a connection recovery procedure with the second RNC includes sending one or more connection recovery messages to a base station (BS) associated with the second RNC.
12. The apparatus of claim 8 , wherein the processing unit is further configured to collect information regarding the first and second RNCs, including interface connectivity information between the first and second RNCs, before the detecting a radio link failure.
13. The apparatus of claim 8 , wherein the performing an initial connection procedure to establish a connection with the second RNC includes performing location area update (LAU) and routing area update (RAU) for a cell associated with the second RNC.
14. The apparatus of claim 8 , wherein the processing unit is further configured to transition the apparatus to an idle state before the performing an initial connection procedure to establish a connection with the second RNC.
15. An article of manufacture including a non-transitory computer-readable storage medium having instructions stored thereon, execution of which by a computing device causes the computing device to perform operations comprising:
detecting a radio link failure to a first radio network controller (RNC);
receiving an information message from a second RNC;
determining whether the first and second RNCs have interface connectivity between them;
performing a connection recovery procedure with the second RNC, when the first and second RNCs have interface connectivity between them; and
performing an initial connection procedure to establish a connection with the second RNC without performing a connection recovery procedure beforehand, when the first and second RNCs do not have interface connectivity between them,
wherein the initial connection procedure is performed using the information message.
16. The article of manufacture of claim 15 , wherein the information message includes information regarding the second RNC and information regarding a cell area associated with the second RNC.
17. The article of manufacture of claim 15 , wherein the performing a connection recovery procedure with the second RNC includes sending one or more connection recovery messages to a base station (BS) associated with the second RNC.
18. The article of manufacture of claim 15 , wherein the operations further comprise:
collecting information regarding the first and second RNCs, including interface connectivity information between the first and second RNCs, before the detecting a radio link failure.
19. The article of manufacture of claim 15 , wherein the performing an initial connection procedure to establish a connection with the second RNC includes performing location area update (LAU) and routing area update (RAU) for a cell associated with the second RNC.
20. The article of manufacture of claim 15 , wherein the operations further comprise:
transitioning to an idle state before the performing an initial connection procedure to establish a connection with the second RNC.