Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for a scan reduction associated with legacy RATs. A UE may receive, from a database, an indication that a first RAT is unavailable for communications associated with a PLMN. The indication that the first RAT is unavailable may be based on one or more unsuccessful scans for the first RAT. The UE may scan for a second RAT based on a skipped scan for the first RAT. The skipped scan may be based on the indication that the first RAT is unavailable. The UE may communicate with the PLMN based on the scan for the second RAT and the skipped scan for the first RAT.

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for efficiently falling back from one RAT to another RAT while maximizing the services available to a UE. When a request from a UE for communicating with a base station using one RAT is rejected by a network node for unexpected causes, the UE may use the techniques described herein to fallback to an appropriate RAT. For instance, after receiving a response indicating that a request including fifth generation (5G) parameters is rejected, the UE may drop the 5G parameters and fall back to fourth generation (4G), rather than falling back to second generation (2G) or third generation (3G). The unexpected causes may be preconfigured and may be determined based on a number of factors, including a subscription of the UE, a public land mobile network (PLMN) associated with the network node, etc.

Abstract: Disclosed are techniques for handling collisions between multiple radio resource control (RRC) connection establishment procedures for multiple connection events, such as mobile terminating pages and tracking area updates.

Abstract: Disclosed are techniques for handling collisions between multiple radio resource control (RRC) connection establishment procedures for multiple connection events, such as mobile terminating pages and tracking area updates.