Devices, methods, and systems for low power wakeup signaling

Abstract

The invention relates to low power wakeup signaling for wireless communication. The network device is configured to generate a low power wakeup signal (LP-WUS) and send the LP-WUS to one or more user devices. The LP-WUS includes activation information and / or deactivation information for activating or deactivating one or more resource allocations. In response to receiving the LP-WUS, the user equipment in a power saving mode (or sleep mode) is used to wake up and activate or deactivate one or more resource allocations for communication. The resource allocation may be semi-statically configured by semi-static scheduling (SPS). Thereby, coexistence of LP-WUS monitoring with pre-configured resource allocations (e.g., SPS allocations) is coordinated. The power consumption of the user equipment can be reduced, and the service delay is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to the field of communication technology. For example, the present disclosure provides devices, methods, and systems for low-power wake-up signaling. BACKGROUND

[0002] Power consumption is critical for wireless communication, especially for wearable devices and Internet-of-Things (IoT) devices. To optimize power consumption, the 3rd Generation Partnership Project (3GPP) supports connected mode discontinuous reception (CDRX) for user equipment (UE) in New Radio (NR) Release 15, in which the UE periodically monitors the physical downlink control channel (PDCCH) using one or more monitoring patterns defined by the network during the active time of CDRX. In 3GPP NR Release 16, to further optimize power consumption, DCI with CRC scrambled by PS-RNTI (DCP) is introduced. To this end, DCI format 2_6 is introduced, and the UE monitors DCP outside the active time of CDRX. 3GPP NR standard Release 17 supports scheduling DCI to indicate PDCCH skipping or search space set group (SSSG) switching. PDCCH skipping is used to indicate not monitoring PDCCH for a short period of time (i.e., skipping duration). SSSG switching indicates the SSSG that should be used for PDCCH monitoring, so that the UE no longer needs to search the entire space.

[0003] For 3GPP NR Rel-18 and beyond, a new mechanism called low-power wake-up signal (LP-WUS) is being studied. When there is no traffic, a communication terminal can configure most of the components in its main radio into sleep mode and only turn on its low-power wake-up receiver (LP-WUR or LP-WuRx). The power consumption of LP-WUR is much lower than that of the main radio. LP-WUS can be a dedicated signal designed to be detected by LP-WUR, so that the communication terminal can also be used to wake up its main radio for wireless communication. It should be noted that LP-WUS is different from the "WUS" indicated by DCI format 2_6. For example, unlike the wake-up indication carried by DCI format 2_6, LP-WUS can be transmitted through a dedicated channel and / or using a dedicated modulation. SUMMARY

[0004] In 3GPP NR, there are still problems in how to integrate LP-WUS with other energy-saving technologies. For example, the content of LP-WUS has not been defined. In addition, it is not clear how to reduce the latency when using LP-WUS to wake up the UE in the case of emergency traffic. Generally, when the UE (e.g., its wake-up receiver) detects the LP-WUS, the UE should activate its main radio components. Then, the main radio starts monitoring the PDCCH for UL / DL scheduling. However, this process is still long and can cause significant delay for latency-sensitive traffic such as ultra-reliable low-latency communications (URLLC) and extended reality (XR).

[0005] Semi-Persistent Scheduling (SPS) is configured by RRC signaling. SPS can be configured for each serving cell per BWP. Multiple assignments can be activated simultaneously in the same BWP. Activation and deactivation of SPS can be independent between serving cells. For DL SPS, DL assignments are provided by PDCCH and stored or flushed based on L1 signaling indicating SPS activation or deactivation. When SPS is configured, the following parameters can be configured by RRC signaling:

[0006] -cs-RNTI: CS-RNTI for activation, deactivation, and retransmission;

[0007] -nrofHARQ-Processes: number of HARQ processes configured for SPS;

[0008] -harq-ProcID-Offset: HARQ process offset for SPS;

[0009] -periodicity: The period for downlink allocation configured for SPS.

[0010] After configuring downlink allocation for SPS, the MAC entity can sequentially assume that the Nth downlink allocation occurs in the following time slots:

[0011] (number_Of_Slots_Per_Frame × SFN + number of slots in the frame) = [(number_Of_Slots_Per_Frame × SFN start time + slot start time) + N × period × number_Of_Slots_Per_Frame / 10] modulo (1024 × number_Of_Slots_Per_Frame)

[0012] The SFN start time and the timeslot start time are the SFN and timeslot during the first PDSCH transmission, respectively, and the configured downlink allocation is (re)initialized.

[0013] When the upper layer releases the SPS, all corresponding configurations should be released.

[0014] There are still issues with how to integrate LP-WUS with pre-configured resource allocation (such as SPS).

[0015] In view of the aforementioned problems and shortcomings, this disclosure aims to improve the LP-WUS mechanism. For example, one objective may be to reduce the latency of waking up communication terminals using LP-WUS. Another objective may be to further optimize the LP-WUS implementation, for example, the coexistence of LP-WUS monitoring and resource allocation (such as SPS).

[0016] These and other objectives are achieved through this disclosure, for example, as described in the independent claims. Advantageous implementations are further described in the dependent claims.

[0017] A first aspect of this disclosure provides a network device for wireless communication. The network device is used to generate an LP-WUS. The LP-WUS includes activation or deactivation information for activating or deactivating one or more resource allocations. The network device is also used to transmit the LP-WUS to one or more user equipments.

[0018] In this disclosure, the activation information or deactivation information used to activate or deactivate one or more resource allocations may be simply referred to as (de)activation information. It should be noted that activation information and deactivation information for different user devices can be combined in LP-WUS. That is, LP-WUS may include activation information and / or deactivation information.

[0019] By sending an LP-WUS that includes the (de)activation information, any UE receiving the LP-WUS can promptly (e.g., upon receiving the LP-WUS) activate or deactivate the one or more resource allocations accordingly, without any other signaling. In other words, no signaling is involved other than the LP-WUS for activating or deactivating the one or more resource allocations. This reduces latency.

[0020] In one implementation of the first aspect, the network device can also be used to activate or deactivate the one or more resource allocations based on the activation information or deactivation information.

[0021] Optionally, activating the one or more resource allocations may refer to using the resources indicated by the one or more resource allocations to perform DL communication and / or UL communication with one or more UEs. Deactivating the one or more resource allocations may refer to not using the resources indicated by the one or more resource allocations.

[0022] It should be noted that the network device's activation or deactivation of the one or more resource allocations based on the activation or deactivation information is optional, not mandatory, because at least the following situations are possible:

[0023] -Scenario 1: The network device is used to send the LP-WUS and accordingly (de)activate the one or more resource allocations;

[0024] -Scenario 2: The first network device (as described in the first aspect) is used to send the LP-WUS, and the second network device is used to (de)activate the one or more resource allocations;

[0025] -Scenario 3: The network device is used to send the LP-WUS to the first UE, and the second UE is used to (de)activate the one or more resource allocations to communicate with the first UE.

[0026] In scenario 2, the first network device may be associated with a primary cell (PCell), and the second network device may be associated with a secondary cell (SCell). Scenario 3 can be applied to device-to-device (D2D) communication (e.g., V2X communication), where the first UE and the second UE can communicate directly with each other.

[0027] In another implementation of the first aspect, the activation information or deactivation information may include flag information indicating whether the resource allocation is activated or deactivated for each user device.

[0028] Optionally, for each user device, the flag information may include a flag indicating whether the corresponding resource allocation is activated or deactivated.

[0029] In another implementation of the first aspect, the activation information or deactivation information may include resource indication information, which indicates the one or more resource allocations to be activated or deactivated.

[0030] In another implementation of the first aspect, prior to generating the LP-WUS, the network device may be used to send LP-WUS configuration information to the one or more user equipments. The LP-WUS configuration information indicates one or more default resource allocations to be activated or deactivated for the one or more resource allocations.

[0031] In other words, when the LP-WUS is received by default (e.g., when the LP-WUS does not include the resource indication information), the one or more default resource allocations are to be activated or deactivated. If the LP-WUS includes the resource indication information, which indicates one or more specific resource allocations to be activated or deactivated, then the one or more specific resource allocations override the one or more default resource allocations.

[0032] In another implementation of the first aspect, prior to generating the LP-WUS, the network device may be used to send one or more resource configurations to the one or more user equipments. Each resource configuration indicates multiple pre-configured resource allocations. The one or more resource allocations (to be activated or deactivated) belong to the multiple pre-configured resource allocations.

[0033] Optionally, the one or more user equipments may share a common resource configuration. Therefore, the network device can be used to send the common resource configuration to the one or more user equipments. Alternatively, the one or more user equipments may each be configured with a dedicated resource configuration. Therefore, the network device can be used to send a dedicated resource configuration to each user equipment. This disclosure does not impose any limitations on this.

[0034] In another implementation of the first aspect, the one or more resource configurations may include one or more SPS configurations. Each SPS configuration indicates a plurality of semi-static resource allocations as the plurality of pre-configured resource allocations.

[0035] A second aspect of this disclosure provides a user equipment for wireless communication. The user equipment is configured to receive LP-WUS from a network device. The LP-WUS includes activation information or deactivation information (specifically for the user equipment). The user equipment is further configured to activate or deactivate one or more resource allocations based on the activation information or deactivation information.

[0036] Optionally, activating the one or more resource allocations may refer to using the one or more resource allocations to communicate with another device (e.g., DL communication and / or UL communication and / or D2D communication). The other device may be the network device transmitting the LP-WUS, another network device, or another user equipment. Deactivating the one or more resource allocations may refer to not using the resources indicated by the one or more resource allocations.

[0037] In one implementation of the second aspect, the activation information or deactivation information may include flag information indicating whether the user equipment is activated or deactivated, corresponding to the resource allocation.

[0038] In another implementation of the second aspect, the activation information or deactivation information may include resource indication information, which indicates the one or more resource allocations to be activated or deactivated.

[0039] In another implementation of the second aspect, the user equipment may receive LP-WUS configuration information from the network device before receiving the LP-WUS. The LP-WUS configuration information indicates one or more default resource allocations to be activated or deactivated for the one or more resource allocations.

[0040] In another implementation of the second aspect, the user equipment may be configured to receive resource configuration from the network device before receiving the LP-WUS. The resource configuration indicates a plurality of pre-configured resource allocations, wherein one or more resource allocations belong to the plurality of pre-configured resource allocations.

[0041] In another implementation of the second aspect, the one or more resource configurations may include one or more SPS configurations. Each SPS configuration indicates a plurality of semi-static resource allocations as the plurality of pre-configured resource allocations.

[0042] The user equipment in the second aspect can share the corresponding optional features and achieve the same advantages as the network equipment in the first aspect.

[0043] A third aspect of this disclosure provides a system. The system includes at least one network device according to the first aspect or any implementation thereof, and one or more user devices according to the second aspect or any implementation thereof.

[0044] A fourth aspect of this disclosure provides a method for wireless communication. The method includes the following steps:

[0045] - The network device generates a low-power wake-up signal (LP-WUS), wherein the LP-WUS includes activation information or deactivation information for activating or deactivating one or more resource allocations;

[0046] - The network device sends the LP-WUS to one or more user equipments.

[0047] In one implementation of the fourth aspect, the method may further include: the network device activating or deactivating the one or more resource allocations based on the activation information or deactivation information.

[0048] In another implementation of the fourth aspect, the activation information or deactivation information may include flag information indicating whether the resource allocation is activated or deactivated for each user device.

[0049] In another implementation of the fourth aspect, the activation or deactivation information may include resource indication information, which indicates the one or more resource allocations to be activated or deactivated.

[0050] In another implementation of the fourth aspect, before generating the LP-WUS, the method may further include: the network device sending LP-WUS configuration information to the one or more user equipments. The LP-WUS configuration information indicates one or more default resource allocations as to be activated or deactivated for the one or more resource allocations.

[0051] In another implementation of the fourth aspect, before generating the LP-WUS, the method may further include: the network device sending one or more resource configurations to the one or more user equipments. Each resource configuration indicates multiple pre-configured resource allocations. The one or more resource allocations (to be activated or deactivated) belong to the multiple pre-configured resource allocations.

[0052] In another implementation of the fourth aspect, the one or more resource configurations may include one or more SPS configurations. Each SPS configuration indicates a plurality of semi-static resource allocations as the plurality of pre-configured resource allocations.

[0053] The fourth approach can share the same optional features and advantages as the network devices of the first approach.

[0054] The fifth aspect of this disclosure provides a method for wireless communication. The method includes the following steps:

[0055] - The user equipment receives a low-power wake-up signal (LP-WUS) from the network device, wherein the LP-WUS includes activation information or deactivation information;

[0056] The user equipment activates or deactivates one or more resource allocations based on the activation information or deactivation information.

[0057] In one implementation of the fifth aspect, the activation information or deactivation information may include flag information indicating whether the user equipment is activated or deactivated, corresponding to the resource allocation.

[0058] In another implementation of the fifth aspect, the activation or deactivation information may include resource indication information, which indicates the one or more resource allocations to be activated or deactivated.

[0059] In another implementation of the fifth aspect, before receiving the LP-WUS, the method may further include: the user equipment receiving LP-WUS configuration information from the network device. The LP-WUS configuration information indicates one or more default resource allocations as to be activated or deactivated for the one or more resource allocations.

[0060] In another implementation of the fifth aspect, before receiving the LP-WUS, the method may further include: the user equipment receiving a resource configuration from the network device. The resource configuration indicates a plurality of pre-configured resource allocations, wherein one or more resource allocations belong to the plurality of pre-configured resource allocations.

[0061] In another implementation of the fifth aspect, the one or more resource configurations may include one or more SPS configurations. Each SPS configuration indicates a plurality of semi-static resource allocations as the plurality of pre-configured resource allocations.

[0062] The fifth aspect of the approach can share the same optional features and advantages as the user equipment of the second aspect.

[0063] A sixth aspect of this disclosure provides a computer program including program code for performing the method described in accordance with the fourth aspect or any implementation thereof.

[0064] The seventh aspect of this disclosure provides a computer program including program code for performing the method described in accordance with the fifth aspect or any implementation thereof.

[0065] The eighth aspect of this disclosure provides a non-transitory storage medium for storing executable program code, which, when executed by a processor (or chipset), causes the method described according to the fourth aspect or any implementation thereof to be performed.

[0066] The ninth aspect of this disclosure provides a non-transitory storage medium for storing executable program code, which, when executed by a processor (or chipset), causes the method described according to the fifth aspect or any implementation thereof to be performed.

[0067] It should be noted that all devices, elements, units, and components described in this application can be implemented in software or hardware elements or any combination thereof. All steps performed by the various entities described in this application, and the functional intent described as being performed by the various entities, indicate that the respective entities are suitable for or intended to perform the respective steps and functions. Although specific functions or steps to be performed by external entities are not reflected in the detailed description of the specific elements of the entity performing those specific steps or functions in the following description of this disclosure, those skilled in the art will understand that these methods and functions can be implemented by the corresponding software or hardware elements or any combination thereof. Attached Figure Description

[0068] The following description, in conjunction with the accompanying drawings, illustrates the above aspects and implementation methods, as shown in the drawings:

[0069] Figure 1 Examples of user equipment 110 and network equipment 120 according to this disclosure are shown;

[0070] Figure 2 A schematic diagram of a possible structure for LP-WUS is shown;

[0071] Figure 3A and Figure 3BAn example of SPS and LP-WUS monitoring coexisting is shown;

[0072] Figure 4A and Figure 4A Other examples of SPS and LP-WUS monitoring coexisting are shown;

[0073] Figure 5 A schematic diagram of a method according to the present disclosure is shown;

[0074] Figure 6 A schematic diagram of another method according to this disclosure is shown. Detailed Implementation

[0075] The following is a list of key terms and their abbreviations / abbreviations used in this disclosure: 3rd Generation Partnership Project – Base Station – Connected-mode discontinuous reception – ;ConfiguredGrant – Downlink Control Information – Dynamic Grant – Downlink – Discontinuous Reception – Discontinuous transmission – gNodeB– Hybrid Automatic Repeat Request – Low Power Wake Up Signal – Low Power Wake Up Receiver – NewRadio – Modulation and Coding Scheme – Physical Downlink Control Channel – Physical Downlink Shared Channel – Energy saving – Physical Random Access Channel – Radio Network Temporary Identifier – Cell RNTI – Paging RNTI – Random Access – Radio Resource Control – Search Space Set Group – Semi-Persistent Scheduling – Scheduling Request – Uplink Control Information – Uplink – Ultra-Reliable Low Latency Communications – User Equipment – Extended Reality – .

[0076] This disclosure provides improvements for implementing low-power wake-up signaling in wireless communications.

[0077] Figure 1 Examples of user equipment 110 and network equipment 120 according to this disclosure are shown. User equipment 110 and network equipment 120 may constitute communication system 100. For example, communication system 100 may be a 5G / 6G mobile communication system or any other communication system. In this disclosure, user equipment 110 may be referred to as UE 110 and network equipment 120 may be referred to as BS 120.

[0078] To reduce power consumption, UE 110 may include a low-power wake-up receiver (LP-WUR) 111 and at least one main radio unit 112. The LP-WUR 111 may also be an ultra-low-power wake-up receiver, etc. When not communicating with BS 120, UE 110 may be in a low-power mode (or sleep mode). That is, UE 110 may adjust to shut down most of its main radio unit 112 and monitor LP-WUS 101 via its LP-WUR 111. LP-WUS 101 may be a signal detectable by UE 110 (e.g., via its LP-WUR 111). LP-WUR 111 requires relatively low power to remain operational. Thus, UE 110 can reduce power consumption. If UE 110 detects LP-WUS 101 (e.g., via LP-WUR 111), UE 110 may adjust to turn on its main radio unit 112 to communicate.

[0079] In this disclosure, BS 120 generates LP-WUS 101 and sends LP-WUS 101 to UE 110. LP-WUS 101 includes activation information or deactivation information for activating or deactivating one or more resource allocations of the UE. BS 120 may also send LP-WUS 101 to multiple UEs. In this case, LP-WUS 101 may include activation information and / or deactivation information for activating and / or deactivating one or more resource allocations of multiple UEs.

[0080] Upon receiving LP-WUS 101, UE 110 activates or deactivates one or more resource allocations based on the activation or deactivation information contained in LP-WUS 101. Therefore, UE 110 does not need to continuously monitor the PDCCH while monitoring LP-WUS 101. UE 110 also does not need to look up scheduling information after being woken up by LP-WUS 101. Instead, UE 110 can directly use one or more activated resource allocations for communication. This reduces latency. When deactivation is indicated, UE 110 also knows explicitly that it does not need to be woken up and can remain in sleep mode. This reduces power consumption.

[0081] Optionally, the activation or deactivation information may include flag information indicating whether the resource allocation is activated or deactivated for each UE.

[0082] Optionally, when multiple UEs 110 exist, BS 120 can generate a common LP-WUS and broadcast it to all UEs that need to receive the notification. For example, when multiple UEs exist, LP-WUS 101 can include a flag (e.g., "1" or "0") indicating whether the resource allocation is active or deactivated for each UE. For example, LP-WUS 101 can include a 3-bit field "100" to indicate that the resource allocation is active for the first UE (UE #1) and not for the second or third UE (UE #2 or UE #3).

[0083] Optionally, before generating LP-WUS, BS 120 can provide index information to each UE 120. This index information is used by each UE to index the corresponding flag information. Optionally, BS 120 can provide size information of the flag information to each UE. The index information and optional size information can be provided via RRC signaling. For example, BS 120 can indicate via RRC signaling that UE #1 corresponds to index #1, UE #2 corresponds to index #2, and UE #3 corresponds to index #3.

[0084] Alternatively, each flag in the corresponding location (or field) can be mapped to (or associated with) the corresponding UE identifier, allowing each UE to recognize its own flag. For example, activation and / or deactivation information can be scrambled using the UE identifier.

[0085] It should be noted that any method known in the art can be used to map (de)activation information to each UE. This disclosure does not limit this.

[0086] Alternatively, when multiple UEs exist, BS 120 can be used to generate a corresponding LP-WUS 101 for each UE 110. In this case, BS 120 sends the corresponding LP-WUS to each UE separately. The LP-WUS 101 may include activation or deactivation information without any UE identifier.

[0087] Optionally, LP-WUS 101 may include resource indication information indicating one or more resource allocations to be activated or deactivated. For example, in the above example of activating a resource allocation for UE #1, LP-WUS 101 may also indicate which resource configuration to activate for UE #1 via the resource indication information. This is advantageous because there may be multiple predefined or pre-configured resource configurations between BS 120 and UE 110, and the size of the incoming service may require more than one resource allocation. Thus, UE 110 can explicitly know which resource configuration to activate, and signaling overhead can be reduced. Furthermore, service latency can be further reduced.

[0088] Optionally, before generating LP-WUS 101, BS 120 can send LP-WUS configuration information 102 to UE 110. LP-WUS configuration information 102 may include necessary information for UE 110 to monitor LP-WUS. In this disclosure, LP-WUS configuration information 102 may indicate one or more default resource allocations to be activated or deactivated. When LP-WUS 101 does not include resource indication information, one or more default resource allocations are to be activated or deactivated. When LP-WUS includes resource indication information, the resource indication information overrides one or more default resource allocations. It should be noted that the LP-WUS configuration information does not need to carry an indication to activate or deactivate one or more default resource allocations. Alternatively, one or more default resource allocations to be activated or deactivated may be pre-configured by BS 120 through other signaling (e.g., RRC signaling) or predefined as default UE behavior (e.g., in the technical specification).

[0089] Optionally, before generating LP-WUS 101, BS 120 can be used to send resource configuration to UE 110. This resource configuration indicates multiple pre-configured resource allocations. One or more resource allocations (to be activated or deactivated) belong to multiple pre-configured resource allocations. Optionally, the resource configuration is an SPS configuration, and the pre-configured resource allocation is an SPS timing (or allocation).

[0090] In other words, BS 120 can be used to send one or more SPS configurations to one or more UEs. Each SPS configuration indicates multiple resource allocations that are semi-statically assigned, which may also be referred to as multiple SPS timings (or allocations). In response to receiving LP-WUS 101, UE 110 can be used to activate or deactivate one or more SPS timings among the multiple SPS timings based on the activation or deactivation information included in LP-WUS 101.

[0091] Figure 2An example of a schematic structure of LP-WUS 101 according to this disclosure is shown. LP-WUS 101 includes a wake-up sequence 1011. The wake-up sequence 1011 may include a specific bit sequence detectable by LP-WUS 111. Therefore, the wake-up sequence 1011 is used to wake up UE 110 (or its main radio unit 112). LP-WUS 101 according to this disclosure may include activation information and / or deactivation information. The (de)activation information may include flag information 1016 indicating which UE is being activated or deactivated for one or more resource allocations. Optionally, LP-WUS 101 may include resource indication information 1017 indicating which resource allocation(s)(s) are being activated or deactivated. Flag information 1016 and resource indication information 1017 are optional, not required, because when LP-WUS is applied to a UE, flag information 1016 and resource indication information 1017 are not required.

[0092] Figure 3A An example of SPS and LP-WUS monitoring coexisting is illustrated. In this example, at time point t31, the BS can be used to send SPS configuration to the UE. The SPS configuration can indicate multiple SPS times, such as SPS 1, SPS 2, etc. In each SPS time, radio resources are pre-allocated or pre-configured by the network device, allowing the UE to directly use radio resources for communication (e.g., DL communication / UL communication / D2D communication). The SPS configuration can include (but is not limited to) one or more of the following parameters: SPS interval (or period), starting SFN, and starting subframe, which can be used to determine multiple SPS times. In this disclosure, the UE is configured with both SPS and LP-WUS monitoring.

[0093] Figure 3A An example is shown where, if no explicit activation information (via LP-WUS) is received, the default action is to skip the corresponding SPS timing. For example, at time 32, the UE receives an LP-WUS containing activation information. The activation information may indicate that an SPS timing has been activated (e.g., an SPS timing following the receipt of the LP-WUS). For this purpose, the activation information may include flag information. For example, the flag information may include a flag field (e.g., a bit value such as "1"). Therefore, during the time period t33 of SPS timing 1, the UE wakes up and begins communication according to SPS timing 1. At time t34, the UE may not have received any LP-WUS. Therefore, the UE will not wake up. That is, the UE remains in sleep mode and deactivates (skips) SPS timing 2 during the time period t35. At time t34, the UE may also receive an LP-WUS containing deactivation information. At this time, the UE will also deactivate SPS timing 2, but will not wake up.

[0094] Figure 3B This illustrates another example of SPS coexisting with LP-WUS monitoring. Figure 3B Corresponding to Figure 3A Another example is shown where, if no explicit deactivation information (via LP-WUS) is received, the default action is to activate the corresponding SPS timing. For example, at time 32, the UE receives an LP-WUS including deactivation information. The deactivation information can indicate that an SPS timing has been deactivated (e.g., an SPS timing after receiving the LP-WUS). For this purpose, the deactivation information can include flag information. For example, the flag information can include a flag field (e.g., having a bit value such as "0"). Therefore, during the time period t33 of SPS timing 1, the UE remains in sleep mode and deactivates SPS timing 1. That is, the UE remains in sleep mode at time t33 and does not wake up. At time t34, the UE may not receive any LP-WUS. Therefore, the UE wakes up and activates SPS timing 2 during the time period t35. Alternatively, at time t34, the UE may also receive an LP-WUS including activation information. In this case, the UE will also activate SPS timing 2 according to the activation information.

[0095] Optionally, LP-WUS can, for example, indicate one or more specific resource allocations to be activated or deactivated via resource indication information. For example, in Figure 3A and Figure 3B In this context, LP-WUS 101 may include resource indication information 1017, which indicates one or more specific SPS timings to be activated or deactivated. For example, at time point t32, LP-WUS may indicate that SPS timing 1 and SPS timing 2 are activated simultaneously. Figure 3A or Figure 3B (Not shown in the image). Therefore, the UE activates SPS timing 1 and SPS timing 2 ( Figure 3A or Figure 3B (Not shown in the image).

[0096] Figure 4A An example of SPS and LP-WUS monitoring coexisting is shown. In this example, at time point t31, the BS can be used to send signals to one or more UEs (e.g., Figure 4AIn the example of the three UEs, one or more SPS configurations are sent. Each SPS configuration can indicate multiple SPS times, such as SPS 1, SPS 2, SPS 3, etc. During each SPS time, radio resources are pre-allocated or pre-configured by the network equipment, allowing each UE to directly use the radio resources for communication (e.g., DL communication / UL communication / D2D communication). Each SPS configuration can include one or more of the following parameters: SPS interval (or period), starting SFN, and starting subframe, which can be used to determine multiple SPS times. In this example of the disclosure, each UE is configured with SPS and LP-WUS monitoring.

[0097] Figure 4A An example is shown where, if no explicit activation information (via LP-WUS) is received, the default action is to skip the corresponding SPS timing. At time 32, the BS generates and sends an LP-WUS including activation information. The activation information indicates that an SPS timing was activated only for the first UE (i.e., UE 1) (e.g., the SPS timing after receiving the LP-WUS). For this purpose, the activation information may include flag information. For example, the flag information may include a flag field mapped to UE 1 that indicates that an SPS timing was activated for UE 1. For example, the flag information could be "1, 0, 0". Alternatively, the activation information may include flag information only for UE #1. That is, there is no need to carry deactivation information for the second UE (i.e., UE #2) or the third UE (i.e., UE #3). Figure 4A The "(0, 0)" indicates that "0, 0" is optional. Therefore, during the time period t33 of SPS timing 1, only UE #1 wakes up and starts communication according to SPS timing 1. UE #2 and UE #3 remain in sleep mode and deactivate (or skip) SPS timing 1.

[0098] At time t34, none of the three UEs may receive any LP-WUS. Alternatively, an LP-WUS including the flag information "0, 0, 0" may be generated by the device and sent to the UE. In either case, none of the UEs will wake up. That is, the three UEs remain in sleep mode during time period t35 and deactivate (or skip) SPS timing 2.

[0099] At time t36, similar to time t32, the BS generates and transmits (another) LP-WUS including activation information. The activation information (e.g., “0, 0, 1”) indicates that the SPS timing was activated only for the third UE (e.g., the SPS timing after receiving the LP-WUS). There is no need to indicate “0, 0” to UE #1 and UE #2. Therefore, during the time period t37 of SPS timing 3, only UE #3 wakes up and activates SPS timing 3. UE #1 and UE #2 remain in sleep mode and deactivate SPS timing 3.

[0100] Figure 4B This illustrates another example of SPS coexisting with LP-WUS monitoring. Figure 4B Corresponding to Figure 4A Another example is shown where, if no explicit deactivation information is received (via LP-WUS), the default action is to activate the corresponding SPS timing. Figure 4A The difference is that, in Figure 4B In this case, activation information only needs to be explicitly indicated via LP-WUS. Activation information is optional. Other details are as follows: Figure 4A Similar to the case in China, I will not repeat it here.

[0101] exist Figure 3A , Figure 3B , Figure 4A and Figure 4B The bit values ​​“1” and “0” given are for illustrative purposes only. Other expressions are not excluded. Generally, a wake-up flag (e.g., included in LP-WUS) can be used to activate resource allocation; a skip (or continue sleeping) flag (e.g., included in LP-WUS) can be used to activate resource allocation.

[0102] Figure 3A , Figure 3B , Figure 4A and Figure 4B The SPS timing mentioned is for illustrative purposes only. It should be understood that... Figure 3A , Figure 3B , Figure 4A and Figure 4B The features disclosed in the document can be applied to any other type of resource allocation.

[0103] Figure 3A , Figure 3B , Figure 4A and Figure 4B The number of UEs listed is for illustrative purposes only. It should be understood that this disclosure can be applied to any number of UEs.

[0104] Figure 5 A schematic diagram of method 500 according to this disclosure is shown. Method 500 is performed by a network device for wireless communication.

[0105] Method 500 includes the following steps:

[0106] - Step 501: The network device generates a low-power wake-up signal (LP-WUS), wherein the LP-WUS includes activation information or deactivation information for activating or deactivating one or more resource allocations;

[0107] - Step 502: The network device sends LP-WUS to one or more user equipments.

[0108] From the above Figure 1 From the perspective of the network device shown in Figure 4, the steps of method 500 can share the same functionality and details. Therefore, the corresponding method implementation will not be described in detail here.

[0109] Figure 6 A schematic diagram of another method 600 according to this disclosure is shown. Method 600 is performed by a user equipment for wireless communication.

[0110] Method 600 includes the following steps:

[0111] - Step 601: The user equipment receives a low-power wake-up signal (LP-WUS) from the network device, where the LP-WUS includes activation information or deactivation information.

[0112] - Step 602: The user equipment activates or deactivates one or more resource allocations based on the activation information or deactivation information.

[0113] From the above Figure 1 From the perspective of the user device shown in Figure 4, the steps of method 600 can share the same functionality and details. Therefore, the corresponding method implementation will not be described in detail here.

[0114] Generally, this disclosure provides an LP-WUS including activation information (e.g., one or more wake-up flags) and / or deactivation information (e.g., one or more skip flags) for activating and / or deactivating (or skipping) one or more resource timings. Thus, the UE does not need to receive other scheduling information or perform PDCCH monitoring. Latency can be reduced. It can meet the needs of latency-sensitive services such as URLLC applications.

[0115] Optionally, the activation information can be scrambled with a UE identifier, enabling each UE to detect the corresponding activation information. Generally, activation information and UE information can be mapped using any suitable method, allowing each UE to detect the corresponding activation information in LP-WUS (e.g., by carrying it). This disclosure does not impose any limitations in this regard.

[0116] In the first default option, the UE can be used to skip one or more SPS allocations by default when LP-WUS monitoring is activated. This configuration can be provided via an RRC configuration message. With L1 activation, the same active BWP and the same resource allocation (e.g., SPS allocation) can be assigned to one or more UEs. Optionally, the same LP-WUS monitoring mode can be assigned to one or more UEs.

[0117] When one or more UEs begin LP-WUS monitoring, resource allocations (e.g., SPS allocations) are deactivated (or skipped) unless the LP-WUS includes activation information. Optionally, the mapping between LP-WUS monitoring modes and SPS timings can be preconfigured (e.g., via a BS) or defined as default behavior (e.g., via a specification). For example, a UE can be preconfigured or defined to activate the first SPS timing upon receiving an LP-WUS that includes activation information. In other words, the first SPS timing upon receiving an LP-WUS is the next SPS timing after the received LP-WUS. Alternatively, other options are possible and are not excluded in this disclosure. For example, a UE can be preconfigured to activate the first two SPS timings upon receiving an LP-WUS. LP-WUS 101 may also carry explicit resource indication information 1017 indicating which resource allocations (e.g., SPS timings) should be activated. This disclosure does not limit this.

[0118] Alternatively, to deactivate LP-WUS monitoring, RRC signaling or L1 / L2 signaling can be used. Alternatively, LP-WUS monitoring can be deactivated based on one or more timers or common procedures such as BWP switching or SSSG switching.

[0119] Optionally, the LP-WUS including activation and / or deactivation information can be combined with or separated from the LP-WUS including scheduling information (e.g., PDCCH scheduling information). For example, a single LP-WUS may include activation information (and / or deactivation information) and PDCCH scheduling information. Alternatively, the BS may send a first type of LP-WUS including activation information (or deactivation information) to a first UE and a second type of LP-WUS including PDCCH scheduling information to a second UE. This disclosure does not limit this.

[0120] In the second default option (as an alternative to the first default option), the UE can choose not to skip one or more SPS allocations by default unless deactivation information (e.g., a skip flag or a sleep flag) is received via LP-WUS. In the second default option, LP-WUS can be used to explicitly instruct the UE to continue sleeping. This is advantageous because the UE can continue sleeping (e.g., when no actual data transmission is needed) even when it has pre-configured resource allocations (e.g., one or more SPS assignments). This can reduce power consumption. The second default option can share similar option features with the first default option, which will not be elaborated further here.

[0121] The network can be configured to follow either a first default option or a second default option. For example, the network device of this disclosure can send default behavior information to each UE. The default behavior information indicates either the first default option or the second default option. The first and second default options can be indexed by flags or one or more bits, the meaning of which can be predefined, for example, in the technical specification. The default behavior information can be indicated by any suitable signaling, such as, but not limited to, RRC signaling, SPS configuration, or LP-WUS configuration information, etc.

[0122] In summary, this disclosure provides improved LP-WUS signaling. LP-WUS includes activation and / or deactivation information for activating and / or deactivating one or more resource allocations. This reduces latency and UE power consumption, and also reduces signaling overhead.

[0123] This disclosure can be applied to any telecommunications network / system, such as, but not limited to, 5G (or NR) mobile networks, 6G mobile networks, etc. Both network device 120 and user equipment 110 in this disclosure may include processing circuitry or chipsets (not shown) for performing, implementing, or initiating the various operations described herein. The processing circuitry may include hardware and software. The hardware may include analog or digital circuitry, or both. The digital circuitry may include components such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), or multi-purpose processors. Optionally, the processing circuitry (or chipset) includes one or more processors and non-transitory memory connected to one or more processors. The non-transitory memory may carry executable program code, which, when executed by one or more processors, causes the device to perform, implement, or initiate the operations or methods described herein.

[0124] This disclosure has been described in conjunction with various embodiments and implementations as examples. However, based on a study of the drawings, this disclosure, and the independent claims, those skilled in the art will be able to understand and implement other variations when carrying out the claimed invention. In the claims and the description, the word "comprising" does not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude multiple. A single element or other unit may fulfill the function of several entities or items set forth in the claims. The enumeration of certain measures in dissimilar dependent claims does not imply that combinations of these measures cannot be used in advantageous implementations.

Claims

1. A network device (120) for wireless communication, characterized in that, The network device (120) is configured as follows: Generate a low-power wake-up signal LP-WUS (101), wherein the LP-WUS (101) includes activation information or deactivation information for activating or deactivating one or more resource allocations; Send the LP-WUS (101) to one or more user equipment (110).

2. The network device (120) according to claim 1, characterized in that, The network device (120) is also configured to activate or deactivate the one or more resource allocations based on the activation information or deactivation information.

3. The network device (120) according to claim 1 or 2, characterized in that, The activation or deactivation information includes flag information (1016), which indicates whether the resource allocation is activated or deactivated for each user device (110).

4. The network device (120) according to any one of claims 1 to 3, characterized in that, The activation or deactivation information includes resource indication information (1017), which indicates the one or more resource allocations to be activated or deactivated.

5. The network device (120) according to any one of claims 1 to 4, characterized in that, Before generating the LP-WUS (101), the network device (120) is configured as follows: Send LP-WUS configuration information (102) to the one or more user equipments (110), wherein the LP-WUS configuration information (102) indicates one or more default resource allocations as to be activated or deactivated for the one or more resource allocations.

6. The network device (120) according to any one of claims 1 to 5, characterized in that, Before generating the LP-WUS (101), the network device (120) is configured to send one or more resource configurations to the one or more user equipments (110), wherein each resource configuration indicates a plurality of pre-configured resource allocations, the one or more resource allocations belonging to the plurality of pre-configured resource allocations.

7. The network device (120) according to claim 6, characterized in that, The one or more resource configurations include one or more semi-static scheduling (SPS) configurations, wherein each SPS configuration indicates a plurality of semi-static resource allocations as the plurality of pre-configured resource allocations.

8. A user equipment (110) for wireless communication, characterized in that, The user equipment (110) is configured to: Receive a low-power wake-up signal LP-WUS (101) from the network device (120), wherein the LP-WUS (101) includes activation information or deactivation information; Based on the activation or deactivation information, activate or deactivate one or more resource allocations.

9. The user equipment (110) according to claim 8, characterized in that, The activation or deactivation information includes flag information (1016), which indicates whether the user equipment (110) is activated or deactivated and the corresponding resource allocation is applied.

10. The user equipment (110) according to claim 8 or 9, characterized in that, The activation or deactivation information includes resource indication information (1017), which indicates the one or more resource allocations to be activated or deactivated.

11. The user equipment (110) according to any one of claims 8 to 10, characterized in that, Before receiving the LP-WUS (101), the user equipment (110) is configured to: Receive LP-WUS configuration information (102) from the network device (120), wherein the LP-WUS configuration information (102) indicates one or more default resource allocations as to be activated or deactivated for the one or more resource allocations.

12. The user equipment (110) according to any one of claims 8 to 11, characterized in that, Before receiving the LP-WUS (101), the user equipment (110) is configured to receive a resource configuration from the network device (120), wherein the resource configuration indicates a plurality of pre-configured resource allocations, the one or more of which belong to the plurality of pre-configured resource allocations.

13. The user equipment (110) according to claim 12, characterized in that, The one or more resource configurations include one or more semi-static scheduling (SPS) configurations, wherein each SPS configuration indicates a plurality of semi-static resource allocations as the plurality of pre-configured resource allocations.

14. A system (100), characterized in that, It includes one or more network devices (120) according to any one of claims 1 to 7 and one or more user devices (110) according to any one of claims 8 to 13.

15. A method (500) for wireless communication, characterized in that, The method includes: The network device (120) generates (501) a low-power wake-up signal LP-WUS (101), wherein the LP-WUS (101) includes activation information or deactivation information for activating or deactivating one or more resource allocations; The network device (120) sends (502) the LP-WUS (101) to one or more user devices (110).

16. A method (600) for wireless communication, characterized in that, The method includes: The user equipment (110) receives (601) a low-power wake-up signal LP-WUS (101) from the network device (120), wherein the LP-WUS (101) includes activation information or deactivation information; The user equipment (110) activates or deactivates (602) one or more resource allocations based on the activation information or deactivation information.

17. A computer program comprising instructions, characterized in that, When executed by a computer, the program causes the computer to perform the method according to claim 15 or 16.

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