Designed for transmitting and receiving signals carrying cell identification information for low-power wake-up receivers.

Abstract

A UE includes a transceiver having a first nominal operating power, a low-power wake-up receiver (LP-WUR) having a second nominal operating power less than the first nominal operating power, and a processor. The LP-WUR is configured to receive signals via an air interface. The processor is configured to extract cell identification information from the signals; and to use the cell identification information to perform at least one of the following: determining the identifier of the cell from which the signals are received, or distinguishing the signals from signals received from another cell.

Description

Technical Field

[0001] This application relates in its entirety to wireless communication systems, including systems, apparatus, and methods in which a user equipment (UE) may use a low-power (LP) wake-up receiver (LP-WUR) to monitor signals (e.g., LP wake-up signal (LP-WUS), LP synchronization signal (LP-SS), or a preamble for LP-WUS). Background Technology

[0002] Wireless mobile communication technologies use various standards and protocols to transmit data between network devices (e.g., base stations, radio heads, etc.) and wireless communication devices. Wireless communication system standards and protocols may include, for example, 3GPP Long Term Evolution (LTE) (e.g., 4G), 3GPP New Radio (NR) (e.g., 5G), and the IEEE 802.11 standard for Wireless Local Area Networks (WLANs) (often referred to as Wi-Fi within industry organizations). ® ).

[0003] As envisioned by 3GPP, different wireless communication system standards and protocols can use various radio access networks (RANs) for communication between RAN network equipment (sometimes collectively referred to as RAN nodes, network nodes, or simply nodes) and wireless communication equipment called UEs. 3GPP RANs can include, for example, Global System for Mobile Communications (GSM), Enhanced Data Rate GSM Evolution (EDGE) RAN (GERAN), Universal Terrestrial Radio Access Network (UTRAN), Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and / or Next Generation Radio Access Network (NG-RAN).

[0004] Each RAN can use one or more Radio Access Technologies (RATs) for communication between network devices and UEs. For example, GERAN implements the GSM and / or EDGE RAT, UTRAN implements the Universal Mobile Telecommunications System (UMTS) RAT or other 3GPP RATs, E-UTRAN implements the LTE RAT (sometimes simply referred to as LTE), and NG-RAN implements the NR RAT (sometimes referred to herein as the 5G RAT, 5G NR RAT, or simply NR). In some deployments, E-UTRAN may also implement the NR RAT. In some deployments, NG-RAN may also implement the LTE RAT.

[0005] The network equipment used in a RAN can correspond to that RAN. An example of E-UTRAN network equipment is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly referred to as Evolved Node B, Enhanced Node B, eNodeB, or eNB). An example of NG-RAN network equipment is a Next Generation Node B (sometimes also called gNodeB or gNB).

[0006] The RAN provides communication services to external entities through its connection with the core network (CN). For example, E-UTRAN can utilize the evolved packet core (EPC), while NG-RAN can utilize the 5G core network (5GC). Attached Figure Description

[0007] To facilitate the identification of any particular element or action in the discussion, one or more of the most significant digits in the figure reference numerals refer to the figure number in which the element was first introduced.

[0008] Figure 1 An example wireless communication system according to one or more aspects described herein is shown.

[0009] Figure 2 An example method of wireless communication performed by a UE according to one or more aspects described herein is shown.

[0010] Figure 3 An example signal payload according to one or more aspects described herein is shown, wherein cell identification information is spliced ​​with other parts of the payload.

[0011] Figure 4 An example method of wireless communication performed by a network device according to one or more aspects described herein is shown.

[0012] Figure 5 Example architectures of wireless communication systems based on one or more aspects described herein are illustrated.

[0013] Figure 6 An example system for performing signaling between a wireless device and a network device, according to one or more aspects described herein, is illustrated. Detailed Implementation

[0014] Various implementations are described with reference to user equipment (UE). However, references to UE are provided for illustrative purposes only. Example implementations can be used with any electronic component capable of establishing a connection to a network and configured with hardware, software, and / or firmware for exchanging information and data with the network. Therefore, the UE described herein is used to refer to any suitable electronic device (e.g., mobile phone, computer (e.g., laptop or tablet), wearable device (e.g., smartwatch, fitness device, or head-mounted device), or Internet of Things (IoT) device).

[0015] In some cases, the UE may include a low-power (LP) wake-up receiver (LP-WUR), and network equipment (e.g., a cell of a radio access network (RAN)) may transmit one or more signals via an air interface that are intended to be received by (or can be received by) the LP-WUR and can be decoded by the UE. These signals may include, for example, one or more of the following: an LP wake-up signal (LP-WUS), an LP synchronization signal (LP-SS), or a preamble for the LP-WUS.

[0016] In some cases, receiving a signal at the LP-WUR and determining that the signal is addressed to a UE or a group of UEs including the UE, may transition the receiver or transceiver of that UE (e.g., a receiver or transceiver consuming more power than the UE's LP-WUR (e.g., a main radio component consuming one or two or more orders of magnitude more power than the LP-WUR)) from a sleep state (e.g., a low-power state (which may or may not be a powered-off state)) to a wake-up state (e.g., full-power or normal operating mode).

[0017] In some cases, the UE may measure the signal to determine information about the cell or about the UE (e.g., its location), or the UE may receive information from the signal. In some cases, a UE including an LP-WUR may be a power-sensitive device, such as a small form factor device (e.g., an IoT device or a wearable device). In some cases, a non-power-sensitive device may include an LP-WUR.

[0018] In the 3GPP context, for UEs configured to operate in 3GPP NR mode, LP-WUR can be used in Radio Resource Control (RRC) idle mode or RRC inactive mode (RRC idle / inactive mode) and / or RRC connected mode.

[0019] Currently, it is unclear whether or how cell identification information is carried in signals intended for use with LP-WUR. By embedding cell identification information in signals intended for use with LP-WUR or associating cell identification information with such signals, a UE can, for example, identify the cell from which it transmits the signal (e.g., for detection, synchronization, or radio resource management (RRM) purposes) or randomize interference between different cells. This document describes the option of carrying cell identification information in LP-WUS, LP-SS, or the preamble used for LP-WUS.

[0020] In some implementations, cell identification information can be carried as part of the signal payload.

[0021] In some implementations, cell identification information can be used to scramble the signal payload.

[0022] In some implementations, and if a Cyclic Redundancy Check (CRC) is present, the CRC can be scrambled using cell identification information.

[0023] In some implementations, and if one or more payload bits are mapped to one or more time-domain or frequency-domain resource sequences during waveform generation, the cell identification information can be used as input for generating the sequence.

[0024] In some implementations, two or more of the above options may be combined. For any or all of the above options, the cell identification information may, for example, include the complete cell identifier (ID); a portion of the cell ID (i.e., a partial cell ID); or an identifier as a function of the cell ID.

[0025] Figure 1 An example wireless communication system 100 is illustrated. This wireless communication system may include a UE 102 connected over the air to a network (e.g., a 3GPP network). The UE 102 may communicate with the network on one or more uplink (UL) channels and one or more downlink (DL) channels, and more specifically, may communicate with one or more network devices of the RAN (e.g., network devices 104-1 and 104-2, which may take the form of one or more base stations, remote radio heads, etc.) on one or more UL channels and DL channels. Depending on the capabilities of the UE 102 and the network-configured settings of the UE, the UE 102 may communicate simultaneously, concurrently (e.g., in multiple-input multiple-output (MIMO) mode), or sequentially (e.g., during handover) with one or more network devices 104-1, 104-2.

[0026] In some cases, UE 102 can connect to one or both of the first network device 104-1 or the second network device 104-2 in Radio Resource Control (RRC) connected mode, RRC idle mode, or RRC inactive mode. In some cases, one or both of network devices 104-1 and 104-2 can be a neighboring cell of UE 102.

[0027] In some implementations, UE 102 may have both a primary radio unit (or transceiver) and an LP-WUR. When UE 102 has both a primary radio unit and an LP-WUR, the primary radio unit and the LP-WUR may be separate physical entities, or alternatively, the primary radio unit and the LP-WUR may share some or all of the physical structure and may be separate logical entities. For example, the transceiver may operate as a primary radio unit at one power level or as an LP-WUR at another power level; or the LP-WUR may be combined with additional physical structures to function as a primary radio unit. In some implementations, UE 102 may have only a primary radio unit or an LP-WUR. In implementations where UE 102 has an LP-WUR, UE 102 may use the LP-WUR to receive signals from a first network device 104-1, a second network device 104-2, and / or other network devices. Each signal can take the form of LP-WUS, LP-SS, a preamble for LP-WUS, or another type of signal intended to be received by (or can be received by) the LP-WUR.

[0028] In some cases, signals can be received using the LP-WUR when UE 102 is in RRC idle or inactive mode. Some signals (e.g., LP-WUS addressed to UE 102 or to a group of UEs including UE 102) can cause UE 102 to wake up the primary radio component in a low-power state. In some cases, signals can be received when UE 102 is in RRC connected mode. Because the LP-WUR can consume one or more orders of magnitude less power than the primary radio component, it can operate with negligible additional power consumption when the primary radio component is in use. In some implementations, the LP-WUR can be used for radio resource management (RRM) purposes to increase the throughput of the primary radio component, such as when using the LP-WUR would enable the primary radio component to avoid inducing measurement gaps and / or scheduling constraints.

[0029] Figure 2An example method 200 for wireless communication performed by a UE is illustrated. In one or more embodiments, method 200 supports one or more aspects of the low-power communication described herein. In some cases, the UE may be UE 102, wireless device 602, or one of the other UEs described herein. In some cases, method 200 may be executed by the processor of the UE, using a transceiver (e.g., a main radio component) of the UE having a first nominal operating power, an LP-WUR of the UE having a second nominal operating power less than the first nominal operating power, or other components of the UE. The transceiver and LP-WUR may be separate physical entities within the UE, or separate logical entities sharing or not sharing at least part of the physical structure. The LP-WUR may be configured to monitor and receive LP-WUS, LP-SS, or a preamble for LP-WUS via an air interface when the transceiver is in a low-power state. In some implementations, the LP-WUR can be configured to monitor and receive other signals, and / or monitor and receive signals when the transceiver is operating at or near its first nominal operating power.

[0030] At 202, method 200 may include receiving a signal from a cell corresponding to the known cell identification information (i.e., a signal received by the LP-WUR) using known cell identification information. The known cell identification information may be pre-programmed in the UE and / or received from the network via the transceiver or other methods.

[0031] As an alternative to 202, at 204, method 200 may include extracting cell identification information from the signal.

[0032] At 206, and regardless of whether the operations at 202 or 204 are performed, method 200 may include using known cell identification information or extracted cell identification information to perform at least one of the following: determining the identifier of the cell from which the signal is received, or distinguishing the signal from a signal received from another cell.

[0033] As described in the following paragraphs and elsewhere in this description, method 200 may be embodied, extended or modified in various ways.

[0034] In some cases, the cell identification information can be carried in the signal payload, either as part of the entire payload or as a component of it. This payload can be encoded and modulated in a manner similar to that used for other payloads. Figure 3 An example signal payload 300 is shown, in which cell identification information 302 is spliced ​​with other parts 304 and 306 of the payload 300. Although in Figure 3Cell identification information 302 is positioned between other portions 304 and 306 of the payload 300, but alternatively, cell identification information 302 may also be positioned at the beginning or end. In an embodiment where cell identification information is carried in the payload of the signal, method 200 may include extracting the cell identification information from the signal at 204 by extracting the cell identification information from the payload of the signal. In an embodiment where the payload includes other portions, method 200 may include extracting additional payload information from the signal (the additional payload information is concatenated with the cell identification information and includes at least one information bit or more information bits).

[0035] In some cases where the cell identification information is carried in the payload of the signal, method 200 may include determining that the signal is an LP-SS or a preamble for LP-WUS, and in response to the determination, identifying a predefined bit sequence in the additional payload information.

[0036] In some cases where the cell identification information is carried in the payload of the signal, method 200 may include determining that the signal is LP-WUS, and in response to the determination, identifying the UE identifier (UEID) or UE group identifier (ID) in the additional payload information, and determining whether the signal is intended for the UE based at least in part on the UE ID or the UE group ID.

[0037] In some cases, the LP-SS or the preamble for LP-WUS may carry more information than described above, such as the UE ID or UE group ID; however, the LP-SS or the preamble for LP-WUS is generally not intended to carry a payload (or a large portion of the payload) and may be limited to carrying only cell identification information, or only cell identification information and a predefined bit sequence. In some cases, LP-WUS may carry less information than described above and may carry only cell identification information, or only cell identification information and a predefined bit sequence; however, LP-WUS is generally configured to carry more information than the LP-SS or the preamble for LP-WUS. In some cases, the payload or a portion of the payload may include a bit sequence mapped to known cell identification information.

[0038] In some cases, a scrambling sequence can be used to scramble the payload of the signal. In these embodiments, method 200 may include determining a scrambling sequence for scrambling the payload by descrambling the payload at 204, and extracting cell identification information from the signal based at least in part on the scrambling sequence. Alternatively, the UE may use known cell identification information to descramble the payload (e.g., if known cell identification information can be used to descramble the payload, the signal may be considered to originate from a cell corresponding to the known cell identification information). For example, a scrambling sequence may be used. s(i) For payload a(i) Scrambling is performed, where the output b (i) Defined as:

[0039]

[0040] This output b(i) It can be encoded and modulated similarly to other payloads. In some implementations, the scrambling sequence... s(i) This can correspond to cell identification information known to the UE (e.g., mapped to the scrambling sequence). s(i) (Community signage information).

[0041] The scrambling sequence can directly or indirectly (e.g., mapped to) cell identification information. In some embodiments, the scrambling sequence can be generated at least partially based on the cell identification information. In some embodiments, the scrambling sequence can be a gold sequence. In some embodiments, the scrambling sequence can be a gold sequence, wherein the m-sequence component of the gold sequence has an initialization state dependent on the cell identification information. In some embodiments, the gold sequence length can be relatively small, such as 15 or 31 bits. The gold sequence length can depend on the size of the signal payload.

[0042] In some implementations, the scrambling sequence may depend on cell identification information and other factors, such as UE ID or UE group ID (e.g., the UE ID or UE group ID to which the signal is intended), or slot index or symbol index (e.g., the slot index or symbol index associated with the signal).

[0043] In some cases, the payload of the signal may include a Cyclic Redundancy Check (CRC) (e.g., a CRC appended to the payload), and the CRC may be scrambled using a scrambling sequence. In these embodiments, method 200 may include at 204 determining the scrambling sequence used to scramble the CRC by descrambling the CRC, and extracting the cell identification information from the signal based at least in part on the scrambling sequence. Alternatively, at 202, the UE may use known cell identification information to descramble the CRC (e.g., if the known cell identification information can be used to descramble the CRC, the signal may be considered to originate from the cell corresponding to the known cell identification information). For example, given a set of CRC bits... a(i) Given the cell identifier information b(i), the scrambled set of CRC bits c(i) can be defined as:

[0044]

[0045] After the CRC is descrambled, it can be used to extract valid messages from the cell corresponding to the known cell identification information (i.e., the cell identification information used to descramble the CRC).

[0046] In some implementations, the cell identification information used for the scrambling sequence may be a truncated set of bits from the cell identification information. For example, if the length of the cell identification information is longer than the length of the set of CRC bits, the cell identification information may be truncated (e.g., as the most significant bit (MSB) or as the least significant bit (LSB)). In some implementations, the scrambling sequence may also include padding bits in addition to the cell identification information. For example, if the length of the cell identification information is shorter than the length of the set of CRC bits, zero bits may be padded at the beginning or end of the scrambling sequence. Alternatively, cyclic expansion may be used to achieve the desired scrambling sequence length.

[0047] If bits of the payload in the signal received during waveform generation are mapped to one or more time-domain sequences and / or one or more frequency-domain sequences, cell identification information can be used as input for generating the sequence. In these embodiments, method 200 may include receiving an LP power signal at 202 by receiving at least one bit of the payload of the signal. This at least one bit may be mapped to a time-domain sequence (e.g., in an OOK-based waveform) and / or a frequency-domain sequence (e.g., in an Orthogonal Frequency Division Multiplexing (OFDM)-based waveform, or in OFDM-based waveform generation for OOK-based or Frequency Shift Keying (FSK)-based waveforms). Method 200 may also include extracting the cell identification information from the signal at 204, at least partially based on the one or more time-domain or frequency-domain sequences. Alternatively, method 200 may include receiving the signal using known information based on known cell identification information (e.g., known information about the correspondence between at least one time-domain sequence or at least one frequency-domain sequence and the cells corresponding to the known cell identification information).

[0048] If the time-domain or frequency-domain resource sequence is a Zadoff-Chu (ZC) sequence, the root sequence and / or cyclic shift can be selected based on cell identification information. If the time-domain or frequency-domain resource sequence is an m-sequence or a Gold sequence, the sequence can be selected based on cell identification information (e.g., similar to how a primary synchronization sequence (PSS) or secondary synchronization sequence (SSS) is generated for NR).

[0049] In some implementations, the time-domain or frequency-domain resource sequence may be scrambled (or additionally scrambled) by a scrambling sequence generated based on at least cell identification information.

[0050] The cell identification information carried in the signal, or used to scramble the signal, can take various forms. In some cases, the cell identification information may be or include the complete cell ID. In NR, there are 3 336 = 1008 cell IDs, which can be represented by ten (10) bits. In some cases, cell identification information may include only a portion of the cell ID (i.e., a partial cell ID). This partial cell ID may be the N most significant bits (MSB) or least significant bits (LSB) of the cell ID, or a component of the cell ID (e.g., a portion of the cell ID carried in the SSS in the NR, or a portion of the cell ID carried in the SSS in the NR). N(MSB or LSB). In some cases, the cell identification information may be a function of the cell ID or a function of a portion of the cell ID. For example, a hash function may be used to map a cell ID to a payload or bit sequence. When the cell identification information is a function of the cell ID, method 200 may include determining the cell ID (or a portion of the cell ID) included in the cell identification information by indexing a hash table using the cell identification information.

[0051] Figure 4 An example method 400 for wireless communication performed by a network device (e.g., a network device of a RAN) is illustrated. In one or more embodiments, method 400 supports one or more aspects of low-power communication as described herein. In some cases, the network device may be network device 104, network device 620, or one of the other network devices described herein. Method 400 may be performed using the processor, transceiver, or other components of the network device.

[0052] At 402, method 400 includes formatting a signal to carry cell identification information. This signal may be intended to be received by or be received by the UE's LP-WUR. By way of example, this signal may be LP-WUS, LP-SS, or a preamble for LP-WUS.

[0053] At 404, method 400 includes using the transceiver to send the signal over the air interface.

[0054] As described in the following paragraphs and elsewhere in this description, method 400 may be embodied, extended or modified in various ways.

[0055] In some cases, formatting the signal at 402 to carry cell identification information may include formatting the signal payload to carry that cell identification information. This cell identification information may be the entire payload or a part of it. The signal payload may be encoded and modulated similarly to other payloads. As discussed previously, Figure 3 An example signal payload 300 is shown, wherein cell identification information 302 is concatenated with other portions 304 and 306 of the payload 300. The signal payload 300 can be formatted in other ways, and the cell identification information can be formatted in other ways, such as, for example, referring to... Figure 2 Methods and Figure 3 The signal payload 300 is described.

[0056] In some cases, formatting the signal at 402 to carry cell identification information may include a payload for formatting the signal and scrambling that payload using a scrambling sequence. This scrambling sequence may be at least partially based on the cell identification information, such as, for example, referring to... Figure 2 The method described herein.

[0057] In some cases, formatting the signal at 402 to carry cell identification information may include formatting the signal's payload; generating a CRC against the payload; scrambling the CRC using a scrambling sequence; and appending the scrambled CRC to the payload. The scrambling sequence may be at least partially based on the cell identification information, such as, for example, referring to... Figure 2 The method described herein.

[0058] In some cases, formatting the signal at 402 to carry cell identification information may include mapping one or more bits of the signal's payload to at least one time-domain sequence or at least one frequency-domain sequence during waveform generation, and generating the sequence using the cell identification information as input. Further details regarding waveform generation are, for example, referenced in [reference missing]. Figure 2 The method is described.

[0059] The embodiments contemplated herein include one or more non-transitory computer-readable media storing instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 200 or 400. In the context of method 200, the non-transitory computer-readable medium may be, for example, the memory of a UE (such as memory 606 of wireless device 602 as a UE, as described herein). In the context of method 400, the non-transitory computer-readable medium may be, for example, the memory of a network device (such as memory 624 of network device 620, as described herein).

[0060] The embodiments contemplated herein include an apparatus having logic, modules, or circuitry for performing one or more elements of method 200 or 400. In the context of method 200, the apparatus may be, for example, a UE (such as wireless device 602 as a UE). In the context of method 400, the apparatus may be, for example, a network device (such as network device 620, as described herein).

[0061] The embodiments contemplated herein include a device having one or more processors and one or more computer-readable media, the device using or storing instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 200 or 400. In the context of method 200, the device may be, for example, a UE (such as wireless device 602 as a UE, as described herein). In the context of method 400, the device may be, for example, a network device (such as network device 620, as described herein).

[0062] The implementation schemes envisioned herein include signals as described in or associated with one or more elements of method 200 or 400.

[0063] The embodiments contemplated herein include a computer program or computer program product having instructions, wherein execution of the program by a processor causes the processor to perform one or more elements of method 200 or 400. In the context of method 200, the processor may be a processor of a UE (such as processor 604 of wireless device 602 as a UE, as described herein), and the instructions may be located, for example, in the processor and / or in the memory of the UE (such as memory 606 of wireless device 602 as a UE, as described herein). In the context of method 400, the processor may be a processor of a network device (such as processor 622 of network device 620, as described herein), and the instructions may be located, for example, in the processor and / or in the memory of the network device (such as memory 624 of network device 620, as described herein).

[0064] Figure 5 An example architecture of a wireless communication system according to the embodiments described herein is illustrated. The following description is provided for example wireless communication system 500, which operates in conjunction with LTE system standards or specifications and / or 5G or NR system standards or specifications as provided by 3GPP technical specifications.

[0065] As shown in the figure, the wireless communication system 500 includes UE 502 and UE 504 (although any number of UEs may be used). In this example, UE 502 and UE 504 are exemplified as smartphones (e.g., handheld touchscreen mobile computing devices that can connect to one or more cellular networks), but may also include any mobile or non-mobile computing device configured for wireless communication.

[0066] UE 502 and UE 504 can be configured to communicate with RAN 506. In implementations, RAN 506 can be NG-RAN, E-UTRAN, etc. UE 502 and UE 504 utilize connections (or channels) with RAN 506 (shown as connection 508 and connection 510, respectively), where each connection includes a physical communication interface. RAN 506 may include one or more network devices, such as base station 512 and base station 514, which implement connection 508 and connection 510.

[0067] In this example, Connection 508 and Connection 510 are air interfaces used to implement this type of communication coupling and can conform to the RAT used by RAN 506, such as LTE and / or NR, for example.

[0068] In some implementations, UE 502 and UE 504 may also exchange communication data directly via sidelink interface 516. UE 504 is shown configured to access an access point (shown as AP 518) via connection 520. By way of example, connection 520 may include a local wireless connection, such as a connection conforming to any IEEE 802.11 protocol, while AP 518 may include Wi-Fi. ® Router. In this example, AP 518 can be connected to another network (e.g., the Internet) without going through CN524.

[0069] In the implementation, UE 502 and UE 504 may be configured to communicate with each other or with base station 512 and / or base station 514 on a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals according to various communication technologies, such as but not limited to orthogonal frequency division multiple access (OFDMA) communication technology (e.g., for downlink communication) or single-carrier frequency division multiple access (SC-FDMA) communication technology (e.g., for uplink and ProSe or sidelink communication), although the scope of these implementations is not limited in this respect. The OFDM signal may include multiple orthogonal subcarriers.

[0070] In some implementations, all or part of base station 512 or base station 514 may be implemented as one or more software entities running on a server computer as part of a virtual network. Furthermore, or in other implementations, base station 512 or base station 514 may be configured to communicate with each other via interface 522. In implementations where wireless communication system 500 is an LTE system (e.g., when CN 524 is an EPC), interface 522 may be an X2 interface. This X2 interface may be defined between two or more network devices (e.g., two or more eNBs, etc.) connected to the EPC in the RAN and / or between two eNBs connected to the EPC. In implementations where wireless communication system 500 is an NR system (e.g., when CN 524 is a 5GC), interface 522 may be an Xn interface. This Xn interface is defined between two or more network devices (e.g., two or more gNBs, etc.) connected to the 5GC in the RAN, between a base station 512 (e.g., a gNB) connected to the 5GC and an eNB, and / or between two eNBs connected to the 5GC (e.g., CN 524).

[0071] RAN 506 is shown as communication-coupled to CN 524. CN 524 may include one or more network elements 526 configured to provide various data and telecommunications services to customers / subscribers (e.g., users of UE 502 and UE 504) connected to CN 524 via RAN 506. Components of CN 524 may be implemented in a single physical device or a separate physical device including components for reading and executing instructions from machine-readable or computer-readable media (e.g., non-transitory machine-readable storage media).

[0072] In the implementation scheme, CN 524 can be an EPC, and RAN 506 can be connected to CN 524 via S1 interface 528. In the implementation scheme, S1 interface 528 can be divided into two parts: an S1 user plane (S1-U) interface, which carries service data between base station 512 or base station 514 and the service gateway (S-GW); and an S1-MME interface, which is the signaling interface between base station 512 or base station 514 and the mobility management entity (MME).

[0073] In the implementation scheme, CN 524 may be a 5GC, and RAN 506 may be connected to CN 524 via NG interface 528. In the implementation scheme, NG interface 528 may be divided into two parts: an NG user plane (NG-U) interface, which carries service data between base station 512 or base station 514 and user plane function (UPF); and an S1 control plane (NG-C) interface, which is the signaling interface between base station 512 or base station 514 and access and mobility management function (AMF).

[0074] Generally, application server 530 can be an element that provides Internet Protocol (IP) bearer resources (e.g., packet-switched data services) for use with CN 524. Application server 530 can also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for UE 502 and UE 504 via CN 524. Application server 530 can communicate with CN 524 via IP communication interface 532.

[0075] Figure 6 An example system 600 for performing signaling 638 between a wireless device 602 and a network device 620 according to an embodiment described herein is illustrated. System 600 may be part of a wireless communication system as described herein. Wireless device 602 may be, for example, a UE of a wireless communication system. Network device 620 may be, for example, a base station (e.g., an eNB or gNB) or a radio headend of a wireless communication system.

[0076] Wireless device 602 may include one or more processors 604. Processor 604 may execute instructions that cause various operations of wireless device 602 to be performed as described herein. Processor 604 may include one or more baseband processors, which may be implemented using, for example, a central processing unit (CPU), digital signal processor (DSP), application-specific integrated circuit (ASIC), controller, field-programmable gate array (FPGA) device, another hardware device, firmware device, or any combination thereof configured to perform the operations described herein.

[0077] Wireless device 602 may include memory 606. Memory 606 may be a non-transitory computer-readable storage medium that stores instructions 608, which may include, for example, instructions executed by processor 604. Instructions 608 may also be referred to as program code or a computer program. Memory 606 may also store data used by processor 604 and results calculated by the processor.

[0078] Wireless device 602 may include one or more transceivers 610 (also collectively referred to as transceiver 610), which may include radio frequency (RF) transmitter and / or receiver circuitry that uses antenna 612 of wireless device 602 to facilitate to-and / or from-wireless device 602 signaling (e.g., signaling 638) according to a corresponding RAT. Wireless device 602 may also include LP-WUR 614 that enables wireless device 602 to use antenna 612 to detect and / or measure LP-WUS received from one or more other devices.

[0079] Wireless device 602 may include one or more antennas 612 (e.g., one, two, four, eight, or more). In embodiments with multiple antennas 612, wireless device 602 can fully utilize the spatial diversity of such multiple antennas 612 to transmit and / or receive multiple different data streams on the same time-frequency resources. This behavior may be referred to as, for example, MIMO behavior (referring to multiple antennas used at each of the transmitting and receiving devices to implement this aspect). MIMO transmission by wireless device 602 can be implemented according to pre-decoding (or digital beamforming) applied to wireless device 602, which multiplexes the data streams among antennas 612 based on known or assumed channel characteristics, such that each data stream is received with appropriate signal strength relative to the others at a desired location in the spatial domain (e.g., the location of the receiver associated with that data stream). Some embodiments may use a single-user MIMO (SU-MIMO) method (where all data streams are directed to a single receiver) and / or a multi-user MIMO (MU-MIMO) method (where individual data streams may be directed to individual (different) receivers at different locations in the spatial domain).

[0080] In some implementations with multiple antennas, wireless device 602 can implement analog beamforming technology, whereby the phase of the signal transmitted by antenna 612 is relatively adjusted so that the (joint) transmission of antenna 612 can be directed (this is sometimes referred to as beam control).

[0081] Wireless device 602 may include one or more interfaces 616. Interfaces 616 can be used to provide input to or output to wireless device 602. For example, wireless device 602 as a UE may include interfaces 616, such as microphones, speakers, touchscreens, buttons, etc., to allow input and / or output from a user of the UE to the UE. Other interfaces of such a UE may consist of transmitters, receivers, and other circuitry (e.g., in addition to the transceiver 610 / antenna 612 already described), which allow communication between the UE and other devices and can be configured according to known protocols (e.g., Wi-Fi). ® ,Bluetooth ® (etc.) to perform the operation.

[0082] Wireless device 602 may include signal processing module 618. Signal processing module 618 may be implemented via hardware, software, or a combination thereof. For example, signal processing module 618 may be implemented as a processor, circuitry, and / or instructions 608 stored in memory 606 and executed by processor 604. In some examples, signal processing module 618 may be integrated within processor 604 and / or transceiver 610. For example, signal processing module 618 may be implemented via a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within processor 604 or transceiver 610.

[0083] From the perspective of a wireless device or UE, the signal processing module 618 can be used in various aspects of this disclosure, for example, Figures 1 to 4 In all aspects. The signal processing module 618 can be configured, for example, to receive signals from the network device 620 (or other network device) using an LP-WUR 614, and extract cell identification information from the signals.

[0084] Network device 620 may include one or more processors 622. Processor 622 is executable instructions that cause various operations of network device 620 to be performed as described herein. Processor 622 may include one or more baseband processors, which are implemented using, for example, a CPU, DSP, ASIC, controller, FPGA device, another hardware device, firmware device, or any combination thereof configured to perform the operations described herein.

[0085] Network device 620 may include memory 624. Memory 624 may be a non-transitory computer-readable storage medium that stores instructions 626, which may include, for example, instructions executed by processor 622. Instructions 626 may also be referred to as program code or a computer program. Memory 624 may also store data used by processor 622 and results calculated by the processor.

[0086] Network device 620 may include one or more transceivers 628 (also collectively referred to as transceiver 628), which may include RF transmitter and / or receiver circuitry that uses the antenna 630 of network device 620 to facilitate to-and / or from-network device 620 signaling (e.g., signaling 638) in accordance with the corresponding RAT.

[0087] Network device 620 may include one or more antennas 630 (e.g., one, two, four or more). In embodiments having multiple antennas 630, network device 620 may perform MIMO, digital beamforming, analog beamforming, beam control, etc., as described.

[0088] Network device 620 may include one or more interfaces 632. Interface 632 can be used to provide input to or output to network device 620. For example, RAN network device 620 (e.g., base station, radio head, etc.) may include interfaces 632 consisting of transmitters, receivers, and other circuitry (e.g., in addition to the transceiver 628 / antenna 630 already described), which enable network device 620 to communicate with other equipment in the network and / or enable network device 620 to communicate with external networks, computers, databases, etc., for the purpose of operating, managing, and maintaining network device 620 or other equipment operatively connected to it.

[0089] Network device 620 may include one or more signal formatting modules 634. Signal formatting modules 634 may be implemented via hardware, software, or a combination thereof. For example, signal formatting module 634 may be implemented as a processor, circuitry, and / or instructions 626 stored in memory 624 and executed by processor 622. In some examples, signal formatting module 634 may be integrated within processor 622 and / or transceiver 628. For example, signal formatting module 634 may be implemented via a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within processor 622 or transceiver 628.

[0090] From the perspective of network devices, the signal formatting module 634 can be used in various aspects of this disclosure, for example, Figures 1 to 4 In all aspects. The signal formatting module 634 can be configured, for example, to format the signal to carry cell identification information. The processor 622 can then use the transceiver 628 and antenna 630 to transmit the signal (to the wireless device 602, to one or more other wireless devices, or in broadcast mode).

[0091] For one or more embodiments, at least one of the components illustrated in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as set forth herein. For example, a baseband processor (or processor) as described herein in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples presented herein. Similarly, circuitry associated with a UE, network device, network element, etc., as described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples presented herein.

[0092] Unless otherwise expressly stated, any of the embodiments described above may be combined with any other embodiments (or combinations thereof). The foregoing description of one or more specific embodiments provides illustrative and descriptive qualities, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise forms described. In light of the teachings above, modifications and variations are possible, or modifications and variations may be derived from the practice of various embodiments.

[0093] Implementations and specific embodiments of the systems and methods described herein may include various operations embodied in machine-executable instructions to be executed by a computer system. The computer system may include one or more general-purpose or special-purpose computers (or other electronic devices). The computer system may include hardware components, including specific logical units for performing the operations; or may include a combination of hardware, software, and / or firmware.

[0094] The systems described herein relate to specific implementations but are provided as examples. These implementations may be combined into a single system, partially integrated into other systems, divided into multiple systems, or otherwise partitioned or combined. Furthermore, it is conceivable to use parameters, attributes, aspects, etc., of one implementation in one implementation. For clarity, these parameters, attributes, aspects, etc., are described only in one or more implementations, and it should be understood that, unless expressly stated herein, these parameters, attributes, aspects, etc., may be combined with or substituted for parameters, attributes, aspects, etc., of another implementation.

[0095] As is widely recognized, the use of personally identifiable information should comply with privacy policies and practices that are generally accepted to meet or exceed industry or governmental requirements for protecting user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of any permitted use should be clearly explained to the user.

[0096] Although the foregoing has been described in considerable detail for clarity, it will be apparent that changes and modifications can be made without departing from the principles of the invention. It should be noted that many alternative ways exist to implement both the processes and apparatus described herein. Therefore, embodiments of the invention should be considered illustrative rather than restrictive, and this specification is not limited to the details given herein, but can be modified within the scope and equivalents of the appended claims.

Claims

1. A user equipment (UE), the user equipment (UE) comprising: A transceiver having a first nominal operating power; A low-power (LP) wake-up receiver (LP-WUR) having a second nominal operating power less than the first nominal operating power, the LP-WUR being configured to receive signals via an air interface; as well as Processor, the processor being configured to: The signal is received from the cell corresponding to the known cell identification information using known cell identification information; or Extract cell identification information from the signal; and The known cell identification information or the extracted cell identification information is used to perform at least one of the following: determining the identifier of the cell from which the signal is received, or distinguishing the signal from a signal received from another cell.

2. The UE of claim 1, wherein the processor is configured to extract the cell identification information from the signal by extracting the cell identification information from the payload of the signal.

3. The UE according to claim 2, wherein, In addition to the cell identification information, the processor also extracts additional payload information from the signal, and the additional payload information is concatenated with the cell identification information.

4. The UE according to claim 3, wherein: The processor determines that the signal is an LP synchronization signal (LP-SS) or a preamble for an LP wake-up signal (LP-WUS); and The processor is configured to identify a predefined bit sequence in the additional payload information in response to determining that the signal is LP-SS or a preamble for LP-WUS.

5. The UE according to claim 2, wherein: The processor determines that the signal is an LP wake-up signal (LP-WUS); and The processor is configured to respond to determining that the signal is LP-WUS. The UE identifier (UE ID) or UE group identifier (ID) in the additional payload information is identified; and Whether the signal is intended for the UE is determined at least in part based on the UE ID or the UE group ID.

6. The UE according to claim 1, wherein: The processor is configured to receive the signal from the cell corresponding to the known cell identification information using the known cell identification information in the following manner: The known cell identification information is used to descramble the payload of the signal.

7. The UE according to claim 6, wherein the scrambling sequence is a Gold sequence.

8. The UE according to claim 7, wherein the m-sequence of the Gold sequence has an initialization state that depends on the cell identifier information.

9. The UE of claim 6, wherein the scrambling sequence is based on the cell identification information and at least one of the following: UE identifier (UE ID); UE group identifier (ID); Time slot index; or Symbol index.

10. The UE according to claim 1, wherein: The processor is configured to receive the signal from the cell corresponding to the known cell identification information using the known cell identification information in the following manner: The known cell identification information is used to descramble the Cyclic Redundancy Check (CRC) of the payload attached to the signal; and After descrambling the CRC, and using the CRC, a valid message received from the cell corresponding to the known cell identification information is extracted from the signal.

11. The UE of claim 10, wherein the scrambling sequence is a truncated set of bits of cell identification information.

12. The UE according to claim 10, wherein the scrambling sequence includes padding bits in addition to the cell identifier information.

13. The UE according to claim 1, wherein: The LP-WUR is configured as follows: The signal is received by receiving at least one bit of the signal's payload, the at least one bit being mapped to at least one time-domain sequence or at least one frequency-domain sequence; and The processor is configured to: The signal is received using known information relating the at least one time-domain sequence or the at least one frequency-domain sequence to the cell corresponding to the known cell identifier information; or The cell identification information is extracted based at least in part on time-domain resource sequences or frequency-domain resource sequences.

14. The UE according to claim 13, wherein the time-domain resource sequence or the frequency-domain resource sequence is a Zadoff-Chu (ZC) sequence, an m-sequence, or a Gold sequence.

15. The UE according to claim 1, wherein the cell identification information includes a complete cell identifier (ID).

16. The UE according to claim 1, wherein the cell identification information includes a portion of the cell identifier (ID).

17. The UE of claim 1, wherein the processor is configured to determine the cell identifier (ID) included in the cell identifier information by indexing the hash table using the cell identifier information.

18. A method for a user equipment (UE), the method comprising: Signals are received via the air interface using a low-power (LP) wake-up receiver (LP-WUR) having a power lower than the nominal operating power of the UE's main radio component; as well as The signal is received from the cell corresponding to the known cell identification information using known cell identification information; or Extracting cell identification information from the signal, and using the cell identification information to perform at least one of the following: Determine the identifier of the cell from which the signal is received; or The signal is distinguished from the signal received from another cell.

19. A network device, the network device comprising: transceiver; Processor, the processor being configured to: The signal is formatted to carry cell identification information and is intended to be received by the user equipment's (UE) low-power (LP) wake-up receiver (LP-WUR); and The transceiver is used to transmit the signal via the air interface.

20. The network device according to claim 18, wherein: The processor is configured to format the signal to carry cell identification information by scrambling the payload of the signal using a scrambling sequence, the scrambling sequence being at least partially based on the cell identification information.

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