WO2025208317A1

WO2025208317A1 - Super dual link communication

Info

Publication number: WO2025208317A1
Application number: PCT/CN2024/085441
Authority: WO
Inventors: Youjun HU; Bo Dai; Mengzhu CHEN; Kun Liu; Luanjian BIAN; Jun Xu; Qiujin GUO; Xiaoying Ma
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2024-04-02
Filing date: 2024-04-02
Publication date: 2025-10-09
Anticipated expiration: 2026-10-02

Abstract

Systems, methods, and apparatus for wireless communication are described. The methods, among other benefits, reduce power consumption and improve uplink (UL) coverage. An example method includes receiving, by a wireless device, a downlink (DL) signal or a configuration. The method further includes performing, by the wireless device and based on the DL signal or the configuration, an operation. In some embodiments, the DL signal includes a low power wake-up signal (LP-WUS). In some embodiments, performing the operation includes performing a random access channel (RACH) procedure, a small data transmission (SDT), a paging monitoring, or a measurement.

Description

SUPER DUAL LINK COMMUNICATION

TECHNICAL FIELD

This patent document is directed generally to wireless communications.

BACKGROUND

Mobile telecommunication technologies are moving the world toward an increasingly connected and networked society. In comparison with the existing wireless networks, next-generation systems and wireless communication techniques will need to support a much wider range of use-case characteristics and provide a more complex and sophisticated range of access requirements and flexibilities.

Long-Term Evolution (LTE) is a standard for wireless communication for mobile devices and data terminals developed by 3rd Generation Partnership Project (3GPP) . LTE Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The 5th generation of wireless system, known as 5G, and the 6th generation of wireless system, known as 6G, advance the LTE and LTE-A wireless standards and are committed to supporting higher data rates, large number of connections, ultra-low latency, high reliability, and other emerging business needs.

SUMMARY

The present patent document discloses super dual link wireless communication methods. The disclosed methods cover downlink (DL) signal triggering of channels, such as a physical random access channel (PRACH) , a paging monitoring, or a small data transmission. The disclosed methods also include measurements based on the dual links. The disclosed methods, among other benefits, reduce power consumption and improve uplink (UL) coverage.

An example wireless communication method includes receiving, by a wireless device, a downlink (DL) signal or a configuration. The method further includes performing, by the wireless device and based on the DL signal or the configuration, an operation.

Note that where the patent document discloses a method of transmitting an information by a first device to a second device, it will be understood that a method of receiving the information by the second device from the first device is also disclosed. Similarly, where a method of receiving a message by a first device from a second device is disclosed, it will be understood that the message is transmitted by the second device to the first device.

In some embodiments, a first device includes a user equipment (UE) , a device, a user device, a terminal device, an artificial intelligence of things (A-IoT) /Internet of things (IoT) device, a phone, a pad, an augmented reality terminal, a virtual reality Device, an ultra-mobile personal computer, or a personal digital assistant. In some embodiments, a second device includes an eNodeB (evolution nodeB) , a gNB (generation nodeB) , a TRP (transmission and reception point) , a TP (transmission point) , a relay, a repeater, a base station (BS) , a reader, or the first device.

In yet another example embodiment, a device that is configured or operable to perform the above-described methods is disclosed. The device includes at least one processor configured to implement the above-described methods.

In yet another example embodiment, the above-described methods are embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium. The code included in the computer readable storage medium when executed by a processor, causes the processor to implement the methods described in this patent document.

The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example main-radio (MR) link.

FIG. 2 illustrates an example supplementary uplink (SUL) .

FIG. 3 illustrates an example receiver architecture of a wake-up receiver (WUR) .

FIG. 4 illustrates an example random access channel (RACH) occasion (RO) triggering.

FIG. 5 illustrates an example paging occasion (PO) triggering or RO triggering.

FIG. 6 illustrates an example uplink triggering.

FIG. 7 illustrates an example uplink triggering based on a user equipment (UE) identifier (ID) .

FIG. 8 illustrates an example physical uplink shared channel (PUSCH) or physical random access channel (PRACH) transmission.

FIG. 9 illustrates an example small data transmission (SDT) .

FIG. 10 illustrates an example SDT where a UE determines to receive and/or transmit. FIG. 11 illustrates an example uplink (UL) SDT.

FIG. 12 illustrates an example RACH associated with a low power synchronization signal (LP-SS) /low power wake-up signal (LP-WUS) .

FIG. 13 illustrates an example dual link for measurements.

FIG. 14 illustrates example dual link measurement thresholds.

FIG. 15 is an example flowchart for performing an operation based on a DL signal.

FIG. 16 illustrates an example block diagram of a hardware platform that may be a part of a network device or a wireless device.

FIG. 17 illustrates example wireless communication including a Base Station (BS) and User Equipments (UEs) based on some implementations of the disclosed technology.

DETAILED DESCRIPTION

The example headings for the various sections below are used to facilitate the understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Accordingly, one or more features of one example section can be combined with one or more features of another example section. Furthermore, 5G and 6G terminology is used for the sake of clarity of explanation, but the techniques disclosed in the present document are not limited to 5G and 6G technology only and may be used in wireless systems that implemented other protocols, e.g., ambient-IoT.

I. Introduction

The present patent document discloses methods of dual link wireless communication. The disclosed methods, among other benefits, reduce power consumption and improve uplink (UL) coverage.

Low power wake-up signal (LP-WUS) is introduced in Rel-19. With this, the power saving gain could be achieved. However, the receiver for receiving LP-WUS is only for downlink (DL) .

Supplementary uplink (SUL) is introduced in new radio (NR) . With this, the uplink coverage could be improved when starting the random access channel (RACH) based on the SUL. However, it is only used for uplink.

In this patent document, we would combine both DL LP-WUS and uplink (UL) SUL, and extend the function to achieve DL power saving gain, better UL coverage, and small amount data transmission.

The key character is that the main-radio (MR) link and the low power (LP) receive/transmit (R/T) link may be different. And the LP R/T link could be used for UL and DL transmission, could be used for time division duplex (TDD) and/or frequency division duplex (FDD) . FIG. 1 illustrates an example main-radio (MR) link. FIG. 2 illustrates an example supplementary uplink (SUL) . FIG. 3 illustrates an example receiver architecture of a wake-up receiver (WUR) .

Dual-link, link 1, and link 2 are assumed for communication.

Embodiment 1: DL signal triggers physical random access channel (PRACH) .

Embodiment 2: DL signal triggers RACH in uplinks or UL bands and corresponding indication.

Embodiment 3: DL signal triggers small data transmission.

Embodiment 4: association between DL signal and PRACH.

Embodiment 5: measurement based on dual-links.

The DL signal could be low power synchronization signal (LP-SS) /LP-WUS.

II. Embodiment 1

Embodiment 1 describes how DL signal triggers PRACH.

Implementation 1: DL signal including LP-WUS or a configuration triggers 4-step RACH or 2-step RACH.

Configuration indicates the UE to start 4-step RACH or 2-step RACH. The configuration is included in LP-WUS, system information block 1 (SIB1) , or high layer configuration.

The configuration includes a high layer configuration, a system information indication, RRC configuration, or predetermined configuration. The DL signal also includes a preamble of the DL signal.

Configuration indicates the UE to start RACH by using the configured PRACH resources. The PRACH resources are configured in LP-WUS or SIB1. The PRACH resources could be used for 4-step RACH or 2-step RACH.

The DL signal can include a first DL signal and a second DL signal. ‘the first DL signal and the second DL signal are associated with a same occasion’ means an occasion is associated with a first DL signal and a second DL signal.

UE start the 4-step RACH or 2-step RACH according to the configuration or the DL signal.

Implementation 2: How to trigger RACH

An occasion includes at least one of a physical random access channel (PRACH) occasion, a physical uplink shared channel (PUSCH) occasion, a paging occasion (PO) , or an uplink (UL) transmission occasion.

If UE received LP-WUS, the UE starts the RACH based on the next RACH occasion (RO) .

If UE received LP-WUS, the UE starts the RACH based on the next RO after an offset.

If the UE received LP-WUS, the UE starts RACH based on the RO associated with LP-WUS/LP-SS/synchronization signal block (SSB) .

The LP-WUS is configured in SIB and used for RACH triggering.

The LP-WUS indicates whether UE starts the RACH, or LP-WUS indicates which RO is for starting RACH.

The cyclic redundancy check (CRC) or scrambling information of LP-WUS indicates it is for RACH triggering.

The preambles of LP-WUS indicates it is for RACH triggering.

Implementation 2 is shown in FIG. 4.

After LP-WUS triggering PRACH, the corresponding UE behavior includes:

- The UE initiates RACH procedure after an offset.

- The UE initiates RACH procedure after LP-WUS.

- The UE is expected to initiate the RACH procedure in a time period, where the time period is after LP-WUS or after an offset.

- Whether the UE initiates RACH procedure depends on UE implementation.

Implementation 3: Trigger RACH or paging

SIB configuration, LP-WUS indication, CRC, scrambling, or preambles of LP-WUS indicates LP-WUS is used for RACH triggering or paging occasion (PO) monitoring.

In some embodiments, paging occasion can be used interchangeably with paging message, paging PDCCH, paging channel, paging PDSCH, or paging.

POs are located in band/carrier/frequency location x, and ROs are located in band/carrier/frequency location y. POs and ROs are defined in one cell.

Implementation 2 is shown in FIG. 5.

After LP-WUS is received, the corresponding UE behavior for monitoring PO includes:

- The UE monitors PO after an offset/a (minimum) time gap.

- The UE monitors PO after LP-WUS.

- The UE is expected to monitor PO in a time period, where the time period is after LP-WUS or after an offset.

- Whether the UE monitors PO depends on UE implementation.

Implementation 4: other configurations for PRACH

The following configurations are included in SIB.

- A preamble index, a preamble subcarrier spacing (SCS) , P_PRACH, _target, a corresponding random access radio network temporary identifier (RA-RNTI) , a PRACH resource for the cell.

- A number ofpreamble repetitions for the PRACH transmission if the UE would transmit the PRACH with repetitions.

- PRACH format, bandwidth, length.

The LP-WUS configurations are included in SIB.

For a group of UEs, it is configured with at least a preamble index, a preamble SCS, P_PRACH, _target, a corresponding RA-RNTI, a PRACH resource, a number ofpreamble repetitions or a set of preamble index, SCSs, RA-RNTI, PRACH resources, repetitions. And then, LP-WUS may indicate one of them for a target UE.

Implementation 5: DL signal, e.g., LP-WUS information.

If the UE obtain a temporary identifier (ID) or the UE is configured with an ID, then the UE ID information could be included in the DL signal, e.g., based on grouping method.

III. Embodiment 2

Embodiment 2 describes how DL signal triggers RACH in uplink or UL bands and corresponding indication. FIG. 6 illustrates an example uplink triggering.

DL signal, e.g., LP-WUS indicates the uplink or UL bands for RACH transmission.

Implementation 1:

Example 1-1: 1 bit in DL signal, e.g., LP-WUS, e.g., UL/SUL indicator.

1 bit in LP-WUS to indicate the PRACH is transmitted in band 1/UL1/bandwidth part 1 (BWP1) /frequency location1 or band2/UL2/BWP2/frequency location2.

or

Example 1-2: 1 or several bits in SIBs to indicate the frequency location for LP-WUS and SUL.

For example, there are at least one band /UL/BWP/frequency location for LP-WUS and SUL transmission.

Frequency location index 1

- DL: {starting frequency location

Bandwidth or number of physical resource blocks (PRBs)

SCS}

- UL: {starting frequency location

Bandwidth or number of PRBs

SCS}

Frequency location index 2

- DL: {starting frequency location

Bandwidth or number of PRBs

SCS}

- UL: {starting frequency location

Bandwidth or number of PRBs

SCS}

SIB can enable a frequency location index. Based on this, the LP-WUS located in the frequency location could be monitored and PRACH can be transmitted.

SIB can configure s set of indexes of frequency location. Based on this, the UE could monitor LP-WUS or transmit the PRACH in one frequency location associated with an index based on its own UE-ID. Example 1-2 is shown in FIG. 7.

In 2-step RACH, PRACH is a part of msgA. In 4-step RACH, PRACH is the msg1.

Example 1-3: Physical uplink shared channel (PUSCH) transmission.

PUSCH Location is the same as PRACH

- The PUSCH transmission, e.g., msgA PUSCH part or msg3, is assumed that the frequency location index is the same as PRACH, LP-WUS.

- The PUSCH transmission, e.g., msgA PUSCH part or msg3, is assumed that the center frequency is the same as PRACH, LP-WUS.

PUSCH Location is different from PRACH

This may depend on the configuration for PRACH and PUSCH. For example, they may be configured with different frequency parameters and independent. Then their locations could be different. Example 1-3 is shown in FIG. 8.

IV. Embodiment 3

Embodiment 3 describes how DL signal triggers SDT.

DL signal, e.g., LP-WUS or msg4 or msg2 or msgB may be used to trigger some data transmission with extreme small size, e.g., <=1000 or 100bits.

Example 1-1: LP-WUS to trigger the small data transmission. Example 1-1 is shown in FIG. 9.

At least the following configurations are indicated by LP-SS/SIB/LP-WUS for the small data transmission.

- Periodicity, e.g., {5ms, 10ms, 20ms, 40ms, 80ms, 160ms}

- Number of bits per orthogonal frequency division multiplexing (OFDM) symbol, e.g., M= one of {1, 2, 4, 8}

- Frequency domain resources, e.g., 25RB for 15khz, 11RB for 30KHz

- Time domain resources, e.g., 1 slot , 2 slots, 7symbols, 4symbols

- Number of transmission occasions, timer, ending time

- Frequency hopping flag, e.g., 1bit

- Repetition number, 1, 2, 4, 8, 16, 32, 64

- Transport block size (TBS) index or TBS, no more than 100/1000bits.

Example 1-2: LP-WUS to trigger the small data transmission occasions, where in each occasion, UE can choose to receive data and/or also can transmit UL data. Example 1-2 is shown in FIG. 10.

In this case, gNB may need to operate in duplex mode.

At least the above configurations in example 1-1 can be indicated by LP-SS/SIB/LP-WUS for the small data transmission.

Example 1-3: preamble/PRACH trigger UL transmission, e.g., in the second link. Example 1-3 is shown in FIG. 11.

After UE sending the preamble, gNodeB (gNB) knows the UE has some UL data to transmit. By sending the configuration, via LP-WUS, or message 2 or physical downlink shared channel (PDSCH) or some specific signals or channels, the UE knows how to transmit the PUSCH.

The configuration includes at least one of the following:

- Periodicity

- Frequency domain resources, e.g., 25RB for 15khz, 11RB for 30KHz

- Time domain resources, e.g., 1 slot, 2 slots, 7 symbols, 4 symbols

- Number of transmission occasions, timer, ending time

- Frequency hopping flag, e.g., 1bit

- Repetition number, 1, 2, 4, 8, 16, 32, 64

- TBS index or TBS, no more than 100/1000bits.

- Sequences/preambles for PUSCH

- Usage, e.g., X bits

A sequence could be CRC bits, a preamble.

If the UE has not more data to be transmitted, the UE transmit the preamble for ending the UL transmission.

V. Embodiment 4

Embodiment 4 describes UE self-triggered RACH in the second link.

The RACH procedure could be triggered by DL signal, e.g., LP-WUS. The UE also could trigger the RACH by itself.

In this case, the PRACH occasion may be associated with LP-SS or LP-WUS, as shown in FIG. 12.

At least the following cases are supported:

- One LP-WUS/LP-SS mapped to one PRACH occasion.

- One LP-WUS/LP-SS mapped to multiple PRACH occasions

- Multiple LP-WUS/LP-SS mapped to one PRACH occasion.

The following configurations may be included for the RACH in this link/band:

- Number Of Preambles

- Reference signal received power (RSRP) threshold for the second link

- Root Sequence Index for PRACH

- SCS for PRACH or SCS for msg3

- Power signaling for PRACH or msg3

Some UE behavior:

Prior to initiation of the physical random access procedure, Layer 1 receives from higher layers a set of LP-SS and provides to higher layers a set of RSRP measurements.

Prior to initiation of the physical random access procedure, Layer 1 may receive from higher layers an indication or LP-WUS to perform a Type-1 random access procedure, or a Type-2 random access procedure.

Prior to initiation of the physical random access procedure, Layer 1 receives the following information from the higher layers:

- Configuration of physical random access channel (PRACH) transmission parameters (PRACH preamble format, time resources, and frequency resources for PRACH transmission) .

- LP-WUS configuration

- Parameters for determining the root sequences and their cyclic shifts in the PRACH preamble sequence set (index to logical root sequence table, cyclic shift () , and set type (unrestricted, restricted set A, or restricted set B) ) .

Physical random access procedure for a UE is triggered upon request of a PRACH transmission by higher layers or by a PDCCH order for a cell or by LP-WUS.

VI. Embodiment 5

Embodiment 5 describes dual link for measurement.

FIG. 13 illustrates an example dual link for measurements.

In some cases, UE only contain the link connected with a cluster.

In some cases, UE only contain the link connected with the gNB providing the DL signal, e.g., LP-SS/LP-WUS.

In some cases, UE contain two links connected to the cluster and the gNB providing the DL signal.

With the above, UE could keep connection with network (NW) at any time, and achieve a smooth switching between different clusters.

The following configuration may be included:

- Threshold for link1, and threshold for link2.

- Measurement period for link1, and measurement period for link2

- Reference signal (RS) resources for link1, and RS resources for link2.

The following UE behaviors may be included:

- At least one of the thresholds should be satisfied when UE perform the serving cell measurement. If both of the thresholds are not satisfied, the UE performs neighbor cell measurement, intro-frequency or inter-frequency measurement.

- The UE does not need to simultaneously do the measurements for two links.

- Whether the UE could apply the measurement based on link2 is depending on the measurement results for link1.

- The UE could choose the link for measurement based on threshold.

An example of dual link measurement thresholds is shown in FIG. 14.

The measurement based on links satisfied RSRP>thre1, then UE could use link2 for measurement. If the RSRP of link2 is less than threshold2, UE shall return to link1 measurement.

FIG. 15 is an example flowchart for performing an operation based on a DL signal. Operation 1502 includes receiving, by a wireless device, a downlink (DL) signal or a configuration. Operation 1504 includes performing, by the wireless device and based on the DL signal or the configuration, an operation. In some embodiments, the method can be implemented according to Embodiments 1-5. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.

In some embodiments, the DL signal includes at least one of a wake-up signal, a synchronization signal, a low power wake-up signal (LP-WUS) , a low power synchronization signal (LP-SS) , a synchronization signal block (SSB) , a signal with a periodicity, a signal with an on-off keying (OOK) modulation, a signal with a Manchester coding, a physical downlink control channel (PDCCH) , a physical reader device channel (PRDCH) , a payload with a cyclic redundancy check (CRC) , a scrambling information, a paging, or a sequence.

In some embodiments, the DL signal indicates the wireless device to monitor a physical downlink control channel (PDCCH) , an occasion, a paging occasion (PO) , a physical downlink shared channel (PDSCH) , a synchronization signal block (SSB) , a reference signal, or a system information block (SIB) . In some embodiments, system information block is used interchangeably with system information.

In some embodiments, the DL signal, e.g., LP-WUS could be used to trigger the PDCCH monitoring, paging monitoring, paging occasion monitoring, where the DL signal is associated with the PO. For example, LP-WUS is associated with X PO, X could be at least one of {1/16, 1/8, 1/4, 1/2, 1, 2, 4, 8, 16} . For example, X=1/4 means, 4 LP-WUS occasions correspond to one PO, or one LP-WUS corresponds to 4 POs. For example, X=2 means, one LP-WUS corresponds to 2 POs, or two LP-WUS occasions correspond to one PO. In some embodiments, “corresponding to” can be used interchangeably with “associated with. ”

In some embodiments, the DL signal, e.g., LP-WUS, is configured with a time window, a time duration, a periodicity, or an offset. The value or range of the time window, the time duration, the periodicity, or the offset is different based on different conditions. In some embodiments, the condition includes whether the eDRX is configured, whether a paging cycle is greater than a threshold or a value, or whether a parameter, e.g., ran-ExtendedPagingCycle, is configured. For example, when eDRX is configured, a paging cycle is greater than 256, or ran-ExtendedPagingCycle-r18 is configured, the greatest window length, offset, duration is greater than that when eDRX is not configured, the paging cycle is not greater than 256, or ran-ExtendedPagingCycle-r18 is not configured.

In some embodiments, the DL signal indicates the wireless device to perform a random access channel (RACH) procedure or perform an uplink (UL) transmission, where the UL transmission includes at least one of a preamble, a msg1, a msg3, a msgA, a physical uplink shared channel (PUSCH) , a PRACH, a physical device reader channel (PDRCH) , a physical uplink control channel (PUCCH) , or an UL signal or channel.

In some embodiments, the DL signal is used for a random access channel (RACH) procedure or a paging occasion (PO) monitoring.

In some embodiments, the RACH procedure includes at least one of the following: an operation where an identification (ID) information is transmitted; one or more uplink (UL) transmissions; one or more of a physical random access channel (PRACH) , a physical uplink shared channel (PUSCH) , a msg1, a mg3, or a msgA; one or more predetermined preambles; or one or more steps, transmissions, replies, or responses. In some embodiments, RACH procedure includes a procedure, e.g., access procedure, inventory procedure, which requires 1-4 steps, where the resources for the first step is dedicated, or the DL signal includes a UE-ID, a random value, a preamble/sequence or UE group ID information.

In some embodiments, the DL signal or the configuration indicates that the DL signal is used for a random access channel (RACH) procedure or a paging occasion (PO) monitoring.

In some embodiments, at least one bit in the DL signal or the configuration indicates that the wireless device performs a RACH procedure or a PO monitoring.

In some embodiments, the DL signal or the configuration indicates that an uplink (UL) transmission is transmitted in a first band, link, bandwidth part, or frequency location, or a second band, link, bandwidth part, or frequency location. In some embodiments, the frequency location is based on the starting frequency location, number of frequency resources, or based on a bitmap to indicate the frequency resources; the frequency location could be with an index or ID. The frequency resources could be RE, PRB, RB, subcarrier, REG, CCE, bandwidth, or BWP.

In some embodiments, the DL signal or the configuration indicates that a random access channel (RACH) procedure is performed in a first band, link, bandwidth part, or frequency location, or a second band, link, bandwidth part, or frequency location.

In some embodiments, the DL signal or the configuration indicates that the operation is performed in a first band, link, bandwidth part, or frequency location, or a second band, link, bandwidth part, or frequency location.

In some embodiments, one DL signal is mapped to or associated with one physical random access channel (PRACH) occasion or one uplink (UL) transmission occasion.

In some embodiments, one DL signal is mapped to or associated with multiple PRACH occasions or multiple UL transmission occasions.

In some embodiments, multiple DL signals are mapped to or associated with one PRACH occasion or one UL transmission occasion.

In some embodiments, RACH occasion can be used interchangeably with PRACH occasion.

In some embodiments, the DL signal includes a first DL signal and a second DL signal, where the first DL signal and the second DL signal are associated with an occasion.

In some embodiments, the first DL signal and the second DL signal are associated with a same occasion.

In some embodiments, the first DL signal and the second DL signal are associated with occasions that have a same slot, subframe, symbol, time duration, time window, time point, or frame index.

In some embodiments, the occasion includes at least one of a physical random access channel (PRACH) occasion, a physical uplink shared channel (PUSCH) occasion, a paging occasion (PO) , or an uplink (UL) transmission occasion.

In some embodiments, a paging occasion (PO) is located in a first band, carrier, or frequency location, and an uplink (UL) transmission or a random access channel (RACH) procedure is located in a second band, carrier, or frequency location.

In some embodiments, a PO and an UL transmission or a RACH procedure are located in a same band, carrier, or frequency location.

In some embodiments, a PO and a RACH occasion (RO) or an UL transmission occasion are defined for one cell.

In some embodiments, at least one of a random access channel (RACH) procedure or an uplink (UL) transmission is performed in a same band, carrier, bandwidth part, or frequency location as the DL signal. For example, the LP-WUS or the PRDCH and the PRACH transmission or the PDRCH are in the same band, carrier, bandwidth part, link or frequency location.

In some embodiments, at least one of a RACH procedure or an UL transmission is performed based on a same starting frequency resource, center frequency, lower edge of frequency, or upper edge of frequency as the DL signal. For example, the LP-WUS or the PRDCH and the PRACH transmission or the PDRCH have the same starting frequency resource, center frequency, lower edge of frequency, or upper edge of frequency.

In some embodiments, performing the operation includes at least one of the following: performing a physical downlink control channel (PDCCH) monitoring; performing a paging occasion (PO) monitoring; performing a physical downlink shared channel (PDSCH) transmission; performing a physical reader device channel (PRDCH) transmission; performing a sequence transmission; performing a data transmission; performing an uplink (UL) transmission; performing a random access channel (RACH) procedure; performing a physical random access channel (PRACH) transmission; performing a physical uplink shared channel (PUSCH) transmission; performing a physical device reader channel (PDRCH) transmission; or performing a measurement, a handover, a cell selection, or a cell reselection.

In some embodiments, the PRDCH is a channel for a specific device, e.g., A-IOT device. The PRDCH is transmitted from the device to the gNB or reader. And it may be transmitted with a preamble, with the OOK modulation, with the PIE or Manchester coding, or with maximum TBS no more than 1000 bits. In some embodiments, the PDRCH is a channel for a specific device, e.g., A-IOT device. The PDRCH is transmitted from the gNB or reader to the device. And it may be transmitted with a preamble, with the OOK modulation or BPSK, with the PIE or Manchester coding or miller coding, or with maximum TBS no more than 1000 bits.

In some embodiments, a configuration related to performing the RACH procedure includes at least one of the following: at least one of a preamble index, a preamble index range, or a number of preambles; a subcarrier spacing (SCS) for a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDRCH, or an UL transmission; a radio network temporary identifier (RNTI) ; a resource or an occasion for a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDRCH, a physical uplink control channel (PUCCH) , or an UL transmission; a number of repetitions for a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDRCH, a PUCCH, or an UL transmission; a format; a bandwidth; a preamble length; a low power wake-up signal (LP-WUS) configuration; a DL signal configuration; a RACH-associated or PRACH-associated signal; a band, a carrier, a center frequency, a reference frequency, or an absolute frequency; a time point, a time duration, or a time window; a beam, a physical cell, a cluster, or a virtual cell; a root sequence; or a power signaling for a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDRCH, a PUCCH, or an UL transmission.

In some embodiments, performing the RACH procedure includes performing at least one of a first RACH procedure or a second RACH procedure.

In some embodiments, the DL signal or the configuration indicates the first RACH procedure or the second RACH procedure.

In some embodiments, the DL signal or the configuration indicates to the wireless device which RACH procedure of the first and second RACH procedures to perform.

In some embodiments, performing the RACH procedure is based on at least one of the following: a next occasion for an UL transmission during the RACH procedure after the DL signal, an offset, or a timer; a next occasion for an UL transmission during the RACH procedure after an offset based on the DL signal; an occasion for an UL transmission during the RACH procedure associated with or based on the DL signal; or a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDCCH, a physical uplink control channel (PUCCH) , or an UL transmission during the RACH procedure after at least one of the DL signal, an offset, or a timer.

In some embodiments, a first transmission during the first RACH procedure and a second transmission during the second RACH procedure have a same frequency location, starting frequency resource, center frequency, lower frequency edge, upper frequency edge, band, carrier, link, frequency location, resource, or bandwidth. In some embodiments, the first transmission during the first RACH procedure includes the msg1, the second transmission during the second RACH procedure includes msgA, msg1 and msgA having a same frequency location, starting frequency resource, center frequency, lower frequency edge, upper frequency edge, band, carrier, link, frequency location, resource, or bandwidth. In some embodiments, msg1 and msgA have a same preamble index or preamble index range.

In some embodiments, a first transmission during the first RACH procedure and a second transmission during the second RACH procedure have a same occasion, slot, subframe, symbol, time duration, time window, time point, or frame index. For example, msg1 and msgA are associated with a same occasion. They could be transmitted in the same slot/subframe/symbol/time duration/time window/frame, or at the same time point.

In some embodiments, a first transmission during the first RACH procedure and a second transmission during the second RACH procedure have a same association with the DL signal.

In some embodiments, a first transmission during the first RACH procedure and a second transmission during the second RACH procedure have different frequency locations, starting frequency resources, center frequencies, lower frequency edges, upper frequency edges, bands, carriers, links, frequency locations, resources, or bandwidths.

In some embodiments, a transmission includes at least one of a signal, an UL transmission, or a DL transmission during the RACH procedure, or an occasion for the RACH procedure.

In some embodiments, performing the PO monitoring includes at least one of the following: the wireless device monitors a PO after at least one of the DL signal, an offset, a minimum time gap, a timer, or a reference time; the wireless device monitors a PO within a time period, a time duration, or a time window, where the time period, the time duration, or the time window is after the DL signal, after an offset, or a timer; or a location of performing the PO monitoring is determined by at least one of the DL signal or the configuration.

In some embodiments, for performing the UL transmission, at least one of the following applies: a first UL transmission has a same frequency location, starting frequency resource, center frequency, lower frequency edge, upper frequency edge, band, carrier, frequency location, or bandwidth part as a second UL transmission or the DL signal; a first UL transmission and a second UL transmission are configured with different parameters of a frequency resource; a first UL transmission and a second UL transmission are performed during a same RACH procedure; a first UL transmission and a second UL transmission are included in one UL transmission; or a first UL transmission is included in a first RACH procedure, and a second UL transmission is included in a second RACH procedure.

In some embodiments, the first UL transmission is the first UL message, the first PDRCH, or msg1, the second UL transmission is the second UL message, the second PDRCH, or msg3, and they have a same frequency location, starting frequency resource, center frequency, lower frequency edge, upper frequency edge, band, carrier, frequency location, or bandwidth part.

In some embodiments, for performing the data transmission, the DL signal or the configuration indicates at least one of the following: a periodicity; a number of bits per orthogonal frequency division multiplexing (OFDM) symbol; a number of on-off keying (OOK) symbols or chips per OFDM symbol; a frequency domain resource; a time domain resource; a number of transmission occasions; a timer; an ending time; a starting time; a frequency hopping flag; a repetition number; a transport block size (TBS) index; a TBS; a coding rate; an offset; a sequence or a preamble for a PUSCH transmission; or a usage. In some embodiments, the time resources are based on symbols, slots, subframes, frames/SFN, hyper-frame, ms, us, time unit, where the symbols include one of OFDM symbols, OOK chips, OOK symbols, modulated/modulation symbols, complex-valued symbols, binary-valued symbols, or 0-1 valued symbols. In some embodiments, the frequency resources are based on RE, PRB, RB, subcarrier, REG, CCE, bandwidth, BWP, band, carrier, or the starting location of frequency.

In some embodiments, for performing the measurement, the handover, the cell selection, or the cell reselection, the configuration includes at least one of the following: a first threshold for a first link or signal; a second threshold for a second link or signal; a measurement period for the first link or signal; a measurement period for the second link or signal; a reference signal (RS) resource for the first link or signal; or a RS resource for the second link or signal.

In some embodiments, at least one of the first threshold or the second threshold is satisfied when the wireless device performs the measurement, the handover, the cell selection, or the cell reselection.

In some embodiments, if neither of the first threshold or the second threshold is satisfied, the wireless device performs at least one of a neighbor cell measurement, an intro-frequency measurement, or an inter-frequency measurement based on the second link or signal.

In some embodiments, the wireless device does not perform the measurement, the handover, the cell selection, or the cell reselection based on the first link or signal and the second link or signal simultaneously.

In some embodiments, the wireless device prioritizes to perform the measurement, the handover, the cell selection, or the cell reselection based on the first link or signal.

In some embodiments, the wireless device performs a measurement on the first link or signal based on a measurement result of the second link or signal.

In some embodiments, the wireless device performs a measurement on the second link or signal based on a measurement result of the first link or signal.

In some embodiments, the wireless device determines which link or signal of the first link or signal and the second link or signal to measure based on the first threshold and the second threshold.

In some embodiments, the first signal includes at least one of a wake-up signal, a synchronization signal, a signal with a periodicity, a signal with an on-off keying (OOK) modulation, or a sequence.

In some embodiments, the second signal includes at least one of a primary synchronization signal (PSS) , a secondary synchronization signal (SSS) , a synchronization signal block (SSB) , a channel state information (CSI) reference signal (CSI-RS) , a positioning reference signal (PRS) , a reference signal (RS) , or a signal with an orthogonal frequency-division multiplexing (OFDM) modulation.

In some embodiments, the first signal or the second signal is included in the DL signal.

In some embodiments, the first signal and the second signal have a same cell identifier (ID) , the first signal and the second signal are associated with a same cell identifier (ID) , or the first signal and the second signal are transmitted in the same cell, cluster, or virtual cell.

In some embodiments, the first signal and the second signal include a same cluster or virtual cell, or the first signal and the second signal are associated with or transmitted in a same cluster or virtual cell.

In some embodiments, the first signal and the second signal are overlapped or partially overlapped in a time domain.

In some embodiments, the first link or signal has a lower frequency, and the second link or signal has a higher frequency. In some embodiments, the first link or signal has a higher frequency, and the second link or signal has a lower frequency.

In some embodiments, the first link is a band, carrier, bandwidth part, bandwidth, or frequency location where a first signal transmits/receive.

In some embodiments, the second link is a band, carrier, bandwidth part, bandwidth, or frequency location where a second signal transmits/receive.

FIG. 16 shows an example block diagram of a hardware platform 1600 that may be a part of a network device (e.g., a base station (BS) , a transmission and reception point (TRP) , or a radio access network (RAN) ) or a wireless device (e.g., a user equipment (UE) ) . The hardware platform 1600 includes at least one processor 1610 and a memory 1605 having instructions stored thereupon. The instructions upon execution by the processor 1610 configure the hardware platform 1600 to perform the operations described in FIGS. 1-15 and in the various embodiments described in this patent document. The transmitter 1615 transmits or sends information or data to another device. For example, a network device transmitter can send a message to a user equipment. The receiver 1620 receives information or data transmitted or sent by another device. For example, a user equipment can receive a message from a network device. For example, a UE, a wireless device, or a network device, as described in the present document, may be implemented using the hardware platform 1600.

The implementations as discussed above will apply to a wireless communication. FIG. 17 shows an example of a wireless communication system (e.g., a 6G, 5G, or NR cellular network) that includes a base station 1720 and one or more user equipment (UE) 1711, 1712, and 1713. In some embodiments, the UEs access the BS (e.g., the network) using a communication link to the network (sometimes called uplink direction, as depicted by dashed arrows 1731, 1732, 1733) , which then enables subsequent communication (e.g., shown in the direction from the network to the UEs, sometimes called downlink direction, shown by arrows 1741, 1742, 1743) from the BS to the UEs. In some embodiments, the BS sends information to the UEs (sometimes called downlink direction, as depicted by arrows 1741, 1742, 1743) , which then enables subsequent communication (e.g., shown in the direction from the UEs to the BS, sometimes called uplink direction, shown by dashed arrows 1731, 1732, 1733) from the UEs to the BS. The UE may be, for example, a smartphone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, and so on. The UEs described in the present document may be communicatively coupled to the base station 1720 depicted in FIG. 17.

It will be appreciated by one of skill in the art that the present patent document discloses methods that, among other benefits, reduce downlink (DL) power consumption and improve uplink (UL) coverage. The methods disclosed include triggering channels, such as a physical random access channel (PRACH) , a small data transmission, or a measurement with a downlink (DL) signal.

Some of the embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product, embodied in a computer-readable medium, including computer-executable instructions, such as program code, executed by computers in networked environments. A computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM) , Random Access Memory (RAM) , compact discs (CDs) , digital versatile discs (DVD) , etc. Therefore, the computer-readable media can include a non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.

Some of the disclosed embodiments can be implemented as devices or modules using hardware circuits, software, or combinations thereof. For example, a hardware circuit implementation can include discrete analog and/or digital components that are, for example, integrated as part of a printed circuit board. Alternatively, or additionally, the disclosed components or modules can be implemented as an Application Specific Integrated Circuit (ASIC) and/or as a Field Programmable Gate Array (FPGA) device. Some implementations may additionally or alternatively include a digital signal processor (DSP) that is a specialized microprocessor with an architecture optimized for the operational needs of digital signal processing associated with the disclosed functionalities of this application. Similarly, the various components or sub-components within each module may be implemented in software, hardware, or firmware. The connectivity between the modules and/or components within the modules may be provided using any one of the connectivity methods and media that is known in the art, including, but not limited to, communications over the Internet, wired, or wireless networks using the appropriate protocols.

While this document contains many specifics, these should not be construed as limitations on the scope of an invention that is claimed or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features that are described in this document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or a variation of a sub-combination. Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.

Only a few implementations and examples are described, and other implementations, enhancements and variations can be made based on what is described and illustrated in this patent document.

Claims

A method of wireless communication, comprising:

receiving, by a wireless device, a downlink (DL) signal or a configuration; and

performing, by the wireless device and based on the DL signal or the configuration, an operation.
The method of claim 1, wherein the DL signal comprises at least one of a wake-up signal, a synchronization signal, a low power wake-up signal (LP-WUS) , a low power synchronization signal (LP-SS) , a synchronization signal block (SSB) , a signal with a periodicity, a signal with an on-off keying (OOK) modulation, a signal with a Manchester coding, a physical downlink control channel (PDCCH) , a physical reader device channel (PRDCH) , a payload with a cyclic redundancy check (CRC) , a scrambling information, a paging, or a sequence.
The method of claim 1 or 2, wherein at least one of the following applies:

the DL signal indicates the wireless device to monitor a physical downlink control channel (PDCCH) , an occasion, a paging occasion (PO) , a physical downlink shared channel (PDSCH) , a synchronization signal block (SSB) , a reference signal, or a system information block (SIB) ; or

the DL signal indicates the wireless device to perform a random access channel (RACH) procedure or perform an uplink (UL) transmission, wherein the UL transmission comprises at least one of a preamble, a msg1, a msg3, a msgA, a physical uplink shared channel (PUSCH) , a PRACH, a physical device reader channel (PDRCH) , a physical uplink control channel (PUCCH) , or an UL signal or channel.
The method of any of claims 1-3, wherein the DL signal is used for a random access channel (RACH) procedure or a paging occasion (PO) monitoring.
The method of claim 4, wherein the RACH procedure comprises at least one of the following:

an operation where an identification (ID) information is transmitted;

one or more uplink (UL) transmissions;

one or more of a physical random access channel (PRACH) , a physical uplink shared channel (PUSCH) , a msg1, a mg3, or a msgA;

one or more predetermined preambles; or

one or more steps, transmissions, replies, or responses.
The method of any of claims 1-5, wherein at least one of the following applies:

the DL signal or the configuration indicates that the DL signal is used for a random access channel (RACH) procedure or a paging occasion (PO) monitoring; or

at least one bit in the DL signal or the configuration indicates that the wireless device performs a RACH procedure or a PO monitoring.
The method of any of claims 1-6, wherein at least one of the following applies:

the DL signal or the configuration indicates that an uplink (UL) transmission is transmitted in a first band, link, bandwidth part, or frequency location, or a second band, link, bandwidth part, or frequency location;

the DL signal or the configuration indicates that a random access channel (RACH) procedure is performed in a first band, link, bandwidth part, or frequency location, or a second band, link, bandwidth part, or frequency location; or

the DL signal or the configuration indicates that the operation is performed in a first band, link, bandwidth part, or frequency location, or a second band, link, bandwidth part, or frequency location.
The method of any of claims 1-7, wherein at least one of the following applies:

one DL signal is mapped to or associated with one physical random access channel (PRACH) occasion or one uplink (UL) transmission occasion;

one DL signal is mapped to or associated with multiple PRACH occasions or multiple UL transmission occasions; or

multiple DL signals are mapped to or associated with one PRACH occasion or one UL transmission occasion.
The method of any of claims 1-8, wherein the DL signal comprises a first DL signal and a second DL signal, and wherein the first DL signal and the second DL signal are associated with an occasion.
The method of claim 9, wherein at least one of the following applies:

the first DL signal and the second DL signal are associated with a same occasion;

the first DL signal and the second DL signal are associated with occasions that have a same slot, subframe, symbol, time duration, time window, time point, or frame index; or

the occasion comprises at least one of a physical random access channel (PRACH) occasion, a physical uplink shared channel (PUSCH) occasion, a paging occasion (PO) , or an uplink (UL) transmission occasion.
The method of any of claims 1-10, wherein at least one of the following applies:

a paging occasion (PO) is located in a first band, carrier, or frequency location, and an uplink (UL) transmission or a random access channel (RACH) procedure is located in a second band, carrier, or frequency location;

a PO and an UL transmission or a RACH procedure are located in a same band, carrier, or frequency location; or

a PO and a RACH occasion (RO) or an UL transmission occasion are defined for one cell.
The method of any of claims 1-11, wherein at least one of the following applies:

at least one of a random access channel (RACH) procedure or an uplink (UL) transmission is performed in a same band, carrier, bandwidth part, or frequency location as the DL signal; or

at least one of a RACH procedure or an UL transmission is performed based on a same starting frequency resource, center frequency, lower edge of frequency, or upper edge of frequency as the DL signal.
The method of any of claims 1-12, wherein performing the operation comprises at least one of the following:

performing a physical downlink control channel (PDCCH) monitoring;

performing a paging occasion (PO) monitoring;

performing a physical downlink shared channel (PDSCH) transmission;

performing a physical reader device channel (PRDCH) transmission;

performing a sequence transmission;

performing a data transmission;

performing an uplink (UL) transmission;

performing a random access channel (RACH) procedure;

performing a physical random access channel (PRACH) transmission;

performing a physical uplink shared channel (PUSCH) transmission;

performing a physical device reader channel (PDRCH) transmission; or

performing a measurement, a handover, a cell selection, or a cell reselection.
The method of claim 13, wherein a configuration related to performing the RACH procedure comprises at least one of the following:

at least one of a preamble index, a preamble index range, or a number of preambles;

a subcarrier spacing (SCS) for a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDRCH, or an UL transmission;

a radio network temporary identifier (RNTI) ;

a resource or an occasion for a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDRCH, a physical uplink control channel (PUCCH) , or an UL transmission;

a number of repetitions for a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDRCH, a PUCCH, or an UL transmission;

a format;

a bandwidth;

a preamble length;

a low power wake-up signal (LP-WUS) configuration;

a DL signal configuration;

a RACH-associated or PRACH-associated signal;

a band, a carrier, a center frequency, a reference frequency, or an absolute frequency;

a time point, a time duration, or a time window;

a beam, a physical cell, a cluster, or a virtual cell;

a root sequence; or

a power signaling for a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDRCH, a PUCCH, or an UL transmission.
The method of claim 13 or 14, wherein performing the RACH procedure comprises performing at least one of a first RACH procedure or a second RACH procedure.
The method of 15, wherein at least one of the following applies:

the DL signal or the configuration indicates the first RACH procedure or the second RACH procedure; or

the DL signal or the configuration indicates to the wireless device which RACH procedure of the first and second RACH procedures to perform.
The method of any of claims 13-16, wherein performing the RACH procedure is based on at least one of the following:

a next occasion for an UL transmission during the RACH procedure after the DL signal, an offset, or a timer;

a next occasion for an UL transmission during the RACH procedure after an offset based on the DL signal;

an occasion for an UL transmission during the RACH procedure associated with or based on the DL signal; or

a preamble, a msg1, a msg3, a msgA, a PUSCH, a PRACH, a PDCCH, a physical uplink control channel (PUCCH) , or an UL transmission during the RACH procedure after at least one of the DL signal, an offset, or a timer.
The method of any of claims 15-17, wherein at least one of the following applies:

a first transmission during the first RACH procedure and a second transmission during the second RACH procedure have a same frequency location, starting frequency resource, center frequency, lower frequency edge, upper frequency edge, band, carrier, link, frequency location, resource, or bandwidth;

a first transmission during the first RACH procedure and a second transmission during the second RACH procedure have a same occasion, slot, subframe, symbol, time duration, time window, time point, or frame index;

a first transmission during the first RACH procedure and a second transmission during the second RACH procedure have a same association with the DL signal;

a first transmission during the first RACH procedure and a second transmission during the second RACH procedure have different frequency locations, starting frequency resources, center frequencies, lower frequency edges, upper frequency edges, bands, carriers, links, frequency locations, resources, or bandwidths; or

a transmission comprises at least one of a signal, an UL transmission, or a DL transmission during the RACH procedure, or an occasion for the RACH procedure.
The method of any of claims 13-18, wherein performing the PO monitoring comprises at least one of the following:

the wireless device monitors a PO after at least one of the DL signal, an offset, a minimum time gap, a timer, or a reference time;

the wireless device monitors a PO within a time period, a time duration, or a time window, wherein the time period, the time duration, or the time window is after the DL signal, after an offset, or a timer; or

a location of performing the PO monitoring is determined by at least one of the DL signal or the configuration.
The method of any of claims 13-19, wherein for performing the UL transmission, at least one of the following applies:

a first UL transmission has a same frequency location, starting frequency resource, center frequency, lower frequency edge, upper frequency edge, band, carrier, frequency location, or bandwidth part as a second UL transmission or the DL signal;

a first UL transmission and a second UL transmission are configured with different parameters of a frequency resource;

a first UL transmission and a second UL transmission are performed during a same RACH procedure;

a first UL transmission and a second UL transmission are comprised in one UL transmission; or

a first UL transmission is comprised in a first RACH procedure, and a second UL transmission is comprised in a second RACH procedure.
The method of any of claims 13-20, wherein for performing the data transmission, the DL signal or the configuration indicates at least one of the following:

a periodicity;

a number of bits per orthogonal frequency division multiplexing (OFDM) symbol;

a number of on-off keying (OOK) symbols or chips per OFDM symbol;

a frequency domain resource;

a time domain resource;

a number of transmission occasions;

a timer;

an ending time;

a starting time;

a frequency hopping flag;

a repetition number;

a transport block size (TBS) index;

a TBS;

a coding rate;

an offset;

a sequence or a preamble for a PUSCH transmission; or

a usage.
The method of any of claims 13-21, wherein for performing the measurement, the handover, the cell selection, or the cell reselection, the configuration comprises at least one of the following:

a first threshold for a first link or signal;

a second threshold for a second link or signal;

a measurement period for the first link or signal;

a measurement period for the second link or signal;

a reference signal (RS) resource for the first link or signal; or

a RS resource for the second link or signal.
The method of claim 22, wherein at least one of the first threshold or the second threshold is satisfied when the wireless device performs the measurement, the handover, the cell selection, or the cell reselection.
The method of claim 22, wherein if neither of the first threshold or the second threshold is satisfied, the wireless device performs at least one of a neighbor cell measurement, an intro-frequency measurement, or an inter-frequency measurement based on the second link or signal.
The method of claim 22, wherein at least one of the following applies:

the wireless device does not perform the measurement, the handover, the cell selection, or the cell reselection based on the first link or signal and the second link or signal simultaneously; or

the wireless device prioritizes to perform the measurement, the handover, the cell selection, or the cell reselection based on the first link or signal.
The method of claim 22, wherein at least one of the following applies:

the wireless device performs a measurement on the first link or signal based on a measurement result of the second link or signal; or

the wireless device performs a measurement on the second link or signal based on a measurement result of the first link or signal.
The method of claim 22, wherein the wireless device determines which link or signal of the first link or signal and the second link or signal to measure based on the first threshold and the second threshold.
The method of any of claims 22-27, wherein at least one of the following applies:

the first signal comprises at least one of a wake-up signal, a synchronization signal, a signal with a periodicity, a signal with an on-off keying (OOK) modulation, or a sequence;

the second signal comprises at least one of a primary synchronization signal (PSS) , a secondary synchronization signal (SSS) , a synchronization signal block (SSB) , a channel state information (CSI) reference signal (CSI-RS) , a positioning reference signal (PRS) , a reference signal (RS) , or a signal with an orthogonal frequency-division multiplexing (OFDM) modulation;

the first signal or the second signal is comprised in the DL signal;

the first signal and the second signal have a same cell identifier (ID) ;

the first signal and the second signal comprise a same cluster or virtual cell;

the first signal and the second signal are overlapped or partially overlapped in a time domain;

the first link or signal has a lower frequency, and the second link or signal has a higher frequency;

the first link is a band, carrier, bandwidth part, bandwidth, or frequency location where a first signal transmits; or

the second link is a band, carrier, bandwidth part, bandwidth, or frequency location where a second signal transmits.
An apparatus for wireless communication, comprising a processor, wherein the processor is configured to implement a method recited in any one or more of claims 1 to 28.
A computer readable program storage medium having code stored thereon, the code, when executed by a processor, causing the processor to implement a method recited in any one or more of claims 1 to 28.