METHOD OF PERFORMING CELL RESELECTION IN WIRELESS COMMUNICATION SYSTEM HAVING MULTIPLE TYPES OF NETWORKS
First Claim
1. A method of performing cell reselection in a wireless communication system:
- a user equipment camping on a first cell of a first network using a first radio access technology (RAT);
the user equipment receiving first system information from the first cell and storing first cell information associated with neighboring cells of the first cell in a database; and
the user equipment determining whether an inter-RAT cell reselection should be performed according to both the first system information received from the first cell and data stored in the database when a predetermined condition is satisfied, or only according to the first system information received from the first cell when the predetermined condition is not satisfied.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless communication system includes a user equipment and multiple types of networks. The user equipment stores the cell information of a current cell in a database when the user equipment is camping on the current cell or after the user equipment performs cell reselection to a new cell. The user equipment determines whether inter-RAT cell reselection should be performed according to the system information received from the current cell and the cell information of previous cells stored in its database. Even if the current cell fails to broadcast the accurate and updated information of all neighboring cells, the UE may further check the database periodically or randomly for its previous camping history. Therefore, inter-RAT cell reselection may be properly performed between networks using different RATs in order to reduce call drop rate and improve user experience.
13 Citations
9 Claims
-
1. A method of performing cell reselection in a wireless communication system:
-
a user equipment camping on a first cell of a first network using a first radio access technology (RAT); the user equipment receiving first system information from the first cell and storing first cell information associated with neighboring cells of the first cell in a database; and the user equipment determining whether an inter-RAT cell reselection should be performed according to both the first system information received from the first cell and data stored in the database when a predetermined condition is satisfied, or only according to the first system information received from the first cell when the predetermined condition is not satisfied. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification