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WO2025123717A1 - Ré-accès pour un système d'ido-a - Google Patents

Ré-accès pour un système d'ido-a Download PDF

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Publication number
WO2025123717A1
WO2025123717A1 PCT/CN2024/110481 CN2024110481W WO2025123717A1 WO 2025123717 A1 WO2025123717 A1 WO 2025123717A1 CN 2024110481 W CN2024110481 W CN 2024110481W WO 2025123717 A1 WO2025123717 A1 WO 2025123717A1
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WO
WIPO (PCT)
Prior art keywords
access
resources
domain
resource information
frequency
Prior art date
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Pending
Application number
PCT/CN2024/110481
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English (en)
Inventor
Jing HAN
Jie Hu
Haiming Wang
Luning Liu
Lihua Yang
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Lenovo Beijing Ltd
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Lenovo Beijing Ltd
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Priority to PCT/CN2024/110481 priority Critical patent/WO2025123717A1/fr
Publication of WO2025123717A1 publication Critical patent/WO2025123717A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition

Definitions

  • the present disclosure relates to wireless communications, and more specifically to re-access for an ambient Internet of things (A-IoT) system.
  • A-IoT ambient Internet of things
  • a wireless communications system may include one or multiple network communication devices, such as base stations (BSs) , which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology.
  • BSs base stations
  • eNB eNodeB
  • gNB next-generation NodeB
  • Each network communication device such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology.
  • the wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) .
  • time resources e.g., symbols, slots, subframes, frames, or the like
  • frequency resources e.g., subcarriers, carriers
  • the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .
  • 3G third generation
  • 4G fourth generation
  • 5G fifth generation
  • 6G sixth generation
  • a wireless communication system may include an A-IoT device, which has a lower capability in terms of complexity and power consumption.
  • the wireless communication system may also be referred to as an A-IoT system.
  • Multiple topologies for example, Topologies 1 to 4, are supported for the A-IoT device.
  • Topology 1 the A-IoT device directly and bidirectionally communicates with a BS.
  • Topology 2 the A-IoT device communicates bidirectionally with an intermediate node between the A-IoT device and a BS.
  • Topology 3 the A-IoT device communicates unidirectionally with a BS and communicates uidirectionally with an assisting node.
  • Topology 4 the A-IoT device communicates bidirectionally with a UE.
  • some studies regarding the A-IoT system especially, studies on re-access for the A-IoT system considering the above topologies, are still needed.
  • the present disclosure relates to methods, apparatuses, and systems that support re-access for the A-IoT system. With the apparatuses and methods, it is allowed to improve the flexibility and efficiency of communications in the A-IoT system.
  • a first device comprising at least one memory, and at least one processor coupled with the at least one memory and configured to cause the first device to: based on determining an access failure related to ambient Internet of things (A-IoT) communication to a second device, determine a resource for an access occasion for re-access to the second device, and perform re-access to the second device based on the resource.
  • A-IoT ambient Internet of things
  • a method performed by the first device comprises: based on determining an access failure related to ambient Internet of things (A-IoT) communication to a second device, determining a resource for an access occasion for re-access to the second device, and performing re-access to the second device based on the resource.
  • A-IoT ambient Internet of things
  • a processor for wireless communication comprises at least one controller coupled with at least one memory and configured to cause the processor to: based on determining an access failure related to ambient Internet of things (A-IoT) communication to a second device, determine a resource for an access occasion for re-access to the second device, and perform re-access to the second device based on the resource.
  • A-IoT ambient Internet of things
  • determining the resource for re-access may comprise obtaining resource information indicating one or more resources for re-access, the resource information comprising one or more of the following: frequency-domain resource information indicating one or more frequency-domain resources for re-access, or time-domain resource information indicating one or more time-domain resources for re-access.
  • the one or more frequency-domain resources may comprise at least one frequency available to re-access of one or more frequencies for random access, or a separate frequency for re-access.
  • the time-domain resource information may indicate a parameter corresponding to a frequency-domain resource of the one or more frequency-domain resources, the parameter being used for determining one or more time slots for re-access.
  • determining the resource for re-access may comprise selecting the resource for re-access from the one or more resources indicated in the resource information, and the resource for re-access may be selected randomly, or based on one or more of the following a capability of the first device, a device type of the first device, energy status of the first device, or a priority indication of the one or more resources.
  • obtaining the resource information may comprise obtaining the resource information based on an access trigger message received from the second device.
  • the access trigger message may be an access trigger message for the access occasion, and the one or more resources indicated in the resource information may be associated with the access occasion.
  • obtaining the resource information may comprise obtaining the resource information based on an adjust access trigger message received from the second device.
  • the adjust access trigger message may indicate one or more adjusted resources for initial random access, and some implementations of the method and the first device described herein may further include obtaining an indication indicating that the one or more adjusted resources are available to re-access, from the adjust access trigger message or a paging message.
  • the adjust access trigger message may indicate one or more adjusted resources for initial random access and the one or more resources for re-access.
  • Some implementations of the method and the first device described herein may further include storing target resource information obtained from a target message received from the second device, the target resource information indicating one or more of the following: one or more resources for random access, or the one or more resources for re-access.
  • obtaining the resource information may comprise obtaining the resource information based on the stored target resource information.
  • the target resource information may indicate the one or more resources for random access
  • the target message may further comprise an indication indicating whether the one or more resources for random access are available to re-access
  • determining the resource for re-access may comprise based on determining that the one or more resources for random access are available to re-access, determining the resource for re-access based on the one or more resources for random access.
  • the target message may comprise one of a paging message or an access trigger message.
  • obtaining the resource information may comprise obtaining the resource information based on a message received from the second device after an access trigger message for the access occasion and before an access trigger message for a next access occasion.
  • the resource information may indicate one or more time-domain resources, and determining the resource for re-access comprises selecting a time-domain resource for re-access from the one or more time-domain resources, and determining a frequency-domain resource for re-access as a same frequency-domain resource for random access for the access occasion.
  • obtaining the resource information may comprise obtaining the resource information based on an access trigger message for the access occasion received from the second device, and the time-domain resource information may comprise one or more time-domain offsets of the one or more time-domain resources for re-access relative to a time-domain reference point, and/or the frequency-domain resource information may comprise one or more frequency-domain offsets of one or more frequency-domain resources for re-access relative to a frequency-domain reference point.
  • the time-domain reference point may comprise one of the following: a starting point of message 1 transmission for the access occasion, an ending point of the message 1 transmission, or a time when the first device determines the access failure
  • the frequency-domain reference point may comprise a frequency for random access for the access occasion.
  • the first device may comprise an A-IoT device
  • the second device may comprise one of a relay, an integrated access backhaul (IAB) node, a user equipment (UE) , a repeater, or a base station (BS) .
  • IAB integrated access backhaul
  • UE user equipment
  • BS base station
  • a second device comprising at least one memory, and at least one processor coupled with the at least one memory and configured to cause the second device to: transmit, to a first device, resource information indicating one or more resources, wherein the one or more resources are used by the first device to re-access the second device for an access occasion when an access failure related to ambient Internet of things (A-IoT) communication to the second device occurs, and wherein the resource information comprises one or more of the following: frequency-domain resource information indicating one or more frequency-domain resources for re-access, or time-domain resource information indicating one or more time-domain resources for re-access.
  • A-IoT ambient Internet of things
  • a method performed by the second device comprises: transmitting, to a first device, resource information indicating one or more resources, wherein the one or more resources are used by the first device to re-access the second device for an access occasion when an access failure related to ambient Internet of things (A-IoT) communication to the second device occurs, and wherein the resource information comprises one or more of the following: frequency-domain resource information indicating one or more frequency-domain resources for re-access, or time-domain resource information indicating one or more time-domain resources for re-access
  • A-IoT ambient Internet of things
  • a processor for wireless communication comprises at least one controller coupled with at least one memory and configured to cause the processor to: transmit, to a first device, resource information indicating one or more resources, wherein the one or more resources are used by the first device to re-access the second device for an access occasion when an access failure related to ambient Internet of things (A-IoT) communication to the second device occurs, and wherein the resource information comprises one or more of the following: frequency-domain resource information indicating one or more frequency-domain resources for re-access, or time-domain resource information indicating one or more time-domain resources for re-access.
  • A-IoT ambient Internet of things
  • the one or more frequency-domain resources may comprise at least one frequency available to re-access of one or more frequencies for random access, or a separate frequency for re-access.
  • the time-domain resource information may indicate a parameter corresponding to a frequency-domain resource of the one or more frequency-domain resources, the parameter being used for determining one or more time slots for re-access.
  • the resource information may be transmitted in one of the following: an access trigger message, an adjust access trigger message, a message after an access trigger message for the access occasion and before an access trigger message for a next access occasion,
  • the adjust access trigger message may indicate one or more adjusted resources for initial random access, and the one or more adjusted resources may be indicated to be available to re-access in the adjust access trigger message or a paging message.
  • the adjust access trigger message may indicate one or more adjusted resources for initial random access and the one or more resources for re-access.
  • Some implementations of the method and the second device described herein may further include transmitting, to the first device, a target message comprising target resource information, the target resource information indicating one or more of the following: one or more resources for random access, or the one or more resources for re-access, and wherein the target resource information may be stored at the first device, and the resource information indicating the one or more resources for re-access may be obtained by the first device based on the stored target resource information.
  • the target resource information may indicate the one or more resources for random access
  • the target message may further comprise an indication indicating whether the one or more resources for random access are available to re-access.
  • the target message may comprise one of a paging message or an access trigger message.
  • FIG. 1A illustrates an example of a wireless communications system that supports re-access for the A-IoT system in accordance with aspects of the present disclosure
  • FIG. 1B illustrates an example of Topology 1 associated with aspects of the present disclosure
  • FIG. 1D illustrates an example of Topology 3 associated with aspects of the present disclosure
  • FIG. 1E illustrates an example of Topology 4 associated with aspects of the present disclosure
  • FIG. 1F illustrates another example of a wireless communications system associated with aspects of the present disclosure
  • FIG. 2 illustrates an example process flow in accordance with some example embodiments of the present disclosure
  • FIGS. 3A to 3C illustrate example frequency division multiplexing (FDM) cases in accordance with some example embodiments of the present disclosure
  • FIG. 4 illustrates an example of a device that supports re-access for the A-IoT system in accordance with aspects of the present disclosure
  • FIG. 5 illustrates an example of a processor that supports re-access for the A-IoT system in accordance with aspects of the present disclosure
  • FIGS. 6 through 7 illustrate flowcharts of methods that support re-access for the A-IoT system in accordance with aspects of the present disclosure.
  • references in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
  • first and second or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and/or” includes any and all combinations of one or more of the listed terms.
  • the term “communication network” refers to a network following any suitable communication standards, such as, 5G new radio (NR) , LTE, LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) , and so on.
  • NR 5G new radio
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • NB-IoT Narrow Band Internet of Things
  • the communications between a UE and a network device in the communication network may be performed according to any suitable generation communication protocols, including but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the 4G, 4.5G, the 5G communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • any suitable generation communication protocols including but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the 4G, 4.5G, the 5G communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will also be future type communication technologies and systems in which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned systems.
  • the network device may further refer to a network function (NF) in the core network, for example, a service management function (SMF) , an access and mobility management function (AMF) , a policy control function (PCF) , a user plane function (UPF) or devices with same function in future network architectures, and so forth.
  • NF network function
  • SMF service management function
  • AMF access and mobility management function
  • PCF policy control function
  • UPF user plane function
  • the term “A-IoT device” refers to a device without batteries or with limited energy storage capabilities.
  • energy is provided by harvesting radio waves, light, motion, heat, or any other suitable source.
  • the A-IoT device can also be called a zero-power terminal, a near-zero power terminal, a passive IoT device, an ambient backscatter communication (AmBC) device, a tag, etc.
  • AmBC ambient backscatter communication
  • A-IoT has lower complexity and lower power consumption, and is suitable for more application scenarios.
  • D2R transmission refers to a transmission initiated by an A-IoT device and transmitted to a reader (such as a BS, an intermediate node, an assisting node, or a UE) .
  • R2D transmission refers to a transmission initiated by a reader and transmitted to an A-IoT device.
  • FIG. 1A illustrates an example of a wireless communications system (or referred to as a communication network) 100 that supports re-access for the A-IoT system in accordance with aspects of the present disclosure.
  • the wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment) , one or more UEs 104, a core network 106, and a packet data network 108.
  • the wireless communications system 100 may support various radio access technologies.
  • the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network.
  • LTE-A LTE-Advanced
  • the wireless communications system 100 may be a 5G network, such as an NR network.
  • the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20.
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • IEEE 802.20 The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • CDMA code division multiple access
  • the one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100.
  • One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology.
  • a network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection.
  • a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.
  • a network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112.
  • a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies.
  • a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network.
  • different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102.
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • the above communicate devices involved in Topologies 1 to 4 with reference to FIG. 1B to FIG. 1E may be implemented by devices involved in the wireless communications system 100 as described herein with reference to FIG. 1A.
  • the BS 122, the BS 133, or the BS 142 may be implemented by the base station 102 in FIG. 1A.
  • the BS intermediate node 132 (when implemented by a UE) , the assisting node 143 (when implemented by a UE) , or the UE 152 may be implemented by the UE 104 in FIG. 1A.
  • A-IoT device Continuous study for such kind of wireless IoT device, called A-IoT device, is still expected.
  • RAN2 RAN workgroup 2
  • CBRA contention based random access
  • “4-step” CBRA is also called “3-step” CBRA for the A-IoT system since “Msg4” is not always presence.
  • Msg1 message 1
  • Msg1 message 1
  • decoding problem because of interference or too far distance, etc. Then the re-access by the A-IoT device may need to be performed.
  • RAN workgroup 1 (RAN1) has discussed an FDM scheme for random access.
  • FDM scheme multiple A-IoT devices may communicate with the reader on different frequencies in the same access time slot.
  • Embodiments of the present disclosure provide a solution for re-access for the A-IoT system.
  • a first device determines an access failure related to A-IoT communication to a second device, it determines a resource for an access occasion for re-access to the second device. Moreover, the first device performs re-access to the second device based on the resource.
  • FIG. 2 illustrates an example process flow 200 in accordance with some example embodiments of the present disclosure.
  • the processes 200 will be described with reference to FIG. 1F. It is to be understood that the steps and the order of the steps in FIG. 2 are merely for illustration, and not for limitation. It is to be understood that the process 200 may further include additional blocks not shown and/or omit some shown blocks, and the scope of the present disclosure is not limited in this regard.
  • the first device 161 determines an access failure related to A-IoT communication to the second device 162, it determines (205) a resource (also referred to as re-access resource) for an access occasion for re-access (i.e., a re-access procedure) to the second device 162. For example, during a random access procedure, the first device 161 may determine the access failure happens if no confirmation message is received for Msg1 or a message 3 (Msg3) from the second device 162. Moreover, the first device 161 performs (210) re-access to the second device 162 based on the resource.
  • the terms “re-access” and “re-access procedure” may be used interchangeably in some cases herein.
  • the resource for re-access may comprise a time-domain resource and/or a frequency-domain resource.
  • FDM may be used.
  • three FDM cases may be considered for re-access.
  • the first FDM case of the above three FDM cases in the same access occasion, there may be multiple frequency resources for re-access.
  • the time slots for re-access have the same length.
  • FIG. 3A illustrates an example of the first FDM case in accordance with some example embodiments of the present disclosure. As shown in FIG. 3A, in the frequency-domain, there are 6 frequencies available to re-access, and the time slot lengths for different frequencies are the same.
  • FIG. 3B illustrates an example of the second FDM case in accordance with some example embodiments of the present disclosure. As shown in FIG. 3B, in the frequency-domain, there are 4 frequencies available to re-access, i.e., 40 kHz, 80 kHz, 160 kHz, and 320 kHz, and different frequencies correspond to different time slot lengths.
  • FIG. 3C illustrates an example of the third FDM case in accordance with some example embodiments of the present disclosure.
  • the frequency-domain there are 4 frequencies available to re-access, i.e., 40 kHz, 80 kHz, 160 kHz, and 320 kHz, and different frequencies correspond to different time slot lengths.
  • the frequencies of 40 kHz, 80 kHz, 160 kHz, and 320 kHz there are 8 time slots, 4 time slots, 2 time slots, and 1 time slot available to re-access respectively.
  • an access trigger message for an access occasion may be assumed to be per-frequency (i.e., the access trigger message may be for a specific frequency) , or common (i.e., the access trigger message may be common for all frequencies) .
  • the following determining approaches for the re-access resource may be considered.
  • the first device 161 may obtain resource information (also referred to as a resource indication) indicating one or more resources for re-access (also referred to as one or more re-access resources) .
  • the resource information may comprise frequency-domain resource information indicating one or more frequency-domain resources (for example, one or more frequencies) for re-access.
  • the one or more frequency-domain resources may comprise at least one frequency available to re-access of one or more frequencies for random access (i.e., for initial random access) , and/or a separate frequency for re-access (i.e. a frequency dedicated to re-access) .
  • the resource information may comprise time-domain resource information indicating one or more time-domain resources for re-access.
  • the time-domain resource information may indicate a parameter corresponding to a frequency-domain resource of the one or more frequency-domain resources, and the parameter may be used for determining one or more time slots for re-access.
  • the parameter may comprise a Q parameter, such as a Q parameter dedicated to re-access, also referred to as, Q re-access .
  • the Q parameter may be associated with the re-access frequency. For example, different Q parameter values may be indicated for different re-access frequencies.
  • the target message may further comprise an indication indicating whether the one or more resources for random access are available to re-access (that is, whether an A-IoT device is allowed to re-access in the same round (i.e., the same round in which the access failure occurs) ) .
  • the first device 161 may store the target resource information obtained from the target message when the second device 162 indicates that the one or more resources for random access are available to re-access (i.e., an A-IoT device is allowed to re-access in the same round) .
  • the first device 161 may determine the resource for re-access based on the one or more resources for re-access indicated in the stored target resource information.
  • the above resource information may be contained in a message (for example, a dedicated message) received after an access trigger message for the access occasion (i. e, the current access occasion) and before an access trigger message for the next access occasion from the second device 162.
  • the one or more re-access resources may be indicated by the dedicated message between two access trigger messages (i.e. the access trigger message for the current access occasion and the access trigger message for the next access occasion) . More details regarding the resource information and the re-access resource selection approach as discussed above also apply, and details of these discussions are omitted for brevity.
  • the second device 162 may transmit the dedicate message for re-access before transmitting the access trigger message for the next access occasion, when the second device 162 determines there are enough available resources for re-access. If the first device 161 determines the access failure has occurred in the current access occasion, it may then determine re-access resource in the same access occasion based on the resource information contained in the dedicated message.
  • one or more time-domain resources and/or frequency-domain resources for re-access in the current access occasion may be indicated in the dedicate message for the first device 161 to determine the re-access resource.
  • the first device 161 may select a time-domain resource for re-access from the one or more time-domain resources, and determine a frequency-domain resource for re-access as the same frequency-domain resource for random access for the access occasion. In this case, the first device 161 may perform re-access (for example, transmit a Msg1) on the selected time-domain resource on the same frequency.
  • the first device 161 may determine the indicated time-domain resource and the indicated frequency-domain resource to be used for re-access. In this case, the first device 161 may perform re-access (for example, transmit a Msg1) on the indicated time-domain resource on the associated frequency. In the implementations where the resource information indicates multiple time-domain together with the corresponding frequency-domain resource (s) , the first device 161 may randomly select a time-domain resource and corresponding frequency among all indicated multiple resources. In this case, the first device 161 may perform re-access (for example, transmit a Msg1) in the randomly selected time-domain resource and corresponding frequency among all those indicated resources.
  • the first device 161 may then re-access on other resources of the indicated resources one by one, for example, according to the order of the resource configuration, or the priority indicated for each resource, until re-access succeeds. In this case, the first device 161 may perform re-access (for example, transmit a Msg1) on all indicated resources one by one.
  • the above resource information may be contained in an access trigger message for the access occasion received from the second device 162.
  • the second device 162 transmits the access trigger message to trigger an access occasion for the first device 161 to access
  • re-access resource (s) in the current access occasion may also included. More details regarding the resource information and the re-access resource selection approach as discussed above also apply, and details of these discussions are omitted for brevity.
  • the resource information in the time domain, may comprise one or more time-domain offsets (i.e., one or more delay offsets) of one or more time-domain resources for re-access relative to a time-domain reference point.
  • the time-domain reference point may comprise one of the starting point of the Msg1 transmission (i.e., the Msg1 transmission for the failed random access) for the access occasion, an ending point of the Msg1 transmission, or a time when the first device 161 determines the access failure. Accordingly, when the access failure has occurred, the first device 161 may determine the time-domain resource for re-access based on the one or more time-domain resources determined based on the indicated one or more time-domain offsets.
  • the resource information (also referred to as the frequency-domain resource information) may comprise one or more frequency-domain offsets (also referred to as one or more frequency offsets) of one or more frequency-domain resources for re-access relative to a frequency-domain reference point.
  • the frequency-domain reference point may comprise a frequency for random access for the access occasion.
  • the first device 161 may determine the frequency-domain resource for re-access based on the one or more frequency-domain resources determined based on the indicated one or more frequency-domain offsets.
  • the first device 161 may determine the time-domain resource based on the indicated time-domain offset for re-accessing to the second device 162. In this case, the first device 161 may perform re-access (for example, transmit a Msg1) after the corresponding delay offset with respect to the time-domain reference point.
  • the first device 161 may determine the time-domain resource based on the indicated time-domain offset and the frequency-domain resource based on the indicated frequency-domain offset for re-accessing to the second device 162. In this case, the first device 161 may perform re-access (for example, transmit a Msg1) after the corresponding delay offset with respect to the time-domain reference point on the frequency which has the corresponding frequency offset with respect to the frequency-domain reference point after the determination of access failure.
  • re-access for example, transmit a Msg1
  • the first device 161 may randomly select the resource for re-access from the multiple resources determined based on the one or more time-domain offsets and/or one or more corresponding frequency-domain offsets. In this case, the first device 161 may perform re-access (for example, transmit a Msg1) after the randomly selected delay offset with respect to the time-domain reference point and corresponding frequency which has the corresponding frequency offset with respect to the frequency-domain reference point after the determination of access failure.
  • re-access for example, transmit a Msg1
  • the first device 161 may then re-access on other resources of the indicated resources one by one, for example, according to the order of the resource configuration, or the priority indicated for each resource, until re-access succeeds.
  • the controller 502 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 504 and determine subsequent instruction (s) to be executed to cause the processor 500 to support various operations in accordance with examples as described herein.
  • the controller 502 may be configured to track memory address of instructions associated with the memory 504.
  • the controller 502 may be configured to decode instructions to determine the operation to be performed and the operands involved.
  • the controller 502 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 500 to cause the processor 500 to support various operations in accordance with examples as described herein.
  • the controller 502 may be configured to manage flow of data within the processor 500.
  • the controller 502 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 500.
  • ALUs arithmetic logic units
  • One or more ALUs 506 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 506 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 506 to handle conditional operations, comparisons, and bitwise operations.
  • logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 506 to handle conditional operations, comparisons, and bitwise operations.
  • the processor 500 may support wireless communication in accordance with examples as disclosed herein.
  • the processor 500 may be configured to or operable to support a means for based on determining an access failure related to ambient Internet of things (A-IoT) communication to a second device, determining a resource for an access occasion for re-access to the second device; and a means for performing re-access to the second device based on the resource.
  • A-IoT ambient Internet of things
  • the processor 500 may be configured to or operable to support a means for transmitting, to a first device, resource information indicating one or more resources, wherein the one or more resources are used by the first device to re-access the second device for an access occasion when an access failure related to ambient Internet of things (A-IoT) communication to the second device occurs, and wherein the resource information comprises one or more of the following: frequency-domain resource information indicating one or more frequency-domain resources for re-access; or time-domain resource information indicating one or more time-domain resources for re-access.
  • A-IoT ambient Internet of things
  • FIG. 6 illustrates a flowchart of a method 600 that supports re-access for the A-IoT system in accordance with aspects of the present disclosure.
  • the operations of the method 600 may be implemented by a device or its components as described herein.
  • the operations of the method 600 may be performed by a first device 161 as described herein.
  • the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
  • the method may include based on determining an access failure related to ambient Internet of things (A-IoT) communication to a second device, determining a resource for an access occasion for re-access to the second device.
  • A-IoT ambient Internet of things
  • the operations of 610 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 610 may be performed by a first device 161 as described with reference to FIG. 1F.
  • the method may include performing re-access to the second device based on the resource.
  • the operations of 620 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 620 may be performed by a first device 161 as described with reference to FIG. 1F.
  • FIG. 7 illustrates a flowchart of a method 700 that supports re-access for the A-IoT system in accordance with aspects of the present disclosure.
  • the operations of the method 700 may be implemented by a device or its components as described herein.
  • the operations of the method 700 may be performed by a second device 162 as described herein.
  • the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting, to a first device, resource information indicating one or more resources, wherein the one or more resources are used by the first device to re-access the second device for an access occasion when an access failure related to ambient Internet of things (A-IoT) communication to the second device occurs, and wherein the resource information comprises one or more of the following: frequency-domain resource information indicating one or more frequency-domain resources for re-access; or time-domain resource information indicating one or more time-domain resources for re-access.
  • the operations of 710 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 710 may be performed by a second device 162 as described with reference to FIG. 1F.
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
  • non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements.
  • the terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Divers aspects de la présente divulgation concernent un ré-accès pour un système de l'Internet des objets ambiant (IdO-A). Selon un aspect, si un premier dispositif détermine une défaillance d'accès liée à une communication de l'IdO-A vers un second dispositif, il détermine une ressource pour une occasion d'accès pour un ré-accès au second dispositif. De plus, le premier dispositif effectue un ré-accès au second dispositif sur la base de la ressource. De cette manière, il est possible d'améliorer la flexibilité et l'efficacité de communications dans le système d'IdO-A.
PCT/CN2024/110481 2024-08-07 2024-08-07 Ré-accès pour un système d'ido-a Pending WO2025123717A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013027101A1 (fr) * 2011-07-06 2013-02-28 Alcatel Lucent Procédé et dispositif pour accès aléatoire physique dans un réseau de communication
CN113039825A (zh) * 2018-11-16 2021-06-25 联想（新加坡）私人有限公司 接入被拒绝的网络资源
CN114080048A (zh) * 2021-11-15 2022-02-22 中国移动通信有限公司研究院 一种随机接入资源分配方法及装置、终端、网络设备
CN117676859A (zh) * 2022-08-15 2024-03-08 华为技术有限公司 通信方法、装置及系统
CN117979456A (zh) * 2022-10-19 2024-05-03 华为技术有限公司 一种随机接入方法以及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013027101A1 (fr) * 2011-07-06 2013-02-28 Alcatel Lucent Procédé et dispositif pour accès aléatoire physique dans un réseau de communication
CN113039825A (zh) * 2018-11-16 2021-06-25 联想（新加坡）私人有限公司 接入被拒绝的网络资源
CN114080048A (zh) * 2021-11-15 2022-02-22 中国移动通信有限公司研究院 一种随机接入资源分配方法及装置、终端、网络设备
CN117676859A (zh) * 2022-08-15 2024-03-08 华为技术有限公司 通信方法、装置及系统
CN117979456A (zh) * 2022-10-19 2024-05-03 华为技术有限公司 一种随机接入方法以及装置

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