CN113973350A

CN113973350A - Information transmission method, relay terminal and relayed terminal

Info

Publication number: CN113973350A
Application number: CN202010725854.1A
Authority: CN
Inventors: 王达; 张惠英
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2022-01-25

Abstract

The invention provides an information transmission method, a relay terminal and a relayed terminal, wherein the method applied to the relay terminal side comprises the following steps: transmitting the target information to the relayed terminal; the target information comprises first frequency point information which can be searched by the relay terminal; or, the target information is used to indicate whether the relay terminal can search the frequency point information required by the relayed terminal. The invention can solve the problem that the system information of the specific carrier wave required to be acquired by the relayed terminal cannot be met in the current relay system.

Description

Information transmission method, relay terminal and relayed terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an information transmission method, a relay terminal, and a relayed terminal.

Background

One current solution to extend network coverage is to introduce relays. The relay may be a terminal with a relay function, such as: user equipment-to-Network Relay (UE-to-Network Relay), user equipment-to-user equipment Relay (UE-to-UE Relay). No matter in UE-to-Network Relay or UE-to-UE Relay scenario, the relayed terminal (or called UE) needs to select a Relay UE to Relay data to the relayed UE or Network on the other end. Under the condition that the link quality is poor and the like, the relayed UE also needs to perform relay UE reselection, so as to select one available relay UE to continue service transmission.

In an existing Long Term Evolution (LTE) relay system, a relay UE can only forward a system message of a serving frequency point/cell thereof, and a relayed UE may need to acquire system information of a specific carrier (for example, a carrier list configured for a specific service), and there is no solution for such a situation.

Disclosure of Invention

The invention provides an information transmission method, a relay terminal and a relayed terminal, and solves the problem that the system information of a specific carrier wave required by the relayed UE cannot be acquired in the conventional relay system.

In a first aspect, an embodiment of the present invention provides an information transmission method, which is applied to a relay terminal, and the method includes:

transmitting the target information to the relayed terminal;

the target information comprises first frequency point information which can be searched by the relay terminal;

or, the target information is used to indicate whether the relay terminal can search the frequency point information required by the relayed terminal.

Optionally, the first frequency point information is at least one of the following:

supporting frequency point information of a direct communication interface;

and the relay terminal searches the frequency point information on the frequency point supported by the relay terminal.

Optionally, the first frequency point information includes: frequency point information of a serving cell of the relay terminal;

alternatively, the first and second electrodes may be,

the first frequency point information includes: frequency point information of a serving cell of the relay terminal, and frequency point information of a first cell except the serving cell of the relay terminal; wherein the relay terminal is within a coverage of the first cell.

Optionally, when the target information includes first frequency point information that can be searched by the relay terminal, the sending the target information to the relayed terminal includes:

under the condition that the frequency point information which can be searched by the relay terminal is updated, updating the first frequency point information;

and sending the updated first frequency point information to the relayed terminal.

Optionally, the sending the target information to the relayed terminal includes:

sending a first message to the relayed terminal, wherein the first message carries the target information;

wherein the first message comprises: one of a direct link broadcast message PSBCH, a direct communication interface signaling PC5-S message, a radio resource control RRC message, a control element MAC CE for media access control, and direct link control information SCI.

and sending the target information to the relayed terminal in a broadcasting mode.

Optionally, the sending the target information to the relayed terminal in a broadcast manner includes:

and sending the target information to the relayed terminal in a periodic broadcast mode.

Optionally, the target information further includes an identifier of the relay terminal on a direct communication interface.

Optionally, before sending the target information to the relayed terminal, the method further includes:

receiving request information sent by the relayed terminal; the request information is used for requesting to establish connection with the relay terminal, or the request information is used for requesting to select or reselect a relay, or the request information is used for requesting the relay terminal to send the target information;

the sending target information to the relayed terminal includes:

and sending the target information to the relayed terminal according to the request information.

Optionally, the receiving the request information sent by the relayed terminal includes:

and receiving the request information sent by the relayed terminal in a broadcasting, multicasting or unicasting mode.

Optionally, the request information includes second frequency point information, where the second frequency point information is frequency point information required by the relayed terminal;

the sending the target information to the relayed terminal according to the request information includes:

determining the first frequency point information according to the second frequency point information; wherein the first frequency point information is a subset of the second frequency point information;

and sending the first frequency point information to the relayed terminal.

determining whether the second frequency point information is searched or not according to the second frequency point information;

if the second frequency point information can be searched, sending confirmation information to the relayed terminal;

and if the second frequency point information can not be searched, transmitting negative acknowledgement information to the relayed terminal.

Optionally, the target information further includes at least one of an identifier of the relay terminal on the direct communication interface and an identifier of the relayed terminal on the direct communication interface.

In a second aspect, an embodiment of the present invention further provides a relay terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

transmitting the target information to the relayed terminal;

supporting frequency point information of a direct communication interface;

alternatively, the first and second electrodes may be,

Optionally, when the target information includes first frequency point information that can be searched by the relay terminal, the processor implements the following steps when executing the program:

Optionally, the processor, when executing the program, implements the following steps:

before sending target information to a relayed terminal, receiving request information sent by the relayed terminal; the request information is used for requesting to establish connection with the relay terminal, or the request information is used for requesting to select or reselect a relay, or the request information is used for requesting the relay terminal to send the target information;

the processor implements the following steps when executing the program:

and sending the first frequency point information to the relayed terminal.

the processor implements the following steps when executing the program:

In a third aspect, an embodiment of the present invention further provides a relay terminal, including:

the sending module is used for sending the target information to the relayed terminal;

In a fourth aspect, an embodiment of the present invention provides a readable storage medium, on which a program is stored, where the program, when executed by a processor, implements the steps of the information transmission method according to the first aspect.

In a fifth aspect, an embodiment of the present invention further provides an information transmission method, which is applied to a relayed terminal, where the method includes:

receiving target information sent by a relay terminal; the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal;

and performing relay selection or reselection according to the target information.

Optionally, the performing, according to the target information, relay selection or reselection includes:

under the condition that the first frequency point information contains the frequency point information required by the relayed terminal, selecting or reselecting the relayed terminal;

alternatively, the first and second electrodes may be,

and under the condition that the target information indicates that the relay terminal can search the frequency point information required by the relayed terminal, selecting or reselecting the relay terminal.

Optionally, the receiving target information sent by the relay terminal includes:

receiving a first message sent by the relay terminal, wherein the first message carries the target information;

and receiving the target information sent by the relay terminal in a broadcasting mode.

Optionally, before receiving the target information sent by the relay terminal, the method further includes:

sending request information to the relay terminal; the request information is used for requesting to establish connection with the relay terminal, or the request information is used for requesting to select or reselect a relay, or the request information is used for requesting the relay terminal to send the target information;

the receiving of the target information sent by the relay terminal includes:

and receiving the target information sent by the relay terminal according to the request information.

Optionally, the sending the request information to the relay terminal includes:

and sending the request information to the relay terminal in a broadcasting, multicasting or unicasting mode.

wherein the first frequency point information is a subset of the second frequency point information.

Optionally, the sending the request information to the relay terminal includes:

sending a second message to the relay terminal, wherein the second message carries the request information;

wherein the second message comprises: PC5-S message, RRC message, MAC CE, SCI.

Optionally, the request information includes at least one of an identification of the relaying terminal on the direct communication interface and an identification of the relayed terminal on the direct communication interface.

In a sixth aspect, an embodiment of the present invention further provides a relayed terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

alternatively, the first and second electrodes may be,

wherein the second message comprises: PC5-S message, RRC message, MAC CE, SCI.

In a seventh aspect, an embodiment of the present invention provides a relayed terminal, including:

the receiving module is used for receiving the target information sent by the relay terminal; the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal;

and the processing module is used for performing relay selection or reselection according to the target information.

In an eighth aspect, the embodiment of the present invention provides a readable storage medium, on which a program is stored, where the program is executed by a processor to implement the steps of the information transmission method according to the fifth aspect.

The technical scheme of the invention has the beneficial effects that:

the relay terminal sends target information to the relayed terminal, wherein the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal, so that the relayed terminal can be ensured to access the required frequency point information, the required system information can be ensured to be obtained, and the problem that the system information of a specific carrier wave which needs to be obtained by the relayed terminal cannot be met in the current relay system is solved.

Drawings

Fig. 1 is a schematic diagram illustrating a communication scheme for network centralized control in an LTE system;

fig. 2 shows a D2D discovery/communication diagram;

FIG. 3 is a diagram of a UE-to-Network Relay according to an embodiment of the present invention;

FIG. 4 is a diagram of a UE-to-UE Relay according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating an information transmission method at a relay terminal side according to an embodiment of the present invention;

fig. 6 shows one of block diagrams of a relay terminal according to an embodiment of the present invention;

fig. 7 shows a second block diagram of a relay terminal according to an embodiment of the invention;

fig. 8 is a flowchart showing an information transmission method at the relayed terminal side according to the embodiment of the present invention;

fig. 9 shows one of block diagrams of a relayed terminal according to an embodiment of the present invention;

fig. 10 shows a second block diagram of a relayed terminal according to the embodiment of the present invention;

fig. 11 shows one of the interaction diagrams of the relay terminal and the relayed terminal according to the embodiment of the present invention;

fig. 12 is a second schematic diagram illustrating interaction between a relay terminal and a relayed terminal according to the embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

In the embodiment of the present invention, the access network may be an access network including a Macro Base Station (Macro Base Station), a micro Base Station (Pico Base Station), a Node B (3G mobile Station), an enhanced Base Station (eNB), a 5G mobile Base Station (gNB), a Home enhanced Base Station (Femto eNB or Home eNode B or Home eNB or HeNB), a relay Station, an access point, an RRU (Remote Radio Unit, Remote Radio module), an RRH (Remote Radio Head), and the like. The user terminal may be a mobile phone (or handset), or other device capable of sending or receiving wireless signals, including user Equipment, a Personal Digital Assistant (PDA), a wireless modem, a wireless communicator, a handheld device, a laptop computer, a cordless phone, a Wireless Local Loop (WLL) station, a CPE (Customer Premise Equipment) or a mobile smart hotspot capable of converting mobile signals into WiFi signals, a smart appliance, or other devices capable of autonomously communicating with a mobile communication network without human operation, and so on.

Optionally, the wireless communication modes include the following:

(1) cellular network communication

The cellular Network communication method is that the terminals (UE1, UE2) and the Network device transmit uplink and downlink data/control information through a Uu interface (U represents User to Network interface; U represents Universal), as shown in fig. 1.

(2) Direct communication

Direct communication, such as Device-to-Device (D2D), refers to the way in which nearby terminals can transfer data over a direct communication link (Sidelink, SL or PC5) within close range. The wireless interface corresponding to the sildelink is called a direct communication interface (also called the sildelink interface or the PC5 interface), as shown in fig. 2.

(3) UE relay

By introducing relays, network coverage can be extended. Wherein the relay may be a terminal with a relay function. For example: for the UE-to-Network Relay, a link between the Relay UE and the Network device is a Uu link (Uu link), a Uu interface is used for a corresponding interface, and a PC5 or a Sidelink interface is used for an interface between the Relay UE and the relayed UE (or referred to as a remote UE). The link between the relay UE and the network device may be referred to as a Backhaul link for the relayed UE, as shown in fig. 3.

For UE-to-UE relay, the link between the relay UE and the remote UE is Sidelink, and the used interfaces are all direct communication interfaces, as shown in fig. 4, the interface used between the relay UE and the remote UE1 is a direct communication interface, and the interface used between the relay UE and the remote UE2 is also a direct communication interface; the link between the relay UE and the remote UE2 may be referred to as a Backhaul link to the remote UE 1.

Whether in a UE-to-Network Relay scenario or a UE-to-UE Relay scenario, the relayed UE needs to select one Relay UE to Relay data to the relayed UE or the Network on the other end. If the link quality is not good, the relayed UE also needs to perform relay UE reselection, so as to select an available relay UE to continue service transmission. The relayed UE needs to obtain the configuration in the cell system information to perform the relevant service, but the relayed UE may not be in the cell coverage area and needs to forward the system information through the relay UE. The relayed UE may need to acquire system information of a specific carrier (e.g., a carrier list of a specific service presence configuration) when the relayed UE selects or reselects.

Specifically, the embodiment of the present invention provides an information transmission method, which solves the problem that the current relay system cannot meet the requirement that the relayed UE may need to acquire the system information of a specific carrier.

As shown in fig. 5, an embodiment of the present invention provides an information transmission method, which is applied to a relay terminal, and the method specifically includes the following steps:

step 51: and sending the target information to the relayed terminal. The target information comprises first frequency point information which can be searched by the relay terminal; or, the target information is used to indicate whether the relay terminal can search the frequency point information required by the relayed terminal.

Optionally, the first frequency point information that can be searched by the relay terminal may be referred to as frequency point information of a target cell, and the relay terminal is in a coverage area of the target cell. The target cell may be a serving cell and/or a non-serving cell of the relay terminal, that is, the first frequency point information may include: frequency point information of a serving cell of the relay terminal; or, the first frequency point information may include: frequency point information of a serving cell of the relay terminal, and frequency point information of a first cell except the serving cell of the relay terminal; wherein the relay terminal is within a coverage of the first cell.

Therefore, the relay terminal can send the frequency point information of the serving cell of the relay terminal to the relayed terminal, and can also send the frequency point information of the non-serving cell where the relay terminal is located to the relayed terminal, so as to ensure that the relayed terminal can select the required frequency point information, thereby ensuring that the relayed terminal can obtain the required system information, and solving the problem that the system information of a specific carrier possibly required by the relayed terminal cannot be obtained in the current relay system.

Optionally, the frequency point information required by the relayed terminal may refer to frequency point information that can be supported by the relayed terminal, and/or refer to frequency point information that is determined to be accessed by the relayed terminal.

In this way, the relay terminal informs the relay terminal whether the frequency point information which can be searched by the current relay terminal meets the frequency point information required by the relay terminal through indicating whether the relay terminal can search the target information of the frequency point information required by the relay terminal, if the target information indicates yes, the relay terminal can be selected or reselected by the relay terminal and is connected with the relay terminal, and if the target information indicates no, the relay terminal can be unselected by the relay terminal; and the scheme can also reduce the overhead of target information transmission.

Optionally, before the step of transmitting the target information to the relayed terminal, the method may include: and acquiring the first frequency point information.

For example: the relay terminal searches the frequency point information of the first cell so as to obtain the first frequency point information; and the relay terminal can search and obtain the frequency point information of the cell in the coverage area of the first cell.

Optionally, target information is sent to the relayed terminal, where the target information includes first frequency point information that can be searched by the relay terminal, that is, the first frequency point information is sent to the relayed terminal. The relay terminal may send the first frequency point information to the relayed terminal, where the frequency point information list may be sent to the relayed terminal, and the frequency point information list includes one or more pieces of frequency point information, that is, the first frequency point information may include one or more pieces of frequency point information.

Optionally, the first frequency point information may be all frequency point information that can be searched by the relay terminal; for example: the relay terminal can search the frequency point information of the nearby cells to obtain the frequency point information of the cells; the relay terminal needs to be within the coverage area of the cell to search for the frequency point information of the cell.

Optionally, the first frequency point information may be frequency point information supporting a direct communication interface.

For example: the relay terminal determines the frequency point information supporting the direct communication interface from the searchable frequency point information, and sends the frequency point information supporting the direct communication interface to the relayed terminal, so as to ensure that the relayed terminal can select the relay terminal to relay data to the relayed terminal or network equipment at the other end, and reduce the overhead during target information transmission to a certain extent.

Optionally, the first frequency point information may be frequency point information searched by the relay terminal on a frequency point supported by the relay terminal.

For example: the relay terminal searches frequency point information of nearby cells on frequency points (bands) supported by the relay terminal: if the relay terminal supports the frequency points band1 and band2, the relay terminal needs to search the frequency point information on the band1 and the band2, and even if the relay terminal is in the coverage range of other frequency points, the relay terminal does not search the frequency point information on other frequency points.

Optionally, the first frequency point information may be frequency point information that is searched by the relay terminal on a frequency point supported by the relay terminal and supports a direct communication interface.

under the condition that the frequency point information which can be searched by the relay terminal is updated, updating the first frequency point information; and sending the updated first frequency point information to the relayed terminal.

For example: under the condition that the position of the relay terminal is changed, the relay terminal may not be in the coverage of the original cell or move to the coverage of other cells, and under the condition, the frequency point information searched by the relay terminal may be changed, and when the frequency point information searched by the relay terminal is changed, the updated frequency point information is sent to the relayed terminal, so that the relayed terminal can select or reselect the relay according to the updated frequency point information.

Optionally, the step of sending the target information to the relayed terminal may specifically include:

wherein the first message comprises: one of a direct link broadcast message (PSBCH), a direct communication interface signaling (PC5-S) message, a Radio Resource Control (RRC) message, a Control Element (CE) of a Medium Access Control (MAC), and direct link Control information (SCI).

Optionally, as an implementation: the step of sending the target information to the relayed terminal may specifically include:

For example: the relay terminal can send the first frequency point information to the relayed terminal in a broadcasting mode. Specifically, a first message may be broadcasted to the relayed terminal, where the first message carries the first frequency point information. If the relay terminal is the target information transmitted by broadcasting, all the relayed terminals near the relay terminal can receive the target information.

Wherein the first message may be: PSBCH message, PC5-S message, RRC message, MAC CE, SCI.

Specifically, the step of sending the target information to the relayed terminal in a broadcast manner may specifically include:

For example: the relay terminal sends the first frequency point information to the relayed terminal in a periodic broadcast mode; specifically, the first message may be periodically broadcast to the relayed terminal, where the first message carries the first frequency point information.

Optionally, in a case that the first frequency point information is sent to the relayed terminal in a broadcast manner, if the frequency point information that can be searched by the relay terminal is updated, the relay terminal may also send the updated frequency point information to the relayed terminal in a broadcast manner, so that the relayed terminal may select or reselect a relay according to the updated frequency point information.

For example: the relay terminal may send target information including an identifier of the relay terminal on the direct communication interface to the relayed terminal by broadcasting (which may be periodically broadcasting). Specifically, the relay terminal may broadcast a first message to the relayed terminal, where the first message carries an identifier of the relay terminal on a direct communication interface.

In this way, the relay terminal may send its identifier on the direct communication interface to the relayed terminal, so that the relayed terminal may determine an accessible relay terminal according to the identifier of the relay terminal on the direct communication interface, so that the relayed terminal may select or reselect a relay.

Optionally, as another implementation: the information transmission method may specifically include:

receiving request information sent by the relayed terminal; wherein, the request information is used to request to establish a connection with the relay terminal, or to search for the relay terminal, such as: the request information is used for requesting to select or reselect the relay, or the request information is used for requesting the relay terminal to send the target information;

The target information may include first frequency point information that can be searched by the relay terminal; or, the target information may be frequency point information used to indicate whether the relay terminal can search for the frequency point information required by the relayed terminal.

Optionally, the step of receiving the request information sent by the relayed terminal may specifically include:

For example: and receiving a second message of the relayed terminal through broadcasting, multicasting or unicasting, wherein the second message carries the request information. Wherein the third message may be: PC5-S message, RRC message, MAC CE, SCI.

Alternatively, if the relayed terminal is the request information transmitted by broadcasting, the relay terminals near the relayed terminal can all receive the request information.

Optionally, if the relayed terminal is the request information sent by multicast, a group of relay terminals near the relayed terminal can receive the request information; for example: the relay terminal capable of supporting a specific service near the relayed terminal can receive the request information.

Optionally, if the relayed terminal is the request information sent by the unicast method, only the corresponding relay terminal may receive the request information.

Optionally, the request information may include: at least one of an identification of the relaying terminal on the direct communication interface and an identification of the relayed terminal on the direct communication interface.

For example: the relay terminal may receive a second message of the relayed terminal through broadcasting, multicasting or unicasting, where the second message carries at least one of an identifier of the relay terminal on the direct communication interface and an identifier of the relayed terminal on the direct communication interface. Wherein the second message may be: PC5-S message, RRC message, MAC CE, SCI.

Optionally, the step of sending the target information to the relayed terminal according to the request information may specifically include:

and sending a third message to the relayed terminal according to the request information, wherein the third message carries the target information. Wherein the third message may be: PC5-S message, RRC message, MAC CE, SCI.

Optionally, the relay terminal sends a third message to the relayed terminal in a broadcast, multicast or unicast manner;

optionally, if the relay terminal is the third message sent by broadcasting, the relayed terminals near the relay terminal can all receive the third message.

Optionally, if the relay terminal is the third message sent by the multicast mode, a group of relayed terminals near the relay terminal can receive the third message; for example: the relayed terminal capable of supporting a specific service in the vicinity of the relay terminal can receive the third message.

Optionally, if the relay terminal is the third message sent by the unicast manner, only the corresponding relayed terminal may receive the third message.

Optionally, the third message may further carry at least one of an identifier of the relaying terminal on the direct communication interface and an identifier of the relayed terminal on the direct communication interface.

Optionally, the request information may include second frequency point information, where the second frequency point information is frequency point information required by the relayed terminal; such as: the second frequency point information may be frequency point information supported by the relayed terminal, and/or frequency point information determined to be accessed by the relayed terminal.

As an implementation: the step of sending the target information to the relayed terminal according to the request information may specifically include:

determining the first frequency point information according to the second frequency point information; wherein the first frequency point information is a subset of the second frequency point information; and sending the first frequency point information to the relayed terminal.

Optionally, after receiving the request information, the relay terminal determines the first frequency point information from the searchable frequency point information of the relay terminal according to the second frequency point information in the request information, and sends the first frequency point information to the relayed terminal; the first frequency point information is a subset of the second frequency point information, which may mean that the first frequency point information is the same as the second frequency point information, or the first frequency point information is contained in the second frequency point information.

For example: if the frequency point information searchable by the relay terminal includes f1, f2, f3, and the second frequency point information includes f3, f4, it is determined that the first frequency point information is f3, that is, it indicates that the relay terminal can search a frequency point supported by the relay terminal or determined to be accessed, or it indicates that the relay terminal can search a frequency point f3 supported by the relay terminal or determined to be accessed, the relay terminal can select the relay terminal to be accessed.

As another implementation: the step of sending the target information to the relayed terminal according to the request information may specifically include:

Optionally, after receiving the request information, the relay terminal determines whether first frequency point information belonging to the second frequency point information subset exists in the searchable frequency point information of the relay terminal according to the second frequency point information in the request information; if the frequency point information exists, determining that the relay terminal can search the frequency point information supported by the relay terminal or determined to be accessed, and sending confirmation information to the relay terminal, wherein the confirmation information is used for indicating that the relay terminal can search the frequency point information supported by the relay terminal or determined to be accessed; if the frequency point information does not exist, determining that the relay terminal can not search the frequency point information supported by the relay terminal or determined to be accessed, and sending the denial information to the relay terminal, wherein the denial information is used for indicating that the relay terminal can not search the frequency point information supported by the relay terminal or determined to be accessed. The fact that the first frequency point information is a subset of the second frequency point information may mean that the first frequency point information is the same as the second frequency point information, or the first frequency point information is included in the second frequency point information.

For example: the relay terminal transmitting the target information to the relayed terminal includes: the relay terminal sends confirmation information to the relayed terminal, or the relay terminal sends non-confirmation information to the relayed terminal. The confirmation information can be 1 bit, when the bit is 1, the confirmation information is represented as 'present', and 'present' indicates that the relay terminal can search a frequency point supported by the relay terminal or determined to be accessed, the relay terminal can select the relay terminal to access; the negative acknowledgement information may be 1 bit, and when the bit is 0, the bit is indicated as "none", and the absence indicates that the relay terminal cannot search a frequency point supported by the relay terminal or determined to be accessed, the relay terminal may not select the relay terminal to access.

In the embodiment of the invention, the relay terminal sends target information to the relayed terminal, wherein the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal, so that the relayed terminal can be ensured to access the required frequency point information, the required system information can be ensured to be obtained, and the problem that the system information of a specific carrier wave which needs to be obtained by the relayed terminal cannot be met in the current relay system is solved.

The information transmission method of the present invention is introduced above, and the following embodiment will further describe the relay terminal corresponding to the information transmission method with reference to the drawings.

Specifically, as shown in fig. 6, an embodiment of the present invention further provides a relay terminal 600, including:

a sending module 610, sending the target information to the relayed terminal; the target information comprises first frequency point information which can be searched by the relay terminal; or, the target information is used to indicate whether the relay terminal can search the frequency point information required by the relayed terminal.

supporting frequency point information of a direct communication interface;

alternatively, the first and second electrodes may be,

Optionally, when the target information includes first frequency point information that can be searched by the relay terminal, the sending module 610 includes:

the updating unit is used for updating the first frequency point information under the condition that the frequency point information which can be searched by the relay terminal is updated;

and the first sending unit is used for sending the updated first frequency point information to the relayed terminal.

Optionally, the sending module 610 includes:

a second sending unit, configured to send a first message to the relayed terminal, where the first message carries the target information;

Optionally, the sending module 610 includes:

and a third transmitting unit, configured to transmit the target information to the relayed terminal in a broadcast manner.

Optionally, the third sending unit is specifically configured to: and sending the target information to the relayed terminal in a periodic broadcast mode.

Optionally, the relay terminal 600 further includes:

the relay device comprises a receiving module, a sending module and a receiving module, wherein the receiving module is used for receiving request information sent by a relayed terminal before sending target information to the relayed terminal; the request information is used for requesting to establish connection with the relay terminal, or the request information is used for requesting to select or reselect a relay, or the request information is used for requesting the relay terminal to send the target information;

the sending module 610 includes:

a fourth sending unit, configured to send the target information to the relayed terminal according to the request information.

Optionally, the receiving module includes:

a receiving unit, configured to receive the request information sent by the relayed terminal in a broadcast, multicast, or unicast manner.

the fourth sending unit is specifically configured to: determining the first frequency point information according to the second frequency point information; wherein the first frequency point information is a subset of the second frequency point information; and sending the first frequency point information to the relayed terminal.

the fourth sending unit is specifically configured to: determining whether the second frequency point information is searched or not according to the second frequency point information; if the second frequency point information can be searched, sending confirmation information to the relayed terminal; and if the second frequency point information can not be searched, transmitting negative acknowledgement information to the relayed terminal.

The embodiment of the relay terminal of the invention is corresponding to the embodiment of the method, all the implementation means in the embodiment of the method are applicable to the embodiment of the relay terminal, and the same technical effect can be achieved.

The relay terminal 600 in the embodiment of the present invention sends target information to the relayed terminal, where the target information includes first frequency point information that can be searched by the relay terminal, or the target information is used to indicate whether the relay terminal can search the frequency point information required by the relayed terminal, so as to ensure that the relayed terminal can access the frequency point information required by the relayed terminal, thereby ensuring that the relayed terminal can obtain required system information, and solving the problem that the current relay system cannot meet the requirement that the relayed terminal needs to obtain system information of a specific carrier.

As shown in fig. 7, an embodiment of the present invention provides a relay terminal, including: a processor 71 and a memory 73 connected to the processor 71 via a bus interface 72, the memory 73 being used for storing programs and data used by the processor 71 in performing operations, and a transceiver 74 connected to the bus interface 72 for receiving and transmitting data under the control of the processor 71. When the processor 71 calls and executes the programs and data stored in the memory 73, the following processes are performed:

transmitting the target information to the relayed terminal; the target information comprises first frequency point information which can be searched by the relay terminal; or, the target information is used to indicate whether the relay terminal can search the frequency point information required by the relayed terminal.

supporting frequency point information of a direct communication interface;

alternatively, the first and second electrodes may be,

the processor implements the following steps when executing the program:

and sending the first frequency point information to the relayed terminal.

the processor implements the following steps when executing the program:

It should be noted that in fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 71 and various circuits of memory represented by memory 73 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 74 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 75 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 71 is responsible for managing the bus architecture and general processing, and the memory 73 may store data used by the processor 71 in performing operations.

The relay terminal in the embodiment of the invention sends target information to the relayed terminal, wherein the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal, so that the relayed terminal can be ensured to access the frequency point information required by the relayed terminal, the relayed terminal can be ensured to obtain the required system information, and the problem that the requirement that the relayed terminal needs to obtain the system information of a specific carrier wave in the current relay system cannot be met is solved.

Those skilled in the art will understand that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program includes instructions for executing part or all of the steps of the above methods; and the program may be stored in a readable storage medium, which may be any form of storage medium.

The embodiment of the present invention further provides a readable storage medium, where a program is stored on the readable storage medium, and when the program is executed by a processor, the program implements each process of the above-mentioned information transmission method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the detailed description is omitted here. The readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

As shown in fig. 8, an embodiment of the present invention further provides an information transmission method, which is applied to a relayed terminal, where the method specifically includes the following steps:

step 81: receiving target information sent by a relay terminal; the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal.

Step 82: and performing relay selection or reselection according to the target information.

Therefore, the relayed terminal can obtain the frequency point information of the serving cell of the relay terminal and also can obtain the frequency point information of the non-serving cell where the relay terminal is located, so that the relayed terminal can select the required frequency point information, the relayed terminal can obtain the required system information, and the problem that the system information of a specific carrier possibly needs to be obtained by the relayed terminal in the current relay system is solved.

In this way, the relayed terminal obtains target information which is sent by the relay terminal and used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal, so as to know whether the frequency point information which can be searched by the current relay terminal meets the frequency point information required by the relayed terminal, if the target information indicates yes, the relayed terminal can select or reselect the relay terminal and establish connection with the relay terminal, and if the target information indicates no, the relayed terminal can not select the relay terminal; and the scheme can also reduce the overhead of target information transmission.

Optionally, the first frequency point information received by the relay terminal and sent by the relay terminal may be a frequency point information list sent by the relay terminal, where the frequency point information list includes one or more pieces of frequency point information, that is, the first frequency point information may include one or more pieces of frequency point information.

Optionally, the step of performing relay selection or reselection according to the target information includes:

under the condition that the first frequency point information contains the frequency point information required by the relayed terminal, selecting or reselecting the relayed terminal; or, under the condition that the target information indicates that the relay terminal can search the frequency point information required by the relayed terminal, selecting or reselecting the relay terminal.

For example: under the condition that a relayed terminal is not accessed to the relay terminal, if the first frequency point information contains frequency point information required by the relayed terminal or the target information indicates that the relay terminal can search the frequency point information required by the relayed terminal, the relay terminal can select the relay terminal and establish connection with the relay terminal, so that service transmission can be carried out through the relay terminal.

The frequency point information required by the relayed terminal contained in the first frequency point information may be that the first frequency point information contains frequency point information supported by the relayed terminal or the first frequency point information contains frequency point information determined to be accessed by the relayed terminal, for example: the first frequency point Information includes a configured frequency or frequency point Information in a frequency list of a System Information Block (SIB)/System Information (SI) in which the relayed UE is interested.

Under the condition that a relayed terminal is accessed to other relay terminals, if the first frequency point information contains frequency point information required by the relayed terminal or the target information indicates that the relay terminal can search the frequency point information required by the relayed terminal, the relay terminal can reselect the relay terminal and establish connection with the relay terminal, so that service transmission can be performed through the reselected relay terminal.

And if the first frequency point information does not contain the frequency point information required by the relayed terminal, or the target information indicates that the relay terminal cannot search the frequency point information required by the relayed terminal, the relay terminal does not select the relay terminal.

Optionally, when the target information includes first frequency point information that can be searched by the relay terminal, the receiving the target information sent by the relay terminal includes:

and receiving the updated first frequency point information sent by the relay terminal.

Optionally, the step of receiving the target information sent by the relay terminal may specifically include:

wherein the first message comprises: PSBCH, PC5-S message, RRC message, MAC CE, SCI.

Optionally, as an implementation: the step of receiving the target information sent by the relay terminal may specifically include:

For example: the relay terminal may send the first frequency point information to the relayed terminal in a broadcast manner, that is, the relayed terminal may receive the first frequency point information sent by the relay terminal in a broadcast manner. Specifically, the relay terminal may broadcast a first message to the relayed terminal, where the first message carries the first frequency point information. Wherein the first message may be: PSBCH message, PC5-S message, RRC message, MAC CE, SCI. If the relay terminal is the target information transmitted by broadcasting, all the relayed terminals near the relay terminal can receive the target information.

Specifically, the step of receiving the target information sent by the relay terminal in a broadcast manner may specifically include:

and receiving the target information sent by the relay terminal in a periodic broadcast mode.

For example: the relay terminal sends the first frequency point information to the relayed terminal in a periodic broadcast mode, namely the relayed terminal can receive the first frequency point information sent by the relay terminal in the periodic broadcast mode; specifically, the relay terminal may periodically broadcast the first message to the relayed terminal, where the first message carries the first frequency point information.

Optionally, in a case that the relay terminal sends the first frequency point information to the relayed terminal in a broadcast manner, if the frequency point information that can be searched by the relay terminal is updated, the relay terminal may also send the updated frequency point information to the relayed terminal in a broadcast manner, so that the relayed terminal may select or reselect a relay according to the updated frequency point information.

For example: the relay terminal may send, by way of broadcast (which may be periodic broadcast), target information including an identifier of the relay terminal on the direct communication interface to the relayed terminal, that is, the relayed terminal may receive, by way of broadcast, target information including an identifier of the relay terminal on the direct communication interface, where the target information is sent by the relay terminal. Specifically, the relay terminal may broadcast a first message to the relayed terminal, where the first message carries an identifier of the relay terminal on the direct communication interface.

In this way, the relayed terminal can receive the identifier of the relay terminal on the direct communication interface sent by the relay terminal, so as to determine the accessible relay terminal according to the identifier of the relay terminal on the direct communication interface, thereby facilitating the selection or reselection of the relay.

sending request information to the relay terminal; the request information is used for requesting to establish connection with the relay terminal, or the request information is used for requesting to select or reselect a relay, or the request information is used for requesting the relay terminal to send the target information.

Optionally, the step of sending the request information to the relay terminal may specifically include:

sending a second message to the relay terminal, wherein the second message carries the request information; wherein the second message comprises: PC5-S message, RRC message, MAC CE, SCI.

For example: and the relayed terminal broadcasts, multicasts or unicasts a second message to the relay terminal, wherein the third message carries the request information. Wherein the second message may be: PC5-S message, RRC message, MAC CE, SCI.

For example: the relayed terminal may send a second message to the relay terminal by broadcasting, multicasting or unicasting, where the second message carries at least one of an identifier of the relay terminal on the direct communication interface and an identifier of the relayed terminal on the direct communication interface. Wherein the second message may be: PC5-S message, RRC message, MAC CE, SCI.

Optionally, the step of receiving the target information sent by the relay terminal according to the request information may specifically include:

and receiving a third message sent by the relay terminal according to the request message, wherein the third message carries the target information. Wherein the third message may be: PC5-S message, RRC message, MAC CE, SCI.

Optionally, the relayed terminal receives a third message sent by the relay terminal in a broadcast, multicast or unicast manner;

Optionally, the request information includes second frequency point information, where the second frequency point information is frequency point information required by the relayed terminal; such as: the second frequency point information may be frequency point information supported by the relayed terminal, and/or frequency point information determined to be accessed by the relayed terminal. Wherein the first frequency point information is a subset of the second frequency point information.

As another implementation: the step of receiving the target information sent by the relay terminal according to the request information may specifically include:

and receiving confirmation information sent by the relay terminal according to the request information or receiving denial information sent by the relay terminal according to the request information.

For example: the confirmation information can be 1 bit, when the bit is 1, the confirmation information is represented as 'present', and 'present' indicates that the relay terminal can search a frequency point supported by the relay terminal or determined to be accessed, the relay terminal can select the relay terminal to access; the negative acknowledgement information may be 1 bit, and when the bit is 0, the bit is indicated as "none", and the absence indicates that the relay terminal cannot search a frequency point supported by the relay terminal or determined to be accessed, the relay terminal may not select the relay terminal to access.

In the embodiment of the invention, the relayed terminal receives the target information sent by the relay terminal; the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal; and performing relay selection or reselection according to the target information to ensure that the relayed terminal can access the required frequency point information, thereby ensuring that the relayed terminal can acquire the required system information and solving the problem that the current relay system cannot meet the requirement that the relayed terminal needs to acquire the system information of the specific carrier.

The information transmission method of the present invention is introduced above, and the following embodiment will further describe its corresponding relayed terminal with reference to the accompanying drawings.

Specifically, as shown in fig. 9, an embodiment of the present invention further provides a relay terminal 900, including:

a receiving module 910, configured to receive target information sent by a relay terminal; the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal;

the processing module 920 is configured to perform relay selection or reselection according to the target information.

Optionally, the processing module 920 includes:

a first processing unit, configured to select or reselect the relay terminal when the first frequency point information includes frequency point information required by the relay terminal;

and the second processing unit is used for selecting or reselecting the relay terminal under the condition that the target information indicates that the relay terminal can search the frequency point information required by the relayed terminal.

Optionally, the receiving module 910 includes:

a first receiving unit, configured to receive a first message sent by the relay terminal, where the first message carries the target information;

Optionally, the receiving module 910 includes:

and the second receiving unit is used for receiving the target information sent by the relay terminal in a broadcasting mode.

Optionally, the relayed terminal 900 further includes:

the system comprises a sending module, a receiving module and a sending module, wherein the sending module is used for sending request information to a relay terminal before receiving target information sent by the relay terminal; the request information is used for requesting to establish connection with the relay terminal, or the request information is used for requesting to select or reselect a relay, or the request information is used for requesting the relay terminal to send the target information;

the receiving module 910 includes:

and a third receiving unit, configured to receive the target information sent by the relay terminal according to the request information.

Optionally, the sending module includes:

and the first sending unit is used for sending the request information to the relay terminal in a broadcasting, multicasting or unicasting mode.

Optionally, the request information includes second frequency point information, where the second frequency point information is frequency point information required by the relayed terminal; wherein the first frequency point information is a subset of the second frequency point information.

Optionally, the sending module includes:

a second sending unit, configured to send a second message to the relay terminal, where the second message carries the request information; wherein the second message comprises: PC5-S message, RRC message, MAC CE, SCI.

The embodiment of the relayed terminal of the invention is corresponding to the embodiment of the method, all the implementation means in the embodiment of the method are applicable to the embodiment of the relayed terminal, and the same technical effect can be achieved.

The relayed terminal 900 in the embodiment of the present invention receives the target information transmitted by the relay terminal; the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal; and performing relay selection or reselection according to the target information to ensure that the relayed terminal can access the required frequency point information, thereby ensuring that the relayed terminal can acquire the required system information and solving the problem that the current relay system cannot meet the requirement that the relayed terminal needs to acquire the system information of the specific carrier.

As shown in fig. 10, the present embodiment provides a relay terminal including: a processor 101 and a memory 103 connected to the processor 101 through a bus interface 102, the memory 103 being used for storing programs and data used by the processor 101 when performing operations, and a transceiver 104 connected to the bus interface 102 for receiving and transmitting data under the control of the processor 101. When the processor 101 calls and executes the programs and data stored in the memory 103, the following processes are performed:

receiving target information sent by a relay terminal; the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal; and performing relay selection or reselection according to the target information.

wherein the second message comprises: PC5-S message, RRC message, MAC CE, SCI.

It should be noted that in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 101 and various circuits of memory represented by memory 103 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 104 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 105 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 101 is responsible for managing the bus architecture and general processing, and the memory 103 may store data used by the processor 101 in performing operations.

The relayed terminal in the embodiment of the invention receives the target information sent by the relay terminal; the target information comprises first frequency point information which can be searched by the relay terminal, or the target information is used for indicating whether the relay terminal can search the frequency point information required by the relayed terminal; and performing relay selection or reselection according to the target information to ensure that the relayed terminal can access the required frequency point information, thereby ensuring that the relayed terminal can acquire the required system information and solving the problem that the current relay system cannot meet the requirement that the relayed terminal needs to acquire the system information of the specific carrier.

The following describes an interaction process between the relay terminal and the relayed terminal with reference to a specific example:

example one:

as shown in fig. 11, the relay UE broadcasts the first frequency point information to facilitate relay selection or reselection by the relay UE.

Step 1: the relay UE acquires first frequency point information; such as: and the relay UE searches the frequency point information of the nearby cells to obtain the frequency point information of the cells.

Step 2: and the relay UE broadcasts the first frequency point information.

The first frequency point information may be a frequency point information list obtained by the relay UE through search, that is, the first frequency point information may include one or more pieces of frequency point information. Optionally, the one or more pieces of frequency point information may be updated according to the frequency point information searched by the relay UE; for example: if the location of the relay UE changes, the relay UE may not be in the coverage of the original cell or move to the coverage of another cell, so that the frequency point information searched by the relay UE may change, and the broadcasted frequency point information also needs to be updated.

Optionally, the relay UE may broadcast the first frequency point information using one of the following messages: PSBCH; a PC5-S message; an RRC message; MAC CE; SCI.

Optionally, the relay UE broadcasts the first frequency point information periodically.

Optionally, when the relay UE broadcasts the first frequency point information, the relay UE may also carry an identifier of the relay UE on a direct communication interface.

And step 3: and the relayed UE receives the first frequency point information (such as the first frequency point information broadcast by the relay UE) sent by the relay UE, and performs relay selection or reselection.

Optionally, if the one or more pieces of frequency point information, that is, the first frequency point information includes the frequency point information in the configured frequency or frequency list of the SIB/SI that is interested by the relayed UE, the relayed UE selects the relayed UE, establishes a connection with the relayed UE, and performs service transmission; and if the first frequency point information does not comprise the configuration frequency of the SIB/SI which is interested by the relay UE or the frequency point information in the frequency list, not selecting the relay UE for service transmission.

Example two:

as shown in fig. 12, the relay UE receives information sent by a relayed UE, and the relay UE sends first frequency point information to the relayed UE, or the relay UE sends acknowledgement/negative acknowledgement information to the relayed UE, so as to facilitate relay selection or reselection by the relayed UE.

Step 2: the relay UE receives request information sent by the relay UE. The request information sent by the relayed UE may be information that the relayed UE requests to establish a connection, or information that the relayed UE seeks the relay UE.

Optionally, the relay UE receives the request information sent by the relay UE in a broadcast, multicast or unicast manner. Wherein, if the relayed UE is the request information sent in a broadcast mode, the relay UE near the relayed UE can receive the request information; if the relayed UE is the request message sent by multicast, a group of relay UEs near the relayed UE can receive the request message, for example: the relay UE which can support a specific service can receive the service; if the relayed UE is the request information transmitted in unicast, only the corresponding relay UE can receive the request information.

Optionally, the relayed UE may send the request information using one of the following messages: a PC5-S message; an RRC message; MAC CE; SCI.

Optionally, the request message sent by the relayed UE may further include: an identification of the relaying UE on a direct communication interface, and/or an identification of the relayed UE on a direct communication interface.

And step 3: and after receiving the information sent by the relayed UE, the relay UE sends the first frequency point information to the relayed UE, or sends confirmation/non-confirmation information to the relayed UE.

The confirmation information is used for indicating that the relay UE can search the frequency point information required by the relayed UE; the negative acknowledgement information is used for indicating that the relay UE cannot search the frequency point information required by the relayed UE.

Optionally, the relay UE may send the first frequency point information or the ack/nack information using one of the following messages: a PC5-S message; an RRC message; MAC CE; SCI.

Optionally, the message may also carry an identifier of the relay UE on a direct communication interface, and/or an identifier of the relayed UE on the direct communication interface.

And 4, step 4: the relayed UE receives the first frequency point information sent by the relay UE; if the one or more pieces of frequency point information, namely the first frequency point information includes the frequency point information in the configuration frequency or the frequency list of the SIB/SI which is interested by the relayed UE, the relayed UE selects the relayed UE, establishes connection with the relayed UE and transmits the service; and if the configuration frequency of the SIB/SI which is interested by the relay UE or the frequency point information in the frequency list is not included, the relay UE is not selected for service transmission.

The relayed UE receives the acknowledgement/negative acknowledgement information sent by the relay UE; if the relayed UE receives the confirmation information sent by the relay UE, the confirmation information indicates that the relay UE can search the configuration frequency of the SIB/SI which is interested by the relayed UE or the frequency point information in the frequency list, and the relayed UE selects the relay UE, establishes connection with the relay UE and carries out service transmission; and if the relayed UE receives the negative confirmation information sent by the relay UE, the negative confirmation information indicates that the relay UE cannot search the configuration frequency or the frequency point information in the frequency list of the SIB/SI which is interested by the relayed UE, and the relay UE is not selected for service transmission.

Further, it is noted that in the terminal and method of the present invention, it is apparent that each component or each step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An information transmission method is applied to a relay terminal, and the method comprises the following steps:

transmitting the target information to the relayed terminal;

2. The information transmission method according to claim 1, wherein the first frequency point information is at least one of:

supporting frequency point information of a direct communication interface;

3. The information transmission method according to claim 1, wherein the first frequency point information includes: frequency point information of a serving cell of the relay terminal;

alternatively, the first and second electrodes may be,

4. The information transmission method according to claim 1, wherein the sending the target information to the relayed terminal when the target information includes first frequency point information that can be searched by the relay terminal, includes:

5. The information transmission method according to claim 1, wherein the sending target information to the relayed terminal includes:

6. The information transmission method according to claim 1, wherein the sending target information to the relayed terminal includes:

7. The information transmission method according to claim 6, wherein the transmitting the target information to the relayed terminal by broadcasting comprises:

8. The information transmission method according to claim 1, wherein the destination information further includes an identification of the relay terminal on a direct communication interface.

9. The information transmission method according to claim 1, wherein before the sending the destination information to the relayed terminal, the method further comprises:

the sending target information to the relayed terminal includes:

10. The information transmission method according to claim 9, wherein the receiving the request information transmitted by the relayed terminal includes:

11. The information transmission method according to claim 9, wherein the request information includes second frequency point information, and the second frequency point information is frequency point information required by the relayed terminal;

and sending the first frequency point information to the relayed terminal.

12. The information transmission method according to claim 9, wherein the request information includes second frequency point information, and the second frequency point information is frequency point information required by the relayed terminal;

13. The information transmission method according to claim 9, wherein the destination information further includes at least one of an identification of the relay terminal on the direct communication interface and an identification of the relayed terminal on the direct communication interface.

14. A relay terminal, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

transmitting the target information to the relayed terminal;

15. The relay terminal according to claim 14, wherein the first frequency point information is at least one of:

supporting frequency point information of a direct communication interface;

16. The relay terminal according to claim 14, wherein the first frequency point information includes: frequency point information of a serving cell of the relay terminal;

alternatively, the first and second electrodes may be,

17. The relay terminal according to claim 14, wherein when the target information includes first frequency point information that can be searched by the relay terminal, the processor implements the following steps when executing the program:

18. The relay terminal of claim 14, wherein the destination information further comprises an identification of the relay terminal on a direct communication interface.

19. The relay terminal of claim 14, wherein the processor, when executing the program, performs the steps of:

20. The relay terminal according to claim 19, wherein the request information includes second frequency point information, and the second frequency point information is frequency point information required by the relayed terminal;

the processor implements the following steps when executing the program:

and sending the first frequency point information to the relayed terminal.

21. The relay terminal according to claim 19, wherein the request information includes second frequency point information, and the second frequency point information is frequency point information required by the relayed terminal;

the processor implements the following steps when executing the program:

22. The relay terminal of claim 19, wherein the destination information further comprises at least one of an identification of the relay terminal on the direct communication interface and an identification of the relayed terminal on the direct communication interface.

23. A relay terminal, comprising:

24. An information transmission method applied to a relayed terminal, the method comprising:

25. The information transmission method according to claim 24, wherein the performing relay selection or reselection according to the target information comprises:

alternatively, the first and second electrodes may be,

26. The information transmission method according to claim 24, wherein the receiving the destination information transmitted by the relay terminal includes:

27. The information transmission method according to claim 24, wherein the receiving the destination information transmitted by the relay terminal includes:

28. The information transmission method according to claim 24, wherein the destination information further includes an identification of the relay terminal on a direct communication interface.

29. The information transmission method according to claim 24, wherein before receiving the destination information transmitted by the relay terminal, the method further comprises:

the receiving of the target information sent by the relay terminal includes:

30. The information transmission method according to claim 29, wherein the sending the request information to the relay terminal includes:

31. The information transmission method according to claim 29, wherein the request information includes second frequency point information, and the second frequency point information is frequency point information required by the relayed terminal;

32. The information transmission method according to claim 29, wherein the sending the request information to the relay terminal includes:

wherein the second message comprises: PC5-S message, RRC message, MAC CE, SCI.

33. The information transmission method according to claim 29, wherein the request information includes at least one of an identification of the relaying terminal on a direct communication interface and an identification of the relayed terminal on a direct communication interface.

34. A relayed terminal comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

35. The relayed terminal of claim 34, wherein the processor, when executing the program, performs the steps of:

alternatively, the first and second electrodes may be,

36. The relayed terminal of claim 34, wherein the destination information further comprises an identification of the relay terminal on a direct communication interface.

37. The relayed terminal of claim 34, wherein the processor, when executing the program, performs the steps of:

38. The relayed terminal of claim 37, wherein the request information includes second frequency point information, and the second frequency point information is frequency point information required by the relayed terminal;

39. The relayed terminal of claim 37, wherein the request information comprises at least one of an identification of the relay terminal on a direct communication interface and an identification of the relayed terminal on a direct communication interface.

40. A relayed terminal, comprising:

41. A readable storage medium on which a program is stored, the program realizing the steps of the information transmission method according to any one of claims 1 to 13, 24 to 33 when executed by a processor.