CN115333687A

CN115333687A - System information transmitting method, receiving method, terminal and storage medium

Info

Publication number: CN115333687A
Application number: CN202110506379.3A
Authority: CN
Inventors: 张惠英; 赵亚利
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-11-11
Anticipated expiration: 2041-05-10
Also published as: CN115333687B

Abstract

The invention provides a system information sending method, a system information receiving method, a terminal and a storage medium, wherein the method comprises the following steps: and the relay terminal sends system information of a direct communication link on the SL-SCH, wherein at least one of a MAC header and an SCI corresponding to the SL-SCH comprises indication information, and the indication information is used for indicating that a MAC PDU carried by the SL-SCH contains the system information. The invention can improve the transmission performance of system information.

Description

System information transmitting method, receiving method, terminal and storage medium

Technical Field

The present invention relates to a wireless communication system, and more particularly, to a system information transmitting method, receiving method, terminal, and storage medium.

Background

In some communication systems (for example, 5G systems), a terminal-to-Network Relay (UE-to-Network Relay) technology is introduced, in the UE-to-Network Relay technology, a Uu interface is used between a Relay terminal and a Network, a direct communication interface (PC 5) is used between the Relay terminal and a remote terminal, and a link between the Relay terminal and the Network may be referred to as a Backhaul link (BH) for the remote terminal. However, in the current communication system, the network is often only supported to send the system information to the terminal through the Uu interface, so that the transmission performance of the system information is poor.

Disclosure of Invention

The embodiment of the invention provides a system information sending method, a system information receiving method, a terminal and a storage medium, which aim to solve the problem of poor system information transmission performance.

The embodiment of the invention provides a method for sending system information, which comprises the following steps:

the relay terminal sends direct communication link system Information on a direct communication link Shared Channel (SL-SCH), wherein at least one of a Medium Access Control (MAC) header and physical layer direct communication link Control Information (SCI) corresponding to the SL-SCH includes indication Information, and the indication Information is used for indicating that a Medium Access Control Protocol Data Unit (MAC PDU) carried by the SL-SCH includes system Information.

Optionally, the indication information includes at least one of:

a first indication of a medium access control, MAC, subheader, a Logical Channel Identifier (LCID), a target ID.

Optionally, the LCID is a first preset value, and the first preset value is predefined and is used to indicate that the MAC PDU carried by the SL-SCH includes system information.

Optionally, the target ID is a second preset value, where the second preset value is predefined and is used to indicate that the MAC PDU carried by the SL-SCH includes system information.

Optionally, the first part of bits of the target ID is carried in the SCI, and the second part of bits of the target ID is carried in the MAC header.

Optionally, the SCI includes a first SCI of a physical layer or a second SCI of the physical layer.

Optionally, the LCID in the SL-SCH is a third preset value, where the third preset value is a predefined fixed value, and is used to indicate that a Medium Access Control Service Data Unit (MAC SDU) of the SL-SCH carries a Control plane radio bearer corresponding to the direct communication system information.

Optionally, the first indication of the MAC subheader includes at least one of:

a first domain indication of a first MAC subheader, a second domain indication of the first MAC subheader, and a third domain indication in a second MAC subheader;

wherein the first MAC subheader is a subheader pre-designated in the SL-SCH, the second MAC subheader is a newly defined subheader in the SL-SCH, the first domain indication is a domain pre-designated in the first MAC subheader, and the second domain indication is a domain newly defined by the first MAC subheader.

Optionally, the first domain indication is a V domain pre-specified in the first MAC subheader.

Optionally, the indication information indicates that the MAC PDU carried on the SL-SCH includes system information under the condition of a first indication state, and indicates that the MAC PDU not carried on the SL-SCH includes system information under the condition of a second indication state.

Optionally, the indication information corresponds to a plurality of indication states, and the plurality of indication states respectively correspond to a plurality of system information types;

and under the condition that the indication information is in a target indication state, the indication information is used for indicating target system information carried by the SL-SCH, and the target system information is a system information type corresponding to the target indication state.

The embodiment of the invention also provides a system information receiving method, which comprises the following steps:

a remote terminal receives a direct communication link shared channel (SL-SCH), wherein a Media Access Control (MAC) PDU carried by the SL-SCH contains system information of the direct communication link, and at least one item of indication information is included in a Media Access Control (MAC) header and physical layer direct communication link control information (SCI) corresponding to the SL-SCH, and the indication information is used for indicating that the MAC PDU carried by the SL-SCH contains the system information;

and the remote terminal acquires the direct communication link system information according to the indication information.

Optionally, the indication information includes at least one of:

a first indication of a media access control, MAC, subheader, a logical channel identity, LCID, a target ID.

Optionally, the LCID in the SL-SCH is a third preset value, where the third preset value is a predefined fixed value, and is used to indicate that a medium access control service data unit MAC SDU of the SL-SCH carries a control plane radio bearer corresponding to the direct communication system information.

Optionally, the first indication of the MAC subheader includes at least one of:

Optionally, the indication information indicates that the MAC PDU carried by the SL-SCH includes system information under the condition of a first indication state, and the indication information indicates that the MAC PDU carried by the SL-SCH does not include system information under the condition of a second indication state.

when the indication information is in a target indication state, the indication information is used for indicating target system information carried by the SL-SCH, and the target system information is a system information type corresponding to the target indication state;

the remote terminal acquires the system information according to the indication information, and the method comprises the following steps:

and the remote terminal acquires the target system information under the condition that the target system information is determined to be the system information required by the remote terminal according to the indication information.

An embodiment of the present invention further provides a relay terminal, including: a memory, a transceiver, and a processor, wherein:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

and sending direct communication link system information on a direct communication link shared channel (SL-SCH), wherein at least one of a Media Access Control (MAC) header and physical layer direct communication link control information (SCI) corresponding to the SL-SCH comprises indication information, and the indication information is used for indicating that a MAC PDU carried by the SL-SCH contains system information.

Optionally, the indication information includes at least one of:

Optionally, the first indication of the MAC subheader includes at least one of:

An embodiment of the present invention further provides a remote terminal, which includes: a memory, a transceiver, and a processor, wherein:

receiving a direct communication link shared channel (SL-SCH), wherein a Media Access Control (MAC) PDU carried by the SL-SCH contains system information of the direct communication link, and at least one of a Media Access Control (MAC) header and physical layer direct communication link control information (SCI) corresponding to the SL-SCH comprises indication information, wherein the indication information is used for indicating that the MAC PDU carried by the SL-SCH contains the system information;

and acquiring the system information of the direct communication link according to the indication information.

Optionally, the indication information includes at least one of:

Optionally, the first indication of the MAC subheader includes at least one of:

An embodiment of the present invention further provides a relay terminal, including:

a sending unit, configured to send direct communication link system information on a direct communication link shared channel SL-SCH, where at least one of a medium access control MAC header and physical layer direct communication link control information SCI corresponding to the SL-SCH includes indication information, and the indication information is used to indicate that a MAC PDU carried by the SL-SCH includes system information.

Optionally, the indication information includes at least one of:

An embodiment of the present invention further provides a remote terminal, including:

a receiving unit, configured to receive a direct communication link shared channel SL-SCH, where a MAC PDU carried by the SL-SCH includes direct communication link system information, and at least one of a media access control MAC header and physical layer direct communication link control information SCI corresponding to the SL-SCH includes indication information, where the indication information is used to indicate that the MAC PDU carried by the SL-SCH includes system information;

and the response unit is used for acquiring the direct communication link system information according to the indication information.

Optionally, the indication information includes at least one of the following:

The embodiment of the present invention further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, where the computer program is configured to enable the processor to execute the method for sending system information provided in the embodiment of the present invention, or the computer program is configured to enable the processor to execute the method for receiving system information provided in the embodiment of the present invention.

In the embodiment of the invention, a relay terminal sends system information of a direct communication link on an SL-SCH, wherein at least one item of a MAC header and an SCI corresponding to the SL-SCH comprises indication information, and the indication information is used for indicating that a MAC PDU carried by the SL-SCH contains the system information. Therefore, the relay terminal can be supported to send the system information of the direct communication link on the SL-SCH, and the transmission performance of the system information is improved.

Drawings

FIG. 1 is a schematic diagram of a network architecture in which the present invention is applicable;

fig. 2 is a flowchart of a method for sending system information according to an embodiment of the present invention;

fig. 3 is a flowchart of a method for receiving system information according to an embodiment of the present invention;

fig. 4 is a structural diagram of a relay terminal according to an embodiment of the present invention;

fig. 5 is a structural diagram of a remote terminal according to an embodiment of the present invention;

fig. 6 is a structural diagram of another relay terminal according to an embodiment of the present invention;

fig. 7 is a block diagram of another remote terminal according to an 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 embodiment of the present invention, the term "and/or" describes an association relationship of an associated object, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The term "plurality" in the embodiments of the present invention means two or more, and other terms are similar thereto.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

The technical scheme provided by the embodiment of the invention can be suitable for various systems, particularly 6G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an LTE-a (long term evolution) system, a universal mobile system (universal mobile telecommunications system, UMTS), a universal internet Access (WiMAX) system, a New Radio Access (WiMAX) system, a Radio Access (NR 5, new NR 6, etc. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5 GS), and the like.

Referring to fig. 1, fig. 1 is a schematic diagram of a network structure to which the embodiment of the present invention is applicable, and as shown in fig. 1, the network structure includes a relay terminal 11, a remote terminal 12 and a network device 13, where the relay terminal 11 and the remote terminal 12 may be User Equipment (UE) or other terminal devices, for example: terminal side devices such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), it should be noted that the embodiment of the present invention does not limit the specific type of the terminal.

The direct communication link between the relay terminal 11 and the remote terminal 12 is called a Sidelink (translated into a direct communication link or a bypass, also called a direct communication interface or a direct link interface), that is, the relay terminal 11 and the remote terminal 12 can perform direct communication through the Sidelink. In addition, the connection relationship between the remote terminal 12 and the network device may or may not be established, that is, the remote terminal 12 may or may not be on the network.

Network device 12 may be a base station that may include multiple cells that serve terminals. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to exchange received air frames and Internet Protocol (IP) packets with one another as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communications network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present invention may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), may be a network device (NodeB) in a Wide-band Code Division Multiple Access (WCDMA), may be an evolved Node B (eNB) or an e-NodeB) in a Long Term Evolution (LTE) System, may be a Base Station (gNB) in a 5G network architecture (next generation System), may be a Home evolved Node B (Home evolved Node B, nodeB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico), and the like. In some network architectures, a network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

Multiple Input Multiple Output (MIMO) transmission may be performed between the network device and the terminal by using one or more antennas, where the MIMO transmission may be Single User MIMO (SU-MIMO) or Multi-User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of root antenna combinations.

Referring to fig. 2, fig. 2 is a flowchart of a method for sending system information according to an embodiment of the present invention, as shown in fig. 2, including the following steps:

step 201, the relay terminal sends system information of a direct communication link on an SL-SCH, wherein at least one of a MAC header and a physical layer SCI corresponding to the SL-SCH includes indication information, and the indication information is used to indicate that a MAC PDU carried by the SL-SCH includes the system information.

The relay terminal may transmit the direct communication link system information on the SL-SCH, and the relay terminal may include the direct communication link system information on the SL-SCH transmitted to the remote terminal.

The MAC header corresponding to the SL-SCH may be a MAC subheader of the SL-SCH.

The physical layer SCI corresponding to the SL-SCH may be a same set of signals as the SL-SCH, for example: for unicast, the lower 8 bits of the source UE identity (i.e. the identity of the relay terminal) and the lower 16 bits of the target UE identity (i.e. the identity of the remote terminal) are carried in the physical layer SCI, and the upper 16 bits of the source UE identity and the upper 8 bits of the target UE identity are carried in the header of the SL-SCH at the MAC layer; for multicast, the lower 8 bits of the source UE identity and the lower 16 bits of the group identity are carried in the physical layer SCI, and the upper 16 bits of the source UE identity and the upper 8 bits of the group identity are carried in the header of the SL-SCH on the MAC layer; for broadcast, the lower 8 bits of the source UE identity and the lower 16 bits of the broadcast information identity are carried in the physical layer SCI, and the upper 16 bits of the source UE identity and the upper 8 bits of the broadcast information identity are carried in the header of the above-mentioned SL-SCH at the MAC layer. It should be noted that, in the embodiment of the present invention, the correspondence between the SL-SCH and the physical layer SCI is not limited, and specifically, the correspondence between the SL-SCH and the physical layer SCI defined in the protocol may be used.

The indication information may indicate, in an explicit manner, that the MAC PDU carried by the SL-SCH includes system information, so that after receiving the indication information, the remote terminal may determine whether the MAC PDU carried by the SL-SCH includes system information according to the indication information, thereby performing a corresponding receiving operation.

In this embodiment of the present invention, the system information of the direct communication link sent by the relay terminal on the SL-SCH may be system information sent by a forwarding network device, for example: a Master Information Block (MIB), a System Information Block (SIB) 1, and a direct communication related SIB. And the above-mentioned data can be sent to the far-end terminal by means of unicast, broadcast or multicast. For example: the relay terminal may encapsulate system information of the Uu interface in a MAC SDU at the MAC layer, and set a source field (SRC field) in a MAC subheader of the SL-SCH as the high 16 bits of the L2 ID of the relay terminal, set a target field (DST field) in the MAC subheader of the SL-SCH as all zeros or any value if the relay terminal transmits the system information in a broadcast manner, and set the DST field in the MAC subheader of the SL-SCH as the high 8 bits of the L2 ID of the remote terminal if the relay terminal transmits the system information in a unicast manner.

It should be further noted that, in the embodiment of the present invention, for an SL-SCH that does not transmit the system information of the direct communication link, the indication information corresponding to the SL-SCH may indicate that a MAC PDU not carried by the SL-SCH includes system information.

In the embodiment of the invention, the relay terminal can be supported to send the system information of the direct communication link on the SL-SCH through the steps, thereby improving the transmission performance of the system information.

As an optional implementation, the indication information includes at least one of the following:

a first indication of a MAC subheader, a logical channel identification LCID, a destination ID.

The MAC subheader is a MAC subheader defined in a protocol, or the MAC subheader may be a MAC subheader newly defined in an embodiment of the present invention.

For example: the first indication of the MAC subheader comprises at least one of:

The pre-designated subheader may be a subheader defined by a protocol in the SL-SCH, and the domain pre-designated in the first MAC subheader may be a domain defined by a protocol in the first MAC subheader.

In this embodiment, it can be realized that the MAC PDU carried by the SL-SCH includes system information through the MAC subheader defined in the SL-SCH or the indication field defined in the MAC subheader, and also can indicate the MAC PDU carried by the SL-SCH to include system information through the indication field newly defined in the MAC subheader defined, or indicate the MAC PDU carried by the SL-SCH to include system information through the MAC subheader newly defined, thereby improving the flexibility of indication to adapt to different service and scene requirements.

Wherein, the V field is a version field in the MAC subheader.

In this embodiment, since the first field is indicated as a V field defined for the first MAC subheader in the protocol, it is possible to avoid changing the format of the MAC subheader, thereby reducing complexity.

The LCID may correspond to a plurality of values, where different values may indicate different contents, and the LCID indicates that the MAC PDU carried by the SL-SCH includes system information when the LCID value is a specific value.

For example: the LCID is a first preset value, and the first preset value is predefined and is used for indicating that the MAC PDU carried by the SL-SCH contains system information.

The first preset value may be defined by a protocol, or defined and configured to the terminal by the network side device. Thus, when the system information of the direct communication link is sent in the SL-SCH, the value of the LCID is a first preset value so as to indicate that the MAC PDU carried by the SL-SCH contains the system information.

In the embodiment, since the MAC PDU carried by the SL-SCH is indicated to contain system information through the LCID, the format of the SL-SCH is not changed, and the complexity is reduced.

The target ID may correspond to a plurality of values, and in the embodiment of the present invention, the target ID is configured to be a specific value, so as to indicate that the MAC PDU carried by the SL-SCH includes system information.

For example: the target ID is a second preset value, and the second preset value is predefined and is used for indicating that the MAC PDU carried by the SL-SCH contains system information.

In the embodiment, since the MAC PDU carried by the SL-SCH is indicated to contain system information through the target ID, the format of the SL-SCH is not changed, and the complexity is reduced. In addition, when the remote terminal receives the SL-SCH, the remote terminal does not use the target ID of the SL-SCH for filtering, but determines whether the MAC PDU carried by the SL-SCH contains system information or not according to the target ID.

The first partial bits and the second partial bits may be predefined bits, for example: the lower 16 bits of the target ID are carried in the SCI of the physical layer and the upper 8 bits are carried in the SL-SCH MAC subheader.

In the embodiment of the present invention, the target ID may also be referred to as a target L2 ID.

As an alternative embodiment, the SCI includes a first SCI of a physical layer or a second SCI of the physical layer.

Wherein the first SCI and the second SCI are defined as the first SCI (1) in the protocol ^st -stage SCI) and second SCI (2) ^nd -stage SCI)。

In this embodiment, the indication information can be sent through different SCIs, so as to further improve the flexibility of sending the indication information, and meet the requirements of different services and scenes.

As an optional implementation manner, when the indication information includes the target ID, or the SCI includes the indication information, the LCID in the SL-SCH is a third preset value, where the third preset value is a predefined fixed value, and is used to indicate that a MAC SDU of the SL-SCH carries a control plane radio bearer corresponding to the direct communication system information.

The fixed value may be defined by a protocol or configured by a network side.

In this embodiment, when the MAC PDU loaded on the SL-SCH is indicated by the target ID and the SCI to include system information, the LCID is further indicated to indicate that the MAC SDU of the SL-SCH is loaded on a control plane radio bearer corresponding to direct communication system information, so that the terminal can more easily acquire the system information loaded on the SL-SCH, and the SL-SCH is prevented from being filtered out by the terminal due to the value of the LCID, thereby improving the transmission reliability of the system information.

As an optional implementation manner, in the case of a first indication state, the indication information indicates that the MAC PDU carried by the SL-SCH includes system information, and in the case of a second indication state, the indication information indicates that the MAC PDU carried by the SL-SCH does not include system information.

The first indication state and the second indication state may be two different values of the indication information, and a specific value may be agreed by a protocol or configured by a network side. The remote terminal can accurately determine whether the MAC PDU carried by the SL-SCH contains system information or not through the indication state of the indication information.

For example: when the V field in the SL-SCH is used as the indication information, the meaning of the corresponding value of the V field may be as shown in table 1:

table 1:

when the value of the V domain is 0001, the MAC PDU carried by the SL-SCH is indicated to contain system information, and specifically, the MAC SDU carried by the SL-SCH may be indicated to contain system information.

Another example is: when the LCID field of the MAC subheader in the SL-SCH is used as the indication information, the values corresponding to the LCID field may be as shown in table 2:

table 2:

it should be noted that, in the embodiment of the present invention, a Sidelink Control Channel (SCCH) is a logical Channel corresponding to the SL-SCH, and the SIB carried by the SCCH may be understood as a MAC PDU carried by the SL-SCH and including system information.

In the table, when the LCID field is set to 61, the MAC PDU borne by the SL-SCH is indicated to include system information, and specifically, the MAC SDU borne by the SL-SCH may be indicated to carry the system information.

Another example is: when a new definition field or R field of the MAC subheader in the SL-SCH is used as the indication information, the meaning of the value corresponding to the R field may be as shown in table 3:

table 3:

value taking	Means of
		0	Non-system information
1	System information

When the value of the R field is 1, the MAC PDU carried by the SL-SCH is indicated to contain system information, and specifically, the MAC SDU carried by the SL-SCH may be indicated to carry the system information.

Another example is: when the new MAC subheader is defined in the SL-SCH as the indication information, the meaning of the value corresponding to the SIB ID indication in the new defined MAC subheader may be as shown in table 4:

table 4:

value taking	Means of
		0000	Non-system information
0001	System information
		0010-1111	Reservation

When the SIB ID indication value is 0001, the MAC PDU carried by the SL-SCH is indicated to include system information, and specifically, the MAC SDU carried by the SL-SCH may be indicated to carry the system information.

Another example is: when the SCI includes the indication information, the first SCI (1) may be added with an SIB information indication field as the indication information ^st -stage SCI) and second SCI (2) ^nd An SIB information indication field is added in the stage SCI) to indicate that the MAC PDU carried by the corresponding SL-SCH includes system information, and specifically, may indicate that the system information is transmitted by a corresponding physical sidelink shared channel (psch). The value corresponding to the SIB information indication field may be as shown in table 5:

table 5:

value taking	Means of
		0	Non-system information
1	System information

When the value of the SIB information indication field is 1, the MAC PDU carried by the SL-SCH is indicated to include system information, and specifically, the MAC SDU carried by the SL-SCH may be indicated to carry the system information.

Another example is: specifically, the target ID may be set to a specific value (for example, all 0 s or all 1 s) to indicate that the MAC SDU of the SL-SCH carries system information, and may also indicate that the corresponding logical channel is the SCCH carrying the system information through the LCID. In addition, in some embodiments, the lower 16 bits of the target ID are carried in the second SCI of the physical layer and the upper 8 bits are carried in the SL-SCH MAC subheader). In this case, the values of LCID may be as shown in table 6:

table 6:

and when the LCID value is 61, indicating that the MAC SDU of the SL-SCH carries the control plane radio bearer corresponding to the direct communication system information.

As an optional implementation manner, the indication information corresponds to a plurality of indication states, and the plurality of indication states respectively correspond to a plurality of system information types;

The plurality of indication states may be a plurality of values of the indication information, and different values may indicate different system information.

In this embodiment, the specific system information of the SL-SCH can be accurately indicated by the plurality of indication states, so that the remote terminal can acquire the specific system information according to actual requirements. For example: the remote terminal receives the data sent by the relay terminal through the direct communication interface, determines whether the MAC PDU carried by the remote terminal contains the system information or not through the indication information, decodes the data packet indicating that the carried MAC PDU contains the system information if the remote terminal needs to receive the system information, and only decodes the data packet indicating that the SIB is needed by the remote terminal if the indication information uses different values for different SIBs.

For example: when the V field in the SL-SCH is used as the indication information, the meaning of the corresponding value of the V field may be as shown in table 7:

table 7:

and when the value of the V domain is 0001, indicating the SL-SCH to carry the MIB, when the value of the V domain is 0010, indicating the SL-SCH to carry the SIB1, and when the value of the V domain is 0011, indicating the SL-SCH to carry the SIB2 and the like. It should be noted that the foregoing value is merely an example, and the embodiment of the present invention does not limit a specific relationship between the value of the indication information and the indication content thereof.

Another example is: when the LCID field of the MAC subheader in the SL-SCH is used as the indication information, the values corresponding to the LCID field may be as shown in table 8:

table 8:

when the LCID field takes a value of 52 to 61, specific system information carried by the SL-SCH may be indicated.

Another example is: when a new definition field or R field of the MAC subheader in the SL-SCH is used as the indication information, the meaning of the value corresponding to the R field may be as shown in table 9:

table 9:

wherein, different values of the R domain can indicate different system information carried by the SL-SCH.

Another example is: when the new MAC subheader is defined in the SL-SCH as the indication information, the meaning of the value corresponding to the SIB ID indication in the new defined MAC subheader may be as shown in table 10:

table 10:

value taking	Means of
		0000	MIB
0001	SIB1
		0010	SIB2
0011	SIB3
		0100	SIB4
0101	SIB5
		0111	SIB6
1000	SIB7
		1001	SIB8
1010	SIB12
		1011	Reservation
1100	Reservation
		1101	Reservation
1111	Reservation

Wherein, different values are indicated by SIB ID, and different system information carried by SL-SCH can be indicated.

Another example is: when the SCI includes the indication information, an SIB information indication field may be added to the SCI as the indication information, specifically, the SIB information indication field may be added to the first SCI (1) ^st -stage SCI) and second SCI (2) ^nd An SIB information indication field is added in the stage SCI) to indicate that the MAC PDU carried by the corresponding SL-SCH includes system information, and specifically, may indicate that the system information is transmitted by a corresponding physical sidelink shared channel (psch). The value corresponding to the SIB information indication field may be as shown in table 11:

table 11:

When the value of the SIB information indication field is different, the SL-SCH can be indicated to carry different system information.

In the embodiment of the invention, a relay terminal sends system information of a direct communication link on an SL-SCH, wherein an MAC (media access control) header or SCI (security context indicator) corresponding to the SL-SCH comprises indication information, and the indication information is used for indicating that an MAC PDU (protocol data unit) carried by the SL-SCH contains the system information. Therefore, the relay terminal can be supported to send the system information of the direct communication link on the SL-SCH, and the transmission performance of the system information is improved.

Referring to fig. 3, fig. 3 is a flowchart of a method for receiving system information according to an embodiment of the present invention, and as shown in fig. 3, the method includes the following steps:

step 301, a remote terminal receives a direct communication link shared channel SL-SCH, wherein a MAC PDU carried by the SL-SCH includes system information of a direct communication link, and at least one of a MAC header of media access control and physical layer direct communication link control information SCI corresponding to the SL-SCH includes indication information, and the indication information is used to indicate that the MAC PDU carried by the SL-SCH includes the system information;

step 302, the remote terminal obtains the direct communication link system information according to the indication information.

Optionally, the indication information includes at least one of the following:

a first indication of a Media Access Control (MAC) subheader, a Logical Channel Identity (LCID) and a target ID.

Optionally, the first indication of the MAC subheader includes at least one of:

It should be noted that, this embodiment is used as an implementation of the remote terminal corresponding to the embodiment shown in fig. 2, and specific implementation thereof may refer to the relevant description of the embodiment shown in fig. 2, so that, in order to avoid repeated description, the present embodiment is not described again, and the same beneficial effects may also be achieved.

Referring to fig. 4, fig. 4 is a structural diagram of a relay terminal according to an embodiment of the present invention, where the relay terminal is a first relay terminal, and as shown in fig. 4, the relay terminal includes a memory 420, a transceiver 400, and a processor 410:

a memory 420 for storing a computer program; a transceiver 400 for transceiving data under the control of the processor 410; a processor 410 for reading the computer program in the memory 420 and performing the following operations:

and sending direct communication link system information on a direct communication link shared channel (SL-SCH), wherein at least one of a Media Access Control (MAC) header and physical layer direct communication link control information (SCI) corresponding to the SL-SCH comprises indication information, and the indication information is used for indicating that a MAC PDU carried by the SL-SCH contains the system information.

Where in fig. 4, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 410 and various circuits of memory represented by memory 420 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 400 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over transmission media including wireless channels, wired channels, fiber optic cables, and the like. For different user devices, the user interface 430 may also be an interface capable of interfacing externally to a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 400 in performing operations.

Alternatively, the processor 410 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor may also have a multi-core architecture.

The processor is used for executing any method provided by the embodiment of the invention according to the obtained executable instructions by calling the computer program stored in the memory. The processor and memory may also be physically separated.

Optionally, the indication information includes at least one of the following:

a first indication of a MAC subheader, a logical channel identification LCID, a target ID.

Optionally, the first indication of the MAC subheader includes at least one of:

It should be noted that, the relay terminal provided in the embodiment of the present invention can implement all the method steps implemented by the foregoing method embodiment, and can achieve the same technical effect, and details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not described herein again.

Referring to fig. 5, fig. 5 is a block diagram of a remote terminal according to an embodiment of the present invention, where the remote terminal is a second remote terminal, and as shown in fig. 5, the remote terminal includes a memory 520, a transceiver 500, and a processor 510:

a memory 520 for storing a computer program; a transceiver 500 for transceiving data under the control of the processor 510; a processor 510 for reading the computer program in the memory 520 and performing the following operations:

Wherein in fig. 5, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 510, and various circuits, represented by memory 520, 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 500 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over transmission media including wireless channels, wired channels, fiber optic cables, and the like. For different user devices, the user interface 530 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 510 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.

Alternatively, the processor 510 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

Optionally, the indication information includes at least one of:

Optionally, the first indication of the MAC subheader includes at least one of:

Optionally, the indication information indicates that the MAC PDU carried on the SL-SCH includes system information under the condition of a first indication state, and indicates that the MAC PDU carried on the SL-SCH does not include system information under the condition of a second indication state.

the obtaining the system information according to the indication information includes:

and acquiring the target system information under the condition that the target system information is determined to be the system information required by the remote terminal according to the indication information.

It should be noted that, the remote terminal provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

Referring to fig. 6, fig. 6 is a structural diagram of another relay terminal according to an embodiment of the present invention, and as shown in fig. 6, a relay terminal 600 includes:

a sending unit 601, configured to send direct communication link system information on a direct communication link shared channel SL-SCH, where at least one of a medium access control MAC header and physical layer direct communication link control information SCI corresponding to the SL-SCH includes indication information, and the indication information is used to indicate that a MAC PDU carried by the SL-SCH includes system information.

Optionally, the indication information includes at least one of the following:

Optionally, the LCID in the SL-SCH is a third preset value, where the third preset value is a predefined fixed value, and is used to indicate that a control plane radio bearer corresponding to the direct communication system information is carried by a media access control service data unit MAC SDU of the SL-SCH.

Optionally, the first indication of the MAC subheader includes at least one of:

Optionally, the indication information corresponds to multiple indication states, and the multiple indication states respectively correspond to multiple system information types;

Referring to fig. 7, fig. 7 is a block diagram of another remote terminal according to an embodiment of the present invention, and as shown in fig. 6, a remote terminal 700 includes:

a receiving unit 701, configured to receive a direct communication link shared channel SL-SCH, where a MAC PDU carried by the SL-SCH includes direct communication link system information, and at least one of a media access control MAC header and physical layer direct communication link control information SCI corresponding to the SL-SCH includes indication information, where the indication information is used to indicate that the MAC PDU carried by the SL-SCH includes system information;

an obtaining unit 702, configured to obtain the direct communication link system information according to the indication information.

Optionally, the indication information includes at least one of:

Optionally, a first part of bits of the target ID is carried in the SCI, and a second part of bits of the target ID is carried in the MAC header.

Optionally, the first indication of the MAC subheader includes at least one of:

the obtaining unit 702 is configured to obtain the target system information when it is determined that the target system information is the system information required by the remote terminal according to the indication information.

It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solutions of the present application, which are essential or contributing to the prior art, or all or part of the technical solutions may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid State Disks (SSDs)), etc.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for transmitting system information, comprising:

the method comprises the steps that a relay terminal sends direct communication link system information on a direct communication link shared channel SL-SCH, wherein at least one item of a media access control MAC header and physical layer direct communication link control information SCI corresponding to the SL-SCH comprises indication information, and the indication information is used for indicating that a media access control protocol data unit (MAC PDU) carried by the SL-SCH contains the system information.

2. The method of claim 1, wherein the indication information comprises at least one of:

3. The method of claim 2, wherein the LCID is a first predetermined value, the first predetermined value being predefined and indicating that a MAC PDU carried by the SL-SCH contains system information.

4. The method of claim 2, wherein the target ID is a second predetermined value, the second predetermined value being predefined and indicating that MAC PDUs carried by the SL-SCH contain system information.

5. The method of claim 2, wherein a first portion of bits of the target ID is carried in the SCI and a second portion of bits of the target ID is carried in the MAC header.

6. The method of claim 1, wherein the SCI comprises a first SCI of a physical layer or a second SCI of the physical layer.

7. The method of any one of claims 4 to 6, wherein the LCID in the SL-SCH is a third preset value, and the third preset value is a predefined fixed value, which is used to indicate that a medium access control service data unit, MAC SDU, of the SL-SCH carries a control plane radio bearer corresponding to the direct communication system information.

8. The method of claim 2, wherein the first indication of the MAC subheader comprises at least one of:

9. The method of claim 8, wherein the first domain indication is a V domain pre-specified at the first MAC subheader.

10. The method of claim 1, wherein the indication information indicates that the MAC PDU carried by the SL-SCH contains system information in case of a first indication state, and wherein the indication information indicates that the MAC PDU carried by the SL-SCH does not contain system information in case of a second indication state.

11. The method of claim 1, wherein the indication information corresponds to a plurality of indication states, the plurality of indication states corresponding to a plurality of system information types, respectively;

and under the condition that the indication information is in a target indication state, the indication information is used for indicating that the MAC PDU carried by the SL-SCH contains target system information, and the target system information is a system information type corresponding to the target indication state.

12. A method for receiving system information, comprising:

a remote terminal receives a direct communication link shared channel (SL-SCH), wherein a Media Access Control (MAC) PDU carried by the SL-SCH contains system information of the direct communication link, at least one of a Media Access Control (MAC) header and physical layer direct communication link control information (SCI) corresponding to the SL-SCH comprises indication information, and the indication information is used for indicating that a media access control protocol data unit (MAC PDU) carried by the SL-SCH contains the system information;

13. The method of claim 12, wherein the indication information comprises at least one of:

14. The method of claim 13, wherein the LCID is a first preset value, wherein the first preset value is predefined and indicates that a MAC PDU carried by the SL-SCH contains system information.

15. The method of claim 13, wherein the target ID is a second predetermined value, the second predetermined value being predefined and indicating that MAC PDUs carried by the SL-SCH contain system information.

16. The method of claim 13, wherein a first portion of bits of the target ID is carried in the SCI and a second portion of bits of the target ID is carried in the MAC header.

17. The method of claim 12, wherein the SCI comprises a first SCI of a physical layer or a second SCI of the physical layer.

18. The method of any one of claims 16 to 17, wherein the LCID in the SL-SCH is a third preset value, and the third preset value is a predefined fixed value, which is used to indicate that a MAC SDU of the SL-SCH carries a control plane radio bearer corresponding to the direct communication system information.

19. The method of claim 13, wherein the first indication of the MAC subheader comprises at least one of:

20. The method of claim 19, wherein the first domain indication is a V domain pre-specified at the first MAC subheader.

21. The method of claim 12, wherein the indication information indicates that the MAC PDU carried by the SL-SCH contains system information in case of a first indication state, and wherein the indication information indicates that the MAC PDU carried by the SL-SCH does not contain system information in case of a second indication state.

22. The method of claim 12, wherein the indication information corresponds to a plurality of indication states, the plurality of indication states respectively corresponding to a plurality of system information types;

under the condition that the indication information is in a target indication state, the indication information is used for indicating that the MAC PDU carried by the SL-SCH contains target system information, and the target system information is a system information type corresponding to the target indication state;

23. A relay terminal, comprising: a memory, a transceiver, and a processor, wherein:

and sending direct communication link system information on a direct communication link shared channel (SL-SCH), wherein at least one of a Media Access Control (MAC) header and physical layer direct communication link control information (SCI) corresponding to the SL-SCH comprises indication information, and the indication information is used for indicating that a media access control protocol data unit (MAC PDU) carried by the SL-SCH contains the system information.

24. The relay terminal of claim 23, wherein the indication information comprises at least one of:

25. The relay terminal of claim 24, wherein the LCID is a first predetermined value, the first predetermined value being predefined and indicating that a MAC PDU carried by the SL-SCH contains system information.

26. The relay terminal of claim 24, wherein the target ID is a second predetermined value, the second predetermined value being predefined and indicating that the MAC PDU carried by the SL-SCH contains system information.

27. The method of claim 24, wherein the first indication of the MAC subheader comprises at least one of:

28. A remote terminal, comprising: a memory, a transceiver, and a processor, wherein:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following:

receiving a direct communication link shared channel (SL-SCH), wherein a Media Access Control (MAC) protocol data unit (MAC PDU) carried by the SL-SCH contains system information of the direct communication link, and at least one of a Media Access Control (MAC) header and physical layer direct communication link control information (SCI) corresponding to the SL-SCH includes indication information, wherein the indication information is used for indicating that the MAC PDU carried by the SL-SCH contains the system information;

29. The remote terminal of claim 28, wherein the indication information includes at least one of:

30. The remote terminal of claim 29, wherein the LCID is a first predetermined value, the first predetermined value being predefined and indicating that a MAC PDU carried by the SL-SCH contains system information.

31. The remote terminal of claim 29, wherein the target ID is a second predetermined value, the second predetermined value being predefined and used to indicate that MAC PDUs carried by the SL-SCH contain system information.

32. The method of claim 29, wherein the first indication of the MAC subheader comprises at least one of:

a first domain indication of a first MAC subheader, a second domain indication of the first MAC subheader, a third domain indication in a second MAC subheader;

33. A relay terminal, comprising:

34. The relay terminal of claim 33, wherein the indication information comprises at least one of:

35. The relay terminal of claim 34, wherein the LCID is a first predetermined value, the first predetermined value being predefined and used to indicate that a MAC PDU carried by the SL-SCH contains system information.

36. The relay terminal of claim 34, wherein the target ID is a second predetermined value, the second predetermined value being predefined and indicating that MAC PDUs carried by the SL-SCH contain system information.

37. A remote terminal, comprising:

a receiving unit, configured to receive a direct communication link shared channel SL-SCH, where a MAC PDU carried by the SL-SCH includes system information of a direct communication link, and at least one of a medium access control MAC header and physical layer direct communication link control information SCI corresponding to the SL-SCH includes indication information, where the indication information is used to indicate that the MAC PDU carried by the SL-SCH includes the system information;

38. The remote terminal of claim 37, wherein the indication information includes at least one of:

39. The remote terminal of claim 38, wherein the LCID is a first predetermined value, the first predetermined value being predefined and indicating that MAC PDUs carried by the SL-SCH contain system information.

40. The remote terminal of claim 38, wherein the target ID is a second predetermined value, the second predetermined value being predefined and indicating that MAC PDUs carried by the SL-SCH contain system information.

41. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to execute the system information transmission method according to any one of claims 1 to 11 or the system information reception method according to any one of claims 12 to 22.