Discontinuous reception method for mobile communication terminal device and mobile communication terminal device

• US 7,463,900 B2
• Filed: 03/17/2005
• Issued: 12/09/2008
• Est. Priority Date: 09/27/2004
• Status: Expired due to Fees

• Current Assignee: Fujitsu Mobile Communications Limited (Fujitsu Limited)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Wan, Wang
• Primary Examiner(s): Lee; John J
• Application Number:
  US11/082,741
• Publication Number:
  US 20060084408A1
• Time in Patent Office: 1,363 Days
• Field of Search: 455/411, 455/419, 455/428, 455/412.1, 455/416, 455/414.1, 455/343.4, 455/518, 455/519, 455/510, 455/517, 455/520, 455/516, 455/528, 455/415, 455/450, 455/452.1, 455/509, 455/515, 370/335, 370/352
• US Class Current: 455/518
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A discontinuous reception method for a mobile communication terminal device and a mobile communication terminal device which, when a PTT (Push-to-Talk) system call is provided, make it possible to reduce the amount of electrical power consumed by the mobile communication terminal device and to start a PTT-system telephone call with a short wait time. The mobile communication terminal device performs discontinuous reception in a long discontinuous reception cycle in a standby state when the mobile communication terminal device is not a member of a PTT session (step S14) and performs discontinuous reception in a short discontinuous reception cycle in a standby state when the mobile communication terminal device is a member of the PTT session and the PTT call is in a dormant state (step S23).

Claims

1. A method for a mobile communication terminal device having a push-to-talk system call function, the method comprising:

becoming a member of a push-to-talk session;

obtaining the floor in the push-to-talk session;

transmitting a speech signal while the floor is obtained in the push-to-talk session;

releasing the floor in the push-to-talk session; and

upon releasing the floor, waking up discontinuously, by waking up each time a second discontinuous reception cycle elapses, if the mobile communication terminal remains a member of the push-to-talk session; and

waking up discontinuously, by waking up each time a first discontinuous reception cycle elapses, when the mobile communication terminal is not a member of the push-to-talk session;

wherein the second discontinuous reception cycle is shorter than the first discontinuous reception cycle.

2. The method according to claim 1, further comprising terminating the push-to-talk session, and then waking up discontinuously, by waking up each time the first discontinuous reception cycle elapses.

3. The method according to claim 1, further comprising withdrawing from the push-to-talk session, and then waking up discontinuously, by waking up each time the first discontinuous reception cycle elapses.

4. The method according to claim 1, wherein becoming a member of the push-to-talk session comprises identifying at least one other mobile communication terminal device to be a member of the push-to-talk session, and transmitting a push-to-talk session establishment request which includes information identifying the at least one other mobile communication terminal device.

5. The method according to claim 4, further comprising terminating the push-to-talk session, and then waking up discontinuously, by waking up each time the first discontinuous reception cycle elapses.

6. The method according to claim 1, wherein becoming a member of the push-to-talk session comprises joining a push-to-talk session requested by another mobile communication terminal, and then waking up discontinuously, by waking up each time the second discontinuous reception cycle elapses.

7. The method according to claim 6, further comprising withdrawing from the push-to-talk session, and then waking up discontinuously, by waking up each time the first discontinuous reception cycle elapses.

8. The method according to claim 1, further comprising receiving a speech signal from another mobile communication terminal which has obtained the floor in the push-to-talk session, and then waking up discontinuously, by waking up each time the second discontinuous reception cycle elapses, upon release of the floor.

9. The method according to claim 1, wherein respective lengths T, in seconds, of the first discontinuous reception cycle and the second discontinuous reception cycle are set in accordance with the equation:

T=2ⁱ×

1.28,

where i is a respective slot cycle index for each of the first and second discontinuous reception cycles.

10. The method according to claim 9, wherein the slot cycle index i is 2 for the first discontinuous reception cycle and the slot cycle index i is 0 for the second discontinuous reception cycle.

11. A method for a mobile communication terminal device having a push-to-talk system call function, the method comprising:

becoming a member of a push-to-talk session;

receiving a speech signal from another mobile communication terminal which has obtained the floor in the push-to-talk session;

upon release of the floor by said another mobile communication terminal, waking up discontinuously, by waking up each time a second discontinuous reception cycle elapses, if the mobile communication terminal remains a member of the push-to-talk session; and

waking up discontinuously, by waking up each time a first discontinuous reception cycle elapses, when the mobile communication terminal is not a member of the push-to-talk session;

wherein the second discontinuous reception cycle is shorter than the first discontinuous reception cycle.

12. A method for a mobile communication terminal device having a push-to-talk system call function, the method comprising:

determining whether a mode in which a push-to-talk session is permitted is established, and then waking up discontinuously, by waking up each time a first discontinuous reception cycle elapses;

becoming a member of a push-to-talk session, only if it is determined that the mode in which a push-to-talk session is permitted is established;

obtaining the floor in the push-to-talk session;

transmitting a speech signal while the floor is obtained in the push-to-talk session;

releasing the floor in the push-to-talk session; and

upon releasing the floor, waking up discontinuously, by waking up each time a second discontinuous reception cycle elapses, if the mobile communication terminal remains a member of the push-to-talk session; and

waking up discontinuously, by waking up each time the first discontinuous reception cycle elapses, when the mobile communication terminal is not a member of the push-to-talk session;

wherein the second discontinuous reception cycle is shorter than the first discontinuous reception cycle.