Method and device for device discovery using UWB
The disclosure relates to a method and a device for device discovery using ultra-wideband (UWB). A method for a first UWB includes transmitting a control message including information on a contention window for contention-based access by using a UWB communication scheme; receiving a scheduling request message for scheduling-based access, in a slot in the contention window from a second UWB device by using the UWB communication scheme; and configuring a scheduled slot for the second UWB device, based on the scheduling request message. The scheduling request message may be used for in-band device discovery.
1 . A method of a first ultra-wideband (UWB) device, the method comprising:
transmitting, by using a Bluetooth low energy (BLE) communication scheme, a BLE advertising packet comprising an in-band discovery indicator indicating whether a UWB-based device discovery is used or a BLE-based device discovery is used, wherein when the in-band discovery indicator indicates the UWB-based device discovery is used, the BLE advertising packet comprises UWB channel information, a UWB preamble code index, and a UWB physical layer parameter set;
transmitting a control message comprising first information on a contention window for contention-based access by using a UWB communication scheme, second information on a ranging device management list for a contention free window, and third information related to a size of the ranging device management list, the second information including an address for at least one UWB device; and
receiving, from a second UWB device, a ranging response message, in a slot in the contention window by using the UWB communication scheme,
wherein the ranging response message includes an address of the second UWB device and request of allocation of a ranging slot in the contention free window,
wherein the address of the second UWB device is not included in the ranging device management list,
wherein the first information indicates a number of ranging slots used in the contention window, and
wherein a slot in which the control message is transmitted and slots in the contention window are included together in a ranging period.
2 . The method of claim 1 , wherein the contention window starts from a slot immediately following the slot in which the control message is transmitted.
3 . The method of claim 1 , wherein the ranging period includes at least one scheduled slot for scheduling-based access, and
wherein the first information on the contention window includes information on a start slot of the contention window and information on an ending slot of the contention window.
4 . The method of claim 1 , wherein the slot in which the control message is transmitted corresponds to a first slot in the ranging period.
5 . The method of claim 1 , wherein the control message further comprises information related to a UWB session.
6 . The method of claim 1 , wherein a contention window size is determined based on a ratio of slots used in the contention window of the ranging period.
7 . The method of claim 1 ,
wherein the contention free window is included in the contention window.
8 . The method of claim 1 , further comprising receiving, from the second UWB device, a message including information on request for scheduling, in the contention window.
9 . A method of a second ultra-wideband (UWB) device, the method comprising:
receiving, by using a Bluetooth low energy (BLE) communication scheme, a BLE advertising packet comprising an in-band discovery indicator indicating whether a UWB-based device discovery is used or a BLE-based device discovery is used, wherein when the in-band discovery indicator indicates the UWB-based device discovery is used, the BLE advertising packet comprises UWB channel information, a UWB preamble code index, and a UWB physical layer parameter set;
receiving, from a first UWB device, a control message comprising first information on a contention window for contention-based access by using a UWB communication scheme, second information on a ranging device management list for a contention free window, and third information related to a size of the ranging device management list, the second information including an address for at least one UWB device; and
transmitting, to the first UWB device, a ranging response message, in a slot in the contention window by using the UWB communication scheme,
wherein the ranging response message includes an address of the second UWB device and request of allocation of a ranging slot in the contention free window,
wherein the address of the second UWB device is not included in the ranging device management list,
wherein the first information indicates a number of ranging slots used in the contention window, and
wherein a slot in which the control message is transmitted and slots in the contention window are included together in a ranging period.
10 . The method of claim 9 , wherein the contention window starts from a slot immediately following the slot in which the control message is transmitted.
11 . The method of claim 9 , wherein the ranging period includes at least one scheduled slot for scheduling-based access, and
wherein the first information on the contention window includes information on a start slot of the contention window and information on an ending slot of the contention window.
12 . The method of claim 9 , wherein the slot in which the control message is transmitted corresponds to a first slot in the ranging period.
13 . The method of claim 9 , wherein the control message further comprises information related to a UWB session.
14 . The method of claim 9 , wherein a contention window size is determined based on a ratio of slots used in the contention window of the ranging period.
15 . The method of claim 9 ,
wherein the contention free window is included in the contention window.
16 . The method of claim 9 , further comprising transmitting, to the first UWB device, a message including information on request for scheduling, in the contention window.
17 . A first ultra-wideband (UWB) device comprising:
a transceiver; and
a controller configured to:
transmit, by using a Bluetooth low energy (BLE) communication scheme, a BLE advertising packet comprising an in-band discovery indicator indicating whether a UWB-based device discovery is used or a BLE-based device discovery is used, wherein when the in-band discovery indicator indicates the UWB-based device discovery is used, the BLE advertising packet comprises UWB channel information, a UWB preamble code index, and a UWB physical layer parameter set;
transmit a control message comprising first information on a contention window for contention-based access by using a UWB communication scheme, second information on a ranging device management list for a contention free window, and third information related to a size of the ranging device management list, the second information including an address for at least one UWB device; and
receive, from a second UWB device, a ranging response message, in a slot in the contention window by using the UWB communication scheme,
wherein the ranging response message includes an address of the second UWB device and request of allocation of a ranging slot in the contention free window,
wherein the address of the second UWB device is not included in the ranging device management list,
wherein the first information indicates a number of ranging slots used in the contention window, and
wherein a slot in which the control message is transmitted and slots in the contention window are included together in a ranging period.
18 . The first UWB device of claim 17 ,
wherein the contention free window is included in the contention window.
19 . The first UWB device of claim 17 , wherein the controller is configured to receive, from the second UWB device, a message including information on request for scheduling, in the contention window.
20 . A second ultra-wideband (UWB) device comprising:
a transceiver; and
a controller configured to:
receive, by using a Bluetooth low energy (BLE) communication scheme, a BLE advertising packet comprising an in-band discovery indicator indicating whether a UWB-based device discovery is used or a BLE-based device discovery is used, wherein when the in-band discovery indicator indicates the UWB-based device discovery is used, the BLE advertising packet comprises UWB channel information, a UWB preamble code index, and a UWB physical layer parameter set;
receive, from a first UWB device, a control message comprising first information on a contention window for contention-based access by using a UWB communication scheme, second information on ranging device management list for a contention free window, and third information related to a size of the ranging device management list, the second information comprising address for at least one UWB device; and
transmit, to the first UWB device, a ranging response message, in a slot in the contention window by using the UWB communication scheme,
wherein the ranging response message includes an address of the second UWB device and request of allocation of a ranging slot in the contention free window,
wherein the address of the second UWB device is not included in the ranging device management list,
wherein the first information indicates a number of ranging slots used in the contention window, and
wherein a slot in which the control message is transmitted and slots in the contention window are included together in a ranging period.
21 . The second UWB device of claim 20 ,
wherein the contention free window is included in the contention window.
22 . The second UWB device of claim 20 , wherein the controller is configured to transmit, to the first UWB device, a message including information on request for scheduling, in the contention window.