Method and apparatus for setting detour path in wideband high frequency wireless system using centralized MAC protocol
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.
1. An operating method of a source device in a network, the method comprising:
receiving relay capabilities element information of at least one device;
selecting, by the source device, a relay device, to provide a detour path with respect to a direct communication path between the source device and a destination device, from the at least one device based on the relay capabilities element information,
wherein the relay capabilities element information comprises:
a relay supportability field indicating whether the at least one device is capable of relaying by transmitting and receiving frames between a pair of other devices, and
a relay preference field indicating whether the at least one device prefers to be either the relay device or one of the source device and the destination device;
performing, by the source device, a first beam forming process with the selected relay device, wherein the selected relay device performs a second beamforming process with the destination device;
obtaining a channel status of the detour path between the source device, the selected relay device, and the destination device as a result of the first beam forming process and the second beam forming process;
performing, by the source device, a third beam forming process with the destination device;
obtaining a channel status of the direct communication path between the source device and the destination device as a result of the third beamforming process;
comparing, by the source device, information associated with the channel status of the detour path with the information associated with the channel status of the direct communication path; and
transmitting, by the source device, data to the destination device via whichever one of the detour path and the direct communication path has a better channel status.
2. The method of claim 1 , further comprising verifying whether the destination device is capable of using the detour path based on relay capabilities element information of the destination device.
3. The method of claim 1 , wherein the relay capabilities element information further includes a relay usability field, the relay usability field indicating whether a corresponding device is capable of frame relaying through the detour path.
4. The method of claim 1 , wherein the source device, the destination device, and the relay device belong to a same network.
5. The method of claim 1 , wherein the selecting of the relay device comprises transmitting a probe request command message and receiving a probe response command message that includes the relay capabilities element information.