US-12628098-B2 - Techniques for communicating synchronization signals

US12628098B2US 12628098 B2US12628098 B2US 12628098B2US-12628098-B2

Abstract

Methods, systems, and devices for wireless communications are described. A network entity may transmit a set of spatially multiplexed synchronization signals in a same symbol period. The set of spatially multiplexed synchronization signals may indicate a parameter, such as a cell identifier, for the network entity. The network entity may select a sequence for each synchronization signal of the set. A user equipment (UE) may monitor for the set of spatially multiplexed synchronization signals during the same symbol period. The UE may differentiate each synchronization signal based on a respective sequence used to transmit each synchronization signal. The UE may determine that the set of spatially multiplexed synchronization signals were transmitted by the network entity using multiple antenna ports. The UE may determine the parameter for the network entity based on receiving the set of spatially multiplexed synchronization signals.

Inventors

Yi Huang
Hung Dinh Ly
Peter Gaal
Jing Jiang
Yu Zhang
Lei Xiao
Yongle WU

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260512
Application Date: 20220922

Claims (20)

1 . An apparatus for wireless communication at a user equipment (UE), comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: monitor, during a symbol period, a plurality of frequency resources for a set of spatially multiplexed synchronization signals, the set of spatially multiplexed synchronization signals associated with a plurality of antenna ports; receive, during the symbol period, the set of spatially multiplexed synchronization signals, wherein the set of spatially multiplexed synchronization signals indicates a parameter, wherein the set of spatially multiplexed synchronization signals comprises (1) a synchronization signal associated with a first sequence and a first antenna port of the plurality of antenna ports and a synchronization signal associated with a second sequence different from the first sequence and a second antenna port of the plurality of antenna ports, the second synchronization signal associated with a second sequence different from the first sequence and a second antenna port of the plurality of antenna ports, or (2) a first synchronization signal spatially multiplexed with a second synchronization signal; and transmit, to a network entity, a first message based at least in part on the parameter.
2 . The apparatus of claim 1 , wherein the spatially multiplexed first synchronization signal comprising a first primary synchronization signal associated with a first antenna port of the plurality of antenna ports and the second synchronization signal comprising a second primary synchronization signal associated with a second antenna port of the plurality of antenna ports.
3 . The apparatus of claim 1 , the spatially multiplexed first synchronization signal comprising a first secondary synchronization signal associated with a first antenna port of the plurality of antenna ports and the second synchronization signal comprising a second secondary synchronization signal associated with a second antenna port of the plurality of antenna ports.
4 . The apparatus of claim 1 , the spatially multiplexed first synchronization signal comprising a primary synchronization signal associated with a first antenna port of the plurality of antenna ports and the second synchronization signal comprising a secondary synchronization signal associated with a second antenna port of the plurality of antenna ports.
5 . The apparatus of claim 1 , wherein the instructions to receive the set of spatially multiplexed synchronization signals are further executable by the processor to cause the apparatus to: receive, during the symbol period, a first primary synchronization signal associated with a first antenna port of the plurality of antenna ports, a second primary synchronization signal associated with a second antenna port of the plurality of antenna ports, a first secondary synchronization signal associated with a third antenna port of the plurality of antenna ports, and a second secondary synchronization signal associated with a fourth antenna port of the plurality of antenna ports.
6 . The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to: measure a first synchronization signal of the set of spatially multiplexed synchronization signals via first antenna port of the plurality of antenna ports and a second synchronization signal of the set of spatially multiplexed synchronization signals via a second antenna port of the plurality of antenna ports.
7 . The apparatus of claim 6 , wherein the instructions are further executable by the processor to cause the apparatus to: select a first beam from a plurality of beams based at least in part on measuring the first synchronization signal via the first antenna port and measuring the second synchronization signal via the second antenna port; and transmit, to the network entity, a random access message using a first random access occasion of a plurality of different random access occasions, the first random access occasion associated with the first beam.
8 . The apparatus of claim 1 , wherein: each antenna port is associated with one or more antennas.
9 . The apparatus of claim 1 , wherein the symbol period comprises an orthogonal frequency-division multiplexing symbol period.
10 . The apparatus of claim 1 , wherein the parameter comprises a cell identifier for the network entity.
11 . An apparatus for wireless communication at a network entity, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: transmit a first synchronization signal to a user equipment (UE) during a symbol period using a first antenna port; transmit a second synchronization signal to the UE during the symbol period using a second antenna port, wherein the second synchronization signal is spatially multiplexed with the first synchronization signal; transmit a third synchronization signal to the UE during the symbol period using a third antenna port; and transmit a fourth synchronization signal to the UE during the symbol period using a fourth antenna port; and receive, from the UE, a first message based at least in part on a parameter indicated by the first synchronization signal and the second synchronization signal; wherein the first synchronization signal is a first primary synchronization signal, the second synchronization signal is a second primary synchronization signal, the third synchronization signal is a first secondary synchronization signal, and the fourth synchronization signal is a second secondary synchronization signal, and the first synchronization signal, the second synchronization signal, the third synchronization signal, and the fourth synchronization signal are spatially multiplexed.
12 . The apparatus of claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to: transmit the first synchronization signal during the symbol period using the first antenna port further comprises transmitting the first synchronization signal using a first sequence; and transmit the second synchronization signal during the symbol period using the second antenna port further comprises transmitting the second synchronization signal using a second sequence.
13 . The apparatus of claim 11 , wherein: transmitting the first synchronization signal during the symbol period using the first antenna port further comprises transmitting a first primary synchronization signal; and transmitting the second synchronization signal during the symbol period using the second antenna port further comprises transmitting a second primary synchronization signal.
14 . The apparatus of claim 11 , wherein: transmitting the first synchronization signal during the symbol period using the first antenna port further comprises transmitting a first secondary synchronization signal; and transmitting the second synchronization signal during the symbol period using the second antenna port further comprises transmitting a second secondary synchronization signal.
15 . The apparatus of claim 11 , wherein: transmitting the first synchronization signal during the symbol period using the first antenna port further comprises transmitting a primary synchronization signal; and transmitting the second synchronization signal during the symbol period using the second antenna port further comprises transmitting a secondary synchronization signal.
16 . The apparatus of claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to: receive, from the UE, a random access message using a first random access occasion of a plurality of different random access occasions, the first random access occasion associated with a first beam.
17 . The apparatus of claim 16 , wherein the instructions are further executable by the processor to cause the apparatus to: select the first beam for subsequent communications with the UE based at least in part on receiving, from the UE, the random access message using the first random access occasion.
18 . The apparatus of claim 11 , wherein: each antenna port is associated with one or more antennas.
19 . The apparatus of claim 11 , wherein the symbol period comprises an orthogonal frequency-division multiplexing symbol period.
20 . The apparatus of claim 11 , wherein the parameter comprises a cell identifier for the network entity.

Description

FIELD OF TECHNOLOGY The following relates to wireless communications, including techniques for communicating synchronization signals. BACKGROUND Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE). Some wireless communications systems may support network devices equipped with multiple antenna ports (e.g., antenna arrays, antenna panels). For example, a network entity may include multiple antenna ports which may utilized for communicating multiple streams of information. In some cases, network devices may perform spatial multiplexing, which may include concurrently communicating information (e.g., different information) via multiple antenna ports. Additionally, or alternatively, some wireless communication systems may support synchronization signaling between network devices. For example, a network entity may periodically transmit one or more synchronization signals for synchronizing time-frequency resources with UEs. In some cases, network devices may communicate synchronization signaling according to one or more protocols for communications, which may specify communication techniques and time-frequency resource utilization patterns (e.g., frame structures) for synchronization signals. SUMMARY The described techniques relate to improved methods, systems, devices, and apparatuses that support techniques for communicating synchronization signals. For example, the described techniques provide for a network entity to transmit a set of spatially multiplexed synchronization signals during a symbol period. The set of spatially multiplexed synchronization signals may include any combination of one or more primary synchronization signals, one or more secondary synchronization signals, or both. The set of spatially multiplexed synchronization signals may be transmitted using two or more antenna ports (e.g., of the network entity). In some cases, the set of spatially multiplexed synchronization signals may be received by a user equipment (UE) using two or more antenna ports (e.g., of the UE). The UE may monitor for the set of spatially multiplexed synchronization signals during the symbol period. In some cases, the set of spatially multiplexed synchronization signals may indicate a parameter (e.g., one or more values used to determine a cell identifier). Additionally, or alternatively, the UE and the network entity may communicate signaling based on the set of spatially multiplexed synchronization signals (e.g., based on the parameter). For example, the UE and the network entity may select one or more beams based on the set of synchronization signals. A method for wireless communication at a user equipment (UE) is described. The method may include monitoring, during a symbol period, a set of multiple frequency resources for a set of spatially multiplexed synchronization signals, the set of spatially multiplexed synchronization signals associated with a set of multiple antenna ports, receiving, during the symbol period, the set of spatially multiplexed synchronization signals, where the set of spatially multiplexed synchronization signals indicates a parameter, and transmitting, to a network entity, a first message based on the parameter. An apparatus for wireless communication at a UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to monitor, during a symbol period, a set of multiple frequency resources for a set of spatially multiplexed synchronization signals, the set of spatially multiplexed synchronization signals associated with a set of multiple antenna ports, receive, during the symbol period, the set of spatially multiplexed synchronization signals, where the set of spatially multiplexed synchronization signals indicates a parameter, and transmit, to a network entity, a first message based on the parameter. Another apparatus for wireless communication at a UE is d