Enhanced Mechanism to Access the Network for Mobile Terminal
First Claim
1. A method comprising:
- performing a cell selection/reselection to select a cell to camp on when the UE transits from a Power Saving Mode (PSM) status to an IDLE status by a user equipment (UE) in a mobile communication system;
comparing the cell being camped on and the previous serving cell;
checking the status of a access barring timer; and
establishing a RRC connection based on the status of access barring timer and the result of the comparison.
1 Assignment
0 Petitions
Accused Products
Abstract
In order to optimize UE power consumption, the embodiments of present invention adopt the Power Saving Mode (PSM) solution. In NAS layer, an active timer is defined for PSM. UE starts the active timer when it transits from CONNECTED to IDLE. When the active timer expires, UE transits from IDLE to PSM. UEresumes IDLE before the periodic TAU timer expires. During PSM, the UE may resume IDLE any timer, e.g., for mobile originating communication. A new mechanism to access the network for the UE is proposed in this invention. This mechanism defines the UE behaviors when it transits from PSM to IDLE and to establish RRC connection. First of all, UE performs cell selection/reselection by considering the previous serving cell. Then the access barring timer is controlled by comparing the current and the previous serving cell. The RRC connection is established based on the status of access barring timer.
16 Citations
14 Claims
-
1. A method comprising:
-
performing a cell selection/reselection to select a cell to camp on when the UE transits from a Power Saving Mode (PSM) status to an IDLE status by a user equipment (UE) in a mobile communication system; comparing the cell being camped on and the previous serving cell; checking the status of a access barring timer; and establishing a RRC connection based on the status of access barring timer and the result of the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. An user equipment (UE), comprising:
-
cell selection module, for performing a cell selection/reselection to select a cell to camp on by a UE in a mobile communication system when the UE transits from a Power Saving Mode (PSM) status to an IDLE status and comparing the cell being camped on and the previous serving cell; timer handler for checking the status of a access barring timer; RRC module, for establishing a RRC connection based on the status of access barring timer and the result of the comparison. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification