226.

Channel Condition-Based Public Land Mobile Network (PLMN) Searching

In 5G communication systems, access to a PLMN can be facilitated by terrestrial access nodes, such as macro cells or micro cells, as well as satellite-based access nodes. FIG. 3 is a schematic diagram illustrating an example configuration of a terrestrial access node and a satellite-based access node in accordance with one or more embodiments of the present technology. In terrestrial access technology, the antennas for the cell sites 302 are mounted on ground-based masts, rooftops, and other existing structures, at a height that provides a clear view over the surrounding buildings and terrain. A macro cell is a cell in a mobile phone network that provides radio coverage served by a high-power cell site, while a micro cell is a cell in the mobile phone network that provides a lower-power cell site. In satellite-based access technology, a satellite link 306 is defined as a radio link between a transmitting earth station and a receiving earth station through one satellite. Satellite Internet access, or satellite broadband, is Internet access provided through communication satellites. Modern consumer-grade satellite Internet service is typically provided to individual users through geostationary satellites that can offer relatively high data speeds, with newer satellites able to achieve downstream data speeds up to 506 Mbit/s. In addition, new satellite Internet constellations are being developed in low-earth orbit to enable low-latency Internet access from space.

Satellite-based RANs can provide many benefits including expansive coverage capabilities, faster deployment, and mobile entity connectivity. These networks have the potential to deliver connectivity to remote areas where traditional terrestrial networks may not reach. Satellite RANs can also be deployed faster than terrestrial RANs. They can also provide connectivity for mobile entities like ships or cars. However, while satellite networks can offer certain advantages, terrestrial RANs often provide more optimal solutions for many scenarios. For example, terrestrial RANs still offer lower latency because of the shorter distances the radio signals have to travel. Furthermore, terrestrial networks can support higher data rates. Therefore, terrestrial RANs are often preferred to provide UEs, such as UE 304, with better user experience in the form of lower latency, higher data rates, and increased reliability. Furthermore, when a UE is connected to a terrestrial RAN and searches for other RANs, many of which can be satellite RANs in rural areas, the UE consumes energy, leading to faster battery depletion. Typically, the connection condition is better when connected to a terrestrial RAN as compared to a satellite-based RAN. Therefore, to optimize battery life as well as network quality on the UE, it is desirable to prioritize PLMN searching to a terrestrial RAN, particularly during the interim when satellite access technology is outperformed by terrestrial access technology.

Currently, the 3GPP standard specifies a Multiplier Coefficient for Higher Priority PLMN, EF_MCHPPLMN, that can be configured and used together with the timer interval configured in EF_HPPLMNto adjust the interval of time between two searches for higher priority PLMN via Next Generation RAN (NG-RAN) satellite access. Specifically, EF_HPPLMNspecifies the time interval between two searches, and EF_MCHPPLMNspecifies a multiplier coefficient to be used together with the timer interval configured in EF_HPPLMNto adjust the interval of time between two searches for an alternative PLMN via NG-RAN satellite access. For UEs supporting satellite NG-RAN access as specified in the 3GPP standard, the multiplier coefficient is coded as an unsigned byte, ranging from 1 to a maximum value of 255. If EF_MCHPPLMNis configured, the time interval between two searches for a higher priority PLMN is calculated by multiplying the time interval configured in EF_HPPLMNand the multiplier coefficient configured in EF_MCHPPLMN. However, the existing techniques as defined by the 3GPP standard do not take into account the channel conditions of the current cell and the neighboring cells to dynamically adapt the multiplier coefficient or the time interval. Accordingly, existing systems may allow an interval of time between two PLMN searches at a rate that quickly depletes battery life on the UE or causes a ping-pong type of cell reselection behavior, leading to degraded network performance and user experience.

Techniques are disclosed herein to improve communication efficiency and preserve UEs' battery life by prioritizing certain types of access nodes, e.g., terrestrial RANs as compared to satellite-based RANs. For example, the UE or the network can prioritize a terrestrial RAN over any satellite RANs and only chooses to attach to a satellite RAN as a last resort in the absence of a terrestrial RAN option (e.g., a macro cell). As another example, the UE or the network can update a time interval for searching for an access network based on the channel conditions and/or attributes associated with the access networks.

As one example, methods and systems are described herein for prioritizing terrestrial RANs (e.g., macro cells) over satellite-based RANs by dynamically updating the multiplier coefficient configured in EF_MCHPPLMN. The updating of the multiplier coefficient can be determined based on the comparison between the serving cell performance and the performance of a neighbor cell. By adjusting the multiplier coefficient configured in EF_MCHPPLMN, the time interval between two searches for a higher priority PLMN changes, leading to different time durations for cell reselection searches, which can in turn help conserve UE power and reduce a ping-pong type of reselection behavior.

Dynamically updating the multiplier coefficient configured in EF_MCHPPLMNfaces several technical challenges, such as how to ensure that the serving cell is at least as good as, or better than, the neighboring cell and how to avoid unnecessary searches for a higher priority PLMN via NG-RAN satellite access. To overcome these technical difficulties in updating the multiplier coefficient configured in EF_MCHPPLMN, methods and systems are disclosed herein to perform comparisons between quality metrics of the serving cell and the neighbor cell and to adjust the multiplier coefficient configured in EF_MCHPPLMNto optimize battery life on UEs and reduce ping-pong cell reselection behaviors.

FIG. 4 is a flowchart representation of a process for wireless communication in accordance with one or more embodiments of the present technology. The process 400 includes, at operation 402, performing measurements of a serving cell and neighboring cells. The measurements of a serving cell and one or more neighboring cells are based on a configuration from a base station and can be performed by a wireless mobile device (e.g., UE 304 shown in FIG. 3). The process 400 includes, at operation 404, comparing a first measurement result and a second measurement result. The comparing of the first measurement result and the second measurement result can be performed by the wireless mobile device. Furthermore, the first measurement result can be associated with a first channel condition of the serving cell, such as Received Signal Strength Indicator (RSSI), Received Signal Strength Quality (RSSQ), Reference Signal Received Power (RSRP), or Signal to Interference plus Noise Ratio (SINR). The second measurement result can be associated with a second channel condition of one or more neighboring cells (e.g., RSSI, RSSQ, RSRP, or SINR). The process 400 includes, at operation 406, adjusting an interval of time between two searches for an access network according to the comparison of the first measurement result and the second measurement result. The adjustment of the interval of time between two searches for an access network can be informed by the comparison and stored on the SIM card in a UE.

In some embodiments, the process includes selectively adjusting, by the wireless mobile device, a multiplier coefficient associated with a PLMN search. The multiplier coefficient can be modified by updating a SIM applet on the wireless mobile device. In some embodiments, the SIM applet is stored in memory and runs on a physical SIM card or an embedded SIM card. The multiplier coefficient can be denoted as EF_MCHPPLMN. For example, EF_MCHPPLMNcan be an unsigned byte with a range from 1 to a maximum value of 255. The multiplier coefficient can be used to adjust the time interval for a higher priority PLMN search (e.g., a high value for the multiplier coefficient indicates more time between higher priority PLMN searches). The multiplier can be accessible when at least one of a plurality of services on a SIM card is enabled (e.g., service n^o144, support for Multiplier Coefficient for Higher Priority PLMN search via NG-RAN satellite access) and at least one of the plurality of services on the SIM card can represent one or more alterable variables (e.g., EF_MCHPPLMN). The selectively adjusted multiplier can be used in prioritizing a terrestrial access network or a satellite-based access network based on the measurements of the serving cell and one or more neighboring cells.

In some embodiments, the process includes determining, by the wireless mobile device, a third and fourth measurement result. For example, the first measurement result can be equal to or lower than the second measurement result, which indicates that the second measurement result associated with the second channel condition of one or more neighboring cells will likely provide better network experience than the serving cell. The system can compare a third measurement result associated with the first channel condition of the serving cell and a fourth measurement result associated with the second channel condition of at least one of the one or more neighboring cells. The third measurement result and the fourth measurement result can represent channel conditions distinct from the channel conditions represented by the first measurement result and the second measurement result. For example, the first and second measurement results can be RSSI values, and the third and fourth measurement results can be RSSQ values. By using multiple channel conditions for the measurement, the system can improve the confidence of the present network experience at the UE.

In some embodiments, the process includes comparing, by the wireless device, the first and second measurement results. If the first measurement result is less than the second measurement result, the system can decrease the interval of time between two searches for an access network by selectively adjusting the multiplier coefficient (e.g., EF_MCHPPLMN). Alternatively, if the first measurement result is greater than the second measurement result, the system can increase the interval of time between two searches for an access network.

The system can measure quality metrics from both the service sector and the neighboring sector including quality metrics for LTE and 5G applications. For example, the system can measure RSRP and RSRQ in LTE applications. The system can measure Secondary Synchronization RSRP (SS-RSRP) and Secondary Synchronization RSRQ (SS-RSRQ) in 5G applications. The system can differentiate between the quality metrics for the serving cell and the neighbor cell. Differentiating between the quality metrics is important when determining whether to hop between cells.

In some implementations, the system can use a SIM applet to determine a priority of terrestrial RANs (e.g., macro cells) and satellite RANs. The SIM applet can be implemented to include a computational model to continually monitor quality metrics measured at the UE (e.g., SS-RSRP, SS-RSRQ, and other metrics that can determine channel condition) and to determine when to update the coefficient configured in EF_MCHPPLMN. FIG. 5 is a schematic diagram illustrating an example configuration of a SIM applet implementation in accordance with one or more embodiments of the present technology. FIG. 5 includes cell sites 504, UE 506, and satellite link 508. UE 506 can perform measurements of a serving cell (e.g., cell sites 504) and one or more neighboring cells (e.g., satellite link 508) based on a configuration from a base station. UE 506 can provide measurement results, such as a first measurement result associated with a first channel condition of the serving cell (e.g., cell sites 504) and a second measurement result associated with a second channel condition of the one or more neighboring cells (e.g., satellite link 508). The SIM applet deployed on UE 506 can compare the first measurement result with the second measurement result, and selectively adjust an interval of time between two searches for an access network (e.g., coefficient 502) according to the comparison of the first measurement result and the second measurement result.

For example, after UE 506 compares the measurement result associated with satellite link 508 (e.g., the first measurement result) to the measurement result associated with cell sites 504 (e.g., the second measurement result), UE 506 determines that the channel condition of satellite link 508 is better than cell sites 504. UE 506 can switch to satellite link 508 but decides to reduce the value of coefficient 502, thereby shortening the cell search period so as to increase the chances of quickly finding a terrestrial RAN that has a better channel condition than satellite link 508.

As another example, if the channel condition associated with satellite link 508 is worse than cell sites 504, UE 506 can stay connected to the terrestrial cell and maintain/increase coefficient 502 to limit searching for a higher priority PLMN, subsequently preserving the battery life of UE 506.

Sometimes, however, the SIM applet can be overwhelmed with local requests and transactions. It is thus helpful to offload the processing to a network node (e.g., an applet server). The use of a network node to perform the adjustment of the search durations allows easier updates based on different deployment configurations of the networks.

FIG. 6 is a flowchart representation of another process for wireless communication in accordance with one or more embodiments of the present technology. The process 600 includes, at operation 602, receiving, from a wireless mobile device, measurements of a serving cell and neighboring cells. The measurements of a serving cell and one or more neighboring cells based on a configuration from a base station can be performed by a wireless mobile device (e.g., UE 304 shown in FIG. 3) and transmitted to the network server. The process 600 includes, at operation 604, comparing a first measurement result and a second measurement result. The comparing of the first measurement result and the second measurement result can be performed at the network server. Furthermore, the first measurement result can be associated with a first channel condition of the serving cell (e.g., RSSI, RSSQ, RSRP, or SINR). The second measurement result can be associated with a second channel condition of one or more neighboring cells (e.g., RSSI, RSSQ, RSRP, or SINR). The process 600 includes, at operation 606, transmitting an indication to the wireless mobile device to adjust an interval of time between two searches for an access network. The adjustment of the interval of time between two searches for an access network can be informed by the comparison.

In some embodiments, the applet on the UE takes measurements of the serving cell and the neighbor cell using the SIM applet and the toolkit application programming interface (API). For example, if the measurements (e.g., RSSI or RSSQ) meet the threshold, the SIM applet can treat the measurement as an event and transmit the event to a network server. This allows the SIM applet to identify scenarios in which changing the serving cell is beneficial, and thus the system can preserve battery life and improve network quality on the UE.

In some embodiments, the process includes receiving a notification from the wireless mobile device at the network server. The notification can be generated on the wireless mobile device. In some embodiments, the notification includes both the first measurement result and the second measurement result. The first measurement result and the second measurement result can be used to determine the measurements of the serving cell and the one or more neighboring cells of the wireless mobile device.

In some embodiments, the network server can include a first communication platform that communicates with a second network server. Alternatively, the network server can include two communication platforms. In some embodiments, the first communication platform is a SIM applet platform responsible for computations and comprises a process model (e.g., a state machine). The second communication platform can include a SIM server platform. Both communication platforms can be included on the same network server.

In some embodiments, the first communication platform including the process model generates an update by comparing, upon determining that the first measurement result is equal to or lower than the second measurement result, a third measurement result to a fourth measurement result. Both the third and fourth measurement results can be received from the wireless mobile device. In some embodiments, the third measurement result is associated with the first channel condition of the serving cell and the fourth measurement result is associated with the second channel condition of at least one or more neighboring cells. In some embodiments, the second network server receives the update from the first communication platform of the network server. The wireless mobile device can download the update from the first communication platform of the network server. The update from the first communication platform of the network server can include modifications to optimize the interval of time between two searches for an access network based on the first measurement result being less than the second measurement result. The update comprises a multiplier coefficient associated with a PLMN search. The multiplier coefficient can be denoted as EF_MCHPPLMN.

In some embodiments, the system uses a SIM server platform (e.g., an applet server) to perform the same functions as the SIM applet. The SIM server platform can contain the model that monitors quality metrics and may send updates to a SIM server platform, as deemed necessary by the model. In some embodiments, the SIM server platform is a SIM over-the-air (OTA) server used to push the updates to the UE.

FIG. 7 is a schematic diagram illustrating another example configuration of a server implementation in accordance with one or more embodiments of the present technology. FIG. 7 includes network server 702 to give higher priority to terrestrial RANs (e.g., macro cells) than satellite RANs by transmitting an indication to the wireless mobile device to adjust the multiplier coefficient configured in EF_MCHPPLMN. Network server 702 can be a SIM applet server. Network server 702 can include the SIM applet server as well as SIM OTA server 712, or, alternatively, the servers can be separate. Network server 702 can receive, from a wireless mobile device, quality metrics such as measurements 714 (e.g., SS-RSRP, SS-RSRQ, and other metrics that can determine channel condition) measured at the UE, to determine when to update the coefficient configured in EF_MCHPPLMN(e.g., using update 704). FIG. 7 includes cell sites 706, UE 708, and satellite link 710. UE 708 can transmit measurements of a serving cell (e.g., measurements 714 of cell sites 706) and one or more neighboring cells (e.g., measurements 714 of satellite link 710) based on a configuration from a base station to network server 702.

UE 708 can expose a toolkit API that includes a SIM applet. The SIM applet can establish secure communications to network server 702. The SIM applet can use the toolkit API to periodically retrieve measurements (e.g., measurements 714) related to channel conditions of a serving cell and one or more neighbor cells. Measurements 714 can be transmitted to network server 702 by a SIM applet that requests data via the UE toolkit API.

Network server 702 can compare a first measurement result associated with a first channel condition of the serving cell (e.g., cell sites 706) and a second measurement result associated with a second channel condition of the one or more neighboring cells (e.g., satellite link 710). Network server 702 can compare the measurement results and transmit an indication to UE 708 to adjust an interval of time between two searches for an access network (e.g., update 704) according to the comparison of the first measurement result and the second measurement result.

For example, after network server 702 compares the measurement result associated with satellite link 710 (e.g., the first measurement result) to the measurement result associated with cell sites 706 (e.g., the second measurement result), network server 702 can determine that the channel condition of satellite link 710 is better than cell sites 706, and that UE 708 is connected to cell sites 706. Network server 702 can transmit an indication to UE 708 to switch to satellite link 710 and decrease the coefficient associated with update 704 to increase the chances that UE 708 can find a terrestrial RAN that has a better channel condition than satellite link 710.

Network server 702 can include a SIM server platform that includes processing steps to determine whether the channel condition associated with satellite link 710 is worse than cell sites 706 and whether UE 708 is connected to cell sites 706. Network server 702 can transmit an indication to UE 708 to stay connected to 706 and maintain or reduce the coefficient associated with update 704 to limit searching for a higher priority PLMN, subsequently preserving the battery life of UE 708.

Sometimes, however, the SIM applet can be overwhelmed with requests and transactions from other applets. In this scenario, it is helpful to offload the processing to an applet server. Furthermore, using an applet server can allow for an easier method of updating the multiplier coefficient as updates are coordinated and pushed from the applet server that can be more reliable than the SIM applet.

FIG. 8 is a flowchart illustrating example logic that can be implemented in a SIM applet or a SIM applet server in accordance with one or more embodiments of the present technology. FIG. 8 starts with an event. Events can be triggered upon the network conditions (e.g., of the serving cell and/or one or more neighboring cells) satisfying a criterion in relation to a threshold (e.g., the serving cell becomes better or worse than a threshold). For example, an event can be triggered when the network conditions of a serving cell become better or worse than a first threshold and/or the network conditions of a neighbor cell become better or worse than a second threshold. The criteria can be associated with inter-Radio Access Technology (RAT), Channel State Information Reference Signal (CSI-RS) resources, a channel busy ratio, and/or the aerial height of the mobile device.

At operation 802, the network server (e.g., network server 702 as shown in FIG. 7) obtains and compares quality metrics (e.g., SS-RSRP and SS-RSRQ) for both the serving cell and the neighbor cell. The network server checks, at operation 804, whether a first quality metric for both the serving cell and the neighbor cell are equivalent. For example, the system checks RSRP first and determines that the SS-RSRP for the serving cell is equal to the SS-RSRP for the neighbor cell.

If the SS-RSRP for the serving cell is equal to the neighbor cell, then the process proceeds to operation 808. At operation 808, the network server can check a second quality metric (e.g., RSRQ). For example, the system can check RSRQ second and determine that the SS-RSRQ for the serving cell is less than the SS-RSRQ for the neighbor cell. In the event that the second quality metric for the serving cell is less than the second quality metric for the neighbor cell, the process progresses to operation 810 and transmits an indication to the wireless mobile device to adjust an interval of time between two searches for an access network (e.g., sending an EF_MCHPPLMNupdate).

If the first quality metrics are determined by the network server to be not equal, the process progresses to operation 806. At operation 806, the system checks whether the first quality metric for the serving cell is less than the first quality metric for the neighbor cell. if the first quality metric for the serving cell is not less than the first quality metric for the neighbor cell, the process ends. If the first quality metric for the serving cell is less than the first quality metric for the neighbor cell, the process progresses to operation 810. Finally, at operation 808, If the second quality metric for the serving cell is not less than the second quality metric for the neighbor cell, the process then ends.

Additional embodiments and techniques are as described in the following examples.

1. A method for wireless communication, comprising: performing, by a wireless mobile device, measurements of a serving cell and one or more neighboring cells based on a configuration from a base station; comparing, by the wireless mobile device, a first measurement result associated with a first channel condition of the serving cell and a second measurement result associated with a second channel condition of the one or more neighboring cells; and selectively adjusting an interval of time between two searches for an access network according to the comparing of the first measurement result and the second measurement result.

2. The method of example 1, wherein the selectively adjusting comprises: selectively updating, by the wireless mobile device, a multiplier coefficient associated with a Public Land Mobile Network (PLMN) search.

3. The method of example 2, wherein the multiplier coefficient is denoted as EF_MCHPPLMN.

4. The method of example 2, wherein the multiplier coefficient is accessible when at least one of a plurality of services on a Subscriber Identity Module (SIM) card is enabled, and wherein the at least one of the plurality of services on the SIM card represents one or more variables.

5. The method of example 1, wherein the selectively adjusting comprises: prioritizing a terrestrial access network based on the measurements of the serving cell and the one or more neighboring cells.

6. The method of example 1, further comprising: comparing, upon determining that the first measurement result is equal to or lower than the second measurement result, a third measurement result associated with the first channel condition of the serving cell and a fourth measurement result associated with the second channel condition of at least one of the one or more neighboring cells.

7. The method of example 1, further comprising increasing the interval of time between the two searches for an access network based on the first measurement result being less than the second measurement result.

8. The method of example 1, further comprising increasing the interval of time between the two searches for the access network based on the first measurement result being greater than or equal to the second measurement result.

9. A device for wireless communication, comprising at least one processor and a memory, wherein the at least one processor is configured to: perform measurements of a serving cell and one or more neighboring cells based on a configuration from a base station; compare a first measurement result associated with a first channel condition of the serving cell and a second measurement result associated with a second channel condition of the one or more neighboring cells; and selectively adjust an interval of time between two searches for an access network according to the comparing of the first measurement result and the second measurement result.

10. The device of example 9, wherein the at least one processor is configured to selectively adjust the interval of time based on: selectively updating, by the device for wireless communication, a multiplier coefficient associated with a Public Land Mobile Network (PLMN) search.

11. The device of example 10, wherein the multiplier coefficient is modified by updating a Subscriber Identity Module (SIM) applet on the device for wireless communication, wherein the SIM applet is stored in memory and runs on a physical SIM card or an embedded SIM card.

12. The device of example 9, wherein the at least one processor is configured to selectively adjust the interval of time based on: prioritizing a satellite-based access network or a terrestrial access network based on the measurements of the serving cell and the one or more neighboring cells.

13. A non-transitory, computer-readable storage medium comprising instructions recorded thereon that, when executed by at least one processor of a system of a wireless telecommunications network, cause the system to: perform, by a wireless mobile device, measurements of a serving cell and one or more neighboring cells based on a configuration from a base station; compare, by the wireless mobile device, a first measurement result associated with a first channel condition of the serving cell and a second measurement result associated with a second channel condition of the one or more neighboring cells; and selectively adjust an interval of time between two searches for an access network according to the comparing of the first measurement result and the second measurement result.

14. The non-transitory, computer-readable storage medium of example 13, wherein the at least one processor of the system is configured to selectively adjust the interval of time based on: selectively updating a multiplier coefficient associated with a Public Land Mobile Network (PLMN) search.

15. The non-transitory, computer-readable storage medium of example 14, wherein the multiplier coefficient is denoted as EF_MCHPPLMN.

16. The non-transitory, computer-readable storage medium of example 14, wherein the multiplier coefficient is accessible when at least one of a plurality of services on a Subscriber Identity Module (SIM) card is enabled, and wherein the at least one of the plurality of services on the SIM card represents one or more variables.

17. The non-transitory, computer-readable storage medium of example 13, wherein the at least one processor of the system is configured to selectively adjust the interval of time based on: prioritizing a satellite-based access network or a terrestrial access network based on the measurements of the serving cell and the one or more neighboring cells.

18. The non-transitory, computer-readable storage medium of example 13, further comprising: comparing, upon determining that the first measurement result is equal to or lower than the second measurement result, a third measurement result associated with the first channel condition of the serving cell and a fourth measurement result associated with the second channel condition of at least one of the one or more neighboring cells.

19. The non-transitory, computer-readable storage medium of example 13, further comprising increasing the interval of time between the two searches for the access network based on the first measurement result being less than the second measurement result.

20. The non-transitory, computer-readable storage medium of example 13, further comprising increasing the interval of time between the two searches for the access network based on the first measurement result being greater than or equal to the second measurement result.

21. A method for wireless communication, comprising: receiving, by a network server from a wireless mobile device, measurements of a serving cell and one or more neighboring cells of the wireless mobile device; comparing, by the network server, a first measurement result associated with a first channel condition of the serving cell and a second measurement result associated with a second channel condition of the one or more neighboring cells; and transmitting an indication to the wireless mobile device to adjust an interval of time between two searches for an access network according to the comparing of the first measurement result and the second measurement result.

22. The method of example 21, further comprising: receiving, by the network server, a notification from the wireless mobile device, wherein the notification indicates the first measurement result and the second measurement result.

23. The method of example 21, wherein the network server comprises a Subscriber Identity Module (SIM) applet platform in communication with the wireless mobile device to receive the measurements.

24. The method of example 21, wherein the network server further comprises a SIM server platform configured to manage a SIM of the wireless mobile device.

25. The method of example 24, further comprising: generating an update using a process model implemented on the SIM applet platform; and transmitting the update to the wireless mobile device by the SIM applet platform.

26. The method of example 25, wherein the update includes a modification to decrease the interval of time between the two searches for the access network based on the first measurement result being less than the second measurement result.

27. The method of example 21, further comprising: comparing, upon determining that the first measurement result is equal to or lower than the second measurement result, a third measurement result received from the wireless mobile device and associated with the first channel condition of the serving cell and a fourth measurement result received from the wireless mobile device and associated with the second channel condition of at least one of the one or more neighboring cells.

28. The method of example 21, wherein the interval of time is adjusted based on a multiplier coefficient associated with a Public Land Mobile Network (PLMN) search.

29. The method of example 28, wherein the multiplier coefficient is denoted as EFMCHPPLMN.

30. A device for wireless communication comprising: one or more processors; and a non-transitory, computer-readable storage medium storing instructions that, when executed by the one or more processors, cause the one or more processors to: receive, from a wireless mobile device, measurements of a serving cell and one or more neighboring cells; compare a first measurement result associated with a first channel condition of the serving cell and a second measurement result associated with a second channel condition of the one or more neighboring cells; and transmit an indication to the wireless mobile device to adjust an interval of time between two searches for an access network according to the comparing of the first measurement result and the second measurement result.

31. The device of example 30, further comprising a Subscriber Identity Module (SIM) applet platform in communication with the wireless mobile device to receive the measurements.

32. The device of example 31, wherein the SIM applet platform is configured to generate an update using a process model implemented on the SIM applet platform and transmit the update to the wireless mobile device.

33. The device of example 30, further comprising a SIM server platform configured to manage a SIM of the wireless mobile device.

34. A non-transitory, computer-readable storage medium comprising instructions recorded thereon that, when executed by at least one processor of a system of a wireless telecommunications network, cause the system to: receive, by a network server from a wireless mobile device, measurements of a serving cell and one or more neighboring cells of the wireless mobile device; compare, by the network server, a first measurement result associated with a first channel condition of the serving cell and a second measurement result associated with a second channel condition of the one or more neighboring cells; and transmit an indication to the wireless mobile device to adjust an interval of time between two searches for an access network according to the comparing of the first measurement result and the second measurement result.

35. The non-transitory, computer-readable storage medium of example 34, wherein receiving measurements further comprises: receiving a notification from the wireless mobile device, wherein the notification was generated on the wireless mobile device, and wherein the notification comprises the first measurement result and the second measurement result; and determining the measurements of the serving cell and the one or more neighboring cells of the wireless mobile device using the notification.

36. The non-transitory, computer-readable storage medium of example 34, wherein the network server comprises a first communication platform and a second communication platform, wherein the first communication platform is a Subscriber Identity Module (SIM) applet platform responsible for computations and comprises a process model, and wherein the second communication platform is a SIM server platform.

37. The non-transitory, computer-readable storage medium of example 36, wherein the process model generates an update by comparing, upon determining that the first measurement result is equal to or lower than the second measurement result, a third measurement result received from the wireless mobile device and associated with the first channel condition of the serving cell and a fourth measurement result received from the wireless mobile device and associated with the second channel condition of at least one of the one or more neighboring cells.