METHOD AND APPARATUS FOR SETTING DETOUR PATH IN WIDEBAND HIGH FREQUENCY WIRELESS SYSTEM USING CENTRALIZED MAC PROTOCOL

• US 20100008221A1
• Filed: 07/14/2009
• Published: 01/14/2010
• Est. Priority Date: 07/14/2008
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Kim, Yong Sun, Lee, Woo Yong, HONG, Seung Eun, Kwon, Hyoung Jin, Kim, Kyeongpyo
• Granted Patent: US 8,958,288 B2
• Time in Patent Office: Days
• US Class Current: 370/226
• CPC Class Codes: H04L 41/5054 Automatic deployment of services triggered by the service manager, e.g. service implementation by automatic configuration of network components
• CPC Class Codes: H04L 41/5077 wherein the managed service relates to simple transport services, i.e. providing only network infrastructure
• CPC Class Codes: H04L 43/55 Testing of service level quality, e.g. simulating service usage
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/28 using route fault recovery
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 40/244 using a network of reference devices, e.g. beaconing

Abstract

Provided is a method and apparatus for setting a detour path in a wideband high frequency wireless system using a centralized Media Access Control (MAC) protocol. Here, in a wireless system using the centralized MAC protocol where a time synchronization and a band allocation may be performed by a single central control unit, when a signal blockage occurs while a data communication is being performed via a direct path between a source device and a destination device, the detour path may be quickly provided.

Claims

1. A controlling method of an apparatus for setting a detour path in a wideband high frequency wireless system using a centralized Media Access Control (MAC) protocol, the method comprising:

receiving, by a first device, a beacon message from a piconet coordinator to verify information of the piconet coordinator;

transmitting, by the first device in response to the beacon message, information of the first device to the piconet coordinator, to be registered in the piconet coordinator;

transmitting, by the first device, a probe request to a second device and a relay device, wherein the relay device provides a detour path with respect to a direct communication path between the first device and the second device; and

receiving, by the first device, a response to the probe request from the second device and the relay device to verify information associated with the second device and the relay device.

2. The method of claim 1, wherein the receiving of the response to the probe request from the second device and the relay device to verify information associated with the second device and the relay device comprises:

receiving, by the first device, the response to the probe request from the second device to verify a channel status between the first device and the second device; and

receiving, by the first device, the response to the probe request from the relay device to verify a channel status between the first device and the relay device.

3. The method of claim 1, further comprising:

determining, by the first device, whether the relay device is available based on information associated with the relay device.

4. The method of claim 1, further comprising:

receiving, by the first device, information of other devices from the piconet coordinator to determine whether another relay device in addition to the relay device exists.

5. The method of claim 1, wherein at least one of the beacon message, information of the first device, information of the second device, information of the relay device, and the response from the second device and the relay device to the probe request includes information associated with a relay capacity of the relay device.

6. A controlling method of a piconet coordinator for setting a detour path in a wideband high frequency wireless system using a centralized MAC protocol, the method comprising:

transmitting a beacon message to a first device;

receiving, from the first device, information of the first device as a response to the beacon message;

registering the first device based on information of the first device;

controlling the first device to transmit a probe request to a second device and a relay device, wherein the relay device provides a detour path with respect to a direct communication path between the first device and the second device; and

controlling the first device to receive a response to the probe request from the second device and the relay device to verify information associated with the second device and the relay device.

7. A controlling method of an apparatus for setting a detour path in a wideband high frequency wireless system using a centralized MAC protocol, the method comprising:

generating, by a first device, a relay-beamforming command message for beamforming between the first device and a relay device, wherein the relay device provides a detour path with respect to a direct communication path between the first device and a second device;

transmitting, by the first device, the relay-beamforming command message to the relay device;

determining, by the first device, whether an immediate acknowledgement (IMM-ACK) to the relay-beamforming command message is received from the relay device; and

performing, by the first device, beamforming between the first device and the relay device, when the IMM-ACK is received.

8. The method of claim 7, further comprising:

receiving, by the second device from the relay device, a relay-beamforming command message for beamforming between the second device and the relay device;

transmitting, by the first device, the IMM-ACK to the relay-beamforming command message received from the relay device; and

performing, by the second device, beamforming between the second device and the relay device according to the IMM-ACK.

9. The method of claim 8, further comprising:

generating, by the first device, a relay-beamforming command message for beamforming between the first device and the second device;

transmitting, by the first device, the relay-beamforming command message to the second device;

determining, by the first device, whether the IMM-ACK to the relay-beamforming command message is received from the second device; and

performing, by the first device, beamforming between the first device and the second device when the IMM-ACK is received.

10. The method of claim 9, further comprising:

calculating, by the first device, a channel status of a detour path that is provided by beamforming between the first device and the relay device, and by beamforming between the second device and the relay device;

calculating, by the first device, a channel status of a direct path that is provided by beamforming between the first device and the second device; and

selecting a path based on a comparison result between the calculated channel status of the detour path and the calculated channel status of the direct path.

11. A controlling method of a relay device for setting a detour path in a wideband high frequency wireless system using a centralized MAC protocol, the method comprising:

receiving, by the relay device from a first device, a relay-beamforming command message for beamforming between the first device and the relay device, wherein the relay device provides a detour path with respect to a direct communication path between the first device and the second device;

transmitting, by the relay device, an IMM-ACK to the relay-beamforming command message; and

performing, by the relay device, beamforming between the first device and the relay device according to the IMM-ACK.

12. The method of claim 11, further comprising:

generating, by the relay device, a relay-beamforming command message for beamforming between the second device and the relay device;

transmitting, by the relay device, the relay-beamforming command message to the second device;

determining, by the relay device, whether an IMM-ACK to the relay-beamforming command message is received from the second device; and

performing, by the relay device, beamforming between the relay device and the second device, when the IMM-ACK is received.