WO2023065108A1 - 信息获取方法，信息发送方法、装置和*** - Google Patents

信息获取方法，信息发送方法、装置和*** Download PDF

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Publication number
WO2023065108A1
WO2023065108A1 PCT/CN2021/124651 CN2021124651W WO2023065108A1 WO 2023065108 A1 WO2023065108 A1 WO 2023065108A1 CN 2021124651 W CN2021124651 W CN 2021124651W WO 2023065108 A1 WO2023065108 A1 WO 2023065108A1
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Prior art keywords
terminal device
cell
system information
interface
receiving unit
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PCT/CN2021/124651
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English (en)
French (fr)
Inventor
李国荣
张磊
王昕�
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富士通株式会社
李国荣
张磊
王昕�
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Application filed by 富士通株式会社, 李国荣, 张磊, 王昕� filed Critical 富士通株式会社
Priority to PCT/CN2021/124651 priority Critical patent/WO2023065108A1/zh
Publication of WO2023065108A1 publication Critical patent/WO2023065108A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • This application relates to the field of communication.
  • the terminal device accesses the network part through the Uu interface.
  • system information (SI) and paging message (paging message) are sent by the network (gNB) to the terminal device (UE) .
  • System information includes a Master Information Block (MIB) and a System Information Block (SIB).
  • Figure 1 is a schematic diagram of system information acquisition. As shown in Figure 1, the network device sends MIB and SIB1 to the terminal device. For other system information, the terminal device can send a system information request to the network device side and receive the terminal device from the network device side. The requested system information, or the network device actively sends the system information to the terminal device.
  • MIB Master Information Block
  • SIB System Information Block
  • the paging message mainly includes the paging of the mobile called data initiated by the 5G core network (5GC) and the RAN paging initiated by the radio access network (RAN), paging radio resource control idle (RRC_IDLE) or inactive state (RRC_INACTIVE) in the terminal equipment.
  • FIG. 2 is a schematic diagram of a paging process. As shown in FIG. 2 , a network device sends a paging message to a terminal device.
  • FIG. 3 shows a schematic diagram of the sidelink relay scenario.
  • the remote terminal equipment (remote UE) is not in the base station or cell Within the coverage area, the relay terminal equipment (relay UE) is within the coverage area of the base station or cell.
  • both the remote terminal equipment and the relay terminal equipment are within the coverage area of the base station or cell.
  • the terminal equipment and the relay terminal equipment are within the coverage of different base stations or cells.
  • NR New Radio
  • Uu is used on the Uu link of the relay UE
  • the NR side link is used on the PC5 between the relay UE and the remote UE.
  • the Remote UE can select or reselect a Relay UE and establish a PC5 interface connection with the Relay UE. After the Remote UE establishes a connection with the network through the Relay UE, the serving cell of the Relay UE controls the operation of the Remote UE.
  • the Remote UE judges whether the Relay UE can be selected or reselected, the Remote UE needs to judge whether it can camp on the serving cell of the Relay UE, or obtain the configuration information in the system information of the serving cell of the Relay UE, so that subsequent The Relay UE is connected to the serving cell of the Relay UE, so the Remote UE needs to obtain the system information of the serving cell of the Relay UE; When the system information of the cell changes, the Remote UE also needs to obtain the updated system information of the serving cell of the Relay UE.
  • the Remote UE after the Remote UE has established a PC5 unicast link with the Relay UE, if the core network or gNB wants to page the Remote UE, the Remote UE needs to receive the paging message.
  • embodiments of the present application provide an information acquisition method, an information sending method, device, and system.
  • an information acquisition device configured on a second terminal device, wherein the device includes:
  • a first connection establishing unit which establishes a connection with the first terminal device
  • the receiving unit acquires system information of at least one cell through the first interface and/or the second interface.
  • an information sending device configured on a first terminal device, wherein the device includes:
  • a second connection establishing unit which establishes a connection with the second terminal device
  • a sending unit which forwards or does not forward the system information of the second cell to the second terminal device.
  • a communication system including the second terminal device in the foregoing aspect and/or including the first terminal device in the foregoing aspect.
  • the second terminal device obtains the system information of the corresponding cell through the first interface and/or the second interface, so as to prevent the second terminal device from repeatedly obtaining the system information of the same or different cells to save the second terminal device.
  • the power consumption of the second terminal device; or, the second terminal device can obtain correct system information so as to communicate with the network side more accurately.
  • FIG. 1 is a schematic diagram of a method for obtaining system information
  • Fig. 2 is a schematic diagram of paging message sending
  • Figure 3 is a schematic diagram of Remote UE and Relay UE application scenarios
  • FIG. 4 is a schematic diagram of an information acquisition method in an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an information sending method according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of system information acquisition in an embodiment of the present application.
  • Fig. 7 is a schematic diagram of the same scene of the first cell and the second cell according to the embodiment of the present application.
  • FIGS 8 to 10 are schematic diagrams of system information acquisition in the embodiment of the present application.
  • Fig. 11 is a schematic diagram of different scenarios of the first cell and the second cell according to the embodiment of the present application.
  • FIG. 12 to Figure 19 are schematic diagrams of system information acquisition in the embodiment of the present application.
  • FIG. 20 is a schematic diagram of an information acquisition device according to an embodiment of the present application.
  • FIG. 21 is a schematic diagram of an information sending device according to an embodiment of the present application.
  • FIG. 22 is a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG. 23 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • Fig. 24 is a schematic diagram of a network device according to an embodiment of the present application.
  • the terms “first”, “second”, etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or time order of these elements, and these elements should not be referred to by these terms restricted.
  • the term “and/or” includes any and all combinations of one or more of the associated listed items.
  • the terms “comprising”, “including”, “having” and the like refer to the presence of stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
  • the term “communication network” or “wireless communication network” may refer to a network conforming to any of the following communication standards, such as New Radio (NR, New Radio), Long Term Evolution (LTE, Long Term Evolution), Enhanced Long-term evolution (LTE-A, LTE-Advanced), wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access), high-speed packet access (HSPA, High-Speed Packet Access), etc.
  • NR New Radio
  • New Radio Long Term Evolution
  • LTE-A Long-term evolution
  • LTE-A Long-term evolution
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, 6G, etc., and/or other communication protocols that are currently known or will be developed in the future.
  • 1G generation
  • 2G 2.5G
  • 2.75G 3G
  • 4G 4G
  • 4.5G future 5G, 6G, etc.
  • future 5G, 6G, etc. and/or other communication protocols that are currently known or will be developed in the future.
  • Network device refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device.
  • Network equipment may include but not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller) and so on.
  • the base station may include but not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), and 5G base station (gNB), etc., and may also include Remote Radio Head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femto, pico, etc.).
  • NodeB Node B
  • eNodeB or eNB evolved Node B
  • gNB 5G base station
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low-power node such as femto, pico, etc.
  • base station may include some or all of their functions, each base station may provide communication coverage for a particular geographic area.
  • the term "cell” can refer to a base station and/or its coverage area depending on the context in which the term is used.
  • the term "User Equipment” refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be called “Terminal Equipment” (TE, Terminal Equipment).
  • a terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), terminal, user, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc. wait.
  • the terminal equipment may include but not limited to the following equipment: Cellular Phone (Cellular Phone), Personal Digital Assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication equipment, handheld equipment, machine-type communication equipment, laptop computer, Cordless phones, smartphones, smart watches, digital cameras, and more.
  • Cellular Phone Cellular Phone
  • PDA Personal Digital Assistant
  • wireless modem wireless communication equipment
  • handheld equipment machine-type communication equipment
  • laptop computer Cordless phones
  • Cordless phones smartphones, smart watches, digital cameras, and more.
  • the terminal device can also be a machine or device for monitoring or measurement, such as but not limited to: a machine type communication (MTC, Machine Type Communication) terminal, Vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, etc.
  • MTC Machine Type Communication
  • Vehicle communication terminal device to device (D2D, Device to Device) terminal
  • M2M Machine to Machine
  • Relay UE means a relay-capable terminal device (UE-to-Network Relay UE) that can directly communicate with a network device
  • Remote UE means a terminal device that needs to be relayed through a Relay UE to communicate with a network device Terminal Equipment.
  • the 3rd Generation Partnership Project (3GPP) standardization organization agreed in the meeting that the cell selection/reselection process of the Remote UE (through the Uu interface) and the selection/reselection process of the Relay UE are performed independently.
  • 3GPP 3rd Generation Partnership Project
  • L2UE-to-Network relay layer 2 terminal equipment-network equipment relay
  • the Relay UE and the Remote UE are controlled by the serving cell of the Relay UE.
  • the Relay UE will notify the cell ID of the serving cell where it is located to the Remote UE for the Remote UE to select/reselect the Relay UE.
  • Remote UE may be in radio resource control idle state (RRC_IDLE) or inactive state (RRC_INACTIVE) or active state (RRC_CONNECTED); Relay UE may also be in RRC_IDLE or RRC_INACTIVE or RRC_CONNECTED state, the embodiment of this application does not Not as a limitation.
  • Embodiments of the present application provide an information acquiring method and an information sending method, which are respectively applied to a first terminal device and a second terminal device.
  • the first terminal device may be a Relay UE
  • the second terminal device may be a Remote UE
  • the Relay UE provides the Remote UE with uplink and/or downlink relay transmission to the network.
  • FIG. 4 is a schematic diagram of the method for obtaining information. As shown in FIG. 4, the method is applied to a second terminal device, including:
  • the second terminal device establishes a connection with the first terminal device
  • the second terminal device acquires system information of at least one cell through the first interface and/or the second interface.
  • the second terminal device obtains the system information of the corresponding cell through the first interface and/or the second interface, avoiding the second terminal device from repeatedly obtaining the system information of the same or different cells to save power consumption of the second terminal device; or , so that the second terminal device can acquire correct system information so as to communicate with the network side more accurately.
  • the second terminal device may establish a connection with the first terminal device by performing processes such as relay discovery, relay selection or relay reselection, PC5 unicast link (PC5 unicast link) establishment, etc.
  • the connection is a side link connection, such as PC5-RRC connection or PC5-AS (Access Stratum, access layer) connection or PC5 unicast link (PC5 unicast link), about the relay discovery, relay selection or relay
  • PC5-RRC connection such as PC5-RRC connection or PC5-AS (Access Stratum, access layer) connection or PC5 unicast link (PC5 unicast link)
  • PC5 unicast link PC5 unicast link
  • establishing a connection may include that the second terminal device and the first terminal device are performing a process of establishing a connection, but the connection has not been successfully established, for example, the second terminal device is performing relay discovery or selection ( reselection), etc., or that the connection establishment has not been completed, for example, the second terminal device and the first terminal device are exchanging information related to connection establishment, etc., or it may also include that the second terminal device has successfully established a connection with the first terminal device, This application is not intended to be limited thereto.
  • the first interface is a cellular interface, such as a Uu interface
  • the second interface is a side link interface, such as a PC5 interface
  • the first interface can also be other cellular interfaces, and the second The interface may also be another side link interface, which is not limited in this application.
  • the system information may include MIB and SIB1, or other system information except MIB and SIB1.
  • the system information is periodically broadcast by the network device side or according to the first terminal device and It is broadcast according to the system information request of the second terminal device or sent through a dedicated radio resource control RRC message according to the system information request of the first terminal device and/or the second terminal device.
  • the system information may include system information or updated system information (all), or the system information may only include part of the system information requested by the second terminal device (for example, the second terminal device may send On-demand (on-demand) system information requests this part of system information, how to request will be described later), this embodiment of the present application is not limited by this.
  • the above Fig. 4 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto.
  • the execution order of various operations can be appropriately adjusted, and some other operations can be added or some of them can be reduced.
  • Those skilled in the art may make appropriate modifications based on the above content, and are not limited to the description in FIG. 4 above.
  • 401 may be performed before 402, or may be performed at the same time.
  • the acquiring the system information of at least one cell by the second terminal device through the first interface and/or the second interface includes:
  • the second terminal device obtains the system information of the first cell through the first interface, or,
  • the second terminal device obtains the system information of the second cell through the second interface, or,
  • the second terminal device acquires system information of the first cell through the first interface, and acquires system information of the second cell through the second interface.
  • the second terminal device is within the coverage (in-coverage) of the first cell, and the first cell may also be referred to as a serving cell of the second terminal or a cell where the second terminal resides. Or the cell selected or reselected by the second terminal cell, etc., the second terminal device establishes a connection with the first terminal device, the serving cell of the first terminal device is the second cell, and the second cell and the first cell may be the same Or can be different.
  • the first cell is the same as the second cell; as shown in scene 3, the first cell is different from the second cell.
  • the second terminal device obtains the system information of the first cell through the first interface
  • the second terminal device when the first cell and the second cell are the same, that is, there is system information of a cell, the second terminal device needs to obtain the system information of a cell, and the second terminal device obtains the system information of the first cell through the first interface.
  • the system information of a cell does not need to be obtained through the second interface; or, when the first cell and the second cell are different, that is, the system information of the first cell and the system information of the second cell exist, and the second The terminal device obtains the system information of the first cell through the first interface, and does not receive (the first terminal device) the system information sent through the second interface, or does not obtain the system information through the second interface.
  • the second terminal device obtains the system information of the second cell through the second interface
  • the second terminal device when the first cell and the second cell are the same, that is, there is system information of a cell, the second terminal device obtains the system information of the second cell (or the first cell) through the second interface; Or, when the first cell and the second cell are different, that is, there are system information of the first cell and system information of the second cell, the second terminal device obtains the system information of the second cell through the second interface, and does not receive The system information is sent through the first interface, or the system information is not obtained through the first interface.
  • the second terminal device does not need to consider whether the second cell is the same as the first cell, and only obtains the system information of the second cell through the second interface without receiving the system information sent through the first interface, In other words, the system information is not acquired through the first interface.
  • the second terminal device obtains the system information of the first cell through the first interface, and obtains the system information of the second cell through the second interface
  • the second terminal device obtains the system information of the first cell through the first interface, The system information of the second cell is obtained through the second interface.
  • the system information of one cell may not be used or discarded.
  • the first terminal device may forward or not forward the system information of the second cell to the second terminal device.
  • FIG. 5 is a schematic diagram of the information sending method. As shown in FIG. 5, the method is applied to the first terminal device, including:
  • the first terminal device establishes a connection with the second terminal device
  • the first terminal device forwards or does not forward the system information of the second cell to the second terminal device.
  • the first terminal device can forward or not forward the correct system information to the second terminal device, so that the second terminal device can obtain the correct system information, so that the communication with the network side is more accurate.
  • the first terminal device may actively forward the system information of the second cell, or forward the system information of the second cell when receiving the system information request sent by the second terminal device, or forward the system information of the second cell when not receiving the system information request sent by the second terminal device.
  • the second terminal device sends the system information request, it does not actively forward the system information of the second cell. Specifically, it will be described in detail in the embodiments described later.
  • Embodiments of the present application provide an information acquiring method and an information sending method, which are applied to a first terminal device and a second terminal device.
  • a first terminal device and a second terminal device.
  • the embodiment of the first aspect please refer to the embodiment of the first aspect for details, and details are not repeated here.
  • the second terminal device when the first condition is met, obtains the system information of the second cell through the second interface, and optionally, does not receive the system information sent through the first interface, or does not The interface acquires system information, or does not need to receive system information sent through the first interface.
  • the first condition includes at least one of the following conditions:
  • the second terminal device determines whether to select/reselect the first terminal device as a relay
  • the second terminal device is in the process of establishing an RRC connection with the second cell through the first terminal device;
  • the second terminal device when the second terminal device judges whether the second cell allows the second terminal device to access, and/or judges whether to select/reselect the first terminal device as a relay, it only needs to rely on the second Therefore, regardless of whether the first cell and the second cell are the same, the second terminal device (only) receives the system information of the second cell forwarded by the first terminal device through the second interface.
  • the second terminal device receives the system information of the second cell forwarded by the first terminal device through the second interface.
  • the second terminal device may send a system information request to the first terminal device, and upon receiving the system information request, the first terminal device forwards the system information of the second cell to the second terminal through the second interface
  • the system information request may be an on-demand system information request (on-demand SI request)
  • the on-demand system information request includes the type of part of the system information requested, but the embodiment of the present application This is not a limitation.
  • the system information request is an on-demand system information request (on-demand SI request)
  • the forwarded system information may be part of the requested system information.
  • the first terminal device when the second terminal device does not send a system information request to the first terminal device, the first terminal device does not (actively) forward the system information of the second cell to the second terminal device.
  • Fig. 6 is a schematic diagram of the system information acquisition method.
  • the network device of the second cell sends the system information to the first terminal device.
  • the second terminal device can send the system information to the first terminal device.
  • the first terminal device forwards the system information to the second terminal device.
  • the first terminal device when the first terminal device receives the system information requested by the second terminal device, if the requested system information has not been stored (obtained), the first terminal device can forward the system information of the second terminal device The request is sent to the network device in the second cell, so that the network device sends the system information requested by the second terminal device, and after the first terminal device receives the system information, the first terminal device forwards the system information to the second terminal device.
  • the second terminal device obtains the system information of the corresponding cell through the second interface, avoiding the second terminal device from repeatedly obtaining system information to save power consumption of the second terminal device; it is possible to enable the second terminal device to obtain correct system information for The communication with the network side is more accurate.
  • the second terminal device obtains the system information of the second cell through the second interface without considering whether the first cell and the second cell are the same, but this embodiment of the present application is not limited thereto.
  • the second terminal device acquires system information in different ways, which will be described below in conjunction with embodiments of the third aspect and the fourth aspect respectively.
  • Fig. 7 is a scene where the first cell and the second cell are the same, which will be described below in conjunction with Fig. 7 .
  • the second terminal device obtains the system information of the first cell (that is, the second cell) through the first interface, and does not need to obtain the system information of the first cell (that is, the second cell) through the second interface , or in other words, there is no need to request the first terminal device for the system information of the first cell (that is, the second cell).
  • the second terminal device can directly obtain the system information broadcast by the network device through the first interface (Uu interface); if the network device has not broadcast system information, the second terminal device The terminal device may request the network device to send the requested system information by sending a system information request (for example, an on-demand SI request), and the network device may send the requested system information by broadcasting or through a dedicated RRC message system message.
  • a system information request for example, an on-demand SI request
  • RRC message system message dedicated RRC message system message
  • the second terminal device monitors the paging short message (Short Message) on the first interface or receives the system information change indication information sent by the first terminal device through the second interface, so as to determine Whether there is a system information update.
  • Short Message the paging short message
  • the Short Message may be sent in a Physical Downlink Control Channel (PDCCH) using a Paging Radio Network Temporary Identifier (P-RNTI), using Downlink Control Information (Downlink Control Information, DCI) format 1_0 sent in the Short Message field.
  • P-RNTI Paging Radio Network Temporary Identifier
  • DCI Downlink Control Information
  • the format of the Short Message is as follows, Bit 1 is the highest bit.
  • the system information change indication information may be sent in a PC5-RRC message, sent by the first terminal device to the second terminal device, and the system information change indication information may contain 1 bit, which is applicable to all but SIB6, SIB7 and SIB8 It can also explicitly indicate which system information block (SIB) or system information message (SI message) changes, such as corresponding to each SIB or SI message through a bitmap bitmap, and one of the SIB or SI message corresponds to If the bit is 1, it indicates that the SIB or SI message has changed, and vice versa. Whether the Tsunami Warning System (Earthquake and Tsunami Warning System, ETWS) and the Commercial Mobile Alert System (Commercial Mobile Alert System, CMAS) have notification information, etc.
  • Tsunami Warning System Earthquake and Tsunami Warning System, ETWS
  • CMAS Commercial Mobile Alert System
  • the network device in the first cell needs to send a paging message to the second terminal device, for example, the second terminal device receives the paging message forwarded by the first terminal device through the second interface, or receives the paging message from the The first interface receives a paging message, and the second terminal device is a terminal device in an idle or inactive state.
  • the second terminal device since the second terminal device does not need to obtain the system information of the first cell (that is, the second cell) through the second interface, or does not need to request the first terminal device for the system information of the first cell (that is, the second cell) The system information of the second cell), therefore, when the fifth condition is met, the first terminal device does not need to (actively) forward the system information of the first cell (that is, the second cell) to the second terminal device, the fifth The condition is that the second terminal device is within the coverage of the second cell, or in other words, the first cell and the second cell are the same.
  • the first terminal device determines that the second terminal device is within the coverage of the second cell according to the identity of the cell within the coverage of the second terminal device during the discovery process, that is, the first terminal device and the second terminal device are establishing a connection
  • the first terminal device obtains the identifier of the first cell of the second terminal device, for example, the second terminal device may notify the first terminal device of the information of the first cell
  • the first terminal device determines that the identity of the first cell is the same as the identity of the second cell, it is determined that the second terminal device is within the coverage of the second cell, and the first terminal device does not need to (actively) forward the first cell (also That is, the system information of the second cell) is sent to the second terminal device.
  • the identifier of the cell may be a cell identity (cell Identity) or cell global identity information (such as including PLMN Identity and cell Identity, etc.) or a physical cell identity (Physical Cell Identifier, PCI) and/or frequency information (such as the frequency where the SSB is located) )wait.
  • cell Identity cell Identity
  • cell global identity information such as including PLMN Identity and cell Identity, etc.
  • PCI Physical Cell Identifier
  • frequency information such as the frequency where the SSB is located
  • the first terminal device does not need to (actively) forward the system information of the first cell (that is, the second cell) to the second terminal device
  • the first terminal device can transmit the system information of the second cell to the second terminal device via the second interface.
  • the device sends an indication of system information change or a paging message, which is specifically as described above, and will not be repeated here.
  • Figure 8 is a schematic diagram of the system information acquisition method, as shown in Figure 8, the first terminal device and the second terminal device establish a connection process, the first terminal device obtains the identity of the first cell, and determines the identity of the first cell and the identity of the second cell IDs are the same, the first terminal device does not (actively) forward the system information of the first cell (that is, the second cell) to the second terminal device, and the first terminal device and the second terminal device can obtain the information of the first cell through the first interface. (that is, the system information of the network equipment (broadcast) of the second cell).
  • the first terminal device and the second terminal device establish a connection process, the first terminal device obtains the identity of the first cell, and determines the identity of the first cell and the identity of the second cell IDs are the same, the first terminal device does not (actively) forward the system information of the first cell (that is, the second cell) to the second terminal device, and the first terminal device and the second terminal device can obtain the information of the first cell through the first interface. (that
  • the second terminal device obtains the system information of the second cell (that is, the first cell) through the second interface; for example, when the second condition is met, the second terminal device obtains the system information of the second cell through the second interface (that is, the system information of the first cell), the second condition includes: the system information of the second cell is updated, that is, when the system information of the second cell (that is, the first cell) is updated, the second terminal device The system information of the second cell (that is, the first cell) is acquired through the second interface.
  • the second terminal device does not need to send a system information request to the first terminal device, but can obtain the system information actively forwarded by the first terminal device through the second interface, or can also send a system information request to the first terminal device (for example, periodically Send an on-demand system information request), and obtain the system information forwarded by the first terminal device through the second interface.
  • the first terminal device when the fourth condition is met, the first terminal device may (actively) forward the updated system information to the second terminal device through the second interface, the fourth condition includes: the system information of the second cell is updated, That is to say, when the system information of the second cell (that is, the first cell) is updated, the second terminal device does not need to send a system information request, and the first terminal device actively forwards the updated system information to the second terminal through the second interface. equipment.
  • Fig. 9 is a schematic diagram of the system information acquisition method.
  • the first terminal device may (actively) forward the updated system information to the second terminal device through the second interface.
  • the second terminal device does not need to send a system information request, and may directly obtain the system information of the second cell (that is, the first cell) forwarded by the first terminal device through the second interface.
  • the first terminal device may forward all system information or all updated system information, or system information requested by the second terminal device before.
  • the second terminal device may also send a system information request, and the first terminal device does not actively forward the updated system information, but forwards the updated system information through the second interface after receiving the system information request.
  • the system information is sent to the second terminal device.
  • the second terminal device may periodically (periodically) send an on-demand system information request to the first terminal device to obtain updated system information.
  • the first terminal device may forward system information to the second terminal device through the second interface, where the fourth condition includes: the first terminal device receives a system information request sent by the second terminal device.
  • Fig. 10 is a schematic diagram of the method for obtaining system information.
  • the second terminal device may periodically (periodically) send (on demand) a system information request to the first terminal device, and the first terminal device may After the system information is requested, the updated system information may be forwarded to the second terminal device through the second interface.
  • Figure 11 is a scene where the first cell and the second cell are different, and the following is combined with Figure 11 Be explained.
  • the second terminal device obtains the system information of the first cell through the first interface, and does not receive the system information of the second cell forwarded by the first terminal device through the second interface.
  • the first terminal device may not (actively) forward the system information to the second terminal device.
  • the fifth condition includes: the second terminal device is within the coverage of the first cell.
  • the second terminal device can directly obtain the system information broadcast by the network device through the first interface (Uu interface); if the network device has not broadcast system information, the second terminal device The terminal device may request the network device to send the requested system information by sending a system information request (for example, an on-demand system information request (on-demand SI request), and the network may send the system information through broadcast or through a dedicated RRC message.
  • a system information request for example, an on-demand system information request (on-demand SI request)
  • on-demand SI request on-demand SI request
  • Figure 12 is a schematic diagram of the system information acquisition method, as shown in Figure 12, the network device of the second cell sends system information to the first terminal device, but the first terminal device does not actively forward the system information of the second cell to the second terminal device, the network device of the first cell sends system information to the second terminal device, and the second terminal device obtains the system information of the first cell through the first interface.
  • the second terminal device receives the system information of the second cell forwarded by the first terminal device through the second interface, and does not receive the system information of the first cell through the first interface.
  • the second terminal device when the third condition is met, only receives the system information of the second cell forwarded by the first terminal device through the second interface, and does not receive the system information of the first cell through the first interface.
  • This third condition includes at least one of the following conditions:
  • the second terminal device has already selected or reselected the first terminal device, and no longer performs cell selection or reselection;
  • the second terminal device is released from the connected state to the idle or inactive state
  • the second terminal device is in the process of establishing an RRC connection with the second cell through the first terminal device
  • the second terminal device when the second terminal device has already selected or reselected the first terminal device, cell selection or reselection is no longer performed; or the second terminal device is released from the connected state to the idle or inactive state; or the second terminal device
  • the terminal device judges whether the second cell allows the second terminal device to access, it does not need to consider the system information of the first cell, but only needs to rely on the system information of the second cell. Therefore, the second terminal device only receives The system information of the second cell forwarded through the second interface does not receive the system information of the first cell through the first interface.
  • the second terminal device when the second terminal device establishes an RRC connection with the second cell through the first terminal device, or after the second terminal device enters the connected state through the first terminal device, there is no need to consider the first cell
  • the system information of the second cell only needs the system information of the second cell, therefore, the second terminal device only receives the system information of the second cell forwarded by the first terminal device through the second interface, and does not receive the system information of the first cell through the first interface .
  • the second terminal device does not need to send a system information request to the first terminal device, but can obtain the system information actively forwarded by the first terminal device through the second interface, or can also send a system information request to the first terminal device (for example, an on-demand system information request), and obtain the system information forwarded by the first terminal device through the second interface.
  • the first terminal device may (actively) forward system information to the second terminal device through the second interface
  • the fourth condition includes: after the first terminal device establishes a connection with the second terminal device , that is to say, after the first terminal device establishes a connection with the second terminal device, the second terminal device does not need to send a system information request, and the first terminal device actively forwards the updated system information to the second terminal device through the second interface
  • the fourth condition may include: the first terminal device and the second terminal device have not completed connection establishment, but in this case, the system information may be established by a discovery message or a message related to PC5 link (such as direct communication request and/or direct communication accept) bearer, that is, when the first terminal device fails to establish a connection with the second terminal device, the second terminal device does not need to send a system information request, and the first terminal device actively communicates through the second interface
  • the system information is forwarded to the second terminal device, and the system information is carried by a discovery message or a message related to
  • Figure 13 is a schematic diagram of the system information acquisition method.
  • the first terminal device can (actively) forward the system information of the second cell to the second terminal device through the second interface, and the second terminal device does not need to send a system information request , the system information of the second cell (that is, the first cell) forwarded by the first terminal device may be obtained directly through the second interface, and the system information of the first cell is not received through the first interface.
  • the second terminal device may also send a system information request (for example, an on-demand system information request), and the first terminal device does not actively forward the system information of the second cell, but after receiving the system information request , forwarding the system information of the second cell to the second terminal device through the second interface.
  • a system information request for example, an on-demand system information request
  • the first terminal device may forward system information to the second terminal device through the second interface, where the fourth condition includes: the first terminal device receives a system information request sent by the second terminal device.
  • Fig. 14 is a schematic diagram of the system information acquisition method.
  • the second terminal device can send (on demand) a system information request to the first terminal device, and after receiving the system information request, the first terminal device can The system information of the second cell is forwarded to the second terminal device through the second interface, and the system information of the first cell is not received through the first interface.
  • the second terminal device obtains the system information of the first cell through the first interface, and, when the first condition is met, the second terminal device receives the system information forwarded by the first terminal device through the second interface. information.
  • the first condition includes at least one of the following conditions:
  • the second terminal device determines whether to select/reselect the first terminal device as a relay
  • the second terminal device is in the process of establishing an RRC connection with the second cell through the first terminal device;
  • the second terminal device when the second terminal device judges whether the second cell allows the second terminal device to access, and/or judges whether to select/reselect the first terminal device as a relay, it needs to rely on the information of the second cell. System information. Therefore, the second terminal device receives the system information of the second cell forwarded by the first terminal device through the second interface.
  • the second terminal device establishes an RRC connection with the second cell through the first terminal device; and/or after the second terminal device enters the connected state through the first terminal device, the second The terminal device receives the system information of the second cell forwarded by the first terminal device through the second interface.
  • the second terminal device does not need to send a system information request to the first terminal device, but can obtain the system information actively forwarded by the first terminal device through the second interface, or can also send a system information request to the first terminal device (for example, an on-demand system information request), and obtain the system information forwarded by the first terminal device through the second interface.
  • the first terminal device may (actively) forward system information to the second terminal device through the second interface
  • the fourth condition includes: after the first terminal device establishes a connection with the second terminal device , that is to say, after the first terminal device establishes a connection with the second terminal device, the second terminal device does not need to send a system information request, and the first terminal device actively forwards the updated system information to the second terminal device through the second interface
  • the fourth condition may include: the first terminal device and the second terminal device have not completed connection establishment, but in this case, the system information may be established by a discovery message or a message related to PC5 link (such as direct communication request and/or direct communication accept) bearer, that is, when the first terminal device fails to establish a connection with the second terminal device, the second terminal device does not need to send a system information request, and the first terminal device actively communicates through the second interface
  • the system information is forwarded to the second terminal device, and the system information is carried by a discovery message or a message related to
  • Figure 15 is a schematic diagram of the system information acquisition method.
  • the first terminal device can (actively) forward the system information of the second cell to the second terminal device through the second interface, and the second terminal device does not need to send a system information request , the system information of the second cell (that is, the first cell) forwarded by the first terminal device may be obtained directly through the second interface, and the system information of the first cell is also received through the first interface.
  • the second terminal device may also send a system information request (for example, an on-demand system information request), and the first terminal device does not actively forward the system information of the second cell, but after receiving the system information request , forwarding the system information of the second cell to the second terminal device through the second interface.
  • a system information request for example, an on-demand system information request
  • the first terminal device may forward system information to the second terminal device through the second interface, where the fourth condition includes: the first terminal device receives a system information request sent by the second terminal device.
  • Fig. 16 is a schematic diagram of the system information acquisition method.
  • the second terminal device can send (on demand) a system information request to the first terminal device, and after receiving the system information request, the first terminal device can The system information of the second cell is forwarded to the second terminal device through the second interface, and the system information of the first cell is also received through the first interface.
  • the following describes how the second terminal device uses the above system information after acquiring the system information of the two cells.
  • the second terminal device uses system information of the second cell.
  • the second terminal device uses the system information of the first cell obtained through the first interface to perform cell selection or cell reselection, and the second terminal device is in an idle or inactive state.
  • the second terminal device may store the system information of the first cell and the second cell.
  • the second terminal device obtains the system information of the first cell through the first interface, and obtains the system information of the second cell forwarded by the first terminal device through the second interface, but the second cell may not be used or discarded system information.
  • the second terminal device is within the coverage of the first cell, and the first terminal device may not (actively) forward the system information of the second cell to the second terminal device, including that the second terminal device may forward the system information of the second cell to the second terminal device.
  • the first terminal device sends a system information request, and when receiving the system information request, the first terminal device forwards the system information of the second cell to the second terminal device. When the first terminal device does not receive the system information request, it does not forward the system information of the second cell to the second terminal device.
  • the second terminal device can directly obtain the system information broadcast by the network device through the first interface (Uu interface); if the network device has not broadcast system information, the second terminal device The terminal device may request the network device to send the requested system information by sending a system information request (for example, an on-demand SI request), and the network device may send the requested system information by broadcasting or through a dedicated RRC message system message.
  • a system information request for example, an on-demand SI request
  • RRC message system message dedicated RRC message system message
  • Figure 17 is a schematic diagram of the system information acquisition method, as shown in Figure 17, the network device of the second cell sends system information to the first terminal device, but the first terminal device does not actively forward the system information of the second cell to the second terminal device, the network device of the first cell sends system information to the second terminal device, and the second terminal device obtains the system information of the first cell through the first interface.
  • the second terminal device sends a system information request to the first terminal device, the first terminal device forwards the system information of the second cell to the second terminal device, and the second terminal device does not use or discards the system information of the second cell.
  • the second terminal device receives the system information of the second cell forwarded by the first terminal device through the second interface, and also receives the system information of the first cell through the first interface, but may not use or discard the first System information of the community.
  • the second terminal device receives the system information of the second cell forwarded by the first terminal device through the second interface, and also receives the system information of the first cell through the first interface.
  • This third condition is at least one of the following conditions:
  • the second terminal device has already selected or reselected the first terminal device, and no longer performs cell selection or reselection;
  • the second terminal device is released from the connected state to the idle or inactive state
  • the second terminal device is in the process of establishing an RRC connection with the second cell through the first terminal device
  • the second terminal device when the second terminal device has already selected or reselected the first terminal device, cell selection or reselection is no longer performed; or the second terminal device is released from the connected state to the idle or inactive state; or the second terminal device
  • the terminal device judges whether the second cell allows the second terminal device to access, it does not need to consider the system information of the first cell, but only needs to rely on the system information of the second cell. Therefore, the second terminal device receives the information passed by the first terminal device.
  • the system information of the second cell forwarded by the second interface, in addition, the system information of the first cell is received through the first interface, but the system information of the first cell may not be used or discarded.
  • the second terminal device when the second terminal device establishes an RRC connection with the second cell through the first terminal device, or after the second terminal device enters the connected state through the first terminal device, there is no need to consider the first cell
  • the system information of the second cell only needs the system information of the second cell. Therefore, the second terminal device only receives the system information of the second cell forwarded by the first terminal device through the second interface. In addition, it receives the system information of the first cell through the first interface. information, but the system information of the first cell may not be used or discarded.
  • the second terminal device does not need to send a system information request to the first terminal device, but can obtain the system information actively forwarded by the first terminal device through the second interface, or can also send a system information request to the first terminal device (for example, an on-demand system information request), and obtain the system information forwarded by the first terminal device through the second interface.
  • the first terminal device may (actively) forward system information to the second terminal device through the second interface
  • the fourth condition includes: after the first terminal device establishes a connection with the second terminal device , that is to say, after the first terminal device establishes a connection with the second terminal device, the second terminal device does not need to send a system information request, and the first terminal device actively forwards the updated system information to the second terminal device through the second interface
  • the fourth condition may include: the first terminal device has not completed connection establishment with the second terminal device, but in this case, the system information may be carried by a discovery message or a message related to PC5 unicast link establishment, That is to say, when the first terminal device fails to establish a connection with the second terminal device, the second terminal device does not need to send a system information request, and the first terminal device actively forwards the system information to the second terminal device through the second interface.
  • System information is carried by discovery messages.
  • Figure 18 is a schematic diagram of the system information acquisition method.
  • the first terminal device can (actively) forward the system information of the second cell to the second terminal device through the second interface, and the second terminal device does not need to send a system information request , the system information of the second cell (that is, the first cell) forwarded by the first terminal device can be obtained directly through the second interface, and the system information of the first cell is received through the first interface, but the first cell is discarded or not used system information.
  • the second terminal device may also send a system information request (for example, an on-demand system information request), and the first terminal device does not actively forward the system information of the second cell, but after receiving the system information request , forwarding the system information of the second cell to the second terminal device through the second interface.
  • a system information request for example, an on-demand system information request
  • the first terminal device may forward system information to the second terminal device through the second interface, where the fourth condition includes: the first terminal device receives a system information request sent by the second terminal device.
  • Fig. 19 is a schematic diagram of the system information acquisition method.
  • the second terminal device can send (on demand) a system information request to the first terminal device, and after receiving the system information request, the first terminal device can The system information of the second cell is forwarded to the second terminal device through the second interface, and the system information of the first cell is received through the first interface, but the system information of the first cell is discarded or not used.
  • the second terminal device can acquire correct system information so as to communicate with the network side more accurately.
  • An embodiment of the present application provides an information acquisition apparatus configured on a second terminal device.
  • Fig. 20 is a schematic diagram of an information acquisition apparatus according to an embodiment of the present application, and this embodiment of the present application is described from the side of the second terminal device.
  • the implementation principle of the information acquisition device in the embodiment of the present application is similar to the implementation of the embodiments in the first aspect to the fourth aspect, and the same content will not be described again.
  • the information acquisition device 2000 of the embodiment of the present application includes:
  • a first connection establishing unit 2001 which establishes a connection with the first terminal device
  • a receiving unit 2002 configured to acquire system information of at least one cell through a first interface and/or a second interface.
  • the receiving unit 2002 acquiring the system information of at least one cell through the first interface and/or the second interface includes:
  • the receiving unit 2002 acquires the system information of the first cell through the first interface, or,
  • the receiving unit 2002 acquires the system information of the second cell through the second interface, or,
  • the receiving unit 2002 acquires system information of the first cell through the first interface, and acquires system information of the second cell through the second interface.
  • the receiving unit 2002 when the receiving unit 2002 obtains the system information of the first cell through the first interface, the receiving unit 2002 does not receive the system information of the second cell forwarded by the first terminal device through the second interface.
  • the first cell is a cell within coverage of the second terminal device; the second cell is a serving cell of the first terminal device; and, the second cell is the same as or different from the first cell.
  • the receiving unit 2002 when the receiving unit 2002 obtains the system information of the first cell through the first interface, the receiving unit 2002 monitors the paging short message (Short Message) on the first interface or receives the first terminal device through the second interface Sent system information change indication information.
  • the paging short message Short Message
  • the receiving unit 2002 when the receiving unit 2002 obtains the system information of the first cell through the first interface, the receiving unit 2002 receives the paging message forwarded by the first terminal device through the second interface, or receives the paging message from the first interface . Wherein, the second terminal device is in an idle or inactive state.
  • the receiving unit 2002 obtaining the system information of the second cell through the second interface includes:
  • the receiving unit 2002 receives the system information of the second cell forwarded by the first terminal device through the second interface.
  • the receiving unit 2002 obtaining the system information of the second cell through the second interface includes:
  • the receiving unit 2002 When the receiving unit 2002 acquires the system information of the second cell through the second interface, the receiving unit 2002 does not acquire the system information of the first cell through the first interface.
  • the receiving unit 2002 acquires the system information of the second cell through the second interface.
  • the device may also include: (optional, not shown)
  • a sending unit configured to send a system information request message to the first terminal device.
  • the sending unit periodically sends a system information request message to the first terminal device.
  • the receiving unit 2002 acquires the system information of the first cell through the first interface, and acquires the system information of the second cell through the second interface includes:
  • the receiving unit 2002 acquires the system information of the first cell through the first interface, and,
  • the receiving unit 2002 When the first condition is met, the receiving unit 2002 receives the system information forwarded by the first terminal device through the second interface; or when the first terminal device establishes a connection with the second terminal device, the receiving unit 2002 receives the The system information forwarded by the interface; or when the connection establishment between the first terminal device and the second terminal device has not been completed, the receiving unit 2002 receives the system information forwarded by the first terminal device through the second interface, and the system information is established by a discovery message or a PC5 connection Related message bearer.
  • the device may also include: (optional, not shown)
  • a selection unit uses the system information of the first cell obtained through the first interface to perform cell selection or cell reselection; wherein, the second terminal device is in an idle or inactive state.
  • the second terminal device discards or does not use the system information of the first cell obtained through the first interface or the system information of the second cell obtained through the second interface.
  • the second terminal device when the third condition is met, discards or does not use the system information of the first cell obtained through the first interface,
  • the third condition includes at least one of the following conditions:
  • the second terminal device has selected or reselected the first terminal device, and no longer performs cell selection or reselection;
  • the second terminal device is released from the connected state to the idle or inactive state
  • the second terminal device is in the process of establishing an RRC connection with the second cell through the first terminal device
  • the first condition includes at least one of the following conditions:
  • the second terminal device determines whether to select/reselect the first terminal device as a relay
  • the second terminal device is in the process of establishing an RRC connection with the second cell through the first terminal device;
  • the second condition includes: system information of the second cell is updated.
  • the system information includes system information or updated system information or part of the system information requested by the second terminal device.
  • the first interface is a cellular interface; the second interface is a sidelink interface.
  • the information acquisition apparatus 2000 in the embodiment of the present application may also include other components or modules, and for specific content of these components or modules, reference may be made to related technologies.
  • FIG. 20 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used.
  • the above-mentioned components or modules may be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc.; the implementation of the present application is not limited thereto.
  • the second terminal device obtains the system information of the corresponding cell through the first interface and/or the second interface, avoiding the second terminal device from repeatedly obtaining the system information of the same or different cells to save power consumption of the second terminal device; or , so that the second terminal device can acquire correct system information so as to communicate with the network side more accurately.
  • An embodiment of the present application provides an information sending apparatus configured on a first terminal device.
  • Fig. 21 is a schematic diagram of an information sending apparatus according to an embodiment of the present application, and this embodiment of the present application is described from the side of the first terminal device.
  • the implementation principle of the information sending device in the embodiment of the present application is similar to the implementation of the embodiments in the first to fourth aspects, and the same content will not be described again.
  • the information sending device 2100 in the embodiment of the present application includes:
  • a second connection establishing unit 2101 which establishes a connection with the second terminal device
  • a sending unit 2102 which forwards or does not forward the system information of the second cell to the second terminal device.
  • the sending unit 2102 forwards the system information of the second cell to the second terminal device through the second interface.
  • the sending unit 2102 when the fifth condition is met, the sending unit 2102 does not forward the system information of the second cell to the second terminal device.
  • the fourth condition includes: the system information of the second cell is updated or the first terminal device receives a system information request sent by the second terminal device or the first terminal device establishes a connection with the second terminal device or the The connection establishment between the first terminal device and the second terminal device has not been completed.
  • the system information is carried by a discovery message or a message related to PC5 connection establishment.
  • the first terminal device does not receive the system information request message sent by the second terminal device.
  • the fifth condition includes: the second terminal device is within the coverage of the second cell or the second terminal device is within the coverage of the first cell or the second terminal device is not within the second cell within the coverage of the cell but within the coverage of the first cell.
  • the first terminal device determines that the second terminal device is within the coverage of the second cell according to the identity of the cell within the coverage of the second terminal device during the discovery process.
  • the device may also include: (optional, not shown)
  • a receiving unit configured to receive the system information request message sent by the second terminal device.
  • the sending unit 2102 further forwards the indication of system information change of the second cell or the paging message to the second terminal device through the second interface.
  • the system information includes system information or updated system information or part of the system information requested by the second terminal device.
  • the first interface is a cellular interface; the second interface is a sidelink interface.
  • the first terminal device can forward or not forward the correct system information to the second terminal device, so that the second terminal device can obtain the correct system information, so that the communication with the network side is more accurate.
  • the information sending apparatus 2100 in the embodiment of the present application may further include other components or modules, and for specific content of these components or modules, reference may be made to related technologies.
  • FIG. 21 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used.
  • the above-mentioned components or modules may be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc.; the implementation of the present application is not limited thereto.
  • FIG. 22 is a schematic diagram of the communication system 2200. As shown in FIG. 22, the communication system 2200 includes a network device 2201, a first terminal device 2202, and at least one second terminal device 2203;
  • the first terminal device 2202 is configured to execute the methods in the embodiments of the first to fourth aspects, which may include the apparatus in FIG. 20 .
  • the second terminal device 2203 is configured to execute the methods in the embodiments of the first to fourth aspects, which may include the apparatus in FIG. 21 .
  • the embodiment of the present application also provides a terminal device.
  • FIG. 23 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 2300 may include a processor 2301 and a memory 2302 ; the memory 2302 stores data and programs, and is coupled to the processor 2301 . It is worth noting that this figure is exemplary; other types of structures may also be used in addition to or instead of this structure to implement telecommunication functions or other functions.
  • the processor 2301 may be configured to execute a program to implement the methods in the embodiments of the first to fourth aspects.
  • the terminal device 2300 may further include: a communication module 2303 , an input unit 2304 , a display 2305 , and a power supply 2306 .
  • a communication module 2303 the terminal device 2300 may further include: a communication module 2303 , an input unit 2304 , a display 2305 , and a power supply 2306 .
  • the functions of the above components are similar to those of the prior art, and will not be repeated here. It should be noted that the terminal device 2300 does not necessarily include all the components shown in FIG. have technology.
  • the embodiment of the present application also provides a network device.
  • Fig. 24 is a schematic diagram of a network device according to an embodiment of the present application.
  • a network device 2400 may include: a processor (such as a central processing unit CPU) 2401 and a memory 2402 ; the memory 2402 is coupled to the processor 2401 .
  • the memory 2402 can store various data; in addition, it also stores information processing programs, and executes the programs under the control of the central processing unit 2401 .
  • the processor 2401 may be configured to execute a program to implement the methods in the embodiments of the first to fourth aspects.
  • the network device 2400 may further include: a transceiver 2403 and an antenna 2404 , etc.; where the functions of the above components are similar to those of the prior art, and will not be repeated here. It should be noted that the network device 2400 does not necessarily include all the components shown in FIG. 24 ; in addition, the network device 2400 may also include components not shown in FIG. 24 , and reference may be made to the prior art.
  • the embodiment of the present application also provides a computer-readable program, wherein when the program is executed in the terminal device, the program causes the computer to execute the program in the embodiments of the first to fourth aspects in the first terminal device. method.
  • the embodiment of the present application also provides a storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to execute the methods in the embodiments of the first to fourth aspects in a terminal device.
  • the above devices and methods in this application can be implemented by hardware, or by combining hardware and software.
  • the present application relates to a computer-readable program that, when executed by a logic component, enables the logic component to realize the above-mentioned device or constituent component, or enables the logic component to realize the above-mentioned various methods or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present application also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memories, and the like.
  • the method/device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of both.
  • one or more of the functional block diagrams shown in the figure and/or one or more combinations of the functional block diagrams may correspond to each software module or each hardware module of the computer program flow.
  • These software modules may respectively correspond to the steps shown in the figure.
  • These hardware modules for example, can be realized by solidifying these software modules by using a Field Programmable Gate Array (FPGA).
  • FPGA Field Programmable Gate Array
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art.
  • a storage medium can be coupled to the processor such that the processor can read information from, and write information to, the storage medium, or it can be an integral part of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal.
  • the software module can be stored in the MEGA-SIM card or large-capacity flash memory device.
  • One or more of the functional blocks described in the accompanying drawings and/or one or more combinations of the functional blocks can be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in this application ), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof.
  • DSP digital signal processor
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors processor, one or more microprocessors in communication with a DSP, or any other such configuration.
  • a method for obtaining information, applied to a second terminal device characterized in that the method comprises:
  • the second terminal device establishes a connection with the first terminal device
  • the second terminal device acquires system information of at least one cell through the first interface and/or the second interface.
  • the second terminal device obtains the system information of the first cell through the first interface, or,
  • the second terminal device obtains the system information of the second cell through the second interface, or,
  • the second terminal device obtains the system information of the first cell through the first interface, and obtains the system information of the second cell through the second interface.
  • the second terminal device does not receive the system information of the second cell forwarded by the first terminal device through the second interface.
  • the second terminal device monitors a paging short message (Short Message) on the first interface or receives system information change indication information sent by the first terminal device through the second interface.
  • Short Message paging short message
  • the second terminal device receives the paging message forwarded by the first terminal device through the second interface, or receives the paging message from the first interface.
  • the second terminal device receives the system information of the second cell forwarded by the first terminal device through the second interface.
  • the method further includes:
  • the second terminal device does not acquire the system information of the first cell through the first interface.
  • the second terminal device sends a system information request message to the first terminal device.
  • the second terminal device acquires system information of the first cell through the first interface, and,
  • the second terminal device When the first condition is met, the second terminal device receives the system information forwarded by the first terminal device through the second interface; or when the first terminal device establishes a connection with the second terminal device, The second terminal device receives the system information forwarded by the first terminal device through the second interface; or when the connection establishment between the first terminal device and the second terminal device has not been completed, the second terminal The device receives the system information forwarded by the first terminal device through the second interface, and the system information is carried by a discovery message or a message related to PC5 connection establishment.
  • the second terminal device uses the system information of the first cell obtained through the first interface to perform cell selection or cell reselection.
  • the second terminal device discards or does not use the system information of the first cell obtained through the first interface or the system information of the second cell obtained through the second interface.
  • the second terminal device has already selected or reselected the first terminal device, and no longer performs cell selection or reselection;
  • said second terminal device is released from a connected state to an idle or inactive state
  • the second terminal device determines whether the second cell allows access by the second terminal device
  • the second terminal device is in the process of establishing an RRC connection with the second cell through the first terminal device
  • the second terminal device determines whether the second cell allows access by the second terminal device.
  • the second terminal device determines whether to select/reselect the first terminal device as a relay
  • the second terminal device is in the process of establishing an RRC connection with the second cell through the first terminal device;
  • the second terminal device sends a system information request message to the first terminal device.
  • system information includes system information or updated system information or part of the system information requested by the second terminal device.
  • a method for sending information, applied to a first terminal device characterized in that the method comprises:
  • the first terminal device establishes a connection with the second terminal device
  • the first terminal device forwards or does not forward the system information of the second cell to the second terminal device.
  • the first terminal device forwards the system information of the second cell to the second terminal device through the second interface.
  • the first terminal device does not forward the system information of the second cell to the second terminal device.
  • the fourth condition includes: the system information of the second cell is updated or the first terminal device receives a system information request sent by the second terminal device or the first terminal device and the second terminal device After the connection is established or the connection establishment between the first terminal device and the second terminal device has not been completed.
  • the fifth condition includes: the second terminal device is within the coverage of the second cell, or the second terminal device is within the coverage of the first cell, or the second terminal device is not within the coverage of the first cell. within the coverage of the second cell but within the coverage of the first cell.
  • the first terminal device determines that the second terminal device is within the coverage of the second cell according to the identity of the cell within the coverage of the second terminal device during the discovery process.
  • the first terminal device receives the system information request message sent by the second terminal device.
  • the first terminal device further forwards the indication of the system information change of the second cell or the paging message to the second terminal device through the second interface.
  • system information includes system information or updated system information or part of the system information requested by the second terminal device.
  • a communication system comprising a first terminal device and a second terminal device, wherein the first terminal device is configured to perform the method described in any one of Supplementary Notes 26 to 38, and the second terminal device is configured to It is configured to perform the method described in any one of Supplements 1 to 25.
  • a terminal device the terminal device is configured to execute the method described in any one of Supplements 26 to 38, and the second terminal device is configured to execute the method described in any one of Supplements 1 to 25 .

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Abstract

本申请实施例提供了一种信息获取方法，信息发送方法、装置和***，该信息获取方法包括：所述第二终端设备与第一终端设备建立连接；所述第二终端设备通过第一接口和/或第二接口获取至少一个小区的***信息。

Description

信息获取方法，信息发送方法、装置和*** 技术领域
本申请涉及通信领域。
背景技术
在当前通信网络中，终端设备通过Uu接口接入到网络部分，当前在Uu接口，***信息(system information，SI)和寻呼消息(paging message)由网络(gNB)发送给终端设备(UE)。
***信息包括主信息块(MIB)和***信息块(SIB)。图1是***信息获取示意图，如图1所示，网络设备向终端设备发送MIB和SIB1，对于其他***信息，终端设备可以向网络设备侧发送***信息请求，并接收网络设备侧发送的终端设备请求的***信息，或者，也可以是网络设备主动向终端设备发送***信息。
寻呼消息主要包括5G核心网(5GC)发起的移动被叫数据的寻呼以及无线接入网(RAN)发起的RAN寻呼，寻呼无线资源控制空闲(RRC_IDLE)或非激活状态(RRC_INACTIVE)中的终端设备。图2是寻呼过程示意图，如图2所示，网络设备向终端设备发送寻呼消息。
应该注意，上面对技术背景的介绍只是为了方便对本申请的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本申请的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
在R17中已经开始研究边链路中继(Sidelink relay，SL relay)，图3中示出了边链路中继场景示意图，场景一中，远端终端设备(remote UE)不在基站或小区的覆盖范围内，中继终端设备(relay UE)在基站或小区的覆盖范围内，场景二中，远端终端设备和中继终端设备都在基站或小区的覆盖范围内，场景三中，远端终端设备和中继终端设备在不同基站或小区的覆盖范围内。其中，relay UE的Uu链路上使用NR(新无线)Uu，在relay UE和remote UE之间的PC5上使用NR边链路。
在上面的场景中，Remote UE可以选择或重选一个Relay UE并与Relay UE建立 PC5接口的连接，在Remote UE通过Relay UE与网络建立连接后，Relay UE的服务小区控制Remote UE的操作。在Remote UE判断是否能够选择或重选该Relay UE时，Remote UE需要判断是否能够驻留在该Relay UE的服务小区，或获得该Relay UE的服务小区的***信息中的配置信息，以便后续通过该Relay UE连接到该Relay UE的服务小区，因而Remote UE需要获得Relay UE的服务小区的***信息；另一方面，在Remote UE已经通过Relay UE与gNB进行通信的情况下，如果Relay UE的服务小区的***信息发生改变，Remote UE也需要获得Relay UE的服务小区的更新的***信息。此外，在Remote UE已经与Relay UE建立PC5的单播链路之后，如果核心网或gNB要寻呼Remote UE，则Remote UE需要接收该寻呼消息。
发明人发现，如果Remote UE也处于一个小区的覆盖范围内(in-coverage)时，在Remote UE和Relay UE建立连接后，Remote UE如何获取***信息，或者获取哪些***信息，或者Relay UE是否主动向Remote UE转发Relay UE的服务小区的***信息都是需要解决的问题。
为了解决上述问题的至少一种或其它类似问题，本申请实施例提供了一种信息获取方法，信息发送方法、装置和***。
根据本申请实施例的一方面，提供一种信息获取装置，配置于第二终端设备，其中，该装置包括：
第一连接建立单元，其与第一终端设备建立连接；
接收单元，其通过第一接口和/或第二接口获取至少一个小区的***信息。
根据本申请实施例的另一方面，提供一种信息发送装置，配置于第一终端设备，其中，该装置包括：
第二连接建立单元，其与第二终端设备建立连接；
发送单元，其转发或者不转发第二小区的***信息至所述第二终端设备。
根据本申请实施例的另一方面，提供一种通信***，包括前述一方面的第二终端设备和/或包括前述另一方面的第一终端设备。
本申请实施例的有益效果之一在于：第二终端设备通过第一接口和/或第二接口获取相应的小区的***信息，避免第二终端设备重复获取相同或不同小区的***信息以节省第二终端设备的耗电；或者，可以使得第二终端设备获取正确的***信息以便与网络侧的通信更加准确。
参照后文的说明和附图，详细公开了本申请的特定实施方式，指明了本申请的原理可以被采用的方式。应该理解，本申请的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本申请实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
所包括的附图用来提供对本申请实施例的进一步的理解，其构成了说明书的一部分，用于例示本申请的实施方式，并与文字描述一起来阐释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。在附图中：
图1是***信息获取方法的一个示意图；
图2是寻呼消息发送的一个示意图；
图3是Remote UE和Relay UE应用场景示意图；
图4是本申请实施例的信息获取方法的一个示意图；
图5是本申请实施例的信息发送方法的一个示意图；
图6是本申请实施例***信息获取示意图；
图7是本申请实施例第一小区和第二小区相同场景示意图；
图8至图10是本申请实施例***信息获取示意图；
图11是本申请实施例第一小区和第二小区不同场景示意图；
图12至图19是本申请实施例***信息获取示意图；
图20是本申请实施例的信息获取装置的一个示意图；
图21是本申请实施例的信息发送装置的一个示意图；
图22是本申请实施例的通信***的一个示意图；
图23是本申请实施例的终端设备的一个示意图；
图24是本申请实施例的网络设备的一个示意图。
具体实施方式
参照附图，通过下面的说明书，本申请的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本申请的特定实施方式，其表明了其中可以采用本申请的原则的部分实施方式，应了解的是，本申请不限于所描述的实施方式，相反，本申请包括落入所附权利要求的范围内的全部修改、变型以及等同物。
在本申请实施例中，术语“第一”、“第二”等用于对不同元素从称谓上进行区分，但并不表示这些元素的空间排列或时间顺序等，这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在，但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本申请实施例中，单数形式“一”、“该”等包括复数形式，应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义；此外术语“所述”应理解为既包括单数形式也包括复数形式，除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”，术语“基于”应理解为“至少部分基于……”，除非上下文另外明确指出，另外“***信息请求”和“***信息请求消息”的表述可以互换。
在本申请实施例中，术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络，例如新无线(NR，New Radio)、长期演进(LTE，Long Term Evolution)、增强的长期演进(LTE-A，LTE-Advanced)、宽带码分多址接入(WCDMA，Wideband Code Division Multiple Access)、高速报文接入(HSPA，High-Speed Packet Access)等等。
并且，通信***中设备之间的通信可以根据任意阶段的通信协议进行，例如可以包括但不限于如下通信协议：1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及未来的5G、6G等等，和/或其他目前已知或未来将被开发的通信协议。
在本申请实施例中，术语“网络设备”例如是指通信***中将终端设备接入通信网络并为该终端设备提供服务的设备。网络设备可以包括但不限于如下设备：基站 (BS，Base Station)、接入点(AP、Access Point)、发送接收点(TRP，Transmission Reception Point)、广播发射机、移动管理实体(MME、Mobile Management Entity)、网关、服务器、无线网络控制器(RNC，Radio Network Controller)、基站控制器(BSC，Base Station Controller)等等。
其中，基站可以包括但不限于：节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB)，等等，此外还可包括远端无线头(RRH，Remote Radio Head)、远端无线单元(RRU，Remote Radio Unit)、中继(relay)或者低功率节点(例如femto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能，每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域，这取决于使用该术语的上下文。
在本申请实施例中，术语“用户设备”(UE，User Equipment)例如是指通过网络设备接入通信网络并接收网络服务的设备，也可以称为“终端设备”(TE，Terminal Equipment)。终端设备可以是固定的或移动的，并且也可以称为移动台(MS，Mobile Station)、终端、用户、用户台(SS，Subscriber Station)、接入终端(AT，Access Terminal)、站，等等。
其中，终端设备可以包括但不限于如下设备：蜂窝电话(Cellular Phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、数字相机，等等。
再例如，在物联网(IoT，Internet of Things)等场景下，终端设备还可以是进行监控或测量的机器或装置，例如可以包括但不限于：机器类通信(MTC，Machine Type Communication)终端、车载通信终端、设备到设备(D2D，Device to Device)终端、机器到机器(M2M，Machine to Machine)终端，等等。
在本申请实施例中，Relay UE表示可以与网络设备直接通信的可以进行中继的终端设备(UE-to-Network Relay UE)，Remote UE表示需要经由Relay UE中继才能与网络设备进行通信的终端设备。
目前，3rd Generation Partnership Project(3GPP)标准化组织在会议中同意了，Remote UE的小区选择/重选过程(通过Uu接口)与Relay UE的选择/重选过程是独立进行的。对层2终端设备-网络设备中继(L2UE-to-Network relay)，在Remote UE 通过Relay UE连接网络之后(连接态)，Relay UE和Remote UE由Relay UE的服务小区控制。
此外，在Relay的发现(discovery)或选择/重选(selection/reselection)过程中，Relay UE会通知自己所在的服务小区的cell ID给Remote UE，用于Remote UE选择/重选Relay UE。
在本申请下面的描述中，Remote UE可能处无线资源控制空闲(RRC_IDLE)或非激活状态(RRC_INACTIVE)或激活状态(RRC_CONNECTED)；Relay UE也可能处于RRC_IDLE或RRC_INACTIVE或RRC_CONNECTED状态，本申请实施例并不以此作为限制。
下面结合附图对本申请的各种实施方式进行说明。这些实施方式只是示例性的，不是对本申请的限制。
第一方面的实施例
本申请实施例提供一种信息获取方法和信息发送方法，分别应用于第一终端设备以及第二终端设备。
在一些实施方式中，该第一终端设备可以是Relay UE，该第二终端设备可以是Remote UE，其中，Relay UE为Remote UE提供到网络的上行和/或下行的中继传输。
图4是该信息获取方法示意图，如图4所示，该方法应用于第二终端设备，包括：
401，第二终端设备与第一终端设备建立连接；
402，该第二终端设备通过第一接口和/或第二接口获取至少一个小区的***信息。
由此，第二终端设备通过第一接口和/或第二接口获取相应的小区的***信息，避免第二终端设备重复获取相同或不同小区的***信息以节省第二终端设备的耗电；或者，可以使得第二终端设备获取正确的***信息以便与网络侧的通信更加准确。
在一些实施方式中，在401中，第二终端设备可以通过执行中继发现、中继选择或中继重选、PC5单播链路(PC5 unicast link)建立等过程与第一终端设备建立连接，该连接是边链路连接，例如PC5-RRC连接或PC5-AS(Access Stratum，接入层)连接或PC5单播链路(PC5 unicast link)，关于该中继发现、中继选择或中继重选、PC5单播链路建立的过程可以参考现有技术，此处不再赘述。
在一些实施例中，在401中，该建立连接可以包括第二终端设备与第一终端设备 正在执行建立连接的过程，但连接尚未成功建立，例如第二终端设备正在进行中继发现或选择(重选)等，或者说尚未完成连接建立，例如第二终端设备与第一终端设备正在交互连接建立的相关消息等，或者也可以包括第二终端设备与第一终端设备已经成功建立了连接，本申请并不以此作为限制。
在一些实施方式中，该第一接口是蜂窝接口，例如Uu接口；该第二接口是边链路接口，例如PC5接口；可选的，该第一接口也可以是其他蜂窝接口，该第二接口也可以是其他边链路接口，本申请对此不进行限定。
在一些实施方式中，该***信息可以包括MIB和SIB1，或者也可以包括除MIB和SIB1外的其他***信息，该***信息是由网络设备侧进行周期性广播的或者根据该第一终端设备和/或第二终端设备的***信息请求而广播的或者根据第一终端设备和/或第二终端设备的***信息请求通过专用无线资源控制RRC消息发送的。
在一些实施例中，该***信息可以包括***信息或者是更新后的***信息(全部的)，或者该***信息可以仅包括第二终端设备请求的部分***信息(例如，第二终端设备可以发送按需(on-demand)***信息请求该部分***信息，关于如何请求将在后述进行说明)，本申请实施例并不以此作为限制。
在一些实施例中，以上附图4仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其它的一些操作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图4的记载，例如401可以在402前执行，也可以同时进行等。
在一些实施方式中，在402中，该第二终端设备通过第一接口和/或第二接口获取至少一个小区的***信息包括：
该第二终端设备通过第一接口获取第一小区的***信息，或者，
该第二终端设备通过第二接口获取第二小区的***信息，或者，
该第二终端设备通过第一接口获取第一小区的***信息，通过第二接口获取第二小区的***信息。
在一些实施例中，该第二终端设备处于第一小区的覆盖范围内(in-coverage)，该第一小区也可以被称为该第二终端的服务小区或该第二终端驻留的小区或该第二终端小区选择或重选的小区等，第二终端设备与第一终端设备建立连接，该第一终端设备的服务小区是第二小区，第二小区与第一小区可以是相同的或也可以是不同的。
以图3为例，如场景二所示，其中，第一小区与第二小区相同；如场景三所示，其中，第一小区与第二小区是不同的。
(一)该第二终端设备通过第一接口获取第一小区的***信息
在一些实施例中，在第一小区和第二小区相同时，即存在一个小区的***信息，该第二终端设备需要获取一个小区的***信息，该第二终端设备通过第一接口获取该第一小区的***信息，而不需要通过第二接口获取***信息；或者，在第一小区和第二小区不相同时，即存在第一小区的***信息和第二小区的***信息，该第二终端设备通过第一接口获取该第一小区的***信息，不接收(第一终端设备)通过第二接口发送的***信息，或者说不经由第二接口获取***信息。
(二)该第二终端设备通过第二接口获取第二小区的***信息
在一些实施例中，在第一小区和第二小区相同时，即存在一个小区的***信息，该第二终端设备通过第二接口获取该第二小区(或者说第一小区)的***信息；或者，在第一小区和第二小区不相同时，即存在第一小区的***信息和第二小区的***信息，该第二终端设备通过第二接口获取该第二小区的***信息，不接收通过第一接口发送的***信息，或者说不经由第一接口获取***信息。
或者，在一些实施例中，第二终端设备不需要考虑第二小区和第一小区是否相同，仅通过第二接口获取第二小区的***信息，而不接收通过第一接口发送的***信息，或者说不经由第一接口获取***信息。
(三)该第二终端设备通过第一接口获取第一小区的***信息，通过第二接口获取第二小区的***信息
在一些实施例中，在第一小区和第二小区不同时，即存在第一小区的***信息和第二小区的***信息，该第二终端设备通过第一接口获取第一小区的***信息，通过第二接口获取第二小区的***信息，可选的，在获取到两个小区的***信息后，还可以不使用或丢弃其中一个小区的***信息。
在一些实施例中，与第二终端设备侧对应的，第一终端设备可以转发或者不转发第二小区的***信息至该第二终端设备。
图5是该信息发送方法的一示意图，如图5所示，该方法应用于第一终端设备，包括：
501，第一终端设备与第二终端设备建立连接；
502，该第一终端设备转发或者不转发第二小区的***信息至该第二终端设备。
由此，第一终端设备能够将正确的***信息转发或不转发至第二终端设备，使得第二终端设备能够获取正确的***信息，以便与网络侧的通信更加准确。
在一些实施例中，第一终端设备可以主动转发该第二小区的***信息，或者在接收到第二终端设备发送的***信息请求时转发该第二小区的***信息，或者在未接收到第二终端设备发送的***信息请求时，不主动转发第二小区的***信息。具体将在后述实施例进行详细说明。
以下结合第二方面至第四方面的实施例分别对402、502进行说明。
第二方面的实施例
本申请实施例提供一种信息获取方法和信息发送方法，应用于第一终端设备以及第二终端设备。与第一方面的实施例相同的技术方案，具体请参考第一方面的实施例，此处不再赘述。
在一些实施例中，在满足第一条件时，第二终端设备通过第二接口获取第二小区的***信息，可选的，不接收通过第一接口发送的***信息，或者说不经由第一接口获取***信息，或者说无需接收通过第一接口发送的***信息。
在一些实施例中，该第一条件包括以下条件至少一种：
该第二终端设备判断该第二小区是否允许该第二终端设备接入时；和/或
该第二终端设备判断是否选择/重选该第一终端设备作为中继时；和/或
该第二终端设备通过该第一终端设备与该第二小区建立RRC连接过程中；和/或
在该第二终端设备通过该第一终端设备进入连接态后。
在一些实施例中，第二终端设备判断第二小区是否允许所述第二终端设备接入时，和/或判断是否选择/重选该第一终端设备作为中继时，仅需要依据第二小区的***信息，因此，无需考虑第一小区和第二小区是否相同，第二终端设备(仅)接收第一终端设备通过第二接口转发的第二小区的***信息。
在一些实施例中，该第二终端设备通过该第一终端设备与该第二小区建立RRC连接过程中；和/或在该第二终端设备通过该第一终端设备进入连接态后，也无需考虑第一小区和第二小区是否相同，第二终端设备(仅)接收第一终端设备通过第二接 口转发的第二小区的***信息。
在一些实施例中，第二终端设备可以向第一终端设备发送***信息请求，第一终端设备在接收到该***信息请求时，通过第二接口转发第二小区的***信息至该第二终端设备，例如，该***信息请求可以是按需***信息请求(on-demand SI request)，该按需***信息请求(on-demand SI request)包括请求的部分***信息的类型，但本申请实施例并不以此作为限制，在该***信息请求是按需***信息请求(on-demand SI request)时，该转发的***信息可以是请求的部分***信息。
在一些实施例中，在第二终端设备未向第一终端设备发送***信息请求时，第一终端设备不(主动)转发第二小区的***信息至该第二终端设备。
图6是该***信息获取方法示意图，如图6所示，第二小区的网络设备向第一终端设备发送***信息，在满足第一条件时，第二终端设备可以向第一终端设备发送***信息请求，第一终端设备在收到该***信息请求后，将该***信息转发至第二终端设备。此外(未图示)，第一终端设备在收到第二终端设备请求的***信息时，如果没有存储(获取过)该请求的***信息，第一终端设备可以转发第二终端设备的***信息请求至第二小区网络设备，以使网络设备发送第二终端设备请求的***信息，在第一终端设备收到该***信息后，第一终端设备将该***信息转发至第二终端设备。
由此，第二终端设备通过第二接口获取相应的小区的***信息，避免第二终端设备重复获取***信息以节省第二终端设备的耗电；可以使得第二终端设备获取正确的***信息以便与网络侧的通信更加准确。
在第二方面的实施例中，第二终端设备无需考虑第一小区和第二小区是否相同，通过第二接口获取第二小区的***信息，但本申请实施例并不以此作为限制。例如，第二终端设备在第一小区和第二小区相同或不同时，采取不同的方式获取***信息，以下分别结合第三和第四方面的实施例进行说明。
第三方面的实施例
由于第一小区和第二小区相同，因此，仅存在一个小区的***信息(第一小区的***信息或者说第二小区的***信息)，第二终端设备可以通过第一接口获取该***信息和/或可以通过第二接口获取该***信息。图7是第一小区和第二小区相同的场 景，以下结合附图7进行说明。
在一些实施例中，第二终端设备通过第一接口获取第一小区(也即第二小区)的***信息，不需要通过第二接口获取该第一小区(也即第二小区)的***信息，或者说不需要向第一终端设备请求该第一小区(也即第二小区)的***信息。
在一些实施例中，如果网络设备已经广播了***信息，该第二终端设备可以通过第一接口(Uu接口)直接获取网络设备广播的***信息；如果网络设备还没有广播***信息，该第二终端设备可以通过发送***信息请求(例如，按需***信息请求(on-demand SI request))的方式，请求网络设备发送请求的***信息，网络设备可以通过广播或通过专用RRC消息发送该请求的***信息。具体实施方式与上述第二方面的实施例类似，在此不做重复说明。
在一些实施例中，对于***信息更新的情况。例如，该第二终端设备在该第一接口监听寻呼的的短消息(Short Message)或通过该第二接口接收该第一终端设备发送的***信息改变指示信息，以此确定第一小区中是否有***信息更新。
例如，该Short Message可以在使用寻呼无线网络临时标识(P-RNTI)的物理下行控制信道(Physical Downlink Control Channel，PDCCH)中被发送，使用下行控制信息(Downlink Control Information，DCI)格式1_0中的Short Message域发送。该Short Message的格式如下，Bit 1是最高位比特。
Figure PCTCN2021124651-appb-000001
例如，该***信息改变指示信息可以在PC5-RRC消息中被发送，由第一终端设备发送给第二终端设备，***信息改变指示信息可以包含1比特，应用于除了SIB6、SIB7和SIB8之外的***信息修改，也可以显式地指示哪个***信息块(SIB)或***信息消息(SI message)发生改变，例如通过比特位图bitmap对应每个SIB或SI message，其中一个SIB或SI message对应的bit为1指示该SIB或SI message发生改变，反之亦可，本申请并不以此作为限制，或者还可以指示改变的SIB的type或SI message的索引等，也可以显式地指示地震和海啸预警***(Earthquake and Tsunami Warning System，ETWS)和商用移动警报***(Commercial Mobile Alert System， CMAS)是否出现通知信息等。
在有下行数据发送时，第一小区的网络设备需要向第二终端设备发送寻呼消息，例如，该第二终端设备通过该第二接口接收该第一终端设备转发的寻呼消息，或者从该第一接口接收寻呼消息，该第二终端设备是处于空闲或非激活状态的终端设备。
在上述实施例中，由于第二终端设备不需要通过第二接口获取该第一小区(也即第二小区)的***信息，或者说不需要向第一终端设备请求该第一小区(也即第二小区)的***信息，因此，在满足第五条件时，第一终端设备也不需要(主动)转发第一小区(也就是第二小区)的***信息至第二终端设备，该第五条件为第二终端设备处于第二小区的覆盖内，或者说第一小区和第二小区相同。
例如，第一终端设备根据发现过程中第二终端设备的处于覆盖内的小区的标识，确定该第二终端设备处于第二小区的覆盖内，即第一终端设备和第二终端设备在建立连接过程中(例如发现过程或选择(重选)过程)，第一终端设备获取第二终端设备的第一小区的标识，例如第二终端设备可以将第一小区的信息通知给第一终端设备，在第一终端设备确定第一小区的标识和第二小区的标识相同时，确定该第二终端设备处于该第二小区的覆盖内，第一终端设备不需要(主动)转发第一小区(也就是第二小区)的***信息至第二终端设备。其中，小区的标识可以是小区标识(cell Identity)或小区全球标识信息(例如包括PLMN Identity和cell Identity等)或物理小区标识(Physical Cell Identifier，PCI)和/或频率信息(例如SSB所在的频率)等。
在上述实施例中，虽然第一终端设备不需要(主动)转发第一小区(也就是第二小区)的***信息至第二终端设备，但第一终端设备可以经由第二接口向第二终端设备发送***信息改变的指示或寻呼消息，具体如前所述，此处不再赘述。
图8是该***信息获取方法示意图，如图8所示，第一终端设备和第二终端设备建立连接过程，第一终端设备获取第一小区的标识，确定第一小区的标识和第二小区的标识相同，第一终端设备不(主动)转发第一小区(也就是第二小区)的***信息至第二终端设备，第一终端设备和第二终端设备可以经过第一接口获取第一小区(也就是第二小区)的网络设备(广播)的***信息。
在一些实施例中，第二终端设备通过第二接口获取第二小区(也即第一小区)的***信息；例如，在满足第二条件时，第二终端设备通过第二接口获取第二小区(也即第一小区)的***信息，该第二条件包括：第二小区的***信息更新，也就是说， 在第二小区(也即第一小区)的***信息更新时，第二终端设备通过第二接口获取第二小区(也即第一小区)的***信息。
例如，第二终端设备无需向第一终端设备发送***信息请求，可以通过第二接口获取第一终端设备主动转发的***信息，或者，也可以向第一终端设备发送***信息请求(例如，定期发送按需***信息请求)，通过第二接口获取第一终端设备转发的***信息。
在上述实施例中，在满足第四条件时，第一终端设备可以通过第二接口(主动)转发更新的***信息至第二终端设备，该第四条件包括：第二小区的***信息更新，也就是说，在第二小区(也即第一小区)的***信息更新时，第二终端设备无需发送***信息请求，第一终端设备通过第二接口主动转发更新后的***信息至第二终端设备。
图9是该***信息获取方法示意图，如图9所示，在第二小区的***信息更新时，第一终端设备可以通过第二接口(主动)转发更新的***信息至第二终端设备，第二终端设备无需发送***信息请求，可以直接通过第二接口获取第一终端设备转发的第二小区(也即第一小区)的***信息。其中，第一终端设备可以转发全部***信息或全部更新的***信息或者第二终端设备之前曾经请求过的***信息。
或者，在上述实施例中，第二终端设备也可以发送***信息请求，第一终端设备不主动转发更新后的***信息，而是在接收到***信息请求后，通过第二接口转发更新后的***信息至第二终端设备，例如，该第二终端设备可以定期(周期性的)向第一终端设备发送按需***信息请求，以获取更新的***信息。例如，在满足第四条件时，第一终端设备可以通过第二接口转发***信息至第二终端设备，该第四条件包括：该第一终端设备接收到第二终端设备发送的***信息请求。
图10是该***信息获取方法示意图，如图10所示，该第二终端设备可以定期(周期性的)向第一终端设备发送(按需)***信息请求，第一终端设备在接收到该***信息请求后，可以通过第二接口转发更新的***信息至第二终端设备。
通过本申请上述实施例，可以避免第二终端设备重复获取***信息以节省第二终端设备的耗电。
第四方面的实施例
由于第一小区和第二小区不同，因此，存在两个小区的***信息(第一小区的***信息和第二小区的***信息)，第二终端设备可以获取一个小区的***信息，也可以获取两个小区的***信息并保留，也可以获取两个小区的***信息，丢弃或不使用其中一个小区的***信息，图11是第一小区和第二小区不相同的场景，以下结合附图11进行说明。
I.获取一个小区的***信息
在一些实施例中，第二终端设备通过第一接口获取第一小区的***信息，不接收第一终端设备通过第二接口转发的第二小区的***信息。在上述实施例中，第一终端设备可以不(主动)向第二终端设备转发该***信息。例如，在满足第五条件时，第一终端设备不(主动)向第二终端设备转发该***信息，该第五条件包括：该第二终端设备处于该第一小区的覆盖内。
在一些实施例中，如果网络设备已经广播了***信息，该第二终端设备可以通过第一接口(Uu接口)直接获取网络设备广播的***信息；如果网络设备还没有广播***信息，该第二终端设备可以通过发送***信息请求(例如，按需***信息请求(on-demand SI request))的方式，请求网络设备发送请求的***信息，网络可以通过广播或通过专用RRC消息发送该***信息。具体实施方式与上述第二方面的实施例类似，在此不做重复说明。
图12是该***信息获取方法示意图，如图12所示，第二小区的网络设备向第一终端设备发送***信息，但第一终端设备不主动转发该第二小区的***信息至第二终端设备，第一小区的网络设备向第二终端设备发送***信息，第二终端设备通过第一接口获取该第一小区的***信息。
在一些实施例中，第二终端设备接收第一终端设备通过第二接口转发的第二小区的***信息，不通过第一接口接收第一小区的***信息。
例如，在满足第三条件时，第二终端设备仅接收第一终端设备通过第二接口转发的第二小区的***信息，不通过第一接口接收第一小区的***信息。该第三条件包括以下条件至少之一：
该第二终端设备已经选择或重选了第一终端设备，不再执行小区选择或重选；
该第二终端设备从连接态被释放到空闲或非激活状态；
该第二终端设备判断该第二小区是否允许该第二终端设备接入时；
该第二终端设备通过该第一终端设备与该第二小区建立RRC连接过程中；
在该第二终端设备通过该第一终端设备进入连接态后。
例如，在该第二终端设备已经选择或重选了第一终端设备，不再执行小区选择或重选；或该第二终端设备从连接态被释放到空闲或非激活状态；或该第二终端设备判断该第二小区是否允许该第二终端设备接入时，不需要考虑第一小区的***信息，仅需要依据第二小区的***信息，因此，第二终端设备仅接收第一终端设备通过第二接口转发的第二小区的***信息，不通过第一接口接收第一小区的***信息。
例如，在该第二终端设备通过该第一终端设备与该第二小区建立RRC连接过程中，或在该第二终端设备通过该第一终端设备进入连接态后，也不需要考虑第一小区的***信息，仅需要第二小区的***信息，因此，第二终端设备仅接收第一终端设备通过第二接口转发的第二小区的***信息，不通过第一接口接收第一小区的***信息。
在上述实施例中，第二终端设备无需向第一终端设备发送***信息请求，可以通过第二接口获取第一终端设备主动转发的***信息，或者，也可以向第一终端设备发送***信息请求(例如，按需***信息请求)，通过第二接口获取第一终端设备转发的***信息。
例如，在满足第四条件时，第一终端设备可以通过第二接口(主动)转发***信息至第二终端设备，该第四条件包括：该第一终端设备与该第二终端设备建立连接后，也就是说，该第一终端设备与该第二终端设备建立连接后，第二终端设备无需发送***信息请求，第一终端设备通过第二接口主动转发更新后的***信息至第二终端设备，或者，该第四条件可以包括：该第一终端设备与该第二终端设备未完成连接建立，但在该情况下，***信息可以由发现消息或PC5链路建立相关的消息(例如direct communication request和/或direct communication accept)承载，也就是说，该第一终端设备与该第二终端设备未成功建立连接时，第二终端设备无需发送***信息请求，第一终端设备通过第二接口主动转发***信息至第二终端设备，该***信息由发现消息或PC5链路建立相关的消息承载。
图13是该***信息获取方法示意图，如图13所示，第一终端设备可以通过第二接口(主动)转发第二小区的***信息至第二终端设备，第二终端设备无需发送***信息请求，可以直接通过第二接口获取第一终端设备转发的第二小区(也即第一小区)的***信息，另外不通过第一接口接收第一小区的***信息。
或者，在上述实施例中，第二终端设备也可以发送***信息请求(例如按需***信息请求)，第一终端设备不主动转发第二小区的***信息，而是在接收到***信息请求后，通过第二接口转发第二小区的***信息至第二终端设备。
例如，在满足第四条件时，第一终端设备可以通过第二接口转发***信息至第二终端设备，该第四条件包括：该第一终端设备接收到第二终端设备发送的***信息请求。
图14是该***信息获取方法示意图，如图14所示，该第二终端设备可以向第一终端设备发送(按需)***信息请求，第一终端设备在接收到该***信息请求后，可以通过第二接口转发第二小区的***信息至第二终端设备，另外不通过第一接口接收第一小区的***信息。
II.获取两个小区的***信息并保留
在一些实施例中，第二终端设备通过第一接口获取第一小区的***信息，以及，在满足第一条件时，该第二终端设备接收该第一终端设备通过该第二接口转发的***信息。
在一些实施例中，该第一条件包括以下条件至少一种：
该第二终端设备判断该第二小区是否允许该第二终端设备接入时；和/或
该第二终端设备判断是否选择/重选该第一终端设备作为中继时；和/或
该第二终端设备通过该第一终端设备与该第二小区建立RRC连接过程中；和/或
在该第二终端设备通过该第一终端设备进入连接态后。
在一些实施例中，第二终端设备判断第二小区是否允许该第二终端设备接入时，和/或判断是否选择/重选该第一终端设备作为中继时，需要依据第二小区的***信息，因此，第二终端设备接收第一终端设备通过第二接口转发的第二小区的***信息。
在一些实施例中，该第二终端设备通过该第一终端设备与该第二小区建立RRC连接过程中；和/或在该第二终端设备通过该第一终端设备进入连接态后，第二终端设备接收第一终端设备通过第二接口转发的第二小区的***信息。
在上述实施例中，第二终端设备无需向第一终端设备发送***信息请求，可以通过第二接口获取第一终端设备主动转发的***信息，或者，也可以向第一终端设备发 送***信息请求(例如，按需***信息请求)，通过第二接口获取第一终端设备转发的***信息。
例如，在满足第四条件时，第一终端设备可以通过第二接口(主动)转发***信息至第二终端设备，该第四条件包括：该第一终端设备与该第二终端设备建立连接后，也就是说，该第一终端设备与该第二终端设备建立连接后，第二终端设备无需发送***信息请求，第一终端设备通过第二接口主动转发更新后的***信息至第二终端设备，或者，该第四条件可以包括：该第一终端设备与该第二终端设备未完成连接建立，但在该情况下，***信息可以由发现消息或PC5链路建立相关的消息(例如direct communication request和/或direct communication accept)承载，也就是说，该第一终端设备与该第二终端设备未成功建立连接时，第二终端设备无需发送***信息请求，第一终端设备通过第二接口主动转发***信息至第二终端设备，该***信息由发现消息或PC5连接建立相关的消息承载。
图15是该***信息获取方法示意图，如图15所示，第一终端设备可以通过第二接口(主动)转发第二小区的***信息至第二终端设备，第二终端设备无需发送***信息请求，可以直接通过第二接口获取第一终端设备转发的第二小区(也即第一小区)的***信息，另外通过第一接口接收第一小区的***信息。
或者，在上述实施例中，第二终端设备也可以发送***信息请求(例如按需***信息请求)，第一终端设备不主动转发第二小区的***信息，而是在接收到***信息请求后，通过第二接口转发第二小区的***信息至第二终端设备。
例如，在满足第四条件时，第一终端设备可以通过第二接口转发***信息至第二终端设备，该第四条件包括：该第一终端设备接收到第二终端设备发送的***信息请求。
图16是该***信息获取方法示意图，如图16所示，该第二终端设备可以向第一终端设备发送(按需)***信息请求，第一终端设备在接收到该***信息请求后，可以通过第二接口转发第二小区的***信息至第二终端设备，另外通过第一接口接收第一小区的***信息。
以下说明第二终端设备在获取两个小区的***信息后如何使用上述***信息。
在一些实施例中，在满足上述第一条件时，该第二终端设备使用第二小区的***信息。
在一些实施例中，该第二终端设备使用通过该第一接口获取该第一小区的***信息进行小区选择或小区重选，该第二终端设备处于空闲或非激活状态。
在一些实施例中，第二终端设备在获取了第一小区的***信息和第二小区的***信息后，可以存储第一小区和第二小区的***信息。
III.获取两个小区的***信息，丢弃或不使用其中一个小区的***信息
在一些实施例中，第二终端设备通过第一接口获取第一小区的***信息，通过第二接口获取第一终端设备转发的第二小区的***信息，但可以不使用或丢弃该第二小区的***信息。在上述实施例中，该第二终端设备处于该第一小区的覆盖内，第一终端设备可以不(主动)向第二终端设备转发第二小区的该***信息，包括第二终端设备可以向第一终端设备发送***信息请求，该第一终端设备在接收到该***信息请求时，向第二终端设备转发该第二小区的***信息。该第一终端设备在未接收到该***信息请求时，不向第二终端设备转发该第二小区的***信息。
在一些实施例中，如果网络设备已经广播了***信息，该第二终端设备可以通过第一接口(Uu接口)直接获取网络设备广播的***信息；如果网络设备还没有广播***信息，该第二终端设备可以通过发送***信息请求(例如，按需***信息请求(on-demand SI request))的方式，请求网络设备发送请求的***信息，网络设备可以通过广播或通过专用RRC消息发送该请求的***信息。具体实施方式与上述第二方面的实施例类似，在此不做重复说明。
图17是该***信息获取方法示意图，如图17所示，第二小区的网络设备向第一终端设备发送***信息，但第一终端设备不主动转发该第二小区的***信息至第二终端设备，第一小区的网络设备向第二终端设备发送***信息，第二终端设备通过第一接口获取该第一小区的***信息。第二终端设备向第一终端设备发送***信息请求，第一终端设备向第二终端设备转发该第二小区的***信息，该第二终端设备不使用或丢弃该第二小区的***信息。
在一些实施例中，第二终端设备接收第一终端设备通过第二接口转发的第二小区的***信息，还通过第一接口接收第一小区的***信息，但可以不使用或丢弃该第一小区的***信息。
例如，在满足第三条件时，第二终端设备接收第一终端设备通过第二接口转发的 第二小区的***信息，另外，通过第一接口接收第一小区的***信息。该第三条件是以下条件至少之一：
该第二终端设备已经选择或重选了第一终端设备，不再执行小区选择或重选；
该第二终端设备从连接态被释放到空闲或非激活状态；
该第二终端设备判断该第二小区是否允许该第二终端设备接入时；
该第二终端设备通过该第一终端设备与该第二小区建立RRC连接过程中；
在该第二终端设备通过该第一终端设备进入连接态后。
例如，在该第二终端设备已经选择或重选了第一终端设备，不再执行小区选择或重选；或该第二终端设备从连接态被释放到空闲或非激活状态；或该第二终端设备判断该第二小区是否允许该第二终端设备接入时，不需要考虑第一小区的***信息，仅需要依据第二小区的***信息，因此，第二终端设备接收第一终端设备通过第二接口转发的第二小区的***信息，另外，通过第一接口接收第一小区的***信息，但可以不使用或丢弃该第一小区的***信息。
例如，在该第二终端设备通过该第一终端设备与该第二小区建立RRC连接过程中，或在该第二终端设备通过该第一终端设备进入连接态后，也不需要考虑第一小区的***信息，仅需要第二小区的***信息，因此，第二终端设备仅接收第一终端设备通过第二接口转发的第二小区的***信息，另外，通过第一接口接收第一小区的***信息，但可以不使用或丢弃该第一小区的***信息。
在上述实施例中，第二终端设备无需向第一终端设备发送***信息请求，可以通过第二接口获取第一终端设备主动转发的***信息，或者，也可以向第一终端设备发送***信息请求(例如，按需***信息请求)，通过第二接口获取第一终端设备转发的***信息。
例如，在满足第四条件时，第一终端设备可以通过第二接口(主动)转发***信息至第二终端设备，该第四条件包括：该第一终端设备与该第二终端设备建立连接后，也就是说，该第一终端设备与该第二终端设备建立连接后，第二终端设备无需发送***信息请求，第一终端设备通过第二接口主动转发更新后的***信息至第二终端设备，或者，该第四条件可以包括：该第一终端设备与该第二终端设备未完成连接建立，但在该情况下，***信息可以由发现消息或PC5单播链路建立相关的消息承载，也就是说，该第一终端设备与该第二终端设备未成功建立连接时，第二终端设备无需发送 ***信息请求，第一终端设备通过第二接口主动转发***信息至第二终端设备，该***信息由发现消息承载。
图18是该***信息获取方法示意图，如图18所示，第一终端设备可以通过第二接口(主动)转发第二小区的***信息至第二终端设备，第二终端设备无需发送***信息请求，可以直接通过第二接口获取第一终端设备转发的第二小区(也即第一小区)的***信息，另外通过第一接口接收第一小区的***信息，但丢弃或不使用该第一小区的***信息。
或者，在上述实施例中，第二终端设备也可以发送***信息请求(例如按需***信息请求)，第一终端设备不主动转发第二小区的***信息，而是在接收到***信息请求后，通过第二接口转发第二小区的***信息至第二终端设备。
例如，在满足第四条件时，第一终端设备可以通过第二接口转发***信息至第二终端设备，该第四条件包括：该第一终端设备接收到第二终端设备发送的***信息请求。
图19是该***信息获取方法示意图，如图19所示，该第二终端设备可以向第一终端设备发送(按需)***信息请求，第一终端设备在接收到该***信息请求后，可以通过第二接口转发第二小区的***信息至第二终端设备，另外通过第一接口接收第一小区的***信息，但丢弃或不使用该第一小区的***信息。
由此，可以使得第二终端设备获取正确的***信息以便与网络侧的通信更加准确。
值得注意的是，以上附图6-附图19仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其它的一些操作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图6-附图19的记载。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
第五方面的实施例
本申请实施例提供一种信息获取装置，配置于第二终端设备。
图20是本申请实施例的信息获取装置的一个示意图，本申请实施例从第二终端设备的一侧进行说明。其中，本申请实施例的信息获取装置的实施原理与第一方面至第四方面的实施例的实施类似，内容相同之处不再重复说明。
如图20所示，本申请实施例的信息获取装置2000包括：
第一连接建立单元2001，其与第一终端设备建立连接；
接收单元2002，其通过第一接口和/或第二接口获取至少一个小区的***信息。
在一些实施例中，接收单元2002通过第一接口和/或第二接口获取至少一个小区的***信息包括：
接收单元2002通过第一接口获取第一小区的***信息，或者，
接收单元2002通过第二接口获取第二小区的***信息，或者，
接收单元2002通过第一接口获取第一小区的***信息，通过第二接口获取第二小区的***信息。
在一些实施例中，在接收单元2002通过第一接口获取第一小区的***信息时，接收单元2002不接收第一终端设备通过该第二接口转发的第二小区的***信息。
在一些实施例中，第一小区是第二终端设备的处于覆盖内的小区；第二小区是第一终端设备的服务小区；并且，该第二小区与该第一小区相同或不同。
在一些实施例中，在接收单元2002通过第一接口获取第一小区的***信息时，接收单元2002在第一接口监听寻呼的短消息(Short Message)或通过第二接口接收第一终端设备发送的***信息改变指示信息。
在一些实施例中，在接收单元2002通过第一接口获取第一小区的***信息时，接收单元2002通过第二接口接收第一终端设备转发的寻呼消息，或者从第一接口接收寻呼消息。其中，该第二终端设备处于空闲或非激活状态。
在一些实施例中，接收单元2002通过第二接口获取第二小区的***信息包括：
接收单元2002接收第一终端设备通过第二接口转发的第二小区的***信息。
在一些实施例中，接收单元2002通过第二接口获取第二小区的***信息包括：
在接收单元2002通过第二接口获取第二小区的***信息时，接收单元2002不通过第一接口获取第一小区的***信息。
在一些实施例中，在满足第一条件和/或第二条件时，接收单元2002通过第二接口获取第二小区的***信息。
在一些实施例中，该装置还可以包括：(可选，未图示)
发送单元，该发送单元向第一终端设备发送***信息请求消息。
在一些实施例中，该发送单元的定期向该第一终端设备发送***信息请求消息。
在一些实施例中，接收单元2002通过第一接口获取第一小区的***信息，通过第二接口获取第二小区的***信息包括：
接收单元2002通过第一接口获取第一小区的***信息，以及，
在满足第一条件时，接收单元2002接收第一终端设备通过第二接口转发的***信息；或者在第一终端设备与第二终端设备建立连接时，接收单元2002接收第一终端设备通过第二接口转发的***信息；或者在第一终端设备与第二终端设备未完成连接建立时，接收单元2002接收第一终端设备通过第二接口转发的***信息，该***信息由发现消息或PC5连接建立相关的消息承载。
在一些实施例中，该装置还可以包括：(可选，未图示)
选择单元，该选择单元使用通过该第一接口获取该第一小区的***信息进行小区选择或小区重选；其中，第二终端设备处于空闲或非激活状态。
在一些实施例中，第二终端设备丢弃或不使用通过第一接口获取的第一小区的***信息或通过第二接口获取的第二小区的***信息。
在一些实施例中，在满足第三条件时，第二终端设备丢弃或不使用通过第一接口获取的第一小区的***信息，
其中，该第三条件包括以下条件至少之一：
第二终端设备已经选择或重选了第一终端设备，不再执行小区选择或重选；
第二终端设备从连接态被释放到空闲或非激活状态；
第二终端设备判断第二小区是否允许第二终端设备接入时；
第二终端设备通过第一终端设备与第二小区建立RRC连接过程中；
在第二终端设备通过第一终端设备进入连接态后。
在一些实施例中，该第一条件包括以下条件至少一种：
第二终端设备判断第二小区是否允许第二终端设备接入时；和/或
第二终端设备判断是否选择/重选第一终端设备作为中继时；和/或
第二终端设备通过第一终端设备与第二小区建立RRC连接过程中；和/或
在第二终端设备通过第一终端设备进入连接态后。
在一些实施例中，该第二条件包括：第二小区的***信息更新。
在一些实施例中，该***信息包括***信息或更新后的***信息或第二终端设备请求的部分***信息。
在一些实施例中，该第一接口是蜂窝接口；该第二接口是边链路接口。
上述各个单元模块的实施方式可以参考第一至第四方面的实施例，重复之处不再赘述。
值得注意的是，以上仅对与本申请相关的各部件或模块进行了说明，但本申请不限于此。本申请实施例的信息获取装置2000还可以包括其它部件或者模块，关于这些部件或者模块的具体内容，可以参考相关技术。
此外，为了简单起见，图20中仅示例性示出了各个部件或模块之间的连接关系或信号走向，但是本领域技术人员应该清楚的是，可以采用总线连接等各种相关技术。上述各个部件或模块可以通过例如处理器、存储器、发射机、接收机等硬件设施来实现；本申请实施并不对此进行限制。
由此，第二终端设备通过第一接口和/或第二接口获取相应的小区的***信息，避免第二终端设备重复获取相同或不同小区的***信息以节省第二终端设备的耗电；或者，可以使得第二终端设备获取正确的***信息以便与网络侧的通信更加准确。
第六方面的实施例
本申请实施例提供一种信息发送装置，配置于第一终端设备。
图21是本申请实施例的信息发送装置的一个示意图，本申请实施例从第一终端设备的一侧进行说明。其中，本申请实施例的信息发送装置的实施原理与第一至第四方面的实施例的实施类似，内容相同之处不再重复说明。
如图21所示，本申请实施例的信息发送装置2100包括：
第二连接建立单元2101，其与第二终端设备建立连接；
发送单元2102，其转发或者不转发第二小区的***信息至第二终端设备。
在一些实施例中，在满足第四条件时，发送单元2102通过第二接口转发第二小区的***信息至第二终端设备。
在一些实施例中，在满足第五条件时，发送单元2102不转发第二小区的***信息至第二终端设备。
在一些实施例中，该第四条件包括：第二小区的***信息更新或第一终端设备接收到第二终端设备发送的***信息请求或第一终端设备与第二终端设备建立连接后或该第一终端设备与该第二终端设备未完成连接建立。其中，在该第四条件是第一终端设备与第二终端设备未完成连接建立时，该***信息由发现消息或PC5连接建立相关的消息承载。
在一些实施例中，第一终端设备未接收第二终端设备发送的***信息请求消息。
在一些实施例中，该第五条件包括：该第二终端设备处于该第二小区的覆盖内或该第二终端设备处于该第一小区的覆盖内或该第二终端设备没有处于该第二小区的覆盖内但处于该第一小区的覆盖内。
在一些实施例中，第一终端设备根据发现过程中第二终端设备的处于覆盖内的小区的标识，确定该第二终端设备处于第二小区的覆盖内。
在一些实施例中，该装置还可以包括：(可选，未图示)
接收单元，其接收第二终端设备发送的***信息请求消息。
在一些实施例中，发送单元2102还通过第二接口转发第二小区的***信息改变的指示或寻呼消息给第二终端设备。
在一些实施例中，***信息包括***信息或更新后的***信息或第二终端设备请求的部分***信息。
在一些实施例中，第一接口是蜂窝接口；第二接口是边链路接口。
由此，第一终端设备能够将正确的***信息转发或不转发至第二终端设备，使得第二终端设备能够获取正确的***信息，以便与网络侧的通信更加准确。
值得注意的是，以上仅对与本申请相关的各部件或模块进行了说明，但本申请不限于此。本申请实施例的信息发送装置2100还可以包括其它部件或者模块，关于这些部件或者模块的具体内容，可以参考相关技术。
此外，为了简单起见，图21中仅示例性示出了各个部件或模块之间的连接关系或信号走向，但是本领域技术人员应该清楚的是，可以采用总线连接等各种相关技术。上述各个部件或模块可以通过例如处理器、存储器、发射机、接收机等硬件设施来实现；本申请实施并不对此进行限制。
第七方面的实施例
本申请实施例提供了一种通信***，图22是该通信***2200的示意图，如图22所示，该通信***2200包括网络设备2201，第一终端设备2202，至少一个第二终端设备2203；
在一些实施例中，第一终端设备2202被配置为执行第一至第四方面的实施例中的方法，可以包含图20的装置。在一些实施例中，第二终端设备2203被配置为执行第一至第四方面的实施例的方法，可以包括图21的装置。
本申请实施例还提供一种终端设备。
图23是本申请实施例的终端设备的示意图。如图23所示，该终端设备2300可以包括处理器2301和存储器2302；存储器2302存储有数据和程序，并耦合到处理器2301。值得注意的是，该图是示例性的；还可以使用其它类型的结构，来补充或代替该结构，以实现电信功能或其它功能。
例如，处理器2301可以被配置为执行程序而实现如第一至第四方面的实施例中的方法。
如图23所示，该终端设备2300还可以包括：通信模块2303、输入单元2304、显示器2305、电源2306。其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，终端设备2300也并不是必须要包括图23中所示的所有部件，上述部件并不是必需的；此外，终端设备2300还可以包括图23中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种网络设备。
图24是本申请实施例的网络设备的示意图。如图24所示，网络设备2400可以包括：处理器(例如中央处理器CPU)2401和存储器2402；存储器2402耦合到处理器2401。其中该存储器2402可存储各种数据；此外还存储信息处理的程序，并且在中央处理器2401的控制下执行该程序。
例如，处理器2401可以被配置为执行程序而实现如第一至第四方面的实施例中的方法。
此外，如图24所示，网络设备2400还可以包括：收发机2403和天线2404等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，网络设备2400也并不是必须要包括图24中所示的所有部件；此外，网络设备2400还可以包括图24中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种计算机可读程序，其中当在终端设备中执行所述程序时，所述程序使得计算机在所述第一终端设备中执行第一至第四方面的实施例中的方法。
本申请实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在终端设备中执行第一至第四方面的实施例中的方法。
本申请以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本申请涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。逻辑部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本申请还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本申请实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模块或二者组合。例如，图中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合，既可以对应于计算机程序流程的各个软件模块，亦可以对应于各个硬件模块。这些软件模块，可以分别对应于图中所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息；或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中，也可以存储在可***移动终端的存储卡中。例如，若设备(如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置，则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合，例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本申请进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本申请保护范围的限制。本领域技术人员可以根据本申请的精神和原理对本申请做出各种变型和修改，这些变型和修改也在本申请的范围内。
关于本实施例公开的上述实施方式，还公开了如下的附记：
1.一种信息获取方法，应用于第二终端设备，其特征在于，所述方法包括：
所述第二终端设备与第一终端设备建立连接；
所述第二终端设备通过第一接口和/或第二接口获取至少一个小区的***信息。
2.根据附记1所述的方法，其中，所述第二终端设备通过第一接口和/或第二接口获取至少一个小区的***信息包括：
所述第二终端设备通过第一接口获取第一小区的***信息，或者，
所述第二终端设备通过第二接口获取第二小区的***信息，或者，
所述第二终端设备通过第一接口获取第一小区的***信息，通过第二接口获取第二小区的***信息。
3.根据附记1或2所述的方法，其中，在第二终端设备通过第一接口获取第一小区的***信息时，所述方法还包括：
所述第二终端设备不接收所述第一终端设备通过所述第二接口转发的第二小区的***信息。
4.根据附记2或3所述的方法，其中，所述第一小区是所述第二终端设备的处于覆盖内的小区；所述第二小区是所述第一终端设备的服务小区。
5.根据附记4所述的方法，其中，所述第二小区与所述第一小区相同或不同。
6.根据附记1或2所述的方法，其中，在第二终端设备通过第一接口获取第一小区的***信息时，所述方法还包括：
所述第二终端设备在所述第一接口监听寻呼的短消息(Short Message)或通过所述第二接口接收所述第一终端设备发送的***信息改变指示信息。
7.根据附记1或2所述的方法，其中，在第二终端设备通过第一接口获取第一小区的***信息时，所述方法还包括：
所述第二终端设备通过所述第二接口接收所述第一终端设备转发的寻呼消息，或者从所述第一接口接收寻呼消息。
8.根据附记7所述的方法，其中，所述第二终端设备处于空闲或非激活状态。
9.根据附记1或2所述的方法，其中，所述第二终端设备通过第二接口获取第二小区的***信息包括：
所述第二终端设备接收第一终端设备通过所述第二接口转发的第二小区的***信息。
10.根据附记9所述的方法，其中，在第二终端设备通过第二接口获取第二小区的***信息时，所述方法还包括：
所述第二终端设备不通过所述第一接口获取第一小区的***信息。
11.根据附记1或2或9或10所述的方法，其中，在满足第一条件和/或第二条件时，所述第二终端设备通过第二接口获取第二小区的***信息。
12.根据附记9所述的方法，其中，所述方法还包括：
所述第二终端设备向所述第一终端设备发送***信息请求消息。
13.根据附记12所述的方法，其中，所述第二终端设备定期向所述第一终端设备发送***信息请求消息。
14.根据附记2所述的方法，其中，所述第二终端设备通过第一接口获取第一小区的***信息，通过第二接口获取第二小区的***信息包括：
所述第二终端设备通过第一接口获取第一小区的***信息，以及，
在满足第一条件时，所述第二终端设备接收所述第一终端设备通过所述第二接口转发的***信息；或者在所述第一终端设备与所述第二终端设备建立连接时，所述第二终端设备接收所述第一终端设备通过所述第二接口转发的***信息；或者在所述第一终端设备与所述第二终端设备未完成连接建立时，所述第二终端设备接收所述第一终端设备通过所述第二接口转发的***信息，所述***信息由发现消息或PC5连接建立相关的消息承载。
15.根据附记2或14所述的方法，其中，所述方法还包括：
所述第二终端设备使用通过所述第一接口获取所述第一小区的***信息进行小区选择或小区重选。
16.根据附记15所述的方法，其中，所述第二终端设备处于空闲或非激活状态。
17.根据附记2或3或14所述的方法，其中，所述方法还包括：
所述第二终端设备丢弃或不使用通过所述第一接口获取的第一小区的***信息 或通过所述第二接口获取的第二小区的***信息。
18.根据附记17所述的方法，其中，在满足第三条件时，所述第二终端设备丢弃或不使用通过所述第一接口获取的第一小区的***信息。
19.根据附记18所述的方法，其中，所述第三条件包括以下条件至少之一：
所述第二终端设备已经选择或重选了第一终端设备，不再执行小区选择或重选；
所述第二终端设备从连接态被释放到空闲或非激活状态；
所述第二终端设备判断所述第二小区是否允许所述第二终端设备接入时；
所述第二终端设备通过所述第一终端设备与所述第二小区建立RRC连接过程中；
在所述第二终端设备通过所述第一终端设备进入连接态后。
20.根据附记11或14所述的方法，其中，所述第一条件包括以下条件至少一种：
所述第二终端设备判断所述第二小区是否允许所述第二终端设备接入时；和/或
所述第二终端设备判断是否选择/重选所述第一终端设备作为中继时；和/或
所述第二终端设备通过所述第一终端设备与所述第二小区建立RRC连接过程中；和/或
在所述第二终端设备通过所述第一终端设备进入连接态后。
21.根据附记11所述的方法，其中，所述第二条件包括：所述第二小区的***信息更新。
22.根据附记2或14所述的方法，其中，所述方法还包括：
所述第二终端设备向所述第一终端设备发送***信息请求消息。
23.根据附记1至22任一项所述的方法，其中，所述***信息包括***信息或更新后的***信息或所述第二终端设备请求的部分***信息。
24.根据附记1至23任一项所述的方法，其中，所述第一接口是蜂窝接口。
25.根据附记1至24任一项所述的方法，其中，所述第二接口是边链路接口。
26.一种信息发送方法，应用于第一终端设备，其特征在于，所述方法包括：
所述第一终端设备与第二终端设备建立连接；
所述第一终端设备转发或者不转发第二小区的***信息至所述第二终端设备。
27.根据附记26所述的方法，其特征在于，
在满足第四条件时，所述第一终端设备通过所述第二接口转发所述第二小区的***信息至所述第二终端设备。
28.根据附记26所述的方法，其特征在于，
在满足第五条件时，所述第一终端设备不转发所述第二小区的***信息至所述第二终端设备。
29.根据附记27所述的方法，其特征在于，
所述第四条件包括：所述第二小区的***信息更新或所述第一终端设备接收到所述第二终端设备发送的***信息请求或所述第一终端设备与所述第二终端设备建立连接后或所述第一终端设备与所述第二终端设备未完成连接建立。
30.根据附记29所述的方法，其中，在所述第四条件是所述第一终端设备与所述第二终端设备未完成连接建立时，所述***信息由发现消息或PC5连接建立相关的消息承载。
31.根据附记28所述的方法，其特征在于，
所述第五条件包括：所述第二终端设备处于所述第二小区的覆盖内或所述第二终端设备处于所述第一小区的覆盖内或所述第二终端设备没有处于所述第二小区的覆盖内但处于所述第一小区的覆盖内。
32.根据附记31所述的方法，其特征在于，
所述第一终端设备根据发现过程中所述第二终端设备的处于覆盖内的小区的标识，确定所述第二终端设备处于所述第二小区的覆盖内。
33.根据附记27或30所述的方法，其特征在于，所述方法还包括：
所述第一终端设备接收所述第二终端设备发送的***信息请求消息。
34.根据附记29所述的方法，其特征在于，所述第一终端设备未接收所述第二终端设备发送的***信息请求消息。
35.根据附记26至34任一项所述的方法，其特征在于，
所述第一终端设备还通过第二接口转发所述第二小区的***信息改变的指示或寻呼消息给所述第二终端设备。
36.根据附记26至35任一项所述的方法，其中，所述***信息包括***信息或更新后的***信息或所述第二终端设备请求的部分***信息。
37.根据附记26至36任一项所述的方法，其中，所述第一接口是蜂窝接口。
38.根据附记26至37任一项所述的方法，其中，所述第二接口是边链路接口。
39.一种通信***，包括第一终端设备和第二终端设备，其中，所述第一终端设 备被配置为执行附记26至38任一项所述的方法，所述第二终端设备被配置为执行附记1至25任一项所述的方法。
40.一种终端设备，所述终端设备被配置为执行附记26至38任一项所述的方法，所述第二终端设备被配置为执行附记1至25任一项所述的方法。

Claims (20)

  1. 一种信息获取装置，配置于第二终端设备，其特征在于，所述装置包括：
    第一连接建立单元，其与第一终端设备建立连接；
    接收单元，其通过第一接口和/或第二接口获取至少一个小区的***信息。
  2. 根据权利要求1所述的装置，其中，所述接收单元通过第一接口和/或第二接口获取至少一个小区的***信息包括：
    所述接收单元通过第一接口获取第一小区的***信息，或者，
    所述接收单元通过第二接口获取第二小区的***信息，或者，
    所述接收单元通过第一接口获取第一小区的***信息，通过第二接口获取第二小区的***信息。
  3. 根据权利要求2所述的装置，其中，在所述接收单元通过第一接口获取第一小区的***信息时，所述接收单元不接收所述第一终端设备通过所述第二接口转发的第二小区的***信息。
  4. 根据权利要求2所述的装置，其中，所述第一小区是所述第二终端设备的处于覆盖内的小区；所述第二小区是所述第一终端设备的服务小区；并且，所述第二小区与所述第一小区相同或不同。
  5. 根据权利要求2所述的装置，其中，在所述接收单元通过第一接口获取第一小区的***信息时，所述接收单元在所述第一接口监听寻呼的短消息(Short Message)或通过所述第二接口接收所述第一终端设备发送的***信息改变指示信息。
  6. 根据权利要求2所述的装置，其中，在所述接收单元通过第一接口获取第一小区的***信息时，
    所述接收单元通过所述第二接口接收所述第一终端设备转发的寻呼消息，或者从所述第一接口接收寻呼消息。
  7. 根据权利要求2所述的装置，其中，所述接收单元通过第二接口获取第二小区的***信息包括：
    所述接收单元接收第一终端设备通过所述第二接口转发的第二小区的***信息。
  8. 根据权利要求2所述的装置，其中，所述接收单元通过第二接口获取第二小区的***信息包括：
    在第二终端设备通过第二接口获取第二小区的***信息时，所述接收单元不通过所述第一接口获取第一小区的***信息。
  9. 根据权利要求8所述的装置，其中，在满足第一条件和/或第二条件时，所述接收单元通过第二接口获取第二小区的***信息。
  10. 根据权利要求7所述的装置，其中，
    所述第一终端设备还包括发送单元，所述发送单元向所述第一终端设备发送***信息请求消息。
  11. 根据权利要求2所述的装置，其中，所述接收单元通过第一接口获取第一小区的***信息，通过第二接口获取第二小区的***信息包括：
    所述接收单元通过第一接口获取第一小区的***信息，以及，
    在满足第一条件时，所述接收单元接收所述第一终端设备通过所述第二接口转发的***信息；或者在所述第一终端设备与所述第二终端设备建立连接时，所述接收单元接收所述第一终端设备通过所述第二接口转发的***信息；或者在所述第一终端设备与所述第二终端设备未完成连接建立时，所述接收单元接收所述第一终端设备通过所述第二接口转发的***信息，所述***信息由发现消息或PC5连接建立相关的消息承载。
  12. 根据权利要求11所述的装置，其中，
    所述第二终端设备丢弃或不使用通过所述第一接口获取的第一小区的***信息或通过所述第二接口获取的第二小区的***信息。
  13. 根据权利要求12所述的装置，其中，
    在满足第三条件时，所述第二终端设备丢弃或不使用通过所述第一接口获取的第一小区的***信息，
    其中，所述第三条件包括以下条件至少之一：
    所述第二终端设备已经选择或重选了第一终端设备，不再执行小区选择或重选；
    所述第二终端设备从连接态被释放到空闲或非激活状态；
    所述第二终端设备判断所述第二小区是否允许所述第二终端设备接入时；
    所述第二终端设备通过所述第一终端设备与所述第二小区建立RRC连接过程中；
    在所述第二终端设备通过所述第一终端设备进入连接态后。
  14. 根据权利要求9或11所述的装置，其中，所述第一条件包括以下条件至少 一种：
    所述第二终端设备判断所述第二小区是否允许所述第二终端设备接入时；和/或所述第二终端设备判断是否选择/重选所述第一终端设备作为中继时；和/或
    所述第二终端设备通过所述第一终端设备与所述第二小区建立RRC连接过程中；和/或
    在所述第二终端设备通过所述第一终端设备进入连接态后。
  15. 根据权利要求9所述的装置，其中，所述第二条件包括：所述第二小区的***信息更新。
  16. 一种信息发送装置，配置于第一终端设备，其特征在于，所述装置包括：
    第二连接建立单元，其与第二终端设备建立连接；
    发送单元，其转发或者不转发第二小区的***信息至所述第二终端设备。
  17. 根据权利要求16所述的装置，其中，
    在满足第四条件时，所述发送单元通过所述第二接口转发所述第二小区的***信息至所述第二终端设备。
  18. 根据权利要求17所述的装置，其中，
    在满足第五条件时，所述发送单元不转发所述第二小区的***信息至所述第二终端设备。
  19. 根据权利要求17所述的装置，其中，
    所述第四条件包括：所述第二小区的***信息更新或所述第一终端设备接收到所述第二终端设备发送的***信息请求或所述第一终端设备与所述第二终端设备建立连接后或所述第一终端设备与所述第二终端设备未完成连接建立；
    所述第五条件包括：所述第二终端设备处于所述第二小区的覆盖内或所述第二终端设备处于所述第一小区的覆盖内或所述第二终端设备没有处于所述第二小区的覆盖内但处于所述第一小区的覆盖内。
  20. 一种通信***，该通信***包括：
    权利要求1-15任意一项所述的第二终端设备；以及
    权利要求16-19任意一项所述的第一终端设备。
PCT/CN2021/124651 2021-10-19 2021-10-19 信息获取方法，信息发送方法、装置和*** WO2023065108A1 (zh)

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