WIRELESS STATION, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

• US 20130100937A1
• Filed: 09/13/2012
• Published: 04/25/2013
• Est. Priority Date: 10/25/2011
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Fujita, Hiroshi
• Granted Patent: US 9,231,739 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 2001/0092 Error control systems characterised by the topology of the transmission link
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A wireless station includes a receiver configured to receive a packet, a processor configured to set a retransmission start time of a packet transmitted to another wireless station based on the received packet, and a transmitter configured to control transmission of a packet that is the same as the transmitted packet in accordance with whether a response signal responsive to the transmitted packet is received before the set retransmission start time is reached.

Claims

1. A wireless station comprising:

a receiver configured to receive a packet;

a processor configured to set a retransmission start time of a packet transmitted to another wireless station based on the received packet; and

a transmitter configured to control transmission of a packet that is the same as the transmitted packet in accordance with whether a response signal responsive to the transmitted packet is received before the set retransmission start time is reached.

2. The wireless station according to claim 1,

wherein the processor identifies a wireless station that transmitted the received packet based on the received packet and sets the retransmission start time in accordance with the identified wireless station.

3. The wireless station according to claim 1,

wherein the processor measures a reception end time of the received packet and sets the retransmission start time in accordance with the measured reception end time.

4. The wireless station according to claim 1,

wherein the processor computes a communication condition of the other wireless station based on the received packet and sets the retransmission start time in accordance with the computed communication condition.

5. The wireless station according to claim 1,

wherein upon receipt of a new packet from the wireless station that transmitted the received packet within a given period of time after the packet was received, the processor sets the retransmission start time based on the new received packet.

6. The wireless station according to claim 1,

wherein the processor computes a period of time during which the other wireless station is allowed to transmit a packet and sets the retransmission start time of the transmitted packet in accordance with the computed period of time.

7. A wireless station comprising:

a receiver configured to receive a packet;

a processor configured to compute a period of time during which another wireless station that transmitted the received packet is allowed to transmit a packet; and

a transmitter configured to transmit a packet to the wireless station that transmitted the received packet based on the computed period of time.

8. A communication system comprising:

a first wireless station among wireless stations communicating with each other including

a transmitter configured to transmit a first packet; and

a second wireless station among the wireless stations including

a receiver configured to receive the first packet,

a processor configured to set a retransmission start time of a second packet transmitted to another wireless station among the wireless stations based on the first packet, and

a transmitter configured to control transmission of a packet that is the same as the second packet in accordance with whether a response signal responsive to the second packet is received before the set retransmission start time;

wherein each of the wireless stations other than the second wireless station includes a transmitter configured to return a response signal responsive to a second packet in accordance with a reception condition of the second packet.

9. A communication method comprising:

receiving a packet at a wireless station among wireless stations communicating with each other;

setting a retransmission start time of a packet transmitted to another wireless station among the wireless stations based on the received packet; and

controlling transmission of a packet that is the same as the transmitted packet in accordance with whether a response signal responsive to the transmitted packet is received before the set retransmission start time is reached.

10. The communication method according to claim 9, wherein

the setting identifies a wireless station that transmitted the received packet based on the received packet and sets the retransmission start time in accordance with the identified wireless station.

11. The wireless station according to claim 9, wherein

the setting measures a reception end time of the received packet and sets the retransmission start time in accordance with the measured reception end time.

12. The wireless station according to claim 9, wherein

the setting computes a communication condition of the other wireless station based on the received packet and sets the retransmission start time in accordance with the computed communication condition.

13. The wireless station according to claim 9, wherein

upon receipt of a new packet from the wireless station that transmitted the received packet within a given period of time after the packet was received, the setting sets the retransmission start time based on the new received packet.

14. The wireless station according to claim 9, wherein

the setting computes a period of time during which the other wireless station is allowed to transmit a packet and sets the retransmission start time of the transmitted packet in accordance with the computed period of time.