WO2021043276A1 - 消息传输方法和终端 - Google Patents

消息传输方法和终端 Download PDF

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Publication number
WO2021043276A1
WO2021043276A1 PCT/CN2020/113551 CN2020113551W WO2021043276A1 WO 2021043276 A1 WO2021043276 A1 WO 2021043276A1 CN 2020113551 W CN2020113551 W CN 2020113551W WO 2021043276 A1 WO2021043276 A1 WO 2021043276A1
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WIPO (PCT)
Prior art keywords
message
priority
discovery
threshold
signaling
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PCT/CN2020/113551
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English (en)
French (fr)
Inventor
梁敬
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维沃移动通信有限公司
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Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Priority to CA3153084A priority Critical patent/CA3153084A1/en
Priority to JP2022514692A priority patent/JP7290801B2/ja
Priority to AU2020342206A priority patent/AU2020342206B2/en
Priority to BR112022003960A priority patent/BR112022003960A2/pt
Priority to EP20860399.3A priority patent/EP4027671A4/en
Priority to KR1020227008983A priority patent/KR20220050929A/ko
Priority to MX2022002762A priority patent/MX2022002762A/es
Publication of WO2021043276A1 publication Critical patent/WO2021043276A1/zh
Priority to US17/686,567 priority patent/US20220191676A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0215—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/246—Connectivity information discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a message transmission method and terminal.
  • the current communication system supports secondary link (sidelink, SL, or translated as side link or direct link) communication.
  • sidelink communication data can be directly transmitted between terminals.
  • some communication systems plan to introduce discovery (discovery) messages, which can be used to discover devices. For example, the discovery terminal finds that there are directly connected terminals nearby.
  • discovery messages can be used to discover devices. For example, the discovery terminal finds that there are directly connected terminals nearby.
  • discovery messages only the introduction of discovery messages is planned, but the transmission of discovery messages has not yet been realized, which makes the discovery effect of the terminal relatively poor.
  • the embodiments of the present disclosure provide a message transmission method and a terminal to solve the problem that the discovery effect of the terminal is relatively poor.
  • embodiments of the present disclosure provide a message transmission method applied to a terminal, including:
  • the first discovery message is transparently transmitted between the upper layer and the media access control (Media Access Control, MAC) layer, and the priority of the first discovery message is determined according to whether the first discovery message is used for public safety ;or
  • the first discovery message is transmitted between the upper layer and the MAC layer through a logical channel, and the priority of the first discovery message is determined according to the logical channel and/or the corresponding bearer.
  • the embodiments of the present disclosure provide a message transmission method, which is applied to a terminal, and includes:
  • the UL message and the SL message are transmitted.
  • a terminal including:
  • the transmission module is used to transmit the first discovery message of SL;
  • the first discovery message is transparently transmitted between the upper layer and the MAC layer, and the priority of the first discovery message is determined according to whether the first discovery message is used for public safety;
  • the first discovery message is transmitted between the upper layer and the MAC layer through a logical channel, and the priority of the first discovery message is determined according to the logical channel and/or the corresponding bearer.
  • a terminal including:
  • the determining module is used to determine the priority of the UL message and the SL message according to the first threshold value and the second threshold value;
  • the processing module is configured to perform transmission processing on the UL message and the SL message according to the priority of the UL message and the SL message.
  • an embodiment of the present disclosure provides a terminal, including: a memory, a processor, and a program stored on the memory and capable of running on the processor, and when the program is executed by the processor, the foregoing
  • the steps in the message transmission method provided by the first aspect, or the steps in the message transmission method provided by the second aspect are implemented when the program is executed by the processor.
  • embodiments of the present disclosure provide a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, the message transmission method provided in the first aspect is implemented When the computer program is executed by a processor, the steps in the message transmission method provided in the second aspect are implemented.
  • the first discovery message of SL is transmitted; wherein, the first discovery message is transparently transmitted between the upper layer and the MAC layer, and the priority of the first discovery message depends on whether the first discovery message is used or not. Determined for public safety; or the first discovery message is transmitted between the upper layer and the MAC layer through a logical channel, and the priority of the first discovery message is determined according to the logical channel and/or the corresponding bearer. Since it supports discovery messages, the discovery effect of the terminal is improved.
  • FIG. 1 is a structural diagram of a network system applicable to an embodiment of the present disclosure
  • Figure 2 is a flowchart of a message transmission method provided by an embodiment of the present disclosure
  • FIG. 3 is a flowchart of another message transmission method provided by an embodiment of the present disclosure.
  • FIG. 4 is a structural diagram of a terminal provided by an embodiment of the present disclosure.
  • Figure 5 is a structural diagram of another terminal provided by an embodiment of the present disclosure.
  • Fig. 6 is a structural diagram of another terminal provided by an embodiment of the present disclosure.
  • words such as “exemplary” or “for example” are used as examples, illustrations, or illustrations. Any embodiment or design solution described as “exemplary” or “for example” in the embodiments of the present disclosure should not be construed as being more optional or more advantageous than other embodiments or design solutions. To be precise, words such as “exemplary” or “for example” are used to present related concepts in a specific manner.
  • the message transmission method and terminal provided by the embodiments of the present disclosure can be applied to a wireless communication system.
  • the wireless communication system may be a 5G system, or an evolved Long Term Evolution (eLTE) system or a Long Term Evolution (LTE) system, or a subsequent evolved communication system, etc.
  • eLTE evolved Long Term Evolution
  • LTE Long Term Evolution
  • FIG. 1 is a structural diagram of a network system applicable to an embodiment of the present disclosure. As shown in FIG. 1, it includes a terminal 11, a terminal 12, and a control node 13. Through the PC5 interface and using sidelin (SL) communication, the control node 13 and the terminal (including the terminal 11 and the terminal 12) can communicate through the air interface (Uu) interface and using the uplink and downlink (uplink and downlink).
  • SL sidelin
  • the terminal 11 and the terminal 12 may be User Equipment (UE) or other terminal-side devices, such as mobile phones, tablet computers (Tablet Personal Computer), laptop computers (Laptop Computer), personal digital assistants (personal digital assistants, PDA), Mobile Internet Device (MID), Wearable Device (Wearable Device), smart car, in-vehicle equipment, or robot, and other terminal-side devices.
  • UE User Equipment
  • PDA personal digital assistants
  • MID Mobile Internet Device
  • MID Wearable Device
  • smart car in-vehicle equipment, or robot
  • the terminal-side devices is not limited in the embodiments of the present disclosure.
  • the above-mentioned control node 13 may be a network device, such as a 4G base station, or a 5G base station, or a later version base station, or a base station in other communication systems, or it is called Node B, Evolved Node B, or Transmission Reception Point.
  • control node 13 may be some Integrated Access Backhaul (IAB), or some sidelink terminal, relay (relay), road side unit (Road Side Unit, RSU), of course, it can also be It is some other network facilities similar to RSU or IAB.
  • IAB Integrated Access Backhaul
  • RSU road side unit
  • FIG. 2 is a flowchart of a message transmission method provided by an embodiment of the present disclosure. The method is applied to a terminal. As shown in FIG. 2, it includes the following steps:
  • Step 201 Transmit the first discovery message of SL;
  • the first discovery message is transparently transmitted between the upper layer and the MAC layer, and the priority of the first discovery message is determined according to whether the first discovery message is used for public safety;
  • the first discovery message is transmitted between the upper layer and the MAC layer through a logical channel, and the priority of the first discovery message is determined according to the logical channel and/or the corresponding bearer.
  • the foregoing first discovery message for transmitting the SL may be sending the first discovery message on the SL, or may be receiving the first discovery message on the SL.
  • the above-mentioned first discovery message may be a discovery message sent by a terminal performing discovery, or a discovery message sent by a discovered terminal; if a discovery is requested, the terminal that sends the message may request discovery of other devices through the message, or take the initiative (e.g. Broadcast) discovery, that is, the terminal sending the message actively tells other devices.
  • the initiative e.g. Broadcast
  • the above-mentioned first discovery message may be a discovery-related message, which may be used for various types of discovery-related messages for multiple purposes. For example: used for group discovery in Network Controlled Interactive Services (NCIS) related services, used for group discovery in other services, used for relay discovery (including terminal-to-network relay, and terminal-to-terminal Following) or for related messages such as terminal discovery.
  • NCIS Network Controlled Interactive Services
  • the above-mentioned first discovery message may be a discovery-related message defined in a communication protocol, or a discovery-related message newly defined in a subsequent protocol version.
  • the foregoing transparent transmission of the first discovery message between the upper layer and the MAC layer may be that the first discovery message is transparently transmitted from the upper layer to the MAC layer, or the first discovery message is transparently transmitted from the MAC layer to the upper layer.
  • the access stratum (AS) layer protocol stack only includes the MAC layer and the physical layer, and the first discovery message does not have a corresponding logical channel.
  • the priority of the first discovery message is determined according to whether the first discovery message is used for public safety (public safety), for example, the priority of the discovery message for public safety is higher than that for non-public safety. The priority of the message.
  • the foregoing transmission of the first discovery message through a logical channel between the upper layer and the MAC layer may be that the first discovery message is transmitted from the upper layer to the MAC layer through the logical channel, or the first discovery message is transmitted from the MAC layer to the upper layer through the logical channel.
  • the AS layer protocol stack may also include a Packet Data Convergence Protocol (PDCP) layer and a Radio Link Control (RLC) layer.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • the logical channel may be a data logical channel, and the data logical channel may include a sidelink traffic channel (STCH); or the foregoing logical channel may be a signaling logical channel, and the signaling logical channel may include a secondary link.
  • STCH sidelink traffic channel
  • STCH sidelink traffic channel
  • the foregoing logical channel may be a signaling logical channel, and the signaling logical channel may include a secondary link.
  • the priority of the first discovery message is determined according to the logical channel and/or the corresponding bearer, for example: the priority of the first discovery message follows the logical channel or the corresponding bearer, or the priority of the first discovery message The level is determined by the logical channel and the corresponding bearer. If the priorities of the logical channel and the corresponding bearer are inconsistent, one of the priorities is selected as the priority of the first discovery message.
  • the aforementioned corresponding bearer may be a bearer that transmits the aforementioned discovery message.
  • the first discovery message may be transmitted through a physical channel, or the first discovery message may be received from the physical channel and then transmitted to the MAC layer.
  • the transmission of the discovery message can be realized through the above steps, so that the terminal can be discovered to improve the discovery effect of the terminal.
  • the foregoing transmission of the first discovery message of the SL may be transmitted according to the priority of the first discovery message.
  • the priority of the first discovery message is determined as follows:
  • the first message of the uplink (Uplink, UL) is the first priority
  • the first message of the SL is the second priority
  • the second message of UL and the second message of the SL are the third priority
  • the second priority is higher than the third priority
  • the priority of the discovery message used for public safety is higher than or equal to the second priority, or higher than the third priority, or lower than the third priority;
  • the priority of the discovery message used for non-public safety is higher than the third priority or lower than the third priority
  • the priority of the discovery message for public safety is higher than the priority of the discovery message for non-public safety.
  • the priority of the discovery message used for public safety is higher than the priority of the discovery message used for non-public safety may be that the priority of the discovery message used for public safety is always higher than the priority of the discovery message used for non-public safety.
  • Discovery news for public safety For example: in the case that the discovery message used for public safety is lower than the third priority, and the discovery message used for non-public safety is lower than the third priority, the discovery message used for non-public safety is better than the discovery message used for public safety.
  • the priority of the discovery message is lower.
  • the priority of the discovery message for non-public safety is the fifth priority
  • the priority of the discovery message for public safety is the fourth priority
  • the fourth priority is higher than the fifth priority. The priority is high.
  • the priority of the discovery message for public safety is higher than or equal to the second priority, which may be lower than or equal to the first priority but higher than or equal to the second priority.
  • the priority of the discovery message may be higher than the third priority, lower than or equal to the second priority but higher than the third priority.
  • the priority of the foregoing discovery message for non-public safety is higher than the third priority, which may be lower than or equal to the foregoing second priority, but higher than the third priority.
  • the terminal can give priority to sending or receiving important messages, so that the overall performance of the communication system is better.
  • the first discovery message is transparently transmitted to the MAC layer, resource scheduling is performed through the MAC layer, and then transmitted through the physical channel, and the physical sidelink discovery channel (PSDCH) is transmitted.
  • the priority order of the discovery message and other messages may be directly regulated by the network configuration or in the protocol.
  • SL discovery gap a possible sequence is as follows:
  • the third priority SL PC5 port discovery related message transmission.
  • the priority of the discovery message used for public safety and the discovery message used for non-public safety in the discovery gap is higher than that of the first Three priorities.
  • the aforementioned discovery gap may be an interval used for sending and receiving discovery messages.
  • the priority of the discovery message used for public safety and the discovery message used for non-public safety in the discovery gap is higher than the third priority may be that the discovery message used for public safety is higher than the third priority.
  • Priority but lower than the first priority or the second priority. Of course, it can also be the highest priority in the gap.
  • Discovery messages used for non-public safety are higher than the third priority, but lower than the first priority. Or second priority.
  • the discovery message can be transmitted preferentially in the aforementioned discovery gap.
  • the first discovery message includes indication information, and the indication information is used to indicate that the first discovery message is a discovery message for public safety or a discovery message for non-public safety or commercial (commercial) news.
  • the above indication information can be understood as indicating the type of the first discovery message, for example: indicating that the first discovery message is used for public safety, or indicating that the first discovery message is used for non-public safety or business, where Commercial discovery messages can also belong to discovery messages used for non-public safety. That is to say, the aforementioned discovery message for non-public security may be the aforementioned indication information indicating that it is used for non-secure discovery or commercial (commercial).
  • the indication information may also be used to indicate the discovery content of the first discovery message.
  • the discovery content may refer to that the discovery message is used for group discovery in NCIS related services, used for group discovery in other services, and used for relay discovery (including terminal-to-network relay and terminal-to-terminal relay) Or for terminal discovery, etc.
  • the above-mentioned indication information can indicate the above-mentioned first discovery message type and discovery content, so that the terminal can accurately confirm its priority.
  • the first message of the UL includes: at least one of a random access message of the UL, an emergency communication message of the UL, and a first service message of the UL; the second message of the UL The message is: a message in the UL except the first message of the UL.
  • the foregoing random access message may be a random access message of a random access channel (Random Access Channel, RACH), for example, msg1 or msg3 (or msgA).
  • RACH Random Access Channel
  • the foregoing emergency communication message may be an emergency communication message defined in a protocol such as an emergency protocol data unit (Protocol Data Unit, PDU).
  • PDU Protocol Data Unit
  • the above-mentioned first service message may be a message of some special services, for example, a service message such as Ultra Reliable Low Latency Communications (URLLC), which may specifically be a predefined service.
  • a service message such as Ultra Reliable Low Latency Communications (URLLC), which may specifically be a predefined service.
  • URLLC Ultra Reliable Low Latency Communications
  • the second message of the UL may be other services besides the first service message, such as the second service message.
  • the second service message may be an enhanced mobile broadband (Enhance Mobile Broadband, eMBB) related message or a large number of machine types.
  • Communication Massive Machine Type Communication, mMTC related messages, etc.
  • the above-mentioned second UL message may be UL data.
  • the messages in the embodiments of the present disclosure may be data or signaling.
  • the priority of the message may be the priority of the message transmission.
  • the first message of the SL includes: Radio Resource Control (RRC) signaling of the SL
  • the second message of the SL includes: data of the SL and PC5 of the SL
  • the first message of the SL includes: at least one of the RRC signaling of the SL and the PC5 signaling message of the SL
  • the second message of the SL includes: the data of the SL.
  • RRC signaling may be RRC-related signaling.
  • UL messages or data may also be referred to as Uu port messages or data
  • SL messages or data may also be referred to as PC5 port messages or data.
  • the first message of the SL includes the RRC signaling of the SL and the PC5 signaling message of the SL:
  • the RRC signaling of the SL and the PC5 signaling message of the SL are transmitted through the same signaling radio bearers (SRB), and the RRC signaling of the SL and the PC5 signaling message of the SL have priority The same level; or
  • the RRC signaling of the SL and the PC5 signaling message of the SL are transmitted through different SRBs.
  • the SRB used for the PC5 signaling message of the SL is configured through the RRC signaling of the SL.
  • the PC5 signaling message of the SL is transmitted on the established SRB, and the priority of the RRC signaling of the SL is higher than that of the PC5 signaling message of the SL priority.
  • the RRC signaling of the SL and the PC5 signaling message of the SL have the same priority.
  • the terminal transmits the PC5 signaling message of the SL and the RRC signaling of the SL according to the corresponding priority.
  • the foregoing RRC signaling of the SL of the SRB configured for the PC5 signaling message of the SL is not limited to the RRC signaling included in the first message of the SL, that is, the first message of the SL may include The RRC signaling may not be.
  • the SRB that can be used to configure the PC5 signaling message is not necessarily configured by the RRC signaling included in the first message of the SL.
  • the multiple messages of the third priority are transmitted on a data radio bearer (DRB);
  • DRB data radio bearer
  • At least two of the multiple messages of the third priority have different priorities
  • the message with the higher priority is sent first or some of the multiple messages of the third priority are discarded first.
  • the above-mentioned multiple messages of the third priority may be the second message of SL and the second message of UL, for example: UL data, SL data, and SL PC5 signaling message, where UL data may be non-RACH
  • UL data may be non-RACH
  • QoS quality of service
  • LCID logical channel identifier
  • QoS related parameters It may include at least one of a quality of service flow ID (QoS Flow ID, QFI), a quality of service flow ID (PC5 QoS flow ID, PFI) for PC5, and a QoS identifier (PC5 QoS identifier, PQI) for PC5.
  • QoS Flow ID QoS Flow ID
  • PC5 QoS flow ID quality of service flow ID
  • PQI QoS identifier
  • PQI may also be called VQI (V2X QoS flow ID).
  • the terminal transmits the above-mentioned third priority message
  • the message with high priority is transmitted preferentially or some messages of the multiple messages of the third priority are discarded first, so as to improve the transmission performance of the terminal.
  • the second message of the UL and the second message of the SL have different priorities, where;
  • the second message of the UL has priority; if the priority of the second message of the UL is not higher than the first threshold , And the priority of the second message of the SL is higher than the second threshold, the second message of the SL has priority; if the priority of the second message of the UL is not higher than the first threshold Value, and the priority of the second message of the SL is not higher than the second threshold value, the second message of the UL has priority;
  • the second message of the SL has priority; if the priority of the second message of the SL is not higher than the first threshold , And the priority of the second message of the UL is higher than the second threshold, the second message of the UL has priority; if the priority of the second message of the SL is not higher than the first threshold, And the priority of the second message of the UL is not higher than the second threshold, the second message of the SL has priority;
  • the second message of the SL has priority, otherwise , the second message of the UL takes precedence
  • the second message of the UL takes precedence, otherwise , The second message of the SL takes precedence;
  • the second message of the SL takes precedence.
  • the second message of the UL takes precedence.
  • the SL The priority of the second message of the UL and the second message of the UL is determined by the terminal.
  • the priority of the second message of the SL is higher than the first threshold, and so The priority of the second message of the UL is not higher than the second threshold, and the second situation is: if the priority of the second message of the SL is not higher than the first threshold, and the The priority of the second message of the UL is higher than the second threshold.
  • the above is not higher or lower than or equal to.
  • the first threshold value and the second threshold value may be configured or pre-configured on the network side, and the first threshold value may be greater than the second threshold value, or the second threshold value may be greater than the first threshold value.
  • a threshold value in addition, in the above embodiment, the first threshold value may be judged first, and then the second threshold value may be judged. Of course, in some embodiments, these two threshold values may also be used at the same time. Judging, for example, if the priority of the second message of the SL is lower than the first threshold, and the priority of the second message of the UL is higher than the second threshold, then the second message of the UL In the preferred embodiment, two thresholds can be judged at the same time.
  • the second message of the SL has priority, otherwise
  • the priority of the second message of the UL may be that if the priority of the second message of the SL is large enough and the priority of the second message of the UL is small enough, then the SL transmission is prioritized; otherwise, the UL transmission is prioritized.
  • the priority of the second message of the SL may be: if the priority of the second message of the SL is small enough and the priority of the second message of the UL is large enough, then the UL transmission is prioritized; otherwise, the SL transmission is prioritized.
  • the priority of the second message of the SL and the second message of the UL may be determined by the terminal. If the priority is large enough and the priority of the second UL message is small enough, SL transmission is given priority. If the priority of the second message of SL is small enough and the priority of the second UL message is large enough, UL transmission is given priority, and The rest is left to the terminal to implement, that is, the terminal determines.
  • the priority of each message may be UL logical channel (Logical Channel, LCH) priority (priority), SL LCH priority (short distance communication data packet priority) configured or pre-configured on the network side.
  • Level ProSe Per-Packet Priority, PPPP
  • QoS identifier PC5 QoS identifier, PQI
  • 5G QoS identifier, 5QI for 5G Uu
  • priority field in PQI/5QI priority field in PQI/5QI.
  • the priority of the first discovery message is the SRB that transmits the first discovery message Or control the priority of the logical channel.
  • the above-mentioned SRB may be transmitted on a control logical channel, and the control logical channel may transmit one or more SRBs. Even if the control logical channel has only one SRB, the priority of the first discovery message may be determined by the priority of the SRB, but the priority of the SRB may be determined by the control logical channel.
  • the priority of the discovery message is the priority of the SRB or the control logical channel that transmits the first discovery message.
  • the first discovery message is transmitted through the SCCH.
  • the Discovery-related message is the same as the RRC signaling of the SL (or called the PC5-RRC message) and is transmitted on the SCCH.
  • the priority of the first discovery message follows the priority of the SCCH logical channel or the corresponding SRB. For example, because the SCCH is likely to be similar to the CCCH on the Uu port, it transmits signaling messages and has the highest priority (such as priority 1). Therefore, the first discovery message also has the highest priority.
  • One way may be: when the control logical channel includes SRBs with different priorities, the first discovery message and the SL message may be transmitted on the SRBs with different priorities of the control logical channel, and so
  • the priority of the first discovery message is the priority of the SRB that transmits the first discovery message
  • the message of the SL includes at least one of the RRC signaling of the SL and the PC5 signaling message of the SL.
  • the first discovery message is transmitted through a data logical channel between the upper layer and the MAC layer:
  • the first discovery message is assigned a QoS parameter, the first discovery message is mapped by the terminal to a corresponding data logical channel according to the QoS parameter, and the priority of the first discovery message is to transmit the first discovery The priority of the DRB or data logical channel of the message; or
  • the first discovery message is assigned an LCID, and the priority of the first discovery message is the priority of the logical channel corresponding to the LCID.
  • the aforementioned QoS parameter may be a parameter related to QoS, such as at least one of QFI, PFI, PQI, and VQI.
  • the foregoing QoS parameters may be configured by the terminal to the first discovery message, or network configuration or protocol agreement.
  • the first discovery message is assigned QoS related parameters (QFI/PFI, PQI/VQI), and the first discovery message is mapped to different logical channels through terminal-side QoS rules, and is compared with other data based on the priority of the logical channel.
  • QFI/PFI, PQI/VQI QoS related parameters
  • the parameters and mapping methods of this embodiment can be implemented based on a variety of methods such as pre-defined or network configuration.
  • the DRB may be transmitted on the logical data channel, and the logical data channel may transmit one or more DRBs. Even if the data logical channel has only one DRB, the priority of the first discovery message may be determined by the priority of the DRB, but the priority of the DRB may be determined by the control logical channel.
  • the priority of the logical channel corresponding to the aforementioned LCID can also be understood as the priority of the LCID.
  • this can correspond to a certain type of special priority, that is, an LCID is assigned to the first discovery message, and the LCID corresponds to a certain type of special priority.
  • the priority of the above-mentioned first discovery message may also refer to the priority of other messages described in the previous embodiment, which will not be repeated here.
  • the priority of the first discovery message is determined according to the following:
  • the first message of UL is the first priority
  • the first message of SL and the first discovery message are the second priority
  • the second message of UL and the second message of SL are the third priority
  • the second priority is higher than the third priority
  • the priority of the first discovery message is determined according to the following:
  • the first message of UL is the first priority
  • the first message of SL is the second priority
  • the second message of UL, the second message of SL, and the first discovery message are the third priority
  • the first priority is Higher than or equal to the second priority
  • the second priority is higher than the third priority.
  • the first message and the second message of the above UL can refer to the description of the above implementation manner, which will not be repeated here.
  • transmitting the first discovery message through a control logical channel between the upper layer and the MAC layer may refer to: transmitting the first discovery message between the upper layer and the MAC layer through the SRB;
  • the first message of the SL includes: RRC signaling of the SL and the PC5 signaling message of the SL, and the second message of the SL includes: data of the SL; or, the first message of the SL It includes: the RRC signaling of the SL, and the second message of the SL includes the data of the SL and the PC5 signaling message of the SL.
  • first message and the second message of the above SL can be referred to the description of the above embodiment, which is not repeated here.
  • the first discovery message and the first message of the SL may be transmitted through the same SRB, and the priority of the first discovery message and the first message of the SL are the same; or
  • the first discovery message and the first message of the SL may be transmitted on at least two SRBs, and the priority of the RRC signaling of the SL is higher than or equal to the priority of the first discovery message, The priority of the first discovery message is higher than or equal to the PC5 signaling message of the SL.
  • the first discovery message is transmitted on a first SRB
  • the RRC signaling of the SL is transmitted on the first SRB or the second SRB, and is used for the third part of the PC5 signaling message of the SL.
  • the SRB is configured through the RRC signaling of the SL, and if the establishment of the third SRB is completed, the PC5 signaling message of the SL is transmitted on the third SRB;
  • the first SRB and the second SRB have the highest priority in the control logical channel, and the priority of the third SRB is lower than the priority of the first SRB and the second SRB.
  • the RRC signaling of the SL of the third SRB is not limited to the RRC signaling included in the first message of the SL, that is, it may or may not be the RRC signaling included in the first message of the SL. That is, the third SRB that can be used to configure the third SRB is not necessarily configured by the RRC signaling included in the first message of the SL, there are many types of SL RRC, and the RRCs transmitted on the SRB are not necessarily all used to configure the SRB.
  • the first discovery-related message is transmitted using the default SRB with the highest priority
  • the RRC signaling is transmitted using the default SRB or dedicated SRB with the highest priority.
  • the SRB of the PC5 signaling message used for SL passes through the PC5. -RRC is configured. After the establishment of the SRB dedicated to the PC5 signaling message is completed, the PC5 signaling message of the SL is transmitted on the newly created SRB, which has a slightly lower priority.
  • transmitting the first discovery message through a data logical channel between the upper layer and the MAC layer may refer to: transmitting the first discovery message between the upper layer and the MAC layer through DRB;
  • the first message of the SL includes: RRC signaling of the SL and the PC5 signaling message of the SL, and the second message of the SL includes: data of the SL; or, the first message of the SL It includes: the RRC signaling of the SL, and the second message of the SL includes the data of the SL and the PC5 signaling message of the SL.
  • first message and the second message of the above SL can be referred to the description of the above embodiment, which is not repeated here.
  • the multiple messages of the third priority are transmitted on the DRB;
  • At least two of the multiple messages of the third priority have different priorities
  • the message with the higher priority is sent first or some of the multiple messages of the third priority are discarded first.
  • the above-mentioned multiple messages of the third priority may include: a second message of UL and a second message of SL, or may include: a second message of UL, a second message of SL, and the first discovery message.
  • the second message of the SL including the PC5 signaling message may be assigned a special LCID or QoS related parameters (for example: QFI/PFI, PQI/VQI).
  • the second message of the UL and the second message of the SL have different priorities, where;
  • the second message of the UL has priority; if the priority of the second message of the UL is not higher than the first threshold , And the priority of the second message of the SL is higher than the second threshold, the second message of the SL has priority; if the priority of the second message of the UL is not higher than the first threshold Value, and the priority of the second message of the SL is not higher than the second threshold value, the second message of the UL has priority;
  • the second message of the SL has priority; if the priority of the second message of the SL is not higher than the first threshold , And the priority of the second message of the UL is higher than the second threshold, the second message of the UL has priority; if the priority of the second message of the SL is not higher than the first threshold, And the priority of the second message of the UL is not higher than the second threshold, the second message of the SL has priority;
  • the second message of the SL has priority, otherwise , the second message of the UL takes precedence
  • the second message of the UL takes precedence, otherwise , The second message of the SL takes precedence;
  • the second message of the SL takes precedence.
  • the second message of the UL takes precedence.
  • the SL The priority of the second message of the UL and the second message of the UL is determined by the terminal.
  • the priority of the second message of the SL is higher than the first threshold, and so The priority of the second message of the UL is not higher than the second threshold, and the second situation is: if the priority of the second message of the SL is not higher than the first threshold, and the The priority of the second message of the UL is higher than the second threshold.
  • the priority of sending the first discovery message is higher than the priority of receiving the first discovery message
  • the priority of sending the second message of the UL is higher than the priority of receiving the second message of the UL;
  • the priority of sending the second message of the SL is higher than the priority of receiving the second message of the SL.
  • the priority of sending and receiving messages can be further distinguished, so that the sending and receiving of messages is more reasonable, so as to improve the overall performance of the communication system.
  • other messages may also be transmitted according to the above-defined priority, for example: the first message and the second message of SL, and the first message of UL And the second message.
  • the first discovery message of SL is transmitted; wherein, the first discovery message is transparently transmitted between the upper layer and the MAC layer, and the priority of the first discovery message depends on whether the first discovery message is used or not. Determined for public safety; or the first discovery message is transmitted between the upper layer and the MAC layer through a logical channel, and the priority of the first discovery message is determined according to the logical channel and/or the corresponding bearer. Since it supports discovery messages, the discovery effect of the terminal is improved.
  • the priority of various messages is defined, so that the terminal can send or receive important messages first, thereby improving the communication performance of the terminal.
  • the message transmission method provided by the embodiment shown in FIG. 2 is illustrated below with a number of embodiments. In the following embodiments, it can be used for the transmission and transmission of RACH random access msg1/3 (msgA) on the Uu port.
  • the transmission related to emergency communication (such as emergency PDU connection) represents the first message of the above SL
  • the PC5-RRC related signaling of the SL PC5 port represents the RRC signaling of the above SL
  • the data of the SL PC5 port represents the data of the above SL
  • Non-RACH random access msg1/3 (msgA) transmission and emergency communication (such as emergency PDU connection) related transmission data represents the second message of the above SL
  • the PC5-S signaling of the SL PC5 port represents the above PC5 signaling news.
  • the discovery message does not have a corresponding logical channel and is transmitted through a physical channel, and the PC5-S signaling is transmitted through DRB:
  • SL PC5 port data Uu port non-RACH random access msg1/3 (msgA) transmission and emergency communication (such as emergency PDU connection) related transmission data (depending on the QoS of the data), SL PC5 port PC5 -S signaling
  • the general principle is: 1>2>3>4, and public safety-related discovery information may be higher than PC5-RRC, and may be between PC5-RRC and PC5 data/Uu other data/PC5-S signaling. It may also be lower than PC5 data/Uu other data/PC5-S signaling, that is, the above 1.5, 2.5, and 3.5 can be any one of them.
  • the discovery messages of public safety and non-public safety are higher than PC5 data/Uu other data/PC5-S signaling.
  • the non-public safety discovery information may only indicate non-public safety or commercial. It can also be further specified what discovery is used for, such as for NCIS, or for group discovery, or for relay discovery, and so on.
  • the discovery message does not have a corresponding logical channel and is transmitted through a physical channel, and the PC5-S signaling is transmitted through SRB:
  • the PC5-RRC related signaling of the SL PC5 port and the PC5-S signaling of the SL PC5 port have the same priority. If there is more than one SRB, you can consider placing the PC5-RRC-related signaling of the SL PC5 port and the PC5-S signaling of the SL PC5 port on different SRBs, and the priority is PC5-RRC-related signaling>SL PC5-port PC5- S signaling.
  • the SRB used for the PC5-S signaling of the SL PC5 port is configured through the PC5-RRC.
  • the SRB dedicated to the PC5-S signaling is established, the PC5-S signaling of the SL PC5 port is in the newly created SRB. Transfer on.
  • the data priority of the Uu port is higher than the threshold 1, the data of the Uu port will be prioritized, otherwise (if the data priority of the Uu port is not higher than the threshold 1) the data of the PC5 port will be prioritized, or it can be if the data priority of the Uu port is not Above threshold 1, and the priority of PC5 port data is higher than threshold 2, then PC5 port data will be given priority;
  • the data priority of the PC5 port is higher than the threshold 1, the data of the PC5 port will be prioritized, otherwise the data of the Uu port will be prioritized, or it can be, if the data priority of the PC5 port is not higher than the threshold 1, and the data priority of the Uu port Above the threshold 2, the Uu port data will be prioritized.
  • the SL port data priority of the SL port is higher than the threshold 1, then the SL port data is prioritized, 1 otherwise (if the SL port data priority is not higher than the threshold 1) the Uu port data is prioritized, or it can be if the SL port data priority Not higher than threshold 1, and Uu port data priority is higher than threshold 2, then Uu port data priority:
  • the data priority of the Uu port is higher than the threshold 1, the data of the Uu port will be prioritized, otherwise the data of the PC5 port will be prioritized, or it can be if the data priority of the Uu port is not higher than the threshold 1, and the data of the PC5 port has a higher priority At threshold 2, the data of PC5 port will be given priority.
  • the above-mentioned priority may be the UL/SL LCH priority configured or pre-configured on the network side, or PPPP, or PQI/5QI, or the priority field in the PQI/5QI.
  • the discovery message is transmitted on the SRB
  • the PC5-S signaling is transmitted on the SRB:
  • a possible situation is that Discovery-related messages are transmitted using the default SRB with the highest priority, and PC5-RRC-related signaling is transmitted using the default SRB or dedicated SRB with the highest priority, which is used for the SL PC5 port.
  • the SRB of PC5-S signaling is configured through PC5-RRC.
  • the discovery message is transmitted on the SRB, and the PC5-S signaling is transmitted on the DRB:
  • priority 2 it can be the same as the implementation of priority 2 in the third embodiment, except that the three are replaced by two.
  • the discovery message is transmitted on the DRB, and the PC5-S signaling is transmitted on the SRB:
  • this embodiment can refer to the implementation manner of Embodiment 4, and only the PC5-S signaling of the SL PC5 port and Discovery related messages are transposed.
  • the discovery message is transmitted on the DRB
  • the PC5-S signaling is transmitted on the DRB:
  • priority 3 can refer to Embodiment 1 and Embodiment 2.
  • special LCID or QoS can be assigned to the PC5-S signaling and/or discvoery-related messages of the SL PC5 port.
  • Related parameters QFI/PFI, PQI/VQI.
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • the priority of receiving and sending different signaling is further distinguished:
  • Uu port data including priority 1 always priority and priority 3 Uu data that needs to be compared with SL port
  • send and receive SL port data send and receive discovery information
  • One or more of these three categories are further differentiated and given different priorities.
  • One case is to define priorities for corresponding messages separately, such as defining different LCIDs (LCIDs correspond to different priorities) or QoS related parameters (QFI/PFI, PQI/VQI) for different messages, and finally by comparing the priority of the message association Level (such as logical channel priority) to achieve.
  • LCIDs correspond to different priorities
  • QoS related parameters QFI/PFI, PQI/VQI
  • the priority of the message association Level such as logical channel priority
  • Another situation is: it is not necessary to define the priority of the corresponding message separately, and since the message is transmitted on different bearers/logical channels, the priority of the message is the priority of the follow bearer/logical channel. (For example, the discovery message is mapped to the default SRB and then transmitted on the SCCH, and the priority of the SCCH is 1, then the priority corresponding to the discovery message is 1).
  • the terminal can send or receive important messages first, so that the overall performance of the communication system is better.
  • FIG. 3 is a flowchart of a message transmission method provided by an embodiment of the present disclosure. The method is applied to a terminal. As shown in FIG. 3, it includes the following steps:
  • Step 301 Determine the priority of the UL message and the SL message according to the first threshold value and the second threshold value.
  • the foregoing first threshold value and second threshold value may be configured by the network or agreed upon by an agreement.
  • the foregoing first threshold value and second threshold value may be referred to in the embodiment shown in FIG. 2 Note, I won’t repeat it here.
  • Step 302 Perform transmission processing on the UL message and the SL message according to the priority of the UL message and the SL message.
  • the above-mentioned transmission processing of the UL message and the SL message may be to transmit a message with a higher priority first and then transmit a message with a lower priority in the order of priority, or it may be a message with a higher transmission priority, and Discard low-priority messages.
  • the terminal can transmit multiple messages at the same time, it can transmit the above UL message and the SL message at the same time.
  • the transmission here can be sending or receiving.
  • the foregoing UL message and the SL message may be the second message of UL and the second message of SL in the embodiment shown in FIG. 2, of course, this is not limited.
  • the UL message and the SL message may be a message on the UL and a message on the SL that are transmitted on the same logical channel.
  • the UL message and the SL message have different priorities, where;
  • the UL message takes precedence;
  • the SL message has priority; if the priority of the SL message is not higher than the first threshold, and the UL message is If the priority is higher than the second threshold, the UL message has priority; if the priority of the SL message is not higher than the first threshold, and the priority of the UL message is not higher than the second threshold , The SL message has priority;
  • the SL message has priority; otherwise, the UL message priority;
  • the UL message has priority; otherwise, the SL message priority;
  • the SL message takes precedence
  • the UL message takes precedence, except for the first case and the second case, the SL message and the UL message
  • the priority of is determined by the terminal, where in the first case: the priority of the SL message is higher than the first threshold, and the priority of the UL message is not higher than the second threshold Value, the second situation is: if the priority of the SL message is lower than the first threshold value, and the priority of the UL message is higher than the second threshold value.
  • the SL message includes: at least one of data of the SL, a PC5 signaling message of the SL, and a discovery message;
  • the UL message is a message other than a random access message, an emergency communication message, and a first service message in the UL.
  • the priority of the above UL message and the SL message can refer to the implementation manner of the first threshold value and the second threshold value provided in the embodiment shown in FIG. 2, which will not be repeated here, and can achieve the same Beneficial effect.
  • FIG. 4 is a structural diagram of a terminal provided by an embodiment of the present disclosure.
  • a terminal 400 includes:
  • the transmission module 401 is used to transmit the first discovery message of SL;
  • the first discovery message is transparently transmitted between the upper layer and the MAC layer, and the priority of the first discovery message is determined according to whether the first discovery message is used for public safety;
  • the first discovery message is transmitted between the upper layer and the MAC layer through a logical channel, and the priority of the first discovery message is determined according to the logical channel and/or the corresponding bearer.
  • the priority of the first discovery message is determined according to the following:
  • the first message of the uplink UL is the first priority
  • the first message of the SL is the second priority
  • the second message of the UL and the second message of the SL are the third priority
  • the first priority is higher than or equal to The second priority
  • the second priority is higher than the third priority
  • the priority of the discovery message used for public safety is higher than or equal to the second priority, or higher than the third priority, or lower than the third priority;
  • the priority of the discovery message used for non-public safety is higher than the third priority or lower than the third priority
  • the priority of the discovery message for public safety is higher than the priority of the discovery message for non-public safety.
  • the priority of the discovery message used for public safety and the discovery message used for non-public safety in the discovery gap is higher than the third priority level.
  • the first discovery message includes indication information, and the indication information is used to indicate that the first discovery message is a discovery message for public safety or a discovery message for non-public safety or business.
  • the indication information is also used to indicate the discovery content of the first discovery message.
  • the first message of the UL includes: at least one of a random access message of the UL, an emergency communication message of the UL, and a first service message of the UL;
  • the second message of the UL The message is: a message in the UL except the first message of the UL;
  • the first message of the SL includes: radio resource control RRC signaling of the SL
  • the second message of the SL includes: at least one of the data of the SL and the PC5 signaling message of the SL
  • the first message of the SL includes: at least one of the RRC signaling of the SL and the PC5 signaling message of the SL
  • the second message of the SL includes: data of the SL.
  • the first message of the SL includes the RRC signaling of the SL and the PC5 signaling message of the SL:
  • the RRC signaling of the SL and the PC5 signaling message of the SL are transmitted through the same signaling radio bearer SRB, and the RRC signaling of the SL and the PC5 signaling message of the SL have the same priority; or
  • the RRC signaling of the SL and the PC5 signaling message of the SL are transmitted through different SRBs.
  • the SRB used for the PC5 signaling message of the SL is configured through the RRC signaling of the SL.
  • the PC5 signaling message of the SL is transmitted on the established SRB, and the priority of the RRC signaling of the SL is higher than that of the PC5 signaling message of the SL priority.
  • the priority of the first discovery message is the priority of the SRB or the control logical channel that transmits the first discovery message priority.
  • the first discovery message and the SL message are transmitted on the SRBs with different priorities of the control logical channel, and the first The priority of the discovery message is the priority of the SRB transmitting the first discovery message, and the message of the SL includes at least one of the RRC signaling of the SL and the PC5 signaling message of the SL.
  • the first discovery message is assigned a quality of service QoS parameter, the first discovery message is mapped by the terminal to a corresponding data logical channel according to the QoS parameter, and the priority of the first discovery message is to transmit the first discovery message.
  • the first discovery message is assigned a logical channel identifier LCID, and the priority of the first discovery message is the priority of the logical channel corresponding to the LCID.
  • the priority of the first discovery message is determined according to the following:
  • the first message of UL is the first priority
  • the first message of SL and the first discovery message are the second priority
  • the second message of UL and the second message of SL are the third priority
  • the second priority is higher than the third priority
  • the priority of the first discovery message is determined according to the following:
  • the first message of UL is the first priority
  • the first message of SL is the second priority
  • the second message of UL, the second message of SL, and the first discovery message are the third priority
  • the first priority is Higher than or equal to the second priority
  • the second priority is higher than the third priority.
  • transmitting the first discovery message between the upper layer and the MAC layer through a control logical channel refers to: transmitting the first discovery message between the upper layer and the MAC layer through the SRB;
  • the first message of the SL includes: RRC signaling of the SL and the PC5 signaling message of the SL, and the second message of the SL includes: data of the SL; or, the first message of the SL It includes: the RRC signaling of the SL, and the second message of the SL includes the data of the SL and the PC5 signaling message of the SL.
  • the first discovery message and the first message of the SL are transmitted through the same SRB, and the priority of the first discovery message and the first message of the SL are the same;
  • the first discovery message and the first message of the SL are transmitted on at least two SRBs, and the priority of the RRC signaling of the SL is higher than or equal to the priority of the first discovery message.
  • the priority of a discovery message is higher than or equal to the PC5 signaling message of the SL.
  • the first discovery message is transmitted on a first SRB
  • the RRC signaling of the SL is transmitted on the first SRB or the second SRB, and is used for the third part of the PC5 signaling message of the SL.
  • the SRB is configured through the RRC signaling of the SL, and if the establishment of the third SRB is completed, the PC5 signaling message of the SL is transmitted on the third SRB;
  • the first SRB and the second SRB have the highest priority in the control logical channel, and the priority of the third SRB is lower than the priority of the first SRB and the second SRB.
  • transmitting the first discovery message through a data logical channel between the upper layer and the MAC layer refers to: transmitting the first discovery message between the upper layer and the MAC layer through a data radio bearer DRB;
  • the first message of the SL includes: RRC signaling of the SL and the PC5 signaling message of the SL, and the second message of the SL includes: data of the SL; or, the first message of the SL It includes: the RRC signaling of the SL, and the second message of the SL includes the data of the SL and the PC5 signaling message of the SL.
  • the multiple messages of the third priority are transmitted on the DRB;
  • At least two of the multiple messages of the third priority have different priorities
  • the message with the higher priority is sent first or some of the multiple messages of the third priority are discarded first.
  • the second message of the UL and the second message of the SL have different priorities, where;
  • the second message of the UL has priority; if the priority of the second message of the UL is not higher than the first threshold , And the priority of the second message of the SL is higher than the second threshold, the second message of the SL has priority; if the priority of the second message of the UL is not higher than the first threshold Value, and the priority of the second message of the SL is not higher than the second threshold value, the second message of the UL has priority;
  • the second message of the SL has priority; if the priority of the second message of the SL is not higher than the first threshold , And the priority of the second message of the UL is higher than the second threshold, the second message of the UL has priority; if the priority of the second message of the SL is not higher than the first threshold, And the priority of the second message of the UL is not higher than the second threshold, the second message of the SL has priority;
  • the second message of the SL has priority, otherwise , the second message of the UL takes precedence
  • the second message of the UL takes precedence, otherwise , The second message of the SL takes precedence;
  • the second message of the SL takes precedence.
  • the second message of the UL takes precedence.
  • the SL The priority of the second message of the UL and the second message of the UL is determined by the terminal.
  • the priority of the second message of the SL is higher than the first threshold, and so The priority of the second message of the UL is not higher than the second threshold, and the second situation is: if the priority of the second message of the SL is not higher than the first threshold, and the The priority of the second message of the UL is higher than the second threshold.
  • the priority of sending the first discovery message is higher than the priority of receiving the first discovery message
  • the priority of sending the second message of the UL is higher than the priority of receiving the second message of the UL;
  • the priority of sending the second message of the SL is higher than the priority of receiving the second message of the SL.
  • the terminal provided by the embodiment of the present disclosure can implement each process implemented by the terminal in the method embodiment of FIG.
  • FIG. 5 is a structural diagram of another terminal provided by an embodiment of the present disclosure. As shown in FIG. 5, the terminal 500 includes:
  • the determining module 501 is configured to determine the priority of the UL message and the SL message according to the first threshold value and the second threshold value;
  • the processing module 502 is configured to perform transmission processing on the UL message and the SL message according to the priority of the UL message and the SL message.
  • the UL message and the SL message have different priorities, where;
  • the UL message takes precedence;
  • the SL message has priority; if the priority of the SL message is not higher than the first threshold, and the UL message is If the priority is higher than the second threshold, the UL message has priority; if the priority of the SL message is not higher than the first threshold, and the priority of the UL message is not higher than the second threshold , The SL message has priority;
  • the SL message has priority; otherwise, the UL message priority;
  • the UL message has priority; otherwise, the SL message priority;
  • the SL message takes precedence
  • the UL message takes precedence, except for the first case and the second case, the SL message and the UL message
  • the priority of is determined by the terminal, where in the first case: the priority of the SL message is higher than the first threshold, and the priority of the UL message is not higher than the second threshold Value, the second situation is: if the priority of the SL message is lower than the first threshold value, and the priority of the UL message is higher than the second threshold value.
  • the SL message includes: at least one of data of the SL, a PC5 signaling message of the SL, and a discovery message;
  • the UL message is a message other than a random access message, an emergency communication message, and a first service message in the UL.
  • the terminal provided in the embodiment of the present disclosure can implement the various processes implemented by the terminal in the method embodiment of FIG. 2. To avoid repetition, details are not described here, and the transmission performance of the terminal can be improved.
  • FIG. 6 is a schematic diagram of the hardware structure of a terminal that implements various embodiments of the present disclosure.
  • the terminal 600 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and a power supply 611 and other components.
  • a radio frequency unit 601 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and a power supply 611 and other components.
  • terminal structure shown in FIG. 6 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components.
  • terminals include, but are not limited to, mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-mounted terminals, robots, wearable devices, and ped
  • the radio frequency unit 601 is used to transmit the first discovery message of SL;
  • the first discovery message is transparently transmitted between the upper layer and the MAC layer, and the priority of the first discovery message is determined according to whether the first discovery message is used for public safety;
  • the first discovery message is transmitted between the upper layer and the MAC layer through a logical channel, and the priority of the first discovery message is determined according to the logical channel and/or the corresponding bearer.
  • the priority of the first discovery message is determined according to the following:
  • the first message of the uplink UL is the first priority
  • the first message of the SL is the second priority
  • the second message of the UL and the second message of the SL are the third priority
  • the first priority is higher than or equal to The second priority
  • the second priority is higher than the third priority
  • the priority of the discovery message used for public safety is higher than or equal to the second priority, or higher than the third priority, or lower than the third priority;
  • the priority of the discovery message used for non-public safety is higher than the third priority or lower than the third priority
  • the priority of the discovery message for public safety is higher than the priority of the discovery message for non-public safety.
  • the priority of the discovery message used for public safety and the discovery message used for non-public safety in the discovery gap is higher than the third priority level.
  • the first discovery message includes indication information, and the indication information is used to indicate that the first discovery message is a discovery message for public safety or a discovery message for non-public safety or business.
  • the indication information is also used to indicate the discovery content of the first discovery message.
  • the first message of the UL includes: at least one of a random access message of the UL, an emergency communication message of the UL, and a first service message of the UL;
  • the second message of the UL The message is: a message in the UL except the first message of the UL;
  • the first message of the SL includes: radio resource control RRC signaling of the SL
  • the second message of the SL includes: at least one of the data of the SL and the PC5 signaling message of the SL
  • the first message of the SL includes: at least one of the RRC signaling of the SL and the PC5 signaling message of the SL
  • the second message of the SL includes: data of the SL.
  • the first message of the SL includes the RRC signaling of the SL and the PC5 signaling message of the SL:
  • the RRC signaling of the SL and the PC5 signaling message of the SL are transmitted through the same signaling radio bearer SRB, and the RRC signaling of the SL and the PC5 signaling message of the SL have the same priority; or
  • the RRC signaling of the SL and the PC5 signaling message of the SL are transmitted through different SRBs.
  • the SRB used for the PC5 signaling message of the SL is configured through the RRC signaling of the SL.
  • the PC5 signaling message of the SL is transmitted on the established SRB, and the priority of the RRC signaling of the SL is higher than that of the PC5 signaling message of the SL priority.
  • the priority of the first discovery message is the priority of the SRB or the control logical channel that transmits the first discovery message priority.
  • the first discovery message and the SL message are transmitted on the SRBs with different priorities of the control logical channel, and the first The priority of the discovery message is the priority of the SRB transmitting the first discovery message, and the message of the SL includes at least one of the RRC signaling of the SL and the PC5 signaling message of the SL.
  • the first discovery message is assigned a quality of service QoS parameter, the first discovery message is mapped by the terminal to a corresponding data logical channel according to the QoS parameter, and the priority of the first discovery message is to transmit the first discovery message.
  • the first discovery message is assigned a logical channel identifier LCID, and the priority of the first discovery message is the priority of the logical channel corresponding to the LCID.
  • the priority of the first discovery message is determined according to the following:
  • the first message of UL is the first priority
  • the first message of SL and the first discovery message are the second priority
  • the second message of UL and the second message of SL are the third priority
  • the second priority is higher than the third priority
  • the priority of the first discovery message is determined according to the following:
  • the first message of UL is the first priority
  • the first message of SL is the second priority
  • the second message of UL, the second message of SL, and the first discovery message are the third priority
  • the first priority is Higher than or equal to the second priority
  • the second priority is higher than the third priority.
  • transmitting the first discovery message between the upper layer and the MAC layer through a control logical channel refers to: transmitting the first discovery message between the upper layer and the MAC layer through the SRB;
  • the first message of the SL includes: RRC signaling of the SL and the PC5 signaling message of the SL, and the second message of the SL includes: data of the SL; or, the first message of the SL It includes: the RRC signaling of the SL, and the second message of the SL includes the data of the SL and the PC5 signaling message of the SL.
  • the first discovery message and the first message of the SL are transmitted through the same SRB, and the priority of the first discovery message and the first message of the SL are the same;
  • the first discovery message and the first message of the SL are transmitted on at least two SRBs, and the priority of the RRC signaling of the SL is higher than or equal to the priority of the first discovery message.
  • the priority of a discovery message is higher than or equal to the PC5 signaling message of the SL.
  • the first discovery message is transmitted on a first SRB
  • the RRC signaling of the SL is transmitted on the first SRB or the second SRB, and is used for the third part of the PC5 signaling message of the SL.
  • the SRB is configured through the RRC signaling of the SL, and if the establishment of the third SRB is completed, the PC5 signaling message of the SL is transmitted on the third SRB;
  • the first SRB and the second SRB have the highest priority in the control logical channel, and the priority of the third SRB is lower than the priority of the first SRB and the second SRB.
  • transmitting the first discovery message through a data logical channel between the upper layer and the MAC layer refers to: transmitting the first discovery message between the upper layer and the MAC layer through a data radio bearer DRB;
  • the first message of the SL includes: RRC signaling of the SL and the PC5 signaling message of the SL, and the second message of the SL includes: data of the SL; or, the first message of the SL It includes: the RRC signaling of the SL, and the second message of the SL includes the data of the SL and the PC5 signaling message of the SL.
  • the multiple messages of the third priority are transmitted on the DRB;
  • At least two of the multiple messages of the third priority have different priorities
  • the message with the higher priority is sent first or some of the multiple messages of the third priority are discarded first.
  • the second message of the UL and the second message of the SL have different priorities, where;
  • the second message of the UL has priority; if the priority of the second message of the UL is not higher than the first threshold , And the priority of the second message of the SL is higher than the second threshold, the second message of the SL has priority; if the priority of the second message of the UL is not higher than the first threshold Value, and the priority of the second message of the SL is not higher than the second threshold value, the second message of the UL has priority;
  • the second message of the SL has priority; if the priority of the second message of the SL is not higher than the first threshold , And the priority of the second message of the UL is higher than the second threshold, the second message of the UL has priority; if the priority of the second message of the SL is not higher than the first threshold, And the priority of the second message of the UL is not higher than the second threshold, the second message of the SL has priority;
  • the second message of the SL has priority, otherwise , the second message of the UL takes precedence
  • the second message of the UL takes precedence, otherwise , The second message of the SL takes precedence;
  • the second message of the SL takes precedence.
  • the second message of the UL takes precedence.
  • the SL The priority of the second message of the UL and the second message of the UL is determined by the terminal.
  • the priority of the second message of the SL is higher than the first threshold, and so The priority of the second message of the UL is not higher than the second threshold, and the second situation is: if the priority of the second message of the SL is not higher than the first threshold, and the The priority of the second message of the UL is higher than the second threshold.
  • the priority of sending the first discovery message is higher than the priority of receiving the first discovery message
  • the priority of sending the second message of the UL is higher than the priority of receiving the second message of the UL;
  • the priority of sending the second message of the SL is higher than the priority of receiving the second message of the SL.
  • the above-mentioned terminal improves the discovery effect of the terminal.
  • the processor 610 is configured to determine the priority of the UL message and the SL message according to the first threshold value and the second threshold value;
  • the radio frequency unit 601 is configured to perform transmission processing on the UL message and the SL message according to the priority of the UL message and the SL message.
  • the UL message and the SL message have different priorities, where;
  • the UL message takes precedence;
  • the SL message has priority; if the priority of the SL message is not higher than the first threshold, and the UL message is If the priority is higher than the second threshold, the UL message has priority; if the priority of the SL message is not higher than the first threshold, and the priority of the UL message is not higher than the second threshold , The SL message has priority;
  • the SL message has priority; otherwise, the UL message priority;
  • the UL message has priority; otherwise, the SL message priority;
  • the SL message takes precedence
  • the UL message takes precedence, except for the first case and the second case, the SL message and the UL message
  • the priority of is determined by the terminal, where in the first case: the priority of the SL message is higher than the first threshold, and the priority of the UL message is not higher than the second threshold Value, the second situation is: if the priority of the SL message is lower than the first threshold value, and the priority of the UL message is higher than the second threshold value.
  • the SL message includes: at least one of data of the SL, a PC5 signaling message of the SL, and a discovery message;
  • the UL message is a message other than a random access message, an emergency communication message, and a first service message in the UL.
  • the above-mentioned terminal improves the transmission performance of the terminal.
  • the radio frequency unit 601 can be used for receiving and sending signals in the process of sending and receiving information or talking. Specifically, after receiving the downlink data from the base station, it is processed by the processor 610; Uplink data is sent to the base station.
  • the radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the radio frequency unit 601 can also communicate with the network and other devices through a wireless communication system.
  • the terminal provides users with wireless broadband Internet access through the network module 602, such as helping users to send and receive emails, browse web pages, and access streaming media.
  • the audio output unit 603 can convert the audio data received by the radio frequency unit 601 or the network module 602 or stored in the memory 609 into audio signals and output them as sounds. Moreover, the audio output unit 603 may also provide audio output related to a specific function performed by the terminal 600 (for example, call signal reception sound, message reception sound, etc.).
  • the audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.
  • the input unit 604 is used to receive audio or video signals.
  • the input unit 604 may include a graphics processing unit (GPU) 6041 and a microphone 6042.
  • the graphics processor 6041 is configured to monitor images of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode.
  • the data is processed.
  • the processed image frame may be displayed on the display unit 606.
  • the image frame processed by the graphics processor 6041 may be stored in the memory 609 (or other storage medium) or sent via the radio frequency unit 601 or the network module 602.
  • the microphone 6042 can receive sound, and can process such sound into audio data.
  • the processed audio data can be converted into a format that can be sent to the mobile communication base station via the radio frequency unit 601 for output in the case of a telephone call mode.
  • the terminal 600 also includes at least one sensor 605, such as a light sensor, a motion sensor, and other sensors.
  • the light sensor includes an ambient light sensor and a proximity sensor.
  • the ambient light sensor can adjust the brightness of the display panel 6061 according to the brightness of the ambient light.
  • the proximity sensor can close the display panel 6061 and/or when the terminal 600 is moved to the ear. Or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when stationary, and can be used to identify terminal gestures (such as horizontal and vertical screen switching, related games, Magnetometer attitude calibration), vibration recognition related functions (such as pedometer, percussion), etc.; sensor 605 can also include fingerprint sensor, pressure sensor, iris sensor, molecular sensor, gyroscope, barometer, hygrometer, thermometer, infrared Sensors, etc., will not be repeated here.
  • the display unit 606 is used to display information input by the user or information provided to the user.
  • the display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • the user input unit 607 may be used to receive inputted number or character information, and generate key signal input related to user settings and function control of the terminal.
  • the user input unit 607 includes a touch panel 6071 and other input devices 6072.
  • the touch panel 6071 also called a touch screen, can collect user touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on the touch panel 6071 or near the touch panel 6071. operating).
  • the touch panel 6071 may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the user's touch position, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 610, the command sent by the processor 610 is received and executed.
  • the touch panel 6071 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave.
  • the user input unit 607 may also include other input devices 6072.
  • other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackball, mouse, and joystick, which are not described here.
  • the touch panel 6071 can cover the display panel 6061.
  • the touch panel 6071 detects a touch operation on or near it, it is transmitted to the processor 610 to determine the type of the touch event, and then the processor 610 determines the type of the touch event according to the touch.
  • the type of event provides corresponding visual output on the display panel 6061.
  • the touch panel 6071 and the display panel 6061 are used as two independent components to realize the input and output functions of the terminal, in some embodiments, the touch panel 6071 and the display panel 6061 can be integrated. Realize the input and output functions of the terminal, the specifics are not limited here.
  • the interface unit 608 is an interface for connecting an external device with the terminal 600.
  • the external device may include a wired or wireless headset port, an external power source (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) port, video I/O port, headphone port, etc.
  • the interface unit 608 can be used to receive input (for example, data information, power, etc.) from an external device and transmit the received input to one or more elements in the terminal 600 or can be used to communicate between the terminal 600 and the external device. Transfer data between.
  • the memory 609 can be used to store software programs and various data.
  • the memory 609 may mainly include a storage program area and a storage data area.
  • the storage program area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data created by the use of mobile phones (such as audio data, phone book, etc.), etc.
  • the memory 609 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the processor 610 is the control center of the terminal. It uses various interfaces and lines to connect various parts of the entire terminal. It executes by running or executing software programs and/or modules stored in the memory 609, and calling data stored in the memory 609. Various functions of the terminal and processing data, so as to monitor the terminal as a whole.
  • the processor 610 may include one or more processing units; optionally, the processor 610 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, application programs, etc., and the modem
  • the adjustment processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 610.
  • the terminal 600 may also include a power supply 611 (such as a battery) for supplying power to various components.
  • a power supply 611 such as a battery
  • the power supply 611 may be logically connected to the processor 610 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system. And other functions.
  • the terminal 600 includes some functional modules not shown, which will not be repeated here.
  • an embodiment of the present disclosure further provides a terminal, including a processor 610, a memory 609, and a computer program stored on the memory 609 and running on the processor 610.
  • a terminal including a processor 610, a memory 609, and a computer program stored on the memory 609 and running on the processor 610.
  • the computer program is executed by the processor 610,
  • Each process of the message transmission message method provided by the embodiment shown in FIG. 2 or FIG. 3 is implemented, and the same technical effect can be achieved. In order to avoid repetition, details are not repeated here.
  • the embodiment of the present disclosure also provides a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium.
  • a computer program is stored on the computer-readable storage medium.
  • the computer program is executed by a processor, the message transmission message provided by the embodiment shown in FIG. 2 or FIG. 3 is realized.
  • the computer-readable storage medium such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.
  • the technical solution of the present disclosure essentially or the part that contributes to the related technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk). ) Includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present disclosure.
  • a terminal which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.

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Abstract

本公开实施例提供一种消息传输方法和终端，该方法包括：传输副链路(SL)的第一发现(discovery)消息；其中，在上层和MAC层之间透传第一discovery消息，第一discovery消息的优先级依据第一discovery消息是否用于公共安全确定；或者在上层和MAC层之间通过逻辑信道传输第一discovery消息，第一discovery消息的优先级依据逻辑信道和/或对应的承载确定。

Description

消息传输方法和终端
相关申请的交叉引用
本申请主张在2019年9月6日在中国提交的中国专利申请号No.201910843890.5的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种消息传输方法和终端。
背景技术
目前通信系统支持副链路(sidelink，SL，或译为旁链路或者直连链路)通信，在sidelink通信中终端之间可以直接进行数据传输。且在一些通信系统中计划引入发现(discovery)消息，该discovery消息可以用于发现设备，例如：发现终端发现周围有可以直连的终端。但是一些相关技术中仅是计划引入discovery消息，但还无法实现discovery消息的传输，从而使得终端的发现效果比较差。
发明内容
本公开实施例提供一种消息传输方法和终端，以解决终端的发现效果比较差的问题。
第一方面，本公开实施例提供一种消息传输方法，应用于终端，包括：
传输SL的第一discovery消息；
其中，在上层和媒体接入控制(Media Access Control，MAC)层之间透传所述第一discovery消息，所述第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全确定；或者
在上层和MAC层之间通过逻辑信道传输所述第一discovery消息，所述第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定。
第二方面，本公开实施例提供一种消息传输方法，应用于终端，包括：
依据第一门限值和第二门限值，确定UL消息和SL消息的优先级；
依据所述UL消息和所述SL消息的优先级，对所述UL消息和所述SL消息进行传输处理。
第三方面，本公开实施例提供一种终端，包括：
传输模块，用于传输SL的第一discovery消息；
其中，在上层和MAC层之间透传所述第一discovery消息，所述第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全确定；或者
在上层和MAC层之间通过逻辑信道传输所述第一discovery消息，所述第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定。
第四方面，本公开实施例提供一种终端，包括：
确定模块，用于依据第一门限值和第二门限值，确定UL消息和SL消息的优先级；
处理模块，用于依据所述UL消息和所述SL消息的优先级，对所述UL消息和所述SL消息进行传输处理。
第五方面，本公开实施例提供一种终端，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现上述第一方面提供的消息传输方法中的步骤，或者，所述程序被所述处理器执行时实现上述第二方面提供的消息传输方法中的步骤。
第六方面，本公开实施例提供一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现上述第一方面提供的消息传输方法中的步骤，或者所述计算机程序被处理器执行时实现上述第二方面提供的消息传输方法中的步骤。
本公开实施例中，传输SL的第一discovery消息；其中，在上层和MAC层之间透传所述第一discovery消息，所述第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全确定；或者在上层和MAC层之间通过逻辑信道传输所述第一discovery消息，所述第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定。由于支持discovery消息，从而提高终端的发现效果。
附图说明
图1是本公开实施例可应用的一种网络系统的结构图；
图2是本公开实施例提供的一种消息传输方法的流程图；
图3是本公开实施例提供的另一种消息传输方法的流程图；
图4是本公开实施例提供的一种终端的结构图；
图5是本公开实施例提供的另一种终端的结构图；
图6是本公开实施例提供的另一种终端的结构图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本申请的说明书和权利要求书中的术语“包括”以及它的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。此外，说明书以及权利要求中使用“和/或”表示所连接对象的至少其中之一，例如A和/或B，表示包含单独A，单独B，以及A和B都存在三种情况。
在本公开实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本公开实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更可选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
下面结合附图介绍本公开的实施例。本公开实施例提供的消息传输方法和终端可以应用于无线通信系统中。该无线通信系统可以为5G系统，或者演进型长期演进(Evolved Long Term Evolution，eLTE)系统或者长期演进(Long Term Evolution，LTE)系统，或者后续演进通信系统等。
请参见图1，图1是本公开实施例可应用的一种网络系统的结构图，如图1所示，包括终端11、终端12和控制节点13，其中，终端11和终端12之间可以通过PC5接口并使用sidelin(SL)通信，控制节点13和终端(包含终端11和终端12)之间可以通过空口(Uu)接口并使用上下行链路(uplink and downlink)进行通信。终端11和终端12可以是用户终端(User Equipment，UE)或者其他终端侧设备，例如：手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)、个人数字助理(personal digital assistant，PDA)、移动上网装置(Mobile Internet Device，MID)、可穿戴式设备(Wearable Device)、智能汽车、车载设备或者机器人等终端侧设备，需要说明的是，在本公开实施例中并不限定终端的具体类型。上述控制节点13可以是网络设备，例如：4G基站，或者5G基站，或者以后版本的基站，或者其他通信系统中的基站，或者称之为节点B，演进节点B，或者传输接收点(Transmission Reception Point，TRP)，或者接入点(Access Point，AP)，或者所述领域中其他词汇，只要达到相同的技术效果，所述网络设备不限于特定技术词汇。或者，上述控制节点13可以是一些集成接入回程节点(Integrated Access Backhaul，IAB)，还可以是一些sidelink终端、中继(relay)，路边单元(Road Side Unit，RSU)，当然，也可以是一些类似RSU或者IAB的其他网络设施。
请参见图2，图2是本公开实施例提供的一种消息传输方法的流程图，该方法应用于终端，如图2所示，包括以下步骤：
步骤201、传输SL的第一discovery消息；
其中，在上层和MAC层之间透传所述第一discovery消息，所述第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全确定；或者
在上层和MAC层之间通过逻辑信道传输所述第一discovery消息，所述第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定。
其中，上述传输SL的第一discovery消息可以是在SL上发送第一discovery消息，或者可以是，在SL上接收第一discovery消息。
另外，上述第一discovery消息可以是进行发现的终端发送的discovery消息，或者被发现的终端发送的discovery消息；如请求发现，即发送该消 息终端通过该消息来请求发现其他设备，或者主动(如广播)发现，即发送该消息的终端主动告诉其他设备。
另外，上述第一discovery消息可以是discovery相关消息，可以用于多种用途的各类发现的相关消息。例如：用于网络控制交互服务(Network Controlled Interactive Services，NCIS)相关业务中的组发现、用于其他业务中的组发现、用于中继发现(包括终端到网络中继，和终端到终端中继)或者用于终端发现等相关的消息。具体的，上述第一discovery消息可以是通信协议中已定义的discovery相关消息，或者后续协议版本新定义的discovery相关消息。
而上述在上层和MAC层之间透传所述第一discovery消息可以是，第一discovery消息由上层透传到MAC层，或者第一discovery消息由MAC层透传到上层。也就是说，接入层(access stratum，AS)层协议栈只包括MAC层和物理层，第一discovery消息没有对应的逻辑信道。该情况下，第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全(public safety)确定，例如：用于公共安全的discovery消息的优先级高于用于非公共安全的discovery消息的优先级。
而上述在上层和MAC层之间通过逻辑信道传输所述第一discovery消息可以是，第一discovery消息由上层通过逻辑信道传输到MAC层，或者第一discovery消息由MAC层通过逻辑信道传输到上层。也就是说，AS层协议栈除了MAC层和物理层之外，还可以包括分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)层和无线链路层控制(Radio Link Control，RLC)层。其中，逻辑信道可以是数据逻辑信道，该数据逻辑信道可以包括副链路业务信道(Sidelink Traffic Channel，STCH)；或者上述逻辑信道可以是信令逻辑信道，该信令逻辑信道可以包括副链路控制信道(Sidelink Control Channel，SCCH)。在该情况下，第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定，例如：第一discovery消息的优先级跟随该逻辑信道或者对应的承载，或者第一discovery消息的优先级由该逻辑信道和对应的承载确定，如该逻辑信道和对应的承载的优先级不一致时，选择其中一个优先级作为第一discovery消息的优先级。另外，上述对应的承 载可以是传输上述discovery消息的承载。
另外，上述第一discovery消息传输到MAC层之后，可以是通过物理信道进行传输，或者从物理信道接收到上述第一discovery消息后传输到MAC层。
本公开实施例中，通过上述步骤可以实现discovery消息的传输，从而可以使得终端进行发现，以提高终端的发现效果。另外，上述传输SL的第一发现discovery消息可以是，依据第一发现discovery消息的优先级进行传输。
作为一种可选的实施方式，在上层和MAC层之间透传所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
上行链路(Uplink，UL)的第一消息为第一优先级，SL的第一消息为第二优先级，UL的第二消息和SL的第二消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级；
其中，用于公共安全的discovery消息的优先级高于或者等于所述第二优先级，或者高于所述第三优先级，或者低于所述第三优先级；
用于非公共安全的discovery消息的优先级高于所述第三优先级，或者低于所述第三优先级；
所述用于公共安全的discovery消息的优先级高于所述用于非公共安全的discovery消息的优先级。
需要说明的是，上述用于公共安全的discovery消息的优先级高于所述用于非公共安全的discovery消息的优先级可以是，用于公共安全的discovery消息的优先级始终高于用于非公共安全的discovery消息。例如：在用于公共安全的discovery消息低于第三优先级，且用于非公共安全的discovery消息低于第三优先级的情况下，用于非公共安全的discovery消息比用于公共安全的discovery消息的优先级更低，如用于非公共安全的discovery消息的优先级为第五优先级，而用于公共安全的discovery消息的优先级为第四优先级，第四优先级比第五优先级高。
上述用于公共安全的discovery消息的优先级高于或者等于所述第二优先级可以是，低于或者等于第一优先级但高于或者等于所述第二优先级，上 述用于公共安全的discovery消息的优先级高于所述第三优先级可以是，低于或者等于第二优先级但高于第三优先级。
上述用于非公共安全的discovery消息的优先级高于所述第三优先级可以是，低于或者等于上述第二优先级，但高于第三优先级。
通过上述优先级的定义，可以使得终端能优先进行重要消息的发送或接收，使通信系统的整体表现更好。
例如：第一discovery消息透传到MAC层，通过MAC层进行资源调度后再通过物理信道)传输，物理副链路发现信道(Physical Sidelink Discovery Channel，PSDCH)传输。此时discovery消息与其他消息的优先级顺序，这种顺序可能直接由网络配置或在协议中规定。在不考虑考虑发现间隔(SL discovery gap)的情况下，一种可能的顺序如下：
第一优先级：Uu口RACH随机接入的传输和对于紧急PDU连接相关的传输
第二优先级：Uu口非RACH相关的数据传输、SL PC5口相关数据传输(基于综合考虑两者的QoS)
第三优先级：SL PC5口发现相关消息传输。
可选的，在所述SL配置有发现间隔(discovery gap)的情况下，在所述discovery gap内用于公共安全的discovery消息和用于非公共安全的discovery消息的优先级高于所述第三优先级。
其中，上述discovery gap可以是用于discovery消息发送和接收的间隔。
其中，上述在所述discovery gap内用于公共安全的discovery消息和用于非公共安全的discovery消息的优先级高于所述第三优先级可以是，用于公共安全的discovery消息高于第三优级，但低于第一优先级或者第二优先级，当然，也可以是在该gap优先级最高，用于非公共安全的discovery消息高于第三优级，但低于第一优先级或者第二优先级。
该实施方式中，可以实现在上述discovery gap可以优先传输discovery消息。
可选的，在所述第一discovery消息包括指示信息，所述指示信息用于 指示所述第一discovery消息为用于公共安全的discovery消息或者为用于非公共安全或商业(commercial)的discovery消息。
其中，上述指示信息可以理解为，用于指示第一discovery消息的类型，例如：指示第一discovery消息为用于公共安全，或者指示第一discovery消息用于非公共安全或商业，其中，用于商业的discovery消息也可以属于用于非公共安全的discovery消息。也就是说，上述用于非公共安全的discovery消息可以是，上述指示信息指示其为用于非安全的发现或者商业(commercial)。
进一步的，所述指示信息还可以用于指示所述第一discovery消息的发现内容。
其中，该发现内容可以是指该discovery消息用于NCIS相关业务中的组发现、用于其他业务中的组发现、用于中继发现(包括终端到网络中继，和终端到终端中继)或者用于终端发现等。
该实施方式，通过上述指示信息可以指示上述第一discovery消息类型和发现内容，从而使得终端可以准确地确认其优先级。
可选的，所述UL的第一消息包括：所述UL的随机接入消息、所述UL的紧急通信消息和所述UL的第一业务消息中的至少一项；所述UL的第二消息为：所述UL中除所述UL的第一消息之外的消息。
上述随机接入消息可以是随机接入信道(Random Access Channel，RACH)的随机接入消息，例如：msg1或者msg 3(或者msgA)。而上述紧急通信消息可以是紧急协议数据单元(Protocol Data Unit，PDU)等协议中定义的紧急通信消息。
上述第一业务消息可以是一些特殊业务的消息，例如：高可靠低延迟通信(Ultra Reliable Low Latency Communications，URLLC)之类业务的消息，具体可以是预定义的业务。
而上述UL的第二消息可以是，第一业务消息之外的其他业务，如第二业务消息，第二业务消息可以是增强型移动宽带(Enhance Mobile Broadband，eMBB)的相关消息或者海量机器类通信(Massive Machine Type Communication，mMTC)的相关消息等。进一步的，上述UL的第二消息可以 是UL的数据。
需要说明的是，本公开实施例中的消息可以是数据或者信令。另外，消息的优先级可以是该消息传输的优先级。
可选的，所述SL的第一消息包括：所述SL的无线资源控制(Radio Resource Control，RRC)信令，所述SL的第二消息包括：所述SL的数据和所述SL的PC5信令消息(PC5-S message)中的至少一项；或者，所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息中的至少一项，所述SL的第二消息包括：所述SL的数据。
其中，上述RRC信令可以是RRC相关信令。
需要说明的是，本公开实施例中，UL的消息或者数据也可以称作Uu口的消息或者数据，而SL的消息或者数据也可以称作PC5口的消息或者数据。
可选的，在所述SL的第一消息包括所述SL的RRC信令和所述SL的PC5信令消息的情况下：
所述SL的RRC信令和所述SL的PC5信令消息通过同一信令无线承载(signalling radio bearers，SRB)传输，且所述SL的RRC信令和所述SL的PC5信令消息的优先级相同；或者
所述SL的RRC信令和所述SL的PC5信令消息通过不同的SRB传输，其中，用于所述SL的PC5信令消息的SRB通过SL的RRC信令配置，若用于所述SL的PC5信令消息的SRB建立完成，则所述SL的PC5信令消息在所述建立的SRB上传输，且所述SL的RRC信令的优先级高于所述SL的PC5信令消息的优先级。
例如：终端的SL PC5上只有一个SRB(如默认的SRB)，那么SL的RRC信令和SL的PC5信令消息为相同优先级。
如果不止一个SRB，可以考虑将SL的RRC信令和SL的PC5信令消息放在不同的SRB上，其中，优先级SL的RRC信令>SL的PC5信令消息。另外，若用于SL的PC5信令消息的SRB通过SL的RRC信令进行配置，当专用于PC5信令消息的SRB建立完成后，PC5信令消息在该新建的SRB上进行传输。
该实施方式中，可以实现终端在传输SL的PC5信令消息和SL的RRC信令可以根据相应的优先级进行传输。
需要说明的是，上述配置用于所述SL的PC5信令消息的SRB的SL的RRC信令并不限定是上述SL的第一消息包括的RRC信令，即可以是SL的第一消息包括的RRC信令也可以不是。也就是说，可以用于配置PC5信令消息的SRB不一定是由上述SL的第一消息包括的RRC信令配置的，SL RRC有很多种，在SRB上传输的RRC不一定都用于配置SRB。
可选的，所述第三优先级的多个消息在数据无线承载(Data Radio Bearer，DRB)上传输；
所述第三优先级的多个消息中至少两项的优先级不同；
当无法同时发送所述第三优先级的多个消息时，根据优先级顺序，优先发送优先级高的消息或优先丢弃所述第三优先级的多个消息中的部分消息。
其中，上述第三优先级的多个消息可以是SL的第二消息和UL的第二消息，例如：UL的数据、SL的数据和SL的PC5信令消息，其中，UL的数据可以是非RACH随机接入传输和紧急通信相关的传输的数据，具体可以是取决于数据服务质量(Quality of Service，QoS)。
以上述三者为例，由于三者全部在数据信道上进行传输，因此可以给SL的PC5信令消息分配特殊的逻辑信道标识(Logical Channel Identifier，LCID)或QoS相关参数，其中，QoS相关参数可以包括服务质量流ID(QoS Flow ID，QFI)、用于PC5的服务质量流ID(PC5 QoS flow ID，PFI)、用于PC5的QoS标识(PC5 QoS identifier，PQI)中的至少一项。其中，PQI也可能叫做VQI(V2X QoS flow ID)。这样，当终端无法同时发送三者时，根据优先级顺序，优先传输优先级高的，或者优先丢弃优先级较低的一者或两者。
该实施方式中，可以实现终端在传输上述第三优先级的消息时，优先传输优先级高的消息或优先丢弃所述第三优先级的多个消息中的部分消息，以提高终端的传输性能。
可选的，所述UL的第二消息和所述SL的第二消息的优先级不同，其中；
如果所述UL的第二消息的优先级高于第一门限值，则所述UL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息的优先级高于第二门限值，则所述SL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息 的优先级不高于所述第二门限值，则所述UL的第二消息优先；
或者，
如果所述SL的第二消息的优先级高于第一门限值，则所述SL的第二消息优先；如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先；如果所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，则所述SL的第二消息优先；
或者，
如果所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，则所述SL的第二消息优先，否则，所述UL的第二消息优先；
或者，
如果所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先，否则，所述SL的第二消息优先；
或者，
在第一情况下，所述SL的第二消息优先，在第二情况下，所述UL的第二消息优先，除所述第一情况和所述第二情况之外的情况，所述SL的第二消息和所述UL的第二消息的优先由所述终端决定，其中，所述第一情况下是：所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，所述第二情况是：如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于所述第二门限值。
其中，上述不高于或者低于或者等于。
其中，上述第一门限值和第二门限值可以是网络侧配置或预配置的，且上述第一门限值可以大于上述第二门限值，或者第二门限值可以大于上述第一门限值。另外，上述实施方式中，可以是先进行第一门限值的判断，之后，再进行第二门限值的判断，当然，在一些实施方式中，也可以同时使用这两个门限值进行判断，例如：在所述SL的第二消息的优先级低于第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先 的实施方式，可以两个门限值同时判断。
上述如果所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级低于第二门限值，则所述SL的第二消息优先，否则，所述UL的第二消息优先可以是，如果SL的第二消息的优先级足够大且UL的第二消息的优先级足够小，则优先SL传输；否则优先UL传输。
上述如果所述SL的第二消息的优先级低于第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先，否则，所述SL的第二消息优先可以是，如果SL的第二消息的优先级足够小且UL的第二消息的优先级足够大，则优先UL传输；否则优先SL传输。
上述除所述第一情况和所述第二情况之外的情况，所述SL的第二消息和所述UL的第二消息的优先由所述终端决定可以是，如果SL的第二消息的优先级足够大且UL的第二消息的优先级足够小，则优先SL传输，如果SL的第二消息的优先级足够小且UL的第二消息的优先级足够大，则优先UL传输，而其余留给终端实现，即由终端决定。
需要说明的是，本公开实施例中，各消息的优先级可以为网络侧配置或预配置的UL逻辑信道(Logical Channel，LCH)优先级(priority)、SL LCH priority，近距离通信数据分组优先级(ProSe Per-Packet Priority，PPPP)、用于PC5的QoS标识(PC5 QoS identifier,PQI)或者用于5G Uu的QoS标识(5G QoS identifier,5QI)，或PQI/5QI中的priority域。
作为一种可选的实施方式，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级为传输所述第一discovery消息的SRB或控制逻辑信道的优先级。
其中，上述SRB可以是在控制逻辑信道上传输，且该控制逻辑信道可以传输一个或者多个SRB。即使控制逻辑信道只有一个SRB，第一discovery消息的优先级也可以由SRB的优先级确定，但SRB的优先级可能由控制逻辑信道确定。
该实施方式中，可以实现第一discovery消息通过控制逻辑信道传输的情况下，discovery消息的优先级为传输所述第一discovery消息的SRB或控制逻辑信道的优先级。
例如：第一discovery消息通过SCCH传输，此时，Discovery相关消息和SL的RRC信令(或者称作PC5-RRC消息)一样，都在SCCH上传输。此时第一discovery消息的优先级跟随SCCH逻辑信道或相应SRB的优先级。如，由于SCCH大概率和Uu口的CCCH类似，传输的是信令消息，拥有最高优先级(如优先级1)，因此，第一discovery消息也相应拥有最高优先级。另外，如果有不同优先级的SRB，还可以进一步考虑将第一discovery消息与PC5-RRC消息或PC5信令消息(PC5-S消息)(如果PC5-S消息也放在SRB上传的话)放在不同优先级的SRB上，来实现对优先级的进一步细分。
一种方式可以是：在所述控制逻辑信道包括不同优先级的SRB的情况下，所述第一discovery消息和SL的消息可以在所述控制逻辑信道的不同优先级的SRB上传输，且所述第一discovery消息的优先级为传输所述第一discovery消息的SRB的优先级，所述SL的消息包括所述SL的RRC信令和所述SL的PC5信令消息中的至少一项。
这样可以实现更加合理的优先级划分，以提高终端的传输性能。
作为一种可选的实施方式，在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息的情况下：
所述第一discovery消息分配有QoS参数，所述第一discovery消息被所述终端依据所述QoS参数映射至相应的数据逻辑信道，所述第一discovery消息的优先级为传输所述第一discovery消息的DRB或数据逻辑信道的优先级；或者
所述第一discovery消息分配有LCID，所述第一discovery消息的优先级为所述LCID对应的逻辑信道的优先级。
其中，上述QoS参数可以是与QoS相关的参数，例如：QFI、PFI、PQI和VQI中的至少一项。另外，上述QoS参数可以是终端配置给第一discovery消息，或者网络配置或者协议约定的。
例如：给第一discovery消息分配QoS相关参数(QFI/PFI,PQI/VQI)，第一discovery消息通过终端侧QoS规则映射到不同的逻辑信道，基于逻辑信道的优先级和其他数据进行比较，其中，该实施方式的参数和映射方式等可以基于预先定义，或者网络配置等多种方式实现。
其中，上述DRB可以是在上述数据逻辑信道上传输，且该数据逻辑信道可以传输一个或者多个DRB。即使数据逻辑信道只有一个DRB，第一discovery消息的优先级也可以由DRB的优先级确定，但DRB的优先级可能由控制逻辑信道确定。
另外，上述LCID对应的逻辑信道的优先级也可以理解为该LCID的优先级。另外，该可以对应某类特殊的优先级，即给第一discovery消息分配LCID，该LCID对应某类特殊的优先级。
另外，上述第一discovery消息的优先级也可以参见前面实施方式中描述的与其他消息的优先级，此处不作赘述。
作为一种可选的实施方式，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
UL的第一消息为第一优先级，SL的第一消息和所述第一discovery消息为第二优先级，UL的第二消息和SL的第二消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级；
或者，
在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
UL的第一消息为第一优先级，SL的第一消息为第二优先级，UL的第二消息、SL的第二消息和所述第一discovery消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级。
其中，上述UL的第一消息和第二消息可以参见上面实施方式的说明，此处不作赘述。
该实施方式中，可以实现在通过控制逻辑信道和数据逻辑信道传输时，定义相应的优先级，以实现合理的传输。
在一种实现方式中：在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息可以是指：在上层和MAC层之间通过SRB传输所述第一discovery消息；
所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息， 所述SL的第二消息包括：所述SL的数据；或者，所述SL的第一消息包括：所述SL的RRC信令，所述SL的第二消息包括所述SL的数据和所述SL的PC5信令消息。
其中，上述SL的第一消息和第二消息可以参见上面实施方式的说明，此处不作赘述。
可选的，所述第一discovery消息和所述SL的第一消息可以通过同一SRB传输，且所述第一discovery消息和所述SL的第一消息的优先级相同；或者
所述第一discovery消息和所述SL的第一消息可以在至少两个SRB上传输，且所述SL的RRC信令的优先级高于或者等于所述第一discovery消息的优先级，所述第一discovery消息的优先级高于或者等于所述SL的PC5信令消息。
例如：如果SL PC5上只有一个SRB(如默认的SRB)，那么SL的RRC信令和SL的PC5信令消息，以及第一discovery相关消息为相同优先级。如果不止一个SRB，可以考虑将SL的RRC信令，SL的PC5信令消息和第一discovery消息放在两个或三个不同的SRB上，优先级：RRC信令>＝第一discovery相关消息>PC5信令消息。
可选的，所述第一discovery消息在第一SRB上传输，所述SL的RRC信令在所述第一SRB或者第二SRB上传输，用于所述SL的PC5信令消息的第三SRB通过SL的RRC信令配置，若所述第三SRB建立完成，则所述SL的PC5信令消息在所述第三SRB上传输；
其中，所述第一SRB和所述第二SRB在所述控制逻辑信道中优先级最高，所述第三SRB的优先级低于所述第一SRB和所述第二SRB的优先级。
需要说明的是，上述第三SRB的SL的RRC信令并不限定是上述SL的第一消息包括的RRC信令，即可以是SL的第一消息包括的RRC信令也可以不是。也就是说，可以用于配置第三SRB不一定是由上述SL的第一消息包括的RRC信令配置的，SL RRC有很多种，在SRB上传输的RRC不一定都用于配置SRB。
例如：第一discovery相关消息用默认的SRB进行传输，优先级为最高，RRC信令用默认的SRB或专用SRB进行传输，优先级也为最高，用于SL的PC5 信令消息的SRB通过PC5-RRC进行配置，当专用于PC5信令消息的SRB建立完成后，SL的PC5信令消息在该新建的SRB上进行传输，该SRB优先级稍低。
在另一种实现方式中：在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息可以是指：在上层和MAC层之间通过DRB传输所述第一discovery消息；
所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息，所述SL的第二消息包括：所述SL的数据；或者，所述SL的第一消息包括：所述SL的RRC信令，所述SL的第二消息包括所述SL的数据和所述SL的PC5信令消息。
其中，上述SL的第一消息和第二消息可以参见上面实施方式的说明，此处不作赘述。
该实施方式中，可以实现在上层和MAC层之间通过DRB传输所述第一discovery消息的情况下合理地划分各消息的优先级，使终端能优先进行重要消息的发送或接收，使通信系统的整体表现更好。
可选的，在第一discovery消息通过控制逻辑信道或者数据逻辑信道传输的实施方式中，所述第三优先级的多个消息在DRB上传输；
所述第三优先级的多个消息中至少两项的优先级不同；
当无法同时发送所述第三优先级的多个消息时，根据优先级顺序，优先发送优先级高的消息或优先丢弃所述第三优先级的多个消息中的部分消息。
其中，上述第三优先级的多个消息可以包括：UL的第二消息和SL的第二消息，或者可以包括：UL的第二消息、SL的第二消息和所述第一discovery消息。以SL的第二消息包括PC5信令消息为例，可以给PC5信令消息和/或第一discovery消息分配特殊的LCID或QoS相关参数(例如：QFI/PFI,PQI/VQI)。当终端无法同时发送SL的数据、UL的第二消息、PC5信令消息和第一discovery消息时，可以优先发送优先级高的消息或优先丢弃优先级较低的一、二或三者。
该实施方式中，具体可以参见上面介绍的第一discovery消息透传实施方式的相应说明，此处不作赘述，且可以达到相同的有益效果。
可选的，在第一discovery消息通过控制逻辑信道或者数据逻辑信道传 输的实施方式中，所述UL的第二消息和所述SL的第二消息的优先级不同，其中；
如果所述UL的第二消息的优先级高于第一门限值，则所述UL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息的优先级高于第二门限值，则所述SL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息的优先级不高于所述第二门限值，则所述UL的第二消息优先；
或者，
如果所述SL的第二消息的优先级高于第一门限值，则所述SL的第二消息优先；如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先；如果所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，则所述SL的第二消息优先；
或者，
如果所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，则所述SL的第二消息优先，否则，所述UL的第二消息优先；
或者，
如果所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先，否则，所述SL的第二消息优先；
或者，
在第一情况下，所述SL的第二消息优先，在第二情况下，所述UL的第二消息优先，除所述第一情况和所述第二情况之外的情况，所述SL的第二消息和所述UL的第二消息的优先由所述终端决定，其中，所述第一情况下是：所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，所述第二情况是：如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于所述第二门限值。
该实施方式中，具体可以参见上面介绍的第一discovery消息透传实施 方式的相应说明，此处不作赘述，且可以达到相同的有益效果。
作为一种可选的实施方式，所述第一discovery消息的优先级中，发送所述第一discovery消息的优先级高于接收所述第一discovery消息的优先级；和/或
在所述UL的第二消息的优先级中，发送所述UL的第二消息的优先级高于接收所述UL的第二消息的优先级；和/或
在所述SL的第二消息的优先级中，发送所述SL的第二消息的优先级高于接收所述SL的第二消息的优先级。
该实施方式中，可以进一步对消息的发送和接收的优先级进行区分，从而使得消息的发送和接收更加合理，以提高通信系统的整体性能。
需要说明的是，本公开实施例中，除了传输上述第一discovery消息之外，还可以按照上述定义的优先级传输其他消息，例如：SL的第一消息和第二消息，UL的第一消息和第二消息。
本公开实施例中，传输SL的第一discovery消息；其中，在上层和MAC层之间透传所述第一discovery消息，所述第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全确定；或者在上层和MAC层之间通过逻辑信道传输所述第一discovery消息，所述第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定。由于支持discovery消息，从而提高终端的发现效果。另外，本公开实施例中定义各类消息的优先级，使终端能优先进行重要消息的发送或接收，从而提高终端的通信表现
下面以多个实施例对图2所示实施例提供的消息传输方法进行举例说明，其中，在下面的各实施例中，可以用于Uu口RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输表示上述SL的第一消息，SL PC5口的PC5-RRC相关信令表示上述SL的RRC信令，SL PC5口的数据表示上述SL的数据，Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据表示上述SL的第二消息)，SL PC5口的PC5-S信令表示上述PC5信令消息。
实施例一：
该实施例中，discovery消息没有对应的逻辑信道，通过物理信道进行 传输，PC5-S信令通过DRB传输：
可以定义优先级如下：
1.Uu口RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输；
1.5.SL PC5口的用于public safety的discovery信息的传输或接收(可选的)；
2.SL PC5口的PC5-RRC相关信令；
2.5.SL PC5口的用于public safety的discovery信息的传输或接收(可选的)；
3.SL PC5口的数据、Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据(取决于数据的QoS)，SL PC5口的PC5-S信令
3.5.SL PC5口的用于public safety的discovery信息的传输或接收(可选的)；
4.SL PC5口的用于非public safety的discovery信息。
其中，大原则是：1>2>3>4，而public safety相关的discovery信息，可能高于PC5-RRC，可能在PC5-RRC与PC5数据/Uu其他数据/PC5-S信令之间，也可能低于PC5数据/Uu其他数据/PC5-S信令，也就是说，上述1.5、2.5和3.5可以任取其一。
如果有discovery gap类似的配置，那么额外的，在gap内，public safety与非public safety的discovery消息都高于PC5数据/Uu其他数据/PC5-S信令。
所述非public safety的discovery信息，可能就只是指示非public safety，或commercial。也可以进一步的，具体指示是用于什么的discovery，如用于NCIS，或用于组发现，或用于中继发现等等。
此外，对于优先级3，由于三者全部可以在数据信道上进行传输，因此可以给SL PC5口的PC5-S信令分配特殊的LCID或QoS相关参数(QFI/PFI,PQI/VQI)。当终端无法同时发送三者时，根据优先级顺序，优先传输优先级高的或者优先丢弃优先级较低的一者或两者。
实施例二：
该实施例中，discovery消息没有对应的逻辑信道，通过物理信道进行传输，PC5-S信令通过SRB传输：
可以定义优先级如下：
1.Uu口RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输；
1.5.SL PC5口的用于public safety的discovery信息的传输或接受(可选的)；
2.SL PC5口的PC5-RRC相关信令，SL PC5口的PC5-S信令；
2.5.SL PC5口的用于public safety的discovery信息的传输或接受(可选的)；
3.SL PC5口的数据/Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据(取决于数据的QoS)；
3.5.SL PC5口的用于public safety的discovery信息的传输或接受(可选的)；
4.SL PC5口的用于非public safety的discovery信息。
大原则仍然是1>2>3>4。另外，上述1.5、2.5和3.5可以参见实施例一的相应说明。
对于优先级2，如果SL PC5上只有一个SRB(如默认的SRB)，那么SL PC5口的PC5-RRC相关信令和SL PC5口的PC5-S信令为相同优先级。如果不止一个SRB，可以考虑将SL PC5口的PC5-RRC相关信令和SL PC5口的PC5-S信令放在不同的SRB上，优先级PC5-RRC相关信令>SL PC5口的PC5-S信令。
比如，用于SL PC5口的PC5-S信令的SRB通过PC5-RRC进行配置，当专用于PC5-S信令的SRB建立完成后，SL PC5口的PC5-S信令在该新建的SRB上进行传输。
对于优先级3，SL PC5口的数据和Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据的优先级判定，需要综合考虑两者的QoS情况。
一种可能的方式为：
方案1(两级门限)：
定义两个用于判断SL PC5口的数据和Uu口的数据(这里指排除优先级1中的Uu口数据所确定的其他Uu口数据)的门限值。
如果Uu口的数据优先级高于门限1，则优先Uu口数据，否则(如果Uu口的数据优先级不高于门限1)优先PC5口的数据，或者可以是如果Uu口的数据优先级不高于门限1，且PC5口的数据优先级高于门限2，则优先PC5口的数据；
如果PC5口的数据优先级高于门限1，则优先PC5口的数据，否则优先Uu口的数据，或者可以是，如果PC5口的数据优先级不高于门限1，且Uu口的数据优先级高于门限2，则优先Uu口的数据。
方案2(两级门限)：
如果SL口的数据优先级高于门限1，则优先SL口数据，1否则(如果SL口的数据优先级不高于门限1)优先Uu口的数据，或者可以是如果SL口的数据优先级不高于门限1，且Uu口的数据优先级高于门限2，则优先Uu口的数据：
如果Uu口的数据优先级高于门限1，则优先Uu口的数据，否则优先PC5口的数据，或者可以是如果Uu口的数据优先级不高于门限1，且PC5口的数据优先级高于门限2，则优先PC5口的数据。
方案3(综合考虑)
如果SL优先级足够大且UL优先级足够小，则优先SL传输；否则优先UL传输
方案4(综合考虑)
如果SL优先级足够小且UL优先级足够大，则优先UL传输；否则优先SL传输
方案5(综合考虑)
如果SL优先级足够大且UL优先级足够小，则优先SL传输；
如果SL优先级足够小且UL优先级足够大，则优先UL传输；
其余留给终端实现。
其中，上述优先级可能为网络侧配置或预配置的UL/SL LCH priority， 或PPPP，或PQI/5QI，或PQI/5QI中的priority域。
实施例三：
该实施例中，discovery消息在SRB上传输，PC5-S信令在SRB上传输：
定义如下优先级：
1.Uu口RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输
2.SL PC5口的PC5-RRC相关信令，SL PC5口的PC5-S信令，Discovery相关消息
3.SL PC5口的数据/Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据(取决于数据的QoS)
对于优先级2，如果SL PC5上只有一个SRB(如默认的SRB)，那么SL PC5口的PC5-RRC相关信令和SL PC5口的PC5-S信令，Discovery相关消息为相同优先级。如果不止一个SRB，可以考虑将SL PC5口的PC5-RRC相关信令，SL PC5口的PC5-S信令和Discovery相关消息放在两个或三个不同的SRB上，优先级：PC5-RRC相关信令>＝Discovery相关消息>SL PC5口的PC5-S信令。
比如一种可能的情况是，Discovery相关消息用默认的SRB进行传输，优先级为最高，PC5-RRC相关信令用默认的SRB或专用SRB进行传输，优先级也为最高，用于SL PC5口的PC5-S信令的SRB通过PC5-RRC进行配置，当专用于PC5-S信令的SRB建立完成后，SL PC5口的PC5-S信令在该新建的SRB上进行传输，该SRB优先级稍低。
实施例四：
该实施例中，discovery消息在SRB上传输，PC5-S信令在DRB上传输：
定义如下优先级：
1.Uu口RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输
2.SL PC5口的PC5-RRC相关信令，Discovery相关消息
3.SL PC5口的数据/Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据(取决于数据的QoS)，SL PC5口的PC5-S信令
对于优先级2，可以同实施例三中优先级2的实施方式，除了将三者换为两者。
对于优先级3，分析同实施例一和实施例二中的优先级3的实施方式。
实施例五：
该实施例中，discovery消息在DRB上传输，PC5-S信令在SRB上传输：
定义如下优先级：
1.Uu口RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输
2.SL PC5口的PC5-RRC相关信令，SL PC5口的PC5-S信令
3.SL PC5口的数据/Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据(取决于数据的QoS)，Discovery相关消息
其中，该实施例可以参见实施例四的实施方式，只是把SL PC5口的PC5-S信令和Discovery相关消息换位即可。
实施例五：
该实施例中，discovery消息在DRB上传输，PC5-S信令在DRB上传输：
定义如下优先级：
1.Uu口RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的发送和接收
2.SL PC5口的PC5-RRC相关信令，
3.SL PC5口的数据/Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据(取决于数据的QoS)，SL PC5口的PC5-S信令，Discovery相关消息
其中，该实施例中，优先级3可以参见实施例一和实施例二对于优先级3的实施方式，可以给SL PC5口的PC5-S信令和/或discvoery相关消息分配特殊的LCID或QoS相关参数(QFI/PFI,PQI/VQI)。当UE无法同时发送四者时，根据优先级顺序，优先丢弃优先级较低的一、二或三者。
实施例六：
该实施例中进一步区分不同信令的收与发的优先级：
进一步的，可以对Uu口的数据(包括优先级1始终优先和优先级3中需要和SL口比较的Uu数据)的发送和接收，SL口数据的发送和接收，以及discovery信息的发送和接收，这三类中的一类或多类进一步进行区分并赋予不同的优先级。如以下一些可能的情况：
如，对于实施例二如下定义如下：
1.Uu口RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的发送或接收
1.5.SL PC5口的用于public safety的discovery信息的发送
2.SL PC5口的PC5-RRC相关信令的发送或接收，SL PC5口的PC5-S信令发送或接收
3.SL PC5口的数据/Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据(取决于数据的QoS)的发送
3.5.SL PC5口的用于public safety的discovery信息的接收
3.6.SL PC5口的数据/Uu口非RACH随机接入msg1/3(msgA)的传输和紧急通信(如紧急PDU连接)相关的传输的数据(取决于数据的QoS)的接收
4.SL PC5口的用于非public safety的discovery信息发送或接收
其中，1.5<2或1.5＝2。对于2，还可以进一步细分，见实施例一中对优先级2的实施方式。
对上述实施例一至实施例六定义的优先级的说明可以如下：
一种情况是：单独给相应消息定义优先级，如给不同消息定义不同的LCID(LCID对应不同的优先级)或QoS相关参数(QFI/PFI,PQI/VQI)，最终通过比较消息关联的优先级(如逻辑信道优先级)来实现。此时对于不同优先级的逻辑信道，当终端无法同时传输所有类型的逻辑信道时，优先传输优先级高的，或者优先丢弃低优先级的逻辑信道。
另一种情况是：不一定要单独给相应消息定义优先级，而由于消息在不同的承载/逻辑信道上进行传输，那么该消息的优先级就follow承载/逻辑信道的优先级。(如discovery消息映射到默认SRB，然后在SCCH上传输,而SCCH 的优先级为1，那么discovery消息对应的优先级也就是1)。
本公开实施例可以实现如下：
综合考虑PC5-discovery消息，PC5-S信令，PC5-RRC信令，PC5口数据，Uu口数据等多类UL/SL的消息的优先级比较；
考虑将PC5-discovery消息进一步区分是否为public safety相关，并赋予不同的优先级；
考虑通过两个门限值来判断SL PC5口的数据和Uu口的数据的优先级；
考虑对Uu口的数据的发送和接收，PC5口数据的发送和接收，以及discovery信息的发送和接收，这三类中的一类或多类进一步进行区分并赋予不同的优先级。
本公开实施例中，通过定义优先级使终端能优先进行重要消息的发送或接收，使通信系统的整体表现更好。
请参见图3，图3是本公开实施例提供的一种消息传输方法的流程图，该方法应用于终端，如图3所示，包括以下步骤：
步骤301、依据第一门限值和第二门限值，确定UL消息和SL消息的优先级。
其中，上述第一门限值和第二门限值可以是网络配置的，或者协议约定的，另外，上述第一门限值和第二门限值可以参见图2所示的实施例的相应说明，此处不作赘述。
步骤302、依据所述UL消息和所述SL消息的优先级，对所述UL消息和所述SL消息进行传输处理。
其中，上述对所述UL消息和所述SL消息进行传输处理可以是按照优先级的顺序优先传输优先级高的消息，再传输优先级低的消息，或者可以是传输优先级高的消息，而丢弃优先级低的消息。当然，如果终端可以同时传输多个消息，则可以同时传输上述UL消息和所述SL消息。这里的传输可以是发送或者接收。
另外，上述UL消息和所述SL消息可以是图2所示的实施例中UL的第二消息和SL的第二消息，当然，对此不作限定。例如：UL消息和SL消息可以是在相同的逻辑信道上传输的UL上的消息和SL上的消息。
本实施例中，通过上述步骤可以实现依据上述优先级合理传输上述UL消息和SL消息，以提高终端传输性能，从而解决相关技术中无法区分UL消息和SL消息的优先级导致的终端传输性能比较差的问题。
可选的，所述UL消息和所述SL消息的优先级不同，其中；
如果所述UL消息的优先级高于所述第一门限值，则所述UL消息优先；如果所述UL消息的优先级不高于所述第一门限值，且所述SL消息的优先级高于所述第二门限值，则所述SL消息优先；如果所述UL消息的优先级不高于所述第一门限值，且所述SL消息的优先级不高于所述第二门限值，则所述UL消息优先；
或者，
如果所述SL消息的优先级高于所述第一门限值，则所述SL消息优先；如果所述SL消息的优先级不高于所述第一门限值，且所述UL消息的优先级高于第二门限值，则所述UL消息优先；如果所述SL消息的优先级不高于第一门限值，且所述UL消息的优先级不高于第二门限值，则所述SL消息优先；
或者，
如果所述SL消息的优先级高于所述第一门限值，且所述UL消息的优先级不高于所述第二门限值，则所述SL消息优先，否则，所述UL消息优先；
或者，
如果所述SL消息的优先级不高于所述第一门限值，且所述UL消息的优先级高于所述第二门限值，则所述UL消息优先，否则，所述SL消息优先；
或者，
在第一情况下，所述SL消息优先，在第二情况下，所述UL消息优先，除所述第一情况和所述第二情况之外的情况，所述SL消息和所述UL消息的优先由终端决定，其中，所述第一情况下是：所述SL消息的优先级高于所述第一门限值，且所述UL消息的优先级不高于所述第二门限值，所述第二情况是：如果所述SL消息的优先级低于所述第一门限值，且所述UL消息的优先级高于所述第二门限值。
可选的，所述SL消息包括：所述SL的数据、所述SL的PC5信令消息和discovery消息中的至少一项；
所述UL消息为UL中除随机接入消息、紧急通信消息和第一业务消息之外的消息。
其中，上述UL消息和所述SL消息的优先级可以参见图2所示的实施例中提供的第一门限值和第二门限值的实施方式，此处不作赘述，且可以达到相同的有益效果。
请参见图4，图4是本公开实施例提供的一种终端的结构图，如图6所示，终端400，包括：
传输模块401，用于传输SL的第一discovery消息；
其中，在上层和MAC层之间透传所述第一discovery消息，所述第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全确定；或者
在上层和MAC层之间通过逻辑信道传输所述第一discovery消息，所述第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定。
可选的，在上层和MAC层之间透传所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
上行链路UL的第一消息为第一优先级，SL的第一消息为第二优先级，UL的第二消息和SL的第二消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级；
其中，用于公共安全的discovery消息的优先级高于或者等于所述第二优先级，或者高于所述第三优先级，或者低于所述第三优先级；
用于非公共安全的discovery消息的优先级高于所述第三优先级，或者低于所述第三优先级；
所述用于公共安全的discovery消息的优先级高于所述用于非公共安全的discovery消息的优先级。
可选的，在所述SL配置有发现间隔discovery gap的情况下，在所述discovery gap内用于公共安全的discovery消息和用于非公共安全的discovery消息的优先级高于所述第三优先级。
可选的，在所述第一discovery消息包括指示信息，所述指示信息用于指示所述第一discovery消息为用于公共安全的discovery消息或者为用于 非公共安全或商业的discovery消息。
可选的，所述指示信息还用于指示所述第一discovery消息的发现内容。
可选的，所述UL的第一消息包括：所述UL的随机接入消息、所述UL的紧急通信消息和所述UL的第一业务消息中的至少一项；所述UL的第二消息为：所述UL中除所述UL的第一消息之外的消息；
所述SL的第一消息包括：所述SL的无线资源控制RRC信令，所述SL的第二消息包括：所述SL的数据和所述SL的PC5信令消息中的至少一项；或者，所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息中的至少一项，所述SL的第二消息包括：所述SL的数据。
可选的，在所述SL的第一消息包括所述SL的RRC信令和所述SL的PC5信令消息的情况下：
所述SL的RRC信令和所述SL的PC5信令消息通过同一信令无线承载SRB传输，且所述SL的RRC信令和所述SL的PC5信令消息的优先级相同；或者
所述SL的RRC信令和所述SL的PC5信令消息通过不同的SRB传输，其中，用于所述SL的PC5信令消息的SRB通过SL的RRC信令配置，若用于所述SL的PC5信令消息的SRB建立完成，则所述SL的PC5信令消息在所述建立的SRB上传输，且所述SL的RRC信令的优先级高于所述SL的PC5信令消息的优先级。
可选的，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级为传输所述第一discovery消息的SRB或控制逻辑信道的优先级。
可选的，在所述控制逻辑信道包括不同优先级的SRB的情况下，所述第一discovery消息和SL的消息在所述控制逻辑信道的不同优先级的SRB上传输，且所述第一discovery消息的优先级为传输所述第一discovery消息的SRB的优先级，所述SL的消息包括所述SL的RRC信令和所述SL的PC5信令消息中的至少一项。
可选的，在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息的情况下：
所述第一discovery消息分配有服务质量QoS参数，所述第一discovery 消息被所述终端依据所述QoS参数映射至相应的数据逻辑信道，所述第一discovery消息的优先级为传输所述第一discovery消息的DRB或数据逻辑信道的优先级；或者
所述第一discovery消息分配有逻辑信道标识LCID，所述第一discovery消息的优先级为所述LCID对应的逻辑信道的优先级。
可选的，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
UL的第一消息为第一优先级，SL的第一消息和所述第一discovery消息为第二优先级，UL的第二消息和SL的第二消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级；
或者，
在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
UL的第一消息为第一优先级，SL的第一消息为第二优先级，UL的第二消息、SL的第二消息和所述第一discovery消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级。
可选的，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息是指：在上层和MAC层之间通过SRB传输所述第一discovery消息；
所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息，所述SL的第二消息包括：所述SL的数据；或者，所述SL的第一消息包括：所述SL的RRC信令，所述SL的第二消息包括所述SL的数据和所述SL的PC5信令消息。
可选的，所述第一discovery消息和所述SL的第一消息通过同一SRB传输，且所述第一discovery消息和所述SL的第一消息的优先级相同；或者
所述第一discovery消息和所述SL的第一消息在至少两个SRB上传输，且所述SL的RRC信令的优先级高于或者等于所述第一discovery消息的优先级，所述第一discovery消息的优先级高于或者等于所述SL的PC5信令消息。
可选的，所述第一discovery消息在第一SRB上传输，所述SL的RRC信令在所述第一SRB或者第二SRB上传输，用于所述SL的PC5信令消息的第三 SRB通过SL的RRC信令配置，若所述第三SRB建立完成，则所述SL的PC5信令消息在所述第三SRB上传输；
其中，所述第一SRB和所述第二SRB在所述控制逻辑信道中优先级最高，所述第三SRB的优先级低于所述第一SRB和所述第二SRB的优先级。
可选的，在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息是指：在上层和MAC层之间通过数据无线承载DRB传输所述第一discovery消息；
所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息，所述SL的第二消息包括：所述SL的数据；或者，所述SL的第一消息包括：所述SL的RRC信令，所述SL的第二消息包括所述SL的数据和所述SL的PC5信令消息。
可选的，所述第三优先级的多个消息在DRB上传输；
所述第三优先级的多个消息中至少两项的优先级不同；
当无法同时发送所述第三优先级的多个消息时，根据优先级顺序，优先发送优先级高的消息或优先丢弃所述第三优先级的多个消息中的部分消息。
可选的，所述UL的第二消息和所述SL的第二消息的优先级不同，其中；
如果所述UL的第二消息的优先级高于第一门限值，则所述UL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息的优先级高于第二门限值，则所述SL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息的优先级不高于所述第二门限值，则所述UL的第二消息优先；
或者，
如果所述SL的第二消息的优先级高于第一门限值，则所述SL的第二消息优先；如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先；如果所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，则所述SL的第二消息优先；
或者，
如果所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消 息的优先级不高于第二门限值，则所述SL的第二消息优先，否则，所述UL的第二消息优先；
或者，
如果所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先，否则，所述SL的第二消息优先；
或者，
在第一情况下，所述SL的第二消息优先，在第二情况下，所述UL的第二消息优先，除所述第一情况和所述第二情况之外的情况，所述SL的第二消息和所述UL的第二消息的优先由所述终端决定，其中，所述第一情况下是：所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，所述第二情况是：如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于所述第二门限值。
可选的，所述第一discovery消息的优先级中，发送所述第一discovery消息的优先级高于接收所述第一discovery消息的优先级；和/或
在所述UL的第二消息的优先级中，发送所述UL的第二消息的优先级高于接收所述UL的第二消息的优先级；和/或
在所述SL的第二消息的优先级中，发送所述SL的第二消息的优先级高于接收所述SL的第二消息的优先级。
本公开实施例提供的终端能够实现图2的方法实施例中终端实现的各个过程，为避免重复，这里不再赘述，且可以提高终端的发现效果。
请参见图5，图5是本公开实施例提供的另一种终端的结构图，如图5所示，终端500包括：
确定模块501，用于依据第一门限值和第二门限值，确定UL消息和SL消息的优先级；
处理模块502，用于依据所述UL消息和所述SL消息的优先级，对所述UL消息和所述SL消息进行传输处理。
可选的，所述UL消息和所述SL消息的优先级不同，其中；
如果所述UL消息的优先级高于所述第一门限值，则所述UL消息优先； 如果所述UL消息的优先级不高于所述第一门限值，且所述SL消息的优先级高于所述第二门限值，则所述SL消息优先；如果所述UL消息的优先级不高于所述第一门限值，且所述SL消息的优先级不高于所述第二门限值，则所述UL消息优先；
或者，
如果所述SL消息的优先级高于所述第一门限值，则所述SL消息优先；如果所述SL消息的优先级不高于所述第一门限值，且所述UL消息的优先级高于第二门限值，则所述UL消息优先；如果所述SL消息的优先级不高于第一门限值，且所述UL消息的优先级不高于第二门限值，则所述SL消息优先；
或者，
如果所述SL消息的优先级高于所述第一门限值，且所述UL消息的优先级不高于所述第二门限值，则所述SL消息优先，否则，所述UL消息优先；
或者，
如果所述SL消息的优先级不高于所述第一门限值，且所述UL消息的优先级高于所述第二门限值，则所述UL消息优先，否则，所述SL消息优先；
或者，
在第一情况下，所述SL消息优先，在第二情况下，所述UL消息优先，除所述第一情况和所述第二情况之外的情况，所述SL消息和所述UL消息的优先由终端决定，其中，所述第一情况下是：所述SL消息的优先级高于所述第一门限值，且所述UL消息的优先级不高于所述第二门限值，所述第二情况是：如果所述SL消息的优先级低于所述第一门限值，且所述UL消息的优先级高于所述第二门限值。
可选的，所述SL消息包括：所述SL的数据、所述SL的PC5信令消息和discovery消息中的至少一项；
所述UL消息为UL中除随机接入消息、紧急通信消息和第一业务消息之外的消息。
本公开实施例提供的终端能够实现图2的方法实施例中终端实现的各个过程，为避免重复，这里不再赘述，且可以提高终端的传输性能。
图6为实现本公开各个实施例的一种终端的硬件结构示意图，
该终端600包括但不限于：射频单元601、网络模块602、音频输出单元603、输入单元604、传感器605、显示单元606、用户输入单元607、接口单元608、存储器609、处理器610、以及电源611等部件。本领域技术人员可以理解，图6中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。在本公开实施例中，终端包括但不限于手机、平板电脑、笔记本电脑、掌上电脑、车载终端、机器人、可穿戴设备、以及计步器等。
在一个实施例中：
射频单元601，用于传输SL的第一discovery消息；
其中，在上层和MAC层之间透传所述第一discovery消息，所述第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全确定；或者
在上层和MAC层之间通过逻辑信道传输所述第一discovery消息，所述第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定。
可选的，在上层和MAC层之间透传所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
上行链路UL的第一消息为第一优先级，SL的第一消息为第二优先级，UL的第二消息和SL的第二消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级；
其中，用于公共安全的discovery消息的优先级高于或者等于所述第二优先级，或者高于所述第三优先级，或者低于所述第三优先级；
用于非公共安全的discovery消息的优先级高于所述第三优先级，或者低于所述第三优先级；
所述用于公共安全的discovery消息的优先级高于所述用于非公共安全的discovery消息的优先级。
可选的，在所述SL配置有发现间隔discovery gap的情况下，在所述discovery gap内用于公共安全的discovery消息和用于非公共安全的discovery消息的优先级高于所述第三优先级。
可选的，在所述第一discovery消息包括指示信息，所述指示信息用于 指示所述第一discovery消息为用于公共安全的discovery消息或者为用于非公共安全或商业的discovery消息。
可选的，所述指示信息还用于指示所述第一discovery消息的发现内容。
可选的，所述UL的第一消息包括：所述UL的随机接入消息、所述UL的紧急通信消息和所述UL的第一业务消息中的至少一项；所述UL的第二消息为：所述UL中除所述UL的第一消息之外的消息；
所述SL的第一消息包括：所述SL的无线资源控制RRC信令，所述SL的第二消息包括：所述SL的数据和所述SL的PC5信令消息中的至少一项；或者，所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息中的至少一项，所述SL的第二消息包括：所述SL的数据。
可选的，在所述SL的第一消息包括所述SL的RRC信令和所述SL的PC5信令消息的情况下：
所述SL的RRC信令和所述SL的PC5信令消息通过同一信令无线承载SRB传输，且所述SL的RRC信令和所述SL的PC5信令消息的优先级相同；或者
所述SL的RRC信令和所述SL的PC5信令消息通过不同的SRB传输，其中，用于所述SL的PC5信令消息的SRB通过SL的RRC信令配置，若用于所述SL的PC5信令消息的SRB建立完成，则所述SL的PC5信令消息在所述建立的SRB上传输，且所述SL的RRC信令的优先级高于所述SL的PC5信令消息的优先级。
可选的，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级为传输所述第一discovery消息的SRB或控制逻辑信道的优先级。
可选的，在所述控制逻辑信道包括不同优先级的SRB的情况下，所述第一discovery消息和SL的消息在所述控制逻辑信道的不同优先级的SRB上传输，且所述第一discovery消息的优先级为传输所述第一discovery消息的SRB的优先级，所述SL的消息包括所述SL的RRC信令和所述SL的PC5信令消息中的至少一项。
可选的，在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息的情况下：
所述第一discovery消息分配有服务质量QoS参数，所述第一discovery消息被所述终端依据所述QoS参数映射至相应的数据逻辑信道，所述第一discovery消息的优先级为传输所述第一discovery消息的DRB或数据逻辑信道的优先级；或者
所述第一discovery消息分配有逻辑信道标识LCID，所述第一discovery消息的优先级为所述LCID对应的逻辑信道的优先级。
可选的，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
UL的第一消息为第一优先级，SL的第一消息和所述第一discovery消息为第二优先级，UL的第二消息和SL的第二消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级；
或者，
在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
UL的第一消息为第一优先级，SL的第一消息为第二优先级，UL的第二消息、SL的第二消息和所述第一discovery消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级。
可选的，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息是指：在上层和MAC层之间通过SRB传输所述第一discovery消息；
所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息，所述SL的第二消息包括：所述SL的数据；或者，所述SL的第一消息包括：所述SL的RRC信令，所述SL的第二消息包括所述SL的数据和所述SL的PC5信令消息。
可选的，所述第一discovery消息和所述SL的第一消息通过同一SRB传输，且所述第一discovery消息和所述SL的第一消息的优先级相同；或者
所述第一discovery消息和所述SL的第一消息在至少两个SRB上传输，且所述SL的RRC信令的优先级高于或者等于所述第一discovery消息的优先级，所述第一discovery消息的优先级高于或者等于所述SL的PC5信令消息。
可选的，所述第一discovery消息在第一SRB上传输，所述SL的RRC信 令在所述第一SRB或者第二SRB上传输，用于所述SL的PC5信令消息的第三SRB通过SL的RRC信令配置，若所述第三SRB建立完成，则所述SL的PC5信令消息在所述第三SRB上传输；
其中，所述第一SRB和所述第二SRB在所述控制逻辑信道中优先级最高，所述第三SRB的优先级低于所述第一SRB和所述第二SRB的优先级。
可选的，在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息是指：在上层和MAC层之间通过数据无线承载DRB传输所述第一discovery消息；
所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息，所述SL的第二消息包括：所述SL的数据；或者，所述SL的第一消息包括：所述SL的RRC信令，所述SL的第二消息包括所述SL的数据和所述SL的PC5信令消息。
可选的，所述第三优先级的多个消息在DRB上传输；
所述第三优先级的多个消息中至少两项的优先级不同；
当无法同时发送所述第三优先级的多个消息时，根据优先级顺序，优先发送优先级高的消息或优先丢弃所述第三优先级的多个消息中的部分消息。
可选的，所述UL的第二消息和所述SL的第二消息的优先级不同，其中；
如果所述UL的第二消息的优先级高于第一门限值，则所述UL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息的优先级高于第二门限值，则所述SL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息的优先级不高于所述第二门限值，则所述UL的第二消息优先；
或者，
如果所述SL的第二消息的优先级高于第一门限值，则所述SL的第二消息优先；如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先；如果所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，则所述SL的第二消息优先；
或者，
如果所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，则所述SL的第二消息优先，否则，所述UL的第二消息优先；
或者，
如果所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先，否则，所述SL的第二消息优先；
或者，
在第一情况下，所述SL的第二消息优先，在第二情况下，所述UL的第二消息优先，除所述第一情况和所述第二情况之外的情况，所述SL的第二消息和所述UL的第二消息的优先由所述终端决定，其中，所述第一情况下是：所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，所述第二情况是：如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于所述第二门限值。
可选的，所述第一discovery消息的优先级中，发送所述第一discovery消息的优先级高于接收所述第一discovery消息的优先级；和/或
在所述UL的第二消息的优先级中，发送所述UL的第二消息的优先级高于接收所述UL的第二消息的优先级；和/或
在所述SL的第二消息的优先级中，发送所述SL的第二消息的优先级高于接收所述SL的第二消息的优先级。
上述终端提高终端的发现效果。
在另一个实施例中：
处理器610，用于依据第一门限值和第二门限值，确定UL消息和SL消息的优先级；
射频单元601，用于依据所述UL消息和所述SL消息的优先级，对所述UL消息和所述SL消息进行传输处理。
可选的，所述UL消息和所述SL消息的优先级不同，其中；
如果所述UL消息的优先级高于所述第一门限值，则所述UL消息优先；如果所述UL消息的优先级不高于所述第一门限值，且所述SL消息的优先级 高于所述第二门限值，则所述SL消息优先；如果所述UL消息的优先级不高于所述第一门限值，且所述SL消息的优先级不高于所述第二门限值，则所述UL消息优先；
或者，
如果所述SL消息的优先级高于所述第一门限值，则所述SL消息优先；如果所述SL消息的优先级不高于所述第一门限值，且所述UL消息的优先级高于第二门限值，则所述UL消息优先；如果所述SL消息的优先级不高于第一门限值，且所述UL消息的优先级不高于第二门限值，则所述SL消息优先；
或者，
如果所述SL消息的优先级高于所述第一门限值，且所述UL消息的优先级不高于所述第二门限值，则所述SL消息优先，否则，所述UL消息优先；
或者，
如果所述SL消息的优先级不高于所述第一门限值，且所述UL消息的优先级高于所述第二门限值，则所述UL消息优先，否则，所述SL消息优先；
或者，
在第一情况下，所述SL消息优先，在第二情况下，所述UL消息优先，除所述第一情况和所述第二情况之外的情况，所述SL消息和所述UL消息的优先由终端决定，其中，所述第一情况下是：所述SL消息的优先级高于所述第一门限值，且所述UL消息的优先级不高于所述第二门限值，所述第二情况是：如果所述SL消息的优先级低于所述第一门限值，且所述UL消息的优先级高于所述第二门限值。
可选的，所述SL消息包括：所述SL的数据、所述SL的PC5信令消息和discovery消息中的至少一项；
所述UL消息为UL中除随机接入消息、紧急通信消息和第一业务消息之外的消息。
上述终端提高终端的传输性能。
应理解的是，本公开实施例中，射频单元601可用于收发信息或通话过程中，信号的接收和发送，具体的，将来自基站的下行数据接收后，给处理器610处理；另外，将上行的数据发送给基站。通常，射频单元601包括但 不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，射频单元601还可以通过无线通信系统与网络和其他设备通信。
终端通过网络模块602为用户提供了无线的宽带互联网访问，如帮助用户收发电子邮件、浏览网页和访问流式媒体等。
音频输出单元603可以将射频单元601或网络模块602接收的或者在存储器609中存储的音频数据转换成音频信号并且输出为声音。而且，音频输出单元603还可以提供与终端600执行的特定功能相关的音频输出(例如，呼叫信号接收声音、消息接收声音等等)。音频输出单元603包括扬声器、蜂鸣器以及受话器等。
输入单元604用于接收音频或视频信号。输入单元604可以包括图形处理器(Graphics Processing Unit，GPU)6041和麦克风6042，图形处理器6041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。处理后的图像帧可以显示在显示单元606上。经图形处理器6041处理后的图像帧可以存储在存储器609(或其它存储介质)中或者经由射频单元601或网络模块602进行发送。麦克风6042可以接收声音，并且能够将这样的声音处理为音频数据。处理后的音频数据可以在电话通话模式的情况下转换为可经由射频单元601发送到移动通信基站的格式输出。
终端600还包括至少一种传感器605，比如光传感器、运动传感器以及其他传感器。具体地，光传感器包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板6061的亮度，接近传感器可在终端600移动到耳边时，关闭显示面板6061和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别终端姿态(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；传感器605还可以包括指纹传感器、压力传感器、虹膜传感器、分子传感器、陀螺仪、气压计、湿度计、温度计、红外线传感器等，在此不再赘述。
显示单元606用于显示由用户输入的信息或提供给用户的信息。显示单元606可包括显示面板6061，可以采用液晶显示器(Liquid Crystal Display， LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板6061。
用户输入单元607可用于接收输入的数字或字符信息，以及产生与终端的用户设置以及功能控制有关的键信号输入。具体地，用户输入单元607包括触控面板6071以及其他输入设备6072。触控面板6071，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板6071上或在触控面板6071附近的操作)。触控面板6071可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器610，接收处理器610发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板6071。除了触控面板6071，用户输入单元607还可以包括其他输入设备6072。具体地，其他输入设备6072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
进一步的，触控面板6071可覆盖在显示面板6061上，当触控面板6071检测到在其上或附近的触摸操作后，传送给处理器610以确定触摸事件的类型，随后处理器610根据触摸事件的类型在显示面板6061上提供相应的视觉输出。虽然在图6中，触控面板6071与显示面板6061是作为两个独立的部件来实现终端的输入和输出功能，但是在某些实施例中，可以将触控面板6071与显示面板6061集成而实现终端的输入和输出功能，具体此处不做限定。
接口单元608为外部装置与终端600连接的接口。例如，外部装置可以包括有线或无线头戴式耳机端口、外部电源(或电池充电器)端口、有线或无线数据端口、存储卡端口、用于连接具有识别模块的装置的端口、音频输入/输出(I/O)端口、视频I/O端口、耳机端口等等。接口单元608可以用于接收来自外部装置的输入(例如，数据信息、电力等等)并且将接收到的输入传输到终端600内的一个或多个元件或者可以用于在终端600和外部装置之间传输数据。
存储器609可用于存储软件程序以及各种数据。存储器609可主要包括 存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器609可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
处理器610是终端的控制中心，利用各种接口和线路连接整个终端的各个部分，通过运行或执行存储在存储器609内的软件程序和/或模块，以及调用存储在存储器609内的数据，执行终端的各种功能和处理数据，从而对终端进行整体监控。处理器610可包括一个或多个处理单元；可选的，处理器610可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器610中。
终端600还可以包括给各个部件供电的电源611(比如电池)，可选的，电源611可以通过电源管理系统与处理器610逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
另外，终端600包括一些未示出的功能模块，在此不再赘述。
可选的，本公开实施例还提供一种终端，包括处理器610，存储器609，存储在存储器609上并可在所述处理器610上运行的计算机程序，该计算机程序被处理器610执行时实现图2或者图3所示的实施例提供的消息传输消息方法的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本公开实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现实现图2或者图3所示的实施例提供的消息传输消息方法，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还 包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本公开各个实施例所述的方法。
上面结合附图对本公开的实施例进行了描述，但是本公开并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本公开的启示下，在不脱离本公开宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本公开的保护之内。

Claims (25)

  1. 一种消息传输方法，应用于终端，包括：
    传输副链路(SL)的第一发现(discovery)消息；
    其中，在上层和媒体接入控制MAC层之间透传所述第一discovery消息，所述第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全确定；或者
    在上层和MAC层之间通过逻辑信道传输所述第一discovery消息，所述第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定。
  2. 如权利要求1所述的方法，其中，在上层和MAC层之间透传所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
    上行链路(UL)的第一消息为第一优先级，SL的第一消息为第二优先级，UL的第二消息和SL的第二消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级；
    其中，用于公共安全的discovery消息的优先级高于或者等于所述第二优先级，或者高于所述第三优先级，或者低于所述第三优先级；
    用于非公共安全的discovery消息的优先级高于所述第三优先级，或者低于所述第三优先级；
    所述用于公共安全的discovery消息的优先级高于所述用于非公共安全的discovery消息的优先级。
  3. 如权利要求2所述的方法，其中，在所述SL配置有发现间隔(discovery gap)的情况下，在所述discovery gap内用于公共安全的discovery消息和用于非公共安全的discovery消息的优先级高于所述第三优先级。
  4. 如权利要求2所述的方法，其中，在所述第一discovery消息包括指示信息，所述指示信息用于指示所述第一discovery消息为用于公共安全的discovery消息或者为用于非公共安全或商业的discovery消息。
  5. 如权利要求4所述的方法，其中，所述指示信息还用于指示所述第一discovery消息的发现内容。
  6. 如权利要求2所述的方法，其中，所述UL的第一消息包括：所述 UL的随机接入消息、所述UL的紧急通信消息和所述UL的第一业务消息中的至少一项；所述UL的第二消息为：所述UL中除所述UL的第一消息之外的消息；
    所述SL的第一消息包括：所述SL的无线资源控制RRC信令，所述SL的第二消息包括：所述SL的数据和所述SL的PC5信令消息中的至少一项；或者，所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息中的至少一项，所述SL的第二消息包括：所述SL的数据。
  7. 如权利要求6所述的方法，其中，在所述SL的第一消息包括所述SL的RRC信令和所述SL的PC5信令消息的情况下：
    所述SL的RRC信令和所述SL的PC5信令消息通过同一信令无线承载SRB传输，且所述SL的RRC信令和所述SL的PC5信令消息的优先级相同；或者
    所述SL的RRC信令和所述SL的PC5信令消息通过不同的SRB传输，其中，用于所述SL的PC5信令消息的SRB通过SL的RRC信令配置，若用于所述SL的PC5信令消息的SRB建立完成，则所述SL的PC5信令消息在所述建立的SRB上传输，且所述SL的RRC信令的优先级高于所述SL的PC5信令消息的优先级。
  8. 如权利要求1所述的方法，其中，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级为传输所述第一discovery消息的SRB或控制逻辑信道的优先级。
  9. 如权利要求8所述的方法，其中，在所述控制逻辑信道包括不同优先级的SRB的情况下，所述第一discovery消息和SL的消息在所述控制逻辑信道的不同优先级的SRB上传输，且所述第一discovery消息的优先级为传输所述第一discovery消息的SRB的优先级，所述SL的消息包括所述SL的RRC信令和所述SL的PC5信令消息中的至少一项。
  10. 如权利要求1所述的方法，其中，在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息的情况下：
    所述第一discovery消息分配有服务质量QoS参数，所述第一discovery消息被所述终端依据所述QoS参数映射至相应的数据逻辑信道，所述第一 discovery消息的优先级为传输所述第一discovery消息的DRB或数据逻辑信道的优先级；或者
    所述第一discovery消息分配有逻辑信道标识LCID，所述第一discovery消息的优先级为所述LCID对应的逻辑信道的优先级。
  11. 如权利要求1所述的方法，其中，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
    UL的第一消息为第一优先级，SL的第一消息和所述第一discovery消息为第二优先级，UL的第二消息和SL的第二消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级；
    或者，
    在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息的情况下，所述第一discovery消息的优先级根据如下确定：
    UL的第一消息为第一优先级，SL的第一消息为第二优先级，UL的第二消息、SL的第二消息和所述第一discovery消息为第三优先级，第一优先级高于或等于第二优先级，第二优先级高于第三优先级。
  12. 如权利要求11所述的方法，其中，在上层和MAC层之间通过控制逻辑信道传输所述第一discovery消息是指：在上层和MAC层之间通过SRB传输所述第一discovery消息；
    所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息，所述SL的第二消息包括：所述SL的数据；或者，所述SL的第一消息包括：所述SL的RRC信令，所述SL的第二消息包括所述SL的数据和所述SL的PC5信令消息。
  13. 如权利要求12所述的方法，其中，所述第一discovery消息和所述SL的第一消息通过同一SRB传输，且所述第一discovery消息和所述SL的第一消息的优先级相同；或者
    所述第一discovery消息和所述SL的第一消息在至少两个SRB上传输，且所述SL的RRC信令的优先级高于或者等于所述第一discovery消息的优先级，所述第一discovery消息的优先级高于或者等于所述SL的PC5信令消息。
  14. 如权利要求13所述的方法，其中，所述第一discovery消息在第一SRB上传输，所述SL的RRC信令在所述第一SRB或者第二SRB上传输，用于所述SL的PC5信令消息的第三SRB通过SL的RRC信令配置，若所述第三SRB建立完成，则所述SL的PC5信令消息在所述第三SRB上传输；
    其中，所述第一SRB和所述第二SRB在所述控制逻辑信道中优先级最高，所述第三SRB的优先级低于所述第一SRB和所述第二SRB的优先级。
  15. 如权利要求11所述的方法，其中，在上层和MAC层之间通过数据逻辑信道传输所述第一discovery消息是指：在上层和MAC层之间通过数据无线承载DRB传输所述第一discovery消息；
    所述SL的第一消息包括：所述SL的RRC信令和所述SL的PC5信令消息，所述SL的第二消息包括：所述SL的数据；或者，所述SL的第一消息包括：所述SL的RRC信令，所述SL的第二消息包括所述SL的数据和所述SL的PC5信令消息。
  16. 如权利要求6或11所述的方法，其中，所述第三优先级的多个消息在DRB上传输；
    所述第三优先级的多个消息中至少两项的优先级不同；
    当无法同时发送所述第三优先级的多个消息时，根据优先级顺序，优先发送优先级高的消息或优先丢弃所述第三优先级的多个消息中的部分消息。
  17. 如权利要求6或11所述的方法，其中，所述UL的第二消息和所述SL的第二消息的优先级不同，其中；
    如果所述UL的第二消息的优先级高于第一门限值，则所述UL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息的优先级高于第二门限值，则所述SL的第二消息优先；如果所述UL的第二消息的优先级不高于所述第一门限值，且所述SL的第二消息的优先级不高于所述第二门限值，则所述UL的第二消息优先；
    或者，
    如果所述SL的第二消息的优先级高于第一门限值，则所述SL的第二消息优先；如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先；如果 所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，则所述SL的第二消息优先；
    或者，
    如果所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，则所述SL的第二消息优先，否则，所述UL的第二消息优先；
    或者，
    如果所述SL的第二消息的优先级不高于第一门限值，且所述UL的第二消息的优先级高于第二门限值，则所述UL的第二消息优先，否则，所述SL的第二消息优先；
    或者，
    在第一情况下，所述SL的第二消息优先，在第二情况下，所述UL的第二消息优先，除所述第一情况和所述第二情况之外的情况，所述SL的第二消息和所述UL的第二消息的优先由所述终端决定，其中，所述第一情况下是：所述SL的第二消息的优先级高于第一门限值，且所述UL的第二消息的优先级不高于第二门限值，所述第二情况是：如果所述SL的第二消息的优先级不高于所述第一门限值，且所述UL的第二消息的优先级高于所述第二门限值。
  18. 如权利要求2或11所述的方法，其中，所述第一discovery消息的优先级中，发送所述第一discovery消息的优先级高于接收所述第一discovery消息的优先级；和/或
    在所述UL的第二消息的优先级中，发送所述UL的第二消息的优先级高于接收所述UL的第二消息的优先级；和/或
    在所述SL的第二消息的优先级中，发送所述SL的第二消息的优先级高于接收所述SL的第二消息的优先级。
  19. 一种消息传输方法，包括：
    依据第一门限值和第二门限值，确定UL消息和SL消息的优先级；
    依据所述UL消息和所述SL消息的优先级，对所述UL消息和所述SL消息进行传输处理。
  20. 如权利要求19所述的方法，其中，所述UL消息和所述SL消息的 优先级不同，其中；
    如果所述UL消息的优先级高于所述第一门限值，则所述UL消息优先；如果所述UL消息的优先级不高于所述第一门限值，且所述SL消息的优先级高于所述第二门限值，则所述SL消息优先；如果所述UL消息的优先级不高于所述第一门限值，且所述SL消息的优先级不高于所述第二门限值，则所述UL消息优先；
    或者，
    如果所述SL消息的优先级高于所述第一门限值，则所述SL消息优先；如果所述SL消息的优先级不高于所述第一门限值，且所述UL消息的优先级高于第二门限值，则所述UL消息优先；如果所述SL消息的优先级不高于第一门限值，且所述UL消息的优先级不高于第二门限值，则所述SL消息优先；
    或者，
    如果所述SL消息的优先级高于所述第一门限值，且所述UL消息的优先级不高于所述第二门限值，则所述SL消息优先，否则，所述UL消息优先；
    或者，
    如果所述SL消息的优先级不高于所述第一门限值，且所述UL消息的优先级高于所述第二门限值，则所述UL消息优先，否则，所述SL消息优先；
    或者，
    在第一情况下，所述SL消息优先，在第二情况下，所述UL消息优先，除所述第一情况和所述第二情况之外的情况，所述SL消息和所述UL消息的优先由终端决定，其中，所述第一情况下是：所述SL消息的优先级高于所述第一门限值，且所述UL消息的优先级不高于所述第二门限值，所述第二情况是：如果所述SL消息的优先级低于所述第一门限值，且所述UL消息的优先级高于所述第二门限值。
  21. 如权利要求19所述的方法，其中，所述SL消息包括：所述SL的数据、所述SL的PC5信令消息和discovery消息中的至少一项；
    所述UL消息为UL中除随机接入消息、紧急通信消息和第一业务消息之外的消息。
  22. 一种终端，包括：
    传输模块，用于传输SL的第一discovery消息；
    其中，在上层和MAC层之间透传所述第一discovery消息，所述第一discovery消息的优先级依据所述第一discovery消息是否用于公共安全确定；或者
    在上层和MAC层之间通过逻辑信道传输所述第一discovery消息，所述第一discovery消息的优先级依据所述逻辑信道和/或对应的承载确定。
  23. 一种终端，包括：
    确定模块，用于依据第一门限值和第二门限值，确定UL消息和SL消息的优先级；
    处理模块，用于依据所述UL消息和所述SL消息的优先级，对所述UL消息和所述SL消息进行传输处理。
  24. 一种终端，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如权利要求1至18中任一项所述的消息传输方法中的步骤，或者，所述程序被所述处理器执行时实现如权利要求19至21中任一项所述的消息传输方法中的步骤。
  25. 一种计算机可读存储介质，其中，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至18中任一项所述的消息传输方法中的步骤，或者所述计算机程序被处理器执行时实现如权利要求19至21中任一项所述的消息传输方法中的步骤。
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