Wireless communication system and wireless communication method

• US 20050220050A1
• Filed: 02/16/2005
• Published: 10/06/2005
• Est. Priority Date: 02/19/2004
• Status: Active Grant

• Current Assignee: American Target Systems, Inc., Hitachi Kokusai Electric Incorporated (Hitachi, Ltd.)
• Original Assignee: American Target Systems, Inc.
• Inventors: Uchida, Minoru
• Granted Patent: US 7,428,225 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Abstract

A wireless communication system consisting of a base station and a plurality of mobile stations capable of conducting wireless communication with the base station. Each mobile station has a press button which accepts an order issued by an operator to execute a request for acquiring a transmission right, and a control section. The press button maintains depression electrically or mechanically. The control section in each of the mobile stations is adapted to execute a request for acquiring the transmission right, in response to acceptance of an order conducted by the press button. If the control section fails in acquiring the transmission right by executing the request, the control section is adapted to execute the request for acquiring the transmission right again.

Claims

1. A wireless communication system, comprising:

a base station; and

a plurality of mobile stations capable of conducting wireless communication with said base station by using a simplex system, each of the mobile stations comprising an order accepting section (MMIF 32) to accept an order issued by an operator to execute a request for acquiring a transmission right, and a control section,

said control section in each of the mobile stations is adapted to execute a request for acquiring the transmission right, in response to acceptance of an order in said order accepting section, and

if said control section fails in acquiring the transmission right by executing the request, said control section is adapted to execute the request for acquiring the transmission right again.

2. The wireless system according to claim 1, wherein each of the mobile stations further comprises a status information output section to provide the operator with information concerning a status of acquisition of the transmission right.

3. The wireless system according to claim 2, wherein

the execution of the request for acquiring the transmission right in said control section in each of the mobile stations comprises conducting wireless transmission of a request signal for acquiring the transmission right to said base station,

upon receiving the request signal from any of the mobile stations, said base station is adapted to conduct wireless transmission of a transmission right giving signal to the mobile station,

upon receiving the transmission right giving signal from said base station, said control section in the mobile station is adapted to conduct wireless transmission of a transmission right giving answer signal to said base station,

upon receiving the transmission right giving answer signal, said base station is adapted to set a radio information channel on a physical radio channel, and

said status information output section in the mobile station provides the operator with information of a transmission right acquisition status.

4. The wireless system according to claim 3, wherein

if the transmission right giving signal is not received from said base station within a predetermined time after the wireless transmission of the request signal to said base station, said control section in the mobile station is adapted to conduct wireless transmission of the request signal for acquiring the transmission right to said base station again, and

said control section in the mobile station is adapted to conduct re-execution of the request for acquiring the transmission right up to a predetermined number of times at maximum, in response to an order issued by the operator once and accepted by said order accepting section.

5. A mobile station which conducts wireless communication, comprising:

an order accepting section for accepting an order issued by an operator to execute a request for acquiring a transmission right; and

a control section,

wherein said control section is adapted to execute the request for acquiring the transmission right, in response to acceptance of an order in said order accepting section, and

if said control section fails in acquiring the transmission right by executing the request, said control section is adapted to execute the request for acquiring the transmission right again.

6. The mobile station according to claim 5, wherein

said order accepting section comprises:

a once execution order accepting section to accept an order that specifies once request execution as an order of execution of a request for acquiring the transmission right; and

a continuous execution order accepting section to accept an order that specifies continuous request execution as an order of execution of a request for acquiring the transmission right, and

if an order is accepted by said once execution order accepting section, said control section is adapted to execute a request for acquiring the transmission right only once, and

if an order is accepted by said continuous execution order accepting section, said control section is adapted to execute a request for acquiring the transmission right at least twice except when the transmission right is acquired by executing the request for acquiring the transmission right only once.

7. A wireless communication method in a wireless communication system including a base station, and a plurality of mobile stations capable of conducting wireless communication with said base station by using a simplex system, the wireless communication method comprising the steps of:

executing a request for acquiring a transmission right in one of the mobile stations, in response to acceptance, in an order accepting section in the mobile station, of an order issued by an operator to execute the request for acquiring the transmission right; and

executing the request for acquiring the transmission right again in response to a failure in acquiring the transmission right.

8. The wireless communication method according to claim 7, further comprising the step of providing the operator with information concerning a situation of acquisition of the transmission right.

9. The wireless communication method according to claim 8, wherein

the step of executing a request for acquiring the transmission right in the mobile station comprises conducting wireless transmission of a request signal for acquiring the transmission right to said base station,

upon receiving the request signal from the mobile station, said base station conducts wireless transmission of a transmission right giving signal to the mobile station,

the step of executing a request for acquiring the transmission right in the mobile station further comprises conducting wireless transmission of a transmission right giving answer signal to said base station upon receiving the transmission right giving signal from said base station, and

upon receiving the transmission right giving answer signal, said base station sets a radio information channel on a physical radio channel.

10. The wireless communication method according to claim 9, further comprising the step of conducting wireless transmission of the request signal for acquiring the transmission right to said base station again if the transmission right giving signal is not received from said base station within a predetermined time after the wireless transmission of the request signal to said base station,

wherein the step is repeated up to a predetermined number of times at maximum, in response to an order issued by the operator once and accepted by said order accepting section.

11. A computer program for executing wireless communication in a wireless communication system including a base station and a plurality of mobile stations by executing the steps of:

executing a request for acquiring a transmission right in one of the mobile stations, in response to acceptance, in an order accepting section in the mobile station, of an order issued by an operator to execute the request for acquiring the transmission right; and

executing the request for acquiring the transmission right again in response to a failure in acquiring the transmission right.

12. A computer-readable recording medium storing a computer program for executing wireless communication in a wireless communication system including a base station and a plurality of mobile stations by executing the steps of:

executing a request for acquiring a transmission right in one of the mobile stations, in response to acceptance, in an order accepting section in the mobile station, of an order issued by an operator to execute the request for acquiring the transmission fight; and

executing the request for acquiring the transmission right again in response to a failure in acquiring the transmission right.