WO2025045839A1

WO2025045839A1 - A method for enabling transmission of data from a low power device, related wireless node, and related low power device

Info

Publication number: WO2025045839A1
Application number: PCT/EP2024/073850
Authority: WO
Inventors: Nafiseh Seyed MAZLOUM; Basuki PRIYANTO; Anders Berggren; Torgny Palenius
Original assignee: Sony Europe Bv; Sony Group Corp
Current assignee: Sony Europe Bv; Sony Group Corp
Priority date: 2023-08-31
Filing date: 2024-08-26
Publication date: 2025-03-06
Anticipated expiration: 2026-02-28

Abstract

Disclosed is a method, performed by a wireless node, for enabling transmission of data from a low power device, LPD. The method comprises receiving, from the LPD, information indicative of one or more resource configurations for UL transmission required by the LPD. The one or more resource configurations is a subset of predetermined resource configurations for uplink transmission by LPDs. The method comprises transmitting, to the LPD, a grant to use one particular resource configuration out of the one or more required resource configurations for transmission of data. The method comprises receiving the data from the LPD based on the granted resource configuration.

Description

A METHOD FOR ENABLING TRANSMISSION OF DATA FROM A LOW POWER DEVICE, RELATED WIRELESS NODE, AND RELATED LOW POWER DEVICE

The present disclosure pertains to the field of wireless communications. The present disclosure relates to a method for enabling transmission of data from a low power device, a related wireless node, and a related low power device.

BACKGROUND

Complex and dynamic signalling for scheduling resource allocation for a wireless device can be power consuming and demanding, especially for Internet of Things (loT) devices with limited energy resources. For such resource allocation, a wireless device also needs to be fully synchronized to be able to receive configuration information for its uplink or downlink resource allocation. This makes a reception of resource allocation configuration information demanding in terms of power consumption for devices with limited energy resources.

Existing protocol and signalling may not fully support connectivity for loT devices that are operating having access to limited energy resources, such as low power devices. When it comes to resource allocation and resource management, traditional cellular wireless communication systems support flexible time and frequency resource allocation so that the system can flexibly schedule the data transmission of a wireless device according to the system load, the number of wireless devices, the wireless device type, and the priority of services. Additionally, the wireless device typically needs to switch between an idle or inactive mode and a connected mode to be able to access the channel and perform uplink transmission.

Furthermore, the wireless device must be in connected mode to receive the resource allocation configuration. The signalling to support such dynamic scheduling and resource allocation are, however, complex and power consuming for devices with limited energy resources.

SUMMARY

Accordingly, there is a need for devices and methods for enabling transmission of data from a device with limited energy resources, which may mitigate, alleviate, or address the shortcomings existing and may provide for a reduction in signalling overhead.

Disclosed is a method, performed by a wireless node, for enabling transmission of data from a low power device (LPD). The method comprises receiving, from the LPD, information indicative of one or more resource configurations for UL transmission required by the LPD. The one or more resource configurations is a subset of predetermined resource configurations for uplink transmission by LPDs. The method comprises transmitting, to the LPD, a grant to use one particular resource configuration out of the one or more required resource configurations for transmission of data. The method comprises receiving the data from the LPD based on the granted resource configuration.

Further, a wireless node comprising memory circuitry, processor circuitry, and a wireless interface is provided. The wireless node is configured to perform any of the methods disclosed herein relating to the wireless node.

It is an advantage of the present disclosure that a low-power, low overhead channel access scheme and resource allocation mechanism can be provided. Based on the indication of one or more resource configuration out of a plurality of predetermined resource configurations required by the LPD for transmission of data the wireless node can provide a resource configuration adapted to the LPD characteristics. By receiving an indication of one or more resource configuration out of a plurality of predetermined resource configurations required by the LPD for transmission of data rather than having to transmit an entire resource configuration for each data transmission from the LPD, the wireless node can grant resources to the LPD using limited signalling. This reduces the signalling overhead during the channel access procedure, which allows the LPD to perform the resource allocation mechanism without using radio resource control (RRC) signalling in connected mode to set up the connection. The wireless node thus enables the LPD to access the channel and perform the transmission of data without having to move to an RRC_CONNECTED state. The LPD can thus remain in a low energy state during the channel access procedure which can reduce the energy consumption of the LPD.

Disclosed is a method, performed by a low power device, for enabling transmission of data from the LPD. The method comprises transmitting, to a wireless node, information indicative of one or more resource configurations for UL transmission required by the LPD. The one or more resource configurations is a subset of predetermined resource configurations for uplink transmission by LPD. The method comprises receiving, from the wireless node, a grant to use one particular resource configuration out of the one or more required resource configurations for transmission of data. The method comprises transmitting the data based on the granted resource configuration.

Further, a low power device comprising memory circuitry, processor circuitry, and a wireless interface is provided. The low power device is configured to perform any of the methods disclosed herein relating to the LPD.

It is an advantage of the present disclosure that a low-power, low overhead channel access scheme and resource allocation mechanism can be provided. Based on the indication of one or more resource configuration out of a plurality of predetermined resource configurations required by the LPD for transmission of data the wireless node can provide the LPD with a resource configuration adapted to the LPD characteristics. By transmitting an indication of one or more resource configuration out of a plurality of predetermined resource configurations required by the LPD for transmission of data, the LPD enables the wireless node to grant resources for transmission of data to the LPD using limited signalling. This reduces the signalling overhead, which allows the LPD to perform the resource allocation mechanism without using radio resource control (RRC) signalling in connected mode to set up the connection. The LPD can thus access the channel and perform the transmission of data without having to move to an RRC_CONNECTED state. Thereby, the LPD can remain in a low energy state during the channel access procedure which can reduce the energy consumption of the LPD.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present disclosure will become readily apparent to those skilled in the art by the following detailed description of examples thereof with reference to the attached drawings, in which:

Fig. 1 is a diagram illustrating an example wireless communication system comprising an example radio network node and example wireless devices according to this disclosure,

Fig. 2 illustrates an example resource configuration to be used for transmission of data according to this disclosure,

Fig. 3 is a flow-chart illustrating an example method, performed in a wireless node, for enabling transmission of data from a low power device according to this disclosure,

Fig. 4 is a flow-chart illustrating an example method, performed in a low power device, for enabling transmission of data from the low power device according to this disclosure,

Fig. 5 is a block diagram illustrating an example wireless node according to this disclosure,

Fig. 6 is a block diagram illustrating an example low power device according to this disclosure, and

Fig. 7 is a signalling diagram illustrating an example communication between a low power device and a wireless node according to this disclosure. DETAILED DESCRIPTION

Various examples and details are described hereinafter, with reference to the figures when relevant. It should be noted that the figures may or may not be drawn to scale and that elements of similar structures or functions are represented by like reference numerals throughout the figures. It should also be noted that the figures are only intended to facilitate the description of the examples. They are not intended as an exhaustive description of the disclosure or as a limitation on the scope of the disclosure. In addition, an illustrated example needs not have all the aspects or advantages shown. An aspect or an advantage described in conjunction with a particular example is not necessarily limited to that example and can be practiced in any other examples even if not so illustrated, or if not so explicitly described.

The figures are schematic and simplified for clarity, and they merely show details which aid understanding the disclosure, while other details have been left out. Throughout, the same reference numerals are used for identical or corresponding parts.

A connected mode may be referred to an operation mode wherein a data transmission can be communicated e.g., between a wireless device and a network node or between a wireless device and another wireless device. A connected mode may be referred to an operation state wherein a radio transmitter and/or a radio receiver is activated for such communication. A connected mode may be referred to an operation state wherein a wireless device is synchronized time-wise and/or frequency-wise e.g., by a determined timing advance parameter for the communication. In certain communication systems, a connected mode may be referred to a radio resource control (RRC) state. In various examples, an active state may be a RRC connected state and/or an RRC active state. For example, an active state may be referred to as an RRC_CONNECTED mode.

A dormant mode is a mode where a wireless device has no active connection with a network node. A dormant mode may be seen as an inactive mode of the wireless device. A dormant mode may be seen as a mode where the wireless device is unsynchronized with a timing of a network. In one or many examples, the wireless device may in a dormant mode not have a valid timing advance information with respect to the network. A dormant mode may be seen as a mode where the wireless device is unable to receive dedicated signalling. A dormant mode may be seen as a mode where closed loop power control is inactivated or suspended. Dormant mode may comprise RRC idle mode, RRC suspend and/or RRC inactive mode. For example, an active state may be referred to as an RRC_IDLE/INACTIVE mode. For example, the wireless device may be in dormant mode when the connection with the network node has been released and/or suspended. Fig. 1 is a diagram illustrating an example wireless communication system 1 comprising an example radio network node 400 and example wireless devices 300, 300A according to this disclosure.

As discussed in detail herein, the present disclosure relates to a wireless communication system 1 comprising a cellular system, for example, a 3GPP wireless communication system. The wireless communication system 1 comprises a radio network node 400, and wireless devices 300, 300A.

A radio network node disclosed herein refers to a radio access network (RAN) node operating in the radio access network, such as one or more of: a base station, BS, an evolved Node B (eNB), a gNB in new radio (NR), an access point (AP), and a small cell (SC). In one or more examples, the RAN node is a functional unit which may be distributed in several physical units.

A core network (CN), node disclosed herein refers to a network node operating in the core network, such as in the Evolved Packet Core Network (EPC), and/or a 5G Core Network (5GC). Examples of CN nodes in EPC include a Mobility Management Entity (MME), and in 5GC an Access & Mobility Management Function (AMF).

The wireless device 300, 300A may be configured to communicate with the radio network node 400 via a wireless link (or radio access link) 10. The radio network node 400 may be configured to communicate with the CN node 600 via a wired or wireless link 12. A first wireless device, such as the wireless device 300, may be configured to communicate with a second wireless device, such as the wireless device 300A, via a wireless link (or radio access link) 14. The wireless link 14 may herein also be referred to as a sidelink and may operate via a PC5 interface. During sidelink communication between the first WD 300 and the second WD 300A one of the wireless devices 300, 300A may act as a master wireless device for setting up the sidelink. The master wireless device may for example transmit Sidelink Primary Synchronization Signals (SPSS), Sidelink Secondary Synchronization Signals (SSSS), and/or Physical Sidelink Broadcast Channel (PSBCH) to the other wireless device in the sidelink.

In one or more examples of the current disclosure, the radio network node 400 and/or the wireless device 300A may act as a wireless node according to the disclosure. In some examples, the wireless node disclosed herein is a radio network node and/or the wireless device (such as a UE).

In one or more examples, the wireless device 300 may be a low power device (LPD). An LPD may herein refer to one or more of: a mobile device, a user equipment (UE), an energy harvesting device, and an ambient loT device. In other words, a low power device (LPD) may be seen as one or more of: a power constrained loT device, an loT device, such as an ambient loT device, and a low power device with small batteries, such as a zero-power and/or a zeroenergy device.

In one or more examples, an LPD comprises one or more of: a passive circuitry as its transmitter, where backscattering is used for its data transmission, an ultra-low power receiver, a re-chargeable energy resource device, a memory, and a small processing unit.

In one or more examples, an LPD is associated with a device type. In one or more examples, the device types may be categorized based on their synchronization capability, such as whether the circuitry of the LPD is active, semi-active or passive. For example, an LPD can have different synchronisation capability, such as clock (CLK) accuracy, based on whether its circuitry is fully passive, semi-active, or fully active. The CLK accuracy may influence timing granularity and thereby the LPDs Discontinuous Transmission (DTX) operation. An LPD may belong to a given category based on the CLK accuracy. For example, an LPD A can be fully passive with poor CLK accuracy. For example, an LPD B can be semi-active with a better CLK accuracy than LPD A. For example, an LPD C can be fully active with CLK accuracy better than LPD B.

In one or more examples, an LPD can be periodically transmitting data, such as positioning data and/or sensory data, to a wireless node. In one or more examples, such a data transmission can be LPD originated. The LPD originated data transmission may comprise data originating from a sensor, such as a sensor reporting data via the LPD or a sensor comprised in the LPD. In one or more examples, such data can be wireless node triggered, periodical reporting by the LPD within a certain time period, for instance via sending a wake-up signal so that the wake-up receiver wakes up the transmitter of the LPD (e.g., a receiver initiated transmission). In one or more examples, the LPD can perform non-periodic trigger-based transmission to transmit data, such as a positioning report, a measurement report, and/or a status report. The LPD can for example be triggered to perform transmission of data by the wireless node. In one or more examples, the LPD can be triggered to perform transmission of data based on a specific event. In other words, transmission of data may be event based triggered and/or wireless node based triggered. Such periodic and non-periodic transmissions of data performed by the LPD may be referred to as traffic characteristics. For example, a traffic characteristic may refer to a time periodicity during which the LPD intends to perform an Uplink (UL) transmission. A traffic characteristic may indicate one or more of: device originated periodic UL reporting traffic and trigger based traffic with a certain delay allowance on UL transmission. Such transmissions between the LPD and the wireless node may be performed directly or via an assistant device, such as via a sidelink WD, relay WD, or a coverage enhancing device (CED). The present disclosure provides a scheduling and resource allocation mechanism to support LPDs, such as low-power ambient loT devices, designed based on these traffic characteristics and/or the device type, thereby allowing low power and low overhead channel access.

When it comes to resource allocation and resource management, traditional cellular wireless communication systems support flexible time and frequency resource allocation so that the system can flexibly schedule data transmission of the WD according to the system load, the number of WDs, the WD type and a priority of services. Additionally, the WD typically needs to move between RRC_IDLE/INACTIVE mode and RRC_CONNECTED mode, to be able to access the channel and perform uplink transmission. The signalling to support such dynamic scheduling and resource allocation is, however, complex and power consuming for low-energy and/or zero-energy loT type devices.

The present disclosure provides a solution for resource allocation and channel access suitable for LPDs, without requiring the LPD to move from RRC_IDLE/INACTIVE to RRC_CONNECTED state using random access signalling or using a flexible scheduling based on Physical Downlink Control Channel (PDCCH) signalling. An LPD may thus be seen as a device being state-less or a device that is always operating in the less power consuming RRC_IDLE state.

The present disclosure provides a method for enabling uplink transmissions for LPDs, such as ultra-low power loT devices, by providing a resource configuration to be used on such uplink transmissions. The present disclosure provides a method for reducing signalling overhead, including the number of transactions and/or the size in each transaction.

Fig. 2 illustrates an example resource allocation 26, such as a resource pattern, available to be used for UL transmission of data from LPDs according to this disclosure. The example resource allocation may be a predetermined resource allocation, such as a generic resource allocation, available to be used for UL transmission of data from the LPDs. The generic resource allocation may comprise a plurality of time windows 22, such as Uplink T ransmission Windows (UTWs), in which an uplink transmission from the LPD can be performed. In the example resource allocation of Fig. 2, a first time window 22A, a second time window 22B, and a third time window 22C is shown. The time windows 22, 22A, 22B, 22C, may be separated by a DTX period 24. In one or more examples, DTX cycles can be defined based on an expected periodicity of an UL transmission, such as based on a DTX period 24, and/or a latency requirement of the LPD. In other words, a plurality of LPDs may be scheduled in the same time window. Furthermore, a plurality of LPDs may also be scheduled with different DTX periodicity. Each time window 22 may comprise a plurality of transmission opportunities (TOs) 26. Each TO may comprise one or more time and/or frequency resources. A TO can herein be seen as a subset of the resources, such as time and frequency resources, comprised within the time window. Each TO may be associated with one or more LPD, such as a group of LPDs. In other words, different LPDs or groups of LPDs can be allocated in different TOs, such as in different time and/or frequency resources within a time window. The time windows 22 may be associated with a discontinuous transmission (DTX) pattern and a resource size, with the DTX pattern being associated with a DTX period 24. Each transmission cycle of the LPD may be a time window for uplink transmission, such as an uplink transmission window (UTW) comprising one or more transmission opportunities (TOs), with certain time and frequency distance between two consecutive transmission opportunities in one time window. In one or more examples, the UTW may be a resource allocation available to multiple LPDs and/or a group of LPDs. In one or more examples, the time windows, such as the UTWs, may be seen as a configuration that is applicable to multiple LPDs and/or to a group of LPDs. In one or more examples, resource configuration can be indicative of one or more TOs 26, such as resources associated with a time opportunity. The allocation of transmission opportunities within each time window for each LPD, may be dependent on a capability, such as a synchronization capability, of the LPD. In one or more examples, an LPD having coarse -synchronization capability may not be scheduled in the first few TOs in each time window, while an LPD having high-synchronization capability, such as a fine synchronization capability, may be scheduled in the first few TOs in each time window.

The wireless node may broadcast information indicative of one or more predetermined resource configurations for uplink transmission by LPDs, such as a generic resource configuration for uplink transmission by the LPDs. The one or more predetermined resource configurations may be indicative of the resource allocation available to be used for UL transmissions of data from LPDs, such as the example resource allocation shown in Fig. 2. The resource allocation available to be used for UL transmissions of data from LPDs can be seen as an entirety of the resources that are available for data transmission from any LPD. In one or more example methods, the one or more predetermined resource configurations may be indicative of a plurality of different resource subsets within the resource allocation of the predetermined resource configurations, such as of the entirety of the resource allocation. The plurality of different resource subsets may thus be parts of the entirety of the resources that are available for LPDs for UL transmission. The plurality of different resource subsets may for example be dedicated to different types of LPDs, or different groups of LPDs, and/or may be dedicated to different types of transmissions, such as for registration transmissions allowing the LPD to register to the wireless node and/or data transmissions. In other words, the wireless node may broadcast the one or more predetermined resource configurations, such as the generic resource configuration, to one or more LPDs, such as multiple LPDs and/or a group of LPDs. The predetermined resource configuration may be indicative of a time window for transmission of data from LPDs, such as one or more of the UTWs shown in Fig. 2. A time window may comprise one or more transmission opportunities for transmission of data. For example, the information indicative of predetermined resource configurations for uplink transmission by LPDs may be indicative of a window size and/or an offset identifying the location of each transmission opportunity 26 and/or an index identifying the location of each transmission opportunity 26.

The LPD may select one or more resources from the available resources for uplink transmission from the LPD, such as from the generic resource allocation, either randomly or in a certain order. The LPD may then transmit, to the wireless node, information indicative of the one or more selected resource configurations for UL transmission, such as a resource configuration required, desired, and/or indicated by the LPD. An access to the channel may be obtained by performing a channel access procedure, such as one or more of: a listen-before-talk (LBT) procedure, an ALOHA protocol, and a carrier sense multiple access/collision avoidance (CSMA- CA) protocol. In other words, the LPD may transmit, to the wireless node, information indicative of one or more resource configurations for UL transmission required by the LPD. In one or more examples, the one or more resource configurations required by the LPD is a subset of predetermined resource configurations for uplink transmission by LPDs. In one or more examples, the information indicative of one or more resource configurations for UL transmission required by the LPD comprises one or more of: a device type of the LPD, an identifier identifying the LPD, and a transmission pattern of the LPD.

The wireless node may transmit, to the LPD, a grant to use one particular resource configuration out of the one or more required resource configurations for transmission of data, in other words, the wireless node may determine the one particular resource configuration based on one or more of: the device type of the LPD, the identifier identifying the LPD, the transmission pattern and/or characteristic of the LPD, and a synchronization capability. The wireless node may inform the LPD on the particular resource configuration for UL transmission thereby allowing transmission of data with certain delay allowance on UL. For example, an LPD with a low synchronization capability have a longer delay allowance on UL transmission. The present disclosure may allow an LPD to synchronize periodic UL reporting according to the one particular resource configuration comprised in the grant. The present disclosure may allow an LPD to operate based on a preconfigured DTX pattern and/or operation.

In other words, the LPD may obtain the particular resources for UL transmission in two ways, either by selecting the resources itself and notifying the wireless node or by receiving a grant from the wireless node. The grant and the notification of resources may be scheduled in separate resources, such as in different time windows or in different resource subsets within a time window.

In one or more examples, the one or more transmission opportunities and an on-duration of the particular resource configuration comprised in the grant are based on the synchronization capability and characteristics of the LPD. For example, LPDs belonging to a same device category and/or time may be grouped to follow the same DTX pattern. For example, the DTX pattern may have a longer on-duration for LPDs having a relaxed CLK accuracy capability, such as coarse synchronization capability, and have a shorter on-duration for LPDs having a fine synchronization capability, such as having a synchronised state with a small granularity of synchronisation error. The on-duration of the DTX pattern may correspond to the period of the time-window, such as to the period of the UTW. An LPD having a fine synchronization capability herein means that the LPD has a better accuracy of the timing and clock frequency, and thus a better accuracy and performance of the synchronization algorithm than an LPD having a coarse synchronization capability. In one or more example methods, LPDs from the same type and/or category can follow different transmission opportunities when the transmission of data from such LPDs in the same device type and/or category have different time periodicity.

In one or more examples, the wireless node, such as a radio network node, can configure the DTX pattern, such as a DTX pattern for multi purposes or various DTX patterns for different functions. For example, the wireless node can configure a DTX pattern for registration of an LPD, such as for transmission of the information indicative of one or more resource configurations for UL transmission required by the LPD, and another DTX pattern for any subsequent transmission, such as for transmission of the data, either periodic and/or triggered data.

Fig. 3 is a flow-chart illustrating an example method 100, performed in a wireless node 700 according to this disclosure, for enabling transmission of data from a low power device, LPD. The wireless node 700 may be the wireless node 700 of Fig. 5 and Fig. 7. In one or more example methods, the wireless node 700 can be one or more of: a radio network node, such as radio network node 400 of Fig. 1 , and a master wireless device, such as wireless device 300A of Fig. 1.

In one or more example methods, the method comprises broadcasting S102 information indicative of one or more predetermined resource configurations, such as generic resource configurations, for uplink transmission by LPDs. The information may be broadcasted to a plurality of LPDs, such as a group of LPDs or all LPDs within a cell. The predetermined resource configurations may be indicative of a resource allocation, such as a resource pattern, such as a time window, such as a frequency bandwidth, available to be used for UL transmission of data from any LPD. The particular resource configuration out of the predetermined resource configurations to be used by the LPD may be dependent on the LPDs capability and/or traffic pattern. The predetermined resource configuration may comprise parameters of the resource allocation which may be applicable to all LPDs depending on their configuration. The predetermined resource configurations may be generic resource configurations, such as a one or more resource configurations, indicative of one or more resource allocations, that may be used by any LPD for UL transmission. Each LPD may use, such as may be configured with, a subset of the predetermined resource configurations, such as a specific resource configuration out of the predetermined resource configurations, for its UL transmissions. In one or more example methods, the information indicative of predetermined resource configurations for uplink transmission by LPDs comprise one or more resource configurations for the LPD, that can access the resources of the wireless node.

In one or more example methods, the information indicative of the predetermined resource configurations for uplink transmission by LPDs, such as the generic resource configuration, comprises one or more transmission pattern(s). The one or more transmission pattern is to be used for one or more of data transmission and transmission of the information indicative of one or more resource configurations for UL transmission required by the LPD. In one or more example methods, the predetermined resource configuration is indicative of an uplink transmission window, comprise time window and/or the frequency bandwidth for transmission of data from LPDs. The time window may comprise one or more transmission opportunities for transmission of data. In one or more example methods, the one or more predetermined resource configurations comprise resources for uplink and/or sidelink transmission.

In one or more example methods, the predetermined resource configurations for uplink transmission by LPDs are preconfigured in the LPD and/or the wireless node. In one or more example methods, the wireless node and/or the LPD may have stored in a memory the predetermined resource configurations in a memory, such as a memory circuitry. In one or more example methods, the one or more resource configurations may be preconfigured in the one or more LPDs at fabrication and/or by hardware design.

In one or more example methods, the information indicative of predetermined resource configurations for UL transmission comprises information indicative of a time window for transmission, such as a time window for uplink transmission (UTW). The time window may be comprised in a transmission cycle associated with the LPD. In one or more example methods, the information indicative of predetermined resource configurations for uplink transmission comprises one or more time windows for a periodic data transmission and/or a triggered based data transmission. Put differently, each transmission cycle of the LPD may be a time window, such as a time window for uplink transmission (UTW), comprising one or more transmission opportunities in one UTW with certain time and frequency distance between two consecutive time windows and/or transmission opportunities. In one or more example methods, subsets of the transmission opportunities comprised in the time windows may be associated with one or more LPDs, such as to a group of LPDs or a plurality of LPDs. In one or more examples, the predetermined resource configurations may be indicative of one or more of: a time window size, and/or an offset of the time windows and/or transmission opportunities, and/or an index identifying the location of each time window and/or transmission opportunity within the time window. This step S102 corresponds to step S202 of Fig. 4 and the signalling 506 of Fig. 7.

The method 100 comprises receiving S104, from the LPD, information indicative of one or more resource configurations for UL transmission required by the LPD. In one or more example methods, the one or more resource configurations for UL transmission required by the LPD can herein be seen as one or more selected and/or requested resource configurations, such as one or more resource configurations selected and/or requested by the LPD out of the one or more predetermined resource allocations. The LPD may determine one or more resource configurations out of the predetermined resource configurations that it would like to use for UL transmission based on its capability and/or radio channel conditions. In one or more example methods, the LPD may select the determined resource configuration and may notify the wireless node about the selected resource configuration. In one or more example methods, the LPD may send a request, to the wireless node, to use the determined resource configuration and may await a grant for the requested resource configuration from the wireless node before applying the requested resource configuration. Since the capability of the LPD may influence the required resource configuration, the required resource configuration may in one or more examples herein be referred to as a supported and/or implemented resource configuration, such as a resource configuration supported by the LPD and/pr implemented in the LPD. The one or more resource configurations required by the LPD may be a subset of the predetermined resource configurations, such as the generic resource configurations, for uplink transmission by LPDs. The information indicative of the one or more resource configurations required by the LPD for UL transmission may comprise a transmission parameter of the LPD. The transmission parameter may be indicative of one or more of: a device type of the LPD, a traffic type of the LPD, an identifier identifying the LPD, a transmission pattern of the LPD, and a resource configuration identifier identifying a resource configuration to be used by the LPD for transmission of data. The traffic type of the LPD may be indicated with a traffic type parameter. The traffic type may be indicative of a quality and/or importance of the data to be transmitted. Further example, the traffic type parameter may indicate the payload size. In one or more example methods, the identifier identifying the LPD can be either a temporary identifier or a permanent identifier. In one or more example methods, the device type of the LPD can be indicative of certain characteristics of the LPD. For example, the device type of the LPD can indicate synchronization capabilities of the LPD. In other words, the device type of the LPD can indicate whether the circuitry of the LPD is fully passive, semi-active, or fully active, which may influence its synchronization capability. In one or more example methods, the transmission pattern, such as a part of the traffic pattern, can be indicative of a periodicity associated with UL transmissions performed by the LPD. For example, the transmission pattern can indicate that the LPD requires resources to be used for UL transmission at certain times and/or time periods. For example, the transmission pattern can be seen as a transmission pattern preferred, supported, required, implemented, and/or desired by the LPD. In one or more examples, the information indicative of one or more resource configurations for UL transmission required by the LPD can comprise an identifier identifying a preconfigured resource that the LPD intends to use for transmission of data, such as a resource configuration identifier. In one or more example methods, the information indicative of one or more resource configurations for UL transmission required by the LPD may be received from the LPD in a capability message. Such capability message may implicitly indicate resource configurations preconfigured in the LPD.

In one or more example methods, the wireless node receives the information of the one or more resource configurations for UL transmission required by the LPD as a request from the LPD for using one of the one or more predetermined resource configurations for a data transmission. In one or more example methods, the wireless node receives the information of the one or more resource configurations for UL transmission required by the LPD as a first message during an initial attach procedure, such as a Random Access Channel (RACH) procedure. In other words, the wireless node may receive the information indicative of the one or more resource configurations for UL transmission required by the LPD without the LPD entering into RRC connected mode, thereby reducing signalling overhead and energy consumption of the LPD. This step S104 corresponds to step S204 of Fig. 4 and the signalling 508 of Fig. 7.

In one or more example methods, the method comprises determining S105, based on the information received from the LPD a, such as one, resource configuration indicative of, such as associated with, a resource to be used by the LPD for transmission of data. In one or more examples, determining the resource configuration to be used by the LPD comprises determining a particular resource configuration out of the one or more predetermined resource configurations to be used by the LPD for transmission of data. The resource to be used may be a subset of the resources allocated for transmission of data by LPDs indicated in the predetermined resource configuration. The determining of the resource to be used by the LPD for transmission of data may be based on the transmission parameter of the LPD, such as one or more of: the device type of the LPD, the identifier identifying the LPD, the transmission pattern of the LPD, the traffic type, and the identifier identifying the preconfigured and/or predetermined resource that the LPD intends to use for transmission of data.

In one or more example methods, determining the one particular resource configuration comprises determining the one particular resource configuration based on the LPD’s synchronization capability. Determining the one particular resource configuration based on the LPD’s synchronization capability may allow transmission of data by the LPD with certain delay allowance, such as following the transmission pattern of the LPD. For example, an LPD with a low synchronization capability may have a longer delay allowance on a data transmission, such as on an UL transmission.

The method 100 comprises transmitting S106, to the LPD, a grant to use one, such as at least one, particular resource configuration out of the one or more required resource configurations for transmission of data. In one or more example methods, a plurality of resource configurations may be granted for different types of data transmissions, such as different types of reporting, from the LPD. In one or more example methods, the grant indicates particular resources, such as a resource subset, such as a one or more resources of a transmission opportunity, out of the resources configured by the predetermined resource configurations. In one or more example methods, the grant comprises one or more of a parameter of the resource configuration, a flag, and an index indicative of particular transmission resources for the LPD to use for data transmission. In one or more example methods, the grant comprises a set of parameters associated with the particular resource configuration. The set of parameters associated with the particular resource configuration may allow the LPD to determine the particular resource configuration to use for transmission of data. The set of parameters may implicitly indicate the particular resource configuration, for example by indicating a parameter and/or a combination pf parameters specific for that particular resource configuration and not comprised in any of the other resource configurations. In one or more example methods, the grant to use one particular resource configuration can be seen as an indication of a particular predetermined resource configuration for a periodic data transmission and/or a trigger-based transmission. In other words, the grant may indicate a transmission opportunity, such as a subset of resources out of the resources indicated in the predetermined resource configurations, that the LPD is to use for its data transmission. In one or more example methods, the parameter of the resource configuration, such as the set of parameters of the resource configuration, may be indicative of one or more of a subset of the resources of the time window, such as the UTW, that can be used by the LPD for data transmission, a modulation scheme and/or a coding scheme.

A trigger based transmission may comprise an event based transmission and/or a receiver initiated transmission. By transmitting the grant to use one particular resource configuration out of the predetermined resource configurations, a signalling overhead can be reduced since the LPD does not require to receive a full resource configuration for every required data transmission. In one or more example methods, the grant may be transmitted during a channel access procedure, such as a RACH-procedure, without LPD entering RRC connected mode. The grant may be a dedicated transmission from the wireless node to a specific LPD. The grant may configure in which transmission opportunities in the time window, such as in the UTW, the LPD is to transmit based on the LPDs capabilities. This step S106 corresponds to step S206 of Fig. 4 and the signalling 510 of Fig. 7.

The method 100 comprises receiving S108 data from the LPD based on the granted resource configuration, such as in the resources associated with, such as indicated in, the granted resource configuration. The data received may comprise one or more of: flag indicating type of data, user data, control data, sensor data, measurement data, assistance data, and reporting data. This step S108 corresponds to step S208 of Fig. 4 and the signalling 516 of Fig. 7.

In one or more example methods, the method comprises receiving S110, from the LPD, information indicative of a change in radio channel conditions at the LPD. In one or more example methods, the LPD may request an update on the particular resource configuration for performing an upcoming transmission of data. This may for example be the case when the LPD has determined a change in radio channel conditions. In one or more example methods, the information indicative of a change in radio channel conditions at the LPD may comprise information indicative of one or more resource configurations for UL transmission required, such as requested, and/or selected, and/or supported, and/or implemented, by the LPD. This step S110 corresponds to step S210 of Fig. 4 and the signalling 518 of Fig. 7.

In one or more example methods, the method comprises transmitting S112, based on the information indicative of the change in radio channel conditions, information indicative of one or more resource configurations, such as a second particular resource configuration, to be used for data transmission under the changed radio channel conditions. In one or more example methods, the information indicative of the one or more resource configurations can comprise a resource configuration parameter enabling partial changes of the granted resource configuration, such as the current resource configuration of the LPD. Such parameters may be one or more of: a modulation scheme and a coding scheme. In one or more example methods, transmitting the information indicative of the one or more resource configurations to be used for data transmission under the changed radio channel conditions comprises transmitting the information via an upper layer. The wireless node may, in one or more example methods, perform a partial change of the current configuration, such as assign a new parameter of the configuration. For example, the information can comprise a new modulation and/or coding scheme to be used by the LPD for data transmission. This step S112 corresponds to step S212 of Fig. 4 and the signalling 520 of Fig. 7.

Fig. 4 is a flow-chart illustrating an example method 200, performed in a LPD according to this disclosure, for enabling transmission of data from the LPD. The LPD is the LPD described herein, such as LPD 300 of Fig. 1 , Fig. 6, and Fig. 7.

In one or more example methods, the method 200 comprises receiving S202, from a wireless node, information indicative of predetermined resource configurations, such as a generic resource configuration, for uplink transmission by LPDs. The predetermined resource configuration may be the predetermined resource configuration of Fig. 2. The predetermined resource configuration may be indicative of one or more time window(s) for transmission of data from LPDs. In one or more example methods, each time window may comprise one or more transmission opportunities for transmission of data. In one or more example methods, the one or more predetermined resource configurations comprise resources for uplink and/or sidelink transmission. This step S202 corresponds to step S102 of Fig. 3 and the signalling 506 of Fig.

7.

In one or more example methods, the predetermined resource configurations for uplink transmission by LPDs are preconfigured in the LPD. In this case, the predetermined resource configuration may not be received from the wireless node.

The method 200 comprises transmitting S204, to the wireless node, information indicative of one or more resource configurations for UL transmission required by the LPD. The one or more resource configurations may be a subset of predetermined resource configurations for uplink transmission by LPD. In one or more example methods, the information indicative of one or more resource configurations for UL transmission required by the LPD comprises one or more of a device type of the LPD, an identifier identifying the LPD, and a transmission pattern of the LPD. The transmission pattern may be a data traffic pattern from the LPD. The data traffic pattern may be dependent on a reporting type and/or an application run by the LPD.

In one or more example methods, the information indicative of the predetermined resource configurations for uplink transmission by LPDs comprises one or more transmission pattern(s). The one or more transmission pattern may be used for one or more of data transmission and transmission of the information indicative of one or more resource configurations for UL transmission required by the LPD. This step S204 corresponds to step S104 of Fig. 3 and the signalling 508 of Fig. 7.

The method 200 comprises receiving S206, from the wireless node, a grant to use one particular resource configuration out of the one or more indicated resource configurations for transmission of data. In one or more example methods, the grant comprises one or more of a parameter of the resource configuration, a flag, and an index indicative of the particular resource configuration. In one or more example methods, the grant indicates the resources out of the predetermined resource configurations for uplink transmission to be used by the LPD for data transmission. The present disclosure may allow an LPD to synchronize periodic UL reporting according to the determined particular resource configuration. The present disclosure may allow an LPD to operate based on a predetermined DTX pattern and/or an DTX operation. In one or more example methods, the one particular resource configuration can be associated with the DTX operation. For example, as illustrated in Fig. 2, the one particular resource configuration may be associated with a certain DTX pattern when a periodic transmission of data is required by the LPD. This step S206 corresponds to step S106 of Fig. 3 and the signalling 510 of Fig. 7.

The method 200 comprises transmitting S208 data based on the granted resource configuration, such as in the resources associated with, such as indicated in, the granted resource configuration. The data received may comprise one or more of: flag indicating type of data, user data, control data, sensor data, measurement data, assistance data, and reporting data. In one or more example methods, the LPD may transmit the data via a sidelink, such as via a PC5 interface, or via Uplink, such as via a Uu interface. This step S208 corresponds to step S108 of Fig. 3 and the signalling 510 of Fig. 7.

In one or more example methods, the method comprises determining S209 whether radio channel conditions for transmission of the data have changed. In one or more example methods, the radio channel conditions for the LPD may change due to changes in the environment or the LPD’s movement, which may affect the wireless channel properties and/or the radio channel characteristics. If there are major changes in the radio channel conditions, then the granted resource configuration may no longer be valid. By determining a change in the radio channel conditions, the LPD may check whether the resource configuration currently used for transmission of data is valid. The LPD may determine a change in the propagation conditions by monitoring a Signal-to-Noise-Ratio (SNR) or a received signal strength (RSS) and determining whether the SNR or RSS changes. Monitoring the SNR or RSS may comprise measuring the SNR or RSS. Monitoring the SNR or RSS may comprise comparing the measured SNR or RSS with a previously measured SNR or RSS.

In one or more example methods, the method comprises, upon determining that the radio channel conditions have changed, transmitting S210, to the wireless node, information indicative of a change in radio channel conditions at the LPD. This step S210 corresponds to step S110 of Fig. 3 and the signalling 518 of Fig. 7.

In one or more example methods, the method comprises receiving S212, from the wireless node, based on the information indicative of the change in radio channel conditions, information indicative of one or more resource configurations, such as one or more second particular resource configurations, to be used for data transmission under the changed radio channel conditions. This step S212 corresponds to step S112 of Fig. 3 and the signalling 520 of Fig. 7.

In one or more example methods, the method comprises, upon determining that the radio channel conditions have changed, selecting S214 a resource configuration to be used for data transmission under the changed radio channel conditions from one or more of: the predetermined resource configurations, and the one or more indicated resource configurations. In one or more example methods, upon detecting a change in the radio channel conditions, the LPD can adjust its parameters to the new radio channel condition. In one or more example methods, there may be preconfigured adjustments to this new condition available to the LPD, for example by being comprised in the information indicative of predetermined resource configurations received from the wireless node in S202. The LPD may select the adjusted resource configuration and may transmit, to the wireless node, an identifier identifying the adjusted resource configuration used by the LPD. This step S214 corresponds to the signalling 522 of Fig. 7.

In one or more example methods, the method comprises transmitting data using the resource configuration to be used for data transmission under the changed radio channel conditions.

Fig. 5 shows a block diagram of an example wireless node 700 according to the disclosure. The wireless node 700 comprises memory circuitry 701 , processor circuitry 702, and a wireless interface 703. The wireless node 700 may be configured to perform any of the methods disclosed in Fig. 3. In other words, the wireless node 700 may be configured for enabling transmission of data from an LPD. The wireless node 700 may be one or more of a radio network node, such as radio network node 400 of Fig. 1 , and a master wireless device, such as wireless device 300A of Fig. 1. The wireless node 700 is configured to communicate with an LPD, such as the LPD disclosed herein, using a wireless communication system.

The wireless node 700 is configured to receive (such as via the wireless interface 703), from the LPD, information indicative of one or more resource configurations for UL transmission required by the LPD. The one or more resource configurations is a subset of predetermined resource configurations for uplink transmission by LPDs.

The wireless node 700 is configured to transmit (such as via the wireless interface 703), to the LPD, a grant to use one particular resource configuration out of the one or more required resource configurations for transmission of data.

The wireless node 700 is configured to receive (such as via the wireless interface 703) the data from the LPD based on the granted resource configuration.

The wireless interface 703 is configured for wireless communications via a wireless communication system, such as a 3GPP system, such as a 3GPP system supporting one or more of: 6G or beyond radio system, New Radio (NR), Long Term Evolution (LTE), Narrow-band loT (NB-loT), and Long Term Evolution - enhanced Machine Type Communication (LTE-M), and 3GPP system operated in licensed bands or unlicensed bands.

Processor circuitry 702 is optionally configured to perform any of the operations disclosed in Fig. 3 (such as any one or more of: S102, S104, S105, S106, S108, S110, S112). The operations of the wireless node 700 may be embodied in the form of executable logic routines (for example, lines of code, software programs, etc.) that are stored on a non-transitory computer readable medium (for example, memory circuitry 701 ) and are executed by processor circuitry 702.

Furthermore, the operations of the wireless node 700 may be considered a method that the wireless node 700 is configured to carry out. Also, while the described functions and operations may be implemented in software, such functionality may also be carried out via dedicated hardware or firmware, or some combination of hardware, firmware and/or software.

Memory circuitry 701 may be one or more of: a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, a random access memory (RAM), and any other suitable device. In a typical arrangement, memory circuitry 701 may include a non-volatile memory for long term data storage and a volatile memory that functions as system memory for processor circuitry 702. Memory circuitry 701 may exchange data with processor circuitry 702 over a data bus. Control lines and an address bus between memory circuitry 701 and processor circuitry 702 also may be present (not shown in Fig. 5). Memory circuitry 701 is considered a non-transitory computer readable medium.

Memory circuitry 701 may be configured to store the information indicative of one or more resource configurations for UL transmission required by the LPD, the data, information indicative of a change in radio channel conditions at the LPD in a part of the memory.

Fig. 6 shows a block diagram of an example LPD 300 according to the disclosure. The LPD 300 comprises memory circuitry 301 , processor circuitry 302, and a wireless interface 303. The LPD 300 may be configured to perform any of the methods disclosed in Fig. 3. In other words, the LPD 300 may be configured for enabling transmission of data from the LPD. An LPD may be one or more of: an energy harvesting device and an ambient loT device. Put differently, an LPD may be one or more of: a power constrained loT device, such as an ambient loT device, and a low power device with small batteries, such as a zero-power and/or a zero-energy device.

The LPD 300 is configured to communicate with a wireless node, such as the wireless node disclosed herein, using a wireless communication system.

The LPD 300 is configured to transmit (such as via the wireless interface 303), to the wireless node, information indicative of one or more resource configurations for UL transmission required by the LPD. The one or more resource configurations is a subset of predetermined resource configurations for uplink transmission by LPD.

The LPD 300 is configured to receive (such as via the wireless interface 303), from the wireless node, a grant to use one particular resource configuration out of the one or more required resource configurations for transmission of data.

The LPD 300 is configured to transmit (such as via the wireless interface 303) the data based on the granted resource configuration.

The wireless interface 303 is configured for wireless communications via a wireless communication system, such as a 3GPP system, such as a 3GPP system supporting one or more of: 6G or beyond radio system, New Radio (NR), Long Term Evolution (LTE), Narrow-band loT (NB-loT), and Long Term Evolution - enhanced Machine Type Communication (LTE-M), and 3GPP system operated in licensed bands or unlicensed bands.

The LPD 300 is optionally configured to perform any of the operations disclosed in Fig. 4 (such as any one or more of: S202, S204, S206, S208, S209, S210, S212, S214). The operations of the LPD 300 may be embodied in the form of executable logic routines (for example, lines of code, software programs, etc.) that are stored on a non-transitory computer readable medium (for example, memory circuitry 302) and are executed by processor circuitry 302.

Furthermore, the operations of the LPD 300 may be considered a method that the LPD 300 is configured to carry out. Also, while the described functions and operations may be implemented in software, such functionality may also be carried out via dedicated hardware or firmware, or some combination of hardware, firmware and/or software.

Memory circuitry 301 may be one or more of: a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, a random access memory (RAM), and any other suitable device. In a typical arrangement, memory circuitry 301 may include a non-volatile memory for long term data storage and a volatile memory that functions as system memory for processor circuitry 302. Memory circuitry 301 may exchange data with processor circuitry 302 over a data bus. Control lines and an address bus between memory circuitry 301 and processor circuitry 302 also may be present (not shown in Fig. 6). Memory circuitry 301 is considered a non-transitory computer readable medium.

Memory circuitry 301 may be configured to a grant to use one particular resource configuration, information indicative of one or more resource configurations to be used for data transmission under the changed radio channel conditions in a part of the memory.

Fig. 7 is a signalling diagram 500 illustrating an example communication between a low power device 300 and a wireless node 700 according to this disclosure. The wireless node 700 may be one or more of a radio network node (e.g., communicating with the LPD via a Uu interface) and a master wireless device (e.g., communicating with the LPD via a PC5 interface). The master wireless device may further communicate to a radio network node or operate stand-alone without communication to a radio network node at a given time.

In one or more examples, the LPD 300 is preconfigured with one or more predetermined resource configurations 502 by a node in the network, such as wireless node 700. For example, the LPD 300 is preconfigured with the one or more predetermined resource configurations 502 at fabrication and/or by hardware design. In other words, the one or more predetermined resource configurations 502 may be hardcoded in the LPD 300. The one or more predetermined resource configurations 502 may be stored in a memory of the LPD 300. In one or more examples, the LPD 300 is preconfigured comprises with the one or more predetermined resource configurations 502, such as with a preconfigured resource pattern, with a certain identifier. For example, one or more of the one or more predetermined resource configurations 502 can be assigned to the LPD 300 based on the traffic characteristics. There may be multiple configurations depending on the supported traffic characteristics of the LPD 300. In one or more examples, the wireless node 700 stores the same information, such as the one or more predetermined resource configurations 502.

In one or more examples, such as when the LPD 300 has not been preconfigured with the predetermined resource configurations 502, the wireless node 700 broadcasts information indicative of predetermined resource configurations 506 for uplink transmission by LPDs. For example, the wireless node 700 transmits the information indicative of predetermined resource configurations 506 to a group of LPDs and/or a plurality of LPDs. In other words, the wireless node 700 may broadcast a generic resource configuration. For example, the wireless node 700 broadcasts information indicating a set of resources the LPD 300 can use to transmit information indicative of one or more resource configurations 508 for UL transmission required by the LPD. For example, the wireless node can broadcast such information according to predetermined resource configurations 502. For example, the wireless node 700 can broadcast a resource configuration supported by the LPD that can access the wireless node resources.

In one or more examples, the predetermined resource configurations 502 for uplink transmission by LPDs are preconfigured in the LPD 300. In one or more examples, a predetermined resource configuration, such as of the predetermined resource configurations 502 or 506, is indicative of a time window for transmission of data from LPDs, such as indicative of a UTW. In one or more examples, the time window comprises one or more transmission opportunities for transmission of data. In other words, the predetermined resource configurations 502, 506 may be indicative of one or more of: a window size, and an offset and/or an index identifying the location of each transmission opportunity within time window.

The LPD 300 transmits, to the wireless node 700, the information indicative of one or more resource configurations 508 for UL transmission required by the LPD 300, herein also referred to required resource configurations. The one or more resource configurations required by the LPD may be determined based on the capability of the LPD and/or based on channel conditions for the LPD. The one or more resource configurations 508 is a subset of predetermined resource configurations 502 and/or 506 for uplink transmission by LPDs. Transmitting the information indicative of one or more resource configurations 508 for UL transmission required by the LPD 300 may be seen as transmitting a registration message to the wireless node 700. For example, the LPD 300 performs such registration when the resource configuration required by the LPD 300 is supported by the wireless node 700. In one or more examples, the information indicative of one or more resource configurations 508 for UL transmission required by the LPD 300 may be seen as a request to use one or more resource configurations 508 from the subset of predetermined resource configurations 506 for uplink transmission by LPDs. For example, there is no need for RRC signalling to set up the connection between the LPD 300 and wireless node 700 for transmission of the registration message. In other words, the LPD 300 transmits, to the wireless node 700, the information indicative of one or more resource configurations 508 for UL transmission required by the LPD 300 without entering in RRC connected mode. In another example, in case the predetermined resource configurations 506 is not supported by the LPD 300 then the LPD 300 may not transmit 508. In one or more example methods, the LPD may determine the channel conditions prior to selecting the resource configuration 508 required by the LPD 300. In one or more examples, the LPD 300 determines the radio channel conditions for transmission of data by performing signal-to-noise ratio (SNR) measurements.

In one or more examples, the information indicative of one or more resource configurations 508 for UL transmission required by the LPD 300 comprises one or more of: a device type of the LPD, an identifier identifying the LPD 300, and a transmission pattern of the LPD 300. In one or more examples, the information indicative of one or more resource configurations 508 for UL transmission required by the LPD 300 can comprise a traffic type of the LPD 300, the traffic type being indicative of a pilot size and/or an interface of the LPD 300. For example, the traffic type parameter may indicate quality and importance of the data to be transmitted.

For example, the identifier identifying the LPD 300 can be either a temporary identifier or a permanent identifier. For example, the device type of the LPD 300 can be indicative of certain characteristics of the LPD 300. For example, the device type of the LPD 300 can indicate synchronization capabilities of the LPD 300. In other words, the device type of the LPD 300 can indicate whether the circuitry of the LPD 300 is fully passive, semi-active, or fully active. In one or more examples, the transmission pattern can be indicative of a periodicity associated with UL transmissions performed by the LPD 300. For example, the transmission pattern can indicate that the LPD 300 requires resources to be used for UL transmission at certain times. In one or more examples, the information indicative of one or more resource configurations 508 for UL transmission required by the LPD 300 can comprise an identifier identifying a preconfigured resource that the LPD 300 intends to use for UL transmission. Optionally, the LPD 300 can transmit, to the wireless node 700, a capability message indicating the one or more of: a device type of the LPD, an identifier identifying the LPD 300, and a transmission pattern of the LPD 300. Such capability message may implicitly indicate resource configurations that are preconfigured for the LPD 300, such as resource configurations required by the LPD 300.

In one or more examples, the wireless node 700 is a radio network node. The wireless node 700 transmits, to the LPD 300, a grant 510 to use one particular resource configuration out of the one or more required resource configurations 508 for transmission of data. In one or more examples, the wireless node 700 confirms the registration of the LPD 300. In one or more examples, the wireless node 700 transmits, to the LPD 300, the one particular resource configuration to be used by the LPD 300 for transmitting data with the grant 510.

In one or more examples, the LPD 300 may acquire 512 the one particular resource configuration based on the grant 510, such as from the stored predetermined resource configurations 502.

In one or more example methods, the LPD 300 can obtain 514 data to be transmitted via an upper layer or from a transmit buffer.

The LPD 300 transmits data 516 based on the granted resource configuration 510. In other words, the LPD 300 starts UL transmission based on the granted resource configuration 510.

In one or more examples, the LPD 300 verifies whether the granted resource configuration is valid to be used in an upcoming UL transmission, for example by determining whether there is a change in radio channel conditions. For example, the radio channel conditions for the LPD 300 may change due to changes in the environment where the LPD 300 is located and/or due to LPD movement which may affect the wireless channel properties. The granted resource configuration may therefore not be valid to be used in an upcoming UL transmission. In one or more examples, the LPD 300 determines 517 whether radio channel conditions for transmission of the data have changed. In one or more examples, the LPD 300 determines 517 whether radio channel conditions for transmission of the data have changed by performing signal-to- noise ratio (SNR) measurements.

In one or more examples, the LPD 300 determines that radio channel conditions for transmission of the data have not changed. In other words, the LPD 300 may verify that the granted resource configuration is valid to be used in an upcoming UL transmission and may proceed to transmit data with the current granted resource configuration.

In one or more examples, the LPD 300 determines that radio channel conditions for transmission of the data have changed. Upon determining that the radio channel conditions have changed the LPD 300 transmits, to the wireless node 700, information 518 indicative of a change in radio channel conditions at the LPD 300. In one or more example methods, the information 518 may be a request for new granted resource configurations based on the new radio channel conditions.

In one or more examples, the LPD 300 receives, from the wireless node 700, based on the information indicative of the change in radio channel conditions, information indicative of one or more adapted resource configurations 520 to be used for data transmission under the changed radio channel conditions. The information indicative of the one or more adapted resource configurations 520 to be used for data transmission under the changed radio channel conditions may be received in a second grant, such as an adapted grant, from the wireless node 700. The second grant may replace the first grant 510. In other words, the LPD 300 receives information indicative of one or more resource configurations 520 to be used for an upcoming UL transmission under the changed radio channel conditions. For example, the information indicative of one or more resource configurations 520 can comprise a parameter enabling partial changes of the granted resource configuration 510, such as the current configuration. Such parameter may be one or more of: a modulation scheme and a coding scheme.

In one or more example, the LPD may, upon determining that the radio channel conditions have changed, select 522 a resource configuration to be used for data transmission under the changed radio channel conditions from one or more of: the predetermined resource configurations, and the one or more indicated resource configurations. The resource selection 522 corresponds to the step 214 of Fig. 4.

In one or more examples, the LPD 300 transmits data 524 based on the information indicative of one or more adapted resource configurations 520. In other words, the LPD 300 transmits data 524 using the adapted resource configuration 520.

Optionally, the LPD 300, upon determining that the radio channel conditions have changed, can select one or more resource configurations to be used for data transmission under the changed radio channel conditions from one or more of: the predetermined resource configurations 506, and the one or more required resource configurations 508. Put differently, the LPD 300 can adjust the granted resource configuration 510 according to the new radio channel conditions at the LPD, without receiving an indication of the adapted resource configuration from the wireless node. In one or more examples, the information indicative of predetermined resource configurations 506 for uplink transmission by LPDs can comprise one or more adjustments to new radio channel conditions. In one or more example methods, the LPD 300 transmits, to the wireless node 700, an identifier identifying the newly preconfigured resources to be used for the upcoming UL transmission.

In one or more examples, the LPD 300 transmits data 524 using the newly preconfigured resources.

Examples of methods and products (wireless node and low power node) according to the disclosure are set out in the following items: Item 1 . A method, performed by a wireless node, for enabling transmission of data from a low power device, LPD, the method comprising: receiving (S104), from the LPD, information indicative of one or more resource configurations for uplink, UL, transmission required by the LPD, wherein the one or more resource configurations is a subset of predetermined resource configurations for uplink transmission by LPDs, transmitting (S106), to the LPD, a grant to use one particular resource configuration out of the one or more required resource configurations for transmission of data, and receiving (S108) data from the LPD based on the granted resource configuration.

Item 2. The method according to Item 1 , wherein the grant comprises one or more of a parameter of the resource configuration, a flag, and an index indicative of particular transmission resources.

Item 3. The method according to any one of the previous Items, wherein the grant indicates a resource subset out of the resources configured by the predetermined resource configurations for uplink transmission to be used by the LPD for data transmission.

Item 4. The method according to any one of the previous Items, wherein the method comprises broadcasting (S102) information indicative of predetermined resource configurations for uplink transmission by LPDs.

Item 5. The method according to Item 4, wherein the information indicative of the predetermined resource configurations for uplink transmission by LPDs comprises one or more transmission pattern(s).

Item 6. The method according to Item 5, wherein the one or more transmission pattern is to be used for one or more of data transmission and transmission of the information indicative of one or more resource configurations for UL transmission required by the LPD.

Item 7. The method according to any one of the Items 1 to 3, wherein the predetermined resource configurations for uplink transmission by LPDs are preconfigured in the LPD. Item 8. The method according to any one of the previous Items, wherein the predetermined resource configuration is indicative of a time window for transmission of data from LPDs.

Item 9. The method according to Item 8, wherein the time window comprises one or more transmission opportunities for transmission of data.

Item 10. The method according to any one of the previous Items, wherein the one or more predetermined resource configurations comprise resources for uplink and/or sidelink transmission.

Item 11. The method according to any one of the previous Items, wherein the information indicative of one or more resource configurations for UL transmission required by the LPD comprises one or more of: a device type of the LPD, an identifier identifying the LPD, and a transmission pattern of the LPD.

Item 12. The method according to any one of the previous Items, wherein the method comprises: determining (S105), based on the information received from the LPD, a resource configuration indicative of resource to be used by the LPD for transmission of data.

Item 13. The method according to any one of the previous Items, wherein the method comprises: receiving (S110), from the LPD, information indicative of a change in radio channel conditions at the LPD, and transmitting (S112), based on the information indicative of the change in radio channel conditions, information indicative of one or more resource configurations to be used for data transmission under the changed radio channel conditions.

Item 14. A method, performed by a low power device, LPD, for enabling transmission of data from the LPD, the method comprising: transmitting (S204), to a wireless node, information indicative of one or more resource configurations for uplink, UL, transmission required by the LPD, wherein the one or more resource configurations is a subset of predetermined resource configurations for uplink transmission by LPD, receiving (S206), from the wireless node, a grant to use one particular resource configuration out of the one or more indicated resource configurations for transmission of data, and transmitting (S208) data based on the granted resource configuration.

Item 15. The method according to Item 14, wherein the grant comprises one or more of a parameter of the resource configuration, a flag, and an index indicative of the particular resource configuration.

Item 16. The method according to any one of Items 14-15, wherein the grant indicates the resources out of the predetermined resource configurations for uplink transmission to be used by the LPD for data transmission.

Item 17. The method according to any one of Items 14-16, wherein the method comprises receiving (S202), from the wireless node, information indicative of predetermined resource configurations for uplink transmission by LPDs.

Item 18. The method according to Item 17, wherein the information indicative of the predetermined resource configurations for uplink transmission by LPDs comprises one or more transmission pattern(s).

Item 19. The method according to Item 18, wherein the one or more transmission pattern is to be used for one or more of data transmission and transmission of the information indicative of one or more resource configurations for UL transmission required by the LPD.

Item 20. The method according to any one of Items 14-19, wherein the predetermined resource configurations for uplink transmission by LPDs are preconfigured in the LPD.

Item 21. The method according to any one of Items 14-20, wherein the predetermined resource configuration is indicative of a time window for transmission of data from LPDs.

Item 22. The method according to Item 21 , wherein the time window comprises one or more transmission opportunities for transmission of data. Item 23. The method according to any one of the Items 14-22, wherein the one or more predetermined resource configurations comprise resources for uplink and/or sidelink transmission.

Item 24. The method according to any one of the Items 14-23, wherein the information indicative of one or more resource configurations for UL transmission required by the LPD comprises one or more of a device type of the LPD, an identifier identifying the LPD, and a transmission pattern of the LPD.

Item 25. The method according to any one of Items 14-24, wherein the method comprises: determining (S209) whether radio channel conditions for transmission of the data have changed.

Item 26. The method according to Item 25, wherein the method comprises: upon determining that the radio channel conditions have changed, transmitting (S210), to the wireless node, information indicative of a change in radio channel conditions at the LPD, and receiving (S212), from the wireless node, based on the information indicative of the change in radio channel conditions, information indicative of one or more resource configurations to be used for data transmission under the changed radio channel conditions.

Item 27. The method according to Item 25, wherein the method comprises: upon determining that the radio channel conditions have changed, selecting (S214) a resource configuration to be used for data transmission under the changed radio channel conditions from one or more of: the predetermined resource configurations, and the one or more indicated resource configurations.

Item 28. A wireless node comprising memory circuitry, processor circuitry, and a wireless interface, wherein the wireless node is configured to perform any of the methods according to any of Items 1-13.

Item 29. A low power device comprising memory circuitry, processor circuitry, and a wireless interface, wherein the low power device is configured to perform any of the methods according to any of Items 14-27. The use of the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. does not imply any particular order, but are included to identify individual elements. Moreover, the use of the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. does not denote any order or importance, but rather the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. are used to distinguish one element from another. Note that the words “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. are used here and elsewhere for labelling purposes only and are not intended to denote any specific spatial or temporal ordering. Furthermore, the labelling of a first element does not imply the presence of a second element and vice versa.

It may be appreciated that Figures 1-7 comprise some circuitries or operations which are illustrated with a solid line and some circuitries, components, features, or operations which are illustrated with a dashed line. Circuitries or operations which are comprised in a solid line are circuitries, components, features or operations which are comprised in the broadest example. Circuitries, components, features, or operations which are comprised in a dashed line are examples which may be comprised in, or a part of, or are further circuitries, components, features, or operations which may be taken in addition to circuitries, components, features, or operations of the solid line examples. It should be appreciated that these operations need not be performed in order presented. Furthermore, it should be appreciated that not all of the operations need to be performed. The example operations may be performed in any order and in any combination. It should be appreciated that these operations need not be performed in order presented. Circuitries, components, features, or operations which are comprised in a dashed line may be considered optional.

Other operations that are not described herein can be incorporated in the example operations. For example, one or more additional operations can be performed before, after, simultaneously, or between any of the described operations.

Certain features discussed above as separate implementations can also be implemented in combination as a single implementation. Conversely, features described as a single implementation can also be implemented in multiple implementations separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations, one or more features from a claimed combination can, in some cases, be excised from the combination, and the combination may be claimed as any sub-combination or variation of any sub-combination. It is to be noted that the word "comprising" does not necessarily exclude the presence of other elements or steps than those listed. It is to be noted that the words "a" or "an" preceding an element do not exclude the presence of a plurality of such elements.

It should further be noted that any reference signs do not limit the scope of the claims, that the examples may be implemented at least in part by means of both hardware and software, and that several "means", "units" or "devices" may be represented by the same item of hardware.

Language of degree used herein, such as the terms “approximately,” “about,” “generally,” and “substantially” as used herein represent a value, amount, or characteristic close to the stated value, amount, or characteristic that still performs a desired function or achieves a desired result. For example, the terms “approximately”, “about”, “generally,” and “substantially” may refer to an amount that is within less than or equal to 10% of, within less than or equal to 5% of, within less than or equal to 1% of, within less than or equal to 0.1 % of, and within less than or equal to 0.01% of the stated amount. If the stated amount is 0 (e.g., none, having no), the above recited ranges can be specific ranges, and not within a particular % of the value.

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

Although features have been shown and described, it will be understood that they are not intended to limit the claimed disclosure, and it will be made obvious to those skilled in the art that various changes and modifications may be made without departing from the scope of the claimed disclosure. The specification and drawings are, accordingly, to be regarded in an illustrative rather than restrictive sense. The claimed disclosure is intended to cover all alternatives, modifications, and equivalents.

Claims

1 . A method, performed by a wireless node, for enabling transmission of data from a low power device, LPD, the method comprising: receiving (S104), from the LPD, information indicative of one or more resource configurations for uplink, UL, transmission required by the LPD, wherein the one or more resource configurations is a subset of predetermined resource configurations for uplink transmission by LPDs, transmitting (S106), to the LPD, a grant to use one particular resource configuration out of the one or more required resource configurations for transmission of data, and receiving (S108) data from the LPD based on the granted resource configuration.

2. The method according to claim 1 , wherein the grant comprises one or more of a parameter of the resource configuration, a flag, and an index indicative of the particular transmission resource.

3. The method according to any one of the previous claims, wherein the grant indicates a resource subset out of the resources configured by the predetermined resource configurations for uplink transmission to be used by the LPD for data transmission.

4. The method according to any one of the previous claims, wherein the method comprises broadcasting (S102) information indicative of predetermined resource configurations for uplink transmission by LPDs.

5. The method according to claim 4, wherein the information indicative of the predetermined resource configurations for uplink transmission by LPDs comprises one or more transmission pattern(s).

6. The method according to claim 5, wherein the one or more transmission pattern is to be used for one or more of data transmission and transmission of the information indicative of one or more resource configurations for UL transmission required by the LPD.

7. The method according to any one of the claims 1 to 6, wherein the predetermined resource configurations for uplink transmission by LPDs are preconfigured in the LPD.

8. The method according to any one of the previous claims, wherein the predetermined resource configuration is indicative of a time window for transmission of data from LPDs.

9. The method according to claim 8, wherein the time window comprises one or more transmission opportunities for transmission of data.

10. The method according to any one of the previous claims, wherein the one or more predetermined resource configurations comprise resources for uplink and/or sidelink transmission.

11 . The method according to any one of the previous claims, wherein the information indicative of one or more resource configurations for UL transmission required by the LPD comprises one or more of: a device type of the LPD, an identifier identifying the LPD, and a transmission pattern of the LPD.

12. The method according to any one of the previous Items, wherein the method comprises: determining (S105), based on the information received from the LPD, a resource configuration indicative of resource to be used by the LPD for transmission of data.

13. The method according to any one of the previous claims, wherein the method comprises: receiving (S110), from the LPD, information indicative of a change in radio channel conditions at the LPD, and transmitting (S112), based on the information indicative of the change in radio channel conditions, information indicative of one or more resource configurations to be used for data transmission under the changed radio channel conditions.

14. A method, performed by a low power device, LPD, for enabling transmission of data from the LPD, the method comprising: transmitting (S204), to a wireless node, information indicative of one or more resource configurations for uplink, UL, transmission required by the LPD, wherein the one or more resource configurations is a subset of predetermined resource configurations for uplink transmission by LPD, receiving (S206), from the wireless node, a grant to use one particular resource configuration out of the one or more indicated resource configurations for transmission of data, and transmitting (S208) data based on the granted resource configuration.

15. The method according to claim 14, wherein the grant comprises one or more of a parameter of the resource configuration, a flag, and an index indicative of the particular resource configuration.

16. The method according to any one of claims 14-15, wherein the grant indicates the resources out of the predetermined resource configurations for uplink transmission to be used by the LPD for data transmission.

17. The method according to any one of claims 14-16, wherein the method comprises receiving (S202), from the wireless node, information indicative of predetermined resource configurations for uplink transmission by LPDs.

18. The method according to claims 17, wherein the information indicative of the predetermined resource configurations for uplink transmission by LPDs comprises one or more transmission pattern(s).

19. The method according to claim 18, wherein the one or more transmission pattern is to be used for one or more of data transmission and transmission of the information indicative of one or more resource configurations for UL transmission required by the LPD.

20. The method according to any one of claims 14-19, wherein the predetermined resource configurations for uplink transmission by LPDs are preconfigured in the LPD.

21. The method according to any one of claims 14-20, wherein the predetermined resource configuration is indicative of a time window for transmission of data from LPDs.

22. The method according to claim 21 , wherein the time window comprises one or more transmission opportunities for transmission of data.

23. The method according to any one of the claims 14-22, wherein the one or more predetermined resource configurations comprise resources for uplink and/or sidelink transmission.

24. The method according to any one of the claims 14-23, wherein the information indicative of one or more resource configurations for UL transmission required by the LPD comprises one or more of a device type of the LPD, an identifier identifying the LPD, and a transmission pattern of the LPD.

25. The method according to any one of claims 14-24, wherein the method comprises: determining (S209) whether radio channel conditions for transmission of the data have changed.

26. The method according to any of claims 14-25, wherein the method comprises determining (S209) whether radio channel conditions for transmission of the data have changed, upon determining that the radio channel conditions have changed, transmitting (S210), to the wireless node, information indicative of a change in radio channel conditions at the LPD, and receiving (S212), from the wireless node, based on the information indicative of the change in radio channel conditions, information indicative of one or more resource configurations to be used for data transmission under the changed radio channel conditions, or upon determining that the radio channel conditions have changed, selecting (S214) a resource configuration to be used for data transmission under the changed radio channel conditions from one or more of: the predetermined resource configurations, and the one or more indicated resource configurations.