Synchronization signal design for network energy savings

Patent metadata

Field	Value
Publication number	US-2026046762-A1
Application number	US-202418797335-A
Country	US
Kind code	A1
Filing date	Aug 7, 2024
Priority date	Aug 7, 2024
Publication date	Feb 12, 2026
Grant date	—

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a synchronization signal for a cell. The synchronization signal may include a discovery reference signal identifier (DRSIdx) corresponding to an index of the synchronization signal within a burst of synchronization signals. The UE may transmit a wake up signal (WUS) via resources of the cell that are determined based on the DRSIdx. The UE may receive a PBCH of the cell based on transmitting the WUS.

First claim

What is claimed is:

1 . A user equipment (UE), comprising:
one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:
receive a synchronization signal for a cell, wherein the synchronization signal comprises a discovery signal identifier corresponding to an index of the synchronization signal within a burst of synchronization signals;
transmit a wake up signal via resources of the cell that are determined based at least in part on the discovery signal identifier; and
receive a physical broadcast channel of the cell based at least in part on transmitting the wake up signal.

2 . The UE of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive, via the synchronization signal for the cell, a virtual cell identifier of the cell, wherein the virtual cell identifier is associated with a physical cell identifier of the cell.

3 . The UE of claim 2 , wherein:
the physical broadcast channel comprises a partial physical cell identifier, and the physical cell identifier is determined based at least in part on the partial physical cell identifier and the virtual cell identifier.

4 . The UE of claim 2 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive, from an anchor cell, a set of physical cell identifiers corresponding to one or more cells associated with the anchor cell.

5 . The UE of claim 4 , wherein the virtual cell identifier comprises a second index, and the second index indicates the physical cell identifier in the set of physical cell identifiers.

6 . The UE of claim 4 , wherein:
the set of physical cell identifiers corresponding to the one or more cells are divided into a plurality of subgroups, and the virtual cell identifier indicates a subgroup associated with the physical cell identifier.

7 . The UE of claim 2 , wherein the physical cell identifier is mapped to a first network identifier and a second network identifier, and the virtual cell identifier comprises the first network identifier or the second network identifier.

8 . The UE of claim 2 , wherein the virtual cell identifier corresponds to a set of most significant bits of the physical cell identifier or a set of least significant bits of the physical cell identifier.

9 . The UE of claim 2 , wherein a sequence associated with the synchronization signal is based at least in part on the virtual cell identifier and the discovery signal identifier.

10 . The UE of claim 2 , wherein the virtual cell identifier and the discovery signal identifier are mapped to a first network identifier and a second network identifier associated with the synchronization signal.

11 . The UE of claim 2 , wherein a demodulation reference signal scrambling seed associated with the physical broadcast channel is based at least in part on the virtual cell identifier or the discovery signal identifier.

12 . The UE of claim 1 , wherein the physical broadcast channel comprises a physical cell identifier.

13 . The UE of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive, from an anchor cell, an indication of an offset, an uplink wake up signal length, and a synchronization signal length, wherein the resources of the cell are based at least in part on the offset, the uplink wake up signal length, and the synchronization signal length.

14 . The UE of claim 1 , wherein the burst of synchronization signals are time division multiplexed based at least in part on a time gap, frequency division multiplexed based at least in part on a frequency offset, or both.

15 . The UE of claim 14 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive, from an anchor cell, an indication of the time gap, the frequency offset, or both.

16 . The UE of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive, from an anchor cell, an indication of a packing pattern associated with the burst of synchronization signals, wherein receiving the synchronization signal for the cell is based at least in part on the packing pattern.

17 . The UE of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
transmit a second wake up signal via second resources of the cell that are determined based at least in part on the discovery signal identifier, wherein a transmit power associated with the second wake up signal is based at least in part on the second wake up signal being a retransmission of the wake up signal.

18 . The UE of claim 1 , wherein the wake up signal comprises a single signal.

19 . The UE of claim 1 , wherein the wake up signal comprises a plurality of signals.

20 . The UE of claim 1 , wherein data associated with the physical broadcast channel is based at least in part on the wake up signal.

21 . The UE of claim 1 , wherein the wake up signal comprises an indication of a mobility state at the UE.

22 . The UE of claim 1 , wherein, to receive the physical broadcast channel, the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive the physical broadcast channel via one or more transmit beams at a network node associated with the cell, wherein at least one of the one or more transmit beams are quasi collocated with the synchronization signal.

23 . A network node, comprising:
one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network node to:
output a synchronization signal for a cell, wherein the synchronization signal comprises a discovery signal identifier corresponding to an index of the synchronization signal within a burst of synchronization signals;
obtain a wake up signal via resources of the cell that are determined based at least in part on the discovery signal identifier; and
output a physical broadcast channel of the cell based at least in part on obtaining the wake up signal.

24 . The network node of claim 23 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the network node to:
output, via the synchronization signal for the cell, a virtual cell identifier of the cell, wherein the virtual cell identifier is associated with a physical cell identifier of the cell.

25 . The network node of claim 23 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the network node to:
obtain, from an anchor cell, an indication of an offset, an uplink wake up signal length, and a synchronization signal length, wherein the resources of the cell are based at least in part on the offset, the uplink wake up signal length, and the synchronization signal length.

26 . The network node of claim 23 , wherein the one or more processors are individually or

Assignees

• Qualcomm Inc

Inventors

• Luo Jianghong
• Ryu Jae Ho
• Abedini Navid

Classifications

• Y02D30/70

  in wireless communication networks · CPC title

• H04W56/001

  Synchronization between nodes · CPC title

• H04W48/10

  using broadcasted information · CPC title

• H04W48/16

  Discovering, processing access restriction or access information · CPC title

• H04W48/14

  using user query {or user detection} · CPC title