Method for performing access procedure of mobile communication terminal in data communication system, and mobile communication terminal using the same

• US 7,697,931 B2
• Filed: 12/06/2006
• Issued: 04/13/2010
• Est. Priority Date: 12/06/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: OH, Seon Ju
• Primary Examiner(s): West; Lewis G
• Assistant Examiner(s): Hong; Dung
• Application Number:
  US11/567,608
• Publication Number:
  US 20070127402A1
• Time in Patent Office: 1,224 Days
• Field of Search: 370/310, 370/328, 370/329, 455/418, 455/423.1, 455/434, 455/435.2, 455/436, 455/552.1, 455/553.1, 455/432.1
• US Class Current: 455/434
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A method and system for performing an access procedure of a mobile communication terminal in a data communication system are disclosed. An exemplary method includes performing an access procedure with a network according to an established access type. The method then determines whether a failure of the access procedure has occurred. A counter value of an access control module is adjusted according to the determined result. Based on the magnitude of the adjusted counter value, the established access type may be abandoned, and another access type may be selected. Therefore, the access procedure suitable for the network environment is executed, such that the probability of success of the access procedure increases.

Claims

1. A method for performing an access procedure of a mobile communication terminal in a data communication system, the method comprising:

a) receiving a command for selecting an access type selection function using an input unit;

b) performing an access procedure with a network according to an established access type, wherein the access procedure comprises a plurality of data transceiving steps;

c) determining whether there is a failure of each of the plurality of data transceiving steps according to satisfying a transceiving failure condition of each of the plurality of date transceiving steps if the access type selection function is performed, wherein the transceiving failure condition is determined by the mobile communication terminal;

wherein the data transceiving steps include;

transmitting a data channel request message to the network;

receiving a first data uplink assignment message from the network in response to the data channel request message;

transmitting a data information request message to the network; and

receiving a second data uplink assignment message from the network in response to the data information request message;

d) adjusting a counter value of an access control module according to the determined result;

e) determining a magnitude of the adjusted counter value in comparison with a reference value;

f) abandoning the established access type and selecting another access type according to the determined magnitude of the adjusted counter value; and

g) performing an access procedure with the network identical to the network at step (b) without a network changing according to the selected another access type.

2. The method according to claim 1, wherein the transceiving failure condition comprises

at least one of conditions that:

the number of transmission times of the data channel request message increases;

the first data uplink assignment message is not received within a predetermined period of time;

the second data uplink assignment message is not received within a predetermined period of time; and

specific information contained in the second data uplink assignment message is different from information stored in the mobile communication terminal.

3. The method according to claim 1, wherein the data transceiving steps comprise:

receiving a data uplink assignment message from the network in response to the data channel request message.

4. The method according to claim 3, wherein the transceiving failure condition comprises at least one of conditions that:

the number of transmission times of the data channel request message increases;

the data uplink assignment message is not received within a predetermined period of time; and

specific information contained in the data uplink assignment message is different from information stored in the mobile communication terminal.

5. The method according to claim 1, wherein the adjusting comprises:

if the failure of at least one step among the plurality of the data transceiving steps is determined, reducing the counter value; and

if the failure of at least one step among the plurality of the data transceiving steps is not determined, increasing the counter value.

6. The method according to claim 5, wherein the abandoning and selecting comprises:

if the counter value is less than the reference value, selecting another access type.

7. The method according to claim 1, wherein the adjusting comprises:

if the failure of at least one step among the plurality of the data transceiving steps is determined, increasing the counter value; and

if the failure of at least one step among the plurality of the data transceiving steps is not determined, reducing the counter value.

8. The method according to claim 7, wherein the abandoning and selecting comprises:

if the counter value is equal to or greater than the reference value, selecting another access type.

9. The method according to claim 1, wherein the access procedure is executed at an acknowledged mode of a Radio Link Control (RLC) layer.

10. The method according to claim 1, wherein:

if the data communication system is a General Packet Radio Service (GPRS) system, and the established access type is a first phase access type, another access type is indicative of a second phase access type; and

if the data communication system is the GPRS system, and the established access type is the second phase access type, another access type is indicative of the first phase access type.

11. A mobile communication terminal for performing an access procedure in a data communication system comprising:

an input unit configured to receive a command for selecting an access type selection function;

a transceiver configured to perform an access procedure with a network according to an established access type, wherein the access procedure comprises a plurality of data transceiving steps;

an access control module configured to determine whether there is a failure of each of the plurality of data transceiving steps according to satisfying a transceiving failure condition of each of the plurality of data transceiving steps if the access type selection function is performed, and to adjust a counter value according to the determined result, wherein the transceiving failure condition is determined by the mobile communication terminal;

wherein the data transceiving steps include;

if a data channel request message is transmitted to the network, receiving a first data uplink assignment message from the network by the transceiver; and

if a data information request message is transmitted to the network, receiving a second data uplink assignment message from the network by the transceiver; and

a controller configured to abandon the established access type and to select another access type according to a magnitude of the adjusted counter value in comparison with a reference value,

wherein the transceiver performs an access procedure with the network identical to the network of the access procedure of the established access type without a network changing according to the selected another access type.

12. The mobile communication terminal according to claim 11, wherein the transceiving failure condition comprises at least one of conditions that:

the number of transmission times of the data channel request message increases;

the first data uplink assignment message is not received within a predetermined period of time;

the second data uplink assignment message is not received within a predetermined period of time; and

specific information contained in the second data uplink assignment message is different from information stored in the mobile communication terminal.

13. The mobile communication terminal according to claim 11, wherein the data transceiving steps comprise:

if a data channel request message is transmitted to the network, the transceiver receives a data uplink assignment message from the network.

14. The mobile communication terminal according to claim 13, wherein the transceiving failure condition comprises at least one of conditions that:

the number of transmission times of the data channel request message increases;

the data uplink assignment message is not received within a predetermined period of time; and

specific information contained in the data uplink assignment message is different from information stored in the mobile communication terminal.

15. The mobile communication terminal according to claim 11, wherein:

the access control module is further configured to reduce the counter value if the failure of at least one step among the plurality of data transceiving steps is detected, and to increase the counter value if the failure of at least one step among the plurality of data transceiving steps is not detected; and

the controller is further configured to select another access type if the counter value of the access control module is less than the reference value.

16. The mobile communication terminal according to claim 11, wherein:

the access control module is further configured to increase the counter value if the failure of at least one step among the plurality of data transceiving steps is detected, and to reduce the counter value if the failure of at least one step among the plurality of data transceiving steps is not detected, and

the controller is further configured to select another access type if the counter value of the access control module is equal to or greater than the reference value.