Methods, apparatus and systems for determining a resource for wake-up signal transmissions
Methods, apparatus and systems for determining a transmission resource for transmitting a wake-up signal in a wireless communication are described. In one embodiment, a method performed by a wireless communication node is disclosed. The method comprises: determining an initial transmission resource for wake-up signal (WUS) transmission; determining an updated transmission resource for WUS transmission based at least on the initial transmission resource and an offset; and transmitting, on the updated transmission resource, a WUS to at least one wireless communication device, wherein the offset is selected from a plurality of predetermined values based on a location of a paging occasion (PO) corresponding to the WUS.
1. A method performed by a wireless communication node, the method comprising:
determining an initial transmission resource for wake-up signal (WUS) transmission;
determining an updated transmission resource for WUS transmission based at least on the initial transmission resource and an offset; and
transmitting, on the updated transmission resource, a WUS to at least one wireless communication device, wherein the offset is selected from a plurality of predetermined values based on a location of a paging occasion (PO) corresponding to the WUS.
2. The method of claim 1 , wherein:
determining the initial transmission resource comprises determining an initial index of the initial transmission resource; and
determining the updated transmission resource comprises determining an updated index of the updated transmission resource based on: the initial index, the offset, and a quantity of transmission resources in a resource set for WUS transmission corresponding to a location gap between the WUS and the PO.
3. The method of claim 2 , wherein the quantity is one, and the resource set includes a single transmission resource that is different from a legacy transmission resource.
4. The method of claim 1 , wherein determining the updated transmission resource comprises:
determining an initial value for a pseudo random sequence;
generating the pseudo random sequence based on the initial value;
selecting a portion from the pseudo random sequence; and
calculating the offset based on the selected portion.
5. The method of claim 4 , wherein the initial value is determined based on at least one of:
an identity (ID) of a cell where the at least one wireless communication device is located;
a current value of a discontinuous reception (DRX) cycle specific to the cell;
a maximum value of the DRX cycle specific to the cell;
a minimum value of the DRX cycle specific to the cell;
a maximum value of a DRX cycle specific to the at least one wireless communication device; and
a minimum value of the DRX cycle specific to the at least one wireless communication device.
6. The method of claim 4 , wherein the portion is selected based on at least one of:
a system frame number (SFN) of the PO corresponding to the WUS;
a Hyper-SFN (H-SFN) of the PO corresponding to the WUS;
a sub-frame number of the PO corresponding to the WUS;
an identity (ID) of a cell where the at least one wireless communication device is located;
a discontinuous reception (DRX) cycle specific to the cell; and
a DRX cycle specific to the at least one wireless communication device.
7. The method of claim 4 , wherein the initial value is determined based on at least one of:
a system frame number (SFN) of the PO corresponding to the WUS;
a Hyper-SFN (H-SFN) of the PO corresponding to the WUS;
a sub-frame number of the PO corresponding to the WUS;
an identity (ID) of a cell where the at least one wireless communication device is located;
a discontinuous reception (DRX) cycle specific to the cell; and
a DRX cycle specific to the at least one wireless communication device.
8. The method of claim 1 , wherein determining the updated transmission resource comprises calculating the offset based on at least one of:
a system frame number (SFN) of the PO corresponding to the WUS;
a Hyper-SFN (H-SFN) of the PO corresponding to the WUS;
a sub-frame number of the PO corresponding to the WUS;
an identity (ID) of a cell where the at least one wireless communication device is located;
a current value of a discontinuous reception (DRX) cycle specific to the cell;
a maximum value of the DRX cycle specific to the cell;
a minimum value of the DRX cycle specific to the cell;
a maximum value of a DRX cycle specific to the at least one wireless communication device;
a minimum value of the DRX cycle specific to the at least one wireless communication device; and
at least one pre-determined integer.
9. The method of claim 1 , wherein:
the offset is determined based on a system frame number (SFN) of the PO corresponding to the WUS;
the offset changes by one as the SFN changes by T, which is a maximum value of a DRX cycle or a predetermined value; and
a value of the offset corresponding to a value of SFN in a current cycle of T is determined based on a value of the offset corresponding to a value of SFN in a previous cycle of T.
10. A method performed by a wireless communication device, the method comprising:
obtaining information about an initial transmission resource for wake-up signal (WUS) detection;
determining an updated transmission resource for WUS detection based at least on the initial transmission resource and an offset; and
detecting, on the updated transmission resource, a WUS transmitted from a wireless communication node, wherein the offset is selected from a plurality of predetermined values based on a location of a paging occasion (PO) corresponding to the WUS.
11. The method of claim 10 , wherein:
obtaining information about an initial transmission resource comprises obtaining an initial index of the initial transmission resource based on a signaling from the wireless communication node or based on a group to which the wireless communication device belongs for WUS detection; and
determining the updated transmission resource comprises determining an updated index of the updated transmission resource based on: the initial index, the offset, and a quantity of transmission resources in a resource set for WUS detection corresponding to a location gap between the WUS and the PO.
12. The method of claim 10 , wherein determining the updated transmission resource comprises:
determining an initial value for a pseudo random sequence;
generating the pseudo random sequence based on the initial value;
selecting a portion from the pseudo random sequence; and
calculating the offset based on the selected portion.
13. The method of claim 12 , wherein the initial value is determined based on at least one of:
an identity (ID) of a cell where the wireless communication device is located;
a current value of a discontinuous reception (DRX) cycle specific to the cell;
a maximum value of the DRX cycle specific to the cell;
a minimum value of the DRX cycle specific to the cell;
a maximum value of a DRX cycle specific to the wireless communication device; and
a minimum value of the DRX cycle specific to the wireless communication device.
14. The method of claim 12 , wherein the portion is selected based on at least one of:
a system frame number (SFN) of the PO corresponding to the WUS;
a Hyper-SFN (H-SFN) of the PO corresponding to the WUS;
a sub-frame number of the PO corresponding to the WUS;
an identity (ID) of a cell where the wireless communication device is located;
a discontinuous reception (DRX) cycle specific to the cell; and
a DRX cycle specific to the wireless communication device.
15. The method of claim 12 , wherein the initial value is determined based on at least one of:
a system frame number (SFN) of the PO corresponding to the WUS;
a Hyper-SFN (H-SFN) of the PO corresponding to the WUS;
a sub-frame number of the PO corresponding to the WUS;
an identity (ID) of a cell where the wireless communication device is located;
a discontinuous reception (DRX) cycle specific to the cell; and
a DRX cycle specific to the wireless communication device.
16. The method of claim 10 , wherein determining the updated transmission resource comprises calculating the offset based on at least one of:
a system frame number (SFN) of the PO corresponding to the WUS;
a Hyper-SFN (H-SFN) of the PO corresponding to the WUS;
a sub-frame number of the PO corresponding to the WUS;
an identity (ID) of a cell where the wireless communication device is located;
a current value of a discontinuous reception (DRX) cycle specific to the cell;
a maximum value of the DRX cycle specific to the cell;
a minimum value of the DRX cycle specific to the cell;
a maximum value of a DRX cycle specific to the wireless communication device;
a minimum value of the DRX cycle specific to the wireless communication device; and
at least one pre-determined integer.
17. The method of claim 16 , wherein the offset is calculated based on at least one of: a modulo operation, a division operation, and a floor function.
18. The method of claim 10 , wherein:
the offset is determined based on a system frame number (SFN) of the PO corresponding to the WUS;
the offset changes by one as the SFN changes by T, which is a maximum value of a DRX cycle or a predetermined value; and
a value of the offset corresponding to a value of SFN in a current cycle of T is determined based on a value of the offset corresponding to a value of SFN in a previous cycle of T.
19. A wireless communication device comprising:
a memory storing a plurality of instructions; and
a processor configured to execute the plurality of instructions, and upon execution of the plurality of instructions, is configured to:
determine an initial transmission resource for wake-up signal (WUS) transmission;
determine an updated transmission resource for WUS transmission based at least on the initial transmission resource and an offset; and
transmit, on the updated transmission resource, a WUS to at least one wireless communication device, wherein the offset is selected from a plurality of predetermined values based on a location of a paging occasion (PO) corresponding to the WUS.
20. A wireless communication device comprising:
a memory storing a plurality of instructions; and
a processor configured to execute the plurality of instructions, and upon execution of the plurality of instructions, is configured to:
obtain information about an initial transmission resource for wake-up signal (WUS) detection;
determine an updated transmission resource for WUS detection based at least on the initial transmission resource and an offset; and
detect, on the updated transmission resource, a WUS transmitted from a wireless communication node, wherein the offset is selected from a plurality of predetermined values based on a location of a paging occasion (PO) corresponding to the WUS.