Method to Optimize the Memory usage for User Session Information Storage in a 1xEVDO Accessing Network
Original Publication Date: 2009-May-29
Included in the Prior Art Database: 2009-May-29
Venkat Narayanan: INVENTOR [+2]
AbstractMany dual mode ATs (1x and EVDO) are not actively using the 1xEVDO services. However, these ATs request a session in a 1xEVDO RAN and RAN will assign resources to that AT. This article describes a method to optimize the RAN resources for such ATs.
By Venkat Narayanan and Almon Tang
Home and Networks Mobility
Many dual mode ATs (1x and EVDO) are not actively using the 1xEVDO services. However, these ATs request a session in a 1xEVDO RAN and RAN will assign resources to that AT. This article describes a method to optimize the RAN resources for such ATs.
RAN’s resources are limited and when the subscribers are not actively using the 1xEVDO services, the RAN resources are locked down for these subscribers and RAN won’t be able to allocate the necessary resources for subscribers who really need the resources. More and more such sessions in the RAN will impact the session capacity, CPU utilization, and memory utilization.
RAN shall identify the users who do not initiate any activity after HRPD session negotiation over a period and clear the session internally without notifying the AT. However, RAN shall keep the UATI assigned to that AT to avoid the UATI duplication in the RAN. Refer Fig 1.
When the A12 authentication is mandatory, the RAN can identify the users without 1xEVDO subscription. In that case, RAN could reassign UATI from a common pool for such users and discard the session information associated with the UATI from common pool. The common pool could have one or more UATIs that can be shared between two or more users without 1xEVDO subscription. This helps the RAN to provide increased number of sessions serviced. Alternatively, a non subscriber indicator can be created to identify the UATI is being assigned to a non subscriber and can be shared by more than one non subscribers.
When the A12 authentication is not mandatory, upon the RAN, detecting there is no A10 activity (based on the configured time), the RAN can keep the UATI and cle...