Method and apparatus for improving DRX operation in a wireless communications system
In order to avoid system malfunction, the present invention provides a method for improving Discontinuous Downlink Reception (DRX) operation for a user equipment (UE) in a wireless communications system. The method includes stopping a timer when the UE allocated with a dedicated HS-DSCH Radio Network Temporary Identifier (H-RNTI) moves from a CELL_PCH state to a CELL_FACH state due to an uplink data transmission, wherein the timer is started when the UE enters the CELL_PCH state and is utilized for determining a time length for using a first DRX cycle.
1. A method of improving Discontinuous Downlink Reception (DRX) operation for a user equipment (UE) in a wireless communications system, the method comprising:
being configured with two DRX cycles consisting of a first DRX cycle and a second DRX cycle;
using the first DRX cycle for paging reception and starting a timer when entering a CELL_PCH state, wherein the timer is utilized for determining the time length for using the first DRX cycle;
moving from a CELL_PCH state to a CELL_FACH state due to a uplink data transmission and stopping the timer if the UE is allocated with a dedicated HS-DSCH Radio Network Temporary Identifier (H-RNTI).
2. The method of claim 1 , wherein the first DRX cycle represents a paging listening interval used by the UE.
3. The method of claim 1 , wherein the UE changes to use the second DRX cycle when the timer expires.
4. The method of claim 1 , wherein the UE moves from a CELL_PCH state to a CELL_FACH state due to an uplink data transmission without initiating a cell update procedure.
5. A communications device used in a wireless communications system for improving Discontinuous Downlink Reception (DRX) operation, the communications device comprising:
a control circuit for realizing functions of the communications device;
a central processing unit installed in the control circuit for executing a program code to operate the control circuit; and
a memory coupled to the central processing unit storing the program code;
wherein the program code comprises:
being configured with two DRX cycles consisting of a first DRX cycle and a second DRX cycle;
using the first DRX cycle for paging reception and starting a timer when entering a CELL_PCH state, wherein the timer is utilized for determining the time length for using the first DRX cycle;
moving from a CELL_PCH state to a CELL_EACH state due to a uplink data transmission and stopping the timer if the communications device is allocated with a dedicated HS-DSCH Radio Network Temporary Identifier (H-RNTI).
6. The communications device of claim 5 , wherein the first DRX cycle represents a paging listening interval used by the communications device.
7. The communications device of claim 5 , wherein the communications device changes to use the second DRX cycle when the timer expires.
8. The communication device of claim 5 , wherein the communication device moves from a CELL_PCH state to a CELL_EACH state due to an uplink data transmission without initiating a cell update procedure.