WO2023065108A1

WO2023065108A1 - Information acquisition method and apparatus, information sending method and apparatus, and system

Info

Publication number: WO2023065108A1
Application number: PCT/CN2021/124651
Authority: WO
Inventors: 李国荣; 张磊; 王昕�
Original assignee: 富士通株式会社; 李国荣; 张磊; 王昕�
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2023-04-27

Abstract

Provided in the embodiments of the present application are an information acquisition method and apparatus, an information sending method and apparatus, and a system. The information acquisition method comprises: a second user equipment establishing a connection with a first user equipment; and the second user equipment acquiring system information of at least one cell by means of a first interface and/or a second interface.

Description

Information acquisition method, information transmission method, device and system

technical field

This application relates to the field of communication.

Background technique

In the current communication network, the terminal device accesses the network part through the Uu interface. Currently, at 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.

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.

It should be noted that the above introduction to the technical background is only for the convenience of a clear and complete description of the technical solution of the present application, and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are known to those skilled in the art just because these solutions are described in the background technology section of this application.

Contents of the invention

In R17, sidelink relay (Sidelink relay, SL relay) has been studied. Figure 3 shows a schematic diagram of the sidelink relay scenario. In scenario 1, 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. In scenario 2, 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. Among them, NR (New Radio) Uu is used on the Uu link of the relay UE, and the NR side link is used on the PC5 between the relay UE and the remote UE.

In the above scenario, 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. When 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. In addition, 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.

The inventor found that if the Remote UE is also in the coverage (in-coverage) of a cell, after the Remote UE and the Relay UE establish a connection, how does the Remote UE obtain system information, or which system information to obtain, or whether the Relay UE actively Forwarding the system information of the serving cell of the Relay UE to the Remote UE is a problem that needs to be solved.

In order to solve at least one of the above problems or other similar problems, embodiments of the present application provide an information acquisition method, an information sending method, device, and system.

According to an aspect of the embodiments of the present application, there is provided 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.

According to another aspect of the embodiment of the present application, there is provided 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.

According to another aspect of the embodiments of the present application, a communication system is provided, including the second terminal device in the foregoing aspect and/or including the first terminal device in the foregoing aspect.

One of the beneficial effects of the embodiments of the present application is that: 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.

With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not limited thereby in scope. Embodiments of the present application encompass many changes, modifications and equivalents within the spirit and scope of the appended claims.

Features described and/or illustrated with respect to one embodiment can be used in the same or similar manner in one or more other embodiments, in combination with, or instead of features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of a feature, integer, step or component, but does not exclude the presence or addition of one or more other features, integers, steps or components.

Description of drawings

Elements and features described in one drawing or one embodiment of an embodiment of the present application may be combined with elements and features shown in one or more other drawings or embodiments. Furthermore, in the drawings, like numerals indicate corresponding parts in the several figures and may be used to indicate corresponding parts used in more than one embodiment.

The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation of the present application, and explain the principle of the present application together with the text description. Apparently, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative efforts. In the attached picture:

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;

Figures 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;

Figure 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.

Detailed ways

The foregoing and other features of the present application will become apparent from the following description, taken with reference to the accompanying drawings. In the specification and drawings, specific embodiments of the present application are specifically disclosed, which indicate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments, on the contrary, the present application The application includes all amendments, variations and equivalents that come within the scope of the appended claims.

In this embodiment of the 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.

In the embodiments of the present application, the singular forms "a", "the" and the like include plural forms, which should be broadly understood as "one" or "a class" and not limited to the meaning of "one"; in addition, the term "all The above should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. In addition, the term "according to" shall be understood as "at least in part based on..." and the term "based on" shall be understood as "at least in part based on...", unless the context clearly indicates otherwise. In addition, "system information request" and "system information request message" expressions are interchangeable.

In this embodiment of the application, 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.

Moreover, 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.

In this embodiment of the present application, the term "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.

Among them, 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.). And the term "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.

In the embodiment of the present application, the term "User Equipment" (UE, 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.

Among them, 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.

For another example, in scenarios such as the Internet of Things (IoT, Internet of Things), 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.

In this embodiment of the application, Relay UE means a relay-capable terminal device (UE-to-Network Relay UE) that can directly communicate with a network device, and Remote UE means a terminal device that needs to be relayed through a Relay UE to communicate with a network device Terminal Equipment.

At present, 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. For layer 2 terminal equipment-network equipment relay (L2UE-to-Network relay), after the Remote UE connects to the network through the Relay UE (connected state), the Relay UE and the Remote UE are controlled by the serving cell of the Relay UE.

In addition, during the discovery (discovery) or selection/reselection (selection/reselection) process of the Relay, 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.

In the following description of this application, 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.

Various embodiments of the present application will be described below in conjunction with the accompanying drawings. These embodiments are exemplary only, and do not limit the present application.

Embodiments of the first aspect

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.

In some implementation manners, the first terminal device may be a Relay UE, and the second terminal device may be a Remote UE, where 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:

401. The second terminal device establishes a connection with the first terminal device;

402. The second terminal device acquires system information of at least one cell through the first interface and/or the second interface.

Thus, 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.

In some implementation manners, in 401, 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 For the process of reselection and PC5 unicast link establishment, reference may be made to the prior art, which will not be repeated here.

In some embodiments, in 401, 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.

In some embodiments, 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; optionally, 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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, the above Fig. 4 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto. For example, 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. For example, 401 may be performed before 402, or may be performed at the same time.

In some implementation manners, in 402, 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.

In some embodiments, 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.

Taking FIG. 3 as an example, as shown in scene 2, the first cell is the same as the second cell; as shown in scene 3, the first cell is different from the second cell.

(1) The second terminal device obtains the system information of the first cell through the first interface

In some embodiments, 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.

(2) The second terminal device obtains the system information of the second cell through the second interface

In some embodiments, 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.

Or, in some embodiments, 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.

(3) 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

In some embodiments, 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 first cell through the first interface, The system information of the second cell is obtained through the second interface. Optionally, after the system information of the two cells is obtained, the system information of one cell may not be used or discarded.

In some embodiments, corresponding to the side of the second terminal device, 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:

501. The first terminal device establishes a connection with the second terminal device;

502. The first terminal device forwards or does not forward the system information of the second cell to the second terminal device.

Thus, 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.

In some embodiments, 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. When 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.

402 and 502 will be described below in conjunction with the embodiments of the second aspect to the fourth aspect respectively.

Embodiments of the second aspect

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. For the same technical solution as the embodiment of the first aspect, please refer to the embodiment of the first aspect for details, and details are not repeated here.

In some embodiments, when the first condition is met, the second terminal device 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.

In some embodiments, the first condition includes at least one of the following conditions:

When the second terminal device judges whether the second cell allows the second terminal device to access; and/or

When the second terminal device determines whether to select/reselect the first terminal device as a relay; and/or

The second terminal device is in the process of establishing 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.

In some embodiments, 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.

In some embodiments, during the process of establishing an RRC connection between the second terminal device and the second cell through the first terminal device; and/or after the second terminal device enters the connected state through the first terminal device, there is no need Considering 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.

In some embodiments, 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 For example, the system information request may be an on-demand system information request (on-demand SI request), and the on-demand system information request (on-demand SI request) includes the type of part of the system information requested, but the embodiment of the present application This is not a limitation. When 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.

In some embodiments, 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. As shown in Fig. 6, the network device of the second cell sends the system information to the first terminal device. When the first condition is met, the second terminal device can send the system information to the first terminal device. For the information request, after receiving the system information request, the first terminal device forwards the system information to the second terminal device. In addition (not shown), 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.

Thus, 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.

In the embodiment of the second aspect, 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. For example, when the first cell and the second cell are the same or different, 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.

Embodiments of the third aspect

Since the first cell and the second cell are the same, there is only system information of one cell (system information of the first cell or system information of the second cell), and the second terminal device can obtain the system information and the system information of the second cell through the first interface. /or the system information can be obtained through the second interface. 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 .

In some embodiments, 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).

In some embodiments, if the network device has broadcast system information, 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. The specific implementation manner is similar to the above-mentioned embodiment of the second aspect, and will not be repeated here.

In some embodiments, for the case of system information update. For example, 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.

For example, 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. The format of the Short Message is as follows, Bit 1 is the highest bit.

For example, 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.

When there is downlink data to be sent, 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.

In the above embodiments, 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.

For example, 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 During a process (such as a discovery process or a selection (reselection) process), 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, When 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. Wherein, 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.

In the above embodiment, although 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).

In some embodiments, 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.

For example, 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.

In the above embodiment, 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. As shown in Fig. 9, when the system information of the second cell is updated, 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. Wherein, the first terminal device may forward all system information or all updated system information, or system information requested by the second terminal device before.

Alternatively, in the above embodiment, 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. For example, the second terminal device may periodically (periodically) send an on-demand system information request to the first terminal device to obtain updated system information. For example, when a fourth condition is met, 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. As shown in Fig. 10, 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.

Through the foregoing embodiments of the present application, it is possible to prevent the second terminal device from repeatedly acquiring system information, so as to save power consumption of the second terminal device.

Embodiments of the fourth aspect

Since the first cell and the second cell are different, there are system information of two cells (system information of the first cell and system information of the second cell), and the second terminal device can obtain the system information of one cell, or obtain The system information of the two cells is kept, and the system information of the two cells can also be obtained, and the system information of one of the cells is discarded or not used. 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.

I. Get the system information of a cell

In some embodiments, 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. In the foregoing embodiment, the first terminal device may not (actively) forward the system information to the second terminal device. For example, when a fifth condition is met, the first terminal device does not (actively) forward the system information to the second terminal device, and the fifth condition includes: the second terminal device is within the coverage of the first cell.

In some embodiments, if the network device has broadcast system information, 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. The specific implementation manner is similar to the above-mentioned embodiment of the second aspect, and will not be repeated here.

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.

In some embodiments, 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.

For example, when the third condition is met, 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. 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;

When the second terminal device judges whether the second cell allows the second terminal device to access;

The second terminal device is in the process of establishing an RRC connection with the second cell through the first terminal device;

For example, 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 When 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.

For example, 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 .

In the above embodiment, 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.

For example, when the fourth condition is met, 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 , or, 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 PC5 link establishment.

Figure 13 is a schematic diagram of the system information acquisition method. As shown in Figure 13, 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.

Alternatively, in the above embodiment, 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.

For example, when a fourth condition is met, 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. As shown in Fig. 14, 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.

II. Obtain and save the system information of the two cells

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

For example, when the fourth condition is met, 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 , or, 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 establishment of the PC5 connection.

Figure 15 is a schematic diagram of the system information acquisition method. As shown in Figure 15, 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.

Fig. 16 is a schematic diagram of the system information acquisition method. As shown in Fig. 16, 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.

In some embodiments, when the foregoing first condition is met, the second terminal device uses system information of the second cell.

In some embodiments, 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.

In some embodiments, after acquiring the system information of the first cell and the system information of the second cell, the second terminal device may store the system information of the first cell and the second cell.

III. Obtain the system information of two cells, discard or not use the system information of one of the cells

In some embodiments, 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. In the above embodiment, 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.

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.

In some embodiments, 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.

For example, when the third condition is met, 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:

For example, 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 When 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.

For example, 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.

For example, when the fourth condition is met, 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 , or, 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. As shown in Figure 18, 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.

Fig. 19 is a schematic diagram of the system information acquisition method. As shown in Fig. 19, 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.

In this way, the second terminal device can acquire correct system information so as to communicate with the network side more accurately.

It should be noted that the above accompanying drawings 6 to 19 only schematically illustrate the embodiment of the present application, but the present application is not limited thereto. For example, 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 can make appropriate modifications according to the above content, and are not limited to the descriptions in the above-mentioned accompanying drawings 6 to 19 .

The above embodiments are only illustrative examples of the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications can also be made on the basis of the above various embodiments. For example, each of the above-mentioned embodiments may be used alone, or one or more of the above-mentioned embodiments may be combined.

Embodiments of the fifth aspect

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. Wherein, 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.

As shown in Figure 20, 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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

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.

In some embodiments, when the first condition and/or the second condition are met, the receiving unit 2002 acquires the system information of the second cell through the second interface.

In some embodiments, the device may also include: (optional, not shown)

A sending unit, configured to send a system information request message to the first terminal device.

In some embodiments, the sending unit periodically sends a system information request message to the first terminal device.

In some embodiments, 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,

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.

In some embodiments, the device may also include: (optional, not shown)

A selection unit, the 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.

In some embodiments, 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.

In some embodiments, when the third condition is met, the second terminal device discards or does not use the system information of the first cell obtained through the first interface,

Wherein, 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;

In some embodiments, the second condition includes: system information of the second cell is updated.

In some embodiments, the system information includes system information or updated system information or part of the system information requested by the second terminal device.

In some embodiments, the first interface is a cellular interface; the second interface is a sidelink interface.

For the implementation manners of the above-mentioned unit modules, reference may be made to the embodiments of the first to fourth aspects, and repeated descriptions will not be repeated.

It should be noted that the above only describes the components or modules related to the present application, but the present application is not limited thereto. 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.

In addition, for the sake of simplicity, 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.

Embodiments of the sixth aspect

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. Wherein, 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.

As shown in Figure 21, 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.

In some embodiments, when the fourth condition is met, the sending unit 2102 forwards the system information of the second cell to the second terminal device through the second interface.

In some embodiments, 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.

In some embodiments, 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. Wherein, when the fourth condition is that 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.

In some embodiments, the first terminal device does not receive the system information request message sent by the second terminal device.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

It should be noted that the above only describes the components or modules related to the present application, but the present application is not limited thereto. 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.

In addition, for the sake of simplicity, 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.

Embodiments of the seventh aspect

An embodiment of the present application provides a communication system. 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;

In some embodiments, 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 . In some embodiments, 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. As shown in FIG. 23 , 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.

For example, the processor 2301 may be configured to execute a program to implement the methods in the embodiments of the first to fourth aspects.

As shown in FIG. 23 , the terminal device 2300 may further include: a communication module 2303 , an input unit 2304 , a display 2305 , and a power supply 2306 . Wherein, 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. As shown in FIG. 24 , 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 . Among them, 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 .

For example, the processor 2401 may be configured to execute a program to implement the methods in the embodiments of the first to fourth aspects.

In addition, as shown in FIG. 24 , 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. For example, 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).

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. For example, if the device (such as a mobile terminal) adopts a large-capacity MEGA-SIM card or a large-capacity flash memory device, 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. 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.

The present application has been described above in conjunction with specific implementation manners, but those skilled in the art should be clear that these descriptions are exemplary rather than limiting the protection scope of the present application. Those skilled in the art can make various variations and modifications to this application according to the spirit and principles of this application, and these variations and modifications are also within the scope of this application.

Regarding the above-mentioned implementation mode disclosed in this embodiment, the following additional notes are also disclosed:

1. 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.

2. The method according to Supplementary Note 1, wherein 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, and obtains the system information of the second cell through the second interface.

3. The method according to Supplement 1 or 2, wherein, when the second terminal device obtains the system information of the first cell through the first interface, the method further includes:

The second terminal device does not receive the system information of the second cell forwarded by the first terminal device through the second interface.

4. The method according to Supplement 2 or 3, wherein the first cell is a cell within the coverage of the second terminal device; the second cell is a serving cell of the first terminal device.

5. The method according to supplementary note 4, wherein the second cell is the same as or different from the first cell.

6. The method according to Supplementary Note 1 or 2, wherein, when the second terminal device obtains the system information of the first cell through the first interface, the method further includes:

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.

7. The method according to Supplement 1 or 2, wherein, when the second terminal device obtains the system information of the first cell through the first interface, the method further includes:

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.

8. The method according to supplementary note 7, wherein the second terminal device is in an idle or inactive state.

9. The method according to Supplement 1 or 2, wherein the second terminal device obtaining the system information of the second cell through the second interface includes:

The second terminal device receives the system information of the second cell forwarded by the first terminal device through the second interface.

10. The method according to Supplementary Note 9, wherein when the second terminal device obtains the system information of the second cell 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.

11. The method according to Supplementary Note 1 or 2 or 9 or 10, wherein when the first condition and/or the second condition are met, the second terminal device obtains the system information of the second cell through the second interface.

12. The method according to supplementary note 9, wherein the method further comprises:

The second terminal device sends a system information request message to the first terminal device.

13. The method according to supplementary note 12, wherein the second terminal device periodically sends a system information request message to the first terminal device.

14. The method according to Supplement 2, wherein 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 includes:

The second terminal device acquires 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; 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.

15. The method according to Supplementary Note 2 or 14, wherein the method further comprises:

The second terminal device uses the system information of the first cell obtained through the first interface to perform cell selection or cell reselection.

16. The method according to supplementary note 15, wherein the second terminal device is in an idle or inactive state.

17. The method according to Supplementary Note 2 or 3 or 14, wherein the method further comprises:

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.

18. The method according to supplementary note 17, wherein, when the third condition is met, the second terminal device discards or does not use the system information of the first cell obtained through the first interface.

19. The method according to supplementary note 18, wherein the third condition includes at least one of the following conditions:

said second terminal device is released from a connected state to an idle or inactive state;

When the second terminal device determines whether the second cell allows access by the second terminal device;

20. The method according to Supplementary note 11 or 14, wherein the first condition includes at least one of the following conditions:

When the second terminal device determines whether the second cell allows access by the second terminal device; and/or

21. The method according to supplementary note 11, wherein the second condition includes: system information of the second cell is updated.

22. The method according to Supplement 2 or 14, wherein the method further comprises:

23. The method according to any one of Supplements 1 to 22, wherein the system information includes system information or updated system information or part of the system information requested by the second terminal device.

24. The method according to any one of Supplements 1 to 23, wherein the first interface is a cellular interface.

25. The method according to any one of Supplements 1 to 24, wherein the second interface is a side link interface.

26. 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.

27. The method according to appendix 26, characterized in that,

When the fourth condition is met, the first terminal device forwards the system information of the second cell to the second terminal device through the second interface.

28. The method according to appendix 26, characterized in that,

When the fifth condition is met, the first terminal device does not forward the system information of the second cell to the second terminal device.

29. The method according to appendix 27, characterized in that,

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.

30. The method according to supplementary note 29, wherein, when the fourth condition is that the connection establishment between the first terminal device and the second terminal device has not been completed, the system information is established by a discovery message or a PC5 connection related message bearer.

31. The method according to appendix 28, characterized in that,

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.

32. The method according to appendix 31, characterized in that,

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.

33. The method according to Supplementary Note 27 or 30, further comprising:

The first terminal device receives the system information request message sent by the second terminal device.

34. The method according to supplementary note 29, wherein the first terminal device does not receive the system information request message sent by the second terminal device.

35. The method according to any one of Supplements 26 to 34, characterized in that,

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.

36. The method according to any one of Supplements 26 to 35, wherein the system information includes system information or updated system information or part of the system information requested by the second terminal device.

37. The method according to any one of Supplements 26 to 36, wherein the first interface is a cellular interface.

38. The method according to any one of Supplements 26 to 37, wherein the second interface is an edge link interface.

39. 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.

40. 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 .

Claims

An information acquisition device configured on a second terminal device, characterized in that 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.
The device according to claim 1, wherein the receiving unit obtaining system information of at least one cell through the first interface and/or the second interface comprises:

The receiving unit obtains the system information of the first cell through the first interface, or,

The receiving unit obtains the system information of the second cell through the second interface, or,

The receiving unit 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 apparatus according to claim 2, wherein when the receiving unit obtains the system information of the first cell through the first interface, the receiving unit does not receive the second message forwarded by the first terminal device through the second interface. System information of the second cell.
The apparatus according to claim 2, wherein 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 The second cell is the same as or different from the first cell.
The device according to claim 2, wherein, when the receiving unit obtains the system information of the first cell through the first interface, the receiving unit monitors the paging short message (Short Message) or Receive system information change indication information sent by the first terminal device through the second interface.
The device according to claim 2, wherein when the receiving unit obtains the system information of the first cell through the first interface,

The receiving unit receives the paging message forwarded by the first terminal device through the second interface, or receives the paging message from the first interface.
The device according to claim 2, wherein the receiving unit obtaining the system information of the second cell through the second interface comprises:

The receiving unit receives system information of the second cell forwarded by the first terminal device through the second interface.
The device according to claim 2, wherein the receiving unit obtaining the system information of the second cell through the second interface comprises:

When the second terminal device obtains the system information of the second cell through the second interface, the receiving unit does not obtain the system information of the first cell through the first interface.
The apparatus according to claim 8, wherein, when the first condition and/or the second condition are met, the receiving unit acquires the system information of the second cell through the second interface.
The apparatus according to claim 7, wherein,

The first terminal device further includes a sending unit, where the sending unit sends a system information request message to the first terminal device.
The device according to claim 2, wherein the receiving unit 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 comprises:

The receiving unit acquires system information of the first cell through the first interface, and,

When the first condition is met, the receiving unit 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 The receiving unit 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 receiving unit receives the first The system information forwarded by the terminal device through the second interface is carried by a discovery message or a message related to PC5 connection establishment.
The apparatus of claim 11, wherein,

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 apparatus of claim 12, wherein,

When the third condition is met, the second terminal device discards or does not use the system information of the first cell obtained through the first interface,

Wherein, the 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;

said second terminal device is released from a connected state to an idle or inactive state;

When 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;

After the second terminal device enters the connected state through the first terminal device.
The apparatus according to claim 9 or 11, wherein said first condition comprises at least one of the following conditions:

When the second terminal device judges whether the second cell allows the second terminal device to access; and/or when the second terminal device judges whether to select/reselect the first terminal device as a relay; and / or

The second terminal device is in the process of establishing 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 apparatus according to claim 9, wherein the second condition comprises: system information update of the second cell.
An information sending device configured in a first terminal device, characterized in that 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.
The apparatus of claim 16, wherein,

When the fourth condition is met, the sending unit forwards the system information of the second cell to the second terminal device through the second interface.
The apparatus of claim 17, wherein,

When the fifth condition is met, the sending unit does not forward the system information of the second cell to the second terminal device.
The apparatus of claim 17, wherein,

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 communicates with 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.
A communication system comprising:

The second terminal device according to any one of claims 1-15; and

The first terminal device according to any one of claims 16-19.