Devices and methods for communication
A communication method for low-power IoT devices optimizes slot access and configuration changes using energy harvesting, addressing inefficiencies in existing cellular devices and enhancing power efficiency.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2026-04-02
AI Technical Summary
Existing cellular devices are not suitable for battery-less or low-energy storage IoT devices due to high peak power consumption, which exceeds the energy harvesting capabilities of ambient radio waves.
Implementing a communication method that includes receiving slot start indications, detecting preambles for configuration changes, applying paging re-indications, and transmitting on physical device channels, all optimized for low-power devices using energy harvesting.
Enhances communication efficiency and reduces power consumption in battery-less or low-energy storage IoT devices by optimizing slot access and configuration adjustments, allowing reliable operation with ambient energy sources.
Smart Images

Figure CN2024123079_02042026_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS FOR COMMUNICATION
[0001] FIELDS
[0002] Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for ambient internet of thing (IoT) .BACKGROUND
[0003] Internet of Things, or IoT, is a network of physical devices. These devices can transfer data to one another without human intervention. The automation and digitalization of various industries open numbers of new markets requiring new IoT technologies of supporting battery-less devices with no energy storage capability or devices with energy storage that do not need to be replaced or recharged manually. It may consider devices being either battery-less or with limited energy storage capability (i.e., using a capacitor) and the energy is provided through the harvesting of radio waves, light, motion, heat, or any other power source that could be seen suitable. Considering the limited size and complexity required by practical applications for battery -less devices with no energy storage capability or devices with limited energy storage that do not need to be replaced or recharged manually, the output power of energy harvester is typically from 1 μW to a few hundreds of μW. Existing cellular devices may not work well with energy harvesting due to their peak power consumption of higher than 10mW.SUMMARY
[0004] In general, embodiments of the present disclosure provide a solution on ambient internet of thing (IoT) .
[0005] In a first aspect, there is provided a first device. The first device comprises: a processor, configured to cause the first device to: receive, from a second device, a first indication indicating a first type of start of a slot; and receive, from the second device, a second indication indicating a slot count value in a second type of start of the slot.
[0006] In a second aspect, there is provided a first device. The first device comprises: a processor, configured to cause the first device to: detect a preamble from a second device; and determine that a configuration of a paging round is to be changed based on one of: the detected preamble, or an absence of the preamble.
[0007] In a third aspect, there is provided a first device. The first device comprises: a processor, configured to cause the first device to: receive, from a second device, a paging re-indication message; determine whether to apply the paging re-indication message based on a reception of a paging indication message; and apply a paging procedure based on the paging re-indication message or the paging indication message.
[0008] In a fourth aspect, there is provided a first device. The first device comprises: a processor, configured to cause the first device to: receive, from a second device, scheduling information on a physical reader device channel (PRDCH) ; and perform, to the second device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state.
[0009] In a fifth aspect, there is provided a second device. The second device comprises: a processor, configured to cause the second device to: transmit, to a first device, a first indication indicating a first type of start of a slot; and transmit, to the first device, a second indication indicating a slot count value in a second type of start of the slot.
[0010] In a sixth aspect, there is provided a second device. The second device comprises: a processor, configured to cause the second device to: transmit a preamble to a first device, wherein the preamble is a dedicated preamble for a modification of the configuration.
[0011] In a seventh aspect, there is provided a second device. The second device comprises: a processor, configured to cause the first device to: transmit, to a first device, a paging re-indication message, wherein the paging re-indication message comprises information on a current slot count value or a number of slots.
[0012] In a eighth aspect, there is provided a second device. The second device comprises: a processor, configured to cause the second device to: transmit, to a first device, scheduling information on a physical reader device channel (PRDCH) ; and receive, from the first device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state.
[0013] In a ninth aspect, there is provided a communication method performed by a first device. The method comprises: receiving, from a second device, a first indication indicating a first type of start of a slot; and receiving, from the second device, a second indication indicating a slot count value in a second type of start of the slot.
[0014] In a tenth aspect, there is provided a communication method performed by a first device. The method comprises: detecting a preamble from a second device; and determining that a configuration of a paging round is to be changed based on one of: thedetected preamble, or an absence of the preamble.
[0015] In an eleventh aspect, there is provided a communication method performed by a first device. The method comprises: receiving, from a second device, a paging re-indication message; determining whether to apply the paging re-indication message based on a reception of a paging indication message; and applying a paging procedure based on the paging re-indication message or the paging indication message.
[0016] In a twelfth aspect, there is provided a communication method performed by a first device. The method comprises: receiving, from a second device, scheduling information on a physical reader device channel (PRDCH) ; and performing, to the second device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state.
[0017] In a thirteenth aspect, there is provided a communication method performed by a second device. The method comprises: transmitting, to a first device, a first indication indicating a first type of start of a slot; and transmitting, to the first device, a second indication indicating a slot count value in a second type of start of the slot.
[0018] In a fourteenth aspect, there is provided a communication method performed by a second device. The method comprises: transmitting a preamble to a first device, wherein the preamble is a dedicated preamble for a modification of the configuration.
[0019] In a fifteenth aspect, there is provided a communication method performed by a second device. The method comprises: transmitting, to a first device, a paging re-indication message, wherein the paging re-indication message comprises information on a current slot count value or a number of slots.
[0020] In a sixteenth aspect, there is provided a communication method performed by a second device. The method comprises: transmitting, to a first device, scheduling information on a physical reader device channel (PRDCH) ; and receiving, from the first device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state.
[0021] In a seventeenth aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, or sixteenth aspect.
[0022] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Through the more detailed description of some example embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
[0024] FIG. 1A and FIG. 1B illustrate example communication environments in which example embodiments of the present disclosure can be implemented, respectively;
[0025] FIG. 2 illustrates a signaling flow related to count indication in accordance with some embodiments of the present disclosure;
[0026] FIG. 3 illustrates a schematic diagram of count indication in each slot in accordance with some embodiments of the present disclosure;
[0027] FIG. 4 illustrates a signaling flow related to modification indication in accordance with some embodiments of the present disclosure;
[0028] FIG. 5 illustrates a schematic diagram of modification indication in a round in accordance with some embodiments of the present disclosure;
[0029] FIG. 6 illustrates a signaling flow related to paging re-indication in accordance with some embodiments of the present disclosure;
[0030] FIG. 7 illustrates a signaling flow related to energy state indication in accordance with some embodiments of the present disclosure;
[0031] FIG. 8 illustrates a flowchart of a communication method implemented at a first device according to some example embodiments of the present disclosure;
[0032] FIG. 9 illustrates a flowchart of a communication method implemented at a first device according to some example embodiments of the present disclosure;
[0033] FIG. 10 illustrates a flowchart of a communication method implemented at a first device according to some example embodiments of the present disclosure;
[0034] FIG. 11 illustrates a flowchart of a communication method implemented at a first device according to some example embodiments of the present disclosure;
[0035] FIG. 12 illustrates a flowchart of a communication method implemented at a second device according to some example embodiments of the present disclosure;
[0036] FIG. 13 illustrates a flowchart of a communication method implemented at a second device according to some example embodiments of the present disclosure;
[0037] FIG. 14 illustrates a flowchart of a communication method implemented at a second device according to some example embodiments of the present disclosure;
[0038] FIG. 15 illustrates a flowchart of a communication method implemented at a second device according to some example embodiments of the present disclosure; and
[0039] FIG. 16 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
[0040] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0041] Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
[0042] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0043] As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further has ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
[0044] The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
[0045] The terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
[0046] The terminal or the network device may work on several frequency ranges, e.g., FR1 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
[0047] The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator. In some embodiments, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In some embodiments, the first network device may be a first RAT device and the second network device may be a second RAT device. In some embodiments, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In some embodiments, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In some embodiments, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0048] As used herein, the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
[0049] In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0050] As used herein, the term “resource, ” “transmission resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
[0051] As used herein, the term “IoT radio interface” may refer to an air interface that is used for IoT communication. The term “backscatter” used herein may refer to a method that uses an incident radio-frequency (RF) signal to transmit data without a battery or power source. The term “backscatter signal” used herein may refer to a reflection of ambient radio frequency signal.
[0052] The term “ambient IoT device” used herein is a 3GPP IoT device which is much smaller and cheaper compared to previous generations of IoT. The ultimate ambient IoT energy source is that from radio waves. Both Ambient IoT and Ambient computing rely upon energy harvesting as one of the key mechanisms for powering and enabling the technology. Energy harvesting, as it applies to Ambient IoT and Ambient Computing, is the harnessing of the power in ambient radio waves to power tiny computers. Ambient IoT device may have a new radio / air interface to a reader / node. The new radio interface may be frame based or non-frame based. Deploying ambient IoT service on existing system could reduce the operation cost and quickly commercialize the new service. The term “chip” used herein may refer to a transmission after modulation with a voltage higher than the voltage threshold or with a voltage lower than the voltage threshold. The term “chip duration” or “duration of chip” used herein may refer to how long the chip lasts.
[0053] Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
[0054] FIG. 1A and FIG. 1B illustrate schematic diagrams of example communication environments in which example embodiments of the present disclosure can be implemented, respectively. As shown in FIG. 1A and FIG. 1B, a plurality of communication devices, including a device 110 and a device 120, can communicate with each other. In the example of FIG. 1A and FIG. 1B, the device 110 may be an ambient IoT device / ambient IoT tag and the device 120 may be a base station serving a device 130 which is a UE.
[0055] It is to be understood that the number of devices and their connections shown in FIG. 1A and FIG. 1B are only for the purpose of illustration without suggesting any limitation. The communication environment may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell, and one or more additional cells may be deployed in the communication environment. It is noted that although illustrated as a network device, the device 120 may be another device than a network device. Although illustrated as a terminal device, the device 130 may be another device than a terminal device.
[0056] In the following, for the purpose of illustration, some example embodiments are described with the device 130 operating as a UE and the device 120 operating as a base station. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
[0057] In some example embodiments, if the device 130 is a terminal device and the device 120 is a network device, a link from the device 120 to the device 130 is referred to as a downlink (DL) , while a link from the device 130 to the device 120 is referred to as an uplink (UL) . In DL, the device 120 is a transmitting (TX) device (or a transmitter) and the device 130 is a receiving (RX) device (or a receiver) . In UL, the device 130 is a TX device (or a transmitter) and the device 120 is a RX device (or a receiver) .
[0058] The communications in the communication environments shown in FIG. 1A and FIG. 1B may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
[0059] FIG. 1A shows a first topology 100 where the device 110 (i.e., ambient IoT device) directly and bidirectionally communicates with the device 120. The communication between the device 120 and the device 110 may include ambient IoT data and / or signalling. This first topology 100 may include the possibility that the device 120 transmitting to the device 110 is a different from the device 120 receiving from the device 110. For example, the first topology 100 may be deployed in a scenario where the device 110 (i.e., ambient IoT device) and the device 120 may be indoors.
[0060] FIG. 1B shows a second topology 100’ where the device 110 (i.e., ambient IoT device) communicates bidirectionally with an intermediate node (i.e., the device 130) between the device 110 and the device 120. In the second topology 100’ , the intermediate node may be a relay, IAB node, UE, repeater, and the like. which is capable of Ambient IoT. The intermediate node may transfer Ambient IoT data and / or signalling between the device 110 and the device 120. For example, the second topology 100’ may be deployed in a scenario where the device 110 (i.e., ambient IoT device) and the device 120 may be outdoor.
[0061] In some embodiments, an air interface design with minimized differences (where necessary) for ambient IoT may enable the following devices: (1) Device 1 ~1 μW peak power consumption, has energy storage, initial sampling frequency offset (SFO) up to 10X ppm, neither DL nor UL amplification in the device, the device's UL transmission is backscattered on a carrier wave provided externally; and (2) Device 2a and Device 2b ≤ a few hundred μW peak power consumptionl, has energy storage, initial sampling frequency offset (SFO) up to l0X ppm, both DL and / or UL amplification in the device. The UL transmission of Device 2a may be backscattered on a carrier wave provided externally. The UL transmission of Device 2b may be generated internally by the device. It is to be understood that “≤ a few hundred μW” means WGs are not tasked with setting a particular value, and that it will be for WG discussions to determine ifa presented design with corresponding power consumption satisfies the “≤ a few hundred μW” requirement.
[0062] In some embodiments, there may be different types of ambient IoT devices, including: a first type of device (i.e., Device A) which has no energy storage and no independent signal generation / amplification, i.e. backscattering transmission, a second type of device (i.e., Device B) which has energy storage but no independent signal generation, i.e. backscattering transmission, and a third type of device (i.e., Device C) which has energy storage and independent signal generation, i.e., active RF components for transmission. For the second type of device, use of stored energy can include amplification for reflected signals. The device 110 may be any of the first, second or third types of devices.
[0063] A limited energy storage can be different among implementations within Device B or implementations within Device C, and different between Device B and Device C. Such storage is expected to be order (s) of magnitude smaller than an NB-IoT device would typically include. For Device A, the power consumption target during transmitting / receiving is ≤ 1 μW or ≤ 10 μW. For Device B, the target during transmitting / receiving is such that: Device A power consumption << Device B power consumption < Device C power consumption; or Device A power consumption ≤ Device B power consumption < Device C power consumption. The device power consumption during transmitting / receiving for Device C is ≤ 1 mW to ≤ 10 mW. For Device A, the complexity target is to be comparable to UHF RFID ISO18000-6C (EPC C1G2) . For Device B, the target is such that: Device A complexity < Device B complexity < Device C complexity. For Device C, the complexity target is to be orders-of-magnitude lower than NB-IoT.
[0064] In some embodiments, the ambient device is assumed to have two states: ON, OFF. In some other embodiments, the ambient device is assumed to have three states: ON, OFF, SLEEP.
[0065] In some embodiments, it can identity function (s) of the device that can be assumed supported and assumed not supported in each of the above device states, subject to:ON state supports at least: transmission, reception for communication; OFF state does not support at least: transmission, reception for communication, running a clock; OFF state supports at least: energy harvesting; SLEEP state supports at least: maintaining a memory content from ON state, running a clock or maintaining a timer, energy harvesting; and SLEEP state does not support at least: transmission, reception for communication.
[0066] Reference is made to FIG. 2, which illustrates a signaling flow 200 of a transmission between a reader and a device in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 200 involves the first device 210 and the second device 220. The first device 210 may be an ambient IoT device and the second device 220 may be a reader.
[0067] In some embodiments, slotted ALOHA may be used for ambient IoT device random access. The reader may indicate the number of slots to all the devices and a device may randomly select a slot for its access attempt. For ambient IoT slotted ALOHA, the duration of a slot may not be fixed. For example, when there is no response received by the reader on a slot, the reader may early stop the slot and start the next slot. When there is one device identified in the slot and a lot of data bits needs to be exchanged, the reader may spend more time on the current slot. In this sense, the beginning of each slot may be indicated by the reader. Usually, reader only needs to indicate a first type of start of a slot and the ambient IoT device may decrease the slot count value by one where the slot count value maintained by the device. When the slot count value equals to zero, the device may transmit msgl in this slot. According to embodiments described with reference to FIG. 2, instead of only transmitting the first type of start of the slot, a second type of start of the slot may also be transmitted. In this way, it can save the power consumption and benefit for energy harvesting.
[0068] The second device 220 transmits (2010 ) a first indication indicating a first type of start of a slot to the first device 210. That is, the first device 210 receives (2010) the first indication indicating the first type of start of the slot from the second device 210.
[0069] The second device 220 transmits (2010) a second indication indicating a slot count value in a second type of start of the slot to the first device 210. That is, the first device 210 receives (2010) the second indication indicating the slot count value in the second type of start of the slot from the second device 220.
[0070] In some embodiments, the number of bits for the slot count value is determined based on the number of slots. For example, if the number of slots is 6, the number of the bits may be 3. As another example, if the number of slots is 4, the number of the bits may be 2.
[0071] In some embodiments, the indicated slot count value is in a decreasing order. The count value may be decreased by one for a new slot. For example, as shown in FIG. 3, the count value may be further decreased by one for the slot 320-2, when comparing with the count value for the slot 320-1. Similarly, the count values may be further decreased for the slots 320-3 and 320-4.
[0072] In some embodiments, the indicated count value is regarded as a remaining number of slots of a paging round. For example, if the remaining number of slots in the paging round is 3, the indicated count value may be 3.
[0073] In some embodiments, the second device 220 may transmit, to the first device 210, a second type of slot starting indicator after a transmission of N first type of slot starting indicators, where N is an integer. That is, the first device 210 may receive, from the second device 220, the second type of the slot starting indicator after a transmission of N first type of slot starting indicators. For example, the reader (i.e., the second device 220) transmit every N first type of slot starting indicator followed one second type of slot starting indicator.
[0074] In some embodiments, the first device 210 may wake up to monitor the slot count value, after being in a sleep mode for a time duration. The first device 210 may determine to enter the sleep mode again based on the slot count value. For example, as shown in FIG. 3, if the first device 210 selects the count #1, the first device 210 may enter the sleep mode for a while and then enter the on mode (i.e., wake up) before the slot 320-2 on which the count #1 is transmitted.
[0075] In some embodiments, if the first device 210 does not finish accessing in a paging round, the first device 210 may monitor the slot count value. The first device 210 may maintain in the sleep mode for the time duration before the slot. For example, for the first device 210 not finishing access in a round, the first device 210 may monitor the slot count value and sleep for a while before the selected slot. In some other embodiments, if the first device 210 has finished accessing in a paging round, the first device 210 may monitor the slot count value. The first device 210 may maintain in the sleep mode for the time duration before an end of the paging round. For example, for the first device 210 having finished access in a round, the first device 210 may monitor the slot count value and sleep for a while before the end of current round. In some other embodiments, as shown in FIG. 3, based on the remaining count value, the first device 210 may further enter the sleep mode. Since the slot duration is undermined, the first device 210 may be conservative on the sleep time to not miss the selected slot.
[0076] Reference is made to FIG. 4, which illustrates a signaling flow 400 of a transmission between a reader and a device in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 400 involves the first device 410 and the second device 420. The first device 410 may be an ambient IoT device and the second device 420 may be a reader.
[0077] In some embodiments, in a paging round / access round, the reader may adjust its configuration and / or command a new round / paging. For example, the reader may change the paging list of devices, the number of slots, chip duration control information and so on. In some embodiments, for a device entering the sleep mode, it may have ability to detect preamble for counting and calibrate the time but cannot detect PRDCH. The device entering the sleep mode may not be aware of the modification on the current round that it may wrongly transmit request when it wakeups to on mode. According to embodiments described with reference to FIG. 4, a special preamble used to indicate the modification / new of the paging round / access round is introduced, thereby avoiding the wrong transmission of the request.
[0078] The second device 420 transmits (4010) a preamble to the first device 410. The first device 410 detects the preamble. For example, the second device 420 may transmit preambles on slots 520-1, 520-2 and 520-3.
[0079] The first device 410 determine (4020) that a configuration of a paging round is to be changed based on one of: the detected preamble, or an absence of the preamble. For example, the first device 410 may determine whether the preamble is a dedicated preamble for a modification of the configuration. In this case, if the preamble is the dedicated preamble, the first device 410 may determine that the configuration of the paging round is changed. The first device may then wake up to monitor a physical reader to device channel (PRDCH) . The modification / dedicated preamble may be transmitted before the PRDCH containing the new configuration / indication to modify the current paging round / access round.
[0080] In some embodiments, when the first device 410 in the sleep mode detects the special preamble, the first device 410 may assume the configuration of the current paging round / access round will be changed, and wakeup to on mode to monitor the PRDCH. For example, as shown in FIG. 5, if the preamble received on slot 520-3 is the dedicated preamble / modification preamble, the first device 410 may monitor the PRDCH including the new paging on the slot 530.
[0081] In some embodiments, if the preamble is not detected for a number of times, the first device 410 may determine that the configuration of the paging round is changed and may wake up to monitor a PRDCH. For example, the first device 410 doesn't transmit the preamble for a number of times, before the PRDCH (520-3) containing the new configuration / indication to modify the current paging round / access round. In some embodiments, when the first device 410 in the sleep mode doesn't detect the preamble for a number of times, the first device 410 may assume the configuration of the current paging round / access round will be changed, and it wakeup to on mode to monitor the PRDCH.
[0082] Reference is made to FIG. 6, which illustrates a signaling flow 600 of a transmission between a reader and a device in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 600 involves the first device 610 and the second device 620. The first device 610 may be an ambient IoT device and the second device 620 may be a reader.
[0083] In some embodiments, the ambient IoT device may be under its off state and may not receive the PRDCH for paging. When there are large number of slots for this paging / access round, the ambient IoT device has to wait a long time for the next round. According to embodiments of the present disclosure described with reference to FIG. 6, paging / access re-indication message / command is introduced, thereby avoiding waiting long time for the next paging round.
[0084] The second device 620 transmits (6010) a paging re-indication message to the first device 610. That is, the first device 610 receives (6010) the paging re-indication message from the second device 620. In some embodiments, the paging re-indication message may have the same information as the paging message.
[0085] The first device 610 determines (6020) whether to apply the paging re-indication message based on a reception of a paging indication message. The first device 610 applies (6030) a paging procedure based on the paging re-indication message or the paging indication message.
[0086] In some embodiments, if the paging indication message is received during an on state of the first device, the first device 610 may apply (6030) the paging procedure based on the paging indication message. For example, if the first device 610 received the paging message / command before during its on state, the first device 610 may ignore the paging re-indication message.
[0087] In some embodiments, the first device 610 may transition from an offstate to an on state. In this ease, the first device 610 may determine that the paging indication message is not received and paging re-indication message is received during the on state of the first device 610. The first device 610 may then apply (6030) the paging procedure based on the paging re-indication message.
[0088] In some embodiments, the paging re-indication message may include information on a current slot count value. In some embodiments, the first device 610 may select a slot among a number of slots. If the selected slot index is less than the current slot count value, the first device 610 may skip a transmission of a paging response in the current paging. The number of slots is the number of slots in a current paging. For example, if the selected slot index is less than the current slot count value, i.e., the select slot has been past, the first device 610 may not transmit in this paging round.
[0089] In some embodiments, if the first device 610 has not finished a paging response in a current paging round, the first device 610 may apply (6030) the paging procedure based on the paging re-indication message. In some embodiments, the paging re-indication message indicates a number of slots.
[0090] The first device 610 may select a slot among the indicated number of slots for paging response. For example, if the first device 610 has not finished the paging response / access in the paging / access round, the first device 610 may randomly select a slot among newly indicated number of slots for paging response / access.
[0091] Reference is made to FIG. 7, which illustrates a signaling flow 700 of a transmission between a reader and a device in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 700 involves the first device 710 and the second device 720. The first device 710 may be an ambient IoT device and the second device 720 may be a reader. According to the embodiments described with reference to FIG. 7, reader may restrict the device's response or device may notify reader the situation, thereby avoiding mismatching between reader and device.
[0092] The second device 720 transmits (7010) , to the first device 710, scheduling information on a physical reader device channel (PRDCH) . That is, the first device 710 receives (7010) the scheduling information from the second device 720. In some embodiments, the scheduling information may include a first indication regarding whether the scheduling information is a first scheduling information of a current on state. For example, a bit field is included in the scheduling information to indicate whether it is the first scheduling information or not.
[0093] The first device 710 performs (7020) , to the second device 720, a transmission on a physical device reader channel (PDRCH) . In some embodiments, the transmission may include a second indication indicating whether the transmission is a first transmission of the current on state. For example, a bit field may be included in the transmission on PDRCH to indicate whether it is the first transmission or not.
[0094] In some embodiments, the first device 710 may determine whether the scheduling information is the first scheduling information based on the first indication. In this case, if the scheduling information is not the first scheduling information and there is no communication between the first and second devices before the current on state of the first device, the first device 710 may skip a response to the scheduling information. For example, if the value of the bit field is set to a predetermined number (such as, 1) and the first device 710 has not communicated (transmitted and / or received) with the second device 720 before during its on state, the first device 710 may not respond the scheduling. Alternatively, if the value of the bit field is set to another predetermined number (such as, 0) , the first device 710 may transmit response the scheduling information. In some embodiments, the scheduling information comprises a message 1 request scheduling.
[0095] In some embodiments, if the transmission is the first transmission of the current on state, the first device 710 may set the second indication to a first predetermined value. For example, the value of the bit field in the transmission may be set to 1. Alternatively, if the transmission is not the first transmission of the current on state, the first device 710 may set the second indication to a second predetermined value. For example, the value of the bit field in the transmission may be set to 0.
[0096] In some embodiments, the transmission further comprises a flag bit for determining whether a PRDCH transmission is missed by the second device. For example, for device inventory, there could be a flag store on the device. When the stored flag is the same as / different from the indicated flag, the first device 710 may response this round of inventory. The first device 710 may miss the PRDCH message / command which changes the flag. The first device 710 can include its flag bit (s) in PDRCH transmission that the second device 720 can detect whether some PRDCH is missed by the first device 710 during its off / sleep state.
[0097] FIG. 8 illustrates a flowchart of a communication method 800 implemented at a first device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the device 110 in FIG. 1A and FIG. 1B.
[0098] At block 810, the first device receives, from a second device, a first indication indicating a first type of start of a slot.
[0099] At block 820, the first device receives, from the second device, a second indication indicating a slot count value in a second type of start of the slot.
[0100] In some example embodiments, the number of bits for the slot count value is determined based on the number of slots.
[0101] In some example embodiments, the indicated slot count value is in a decreasing order.
[0102] In some example embodiments, the indicated count value is regarded as a remaining number of slots of a paging round.
[0103] In some example embodiments, the method 800 further includes: receiving, from the second device, a second type of slot starting indicator after a transmission of N first type of slot starting indicators, wherein N is an integer.
[0104] In some example embodiments, the method 800 further includes: waking up to monitor the slot count value, after being in a sleep mode for a time duration.
[0105] In some example embodiments, the method 800 further includes: determining to enter the sleep mode again based on the slot count value.
[0106] In some example embodiments, the method 800 further includes: in response to that the first device does not finish accessing in a paging round, monitoring the slot count value; and maintaining in the sleep mode for the time duration before the slot.
[0107] In some example embodiments, the method 800 further includes: in response to that the first device has finished accessing in a paging round, monitoring the slot count value; and maintaining in the sleep mode for the time duration before an end of the paging round.
[0108] FIG. 9 illustrates a flowchart of a communication method 900 implemented at a first device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 900 will be described from the perspective of the device 110 in FIG. 1A and FIG. 1B.
[0109] At block 910, the first device detects a preamble from a second device.
[0110] At block 920, the first device determines that a configuration of a paging round is to be changed based on one of: the detected preamble, or an absence of the preamble.
[0111] In some example embodiments, the method 900 further includes: determining whether the preamble is a dedicated preamble for a modification of the configuration; in response to that the preamble is the dedicated preamble, determining that the configuration of the paging round is changed; and waking up to monitor a physical reader to device channel (PRDCH) .
[0112] In some example embodiments, the method 900 further includes: in response to that the preamble is not detected for a number of times, determining that the configuration of the paging round is changed; and wake up to monitor a PRDCH.
[0113] FIG. 10 illustrates a flowchart of a communication method 1000 implemented at a first device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1000 will be described from the perspective of the device 110 in FIG. 1A and FIG. 1B.
[0114] At block 1010, the first device receives, from a second device, a paging re-indication message.
[0115] At block 1020, the first device determines whether to apply the paging re-indication message based on a reception of a paging indication message.
[0116] At block 1030, the first device applies a paging procedure based on the paging re-indication message or the paging indication message.
[0117] In some example embodiments, the method 1000 further includes: determining that the paging indication message is received during an on state of the first device; and applying the paging procedure based on the paging indication message.
[0118] In some example embodiments, the method 1000 further includes: transitioning from an off state to an on state; determining that the paging indication message is not received during the on state of the first device; and applying the paging procedure based on the paging re-indication message.
[0119] In some example embodiments, the paging re-indication message comprises information on a current slot count value.
[0120] In some example embodiments, the method 1000 further includes: selecting a slot among number of slots, wherein the number of slots is the number of slots in a current paging; and in response to the selected slot index is less than the current slot count value, skipping a transmission of a paging response in the current paging.
[0121] In some example embodiments, the method 1000 further includes: in response to that the first device has not finished a paging response in a current paging round, applying the paging procedure based on the paging re-indication message.
[0122] In some example embodiments, the paging re-indication message indicates a number of slots.
[0123] In some example embodiments, the method 1000 further includes: selecting a slot among the indicated number of slots for paging response.
[0124] FIG. 11 illustrates a flowchart of a communication method 1100 implemented at a first device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1100 will be described from the perspective of the device 110 in FIG. 1A and FIG. 1B.
[0125] At block 1110, the first device receives, from a second device, scheduling information on a physical reader device channel (PRDCH) .
[0126] At block 1120, the first device performs, to the second device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state.
[0127] In some example embodiments, the method 1100 further includes: determining whether the scheduling information is the first scheduling information based on the first indication; and in response to that the scheduling information is not the first scheduling information and there is no communication between the first and second devices before the current on state of the first device, skipping a response to the scheduling information.
[0128] In some example embodiments, the scheduling information comprises a message 1 request scheduling.
[0129] In some example embodiments, the method 1100 further includes: in response to that the transmission is the first transmission of the current on state, setting the second indication to a first predetermined value; and in response to that the transmission is not the first transmission of the current on state, setting the second indication to a second predetermined value.
[0130] In some example embodiments, the transmission further comprises a flag bit for determining whether a PRDCH transmission is missed by the second device.
[0131] FIG. 12 illustrates a flowchart of a communication method 1200 implemented at a second device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1200 will be described from the perspective of the device 120 in FIG. 1A and FIG. 1B.
[0132] At block 1210, the second device transmits, to a first device, a first indication indicating a first type of start of a slot.
[0133] At block 1220, the second device transmits, to the first device, a second indication indicating a slot count value in a second type of start of the slot.
[0134] In some example embodiments, the number of bits for the slot count value is determined based on the number of slots.
[0135] In some example embodiments, the indicated slot count value is in a decreasing order.
[0136] In some example embodiments, the indicated count value is regarded as a remaining number of slots of a paging round.
[0137] In some example embodiments, the method 1200 further includes transmitting, to the first device, a second type of slot starting indicator after a transmission of N first type of slot starting indicators, wherein N is an integer.
[0138] FIG. 13 illustrates a flowchart ofa communication method 1300 implemented at a second device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1300 will be described from the perspective of the device 120 in FIG. 1A and FIG. 1B.
[0139] At block 1310, the second device transmits a preamble to a first device, wherein the preamble is a dedicated preamble for a modification of the configuration.
[0140] FIG. 14 illustrates a flowchart of a communication method 1400 implemented at a second device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1400 will be described from the perspective of the device 120 in FIG. 1A and FIG. 1B.
[0141] At block 1410, the second device transmits, to a first device, a paging re-indication message, wherein the paging re-indication message comprises information on a current slot count value or a number of slots.
[0142] FIG. 15 illustrates a flowchart of a communication method 1500 implemented at a second device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1500 will be described from the perspective of the device 120 in FIG. 1A and FIG. 1B.
[0143] At block 1510, transmit, to a first device, scheduling information on a physical reader device channel (PRDCH) .
[0144] At block 1520, receive, from the first device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state.
[0145] In some example embodiments, the transmission further comprises a flag bit for determining whether a PRDCH transmission is missed by the second device.
[0146] FIG. 16 is a simplified block diagram of a device 1600 that is suitable for implementing embodiments of the present disclosure. The device 1600 can be considered as a further example implementation of any of the devices as shown in FIG. 1 A and FIG. 1B. Accordingly, the device 1600 can be implemented at or as at least a part of the device 110 or the device 120.
[0147] As shown, the device 1600 includes a processor 1610, a memory 1620 coupled to the processor 1610, a suitable transceiver 1640 coupled to the processor 1610, and a communication interface coupled to the transceiver 1640. The memory 1620 stores at least a part of a program 1630. The transceiver 1640 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 1640 may include at least one of a transmitter 1642 and a receiver 1644. The transmitter 1642 and the receiver 1644 may be functional modules or physical entities. The transceiver 1640 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 / Xn interface for bidirectional communications between eNBs / gNBs, S1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and the eNB / gNB, Un interface for communication between the eNB / gNB and a relay node (RN) , or Uu interface for communication between the eNB / gNB and a terminal device.
[0148] The program 1630 is assumed to include program instructions that, when executed by the associated processor 1610, enable the device 1600 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 15. The embodiments herein may be implemented by computer software executable by the processor 1610 of the device 1600, or by hardware, or by a combination of software and hardware. The processor 1610 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1610 and memory 1620 may form processing means 1650 adapted to implement various embodiments of the present disclosure.
[0149] The memory 1620 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1620 is shown in the device 1600, there may be several physically distinct memory modules in the device 1600. The processor 1610 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1600 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0150] According to embodiments of the present disclosure, a first device comprising a circuitry is provided. The circuitry is configured to: receive, from a second device, a first indication indicating a first type of start of a slot; and receive, from the second device, a second indication indicating a slot count value in a second type of start of the slot. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the first device as discussed above.
[0151] According to embodiments of the present disclosure, a first device comprising a circuitry is provided. The circuitry is configured to: detect a preamble from a second device; and determine that a configuration of a paging round is to be changed based on one of: the detected preamble, or an absence of the preamble. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the first device as discussed above.
[0152] According to embodiments of the present disclosure, a first device comprising a circuitry is provided. The circuitry is configured to: receive, from a second device, a paging re-indication message; determine whether to apply the paging re-indication message based on a reception of a paging indication message; and apply a paging procedure based on the paging re-indication message or the paging indication message. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the first device as discussed above.
[0153] According to embodiments of the present disclosure, a first device comprising a circuitry is provided. The circuitry is configured to: receive, from a second device, scheduling information on a physical reader device channel (PRDCH) ; and perform, to the second device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the first device as discussed above.
[0154] According to embodiments of the present disclosure, a second device comprising a circuitry is provided. The circuitry is configured to: transmit, to a first device, a first indication indicating a first type of start of a slot; and transmit, to the first device, a second indication indicating a slot count value in a second type of start of the slot. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the second device as discussed above.
[0155] According to embodiments of the present disclosure, a second device comprising a circuitry is provided. The circuitry is configured to: transmit a preamble to a first device, wherein the preamble is a dedicated preamble for a modification of the configuration. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the second device as discussed above.
[0156] According to embodiments of the present disclosure, a second device comprising a circuitry is provided. The circuitry is configured to: transmit, to a first device, a paging re-indication message, wherein the paging re-indication message comprises information on a current slot count value or a number of slots. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the second device as discussed above.
[0157] According to embodiments of the present disclosure, a second device comprising a circuitry is provided. The circuitry is configured to: transmit, to a first device, scheduling information on a physical reader device channel (PRDCH) ; and receive, from the first device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the second device as discussed above.
[0158] The term “circuitry” used herein may refer to hardware circuits and / or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and / or digital hardware circuits with software / firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and / or firmware.
[0159] According to embodiments of the present disclosure, a first apparatus is provided. The first apparatus comprises means for receiving, from a second device, a first indication indicating a first type of start of a slot; and means for receiving, from the second device, a second indication indicating a slot count value in a second type of start of the slot. In some embodiments, the first apparatus may comprise means for performing the respective operations of the method 800. In some example embodiments, the first apparatus may further comprise means for performing other operations in some example embodiments of the method 800. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0160] According to embodiments of the present disclosure, a first apparatus is provided. The first apparatus comprises means for detecting a preamble from a second device; and means for determining that a configuration of a paging round is to be changed based on one of: the detected preamble, or an absence of the preamble. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 900. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 900. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0161] According to embodiments of the present disclosure, a first apparatus is provided. The first apparatus comprises means for receiving, from a second device, a paging re-indication message; means for determining whether to apply the paging re-indication message based on a reception of a paging indication message; and means for applying a paging procedure based on the paging re-indication message or the paging indication message. In some embodiments, the first apparatus may comprise means for performing the respective operations of the method 1000. In some example embodiments, the first apparatus may further comprise means for performing other operations in some example embodiments of the method 1000. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0162] According to embodiments of the present disclosure, a first apparatus is provided. The first apparatus comprises means for receiving, from a second device, scheduling information on a physical reader device channel (PRDCH) ; and means for performing, to the second device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state. In some embodiments, the first apparatus may comprise means for performing the respective operations of the method 1100. In some example embodiments, the first apparatus may further comprise means for performing other operations in some example embodiments of the method 1100. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0163] According to embodiments of the present disclosure, a second apparatus is provided. The second apparatus comprises means for transmitting, to a first device, a first indication indicating a first type of start of a slot; and means for transmitting, to the first device, a second indication indicating a slot count value in a second type of start of the slot. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 1200. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 1200. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0164] According to embodiments of the present disclosure, a second apparatus is provided. The second apparatus comprises means for transmitting a preamble to a first device, wherein the preamble is a dedicated preamble for a modification of the configuration. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 1300. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 1300. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0165] According to embodiments of the present disclosure, a second apparatus is provided. The second apparatus comprises means for transmitting, to a first device, a paging re-indication message, wherein the paging re-indication message comprises information on a current slot count value or a number of slots. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 1400. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 1400. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0166] According to embodiments of the present disclosure, a second apparatus is provided. The second apparatus comprises means for transmitting, to a first device, scheduling information on a physical reader device channel (PRDCH) ; and means for receiving, from the first device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 1500. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 1500. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0167] In summary, embodiments of the present disclosure provide the following aspects.
[0168] In an aspect, it is proposed a first device, comprising: a processor, configured to cause the first device to: receive, from a second device, a first indication indicating a first type of start of a slot; and receive, from the second device, a second indication indicating a slot count value in a second type of start of the slot.
[0169] In some embodiments, the number of bits for the slot count value is determined based on the number of slots.
[0170] In some embodiments, the indicated slot count value is in a decreasing order.
[0171] In some embodiments, the indicated count value is regarded as a remaining number of slots of a paging round.
[0172] In some embodiments, the first device is caused to: receive, from the second device, a second type of slot starting indicator after a transmission of N first type of slot starting indicators, wherein N is an integer.
[0173] In some embodiments, the first device is caused to: wake up to monitor the slot count value, after being in a sleep mode for a time duration.
[0174] In some embodiments, the first device is caused to: determine to enter the sleep mode again based on the slot count value.
[0175] In some embodiments, the first device is caused to: in response to that the first device does not finish accessing in a paging round, monitoring the slot count value; and maintain in the sleep mode for the time duration before the slot.
[0176] In some embodiments, the first device is caused to: in response to that the first device has finished accessing in a paging round, monitor the slot count value; and maintain in the sleep mode for the time duration before an end of the paging round.
[0177] In an aspect, it is proposed a first device, comprising: a processor, configured to cause the first device to: detect a preamble from a second device; and determine that a configuration of a paging round is to be changed based on one of: the detected preamble, or an absence of the preamble.
[0178] In some embodiments, the first device is caused to: determine whether the preamble is a dedicated preamble for a modification of the configuration; in response to that the preamble is the dedicated preamble, determine that the configuration of the paging round is changed; and wake up to monitor a physical reader to device channel (PRDCH) .
[0179] In some embodiments, the first device is caused to: in response to that the preamble is not detected for a number of times, determine that the configuration of the paging round is changed; and wake up to monitor a PRDCH.
[0180] In an aspect, it is proposed a first device, comprising: a processor, configured to cause the first device to: receive, from a second device, a paging re-indication message; determine whether to apply the paging re-indication message based on a reception of a paging indication message; and apply a paging procedure based on the paging re-indication message or the paging indication message.
[0181] In some embodiments, the first device is caused to: determine that the paging indication message is received during an on state of the first device; and apply the paging procedure based on the paging indication message.
[0182] In some embodiments, the first device is caused to: transition from an off state to an on state; determine that the paging indication message is not received during the on state of the first device; and apply the paging procedure based on the paging re-indication message.
[0183] In some embodiments, the paging re-indication message comprises information on a current slot count value.
[0184] In some embodiments, the first device is caused to: select a slot among number of slots, wherein the number of slots is the number of slots in a current paging; and in response to the selected slot index is less than the current slot count value, skip a transmission of a paging response in the current paging.
[0185] In some embodiments, the first device is caused to: in response to that the first device has not finished a paging response in a current paging round, apply the paging procedure based on the paging re-indication message.
[0186] In some embodiments, the paging re-indication message indicates a number of slots.
[0187] In some embodiments, the first device is caused to: select a slot among the indicated number of slots for paging response.
[0188] In an aspect, it is proposed a first device, comprising: a processor, configured to cause the first device to: receive, from a second device, scheduling information on a physical reader device channel (PRDCH) ; and perform, to the second device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state.
[0189] In some embodiments, the first device is caused to: determine whether the scheduling information is the first scheduling information based on the first indication; and in response to that the scheduling information is not the first scheduling information and there is no communication between the first and second devices before the current on state of the first device, skip a response to the scheduling information.
[0190] In some embodiments, the scheduling information comprises a message 1 request scheduling.
[0191] In some embodiments, the first device is caused to: in response to that the transmission is the first transmission of the current on state, set the second indication to a first predetermined value; and in response to that the transmission is not the first transmission of the current on state, set the second indication to a second predetermined value.
[0192] In some embodiments, the transmission further comprises a flag bit for determining whether a PRDCH transmission is missed by the second device.
[0193] In an aspect, it is proposed a second device, comprising: a processor, configured to cause the second device to: transmit, to a first device, a first indication indicating a first type of start of a slot; and transmit, to the first device, a second indication indicating a slot count value in a second type of start of the slot.
[0194] In some embodiments, the number of bits for the slot count value is determined based on the number of slots.
[0195] In some embodiments, the indicated slot count value is in a decreasing order.
[0196] In some embodiments, the indicated count value is regarded as a remaining number of slots of a paging round.
[0197] In some embodiments, the second device is caused to: transmit, to the first device, a second type of slot starting indicator after a transmission of N first type of slot starting indicators, wherein N is an integer.
[0198] In an aspect, it is proposed a second device, comprising: a processor, configured to cause the second device to: transmit a preamble to a first device, wherein the preamble is a dedicated preamble for a modification of the configuration.
[0199] In an aspect, it is proposed a second device, comprising: a processor, configured to cause the first device to: transmit, to a first device, a paging re-indication message, wherein the paging re-indication message comprises information on a current slot count value or a number of slots.
[0200] In an aspect, it is proposed a second device, comprising: a processor, configured to cause the second device to: transmit, to a first device, scheduling information on a physical reader device channel (PRDCH) ; and receive, from the first device, a transmission on a physical device reader channel (PDRCH) , and wherein the scheduling information comprises a first indication regarding whether the scheduling information is a first scheduling information of a current on state, or the transmission comprises a second indication indicating whether the transmission is a first transmission of the current on state.
[0201] In some embodiments, the transmission further comprises a flag bit for determining whether a PRDCH transmission is missed by the second device.
[0202] In an aspect, a first device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the first device discussed above.
[0203] In an aspect, a second device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the second device discussed above.
[0204] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the first device discussed above.
[0205] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the second device discussed above.
[0206] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the first device discussed above.
[0207] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the second device discussed above.
[0208] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0209] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGS. 1 to 16. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0210] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0211] The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
[0212] Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve des irable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0213] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A first device, comprising:a processor, configured to cause the first device to:receive, from a second device, a first indication indicating a fist type of start of a slot; andreceive, from the second device, a second indication indicating a slot count value in a second type of start of the slot.2.The first device of claim 1, wherein the number of bits for the slot count value is determined based on the number of slots.3.The first device of claim 1, wherein the indicated slot count value is in a decreasing order.4.The first device of claim 1, wherein the indicated count value is regarded as a remaining number of slots of a paging round.5.The first device of claim 1, wherein the first device is caused to:receive, from the second device, a second type of slot starting indicator after a transmission of N first type of slot starting indicators, wherein N is an integer.6.The first device of claim 1, wherein the first device is caused to:wake up to monitor the slot count value, after being in a sleep mode for a time duration.7.The first device of claim 6, wherein the first device is caused to:determine to enter the sleep mode again based on the slot count value.8.The first device of claim 6, wherein the first device is caused to:in response to that the first device does not finish accessing in a paging round, monitoring the slot count value; andmaintain in the sleep mode for the time duration before the slot.9.The first device of claim 6, wherein the first device is caused to:in response to that the first device has finished accessing in a paging round, monitor the slot count value; andmaintain in the sleep mode for the time duration before an end of the paging round.10.A first device, comprising:a processor, configured to cause the first device to:receive, from a second device, a paging re-indication message;determine whether to apply the paging re-indication message based on a reception of a paging indication message; andapply a paging procedure based on the paging re-indication message or the paging indication message.11.The first device of claim 10, wherein the first device is caused to:determine that the paging indication message is received during an on state of the first device; andapply the paging procedure based on the paging indication message.12.The first device of claim 10, wherein the first device is caused to:transition from an off state or sleep state to an on state;determine that the paging indication message is not received during the on state of the first device; andapply the paging procedure based on the paging re-indication message.13.The first device of claim 12, wherein the paging re-indication message comprises information on a current slot count value.14.The first device of claim 13, wherein the first device is caused to:select a slot among number of slots, wherein the number of slots is the number of slots in a current paging; andin response to the selected slot index is less than the current slot count value, skip a transmission of a paging response in the current paging.15.A second device, comprising:a processor, configured to cause the second device to:transmit, to a first device, a first indication indicating a fist type of start of a slot; andtransmit, to the first device, a second indication indicating a slot count value in a second type of start of the slot.16.The second device of claim 15, wherein the number of bits for the slot count value is determined based on the number of slots.17.The second device of claim 15, wherein the indicated slot count value is in a decreasing order.18.The second device of claim 15, wherein the indicated count value is regarded as a remaining number of slots of a paging round.19.The second device of claim 15, wherein the second device is caused to:transmit, to the first device, a second type of slot starting indicator after a transmission of N first type of slot starting indicators, wherein N is an integer.20.A second device, comprising:a processor, configured to cause the first device to:transmit, to a first device, a paging re-indication message, wherein the paging re-indication message comprises information on a current slot count value or a number of slots.
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