Method of controlling quality of service for a wireless LAN base station apparatus

• US 20060120339A1
• Filed: 11/30/2005
• Published: 06/08/2006
• Est. Priority Date: 12/08/2004
• Status: Abandoned Application

• Current Assignee: Oki Semiconductor Company Limited (ROHM Co., Ltd.)
• Original Assignee: OKI Electric Industry Company Limited
• Inventors: Hayashi, Masahiko, Akiyama, Hiroyuki, Namura, Takashi
• Application Number:
  US11/289,268
• Publication Number:
  US 20060120339A1
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 1/1678 where the control information is for timing, e.g. time stamps
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 28/10 Flow control between communication endpoints
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

An access point is provided which is able to secure QoS of multimedia traffic. In the method of controlling QoS for wireless LAN base station apparatus used in a wireless LAN system operating in accordance with IEEE 802.11 standard, the base station or access point is included in a network working in an infrastructure mode with other mobile stations controlled in access by the DCF function. When the access point is receiving a first frame sent from the mobile station and holds a multimedia frame to be sent with high-priority after having received the first frame, it loads the Duration/ID field of an ACK frame responding to the first frame with a time required for transmitting the multimedia frame, and then sends the ACK frame.

Claims

1. A method of controlling quality of service for wireless base station apparatus used in a wireless local area network system operating in accordance with IEEE (Institute of Electrical and Electronic Engineers) 802.11 standard, wherein

the base station is included in a network working in an infrastructure mode with a mobile station controlled in access by a DCF (Distributed Coordination Function) function,

the base station, when the base station is receiving a first frame sent from the mobile station and holds a multimedia frame which is to be sent with high-priority after having received the first frame, loading a Duration/ID (Identification) field of an acknowledgement frame responding to the first frame with a period of time required for, or securing a right of, transmitting the multimedia frame to send the acknowledgement frame.

2. A method of controlling quality of service for wireless base station apparatus used in a wireless local area network system operating in accordance with IEEE (Institute of Electrical and Electronic Engineers) 802.11 standard, wherein

the base station is included in a network working in an infrastructure mode with a mobile station controlled in access by a DCF (Distributed Coordination Function) function,

the base station, when the base station is transmitting a first frame to the mobile station and holds a multimedia frame which is to be sent with high-priority after having transmitted the first frame, loading a Duration/ID (Identification) field of the first frame with a period of time added by a time required for, or securing a right of, transmitting the multimedia frame to send the first frame.

3. A method of controlling quality of service for wireless base station apparatus used in a wireless local area network system operating in accordance with IEEE (Institute of Electrical and Electronic Engineers) 802.11 standard, wherein

the base station is included in a network working in an infrastructure mode with a mobile station controlled in access by a DCF (Distributed Coordination Function) function,

the base station, when the base station is receiving a first frame sent from the mobile station and predicts a reception of a multimedia frame with high-priority from a specific mobile station after having received the first frame, loading a Duration/ID (Identification) field of an acknowledgement frame responding to the first frame with a period of time required for receiving at least part of the multimedia frame predicted to send the acknowledgement frame,

the base station thereafter executing, with the specific mobile station, a sequence of clearing a NAV (Network Allocation Vector) timer of the specific mobile station.

4. The method in accordance with claim 3, wherein the sequence is an RTS/CTS (Request To Send/Clear To Send) sequence.

5. The method in accordance with claim 3, wherein the sequence is a Null/ACK (Acknowledgement) sequence.

6. A method of controlling quality of service for wireless base station apparatus used in a wireless local area network system operating in accordance with IEEE (Institute of Electrical and Electronic Engineers) 802.11 standard, wherein

the base station is included in a network working in an infrastructure mode with a mobile station controlled in access by a DCF (Distributed Coordination Function) function,

the base station, when the base station is transmitting a first frame sent to the mobile station and predicts a reception of a multimedia frame with high-priority from a specific mobile station after having transmitted the first frame, loading a Duration/ID (Identification) field of the first frame with a period of time added by a time required for receiving at least part of the multimedia frame predicted to send the first frame,

the base station thereafter executing, with the specific mobile station, a sequence of clearing a NAV (Network Allocation Vector) timer of the specific mobile station.

7. The method in accordance with claim 6, wherein the sequence is an RTS/CTS (Request To Send/Clear To Send) sequence.

8. The method in accordance with claim 6, wherein the sequence is a Null/ACK (Acknowledgement) sequence.

9. A method of controlling quality of service for wireless base station apparatus used in a wireless local area network system operating in accordance with IEEE (Institute of Electrical and Electronic Engineers) 802.11 standard, wherein

the base station is included in a network working in an infrastructure mode with a mobile station controlled in access by a DCF (Distributed Coordination Function) function,

the base station, when the base station is receiving a first frame sent from the mobile station and predicts a reception of a multimedia frame with high-priority from a specific mobile station after having received the first frame, loading a Duration/ID (Identification) field of an acknowledgement frame responding to the first frame with a period of time required for, or securing a right of, transmitting a specific frame to send the acknowledgement frame,

the base station thereafter executing, with the specific mobile station, a sequence of setting a NAV (Network Allocation Vector) timer of a mobile station other than the specific mobile station.

10. The method in accordance with claim 9, wherein the sequence is an RTS/CTS (Request To Send/Clear To Send) sequence.

11. The method in accordance with claim 9, wherein the sequence is a Null/ACK (Acknowledgement) sequence.

12. A method of controlling quality of service for wireless base station apparatus used in a wireless local area network system operating in accordance with IEEE (Institute of Electrical and Electronic Engineers) 802.11 standard, wherein

the base station is included in a network working in an infrastructure mode with a mobile station controlled in access by a DCF (Distributed Coordination Function) function,

the base station, when the base station is transmitting a first frame to the mobile station and predicts a reception of a multimedia frame with high-priority from a specific mobile station after having transmitted the first frame, loading a Duration/ID (Identification) field of the first frame with a period of time added by a time required for, or securing a right of, transmitting a specific frame to send the first frame,

the base station thereafter executing, with the specific mobile station, a sequence of setting a NAV (Network Allocation Vector) timer of a mobile station other than the specific mobile station.

13. The method in accordance with claim 12, wherein the sequence is an RTS/CTS (Request To Send/Clear To Send) sequence.

14. The method in accordance with claim 12, wherein the sequence is a Null/ACK (Acknowledgement) sequence.