APPARATUS AND METHOD FOR BROADBAND WIRELESS LOCAL AREA COMMUNICATION

• US 20190312632A1
• Filed: 06/24/2019
• Published: 10/10/2019
• Est. Priority Date: 02/16/2010
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: CHANG, Kap Seok, KWON, Hyoung Jin, JIN, Sung Geun, KIM, Yong Sun, HONG, Seung Eun, LEE, Woo Yong, CHUNG, Hyun Kyu
• Granted Patent: US 10,812,175 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04B 7/15592 Adapting at the relay station communication parameters for supporting cooperative relaying, i.e. transmission of the same data via direct - and relayed path cooperative diversity H04B7/024
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

Provided is an apparatus and method for wideband short-range wireless communication using a directional antenna in a millimeter wave band, and the method for wideband short-range wireless communication according to an embodiment may determine a first time interval and a second time interval for a cooperated data frame transfer based on a packet transmission time at each transmission from a source node to a destination node, transmit a frame to a relay node through an antenna pattern directed towards the relay node at a start point of the first time interval, and transmit the frame to the destination node through an antenna pattern directed towards the destination node after a predetermined period of time from a start point of the second time interval.

Claims

1. A method for wireless communication performed by a source node, the method comprising:

determining a first time interval and a second time interval for a cooperated data frame transfer based on a packet transmission time at each transmission from a source node to a destination node;

transmitting a frame to a relay node through an antenna pattern directed towards the relay node at a start point of the first time interval; and

transmitting the frame to the destination node through an antenna pattern directed towards the destination node after a predetermined period of time (Ptime) from a start point of the second time interval,

wherein the second time interval is allocated after the first time interval, and

wherein the relay node transmits the frame to destination node after the predetermined period of time (Ptime) from the start point of the second time interval,

2. The method of claim 1, wherein:

the first time interval is determined based on a period of time during which the source node transmits the frame to the relay node, and

the second time interval is determined based on a predetermined period of time, a period of time during which the relay node transmits a frame received from the source node to the destination node, a period of time during which the source node transmits the frame to the destination node, a period of time during which the destination node transmits an acknowledgment (ACK) frame to the source node, and a short inter-frame space (SIFS).

3. The method of claim 2, wherein:

the first time interval is repeated within an assigned service period, and repeated first time intervals are determined to be the same value or different values, and

the second time interval is repeated within an assigned service period, and repeated second time intervals are determined to be the same value or different values.

4. The method of claim 1, further comprising:

requesting an access point (AP) or a Personal basic service set Control Point (PCP) for an assignment of a resource corresponding to a service period; and

receiving the assignment of the service period from the AP or the PCP.

5. The method of claim 4, wherein the requesting comprises requesting the assignment of the service period using, as a start signal, a signal indicating a successful transmission time point adjustment when the source node transmits a frame and a successful transmission time point adjustment when the relay node transmits a frame.

6. The method of claim 1, further comprising:

receiving an ACK frame indicating the frame is received from the destination node within the second time interval.

7. The method of claim 1, further comprising:

measuring a quality of a link between the source node and the relay node, a quality of a link between the relay node and the destination node, and a quality of a link between the source node and the destination node,

wherein the determining comprises determining the first time interval and the second time interval based on information about the quality of the link between the source node and the relay node, information about the quality of the link between the relay node and the destination node, and information about the quality of the link between the source node and the destination node.

8. The method of claim 7, further comprising:

transmitting information about the measured qualities of links to the AP or the PCP; and

receiving, from the AP or the PCP, a further assignment of a resource based on the information about the measured qualities of links.

9. The method of claim 7, wherein the measuring comprises receiving, from the relay node, the information about the quality of the link between the source node and the relay node and the information about the quality of the link between the relay node and the destination node.

10. The method of claim 4, wherein the AP or the PCP transmits information about the assignment of a resource, for each direction and based on a period of time, through a beam pattern formed in all directions of the AP or the PCP.

11. The method of claim 1, wherein the transmitting of a frame to the relay node comprises setting a medium access control (MAC) address of the source node to a transmitter address of an MAC header, setting an MAC address of the destination node to a receiver address of the MAC header, and transmitting the frame.

12. The method of claim 1, wherein the predetermined period of time corresponds to a sum of a preset period of time from a start point of the second time interval and a propagation delay time occurring at a transmission from the source node to the relay node.

13. The method of claim 1, further comprising:

receiving an ACK frame from the relay node after a predetermined period of time and an SIFS from the start point of the first time interval,

wherein the transmitting of a frame to the relay node comprises transmitting the frame for the predetermined period of time.

14. The method of claim 13, further comprising:

receiving an ACK frame from the destination node and receiving an ACK frame from the relay node after an SIFS is passed after a transmission of the frame to the destination node is completed within the second time interval.

15. A method for wireless communication performed by a relay node, the method comprising:

receiving a frame from a source node through an antenna pattern directed towards the source node, during a first time interval; and

transmitting the received frame to the destination node through an antenna pattern directed towards the destination node after a predetermined period of time (Ptime) from a start point of a second time interval,

wherein the second time interval is allocated after the first time interval, and

wherein the source node transmits the frame to destination node after the predetermined period of time (Ptime) from the start point of the second time interval,

wherein the source node transmits a relay link setup teardown frame to the relay node, and the destination node, when a link cooperation process is completed.

16. The method of claim 15, wherein the predetermined period of time corresponds to a sum of a preset period of time and a period of time obtained by subtracting a propagation delay time, occurring at a transmission from the destination node to the relay node, from a propagation delay time, occurring at a transmission from the destination node to the source node.

17. The method of claim 16, wherein the relay node operates by a half-duplex scheme to receive the frame from the source node, and transmits the received frame to the destination node.

18. The method of claim 15, wherein the transmitting comprises setting a medium access control (MAC) address of the source node to a transmitter address of an MAC header, setting an MAC address of the destination node to a receiver address of the MAC header, and transmitting the received frame.

19. The method of claim 15, further comprising:

measuring a quality of a link between the source node and the relay node and a quality of a link between the relay node and the destination node; and

transmitting, to the source node, information about the quality of the link between the source node and the relay node and information about the quality of the link between the relay node and the destination node.

20. A method for wireless communication performed by a destination node, the method comprising:

receiving a frame from a relay node and a source node in a second time interval after a first time interval;

transmitting an acknowledgment (ACK) frame indicating a reception of the frame after SIFS (Short Inter-Frame Space) within the second time interval to the source node,

wherein the second time interval is allocated after the first time interval, and

wherein the source node transmits the frame to the relay node in the first time internal from a start point of the first time interval,

wherein the destination node receives the frame from the relay node and source node after the predetermined period of time (Ptime) from a start point of the second time interval.