RESOURCE ALLOCATING APPARATUS AND METHOD FOR SIMPLEX COMMUNICATION IN WIDEBAND WIRELESS COMMUNICATION SYSTEM

• US 20080032699A1
• Filed: 08/07/2007
• Published: 02/07/2008
• Est. Priority Date: 08/07/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jang, Jae-Hyuk, Kim, Nam-Gi, Cho, Min-Hee, Son, Jung-Je
• Granted Patent: US 7,936,716 B2
• Time in Patent Office: Days
• US Class Current: 455/452.1
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/30 Connection release
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Abstract

A resource allocating apparatus and a method for a Push-To-Talk (PTT) service in a wideband wireless communication system are provided. The method includes, when a Floor Grant message is received from a PTT server, allocating an uplink resource to a corresponding terminal and when a Floor Release message is received from the terminal, aborting the uplink resource allocation. The uplink resource is allocated only to the terminal having the data to be transmitted, and the resources are not allotted to terminals having no data to send.

Claims

1. A method for allocating resources in a wideband wireless communication system, the method comprising:

when a Floor Grant message is received from a Push-To-Talk (PTT) server, allocating an uplink resource to a corresponding terminal; and

when a Floor Release message is received from the terminal, aborting the uplink resource allocation.

2. The method of claim 1, wherein the allocating of the uplink resource comprises:

determining whether a session for a PTT service is established with the corresponding terminal; and

when the session is established, allocating the uplink resource to the corresponding terminal.

3. The method of claim 2, wherein the allocating of the uplink resource further comprises:

when the session is not established, determining whether a Dynamic Service Addition REQuest (DSA-REQ) message is received from a terminal;

when the DSA-REQ message is received from the terminal, establishing a session for the PTT service by sending a DSA-response (RSP) message to the terminal; and

after establishing the session, allocating an uplink resource to the terminal.

4. The method of claim 3, further comprising ending the session for the PTT service when a Floor Grant message is not received from the PTT server within a time period after a speaking message is received from the terminal.

5. The method of claim 3, wherein the DSA-REQ message comprises uplink grant scheduling type information which indicates the resource allocation request for the PTT service.

6. A method for performing a Push-To-Talk (PTT) service in a wideband wireless communication system, the method comprising:

when a Floor Grant message is received from a PTT server, allocating an uplink resource from a Base Station (BS); and

transmitting voice data of a user to another terminal using the allocated uplink resource.

7. The method of claim 6, wherein the allocating of the uplink resource comprises:

when the Floor Grant message is received, determining whether a session for a PTT service is established with the BS;

when the session is not established, transmitting a Dynamic Service Addition REQuest (DSA-REQ) message to the BS; and

receiving a DSA-response (RSP) message from the BS and allocating the uplink resource.

8. The method of claim 7, wherein the allocating of the uplink resource further comprises:

when the session is established, allocating an uplink resource from the BS without the DSA-REQ.

9. The method of claim 6, wherein the DSA-REQ message comprises uplink grant scheduling type information which indicates the resource allocation request for the PTT service.

10. A Base Station (BS) for allocating resources in a wideband wireless communication system, the BS comprising:

a packet classifier for determining whether a Floor Grant message is received from a Push-To-Talk (PTT) server;

a packet analyzer for determining whether a Floor Release message is received from a terminal;

a call manager for requesting resource allocation to a scheduler when a signal informing of the reception of the Floor Grant message is input from the packet classifier, and for requesting resource allocation abortion to the scheduler when a signal informing of the reception of a Floor Release message is input from the packet analyzer; and

the scheduler for allocating an uplink resource to a corresponding terminal and for aborting the uplink resource allocation according to the request of the call manager.

11. The BS of claim 11, further comprising a MAC management message processor for determining whether a session with the terminal is for a PTT service by analyzing a Dynamic Service Addition REQuest (DSA-REQ) message received from the terminal and for outputting the determination result to the call manager.

12. The BS of claim 11, wherein the DSA-REQ message comprises uplink grant scheduling type information which indicates the resource allocation request for the PTT service.

13. A terminal for performing a Push-To-Talk (PTT) service in a wideband wireless communication system, the terminal comprising:

a controller for determining whether a Floor Grant message is received from a PTT server and for requesting to generate a Dynamic Service Addition REQuest (DSA-REQ) message when the Floor Grant message is received;

a message generator for generating the DSA-REQ message which requests resource allocation for a PTT service according to the request; and

a transceiver for transmitting the DSA-REQ message to a corresponding BS.

14. The terminal of claim 13, wherein the DSA-REQ message comprises uplink grant scheduling type information which indicates the resource allocation request for the PTT service.