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WO2025231679A1 - Dispositifs, procédés et système de communication sans fil pour transmettre des informations de système - Google Patents

Dispositifs, procédés et système de communication sans fil pour transmettre des informations de système

Info

Publication number
WO2025231679A1
WO2025231679A1 PCT/CN2024/091826 CN2024091826W WO2025231679A1 WO 2025231679 A1 WO2025231679 A1 WO 2025231679A1 CN 2024091826 W CN2024091826 W CN 2024091826W WO 2025231679 A1 WO2025231679 A1 WO 2025231679A1
Authority
WO
WIPO (PCT)
Prior art keywords
sib
network device
differential
wus
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/091826
Other languages
English (en)
Inventor
Louis MADIER
Jun Li
Feng Han
Heng Liu
Chunhua YOU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2024/091826 priority Critical patent/WO2025231679A1/fr
Publication of WO2025231679A1 publication Critical patent/WO2025231679A1/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
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure generally relates to the field of communications technology.
  • the present disclosure provides devices, methods, and a system for transmitting system information.
  • SIBs System Information Blocks
  • SIBs are broadcast messages from a base station to UEs that contain essential information about the mobile communication system (e.g., 4G, 5G) .
  • MIB Master Information Block
  • SIB Type1 abbreviated as SIB1 or SIB 1
  • SIB 1 is the first RRC message that a UE needs to be able to decode.
  • the base station usually adopts a specific (and often complicated) procedure to schedule and transmit SIB 1, which consumes a substantial portion of resources and energy. For instance, there is a certain periodicity (e.g., 160ms) for transmitting the SIB 1.
  • on-demand SIB 1 is proposed, in particular for UEs in idle or inactive mode.
  • two types of cells may be involved: Anchor Cell (Cell A) and Network Energy Saving (NES) Cell.
  • the NES cell may also refer to an on-demand SIB 1 cell.
  • Cell A is a cell that is periodically transmitting at least its own SIB 1.
  • NES Cell is a cell that can transmit SIB 1 in response to receiving an uplink (UL) wake-up signal (WUS) from a UE. Accordingly, the cell A is configured to provide a WUS configuration to the UE, such that the UE can send the WUS accordingly to trigger the NES Cell or the Cell A to provide the on-demand SIB 1 to the UE.
  • UL uplink
  • WUS wake-up signal
  • the UE is not expected to receive a PDSCH assigned by a PDCCH with CRC scrambled by SI-RNTI with a TBS exceeding 2976 bits. Therefore, the maximum allowed SIB 1 size is 2976 bits.
  • the SIB 1 provides, among other information, the basic needed information for the UE to transmit uplink initial access channels/signals.
  • the initial uplink BWP is configured by an information element (IE) called initialUplinkBWP, which is provided by SIB 1.
  • IE information element
  • the payload size of IE RACH-ConfigCommon provided by initialUplinkBWP is about 83 ⁇ 146 bits.
  • SIB 1 also includes IEs like n-TimingAdvanceOffset, tdd-UL-DL-ConfigurationCommon, ss-PBCH-BlockPower and so on. Some higher layer parameters e.g. cellSelectionInfo is also included in SIB 1.
  • an objective may be to reduce the power consumption for transmitting SIB 1.
  • a further objective may be to reduce transmission overhead for transmitting SIB 1.
  • a first aspect of this disclosure provides a first network device.
  • the first network device is configured to:
  • the first differential SIB 1 comprises:
  • the first network device may correspond to the cell A mentioned above (e.g., being a first base station in the cell A)
  • the second network device may correspond to the NES cell mentioned above (e.g., being a second base station in the NES cell)
  • the first network device may be connectable with the second network device through an interface (e.g., an Xn interface in a mobile communications system) , such that the first network device and the second network device is able to exchange SIB 1.
  • the first network device may be adapted to provide the WUS configuration to the second network device through the interface (e.g., the Xn interface) .
  • the first network device is configured to send the WUS configuration to the terminal device.
  • the indication information comprised in the first differential SIB 1 may be in a form of a list of flags each indicating whether a corresponding IE of the two SIB 1 is the same or not.
  • the differential SIB 1 may simply comprise one or more IEs of the second network device SIB 1 that are different from the first network device SIB 1 and are not defined in the WUS configuration. It may be predefined that for SIB 1 IEs not comprised in the differential SIB 1, the values of the first SIB 1 (i.e., the SIB 1 of the first network device) and/or in the WUS configuration shall be used.
  • the first network device may notify this result to the terminal device using the first differential SIB 1.
  • the first differential SIB 1 may comprise a general flag indicating that the two SIB 1 are entirely the same.
  • any other SIB or any other suitable signalling messages may be used to notify this result.
  • the first differential SIB 1 may function as a legacy SIB 1 of the second network device. In this case, no flag needs to be carried in the first differential SIB 1.
  • the first network device in response to determining that the information on the first SIB 1 network and the information on the second SIB 1 are substantially the same, the first network device is configured not to send the WUS configuration to the terminal device.
  • the terminal device in response to not receiving any WUS configuration from the first network device but being notified by the first network device that the two SIB 1 are the same, the terminal device is configured to communicate with the second network device directly using the SIB 1 of the first network device without sending any wake-up signal.
  • any other SIB (other than the differential SIB 1, e, g, SIB 2, SIB 3 etc. ) may be used by the first network device to notify the UE that the first SIB 1 and the second SIB 2 are the same.
  • a dedicated signalling may be used by the first network device to notify that the first SIB 1 and the second SIB 2 are the same.
  • the first network device in response to determining that the information on the first SIB 1 and the information on the second SIB 1 are not the same, is configured to send the WUS configuration and/or the first differential SIB 1 to the terminal device.
  • the terminal device in response to receiving the WUS configuration from the first network device, before communicating with the second network device, the terminal device is configured to sending a wake-up signal.
  • the WUS configuration comprises necessary information for the terminal device to generate and send the wake-up signal.
  • the WUS configuration may further comprise information about to which network device (the first network device or the second network device) the UE shall request a differential SIB 1.
  • the WUS configuration is indicative that the UE shall request the differential SIB 1 to the first network device.
  • the WUS configuration may comprises one or more SIB 1 IEs, e.g., with which the terminal device can successfully send the wake-up signal.
  • the wake-up signal may be sent by the terminal device to the first network device or to the second network device.
  • the wake-up signal may be used to request SIB 1 information such that that the terminal device can communicate with (e.g., to camp on or access) the second network device.
  • a differential SIB 1 is provided to the terminal device.
  • the wake-up signal is also used by the terminal device to request a differential SIB 1.
  • the first network device may be configured to, in response to receiving the wake-up signal from the terminal device, send the first differential SIB 1 to the terminal device.
  • the first network device may be further configured to forward the wake-up signal to the second network device.
  • the first network device may be configured to send the WUS configuration and/or the first differential SIB 1 to the terminal device in a broadcast manner, or through a paging message, or through group-based DCIs.
  • the WUS configuration and/or the first differential SIB 1 may be sent by the first network device in response to determining that an overhead of the WUS configuration and/or the first differential SIB 1 is higher than a first threshold and/or the comparison result indicates a correlation of the first SIB 1 and the second SIB 1 is less than a second threshold.
  • the group-based DCIs may be Paging Early Indication (PEI) or paging DCI.
  • PEI Paging Early Indication
  • paging DCI Paging DCI
  • the first network device may be configured to send the WUS configuration and/or first differential SIB 1 to the terminal device through a control signaling for cell release.
  • the first network device may be configured to send the WUS configuration and/or first differential SIB 1 to the terminal device through a PDSCH.
  • the first network device may be configured to send the WUS configuration and/or the first differential SIB 1 to the terminal device in response to receiving a request from the terminal device requesting the WUS configuration and/or the first differential SIB 1.
  • the WUS configuration and/or the first differential SIB 1 may be transmitted in an on-demand manner.
  • the request requesting the first differential SIB 1 may be the wake-up signal.
  • a second aspect of this disclosure provides a second network device configured to:
  • the second network device may be connectable with the first network device through an interface (e.g., an Xn interface in a mobile communications system) , such that the first network device and the second network device is able to exchange SIB 1 and WUS configuration.
  • an interface e.g., an Xn interface in a mobile communications system
  • the second network device may be further configured to send the second SIB 1 using a first periodicity.
  • the second network device may be configured to send the second differential SIB 1 using a second periodicity. In case the second SIB 1 and the second differential SIB 1 are both sent, the first periodicity is larger than the second periodicity.
  • the second network device for sending the second differential SIB 1, is configured to:
  • the second network device may be configured to receive a wake-up signal originated from the UE.
  • the wake-up signal may be received by the second network device:
  • the UE sends the wake-up signal to the first network device.
  • a third aspect of this disclosure provides a terminal device configured to:
  • the first network device is adapted to transmit its SIB 1 (the first SIB 1) periodically, such that the terminal device can be aware of the first SIB 1 of the first network device.
  • the differential SIB 1 may comprise information that is in the second SIB 1 of the second network device but not in the first SIB 1 of the first network device and not in the WUS configuration. In this way, the terminal device can determine the second SIB 1 of the second network device based on: the first SIB 1, the WUS configuration, and the differential SIB 1. Based on the determined second SIB 1, the terminal device can communicate with the second network device (e.g., to camp on or to establish an connection with the second network device) .
  • the differential SIB 1 is referred to as the first SIB 1 in this disclosure.
  • the differential SIB 1 is received from the second network device (as in the second aspect)
  • the differential SIB 1 is referred to as the second SIB 1 in this disclosure.
  • the first differential SIB 1 and the second differential SIB 1 may share similar format/content, the notion of “first” and “second” is merely used to distinguishing which network device provides the differential SIB 1.
  • the terminal device when the terminal device receives indication information indicating that the two SIB 1 are the same, then the terminal device is adapted to communicate with (e.g., access or camp on) the second network device based on the first SIB 1 of the first network device directly.
  • the request may be sent through a wake-up signal.
  • the WUS configuration may comprise information to which network device (the first or the second network device) the terminal device shall request the differential SIB 1.
  • the terminal device is adapted to send the request (e.g., the wake-up signal) accordingly based on the WUS configuration.
  • a fourth aspect of this disclosure provides a system comprising a first network device according to the first aspect or any implementation form thereof, a second network device according to the second aspect or any implementation form thereof, and at least one terminal device the third aspect or any implementation form thereof.
  • a fifth aspect of this disclosure provides a method applied to a first network device.
  • the method comprises the following steps:
  • the first differential SIB 1 comprises:
  • the method comprises not sending, by the first network device, the WUS configuration to the terminal device.
  • the method in response to determining that the information on the first SIB 1 and the information on the second SIB 1 are not the same, the method comprises sending, by the first network device, the WUS configuration and/or the first differential SIB 1 to the terminal device.
  • the WUS configuration and/or the first differential SIB 1 may be sent by the first network device to the terminal device in a broadcast manner, or through a paging message, or through group-based DCIs.
  • the WUS configuration and/or the first differential SIB 1 may be sent in response to determining that an overhead of the WUS configuration and/or the first differential SIB 1 is higher than a first threshold and/or the comparison result indicates a correlation of the first SIB 1 and the second SIB 1 is less than a second threshold.
  • the WUS configuration and/or first differential SIB 1 may be sent to the terminal device through a control signaling for cell release.
  • the WUS configuration and/or first differential SIB 1 may be sent to the terminal device through a PDSCH.
  • the WUS configuration and/or first differential SIB 1 may be sent to the terminal device in response to receiving a request from the terminal device requesting the WUS configuration.
  • the method of the fifth aspect may share the same optional features of the first network device of the first aspect.
  • a sixth aspect of this disclosure provides a method applied to a second network device. The method comprises the following steps:
  • the method may further comprise sending the second SIB 1 using a first periodicity, and/or sending the second differential SIB 1 using a second periodicity.
  • the first periodicity is larger than the second periodicity.
  • the step of sending the second differential SIB 1 may comprise:
  • method of the sixth aspect may share the same optional features of the second network device of the second aspect.
  • a seventh aspect of this disclosure provides a method applied to a terminal device. The method comprising:
  • the method of the seventh aspect may share the same optional features of the terminal device of the third aspect.
  • An eighth aspect of this disclosure provides a computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method according to the fifth aspect, the sixth aspect, the seventh aspect, or any implementation form thereof.
  • a ninth aspect of the present disclosure provides a non-transitory storage medium storing executable program code which, when executed by a processor (or a chipset) , causes the method according to the fifth aspect, the sixth aspect, the seventh aspect, or any implementation form thereof to be performed.
  • a tenth aspect of the present disclosure provides a non-transitory storage medium storing executable program code which, when executed by a processor (or a chipset) , causes the method according to the fifth aspect, the sixth aspect, the seventh aspect, or any implementation form thereof to be performed.
  • FIG. 1 shows a signalling diagram of WUS provisioning and on-demand SIB 1 transmission according to this disclosure
  • FIG. 2 shows an exemplary diagram of WUS provisioning and on-demand SIB 1 transmission
  • FIG. 3 shows a further exemplary diagram of WUS provisioning and on-demand SIB 1 transmission
  • FIG. 4 shows a further exemplary diagram of WUS provisioning and on-demand SIB 1 transmission
  • FIG. 5 shows a further exemplary diagram of WUS provisioning and on-demand SIB 1 transmission
  • FIG. 6 shows an exemplary diagram of on-demand SIB 1 transmission
  • FIG. 7 shows an example of a system according to this disclosure.
  • FIG. 1 shows a signalling diagram of WUS provisioning and on-demand SIB 1 transmission according to this disclosure.
  • Anchor Cell Cell A
  • NES Network Energy Saving Cell
  • the cell A is a cell that is periodically transmitting at least its own SIB 1; while the NES Cell is a cell that does not periodically transmitting its own SIB 1.
  • Cell A and NES cell each may comprise a plurality of base stations.
  • cell A may be used to generally refer to any base station comprised therein (also referred to as a first network device) .
  • NES cell may be used to generally refer to any base station comprised therein (also referred to as a second network device) .
  • step 101 on-demand SIB1 feature is activated.
  • Cell A and NES cell are in a so-called “NES mode” .
  • the cell A may be adapted to trigger the on-demand SIB1 feature activation and the NES cell may be adapted to accept or refuse this trigger.
  • the NES cell may be adapted to trigger the on-demand SIB1 feature activation and cell A may be adapted to accept or refuse this triggering.
  • a terminal device e.g., a UE
  • the UE may be camped on the cell A or NES cell.
  • the UE may be triggered to search for a new suitable cell to camp on or not (UE decision after they are informed) .
  • the trigger signaling may be an indication of a subset of PRACH resources configured in the legacy SIB1.
  • This trigger signaling may comprise preferable list of cells to camp on (e.g., a list of cells acting as cell A or NES cell or normal NR cells)
  • the UE may be adapted to stop receiving updated SIB1 (since SIB1 transmission will be on demand) .
  • the UE may consider itself having a valid SIB1 for a predefined duration (e.g., three hours) . After this predefined duration, the UE needs to update its SIB1, which they will not find in the NES cell. Therefore, the UE needs to look for and camp on another cell if the UE wishes to continue receiving paging messages or to establish an RRC connection.
  • the UE may be adapted to start searching for a more suitable cell to camp on, or wait for the predefined duration to see if there is any update coming in between.
  • the on-demand SIB 1 feature has been activated. That is, the first network device (e.g., cell A) , the second network device (e.g., NES cell) , and the terminal device (e.g., the UE) are already in the so-called “NES mode” .
  • step 102 the cell A (or a list of anchor cells) and the NES cell (or a list of NES cells) are adapted to exchange SIB information, in particular information related to SIB 1.
  • this exchange may be performed via Xn interfaces between base stations.
  • Information elements relating to SIB 1 may be shared over the Xn interfaces. It is noted that step 102 may happen before or after step 101, which is not limited in this disclosure.
  • the cell A as the first network device, has its own SIB 1, which is referred to as a first SIB 1.
  • the NES cell as the second network device, also has its own SIB 1, which is referred to as a second SIB 1. Based on the level of information exchange and the level of alignment between the two SIB 1 (i.e., the first SIB 1 and the second SIB 1) , the cell A (or the NES cell) may decide whether to send a WUS configuration to the UE.
  • the two SIB 1 are almost 100% (i.e., the two SIB 1 are substantially the same) .
  • the UE can directly communicate with the NES cell using the first SIB 1 when the UE is paged or the UE needs to initiate a connection (e.g., an RRC connection) .
  • step 103 WUS provisioning is started.
  • step 103 there are various transmission modes for transmitting the WUS configuration. For example:
  • the WUS configuration is transmitted in a broadcast manner (optional if the WUS configuration overhead is lower than a first threshold and/or the SIB 1 similarity/correlation is higher than a second threshold) .
  • the WUS configuration is transmitted through paging or DCI messages.
  • the WUS configuration is transmitted at cell release. This option may be used for a connected-mode UE when it turns into idle/inactive mode.
  • the WUS configuration is transmitted over PDSCH.
  • This option may be used for the connected-mode UE when it turns into idle/inactive mode, or when a link failure is detected, or in response to a UE request requesting the WUS configuration.
  • the WUS configuration is transmitted on demand. This option may be used for the connected-mode UE when the UE becomes aware of the NES mode activation and/or based on measurement results, the UE decides to trigger the on-demand WUS configuration.
  • Option 1 or Option 2 may correspond to step 105 illustrated in FIG. 1 alone (without performing step 104) .
  • Option 3-4 may correspond to step 104 and step 105 illustrated in FIG. 1, in which case, the UE may request the on-demand WUS configuration.
  • the cell A is adapted to provide the WUS configuration. It is noted that in this disclosure, it is mainly considered that the cell A is adapted to provide the WUS configuration. However, it is also possible that the NES cell may also be adapted to provide the WUS configuration.
  • option 3 or option 4 may be used alone to know about existence of the NES cell for the connected-mode UE camped on cell A. This is more energy efficient, e.g., in comparison to option 1 or option 2, especially when the payload size of the WUS configuration is relatively high (e.g., higher than the first threshold) .
  • option 1 or option 2 may be used to send the WUS configuration periodically without any request from UE.
  • Option 1 or option 2 may also be used in combination with the on-demand WUS configuration according to any one or more of option 3, option 4, and option 5. In general, the following combination is allowed: [Option 1 or Option 2] and/or Option 3 and/or Option 4 and/or Option 5.
  • Cell A may be adapted to broadcast the differential SIB 1 instead of broadcasting the WUS configuration, such that the UE does not need to demand the differential SIB 1. This may be used when the overhead of the differential SIB 1 is relatively small (smaller than a third threshold) .
  • Cell A may be adapted broadcast the WUS configuration, which configures the UE to ask for the differential SIB 1 from Cell A. Accordingly, cell A may be adapted to send the first differential SIB1 on demand, i.e., in response to receiving the wake-up signal from the UE.
  • Cell A may be adapted broadcast the WUS configuration, which configures the UE to ask for the differential SIB 1 from NES cell.
  • the first threshold, the second threshold, and the third threshold are configurable thresholds. These thresholds may be configured by a core network (associated with the cell A and the NES cell) or network operators. The UE does not need to be aware of these thresholds.
  • the UE may be adapted to store the WUS configuration while in idle/inactive mode for a certain amount of time. Afterwards, the UE may consider the WUS configuration invalid.
  • the UE is adapted to send a wake-up signal according to the WUS configuration.
  • the wake-up signal may be sent to the cell A or to the NES cell, which may be specified through the WUS configuration.
  • the cell A may be configured to forward the wake-up signal to the NES cell (e.g., to notify the NES cell) .
  • any cell that receives the wake-up signal from the UE may be updated to provide an on-demand SIB 1 to the UE.
  • the cell A is adapted to provide a first differential SIB 1 to the UE in response to receiving the wake-up signal from the UE.
  • the NES cell is adapted to provide a second differential SIB 1 to the UE in response to receiving the wake-up signal from the UE.
  • the cell A forwards the wake-up signal to the NES cell, it may be predefined or agreed among the cell A and the NES cell that either the cell A or the NES cell can be configured to provide the differential SIB 1 to the UE (as long as only one network device provides the differential SIB 1 to the UE in response to one UL wake-up signal) .
  • the first and the second differential SIB 1 are merely used to distinguishing that the differential SIB 1 is provided by different network devices. They shall share the same features introduced below.
  • the on-demand SIB 1 is a differential SIB 1 (the first differential SIB 1 or the second differential SIB 1) .
  • the differential SIB 1 comprises information that is in the second SIB 1 but not in the first SIB 1 and not in the WUS configuration.
  • a complete SIB 1 may comprise, for illustration purposes only, 20 IEs.
  • the first SIB 1 and the second SIB 1 may share 10 same IEs.
  • the cell A send four IEs of the second SIB 1 to the UE through the WUS configuration.
  • the differential SIB 1 may comprise indication information indicating which IE is the same as in the first SIB 1 or the WUS configuration.
  • the differential SIB 1 may comprise:
  • the UE may assume that the rest 14 IEs may reuse the value in the first SIB 1 and/or the WUS configuration. It is noted that the number of IEs in SIB 1 may be predefined or specified in related technical specifications.
  • the NES cell may be configured to send a legacy SIB 1 such that legacy UEs (that does not support NES mode) can also communicate with the NES cell.
  • the transmission of the legacy SIB 1 may be combined with the transmission of the differential SIB 1.
  • the legacy SIB 1 of the NES cell may be transmitted with a long periodicity and the differential SIB 1 may be transmitted with a short periodicity.
  • the legacy SIB 1 of the NES cell and/or the differential SIB 1 may be sent on one or more certain beams.
  • the legacy SIB 1 of the NES cell and the differential SIB 1 may be sent for a certain period of time with a certain periodicity that are different from each other.
  • the differential SIB 1 may be provided to the UE on demand. That is, it is not necessary for a network device to receive an UL WUS to provide a differential SIB 1.
  • the differential SIB 1 may be provided by the network device without any request.
  • the first network device may be adapted to attach the differential SIB 1 to the WUS configuration.
  • the UE may be adapted to determine the SIB 1 of the NES cell based on the following:
  • the UE may be adapted to communicate with the NES cell. For instance, the UE may camp on the NES cell (e.g., to receive paging messages) or access the NES cell (e.g., to establish an RRC connection) .
  • the cell A and the NES cell may decide to deactivate the on-demand SIB 1 and notify this to the UE. Accordingly, the cell A and the NES cell stops monitoring WUS.
  • this disclosure provides a WUS provisioning using:
  • - cell release e.g., for connected mode UEs
  • - dedicated or multicast PDSCH for connected mode UEs (e.g., when the connected UEs become idle/inactive; or in case of a link failure; or UEs perform measurement and decide to request the WUS configuration;
  • the WUS provisioning can be optimized based on the payload size of the WUS configuration (communication overhead) and/or the SIB 1 correlation ration (e.g., common SIB 1 IEs or bits) .
  • FIG. 2 shows an exemplary diagram of WUS provisioning and on-demand SIB 1 transmission.
  • corresponding elements may share the same features.
  • the cell A and the NES cell are adapted to activate the on-demand SIB 1.
  • the cell A is adapted to compare whether its first SIB 1 is the same as a second SIB 1 of the NES cell. In case that the two SIB 1 are the same, then WUS provisioning is not needed, and the cell A may notify this comparison result to the UE through the differential SIB 1 as in step 206. In case that the two SIB are not the same, then WUS provision is need as in step 203.
  • the cell A and the NES cell starts monitoring wake-up signals as in step 204. If any cell receives an UL WUS from the UE in step 205, the cell may be adapted to provide the differential SIB 1 to the UE as in step 206.
  • step 203 WUS provisioning There are various options for step 203 WUS provisioning:
  • Option 203A UE may be adapted to obtain the WUS configuration from Cell A; or
  • Option 203B UE may be adapted to obtain the WUS configuration from NES Cell.
  • step 205 WUS transmission There are various options for step 205 WUS transmission:
  • Option 205A UE may be adapted to transmit UL WUS to Cell A; or
  • Option 205B UE may be adapted to transmit UL WUS to NES Cell.
  • step 206 differential SIB 1 transmission There are various options for step 206 differential SIB 1 transmission:
  • Option 206A UE may be adapted to receive on-demand differential SIB 1 from Cell A; or
  • Option 207B UE may be adapted to receive on-demand differential SIB 1 from NES cell.
  • Cell A is adapted to provide the WUS configuration to the UE.However, it does not exclude the option that the NES Cell may alternatively be configured to provide the WUS configuration to the UE.
  • the options in step 205 and in step 206 are corresponding to each other. That is, if UE transmits UL WUS to cell A as in option 205A, then UE receives on-demand differential SIB 1 from cell A as in option 206A correspondingly.
  • the WUS configuration may comprise information indicating to which network device the UE shall transmit the UL WUS.
  • FIG. 3 shows a further exemplary diagram of WUS provisioning and on-demand SIB 1 transmission.
  • corresponding elements may share the same features.
  • step 301 As depicted in FIG. 3, after the on-demand SIB 1 is activated in step 301 (similar to step 101) , and SIB 1 exchange in step 302 (similar to step 102) . WUS provisioning is started as in step 303 and WUS monitoring is started as in step 304.
  • the cell A is adapted to provide the WUS configuration to the UE as in step 305.
  • the UE transmits UL WUS to the NES cell as in step 306 and receives on-demand differential SIB 1 from the NES cell accordingly as in step 307.
  • the on-demand SIB 1 is deactivated in step 308, and WUS monitoring is stopped in step 309.
  • FIG. 4 shows a further exemplary diagram of WUS provisioning and on-demand SIB 1 transmission.
  • corresponding elements may share the same features.
  • step 401 As depicted in FIG. 4, after the on-demand SIB 1 is activated in step 401 (similar to step 101) , and SIB 1 exchange in step 402 (similar to step 102) . WUS provisioning is started as in step 403 and WUS monitoring is started as in step 404.
  • the cell A is adapted to provide the WUS configuration to the UE as in step 405.
  • the UE transmits UL WUS to the Cell A as in step 406 and receives on-demand differential SIB 1 from the Cell A accordingly in step 407.
  • the on-demand SIB 1 is deactivated in step 408, and WUS monitoring is stopped in step 409.
  • FIG. 5 shows a further exemplary diagram of WUS provisioning and on-demand SIB 1 transmission.
  • corresponding elements may share the same features.
  • step 501 As depicted in FIG. 5, after the on-demand SIB 1 is activated in step 501 (similar to step 101) , and SIB 1 exchange in step 502 (similar to step 102) . WUS provisioning is started as in step 503 and WUS monitoring is started as in step 504.
  • the NES cell is adapted to provide the WUS configuration to the UE as in step 505.
  • the UE transmits UL WUS to the NES cell as in step 506 and receives on-demand differential SIB 1 from the NES cell accordingly in step 507.
  • the on-demand SIB 1 is deactivated in step 508, and WUS monitoring is stopped in step 509.
  • FIG. 6 shows an exemplary diagram of on-demand SIB 1 transmission.
  • the on-demand SIB 1 is activated similar to step 101.
  • the cell A determines that the two SIB 1 of the cell A and the NES cell are the same. Therefore, no WUS provisioning is needed.
  • the cell A may be adapted to notify this comparison result to UE, e.g., using the differential SIB 1, which indicates that the two SIB 1 are entirely the same as in step 603. Accordingly, the UE may direct communicate with the NES cell using the SIB 1 of the cell A as in step 604.
  • the on-demand SIB 1 is deactivated in step 605.
  • FIG. 7 shows an example of a system 700 according to this disclosure.
  • the system 700 comprises at least one first network device 710, at least one second network device 720, and at least one terminal device 730.
  • the first network device 710 may be an anchor cell base station. Generally, in this disclosure, the first network device 710 is adapted to broadcast its SIB 1 periodically.
  • the second network device 720 may be an NES cell base station.
  • the second network device 720 is adapted not to broadcast its SIB 1, or is adapted to broadcast its SIB 1 using a periodicity larger than the SIB 1 transmission periodicity of the first network device, so as to save power.
  • the first network device 710 and the second network device 720 may exchange SIB 1 related information through an interface (e.g., an Xn interface) .
  • the first network device 710 is adapted to provide a WUS configuration 711 to the terminal device 730 upon determining that the SIB 1 of the two network devices are not the same.
  • the terminal device 730 may be adapted to transmit a wake-up signal 712, 722 either to the first network device 710 or to the second network device 720, which is configurable via the WUS configuration.
  • the first network device 710 or the second network device 720 is adapted to provide a differential SIB 1 713, 723 to the terminal device.
  • the differential SIB 1 comprise information that is in the SIB 1 of the second network device but not in the SIB 1 of the first network device and not in the WUS configuration, and/or indication information indicating which information of the two SIB 1 of the two network devices is the same.
  • the terminal device 730 Based on the SIB 1 of the first network device (which is transmitted periodically) , the WUS configuration, and the differential SIB 1, the terminal device 730 is able to determine a complete SIB 1 of the second network device 720, so as to communicate with (e.g., to access or to camp on) the second network device 720.
  • the first network device 710 may correspond to the “Anchor Cell” or “Cell A” introduced in FIGs. 1-6.
  • the second network device 720 may correspond to the “NES Cell” introduced in FIGs. 1-6.
  • the terminal device 730 may correspond to the “UE” introduced in FIGs. 1-6.
  • the present disclosure provides an improved on-demand SIB 1 transmission scheme.
  • the WUS configuration is provided after performing SIB 1 comparison.
  • a differential SIB 1 is proposed to carry only the distinguishing information element (s) , which may further reduce signalling overhead.
  • the present disclosure may be applied to any telecommunications networks/systems, such as but not limited to 5G (or NR) , 6G mobile networks, and the like.
  • the first network device, the second network device, and the terminal device in this disclosure each may comprise processing circuitry or a chipset (not shown) configured to respectively perform, conduct or initiate the various operations described herein.
  • the processing circuitry may comprise hardware and software.
  • the hardware may comprise analog circuitry or digital circuitry, or both analog and digital circuitry.
  • the digital circuitry may comprise components such as application-specific integrated circuits (ASICs) , field-programmable arrays (FPGAs) , digital signal processors (DSPs) , or multi-purpose processors.
  • ASICs application-specific integrated circuits
  • FPGAs field-programmable arrays
  • DSPs digital signal processors
  • the processing circuitry comprises one or more processors and a non-transitory memory connected to the one or more processors.
  • the non-transitory memory may carry executable program code which, when executed by the one or more processors, causes the devices to perform, conduct or initiate the operations or methods described herein.

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

Abstract

La présente divulgation concerne des communications sans fil. Un premier dispositif réseau obtient un second SIB 1 d'un second dispositif réseau et le compare à un premier SIB 1 lui appartenant, afin d'obtenir un résultat de comparaison. Sur la base du résultat de comparaison, le premier réseau détermine s'il faut envoyer une configuration de signal de réveil à un UE. Le premier dispositif réseau est en outre configuré pour déterminer un premier SIB 1 différentiel sur la base du résultat de comparaison et envoyer le premier SIB 1 différentiel à l'UE. Le premier SIB 1 différentiel comprend des informations qui sont dans le second SIB 1 mais pas dans le premier SIB 1 ou la configuration WUS, et/ou des informations d'indication indiquant quel élément (s) d'information des deux SIB 1 est le même. Sur la base du premier SIB 1, de la configuration WUS et du SIB 1 différentiel, l'UE peut communiquer avec le second dispositif réseau.
PCT/CN2024/091826 2024-05-09 2024-05-09 Dispositifs, procédés et système de communication sans fil pour transmettre des informations de système Pending WO2025231679A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220217632A1 (en) * 2019-05-14 2022-07-07 Telefonaktiebolaget Lm Ericsson (Publ) Wus signal design
US20220272568A1 (en) * 2021-02-19 2022-08-25 Qualcomm Incorporated Wake-up signal error handling
WO2023206533A1 (fr) * 2022-04-29 2023-11-02 Oppo广东移动通信有限公司 Procédé et appareil de communication, dispositif, puce, support de stockage, produit et programme
WO2024011567A1 (fr) * 2022-07-15 2024-01-18 Qualcomm Incorporated Améliorations de l'économie d'énergie à l'aide d'un signal de réveil à faible puissance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220217632A1 (en) * 2019-05-14 2022-07-07 Telefonaktiebolaget Lm Ericsson (Publ) Wus signal design
US20220272568A1 (en) * 2021-02-19 2022-08-25 Qualcomm Incorporated Wake-up signal error handling
WO2023206533A1 (fr) * 2022-04-29 2023-11-02 Oppo广东移动通信有限公司 Procédé et appareil de communication, dispositif, puce, support de stockage, produit et programme
WO2024011567A1 (fr) * 2022-07-15 2024-01-18 Qualcomm Incorporated Améliorations de l'économie d'énergie à l'aide d'un signal de réveil à faible puissance

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