Patent Description:
A UE may communicate with a base station (BS) via the downlink and uplink. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a <NUM> BS, a <NUM> Node B, and/or the like.

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless communication devices to communicate on a municipal, national, regional, and even global level. <NUM>, which may also be referred to as New radio (NR), is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). <NUM> is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to increase, there exists a need for further improvements in LTE and <NUM> technologies.

A BS may transmit a signal to a UE to indicate whether the UE should decode a subsequent communication (e.g., a downlink channel). This may improve battery efficiency of the UE because the UE may not scan for the subsequent communication unless the UE receives the signal. For example, such a signal may be termed a wakeup signal. <CIT> describes a wireless device that receives a wireless signature beacon signal and determines that the received wireless signature beacon signal matches a selected wakeup signature beacon signal. <CIT> describes sending a probe requesting for nodes with queued data to acknowledge the probe. <CIT> describes an access point that transmits a wakeup message comprising a device specific sequence to a wireless device. 3GPP discussion and decision documents <NPL> discuss a wake up signal that a UE can monitor prior to monitoring NPDCCH which informs the UE whether to monitor NPDCCH or not. <CIT> describes a design of synchronization signals for narrowband operation. <CIT> describes a method for performing a cell search in a wireless communication system.

By assigning UEs to two or more UE groups, all UEs of a UE group can be awakened using a single wakeup signal. This may be more efficient than transmitting a wakeup signal to a single UE, and may be more efficient than waking up all UEs (instead of only a group of UEs) for the subsequent communication. However, a UE may encounter difficulty when identifying the wakeup signal. Furthermore, it may be cumbersome to add additional information to the wakeup signal to indicate UEs to which the wakeup signal applies.

In some aspects, method according to claim <NUM> is provided.

In some aspects, an apparatus according to independent claim <NUM> is provided.

Further aspects are provided by the dendent claims.

It is noted that while aspects may be described herein using terminology commonly associated with <NUM> and/or <NUM> wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems, such as <NUM> and later, including <NUM> technologies.

The network <NUM> may be an LTE network or some other wireless network, such as a <NUM> network. A BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a <NUM> BS, a Node B, a gNB, a <NUM> NB, an access point, a transmit receive point (TRP), and/or the like.

A UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, etc. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.

MTC and eMTC UEs include, for example, robots, drones, remote devices, such as sensors, meters, monitors, location tags, etc., that may communicate with a base station, another device (e.g., remote device), or some other entity. In some aspects, NB-IoT and/or eMTC UEs may remain in a dormant or idle state until awakened by a wakeup signal to receive a communication, as described elsewhere herein.

<FIG> shows a block diagram <NUM> of a design of BS <NUM> and UE <NUM>, which may be one of the base stations and one of the UEs in <FIG>. BS <NUM> may be equipped with T antennas 234a through 234t, and UE <NUM> may be equipped with R antennas 252a through 252r, where in general T ≥ <NUM> and R ≥ <NUM>.

At BS <NUM>, a transmit processor <NUM> may receive data from a data source <NUM> for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS(s) selected for the UE, and provide data symbols for all UEs. Transmit processor <NUM> may also process system information (e.g., for semi-static resource partitioning information (SRPI), and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols. Transmit processor <NUM> may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS)) and synchronization signals (e.g., the primary synchronization signal (PSS), secondary synchronization signal (SSS), narrowband PSS (NPSS), narrowband SSS (NSSS), and/or the like). Transmit processor <NUM> may also generate wakeup signals for subsequent communications. According to certain aspects described in more detail below, the synchronization signals can be generated with location encoding to convey additional information.

At UE <NUM>, antennas 252a through 252r may receive the downlink signals from BS <NUM> and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. A receive (RX) processor <NUM> may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE <NUM> to a data sink <NUM>, and provide decoded control information and system information to a controller/processor <NUM>.

The symbols from transmit processor <NUM> may be precoded by a TX MIMO processor <NUM> if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like), and transmitted to BS <NUM>. At BS <NUM>, the uplink signals from UE <NUM> and other UEs may be received by antennas <NUM>, processed by demodulators <NUM>, detected by a MIMO detector <NUM> if applicable, and further processed by a receive processor <NUM> to obtain decoded data and control information sent by UE <NUM>. BS <NUM> may include communication unit <NUM> and communicate to network controller <NUM> via communication unit <NUM>.

Controller/processor <NUM> of BS <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform wakeup signal generation and transmission in <NUM>. For example, controller/processor <NUM> of BS <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform or direct operations of, for example, method <NUM> of <FIG>, method <NUM> of <FIG>, method <NUM> of <FIG>, method <NUM> of <FIG> and/or other processes as described herein. Memories <NUM> and <NUM> may store data and program codes for BS <NUM> and UE <NUM>, respectively.

<FIG> is a diagram illustrating an example <NUM> of generation and transmission of a wakeup signal for a UE group.

As shown by reference number <NUM>, a BS <NUM> may generate a wakeup signal for a UE group shown as UE group <NUM>. In some aspects, the UE group may be associated with a UE group identifier (e.g., <NUM>, <NUM>, ABCD, 19D76, and/or the like). The UE group may include one or more UEs. For the purpose of <FIG>, assume that UE <NUM> is included in the UE group. The BS <NUM> may generate the wakeup signal so that the UE <NUM> can determine that the wakeup signal is associated with the UE <NUM> and/or the UE group <NUM>, as described in more detail below. For example, a preamble of the wakeup signal may identify the UE group <NUM> and/or a cell identity of a cell provided by the BS <NUM>.

As shown by reference number <NUM>, the BS <NUM> may encode the preamble of the wakeup signal to indicate at least a portion of a cell identifier. For example, the BS <NUM> may use a Zadoff-Chu (ZC) sequence with a particular root to indicate the cell identifier. In some aspects, the BS <NUM> may use a ZC sequence with a particular root to indicate a UE group identifier.

In some aspects, the preamble may extend across multiple symbols. In such a case, the ZC sequence may be a <NUM>-length ZC sequence, which may be mapped to <NUM> resource elements in <NUM> symbols of a physical resource block (PRB). In some aspects, the ZC sequence may use a same root as a synchronization signal. For example, the ZC sequence may use a same root as a narrowband secondary synchronization signal (NSSS), which may reduce time associated with retuning to detect the wakeup signal and/or preamble. As a more particular example, the wakeup signal is a ZC sequence with cyclic shift, further scrambled by a cover code, which may be determined based at least in part on the following: <MAT> <MAT> <MAT> wherein d(n) is a sequence for a wakeup signal based on the <NUM>-length ZC sequence n is an integer (e.g., in a range of <NUM> to <NUM>), b(m) is a cover code or scrambling code, m is an integer (e.g., in a range of <NUM> to <NUM>), j is a complex reflection coefficient, θf is a phase shift, and <MAT> is a cell identifier.

In some aspects, the cyclic shift may indicate at least a portion of the UE group identifier and/or at least a portion of the cell identity based at least in part on a cyclic shift. For example, the UE <NUM> may determine the cyclic shift using <MAT>.

As shown by reference number <NUM>, the BS <NUM> may encode a cover code to the preamble to indicate at least a portion of the UE group identifier and/or at least a portion of the cell identifier. When the preamble extends across multiple symbols, a resource-element level cover code may be determined using a Gold sequence of a particular length (e.g., a length of <NUM> and/or the like). More particularly, the cover code b(m) may be determined based at least in part on the following equations and values: <MAT> <MAT> <MAT> with <MAT> initialized by <MAT> <MAT> If there is no UE group ID, the cover codes may be simplified as a on m-sequence, such as: <MAT> <MAT> with <MAT> initialized by <MAT> In some aspects, the wakeup signal maybe composed of a sequence that is repeated over multiple resource blocks within a narrowband.

The cover code is based at least in part on a system frame number (SFN) of the BS <NUM>. For example, the cover code may be based at least in part on an SFN-related index. This enables the UE to identify the wakeup signal based at least in part on the NPSS and/or NSSS without having to detect or decode the physical broadcast channel (PBCH) prior to wakeup signal detection. In such a case, m<NUM> in the above equation may be given by <MAT> if NUE group ≤ <NUM> ; otherwise if <NUM> < NUE group ≤ <NUM>, <MAT>, wherein nf is an SFN, NUE group is the total number of UE groups configured by the network with <NUM> ≤ NUE group ≤ <NUM>, and <MAT> is a UE group identifier and <MAT>. Note that in the above equation of m<NUM>, nf can be set as the SFN of the wakeup signal starting subframe. In the time-domain, the same wakeup signal sequence is repeated over subframes so that UEs use same local wakeup signal sequence for correlation per subframe with less searching complexity, rather than changing the different sequences if the SFN changes during the wakeup signal duration. On top of each wakeup signal subframe-level repetition, a cell-specific binary scrambling code can be applied to help interference randomization. Similarly, in the case of eMTC with max 6PRB bandwidth, if the wakeup signal sequence of <NUM> PRB is repeated over multiple PRBs in the frequency domain, a cell-specific binary PRB-level scrambling code multiplexed with the wakeup signal sequence can help peak-to-average power ratio (PAPR) reduction. Other interference randomization schemes are also possible for eMTC instead of frequency-domain PRB repetitions with scrambling, such as mapping the wakeup signal sequence on one PRB within <NUM> PRB bandwidth with power boosting and changing the frequency PRB location of the wakeup signal sequence.

In some aspects, the wakeup signal is a ZC sequence with no cyclic shift, scrambled by a cover code, which may be determined based at least in part on the following: <MAT> <MAT> <MAT>.

Here, using no cyclic shift on the ZC sequence is more robust against the timing drift. As shown by reference number <NUM>, the BS <NUM> encodes a cover code of the preamble to indicate at least a portion of the UE group identifier and/or at least a portion of the cell identifier. When the preamble extends across multiple symbols, a resource-element level cover code may be determined using a Gold sequence of a particular length (e.g., a length of <NUM> and/or the like). More particularly, the cover code b(m) may be determined based at least in part on the following equations and values: <MAT> <MAT> with <MAT> <MAT> initialized by <MAT> <MAT>.

In some aspects, the cover code may be based at least in part on a system frame number (SFN) of the BS <NUM>. For example, the cover code may be based at least in part on an SFN-related index. This may enable the UE to identify the wakeup signal based at least in part on the NPSS and/or NSSS without having to detect or decode the PBCH prior to wakeup signal detection. In such a case, m<NUM> in the above equation may be given by <MAT>, wherein nf is an SFN, NUE group is the total number of UE groups configured by the network with <NUM> ≤ NUE group ≤ <NUM>, and <MAT> is a UE group identifier and <MAT>. Note that in the above equation of m<NUM>, nf can be set as the SFN of the wakeup signal starting subframe. In the time-domain, the same wakeup signal sequence is repeated over subframes so that UEs use same local wakeup signal sequence for correlation per subframe with less searching complexity, rather than changing the different sequences if the SFN changes during the wakeup signal duration. In addition to each wakeup signal subframe-level repetition, a cell-specific binary scrambling code can be applied to help interference randomization. Similarly, in case of eMTC with up to <NUM> PRB bandwidth, if the wakeup signal sequence of <NUM> PRB is repeated over multiple PRBs in the frequency domain, a cell-specific binary PRB-level scrambling code multiplexed with wakeup signal sequence can help PAPR reduction. Other interference randomization scheme is also possible for eMTC instead of frequency-domain PRB repetitions with scrambling, such as mapping the wakeup signal sequence on one PRB within <NUM> PRB bandwidth with power boosting but changing the frequency PRB location of the wakeup signal sequence.

In some aspects, the preamble may be based at least in part on a sequence with single symbol in length, and may be extended to multiple symbols. For example, multiple short one-symbol preambles may be concatenated and/or repeated for two or more symbols. The repeated symbols may be scrambled by a cover code. In such a case, a ZC sequence may have an <NUM>-symbol length, which may be similar to a ZC sequence of a synchronization signal (e.g., a narrowband primary synchronization signal (NPSS), thereby enabling time-domain auto-correlation and cross-correlation. Additionally, or alternatively, such a ZC sequence may use a different root than the NPSS, which may avoid the confusion between the wakeup signal and the NPSS. For example, the root may be selected from possible values of <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, in which <NUM> is omitted because a root of <NUM> is used for the NPSS. In such a case, the UE <NUM> may select the root based at least in part on an index value q, which may be selected as <MAT>. In this case, <MAT> is a UE group identifier of the UE <NUM> (e.g., the UE group <NUM>). Therefore, as a more particular example, the wakeup signal is a ZC sequence, further scrambled by a cover code, which may be determined based at least in part on the following: <MAT> <MAT> <MAT> wherein d(k,n) is a sequence for a wakeup signal based on the <NUM>-length ZC sequence mapping on the k-th symbol, k is the symbol index (e.g., k=<NUM>. <NUM>) within a <NUM>-symbol subframe, and n is an integer (e.g., in a range of <NUM> to <NUM>), b(m) is a cover code or scrambling code, m is an integer (e.g., in a range of <NUM> to <NUM>), and j is a complex reflection coefficient.

In some aspects, when the cover code at a per-symbol level, a symbol-level cover code may be used with an <NUM>-length sequence, so that respective elements of the cover code are applied to <NUM> symbols. For example, a truncated m sequence may be used. More particularly, the truncated m sequence may be determined according to <MAT>. Furthermore, in such a case, the cover code may be determined using the following equations and values: <MAT> with <MAT> initialized by <MAT>.

Additionally, or alternatively, a resource-element level cover code may be used. In such a case, the cover code may have a length of <NUM>. As a more particular example, the wakeup signal is a ZC sequence scrambled by such a resource-element level cover code, which may be determined based at least in part on the following: <MAT> <MAT> <MAT> wherein d(k,n) is a sequence for a wakeup signal based on the <NUM>-length ZC sequence mapping on the k-th symbol, k is the symbol index (e.g., k=<NUM>. <NUM>) within a <NUM>-symbol subframe, and n is an integer (e.g., in a range of <NUM> to <NUM>), b(m) is a cover code or scrambling code, m is an integer (e.g., in a range of <NUM> to <NUM>), j is a complex reflection coefficient.

For example, the cover code may be determined using a truncated Gold sequence, such as a <NUM>-length Gold sequence. More particularly, the cover code may be determined using the following equations: <MAT> <MAT> with <MAT> <MAT> initialized by <MAT> <MAT>.

In this way, a cover code is determined on a per-symbol basis or a per-resource element basis to indicate a cell and/or UE group associated with a wakeup signal to which the cover code is applied.

In some aspects, the multiple short one-symbol preambles may be concatenated using a combination of different roots for two or more symbols to extend the capacity of the preambles. The root may be selected from possible values of <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, in which <NUM> is omitted because a root of <NUM> is used for the NPSS. For example, the roots for <NUM>-symbol preamble may be selected as using different root combinations, such as all <NUM> symbols using the same root u, or part of <NUM> symbols using root u1 but the remaining part of the <NUM> symbols using the conjugate root as u2. If u1+u2=<NUM>, the roots may be conjugate root pairs. Note that the conjugate root pairs of the ZC sequences can be detected in parallel to reduce the receiver complexity. The Table below illustrates the root combinations with index c to generate a concatenated/repeated one-symbol preambles. In such a case, the UE <NUM> may select one of the root combination such as <MAT> so that a larger UE group identifier can be differentiated by the preamble.

In some aspects, the wakeup signal may be mapped to particular resources. For example, a wakeup signal that occupies <NUM> physical resource block (PRB) may occupy a set of continuous symbols (e.g., symbols <NUM> through <NUM>) within a bandwidth of <NUM> (e.g., corresponding to <NUM> subcarriers of <NUM>). Additionally, or alternatively, the wakeup signal may puncture one or more signals of the PRB. For example, the wakeup signal may puncture resource elements reserved for a cell-specific reference signal (CRS), a narrowband reference signal (NRS), and/or the like. More particularly, the wakeup signal may puncture REs for the CRS on all antenna ports, may puncture the REs for the NRS on a first antenna port (e.g., antenna port <NUM>), and may puncture the REs for the NRS on a second antenna port (e.g., antenna port <NUM>). In some aspects, the wakeup signal may puncture the REs in a particular case, such as for inband NB-IoT. In the case when the <NUM>-length ZC sequence is used (e.g., for per-symbol mapping), the ZC sequence may be mapped on <NUM> subcarriers of the PRB, and a 12th subcarrier, such as a subcarrier associated with a particular index, may not be used.

As shown by reference number <NUM>, the BS <NUM> may transmit the wakeup signal. In some aspects, the BS <NUM> may transmit the wakeup signal in particular resources and/or using particular antenna ports, as described in more detail above.

As shown by reference number <NUM>, the UE <NUM> may receive the wakeup signal. In some aspects, the UE <NUM> may receive the wakeup signal based at least in part on a technique selected by the UE <NUM>. For example, the UE <NUM> may use a first technique wherein the UE <NUM> receives the wakeup signal without performing synchronization using a legacy synchronization signal, such as an NPSS, an NSSS, a CRS, an NRS, a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and/or the like. In some aspects, the UE <NUM> may perform synchronization using the wakeup signal, which may require a timing and/or frequency drift estimation based at least in part on auto-correlation and/or cross-correlation of the wakeup signal.

In some aspects, the UE <NUM> may use a second technique wherein a partial synchronization is performed. In this case, the UE <NUM> may use a PSS or NPSS to determine a raw timing and/or frequency drift correction before detecting the wakeup signal. In this way, the UE <NUM> can detect the wakeup signal with reduced timing and/or frequency error by using the PSS or NPSS to perform partial synchronization.

In some aspects, the UE <NUM> may use a third technique wherein a full synchronization is performed before the wakeup signal is detected. In this case, the UE <NUM> may use legacy synchronization signals for a fine timing and/or frequency correction. Additionally, or alternatively, the UE <NUM> may use the legacy synchronization signal to determine a phase reference, for example, when the legacy synchronization signal is transmitted using a same port as the wakeup signal.

The UE <NUM> may select a technique from the first technique, the second technique, and the third technique based at least in part on parameters and/or operating conditions of the UE <NUM>. For example, the parameters and/or operating conditions may include a discontinuous reception (DRX) cycle configuration of the UE, an extended DRX (eDRX) cycle of the UE <NUM>, a probability of encountering a paging occasion, a frequency error or frequency drift of a local oscillator or real-time clock of the UE, and/or the like. In this way, the UE <NUM> may determine a technique based at least in part on resource availability and/or operating conditions of the UE <NUM>, which improves efficiency of the wakeup signaling process and reduces waste associated with performing a partial or full synchronization when a partial or full synchronization is not needed.

As shown by reference number <NUM>, the UE <NUM> may determine that the preamble of the wakeup signal matches a cell identity and a UE group identifier associated with the UE <NUM>. For example, the BS <NUM> may configure the UE <NUM> with information identifying the cell identity and/or the UE group identifier. Additionally, or alternatively, the UE <NUM> may determine the UE group identifier (e.g., based at least in part on a UE identifier of the UE <NUM> and/or the like).

As shown by reference number <NUM>, the UE <NUM> may monitor for a subsequent communication according to the wakeup signal. For example, the UE <NUM> may exit a dormant or idle state, and may scan for paging and/or a grant associated with a downlink communication. As shown by reference number <NUM>, the UE <NUM> may receive the communication. In some aspects, the UE <NUM> may wake up or perform a wakeup based at least in part on the wakeup signal. As used herein, waking up or performing a wakeup may refer to monitoring or beginning to monitor for paging at paging occasions. For example, when waking up or performing a wakeup, the UE may monitor or begin to monitor for a control channel (e.g., a PDCCH such as an MTC PDCCH or a narrowband PDCCH, etc.), a data channel (e.g., a PDSCH such as an MTC PDSCH or a narrowband PDSCH, etc.), and/or a different type of paging.

In this way, a wakeup signal is encoded using a cover code, a ZC sequence, and/or a cyclic shift to convey information, identifying a UE group identifier and/or cell identity of the wakeup signal, to a UE <NUM>. By using the cover code, ZC sequence, and/or cyclic shift, compatibility with legacy implementations is improved. Furthermore, the UE group identifier and/or cell identity can be provided to the UE <NUM> without significantly increasing a size of the wakeup signal, which further improves compatibility with legacy implementations and conserves radio resources.

<FIG> is a flow chart of a method <NUM> of wireless communication. The method may be performed by a base station (e.g., the BS <NUM> of <FIG>, the apparatus <NUM>/<NUM>', and/or the like).

At <NUM>, the base station may generate a wakeup signal for at least one UE (e.g., the UE <NUM>, the apparatus <NUM>/<NUM>', and/or the like) of a UE group. For example, the BS <NUM> may encode a preamble of the wakeup signal to identify at least one of a portion of a UE group identifier of the wakeup signal or a portion of a cell identity of the wakeup signal. In some aspects, the preamble may span across multiple, different symbols. In some aspects, the preamble may be determined and/or applied on a per-symbol basis. In some aspects, the wakeup signal is composed of a sequence that is repeated over multiple resource blocks within a narrowband.

In some aspects, the portion of the UE group identifier includes an entirety of the UE group identifier, and/or wherein the portion of the cell identity includes an entirety of the cell identity. In some aspects, the preamble is encoded using a sequence with a length corresponding to two or more symbols. In some aspects, a cyclic shift of the preamble identifies the portion of the UE group identifier.

In some aspects, the preamble is generated using a Zadoff-Chu sequence that is configured to identify the portion of UE group identifier and/or the portion of the cell identity. For example, the Zadoff-Chu sequence may use a root other than a root associated with a synchronization signal. In some aspects, the Zadoff-Chu sequence uses a same root as a synchronization signal. Additionally, or alternatively, the Zadoff-Chu sequence may be mapped to a plurality of subcarriers of a resource block, and the Zadoff-Chu sequence may not be mapped to a subcarrier associated with a particular index.

In some aspects, a cyclic shift of the preamble identifies the portion of the UE group identifier and/or the portion of the cell identity. In some aspects, a cover code of the preamble identifies the portion of the UE group identifier and/or the portion of the cell identity. The cover code may be configured based at least in part on a length corresponding to a number of symbols of the preamble, and each element of the cover code may be applied to a single symbol. In some aspects, the cover code is based at least in part on a system frame number of the base station.

In some aspects, the preamble is one of a plurality of preambles that are encoded using a sequence with a length that corresponds to a single symbol, and wherein the plurality of preambles is concatenated into two or more symbols. In some aspects, the cell identity corresponds to a camped cell or connected cell of the UE group.

At <NUM>, the base station may transmit the wakeup signal to the at least one UE. For example, the base station may broadcast the wakeup signal in particular resources, which may be allocated as described elsewhere herein. The at least one UE may identify the wakeup signal based at least in part on the preamble. For example, the at least one UE may determine whether a cell identity and/or UE group identifier of the preamble is associated with the at least one UE. In some aspects, the wakeup signal punctures one or more resources allocated for at least one reference signal.

At <NUM>, the base station may transmit a communication to the UE based at least in part on the wakeup signal. For example, the base station may transmit the communication immediately or after a delay that is known to the base station and/or the UE. In this way, the base station configures the UE to wake up for the communication, which enables the UE to remain in a low power state wherein the UE does not check paging or grants. Thus, battery life of the UE is improved.

Although <FIG> shows example blocks of a method of wireless communication, in some aspects, the method may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those shown in <FIG>. Additionally, or alternatively, two or more blocks shown in <FIG> may be performed in parallel.

<FIG> is a flow chart of a method <NUM> of wireless communication. The method may be performed by a UE (e.g., the UE <NUM> of <FIG>, the apparatus <NUM>/<NUM>', and/or the like).

At <NUM>, the UE may optionally select a technique to detect a wakeup signal. For example, the UE may select a first synchronization technique, a second synchronization technique, or a third synchronization technique. In the first synchronization technique, no synchronization of the UE is performed. In the second synchronization technique, a partial synchronization of the UE is performed. For example, the wakeup signal may be detected after a partial synchronization of the UE using a synchronization signal. In some aspects, the wakeup signal is detected based at least in part on a system frame number (SFN), and the SFN is indicated by the preamble of the wakeup signal. In the third synchronization technique, a full synchronization of the UE is performed. For example, the wakeup signal may be detected after a full synchronization of the UE using one or more synchronization signals. The UE may select the technique based at least in part on an operating condition or parameter of the UE.

At <NUM>, the UE may determine that the wakeup signal detected by the UE is associated with the UE. For example, the UE may determine that the wakeup signal is associated with the UE based at least in part on a UE group identifier and/or cell identity of the wakeup signal, as described in more detail elsewhere herein.

At <NUM>, the UE may receive a communication based at least in part on the wakeup signal. For example, the UE may receive the communication immediately after detecting the wakeup signal or after a particular delay after detecting the wakeup signal. The UE may wake up or exit an idle or dormant state to receive the communication.

At <NUM>, the UE may optionally perform synchronization using the wakeup signal. For example, the UE may determine a reference value, a timing and/or frequency drift estimation, and/or the like. In this way, the UE may reduce reliance on legacy synchronization signals, which improves spectral efficiency.

<FIG> is a conceptual data flow diagram <NUM> illustrating the data flow between different modules/means/components in an example apparatus <NUM>. The apparatus <NUM> may be base station, such as an eNB, a gNB, and/or the like. In some aspects, the apparatus <NUM> includes a reception module <NUM>, a generation module <NUM>, and/or a transmission module <NUM>.

The reception module <NUM> may receive data <NUM> from a UE <NUM> (e.g., the UE <NUM> and/or the like). In some aspects, the data <NUM> may indicate a UE group identifier of the UE, and/or the like. The reception module <NUM> may provide the data <NUM> as data <NUM> to the generation module <NUM>. The generation module <NUM> may generate a wakeup signal for at least one UE <NUM> of a UE group. The generation module may provide the wakeup signal to the transmission module <NUM> as data <NUM>. The transmission module <NUM> may transmit the wakeup signal to the UE <NUM> as signals <NUM>.

The apparatus may include additional modules that perform each of the blocks of the algorithm in the aforementioned flow chart of <FIG>. As such, each block in the aforementioned flow chart of <FIG> may be performed by a module and the apparatus may include one or more of those modules. The modules may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.

<FIG> is a diagram <NUM> illustrating an example of a hardware implementation for an apparatus <NUM>' employing a processing system <NUM>. The apparatus <NUM>' may be a base station, such as an eNB, a gNB, and/or the like.

The processing system <NUM> may be implemented with a bus architecture, represented generally by the bus <NUM>. The bus <NUM> may include any number of interconnecting buses and bridges depending on the specific application of the processing system <NUM> and the overall design constraints. The bus <NUM> links together various circuits including one or more processors and/or hardware modules, represented by the processor <NUM>, the modules <NUM>, <NUM>, <NUM>, and the computer-readable medium / memory <NUM>. The bus <NUM> may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatus over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically the reception module <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically the transmission module <NUM>, and based at least in part on the received information, generates a signal to be applied to the one or more antennas <NUM>. The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described supra for any particular apparatus. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system further includes at least one of the modules <NUM>, <NUM>, and <NUM>. The modules may be software modules running in the processor <NUM>, resident/stored in the computer-readable medium / memory <NUM>, one or more hardware modules coupled to the processor <NUM>, or some combination thereof. The processing system <NUM> may be a component of the BS <NUM> and may include the memory <NUM> and/or at least one of the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM>.

In some aspects, the apparatus <NUM>/<NUM>' for wireless communication includes means for generating a wakeup signal for at least one UE of a UE group, means for transmitting the wakeup signal to the at least one UE, and/or the like. The aforementioned means may be one or more of the aforementioned modules of the apparatus <NUM> and/or the processing system <NUM> of the apparatus <NUM>' configured to perform the functions recited by the aforementioned means. As described supra, the processing system <NUM> may include the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM>. As such, in one configuration, the aforementioned means may be the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM> configured to perform the functions recited by the aforementioned means.

Other examples are possible and may differ from what was described in connection with <FIG>.

<FIG> is a conceptual data flow diagram <NUM> illustrating the data flow between different modules/means/components in an example apparatus <NUM>. The apparatus <NUM> may be a UE. In some aspects, the apparatus <NUM> includes a reception module <NUM>, a determination module <NUM>, a performance module <NUM>, and/or a transmission module <NUM>.

The reception module <NUM> may receive signals <NUM> from a BS <NUM>. The signals <NUM> may include a wakeup signal. For example, the reception module <NUM> may detect the wakeup signal. The reception module may provide data <NUM> to the determination module <NUM> and/or the performance module <NUM>. The data <NUM> may identify the wakeup signal. The determination module <NUM> may determine that the wakeup signal is associated with the apparatus <NUM> based at least in part on the wakeup signal being for a UE group that includes the apparatus <NUM>. The performance module <NUM> may perform synchronization based at least in part on the wakeup signal. The transmission module <NUM> may transmit information of the apparatus <NUM>.

<FIG> is a diagram illustrating an example <NUM> of a hardware implementation for an apparatus <NUM>' employing a processing system <NUM>. The apparatus <NUM>' may be a UE (e.g., the UE <NUM> and/or the like).

The processing system <NUM> may be implemented with a bus architecture, represented generally by the bus <NUM>. The bus <NUM> may include any number of interconnecting buses and bridges depending on the specific application of the processing system <NUM> and the overall design constraints. The bus <NUM> links together various circuits including one or more processors and/or hardware modules, represented by the processor <NUM>, the modules <NUM>, <NUM>, <NUM>, <NUM>, and the computer-readable medium / memory <NUM>. The bus <NUM> may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatus over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically the reception module <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically the transmission module <NUM>, and based at least in part on the received information, generates a signal to be applied to the one or more antennas <NUM>. The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described supra for any particular apparatus. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system further includes at least one of the modules <NUM>, <NUM>, <NUM>, and <NUM>. The modules may be software modules running in the processor <NUM>, resident/stored in the computer-readable medium / memory <NUM>, one or more hardware modules coupled to the processor <NUM>, or some combination thereof. The processing system <NUM> may be a component of the UE <NUM> and may include the memory <NUM> and/or at least one of the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM>.

In some aspects, the apparatus <NUM>/<NUM>' for wireless communication includes means for determining that a wakeup signal detected by the apparatus <NUM>/<NUM>' is associated with the apparatus <NUM>/<NUM>', means for receiving a communication based at least in part on the wakeup signal, means for performing synchronization using the wakeup signal based at least in part on a timing or frequency drift estimation of the apparatus <NUM>/<NUM>', means for selecting a technique to use to detect the wakeup signal based at least in part on an operating condition or parameter of the apparatus <NUM>/<NUM>'. The aforementioned means may be one or more of the aforementioned modules of the apparatus <NUM> and/or the processing system <NUM> of the apparatus <NUM>' configured to perform the functions recited by the aforementioned means. As described supra, the processing system <NUM> may include the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM>. As such, in one configuration, the aforementioned means may be the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM> configured to perform the functions recited by the aforementioned means.

<FIG> is a diagram illustrating an example <NUM> of generation and transmission of a wakeup signal for a UE in a guardband mode or a standalone mode. As shown in <FIG>, and by reference number <NUM>, a UE <NUM> may be in a GB/SA mode. In some aspects, the BS <NUM> may determine that the UE <NUM> is in the GB/SA mode (e.g., based at least in part on configuration of the UE <NUM>, a connection type with the UE <NUM>, information received from the UE <NUM> indicating that the UE <NUM> is in the GB/SA mode, and/or the like). In some cases, the BS <NUM> may determine that the UE <NUM> is in the GB/SA mode based on the deployment type of the BS <NUM>.

While a single abbreviation is used for GB/SA mode, GB/SA mode may be two different modes: a guardband mode in which the UE <NUM> communicates in a guardband, and a standalone mode in which the UE <NUM> communicates using a carrier that is not associated with any other radio access technology (RAT), such as a RAT wherein a control channel does not always occupy one or more particular symbols of a subframe. Furthermore, the values, techniques, and apparatuses described herein need not be implemented identically for GB mode and SA mode. For example, a different implementation may be used for GB mode than for SA mode, or the values and techniques and apparatuses described herein may be used for only one of GB mode or SA mode. In some aspects, it may be possible to use a GB mode when deploying a carrier within a RAT that does not have a control region (e.g. a new radio (NR) carrier)).

In some aspects, a wakeup signal may have the following structure: dWUS(n) = c(m) · e-j2πθn · e-jπun'(n'+<NUM>)/LZC, wherein n' = n mod Length of ZC, and m = <MAT>. In some aspects, LZC (e.g., the length of the ZC sequence) may be equal to <NUM> for an inband mode, and may have one or more values described below in a GB/SA mode. A base sequence for an inband wakeup signal may use a <NUM>-length ZC sequence, a <NUM>-length cover, and an optional phase shift. The <NUM>- length cover code may include a <NUM>-length Gold sequence, a <NUM>-length m sequence, or a <NUM>-length Hadamard code.

As shown by reference number <NUM>, the BS <NUM> may generate a wakeup signal for the UE <NUM>. For example, the BS <NUM> may generate the wakeup signal using a base sequence. As used herein, a base sequence may identify a value that is to be used for one or more symbols of a subframe when generating the wakeup signal. As further shown, the base sequence, which may be for a first deployment mode (e.g., the GB/SA mode) may include more symbols per subframe than a base sequence for a second deployment mode (e.g., an inband mode). As one non-limiting example, the base sequence for the GB/SA mode may include <NUM> symbols, and the base sequence for the inband mode may include <NUM> symbols. For example, a first three symbols of the base sequence for the inband mode may be used for a PDCCH of each subframe.

In some aspects, the BS <NUM> may generate the wakeup signal using one or more additional values that are selected from the base sequence for the inband mode. For example, the base sequence for the GB/SA mode may include the one or more additional values and the base sequence for the inband mode (e.g., an entirety of the base sequence for the inband mode or a subset of the base sequence for the inband mode). As examples, a base sequence for an inband mode may use the following sequence per subframe: [x x x <NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM>], since the first three symbols are used for the PDCCH. In such a case, non-limiting examples of the base sequence for the GB/SA mode may include [<NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM>], [<NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM>], and [<NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM>], though other examples are possible and contemplated herein. In some aspects, the one or more additional values are mapped to a first <NUM> symbols of a first slot and are selected from the interior of the base sequence for the inband mode. In such a case, the interior of the base sequence for the inband mode includes a first <NUM> symbols of a second slot (e.g., [<NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM>]). As used herein, the interior of the base sequence refers to values not at the beginning or end of the base station. For example, the one or more additional values, for a base sequence [x x x <NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM>], may include any one or more of the values <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and/or <NUM>.

In some aspects, the examples above may be implemented by mapping a <NUM>-length base sequence in a frequency first-time second manner to <NUM> subcarriers in each of the <NUM> symbols of a subframe (corresponding to the inband symbols [x x x <NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM>]), and then repeating some of the symbols in the remaining <NUM> symbols.

In some aspects, the BS <NUM> may use [<NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM><NUM>] for the base sequence for the GB/SA mode based at least in part on a cyclic prefix length being different for different symbols of a subframe. For example, the first symbol of a slot may have a longer cyclic prefix (CP) than other symbols of the subframe. Each subframe may have two slots with <NUM> symbols per slot. For example, in this case, [<NUM><NUM><NUM><NUM><NUM><NUM><NUM>] may be in a first slot and [<NUM><NUM><NUM><NUM><NUM><NUM><NUM>] may be in a second slot. This may provide for the same cyclic prefix to be used for the fourth symbol of the inband base sequence, thus improving commonality between wakeup signals for the inband mode and the GB/SA mode.

In some aspects, the BS <NUM> may generate the base sequence for the GB/SA mode using at least one of a same sequence (e.g., a ZC sequence or another sequence) or cover code as the base sequence for the inband mode. For example, in some aspects, the BS <NUM> may use the <NUM>-length ZC and the <NUM>-length cover code of the base sequence for the inband mode to generate the base sequence. In some aspects, the BS <NUM> may reuse the <NUM>-length ZC, and may use a different length of cover code (e.g., a <NUM>-length cover code and/or the like) (<NUM> may be selected because there are <NUM> subcarriers across <NUM> symbols). In some aspects, the BS <NUM> may reuse the <NUM>-length cover codes and may use a different length of sequence (e.g., a <NUM>-length ZC and/or the like).

In some aspects, the BS <NUM> may use a different sequence and a different cover code than for inband mode to generate the base sequence for the GB/SA mode. For example, the BS <NUM> may use a <NUM>-length ZC and a <NUM>-length cover code to generate the base sequence. In some aspects, the BS <NUM> may apply a phase shift to generate the base sequence for the GB/SA mode.

In some aspects, the BS <NUM> may perform time-domain scrambling of the base sequence. For example, the BS <NUM> may perform time-domain scrambling on a symbol level (e.g., per symbol). In some aspects, the BS <NUM> may vary the time-domain scrambling in time. For example, the time-domain scrambling may be different at a first time (e.g., symbol, slot, subframe, frame, etc.) than at a second time (e.g., symbol, slot, subframe, frame, etc.). In some aspects, the time-domain scrambling may be based at least in part on a pseudorandom noise (PN) sequence. For example, the PN sequence may be based at least in part on at least one of a cell identifier or a time index. In one example, the time-domain scrambling may be implemented by a scrambling in the frequency domain, wherein all the resource elements in the same OFDM symbol are scrambled by the same value. In another example, the time-domain scrambling may be combined with (e.g., multiplied by) the base sequence cover code c(m).

As shown by reference number <NUM>, the BS <NUM> may transmit the wakeup signal to the UE <NUM>. As shown by reference number <NUM>, in some aspects, the UE <NUM> may wake up (e.g., may perform a wakeup) based at least in part on receiving the wakeup signal. In some aspects, the UE <NUM> may be configured with information identifying the base sequence for the GB/SA mode. In some aspects, the UE <NUM> may determine the base sequence for the GB/SA mode. For example, the UE <NUM> may perform one or more of the operations described herein to determine the base sequence for the GB/SA mode, and may detect the wakeup signal based at least in part on the base sequence for the GB/SA mode.

At <NUM>, the base station may determine that a UE is associated with a guardband mode or a standalone mode. For example, the BS <NUM> (e.g., using controller/processor <NUM> and/or the like) may determine that the UE <NUM> is in the GB/SA mode. In some aspects, the BS <NUM> may determine that the UE <NUM> is in the GB/SA mode based at least in part on configuration of the UE <NUM>. In some aspects, the BS <NUM> may determine that the UE <NUM> is in the GB/SA mode based at least in part on a connection type with the UE <NUM>. In some aspects, the BS <NUM> may determine that the UE <NUM> is in the GB/SA mode based at least in part on information received from the UE <NUM> indicating that the UE <NUM> is in the GB/SA mode, and/or the like. In some aspects, the BS <NUM> may determine that the UE is in the GB/SA mode based on the deployment type of the BS <NUM>.

At <NUM>, the base station may generate a wakeup signal for the UE in the GB/SA mode. For example, the base station (e.g., using controller/processor <NUM> and/or the like) may generate a wakeup signal. In some aspects, the base station may generate the wakeup signal based at least in part on a first base sequence associated with a first deployment mode. The first base sequence may include more symbols than a second base sequence associated with a second deployment mode. In some aspects, the first deployment mode may be the GB/SA mode, and the second deployment mode may be an inband mode.

In some aspects, the base sequence for the GB/SA mode includes one or more reused values that are selected from the base sequence for the inband mode, and wherein the base sequence for the GB/SA mode includes the base sequence for the inband mode. In some aspects, the one or more reused values are selected from an end of the base sequence for the inband mode. In some aspects, the one or more reused values are selected from a beginning of the base sequence for the inband mode. In some aspects, the one or more reused values are selected from an interior of the base sequence for the inband mode. In some aspects, the one or more reused values are mapped to a first <NUM> symbols of a first slot and are selected from the interior of the base sequence for the inband mode, and wherein the interior of the base sequence for the inband mode includes a first <NUM> symbols of a second slot.

In some aspects, the base sequence for the GB/SA mode uses a same Zadoff-Chu sequence and a same cover code as the base sequence for the inband mode. In some aspects, the base sequence for the GB/SA mode uses a same Zadoff-Chu sequence and a different cover code than the base sequence for the inband mode. In some aspects, the base sequence for the GB/SA mode uses a different Zadoff-Chu sequence and a same cover code as the base sequence for the inband mode.

In some aspects, the base sequence for the GB/SA mode is generated using a different Zadoff-Chu sequence and a different cover code than a base sequence for an inband mode. In some aspects, the Zadoff-Chu sequence for the base sequence for the GB/SA mode is a <NUM>-length Zadoff-Chu sequence. In some aspects, the cover code for the base sequence for the GB/SA mode is a <NUM>-length cover code. In some aspects, the cover code for the base sequence for the GB/SA mode is based at least in part on at least one of a truncated <NUM>-length Gold sequence, a <NUM>-length m sequence, or a <NUM>-length Hadamard code. For example, the wakeup signal with <NUM>-length ZC sequence, and <NUM>-length cover codes generated by using <NUM>-length Gold sequence, is given below: <MAT> <MAT> <MAT> <MAT> <MAT> with <MAT> <MAT> initialized by <MAT> <MAT> wherein the root of the ZC sequence is based at least in part on a partial cell ID and the initialization values for the Gold sequence are similar to (e.g., equal to, a modification of) that of the inband wakeup signal.

If there is no UE group ID, the cover codes may be simplified as a truncated <NUM>-length m sequence, illustrated by <MAT> <MAT> with <MAT> initialized by <MAT>.

In some aspects, time-domain scrambling of the base sequence for the GB/SA mode is performed on a symbol level and varied in time. In some aspects, the time-domain scrambling is based at least in part on a pseudorandom noise (PN) sequence that is based at least in part on at least one of a cell identifier or a time index combined with the base sequence for the GB/SA mode per subframe.

In some aspects, the first base sequence includes the second base sequence, and includes one or more additional values from the second base sequence. In some aspects, the one or more additional values are selected from an interior of the second base sequence. In some aspects, the one or more additional values are mapped to a first <NUM> symbols of a first slot in a subframe and are selected from the interior of the second base sequence, and wherein the interior of the second base sequence includes a first <NUM> symbols of a second slot in the subframe. In some aspects, the first base sequence is generated using a same Zadoff-Chu sequence and a same cover code as the second base sequence.

In some aspects, time-domain scrambling of the first base sequence is performed on a symbol level and is varied in time. In some aspects, the time-domain scrambling is based at least in part on a pseudorandom noise (PN) sequence that is based at least in part on at least one of a cell identifier or a time index combined with the first base sequence per subframe.

At <NUM>, the base station may transmit the wakeup signal. For example, the base station (e.g., using controller/processor <NUM>, transmit processor <NUM>, TX MIMO processor <NUM>, MOD <NUM>, antenna <NUM>, and/or the like) may transmit the wakeup signal to the UE. In some aspects, the UE may perform a wakeup based at least in part on receiving the wakeup signal. In some aspects, the wakeup signal may be transmitted to a group of UEs.

The reception module <NUM> may receive data <NUM> from a UE <NUM> (e.g., UE <NUM> and/or the like). In some aspects, the data <NUM> may indicate that the UE <NUM> is associated with a first deployment mode (e.g., a GB/SA mode). In some aspects, the reception module <NUM> may provide data <NUM> indicating that the UE <NUM> is associated with the first deployment mode.

The generation module may generate a wakeup signal for the UE <NUM> in a first deployment mode, wherein the wakeup signal is generated based at least in part on a first base sequence for the first deployment mode that includes more symbols per subframe than a second base sequence for a second deployment mode (e.g., an inband mode). In some aspects, the generation module <NUM> may generate the wakeup signal in connection with data <NUM>, received from the reception module <NUM>, that indicates that the UE <NUM> is in the first deployment. The generation module <NUM> may provide the wakeup signal as data <NUM>.

The transmission module <NUM> may transmit the wakeup signal, received as data <NUM>, as signals <NUM>. In some aspects, the UE <NUM> may receive the wakeup signal and may perform a wakeup operation based at least in part on receiving the wakeup signal.

In some aspects, the apparatus <NUM>/<NUM>' for wireless communication includes means for generating a wakeup signal for a user equipment (UE) in a guardband mode or a standalone mode, wherein the wakeup signal is based at least in part on a first base sequence associated with a first deployment mode, and the first base sequence includes more symbols than a second base sequence associated with a second deployment mode, means for transmitting the wakeup signal, and/or the like. The aforementioned means may be one or more of the aforementioned modules of the apparatus <NUM> and/or the processing system <NUM> of the apparatus <NUM>' configured to perform the functions recited by the aforementioned means. As described supra, the processing system <NUM> may include the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM>. As such, in one configuration, the aforementioned means may be the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM> configured to perform the functions recited by the aforementioned means.

At <NUM>, the UE (e.g., using antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, and/or the like) may receive the wakeup signal in a GB/SA mode. For example, the UE may operate in a first deployment mode (e.g., a GB mode or an SA mode). The UE may receive a wakeup signal. For example, the UE may monitor for the wakeup signal, and may identify or detect the wakeup signal based at least in part on a preamble of the wakeup signal, a resource in which the wakeup signal is received, and/or the like. The wakeup signal may be based at least in part on a first base sequence associated with a first deployment mode. The first base sequence may include more symbols than a second base sequence associated with a second deployment mode. In some aspects, the first deployment is a GB/SA mode, and the second deployment mode is an inband mode. In some aspects, the first base sequence is a <NUM>-symbol sequence and the second base sequence is an <NUM>-symbol sequence.

At <NUM>, the UE (e.g., using antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, and/or the like) may perform a wakeup based at least in part on the wakeup signal. For example, the UE may activate a reception module and/or the like based at least in part on the wakeup signal, as described in more detail elsewhere herein. In some aspects, the UE may identify particular resources to monitor based at least in part on the wakeup signal. For example, the UE may identify the particular resources based at least in part on the wakeup signal, a configuration associated with the wakeup signal, a gap between the wakeup signal and a communication, and/or the like.

At <NUM>, the UE (e.g., using antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, and/or the like) may optionally receive a communication based at least in part on the wakeup signal. For example, the UE may receive the communication after a gap or delay after the wakeup signal. In some aspects, the UE may activate a reception module or receive chain to receive the communication.

<FIG> is a conceptual data flow diagram <NUM> illustrating the data flow between different modules/means/components in an example apparatus <NUM>. The apparatus <NUM> may be a UE. In some aspects, the apparatus <NUM> includes a reception module <NUM>, a performance module <NUM>, and/or a transmission module <NUM>.

The reception module <NUM> may receive signals <NUM> from a BS <NUM>. The signals <NUM> may include a wakeup signal. For example, the reception module <NUM> may detect the wakeup signal. In some aspects, the reception module <NUM> may detect the wakeup signal based at least in part on a base sequence for a first deployment mode (e.g., the GB/SA mode) that includes more symbols than a base sequence for an a second deployment mode (e.g., the inband mode). The reception module <NUM> may provide data <NUM> to the performance module <NUM>. The data <NUM> may identify the wakeup signal or may indicate to perform a wakeup based at least in part on the wakeup signal. In some aspects, the reception module <NUM> may monitor for and/or receive a communication based at least in part on a wakeup signal. For example, the reception module <NUM> may receive the communication after a delay or gap following the wakeup signal, and/or the like.

The performance module <NUM> may perform a wakeup based at least in part on the wakeup signal. For example, the performance module may cause the apparatus <NUM> (e.g., the reception module <NUM> or another module or component of the apparatus <NUM>) to wake up, to monitor a resource associated with the wakeup signal, to receive a grant or paging associated with a communication, and/or the like. The transmission module <NUM> may transmit signals <NUM> to the BS <NUM>, such as signals to provide information identifying a capability of the UE, and/or the like.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatus over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically the reception module <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically the transmission module <NUM>, and based at least in part on the received information, generates a signal to be applied to the one or more antennas <NUM>. The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described supra for any particular apparatus. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system further includes at least one of the modules <NUM>, <NUM>, and <NUM>. The modules may be software modules running in the processor <NUM>, resident/stored in the computer-readable medium / memory <NUM>, one or more hardware modules coupled to the processor <NUM>, or some combination thereof. The processing system <NUM> may be a component of the UE <NUM> and may include the memory <NUM> and/or at least one of the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM>.

In some aspects, the apparatus <NUM>/<NUM>' for wireless communication includes means for receiving a wakeup signal in a guardband mode or a standalone mode (GB/SA mode), wherein the wakeup signal is based at least in part on a first base sequence associated with a first deployment mode, and the first base sequence includes more symbols than a second base sequence associated with a second deployment mode; and means for performing a wakeup based at least in part on the wakeup signal. The aforementioned means may be one or more of the aforementioned modules of the apparatus <NUM> and/or the processing system <NUM> of the apparatus <NUM>' configured to perform the functions recited by the aforementioned means. As described supra, the processing system <NUM> may include the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM>. As such, in one configuration, the aforementioned means may be the TX MIMO processor <NUM>, the receive processor <NUM>, and/or the controller/processor <NUM> configured to perform the functions recited by the aforementioned means.

Claim 1:
A method of wireless communication performed by a user equipment, UE, comprising:
detecting (<NUM>) a wakeup signal;
determining (<NUM>) that the wakeup signal detected by the UE is associated with the UE based at least in part on the wakeup signal being for a UE group that includes the UE, wherein at least one of a portion of a UE group identifier associated with the UE group, or a portion of a cell identity associated with the UE group, is identified by a preamble of the wakeup signal, and wherein a scrambling sequence of the preamble is based, at least in part, on a system frame number, SFN, and one or more of the portion of the UE group identifier or the portion of the cell identity; and
receiving (<NUM>) a communication based at least in part on the wakeup signal.