METHOD AND APPARATUS FOR PERFORMING DISCONTINUOUS RECEPTION OPERATION BY CONNECTED MODE USER EQUIPMENT IN A MOBILE COMMUNICATION SYSTEM

• US 20130142178A1
• Filed: 01/11/2013
• Published: 06/06/2013
• Est. Priority Date: 09/19/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Soeng-Hun, LEE, Ju-Ho, VAN DER VELDE, Himke, VAN LlESHOUT, Gert Jan, JEONG, Kyeong-In
• Granted Patent: US 8,831,045 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0222 in packet switched networks
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 56/0005 synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for performing a Discontinuous Reception (DRX) operation by a connected mode User Equipment (UE) in a mobile communication system. The method includes waking up at a wake-up timing, and determining whether an incoming data indication is received from a Node B; reestablishing uplink synchronization upon receipt of the incoming data indication; and waking up after sleeping for a time from the incoming data indication reception timing, receiving a transmission resource allocation message from the Node B, and receiving downlink data over allocated transmission resources.

Claims

1. A method for establishing Time Alignment by a User Equipment (UE) in a mobile communication system, the method comprising:

receiving, from a Node B, information for identifying a dedicated preamble on a downlink control channel;

transmitting the dedicated preamble based on the information to the Node B;

receiving from the Node B a response message to the transmitted dedicated preamble on a downlink shared channel, wherein the response message includes a timing adjustment information and information for a Channel Quality Indicator (CQI) report;

establishing Time Alignment based on the timing adjustment information included in the response message; and

transmitting the CQI report based on the information for CQI report to the Node B.

2. The method of claim 1, wherein the information for CQI report comprises information on resource assignment for the CQI report.

3. The method of claim 1, further comprising:

receiving downlink data from the Node B after establishing Time Alignment.

4. The method of claim 1, wherein the response message further comprises an uplink grant.

5. An apparatus for establishing Time Alignment by a User Equipment (UE) in a mobile communication system, the apparatus comprising:

a transceiver for receiving, from a Node B, information for identifying a dedicated preamble on a downlink control channel, transmitting the dedicated preamble based on the information to the Node B, receiving from the Node B a response message corresponding to the transmitted dedicated preamble on a downlink shared channel and transmitting a Channel Quality Indicator (CQI) report to the Node B, wherein the response message includes a timing adjustment information and information for the CQI report; and

a controller operable to establish Time Alignment based on the timing adjustment information included in the response message and to transmit the CQI report based on the information for the CQI report.

6. The apparatus of claim 5, wherein the information for the CQI report comprises information on resource assignment for the CQI report.

7. The apparatus of claim 5, wherein the transceiver receives downlink data from the Node B after establishing Time Alignment.

8. The apparatus of claim 5, wherein the response message further comprises an uplink grant.

9. A method for establishing Time Alignment by a Node B in a mobile communication system, the method comprising:

transmitting information for identifying a dedicated preamble on a downlink control channel to a User Equipment (UE);

receiving from the UE the dedicated preamble based on the information;

transmitting a response message corresponding to the transmitted dedicated preamble on a downlink shared channel to the UE, wherein the response message includes timing adjustment information for establishing Time Alignment and information for a Channel Quality Indicator (CQI) report; and

receiving the CQI report based on the information for CQI report.

10. The method of claim 9, wherein the information for CQI report comprises information on resource assignment for the CQI report.

11. The method of claim 9, further comprising:

transmitting downlink data to the UE after establishing Time Alignment.

12. The method of claim 9, wherein the response message further comprises an uplink grant.

13. An apparatus for establishing Time Alignment by a Node B in a mobile communication system, the apparatus comprising:

a transceiver for transmitting information for identifying a dedicated preamble on a downlink control channel to User Equipment (UE), receiving from the UE the dedicated preamble based on the information, transmitting a response message corresponding to the transmitted dedicated preamble on a downlink shared channel to the UE and receiving a Channel Quality Indicator (CQI) report from the UE; and

a controller operable to generate the response message including timing adjustment information for establishing Time Alignment and to receive the CQI report based on the information for the CQI report.

14. The apparatus of claim 13, wherein the information for the CQI report comprises information on resource assignment for the CQI report.

15. An apparatus of claim 13, wherein the transceiver transmits downlink data to the UE after establishing Time Alignment.

16. The apparatus of claim 13, wherein the response message further comprises an uplink grant.