WO2019154331A1 - 一种连接建立方法及终端 - Google Patents

一种连接建立方法及终端 Download PDF

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Publication number
WO2019154331A1
WO2019154331A1 PCT/CN2019/074473 CN2019074473W WO2019154331A1 WO 2019154331 A1 WO2019154331 A1 WO 2019154331A1 CN 2019074473 W CN2019074473 W CN 2019074473W WO 2019154331 A1 WO2019154331 A1 WO 2019154331A1
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WO
WIPO (PCT)
Prior art keywords
terminal
communication
request message
connection establishment
connection
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PCT/CN2019/074473
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English (en)
French (fr)
Inventor
冯媛
彭莹
赵锐
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电信科学技术研究院有限公司
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Publication of WO2019154331A1 publication Critical patent/WO2019154331A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • 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]

Definitions

  • the present application relates to the field of wireless communications technologies, and in particular, to a connection establishment method and a terminal.
  • V2X vehicle to everything
  • a PC5 interface also referred to as a through link, described as Sidelink
  • UE User Equipment
  • the main purpose is a service packet with a packet size of 50-1200 bytes, and the required service packet has a reliability greater than 95% within the specified coverage.
  • the purpose of the application is to provide a connection establishment method and a terminal to solve the technical problem that unicast or multicast communication cannot be implemented between terminals in a vehicle network wireless system in the prior art.
  • a connection establishment method includes:
  • connection establishment request message includes a communication object identifier and a service type, and the communication object identifier is used to indicate a communication group to be joined by the second terminal or the second terminal ;
  • the first terminal receives the acknowledgment response sent by the second terminal, it confirms that the connection with the communication object is established.
  • the process of establishing a connection by the first terminal may include determining a communication object and broadcasting a connection establishment request message, and if receiving the confirmation response sent by the second terminal, determining to successfully establish a connection with the communication object.
  • the communication object identifier in the connection establishment request message may indicate at least one second terminal. Therefore, if the first terminal needs to initiate unicast, the terminal identifier may indicate a terminal, and if the first terminal needs to initiate multicast, the communication may be performed.
  • the object identifier indicates the communication group to be joined by the terminal, thereby solving the technical problem that the unicast or multicast cannot be established between the terminals in the LTE V2X system in the prior art.
  • the first terminal broadcasts a connection establishment request message, including:
  • the first terminal broadcasts the connection establishment request message by using a control channel, or a time-frequency resource currently available in the traffic channel and satisfying a delay requirement.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is received
  • the first terminal receives the acknowledgement response on the response time-frequency resource.
  • the method before the receiving, by the first terminal, the acknowledgement response sent by the second terminal, the method further includes:
  • the first terminal determines a time-frequency resource for the subsequent service information interaction according to the communication capability of the second terminal, and sends the time-frequency resource to the second terminal.
  • connection establishment request message further includes an optional time-frequency resource for subsequent service information interaction.
  • connection establishment request message further includes a communication capability of the first terminal, where the communication capability of the first terminal is used to confirm time-frequency resources used by the second terminal to interact with subsequent service information.
  • the communication object identifier is an identifier of a second terminal
  • the first terminal receives the acknowledgment response sent by the second terminal, determining to establish a unicast connection with the second terminal.
  • connection establishment request message further includes an interaction identifier that is allocated by the first terminal to the second terminal, and is used to identify the second terminal when the subsequent service information is exchanged.
  • the method further includes:
  • the first terminal If the first terminal does not receive the acknowledgment response or the connection establishment information request message sent by the second terminal within the set time period, the first terminal retransmits or continuously retransmits the connection establishment according to the first set period. Request message.
  • the communication object identifier is a group identifier of a communication group with the first terminal as a group header, and the second terminal dynamically joins the communication group;
  • the second terminal establishes a connection with the communication group.
  • the method further includes:
  • the other terminal If the first terminal receives an acknowledgment response sent by another terminal, the other terminal establishes a connection with the communication group.
  • the method further includes:
  • the first terminal determines that the group capacity of the communication group does not reach the set upper limit value, the first terminal broadcasts the connection establishment request message according to the second setting period.
  • the method further includes:
  • the first terminal allocates an intra-group identifier to a terminal that establishes a connection with the communication group.
  • another method for establishing a connection in the embodiment of the present application includes:
  • the second terminal receives the connection establishment request message sent by the first terminal, where the connection establishment request message includes the communication object identifier and the service type determined by the first terminal;
  • the second terminal determines that the communication object identifier indicates the second terminal and supports the service type, sending a confirmation response to the first terminal.
  • the determining, by the second terminal, that the communication object identifier indicates that the second terminal includes:
  • the second terminal determines that the communication object identifier is an identifier of the second terminal, or the communication object identifier is a group identifier of a communication group that is interested in the second terminal.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is received
  • the second terminal sends the acknowledgement response on the response time-frequency resource.
  • connection establishment request message further includes an optional time-frequency resource of the subsequent service information interaction or the communication capability of the first terminal, where the communication capability of the first terminal is used to confirm with the first terminal. Time-frequency resources used for subsequent business information interaction.
  • the method before the sending, by the second terminal, the acknowledgement response to the first terminal, the method further includes:
  • the second terminal sends a connection confirmation response message to the first terminal, where the connection confirmation response message includes the communication capability of the second terminal;
  • the second terminal receives the time-frequency resource information sent by the first terminal, and performs service information interaction with the first terminal on the time-frequency resource indicated by the time-frequency resource information, where the time-frequency resource The information is determined by the first terminal according to the communication capability of the second terminal.
  • a terminal of the embodiment of the present application includes:
  • a processing module configured to determine a communication object
  • a transceiver module configured to: after the processing module determines the communication object, broadcast a connection establishment request message; the connection establishment request message includes a communication object identifier and a service type, where the communication object identifier is used to indicate the at least one second terminal; And if the acknowledgment response sent by the second terminal is received, determining to establish a connection with the communication object.
  • the transceiver module is specifically configured to:
  • connection establishment request message is broadcast using a control channel, or a time-frequency resource currently available in the traffic channel and satisfying the delay requirement.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is received
  • the transceiver module is specifically configured to:
  • the transceiver module is further configured to:
  • connection confirmation response message includes a communication capability of the second terminal
  • the processing module is further configured to determine, according to the communication capability of the second terminal, a time-frequency resource for the subsequent service information interaction, and send the time-frequency resource to the second terminal by using the transceiver module.
  • connection establishment request message further includes an optional time-frequency resource for subsequent service information interaction.
  • connection establishment request message further includes a communication capability of the first terminal, where the communication capability of the first terminal is used to confirm time-frequency resources used by the second terminal to interact with subsequent service information.
  • the communication object identifier is an identifier of a second terminal
  • the transceiver module is specifically configured to:
  • connection establishment request message further includes an interaction identifier that is allocated by the first terminal to the second terminal, and is used to identify the second terminal when the subsequent service information is exchanged.
  • the transceiver module is further configured to:
  • connection establishment request message is retransmitted or retransmitted multiple times in accordance with the first set period.
  • the communication object identifier is a group identifier of a communication group with the first terminal as a group header, and the second terminal dynamically joins the communication group;
  • the transceiver module is specifically configured to:
  • the transceiver module is further configured to:
  • the other terminal If an acknowledgment response sent by another terminal is received, the other terminal is established to connect with the communication group.
  • the transceiver module is further configured to:
  • connection establishment request message is broadcasted according to the second setting period.
  • processing module is further configured to:
  • the intra-group identifier is allocated to the terminal that establishes a connection with the communication group.
  • a terminal of the embodiment of the present application includes:
  • a transceiver module configured to receive a connection establishment request message sent by the first terminal, where the connection establishment request message includes a communication object identifier and a service type determined by the first terminal;
  • a processing module configured to send, by the transceiver module, an acknowledgement response to the first terminal, if it is determined that the communication object identifier indicates the second terminal, and the service type is supported.
  • processing module is specifically configured to:
  • the communication object identifier is an identifier of the second terminal, or the communication object identifier is a group identifier of a communication group that is interested in the second terminal.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is received
  • the transceiver module is further configured to:
  • the acknowledgement response is sent on the response time-frequency resource.
  • connection establishment request message further includes an optional time-frequency resource of the subsequent service information interaction or the communication capability of the first terminal, where the communication capability of the first terminal is used to confirm with the first terminal. Time-frequency resources used for subsequent business information interaction.
  • the transceiver module is further configured to:
  • connection confirmation response message Before sending the acknowledgment response to the first terminal, sending a connection confirmation response message to the first terminal, where the connection confirmation response message includes the communication capability of the second terminal;
  • Receiving time-frequency resource information sent by the first terminal, and performing service information interaction with the first terminal on the time-frequency resource indicated by the time-frequency resource information, where the time-frequency resource information is the first A terminal is determined according to the communication capability of the second terminal.
  • a terminal of the embodiment of the present application includes a memory and a processor, where the memory is used to store program instructions;
  • the processor is configured to read a program in the memory and perform the following process:
  • connection establishment request message includes a communication object identifier and a service type, and the communication object identifier is used to indicate a communication group to be joined by the second terminal or the second terminal;
  • the processor is specifically configured to:
  • connection establishment request message is broadcast using a control channel, or a time-frequency resource currently available in the traffic channel and satisfying the delay requirement.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is
  • the processor is specifically configured to:
  • the processor is further configured to:
  • connection confirmation response message Before receiving the acknowledgment response sent by the second terminal, receiving a connection confirmation response message sent by the second terminal, where the connection confirmation response message includes the communication capability of the second terminal;
  • the communication capability determines a time-frequency resource for the subsequent service information interaction and sends the time-frequency resource to the second terminal.
  • connection establishment request message further includes an optional time-frequency resource for subsequent service information interaction.
  • connection establishment request message further includes a communication capability of the first terminal, where the communication capability of the first terminal is used to confirm time-frequency resources used by the second terminal to interact with subsequent service information.
  • the communication object identifier is an identifier of the second terminal
  • the processor is specifically configured to:
  • connection establishment request message further includes an interaction identifier that is allocated by the first terminal to the second terminal, and is used to identify the second terminal when the subsequent service information is exchanged.
  • the processor is further configured to:
  • the retransmission or the retransmission is repeated multiple times according to the first set period.
  • the connection establishment request message is described.
  • the communication object identifier is a group identifier of a communication group with the first terminal as a group header, and the second terminal dynamically joins the communication group;
  • the processor is specifically configured to:
  • the processor is further configured to:
  • the other terminal After establishing the connection between the second terminal and the communication group, if receiving an acknowledgment response sent by another terminal, the other terminal establishes a connection with the communication group.
  • the processor is further configured to:
  • connection establishment request message is broadcasted according to the second setting period.
  • the processor is further configured to:
  • the intra-group identifier is assigned to the terminal that establishes a connection with the communication group.
  • the computer storage medium of the present application is characterized in that the computer readable storage medium stores computer executable instructions for causing the computer to perform the first aspect described above. Method embodiments are described.
  • a terminal of the embodiment of the present application includes:
  • a memory for storing program instructions
  • a processor that reads a program in memory and performs the following procedures:
  • connection establishment request message sent by the first terminal, where the connection establishment request message includes a communication object identifier and a service type determined by the first terminal;
  • the processor is specifically configured to:
  • the communication object identifier is an identifier of the second terminal, or the communication object identifier is a group identifier of a communication group that is interested in the second terminal.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is
  • the processor is specifically configured to:
  • the acknowledgement response is sent on the response time-frequency resource.
  • connection establishment request message further includes an optional time-frequency resource of the subsequent service information interaction or a communication capability of the first terminal, where the communication capability of the first terminal is used to confirm with the first terminal. Time-frequency resources used for subsequent business information interaction.
  • the processor is further configured to:
  • connection confirmation response message Before sending the acknowledgment response to the first terminal, sending a connection confirmation response message to the first terminal, where the connection confirmation response message includes the communication capability of the second terminal; and receiving the time frequency sent by the first terminal Resource information, and performing service information interaction with the first terminal on the time-frequency resource indicated by the time-frequency resource information, where the time-frequency resource information is the communication of the first terminal according to the second terminal Ability to determine.
  • the embodiment of the present application is a computer storage medium, where the computer readable storage medium stores computer executable instructions, and the computer executable instructions are used to cause the computer to execute the method embodiment of the second aspect. .
  • FIG. 1 is a system architecture diagram of a connection establishment method according to an embodiment of the present application
  • connection establishment method is a schematic flowchart of a connection establishment method according to an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a first terminal according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a second terminal according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of another first terminal according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another second terminal according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present application.
  • the vehicle-to-network wireless communication system involved in the embodiment of the present application is specifically an LTE (Long Term Evolution) V2X system, and the terminal involved is a terminal (also referred to as a user equipment) in the LTE V2X system.
  • a V2V terminal, a V2I terminal, or a V2P terminal, etc. may be a smart vehicle.
  • the first terminal refers to a terminal that initiates a communication connection
  • the second terminal refers to a terminal that receives a communication connection request.
  • FIG. 1 is a schematic structural diagram of a connection establishment method according to an embodiment of the present application.
  • the first terminal 101 and the second terminal 102 may be included in the communication system.
  • the data can be transmitted between the first terminal 101 and the second terminal 102 through the PC5 interface.
  • the communication system may further include a device such as a base station, but since it does not involve the establishment of a connection between terminals, it will not be described again.
  • FIG. 2 is a schematic diagram of a connection establishment method provided in an embodiment of the present application, which specifically includes the following steps:
  • Step S201 The first terminal determines the communication object, and broadcasts a connection establishment request message.
  • the connection establishment request message includes a communication object identifier and a service type, and the communication object identifier is used to indicate the second terminal or the second terminal.
  • Step S202 The second terminal receives the connection establishment request message sent by the first terminal, and if it is determined that the communication object identifier indicates the second terminal, and the second terminal supports the service type, then the first terminal The terminal sends a confirmation response;
  • Step S203 The first terminal, if receiving the acknowledgment response sent by the second terminal, confirms establishing a connection with the communication target.
  • the process of establishing a connection by the first terminal may include determining a communication object and broadcasting a connection establishment request message, and if receiving the confirmation response sent by the second terminal, determining to successfully establish a connection with the communication object.
  • the communication object identifier in the connection establishment request message may indicate at least one second terminal. Therefore, if the first terminal needs to initiate unicast, the terminal identifier may indicate a terminal, and if the first terminal needs to initiate multicast, the The communication object identifier indicates the communication group to be joined by the terminal, thereby solving the technical problem that the unicast or multicast cannot be established between the terminals in the LTE V2X system in the prior art.
  • the first terminal may parse the basic broadcast security message and combine the behavior of the terminal, and if it determines that the preset service scenario is currently met, the first terminal needs to communicate with other terminals, and then parses the message. And data analysis processing, determining a communication object, and broadcasting a connection establishment request message.
  • the preset service scenario may be that the first terminal determines that the current driving is dangerous according to the basic broadcast security message and its own behavior, triggers an application such as a pre-crash pre-crash warning or a see through unicast communication, and determines that the device needs to be initiated.
  • Connection establishment request For another example, if the first terminal determines that it currently needs to exchange a large amount of information with another terminal, or needs to perform high frequency communication with another terminal (ie, needs to interact multiple times and the interaction period is short), or needs to cooperate with another When the terminal exchanges highly reliable information, it is determined that a connection establishment request needs to be initiated.
  • the connection establishment request message includes at least a communication object identifier and a service type.
  • the communication object identifier is used to indicate the communication group that the second terminal or the terminal to join, that is, the identity of the communication object that needs to be connected. Specifically, if the first terminal determines that a unicast communication connection needs to be established with a second terminal, the communication object is the second terminal, and correspondingly, the communication object identifier is the identifier of the second terminal, such as analyzing according to the basic broadcast security message.
  • the obtained layer 2 identifier (source layer-2ID) of the second terminal is used to indicate the communication group that the second terminal or the terminal to join, that is, the identity of the communication object that needs to be connected. Specifically, if the first terminal determines that a unicast communication connection needs to be established with a second terminal, the communication object is the second terminal, and correspondingly, the communication object identifier is the identifier of the second terminal, such as analyzing according to the basic broadcast security message.
  • the communication object is a communication group with the first terminal as a group header (manager), and the communication object identifier is a group identifier of the communication group, before the multicast is successfully established,
  • the communication group includes only the first terminal, and the second terminal and other terminals can dynamically join the communication group.
  • the service type may be a service type of the target service type pre-configured by the LTE V2X system or a delay requirement of the communication connection to be established, or a service priority of the service to which the communication connection belongs, or may be further determined by a person skilled in the art.
  • Other indicator parameters defined by the actual requirements for identifying the current nature of the communication connection to be established, etc., are not specifically limited in this application.
  • the first terminal may broadcast a connection establishment request message through a dedicated control channel.
  • the dedicated control channel can be transmitted on a different carrier than the SPS service, and can be transmitted using a higher transmission rate.
  • the first terminal may also use a traffic channel to broadcast a connection setup request message, for example, setting a highest priority for sending a connection setup request message, preferentially using an authorized time-frequency that is currently available in the traffic channel and meeting the delay requirement.
  • the resource sends the connection establishment request message. If the first terminal does not currently have the authorized resource that meets the delay requirement, the first terminal may select the appropriate time-frequency resource to send the connection establishment request message by using a sensing mechanism or other collision avoidance mechanism, and provide the uplink transmit power to improve the transmit power. Improve the reliability of the message method.
  • other terminals that have listened to the connection establishment request message may also perform corresponding backoff processing.
  • connection establishment request message may further indicate that the response time-frequency resource used by the second terminal to send an acknowledgment response, and therefore, after the first terminal broadcasts the connection establishment request message, the response time-frequency may be The resource waits for an acknowledgment response from the second terminal.
  • step S202 after receiving the connection establishment request message broadcast by the first terminal, the second terminal first determines whether the communication object identifier in the connection establishment request message indicates that it has itself, and if it indicates that it has itself, further determines the second terminal. Whether the type of service indicated by the first terminal in the connection establishment request message is supported (or whether the second terminal is interested in the service type), and if it is determined that the communication object identifier indicates that it is self, and the second terminal supports the service type, Then, the second terminal may send an acknowledgement response to the first terminal according to the service type and the sending capability of the second terminal.
  • the second terminal determines whether the communication object identifier in the connection establishment request message indicates that the self-identification refers to: the second terminal determines whether the communication target identifier is the terminal identifier of the second terminal, or is the communication that is interested in the second terminal. The group ID of the group. If it is determined that the communication object identifier is the terminal identifier of the second terminal or the group identifier of the communication group of interest to the second terminal, it may be determined that the communication object identifier indicates that it is self.
  • the second terminal may send an acknowledgment response on the response time-frequency resource.
  • step S203 if the first terminal receives the acknowledgment response sent by the second terminal, it confirms that the connection is established with the communication object, and if the first terminal is in the set time period after the broadcast connection establishment request message If the acknowledgment response is not received, in order to ensure reliable transmission of the message, retransmission may be considered, such as retransmitting according to the first set period or retransmitting the connection establishment request message multiple times, if the connection establishment request message is retransmitted a specified number of times If the confirmation response has not been received, the connection may be considered to have failed.
  • the set time period indicates a maximum allowable duration of the connection establishment process
  • the first set period is a retransmission period of the connection establishment request message
  • the set time period, the first set period, and the specified retransmission times are all available in the field.
  • the technical personnel are specifically set according to the system requirements, and the present application does not specifically limit this.
  • the communication object is a second terminal
  • the communication object identifier is the identifier of the second terminal, that is, the communication object identifier indicates only the second terminal, and then the first terminal receives the second terminal.
  • the acknowledgment response sent may determine that a unicast connection is established with the second terminal, and if the acknowledgment response of the second terminal is not received within the set time period, message retransmission is performed.
  • the communication identifier is the communication group with the first terminal as the group header, and the communication identifier is the identifier of the communication group. If the first terminal receives the acknowledgment response sent by the other terminal, the deterministic response may be determined. A unicast connection is established with any other terminal, and any other terminal terminal is also connected to the communication group. The other terminal may be the second terminal or other terminals. On the other hand, if the acknowledgment response of any other terminal in the communication group is not received within the set time period, the message is retransmitted.
  • the second terminal refers to the sender of the first acknowledgement message received by the first terminal after the first terminal broadcasts the connection establishment request message, but the content included in the connection establishment request message Applicable to the second terminal and any other terminal.
  • a communication connection is established between the first terminal and the second terminal, which may be completed by one handshake or by multiple handshakes.
  • a person skilled in the art can specifically set the number of handshaking when the communication is indirectly according to the service type of the interaction, and the present application does not specifically limit this. For example, some services with higher latency requirements, such as life safety related services, can be set up to establish a connection through one handshake. If the delay of the service is not high, the connection can be established through multiple handshakes.
  • connection establishment request message may further include an optional time-frequency resource provided by the first terminal for the communication, so as to perform subsequent service information interaction, such as a carrier that the first terminal suggests to use for subsequent service interaction.
  • connection establishment request message may further include a communication capability of the first terminal, for example, a version of the LTE V2X protocol supported by the first terminal, for subsequently cooperating with the second terminal to confirm the time-frequency resource used in the subsequent service interaction.
  • the so-called multiple-handshake establishment communication connection means that the connection establishment information contained in the connection establishment request message is incomplete, for example, may only include the communication object identifier and the service type, and thus, the second terminal cannot determine whether to establish a connection according to the currently acquired information.
  • the second terminal needs to send a connection confirmation response message to the first terminal after receiving the connection establishment request message broadcasted by the first terminal, where the connection confirmation response is sent.
  • the message includes the communication capability of the second terminal, and after receiving the connection confirmation response message, the first terminal determines the time-frequency resource used by the subsequent service interaction according to the communication capability of the second terminal and the communication capability of the second terminal, and notifies the
  • the second terminal may perform subsequent service interaction with the first terminal on the time-frequency resource determined by the first terminal.
  • Another optional implementation manner is: after receiving the connection confirmation response message, the first terminal sends its own communication capability to the second terminal, and the second terminal according to its communication capability and the communication capability of the first terminal, The time-frequency resource used by the subsequent service interaction is determined, and the first terminal is notified.
  • the two communication parties ie, the first terminal and the at least one second terminal
  • the two communication parties can mutually confirm the communication capability of the other party (such as the supported protocol version capability) and the available time-frequency resources, and then establish The connection is provided, so that the reliability of the communication connection can be effectively improved, and the applicability of the connection establishment method provided by the embodiment of the present application is enhanced.
  • the first terminal may be any terminal in the LTE V2X system
  • the second terminal refers to one terminal, that is, any terminal different from the first terminal.
  • the connection establishment request message includes the identifier of the second terminal, the requested service type, and the response for feeding back the confirmation response.
  • the frequency resource and the recommended carrier for subsequent service information interaction are the frequencies that are used to satisfy a unicast connection.
  • the second terminal After receiving the connection establishment request message, the second terminal confirms that the terminal identifier included in the connection establishment request message is its own identity, and confirms that the connection establishment request message can be supported according to the service type list supported by the current second terminal itself.
  • the acknowledgment response may be sent to the first terminal, where the acknowledgment response may be ACK information, according to the current service and the sending capability, and the information may be sent on the recommended carrier provided by the first terminal.
  • the first terminal determines that the connection establishment is successful. Otherwise, if the acknowledgment response is not received within the set time, the message retransmission is performed, such as retransmitting according to the first set period or retransmitting the connection establishment request message multiple times in succession. If the connection establishment request message is retransmitted a specified number of times and the acknowledgment response has not been received, it is determined that the connection has failed.
  • the connection establishment request message may further include an interaction identifier (ID) allocated to the second terminal, where the interaction identifier is used to identify or refer to the second terminal in the subsequent service interaction, which is equivalent to The alias of the second terminal, after the connection is established, if the message header sent by the first terminal on the connection includes the interaction identifier of the second terminal, the message is sent to the second terminal.
  • ID interaction identifier
  • the interaction identifier may be a randomly specified number of bits.
  • the first terminal specifically refers to the manager or group header of a certain communication group
  • the second terminal distinguishes with other terminals other than the first terminal, before the multicast is successfully established, the second terminal and the communication group The connection was not successfully established.
  • the first terminal can directly broadcast the connection establishment request message without separately determining the identifiers of the terminals participating in the communication.
  • the connection establishment request message may include a group identifier of the communication group, a requested service type, a response time-frequency resource for feeding back the confirmation response, and a suggested carrier for subsequent service information interaction.
  • any terminal may use the connection establishment request message if it confirms that it is interested in the communication group specified in the connection establishment request message and supports the service type requested in the connection establishment request message.
  • the acknowledgment response is sent to the first terminal.
  • the sender of the first acknowledgment response received by the first terminal is referred to as the second terminal, but the second terminal sends a confirmation with the other terminal.
  • the terminal status of the response is the same.
  • the first terminal determines that a unicast connection is established with the any terminal, and establishes a connection between the terminal and the communication group (ie, initiates a communication group for the communication group). Multicast). Subsequently, if the first terminal receives the acknowledgment response sent by the other terminal, the other terminal may be added to the multicast, that is, the other terminal establishes a connection with the communication group.
  • the first terminal may also allocate an intra-group identifier to each terminal that joins the multicast.
  • a communication group may be composed of multiple vehicles in a vehicle formation, for example, an operating vehicle, and the like.
  • the first terminal is the front of the fleet, and is also the manager of the communication group, responsible for initiating multicast, and the second terminal is the following in the fleet.
  • a static communication group may refer to a fixed fleet, such as a fleet of operating vehicles, which has a fixed front and a fixed follower; and a semi-static or dynamic communication group refers to a follow-up vehicle, or both the front and the following.
  • a variable fleet of vehicles like a fleet of vehicles with the same target location, may have a follow-up vehicle leaving the fleet, or the front of the vehicle leaves the fleet, and another vehicle in the fleet continues to serve as the front of the vehicle. .
  • the first terminal can determine that the group capacity of the communication group has not reached the set.
  • the upper limit value that is, the maximum number of terminals that the communication group can accommodate
  • the connection establishment request message is broadcasted according to the second set period, so that the terminal that has not previously joined or the terminal that failed to connect before joins the multicast. .
  • the embodiment of the present application further provides a first terminal.
  • the terminal 300 includes:
  • a processing module 301 configured to determine a communication object
  • the transceiver module 302 is configured to: after the processing module determines the communication object, broadcast a connection establishment request message; the connection establishment request message includes a communication object identifier and a service type, where the communication object identifier is used to indicate the second terminal or the a communication group to be joined by the second terminal; and, if an acknowledgment response sent by the second terminal is received, determining to establish a connection with the communication object.
  • the transceiver module 302 is specifically configured to:
  • connection establishment request message is broadcast using a control channel, or a time-frequency resource currently available in the traffic channel and satisfying the delay requirement.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is received
  • the transceiver module 302 is specifically configured to:
  • the transceiver module 302 is further configured to:
  • connection confirmation response message includes a communication capability of the second terminal
  • the processing module 301 is further configured to determine, according to the communication capability of the second terminal, a time-frequency resource for the subsequent service information interaction, and send the time-frequency resource to the second terminal by using the transceiver module 302.
  • connection establishment request message further includes an optional time-frequency resource for subsequent service information interaction.
  • connection establishment request message further includes a communication capability of the first terminal, where the communication capability of the first terminal is used to confirm time-frequency resources used by the second terminal to interact with subsequent service information.
  • the communication object identifier is an identifier of a second terminal
  • the transceiver module 302 is configured to:
  • connection establishment request message further includes an interaction identifier that is allocated by the first terminal to the second terminal, and is used to identify the second terminal when the subsequent service information is exchanged.
  • the transceiver module 302 is further configured to:
  • connection establishment request message is retransmitted or retransmitted multiple times in accordance with the first set period.
  • the communication object identifier is a group identifier of a communication group with the first terminal as a group header, and the second terminal dynamically joins the communication group;
  • the transceiver module 302 is configured to:
  • the transceiver module 302 is further configured to:
  • the transceiver module 302 is further configured to:
  • connection establishment request message is broadcasted according to the second setting period.
  • processing module 301 is further configured to:
  • the terminal After establishing a multicast for the communication group, the terminal establishing a connection with the communication group assigns an intra-group identity.
  • the embodiment of the present application further provides a second terminal.
  • the terminal includes:
  • the transceiver module 402 is configured to receive a connection establishment request message sent by the first terminal, where the connection establishment request message includes a communication object identifier and a service type determined by the first terminal;
  • the processing module 401 is configured to: if it is determined that the communication target identifier indicates the second terminal, and supports the service type, send, by the transceiver module 402, an acknowledgement response to the first terminal.
  • processing module 401 is specifically configured to:
  • the communication object identifier is an identifier of the second terminal, or the communication object identifier is a group identifier of a communication group that is interested in the second terminal.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is received
  • the transceiver module 402 is further configured to:
  • the acknowledgement response is sent on the response time-frequency resource.
  • connection establishment request message further includes an optional time-frequency resource of the subsequent service information interaction or the communication capability of the first terminal, where the communication capability of the first terminal is used to confirm with the first terminal. Time-frequency resources used for subsequent business information interaction.
  • the transceiver module 402 is further configured to:
  • connection confirmation response message Before sending the acknowledgment response to the first terminal, sending a connection confirmation response message to the first terminal, where the connection confirmation response message includes the communication capability of the second terminal;
  • Receiving time-frequency resource information sent by the first terminal, and performing service information interaction with the first terminal on the time-frequency resource indicated by the time-frequency resource information, where the time-frequency resource information is the first A terminal is determined according to the communication capability of the second terminal.
  • the first terminal includes a memory 601, a processor 600, and a transceiver 602;
  • the processor 600 is responsible for managing the bus architecture and the usual processing, and the memory 601 can store data used by the processor 600 when performing operations.
  • the transceiver 602 is configured to receive and transmit data under the control of the processor 600.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 600 and various circuits of memory represented by memory 601.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the processor 600 is responsible for managing the bus architecture and general processing, and the memory 601 can store data used by the processor 600 in performing operations.
  • the flow disclosed in the embodiment of the present application may be applied to the processor 600 or implemented by the processor 600.
  • each step of the signal processing flow may be completed by an integrated logic circuit of hardware in the processor 600 or an instruction in the form of software.
  • the processor 600 can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, and a discrete hardware component, which can be implemented or executed in the embodiment of the present application.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 601, and the processor 600 reads the information in the memory 601 and completes the steps of the signal processing flow in conjunction with its hardware.
  • the processor 600 is configured to read a program in the memory 601 and perform the following processes:
  • connection establishment request message includes a communication object identifier and a service type, and the communication object identifier is used to indicate a communication group to be joined by the second terminal or the second terminal;
  • processor 600 is specifically configured to:
  • connection establishment request message is broadcast using a control channel, or a time-frequency resource currently available in the traffic channel and satisfying the delay requirement.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is
  • the processor 600 is specifically configured to:
  • processor 600 is further configured to:
  • connection confirmation response message Before receiving the acknowledgment response sent by the second terminal, receiving a connection confirmation response message sent by the second terminal, where the connection confirmation response message includes the communication capability of the second terminal;
  • the communication capability determines a time-frequency resource for the subsequent service information interaction and sends the time-frequency resource to the second terminal.
  • connection establishment request message further includes an optional time-frequency resource for subsequent service information interaction.
  • connection establishment request message further includes a communication capability of the first terminal, where the communication capability of the first terminal is used to confirm time-frequency resources used by the second terminal to interact with subsequent service information.
  • the communication object identifier is an identifier of the second terminal
  • the processor 600 is specifically configured to:
  • connection establishment request message further includes an interaction identifier that is allocated by the first terminal to the second terminal, and is used to identify the second terminal when the subsequent service information is exchanged.
  • processor 600 is further configured to:
  • the retransmission or the retransmission is repeated multiple times according to the first set period.
  • the connection establishment request message is described.
  • the communication object identifier is a group identifier of a communication group with the first terminal as a group header, and the second terminal dynamically joins the communication group;
  • the processor 600 is specifically configured to:
  • processor 600 is further configured to:
  • the other terminal After establishing the connection between the second terminal and the communication group, if receiving an acknowledgment response sent by another terminal, the other terminal establishes a connection with the communication group.
  • processor 600 is further configured to:
  • connection establishment request message is broadcasted according to the second setting period.
  • processor 600 is further configured to:
  • the intra-group identifier is assigned to the terminal that establishes a connection with the communication group.
  • the embodiment of the present application provides a computer storage medium storing computer executable instructions for causing the computer to perform a method of establishing a first terminal side connection.
  • the embodiment of the present application further provides a second terminal, as shown in FIG. 6, the first terminal includes a memory 701, a processor 700, and a transceiver 702;
  • the processor 700 is responsible for managing the bus architecture and the usual processing, and the memory 701 can store data used by the processor 700 when performing operations.
  • the transceiver 702 is configured to receive and transmit data under the control of the processor 700.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 700 and various circuits of memory represented by memory 701.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the processor 700 is responsible for managing the bus architecture and general processing, and the memory 701 can store data used by the processor 700 in performing operations.
  • the flow disclosed in the embodiment of the present application may be applied to the processor 700 or implemented by the processor 700.
  • each step of the signal processing flow may be completed by an integrated logic circuit of hardware in the processor 700 or an instruction in the form of software.
  • the processor 700 can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, and a discrete hardware component, which can be implemented or executed in the embodiment of the present application.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 701, and the processor 700 reads the information in the memory 701 and completes the steps of the signal processing flow in conjunction with its hardware.
  • the processor 700 is configured to read a program in the memory 701 and perform the following processes:
  • connection establishment request message sent by the first terminal, where the connection establishment request message includes a communication object identifier and a service type determined by the first terminal;
  • processor 700 is specifically configured to:
  • the communication object identifier is an identifier of the second terminal, or the communication object identifier is a group identifier of a communication group that is interested in the second terminal.
  • connection establishment request message further indicates that the response time-frequency resource used by the second terminal to send the acknowledgement response is
  • the processor 700 is specifically configured to:
  • the acknowledgement response is sent on the response time-frequency resource.
  • connection establishment request message further includes an optional time-frequency resource of the subsequent service information interaction or a communication capability of the first terminal, where the communication capability of the first terminal is used to confirm with the first terminal. Time-frequency resources used for subsequent business information interaction.
  • processor 700 is further configured to:
  • connection confirmation response message Before sending the acknowledgment response to the first terminal, sending a connection confirmation response message to the first terminal, where the connection confirmation response message includes the communication capability of the second terminal; and receiving the time frequency sent by the first terminal Resource information, and performing service information interaction with the first terminal on the time-frequency resource indicated by the time-frequency resource information, where the time-frequency resource information is the communication of the first terminal according to the second terminal Ability to determine.
  • the embodiment of the present application further provides a computer storage medium storing computer executable instructions for causing the computer to perform a second terminal side connection establishment method.
  • the embodiment of the present application further provides another terminal, which may be the first terminal or the second terminal in the embodiment of the present application.
  • the terminal 500 may include a central processing unit (CPU) 501, a memory 502, an input/output device 503, a bus system 504, and the like.
  • the input device may include a keyboard, a mouse, a touch screen, etc.
  • the output device may include a display device such as a liquid crystal display (LCD), a cathode ray tube (CRT), or the like.
  • LCD liquid crystal display
  • CRT cathode ray tube
  • the memory can include read only memory (ROM) and random access memory (RAM) and provides the processor with program instructions and data stored in the memory.
  • ROM read only memory
  • RAM random access memory
  • the memory may be used to store the program of the above connection establishment method.
  • the processor is configured to execute the connection method of the first terminal side or the second terminal side according to the obtained program instruction by calling a program instruction stored in the memory.
  • the computer storage medium in the embodiments of the present application may be any available media or data storage device accessible by the computer, including but not limited to magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (eg, CD, DVD, BD, HVD, etc.), and semiconductor memories (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state hard disk (SSD)).
  • magnetic storage eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical storage eg, CD, DVD, BD, HVD, etc.
  • semiconductor memories such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state hard disk (SSD)).
  • the process of establishing a connection by the first terminal may include determining a communication object and broadcasting a connection establishment request message, and if receiving the confirmation response sent by the second terminal, determining to successfully establish a connection with the communication object.
  • the communication object identifier in the connection establishment request message may indicate at least one second terminal. Therefore, if the first terminal needs to initiate unicast, the second terminal may be indicated in the communication object identifier, and the first terminal needs to initiate multicast.
  • a communication group composed of at least one second terminal is indicated in the communication object identifier, thereby solving the technical problem that the unicast or multicast cannot be established between the terminals in the LTE V2X system in the prior art.
  • embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code. .
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one flow of the flowchart or in more than two flows and/or block diagrams in one or more blocks.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one flow or more than two or more of the flow diagrams and/or one or more blocks of the block diagram.

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Abstract

本申请实施例公开了一种连接建立方法及终端，其中方法包括：第一终端确定通信对象，并广播连接建立请求消息，若接收到第二终端发送的确认响应，则确定与通信对象成功建立了连接。由于连接建立请求消息中的通信对象标识可指示至少一个第二终端，因而若第一终端需要发起单播时，可在通信对象标识指示一个终端，若第一终端需要发起组播则可在通信对象标识中指示终端待加入通信组，从而解决了现有技术中LTE V2X系统中终端之间无法建立单播或组播的技术问题。

Description

一种连接建立方法及终端
本申请要求在2018年2月9日提交中国专利局、申请号为201810137022.0、申请名称为“一种连接建立方法及终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种连接建立方法及终端。
背景技术
车对外界的信息交换(vehicle to everything，V2X)技术借助车-车，车与路测基础设施、车与路人之间的无线通信，可实时感知车辆周边状况、共享道路信息并进行及时预警，已成为当前世界各国解决道路安全问题的一个研究热点。
在现有的LTE V2X技术中(Rel-14LTE V2X技术)，在用户设备(User Equipment，UE)与UE之间传输数据的PC5接口(也称之为直通链路，协议上描述为Sidelink)已经可以支持基本的基于道路安全的业务的传输。其中，主要面向的是数据包大小为50-1200bytes之间的业务包，要求的业务包在规定的覆盖内其传输的可靠性大于95％。
随着车联网技术的进一步发展，新的一些应用场景的出现，例如：车辆编队、高级驾驶、传感器信息共享、以及远程控制等应用。这些应用中有些要求的是一个组内的UE之间的通信，或者两个UE之间的单播的通信。因此，V2X系统需要考虑单播以及组播等场景，然而如何实现UE之间的单播或组播通信，业界目前还没有相应的解决方案。
发明内容
本申请的目的是提供一种连接建立方法及终端，以解决现有技术中的车联网无线系统中终端间之间无法实现单播或组播通信的技术问题。
本申请的目的是通过以下技术方案实现的：
第一方面，本申请实施例一种连接建立方法，包括：
第一终端确定通信对象，并广播连接建立请求消息；所述连接建立请求消息包括通信对象标识和服务类型，所述通信对象标识用于指示第二终端或所述第二终端待加入的通信组；
所述第一终端若接收到所述第二终端发送的确认响应，则确认与所述通信对象建立连 接。
如此，第一终端建立连接的过程可包括，确定通信对象，并广播连接建立请求消息，若接收到第二终端发送的确认响应，则确定与通信对象成功建立了连接。由于连接建立请求消息中的通信对象标识可指示至少一个第二终端，因而若第一终端需要发起单播时，可在通信对象标识指示一个终端，若第一终端需要发起组播则可在通信对象标识中指示终端待加入成的通信组，从而解决了现有技术中LTE V2X系统中终端之间无法建立单播或组播的技术问题。
可选地，所述第一终端广播连接建立请求消息，包括：
所述第一终端使用控制信道，或者业务信道中当前可用且满足时延要求的时频资源广播所述连接建立请求消息。
可选地，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述第一终端接收所述第二终端发送的确认响应，包括：
所述第一终端在所述响应时频资源上接收所述确认响应。
可选地，所述第一终端接收所述第二终端发送的确认响应之前，还包括：
所述第一终端接收所述第二终端发送的连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；
所述第一终端根据所述第二终端的通信能力，确定出后续业务信息交互的时频资源，并发送给所述第二终端。
可选地，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源。
可选地，所述连接建立请求消息中还包括所述第一终端的通信能力，所述第一终端的通信能力用于与所述第二终端确认后续业务信息交互使用的时频资源。
可选地，所述通信对象标识为一个第二终端的标识；
所述第一终端若接收到所述通信对象发送的确认响应，则确定与所述通信对象建立连接，包括：
所述第一终端若接收到所述第二终端发送的确认响应，则确定与所述第二终端建立单播连接。
可选地，所述连接建立请求消息中还包括所述第一终端为所述第二终端分配的交互标识，用于在后续业务信息交互时标识所述第二终端。
可选地，所述第一终端广播连接建立请求消息后，还包括：
所述第一终端若在设定时间段内未收到所述第二终端发送的确认响应或连接建立信 息请求消息，则按照第一设定周期重传或连续多次重传所述连接建立请求消息。
可选地，所述通信对象标识为以所述第一终端为组头的通信组的组标识，所述第二终端动态加入所述通信组；
所述第一终端接收所述通信对象发送的确认响应，则确定与所述通信对象建立连接，包括：
所述第一终端若接收到所述第二终端发送的确认响应，则将所述第二终端与所述通信组建立连接。
可选地，所述第一终端将所述第二终端与所述通信组建立连接后，还包括：
所述第一终端若接收到其他终端发送的确认响应，则将所述其他终端与所述通信组建立连接。
可选地，所述第一终端将所述第二终端与所述通信组建立连接后，还包括：
所述第一终端若确定所述通信组的组容量未到达设定上限值，则按照第二设定周期广播所述连接建立请求消息。
可选地，所述第一终端将所述第二终端与所述通信组建立连接后，还包括为：
所述第一终端为与所述通信组建立连接的终端分配组内标识。
第二方面，本申请实施例另一种连接建立方法，包括：
第二终端接收第一终端发送的连接建立请求消息，所述连接建立请求消息包括所述第一终端确定的通信对象标识和服务类型；
所述第二终端若确定所述通信对象标识指示有所述第二终端，且支持所述服务类型，则向所述第一终端发送确认响应。
可选地，所述第二终端确定所述通信对象标识指示有所述第二终端，包括：
所述第二终端确定所述通信对象标识为所述第二终端的标识，或者所述通信对象标识为所述第二终端感兴趣的通信组的组标识。
可选地，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述第二终端在所述响应时频资源上发送所述确认响应。
可选地，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源或所述第一终端的通信能力，所述第一终端的通信能力用于与所述第一终端确认后续业务信息交互使用的时频资源。
可选地，所述第二终端向所述第一终端发送确认响应之前，还包括：
所述第二终端向所述第一终端发送连接确认响应消息，所述连接确认响应消息中包括 所述第二终端的通信能力；
所述第二终端接收所述第一终端发送的时频资源信息，并在所述时频资源信息指示的时频资源上与所述第一终端进行业务信息交互，其中，所述时频资源信息是所述第一终端根据所述第二终端的通信能力确定出的。
第三方面，本申请实施例一种终端，包括：
处理模块，用于确定通信对象；
收发模块，用于在所述处理模块确定通信对象后，广播连接建立请求消息；所述连接建立请求消息包括通信对象标识和服务类型，所述通信对象标识用于指示至少一个第二终端；以及，若接收到所述第二终端发送的确认响应，则确定与所述通信对象建立连接。
可选地，所述收发模块具体用于：
使用控制信道，或者业务信道中当前可用且满足时延要求的时频资源广播所述连接建立请求消息。
可选地，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述收发模块具体用于：
在所述响应时频资源上接收所述确认响应。
可选地，所述收发模块还用于：
接收所述第二终端发送的连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；
所述处理模块还用于根据所述第二终端的通信能力，确定出后续业务信息交互的时频资源，并通过所述收发模块发送给所述第二终端。
可选地，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源。
可选地，所述连接建立请求消息中还包括所述第一终端的通信能力，所述第一终端的通信能力用于与所述第二终端确认后续业务信息交互使用的时频资源。
可选地，所述通信对象标识为一个第二终端的标识；
所述收发模块具体用于：
若接收到所述第二终端发送的确认响应，则确定与所述第二终端建立单播连接。
可选地，所述连接建立请求消息中还包括所述第一终端为所述第二终端分配的交互标识，用于在后续业务信息交互时标识所述第二终端。
可选地，所述收发模块还用于：
若在设定时间段内未收到所述第二终端发送的确认响应或连接建立信息请求消息，则 按照第一设定周期重传或连续多次重传所述连接建立请求消息。
可选地，所述通信对象标识为以所述第一终端为组头的通信组的组标识，所述第二终端动态加入所述通信组；
所述收发模块具体用于：
若接收到所述第二终端发送的确认响应，则将所述第二终端与所述通信组建立连接。
可选地，所述收发模块还用于：
若接收到其他终端发送的确认响应，则将所述其他终端与所述通信组建立连接。
可选地，所述收发模块还用于：
若确定所述通信组的组容量未到达设定上限值，则按照第二设定周期广播所述连接建立请求消息。
可选地，所述处理模块还用于：
将所述第二终端与所述通信组建立连接后，为与所述通信组建立连接的所述终端分配组内标识。
第四方面，本申请实施例一种终端，包括：
收发模块，用于接收第一终端发送的连接建立请求消息，所述连接建立请求消息包括所述第一终端确定的通信对象标识和服务类型；
处理模块，用于若确定所述通信对象标识指示有所述第二终端，且支持所述服务类型，则通过所述收发模块向所述第一终端发送确认响应。
可选地，所述处理模块具体用于：
确定所述通信对象标识为所述第二终端的标识，或者所述通信对象标识为所述第二终端感兴趣的通信组的组标识。
可选地，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述收发模块还用于：
在所述响应时频资源上发送所述确认响应。
可选地，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源或所述第一终端的通信能力，所述第一终端的通信能力用于与所述第一终端确认后续业务信息交互使用的时频资源。
可选地，所述收发模块还用于：
在向所述第一终端发送确认响应之前，向所述第一终端发送连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；
接收所述第一终端发送的时频资源信息，并在所述时频资源信息指示的时频资源上与所述第一终端进行业务信息交互，其中，所述时频资源信息是所述第一终端根据所述第二终端的通信能力确定出的。
第五方面，本申请实施例一种终端，其包括存储器和处理器，其中，所述存储器用于存储程序指令；
所述处理器，用于读取存储器中的程序并执行下列过程：
确定通信对象，并广播连接建立请求消息；所述连接建立请求消息包括通信对象标识和服务类型，所述通信对象标识用于指示第二终端或所述第二终端待加入的通信组；
若接收到所述第二终端发送的确认响应，则确定与所述通信对象建立连接。
可选的，所述处理器具体用于：
使用控制信道，或者业务信道中当前可用且满足时延要求的时频资源广播所述连接建立请求消息。
可选的，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述处理器具体用于：
在所述响应时频资源上接收所述确认响应。
可选的，所述处理器还用于：
在接收所述第二终端发送的确认响应之前，接收所述第二终端发送的连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；根据所述第二终端的通信能力，确定出后续业务信息交互的时频资源，并发送给所述第二终端。
可选的，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源。
可选的，所述连接建立请求消息中还包括所述第一终端的通信能力，所述第一终端的通信能力用于与所述第二终端确认后续业务信息交互使用的时频资源。
可选的，所述通信对象标识为所述第二终端的标识；
所述处理器具体用于：
若接收到所述第二终端发送的确认响应，则确定与所述第二终端建立单播连接。
可选的，所述连接建立请求消息中还包括所述第一终端为所述第二终端分配的交互标识，用于在后续业务信息交互时标识所述第二终端。
可选的，所述处理器还用于：
在广播连接建立请求消息之后，若在设定时间段内未收到所述第二终端发送的确认响应或连接建立信息请求消息，则按照第一设定周期重传或连续多次重传所述连接建立请求 消息。
可选的，所述通信对象标识为以所述第一终端为组头的通信组的组标识，所述第二终端动态加入所述通信组；
所述处理器具体用于：
若接收到所述第二终端发送的确认响应，则将所述第二终端与所述通信组建立连接。
可选的，所述处理器还用于：
在将所述第二终端与所述通信组建立连接后，若接收到其他终端发送的确认响应，则将所述其他终端与所述通信组建立连接。
可选的，所述处理器还用于：
在将所述第二终端与所述通信组建立连接后，若确定所述通信组的组容量未到达设定上限值，则按照第二设定周期广播所述连接建立请求消息。
可选的，所述处理器还用于：
在将所述第二终端与所述通信组建立连接后，为与所述通信组建立连接的终端分配组内标识。
第六方面，本申请实施例一种计算机存储介质，其特征在于，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行上述第一方面所述方法实施例。
第七方面，本申请实施例一种终端，包括：
存储器，用于存储程序指令；
处理器，用于读取存储器中的程序并执行下列过程：
接收第一终端发送的连接建立请求消息，所述连接建立请求消息包括所述第一终端确定的通信对象标识和服务类型；
若确定所述通信对象标识指示有所述第二终端，且支持所述服务类型，则向所述第一终端发送确认响应。
可选的，所述处理器具体用于：
确定所述通信对象标识为所述第二终端的标识，或者所述通信对象标识为所述第二终端感兴趣的通信组的组标识。
可选的，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述处理器具体用于：
在所述响应时频资源上发送所述确认响应。
可选的，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源或所述第一终端的通信能力，所述第一终端的通信能力用于与所述第一终端确认后续业务信息交互使用的时频资源。
可选的，所述处理器还用于：
向所述第一终端发送确认响应之前，向所述第一终端发送连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；接收所述第一终端发送的时频资源信息，并在所述时频资源信息指示的时频资源上与所述第一终端进行业务信息交互，其中，所述时频资源信息是所述第一终端根据所述第二终端的通信能力确定出的。
第八方面，本申请实施例一种计算机存储介质，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行上述第二方面所述方法实施例。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的连接建立方法所适用的系统架构图；
图2为本申请实施例提供的一种连接建立方法所对应的流程示意图；
图3为本申请实施例提供的一种第一终端的结构示意图；
图4为本申请实施例提供的一种第二终端的结构示意图；
图5为本申请实施例提供的另一种第一终端的结构示意图；
图6为本申请实施例提供的另一种第二终端的结构示意图；
图7为本申请实施例提供的终端的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述，显然，所描述的实施例，仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
本申请实施例中所涉及到的车联网无线通信系统具体为LTE(Long Term Evolution， 长期演进)V2X系统，所涉及到的终端为该LTE V2X系统中的终端(也称之为用户设备)，例如V2V终端、V2I终端或者V2P终端等，具体来说，可以是智能车辆。为例简便起见，第一终端是指发起通信连接的终端，第二终端是指接收通信连接请求的终端。
下面结合说明书附图，对本申请实施例提供的技术方案进行详细说明。
图1所示为本申请实施例提供的一种连接建立方法所适用的架构示意图。如图1所示，该通信系统中可以包括第一终端101和第二终端102。其中，第一终端101和第二终端102之间可通过PC5接口传输数据。该通信系统中还可进一步包括基站等设备，但由于不涉及终端之间连接的建立，因此不再赘述。
图2所示为本申请实施例中提供的一种连接建立方法，其具体包括如下步骤：
步骤S201:第一终端确定通信对象，并广播连接建立请求消息；所述连接建立请求消息包括通信对象标识和服务类型，所述通信对象标识用于指示所述第二终端或所述第二终端待加入的通信组；
步骤S202：第二终端接收第一终端发送的连接建立请求消息，若确定所述通信对象标识指示有所述第二终端，且所述第二终端支持所述服务类型，则向所述第一终端发送确认响应；
步骤S203：所述第一终端若接收到所述第二终端发送的确认响应，则确认与所述通信对象建立连接。
如此，第一终端建立连接的过程可包括，确定通信对象，并广播连接建立请求消息，若接收到第二终端发送的确认响应，则确定与通信对象成功建立了连接。由于连接建立请求消息中的通信对象标识可指示至少一个第二终端，因而若第一终端需要发起单播时，可在通信对象标识指示一个终端，若第一终端需要发起组播，则可在通信对象标识中指示终端待加入的通信组，从而解决了现有技术中LTE V2X系统中终端之间无法建立单播或组播的技术问题。
在步骤S201的具体实施中，第一终端可通过解析基本的广播安全消息，并结合自身的行为，若确定当前满足预设的业务场景，第一终端需要与其他终端进行通信，则通过解析消息和数据分析处理，确定通信对象，并广播连接建立请求消息。
例如，所述预设的业务场景可以为第一终端根据基本广播安全消息和自身行为，判断当前行驶存在危险，触发了预碰撞pre-crash预警或see through单播通信等应用，则确定需要发起连接建立请求。又例如，第一终端若判断当前需要与另一终端交互大量信息，或是需与另一终端进行高频率的通信(即需交互多次且交互周期较短)，又或是需要与另一终端交互高可靠性的信息时，确定需要发起连接建立请求。
所述连接建立请求消息中至少包括通信对象标识和服务类型。其中，通信对象标识用于指示第二终端或待终端加入的通信组，即说明所需要连接的通信对象的身份。具体的，若第一终端确定需与一个第二终端建立单播通信连接，则通信对象为该第二终端，相应地，通信对象标识为该第二终端的标识，如根据基本广播安全消息分析得到的第二终端的层二的标识(source layer-2ID)。若第一终端确定需要建立组播连接，则通信对象为以该第一终端为组头(管理者)的通信组，通信对象标识为该通信组的组标识，在未成功建立组播前，该通信组中仅包括第一终端，第二终端和其他终端可动态加入该通信组。
服务类型可以为该LTE V2X系统预先配置的目标业务类型service type或待建立通信连接的时延要求，又或是待建立通信连接所属业务的业务优先级，再或者还可以是本领域技术人员根据实际需求定义的用于标识当前待建立通信连接性质的其他指标参数等，本申请对此不做具体限制。
在步骤S201的具体实施中，第一终端可通过专门的控制信道来广播连接建立请求消息。较佳的，为了避免对SPS(Semi-Persistent Scheduling，半静态调度)资源的影响，该专门的控制信道可以在与SPS业务不同的载波上，而且可以使用较高的发送速率发送。
可选地，第一终端还可使用业务信道来广播连接建立请求消息，例如为发送连接建立请求消息设置最高的优先级，优先使用业务信道中当前可用，且满足时延要求的已授权时频资源发送该连接建立请求消息。若第一终端当前没有满足时延要求的已授权资源，则第一终端可通过感知(sensing)机制或其他冲突避免机制选择合适的时频资源发送该连接建立请求消息，并提供提高发射功率来提高消息方法的可靠性。较佳的，为了进一步保证连接建立请求消息发送的可靠性，监听到该连接建立请求消息的其他终端还可做相应的退避处理。
较佳的，所述连接建立请求消息中还可指示有所述第二终端发送确认响应时使用的响应时频资源，因而，第一终端广播该连接建立请求消息后，可在该响应时频资源上等待来自第二终端的确认响应。
在步骤S202的具体实施中，第二终端接收第一终端广播的连接建立请求消息后，首先判断连接建立请求消息中的通信对象标识是否指示有自身，若指示有自身，则进一步判断第二终端是否支持第一终端在该连接建立请求消息中指出的服务类型(或是判断第二终端是否对该服务类型感兴趣)，若确定通信对象标识指示有自身，且第二终端支持该服务类型，则第二终端可根据该服务类型结合第二终端的发送能力，向第一终端发送确认响应。
具体的，第二终端判断连接建立请求消息中的通信对象标识是否指示有自身是指：第二终端判断该通信对象标识是否为第二终端的终端标识，或者是否是第二终端感兴趣的通 信组的组标识。若确定该通信对象标识为第二终端的终端标识或第二终端感兴趣的通信组的组标识，则可确定通信对象标识指示有自身。
较佳的，若第一终端在连接建立请求消息中指示有用于发送确认响应的响应时频资源，则第二终端可在该响应时频资源上发送确认响应。
在步骤S203的具体实施中，第一终端若接收到第二终端发送的确认响应，则确认与通信对象建立连接，反之，若第一终端在广播连接建立请求消息后的设定时间段内都未收到确认响应，为了保证消息的可靠传输，可考虑重传，如按照第一设定周期重传或者连续多次重传该连接建立请求消息，若重传指定次数的连接建立请求消息后，仍未收到确认响应，则可认为连接失败。
上述设定时间段表示连接建立过程的最大允许时长，第一设定周期为连接建立请求消息的重传周期，且上述设定时间段、第一设定周期和指定重传次数均可由本领域技术人员根据系统需求而具体设定，本申请对此不做具体限制。
具体的，在单播场景下，通信对象为一个第二终端，通信对象标识为该第二终端的标识，即通信对象标识仅指示有该第二终端，那么若第一终端接收到第二终端发送的确认响应，则可确定与该第二终端建立了单播连接，若在设定时间段内未收到第二终端的确认响应，则进行消息重传。
在组播场景下，由于通信对象为以第一终端为组头的通信组，通信标识为该通信组的标识，那么若第一终端接收到该任一其他终端发送的确认响应，则可确定与该任一其他终端建立了单播连接，同时也将该任一其他终端终端与该通信组建立了连接，其中该任一其他终端可以是第二终端，也可以是其他终端。反之若在设定时间段内未收到该通信组内任一其他终端的确认响应，则进行消息重传。
进一步地，在多播的场景下，第二终端是指第一终端广播连接建立请求消息后，第一终端接收到的第一个确认消息应答的发送者，但连接建立请求消息中包括的内容适用于第二终端和其他的任一终端。
需要说明的是，本申请实施例中，第一终端与第二终端之间建立通信连接，可通过一次握手完成，也可通过多次握手完成。本领域技术人员可根据交互的服务类型对建立通信间接时的握手次数进行具体的设置，本申请对此不做具体限制。例如，可将一些时延要求比较高的业务，如与生命安全相关的业务，设置为通过一次握手就建立连接，若业务的时延要求不高，则可通过多次握手建立连接。
所谓一次握手就建立通信连接是指，第一终端在发起建立连接时，就将建立连接所需要的信息一次性地全部包含在连接建立请求消息中，广播给第二终端。较佳的，连接建立 请求消息中还可包括第一终端为该次通信提供的可选时频资源，以便后续业务信息交互，如第一终端建议后续业务交互使用的载波。或者，连接建立请求消息中还可包括第一终端的通信能力，例如第一终端支持的LTE V2X协议的版本，用于后续与第二终端共同协商以便确认后续业务交互时使用的时频资源。
所谓多次握手建立通信连接是指，连接建立请求消息中包含的连接建立信息不完备，例如，可能只包含通信对象标识和服务类型，如此，第二终端无法根据当前获取的信息决定是否建立连接，还需做进一步地消息交互和确认才能回复确认响应，因此，第二终端在接收到第一终端广播的连接建立请求消息后，可向第一终端发送连接确认响应消息，其中该连接确认响应消息中包括第二终端的通信能力，进而第一终端接收到该连接确认响应消息后，根据自身的通信能力和第二终端的通信能力，确定出后续业务交互使用的时频资源，并通知第二终端，随后，第二终端可在第一终端确定出的时频资源上与第一终端进行后续的业务交互。另一种可选的实现方式为，第一终端接收到该连接确认响应消息后，将自身的通信能力发送给第二终端，由第二终端根据自身的通信能力和第一终端的通信能力，确定出后续业务交互使用的时频资源，并通知第一终端。
如此，通过一次或多次握手，通信双方(即第一终端和至少一个第二终端)，可相互确认对方的通信能力(如支持的协议版本能力)和可以使用的时频资源后，再建立连接，从而可有效提高通信连接的可靠性，并增强了本申请实施例提供的连接建立方法的适用性。
下面分别针对单播和多播的应用场景进行具体介绍。
1、单播场景下：
在这一场景下，第一终端可为LTE V2X系统中的任一终端，第二终端是指一个终端，即区别于第一终端的任一终端。
第一终端若确定需要与第二终端建立单播连接，则广播连接建立请求消息，其中该连接建立请求消息中包括第二终端的标识、所请求的服务类型、用于反馈确认应答的响应时频资源和用于后续业务信息交互的建议载波。
随后，第二终端接收到该连接建立请求消息后，若确认连接建立请求消息中包含的终端标识为自身的标识，根据当前第二终端自身支持的服务类型列表，也确认可支持连接建立请求消息中所请求的服务类型，并且根据当前的业务以及发送能力，可以在第一终端提供的建议载波上发送信息，则向第一终端发送确认响应，该确认响应可为ACK信息。
进而，第一终端接收到第二终端发送的确认响应后，确定连接建立成功。否则，若在设定时间内都未收到确认响应，则进行消息重传，如按照第一设定周期重传或连续多次重 传所述连接建立请求消息。若连接建立请求消息重传指定次数后，仍未收到确认响应，则确定连接失败。
本申请实施例中，连接建立请求消息中还可进一步包括为第二终端分配的交互标识(ID)，该交互标识用于在后续的业务交互中标识或指代第二终端，相当于为第二终端起的别名，在建立连接后，若第一终端在该连接上发送的消息头中包括第二终端的交互标识，则表示该消息是发送给第二终端的。具体的，考虑到一个终端只能参与到一个单播或广播应用中，该交互标识可以为随机指定的几比特大小。
2、组播场景下：
在这一场景下，第一终端特指某一通信组的管理者或组头，第二终端区别与第一终端以外的其他终端，在组播成功建立前，该第二终端与该通信组并未成功建立连接。
与单播场景不同的是，在组播场景下，第一终端若确认需发起组播，则可直接广播连接建立请求消息，而无需分别确定参与通信的各个终端的标识。具体的，该连接建立请求消息可包括通信组的组标识、所请求的服务类型、用于反馈确认应答的响应时频资源和用于后续业务信息交互的建议载波。
任一终端接收到连接建立请求消息后，若确认自身对连接建立请求消息中所指定的通信组感兴趣，且支持连接建立请求消息中所请求的服务类型，可以使用连接建立请求消息中的建议载波发送信息，则向第一终端发送确认响应，本申请实施例中，将第一终端接收到的第一个确认应答的发送方称之为第二终端，但该第二终端与其他发送确认应答的终端地位相同。
随后，第一终端接收到该任一终端发送的确认响应后，确定与该任一终端建立了单播连接，并将该任一终端与该通信组建立了连接(即发起了针对该通信组的组播)。后续，若第一终端接收到其他终端发送的确认响应，则将上述其他终端加入组播即可，即将该其他终端与通信组建立连接。
为了便于后续的业务交互，当组播建立后，第一终端还可为加入组播的各个终端分配组内标识。
需要说明的是，在具体的应用场景中，通信组可由一个车辆编队中的多台车辆组成，例如，营运车辆等等。其中，第一终端为该车队中的车头，也是该通信组的管理者，负责发起组播，第二终端为该车队中的跟车。
因而，该通信组的成员可以是固定不变的，也可以动态变化的。例如，静态的通信组可指固定的车队，如营运车辆编队，该车队有固定的车头和固定的跟车；而半静态或动态的通信组是指跟车可变，或者车头与跟车均可变的车队，如同方向相同目标地的多台车辆 组成的车队，在行进的过程中，可存在某一跟车离开车队，或者车头离开车队，由车队中的另一车辆继续担任车头等情形。
若通信组为成员可变的通信组，即通信组允许新的车辆加入车队或是车队中原有车辆离开车队脱离该通信组，因而，第一终端可在确定该通信组的组容量未达到设定的上限值(即通信组可容纳的终端的最大数量)时，则按照第二设定周期广播上述连接建立请求消息，以便于之前未加入的终端或是之前连接失败的终端加入组播。
基于同样的发明构思，本申请实施例还提供一种第一终端，如图3所示，该终端300包括：
处理模块301，用于确定通信对象；
收发模块302，用于在所述处理模块确定通信对象后，广播连接建立请求消息；所述连接建立请求消息包括通信对象标识和服务类型，所述通信对象标识用于指示第二终端或所述第二终端待加入的通信组；以及，若接收到所述第二终端发送的确认响应，则确定与所述通信对象建立连接。
可选地，所述收发模块302具体用于：
使用控制信道，或者业务信道中当前可用且满足时延要求的时频资源广播所述连接建立请求消息。
可选地，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述收发模块302具体用于：
在所述响应时频资源上接收所述确认响应。
可选地，所述收发模块302还用于：
接收所述第二终端发送的连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；
所述处理模块301还用于根据所述第二终端的通信能力，确定出后续业务信息交互的时频资源，并通过所述收发模块302发送给所述第二终端。
可选地，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源。
可选地，所述连接建立请求消息中还包括所述第一终端的通信能力，所述第一终端的通信能力用于与所述第二终端确认后续业务信息交互使用的时频资源。
可选地，所述通信对象标识为一个第二终端的标识；
所述收发模块302用于：
若接收到所述第二终端发送的确认响应，则确认与所述第二终端建立单播连接。
可选地，所述连接建立请求消息中还包括所述第一终端为所述第二终端分配的交互标识，用于在后续业务信息交互时标识所述第二终端。
可选地，所述收发模块302还用于：
若在设定时间段内未收到所述第二终端发送的确认响应或连接建立信息请求消息，则按照第一设定周期重传或连续多次重传所述连接建立请求消息。
可选地，所述通信对象标识为以所述第一终端为组头的通信组的组标识，所述第二终端动态加入所述通信组；
所述收发模块302用于：
若接收到所述第二终端发送的确认响应，则将所述任一第二终端与所述通信组建立连接。
可选地，所述收发模块302还用于：
若接收到所述通信组内其他终端发送的确认响应，则将所述其他终端与所述通信组建立连接。
可选地，所述收发模块302还用于：
若确定所述通信组的组容量未到达设定上限值，则按照第二设定周期广播所述连接建立请求消息。
可选地，所述处理模块301还用于：
在建立针对所述通信组的组播后，与所述通信组建立连接的终端分配组内标识。
基于同样的发明构思，本申请实施例还提供一种第二终端，如图4所示，该终端包括：
收发模块402，用于接收第一终端发送的连接建立请求消息，所述连接建立请求消息包括所述第一终端确定的通信对象标识和服务类型；
处理模块401，用于若确定所述通信对象标识指示有所述第二终端，且支持所述服务类型，则通过所述收发模块402向所述第一终端发送确认响应。
可选地，所述处理模块401具体用于：
确定所述通信对象标识为所述第二终端的标识，或者所述通信对象标识为所述第二终端感兴趣的通信组的组标识。
可选地，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述收发模块402还用于：
在所述响应时频资源上发送所述确认响应。
可选地，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源或所述第 一终端的通信能力，所述第一终端的通信能力用于与所述第一终端确认后续业务信息交互使用的时频资源。
可选地，所述收发模块402还用于：
在向所述第一终端发送确认响应之前，向所述第一终端发送连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；
接收所述第一终端发送的时频资源信息，并在所述时频资源信息指示的时频资源上与所述第一终端进行业务信息交互，其中，所述时频资源信息是所述第一终端根据所述第二终端的通信能力确定出的。
本申请另一实施例提供了一种第一终端，如图5所示，该第一终端包括存储器601、处理器600和收发机602；
其中，处理器600负责管理总线架构和通常的处理，存储器601可以存储处理器600在执行操作时所使用的数据。收发机602用于在处理器600的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器600代表的一个或多个处理器和存储器601代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器600负责管理总线架构和通常的处理，存储器601可以存储处理器600在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器600中，或者由处理器600实现。在实现过程中，信号处理流程的各步骤可以通过处理器600中的硬件的集成逻辑电路或者软件形式的指令完成。处理器600可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器601，处理器600读取存储器601中的信息，结合其硬件完成信号处理流程的步骤。
其中，处理器600，用于读取存储器601中的程序并执行下列过程：
确定通信对象，并广播连接建立请求消息；所述连接建立请求消息包括通信对象标识和服务类型，所述通信对象标识用于指示第二终端或所述第二终端待加入的通信组；
若接收到所述第二终端发送的确认响应，则确定与所述通信对象建立连接。
可选的，所述处理器600具体用于：
使用控制信道，或者业务信道中当前可用且满足时延要求的时频资源广播所述连接建立请求消息。
可选的，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述处理器600具体用于：
在所述响应时频资源上接收所述确认响应。
可选的，所述处理器600还用于：
在接收所述第二终端发送的确认响应之前，接收所述第二终端发送的连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；根据所述第二终端的通信能力，确定出后续业务信息交互的时频资源，并发送给所述第二终端。
可选的，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源。
可选的，所述连接建立请求消息中还包括所述第一终端的通信能力，所述第一终端的通信能力用于与所述第二终端确认后续业务信息交互使用的时频资源。
可选的，所述通信对象标识为所述第二终端的标识；
所述处理器600具体用于：
若接收到所述第二终端发送的确认响应，则确定与所述第二终端建立单播连接。
可选的，所述连接建立请求消息中还包括所述第一终端为所述第二终端分配的交互标识，用于在后续业务信息交互时标识所述第二终端。
可选的，所述处理器600还用于：
在广播连接建立请求消息之后，若在设定时间段内未收到所述第二终端发送的确认响应或连接建立信息请求消息，则按照第一设定周期重传或连续多次重传所述连接建立请求消息。
可选的，所述通信对象标识为以所述第一终端为组头的通信组的组标识，所述第二终端动态加入所述通信组；
所述处理器600具体用于：
若接收到所述第二终端发送的确认响应，则将所述第二终端与所述通信组建立连接。
可选的，所述处理器600还用于：
在将所述第二终端与所述通信组建立连接后，若接收到其他终端发送的确认响应，则将所述其他终端与所述通信组建立连接。
可选的，所述处理器600还用于：
在将所述第二终端与所述通信组建立连接后，若确定所述通信组的组容量未到达设定上限值，则按照第二设定周期广播所述连接建立请求消息。
可选的，所述处理器600还用于：
在将所述第二终端与所述通信组建立连接后，为与所述通信组建立连接的终端分配组内标识。
本申请实施例提供了一种计算机存储介质，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行第一终端侧连接建立的方法。
本申请实施例还提供了一种第二终端，如图6所示，该第一终端包括存储器701、处理器700和收发机702；
其中，处理器700负责管理总线架构和通常的处理，存储器701可以存储处理器700在执行操作时所使用的数据。收发机702用于在处理器700的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器700代表的一个或多个处理器和存储器701代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器700负责管理总线架构和通常的处理，存储器701可以存储处理器700在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器700中，或者由处理器700实现。在实现过程中，信号处理流程的各步骤可以通过处理器700中的硬件的集成逻辑电路或者软件形式的指令完成。处理器700可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器701，处理器700读取存储器701中的信息，结合其硬件完成信号处理流程的步骤。
其中，处理器700，用于读取存储器701中的程序并执行下列过程：
接收第一终端发送的连接建立请求消息，所述连接建立请求消息包括所述第一终端确定的通信对象标识和服务类型；
若确定所述通信对象标识指示有所述第二终端，且支持所述服务类型，则向所述第一终端发送确认响应。
可选的，所述处理器700具体用于：
确定所述通信对象标识为所述第二终端的标识，或者所述通信对象标识为所述第二终端感兴趣的通信组的组标识。
可选的，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
所述处理器700具体用于：
在所述响应时频资源上发送所述确认响应。
可选的，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源或所述第一终端的通信能力，所述第一终端的通信能力用于与所述第一终端确认后续业务信息交互使用的时频资源。
可选的，所述处理器700还用于：
向所述第一终端发送确认响应之前，向所述第一终端发送连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；接收所述第一终端发送的时频资源信息，并在所述时频资源信息指示的时频资源上与所述第一终端进行业务信息交互，其中，所述时频资源信息是所述第一终端根据所述第二终端的通信能力确定出的。
本申请实施例还提供了一种计算机存储介质，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行第二终端侧连接建立的方法。
基于同样的发明构思，本申请实施例还提供另一种终端，该终端可以为本申请实施例中的第一终端或第二终端。如图7所示，该终端500可以包括中央处理器(Center Processing Unit，CPU)501、存储器502、输入/输出设备503及总线系统504等。其中，输入设备可以包括键盘、鼠标、触摸屏等，输出设备可以包括显示设备，如液晶显示器(Liquid Crystal Display，LCD)、阴极射线管(Cathode Ray Tube，CRT)等。
存储器可以包括只读存储器(ROM)和随机存取存储器(RAM)，并向处理器提供存储器中存储的程序指令和数据。在本申请实施例中，存储器可以用于存储上述连接建立方法的程序。
处理器通过调用存储器存储的程序指令，处理器用于按照获得的程序指令执行上述第一终端侧或第二终端侧的连接方法。
本申请实施例中的计算机存储介质可以是计算机能够存取的任何可用介质或数据存储设备，包括但不限于磁性存储器(例如软盘、硬盘、磁带、磁光盘(MO)等)、光学存储器(例如CD、DVD、BD、HVD等)、以及半导体存储器(例如ROM、EPROM、EEPROM、非易失性存储器(NAND FLASH)、固态硬盘(SSD))等。
由上述内容可以看出：
如此，第一终端建立连接的过程可包括，确定通信对象，并广播连接建立请求消息，若接收到第二终端发送的确认响应，则确定与通信对象成功建立了连接。由于连接建立请求消息中的通信对象标识可指示至少一个第二终端，因而若第一终端需要发起单播时，可在通信对象标识指示一个第二终端，若第一终端需要发起组播则可在通信对象标识中指示由至少一个第二终端组成的通信组，从而解决了现有技术中LTE V2X系统中终端之间无法建立单播或组播的技术问题。
本领域内的技术人员应明白，本申请实施例可提供为方法、系统、或计算机程序产品。因此，本申请实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请实施例可采用在一个或两个以上其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或两个以上流程和/或方框图一个方框或两个以上方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或两个以上流程和/或方框图一个方框或两个以上方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或两个以上流程和/或方框图一个方框或两个以上方框中指定的功能的步骤。
尽管已描述了本申请的可选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括可选实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和 范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (56)

  1. 一种连接建立方法，其特征在于，应用于车联网无线通信系统，所述方法包括：
    第一终端确定通信对象，并广播连接建立请求消息；所述连接建立请求消息包括通信对象标识和服务类型，所述通信对象标识用于指示第二终端或所述第二终端待加入的通信组；
    所述第一终端若接收到所述第二终端发送的确认响应，则确定与所述通信对象建立连接。
  2. 根据权利要求1所述的方法，其特征在于，所述第一终端广播连接建立请求消息，包括：
    所述第一终端使用控制信道，或者业务信道中当前可用且满足时延要求的时频资源广播所述连接建立请求消息。
  3. 根据权利要求1所述的方法，其特征在于，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
    所述第一终端接收所述第二终端发送的确认响应，包括：
    所述第一终端在所述响应时频资源上接收所述确认响应。
  4. 根据权利要求3所述的方法，其特征在于，所述第一终端接收所述第二终端发送的确认响应之前，还包括：
    所述第一终端接收所述第二终端发送的连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；
    所述第一终端根据所述第二终端的通信能力，确定出后续业务信息交互的时频资源，并发送给所述第二终端。
  5. 根据权利要求3所述的方法，其特征在于，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源。
  6. 根据权利要求3所述的方法，其特征在于，所述连接建立请求消息中还包括所述第一终端的通信能力，所述第一终端的通信能力用于与所述第二终端确认后续业务信息交互使用的时频资源。
  7. 根据权利要求4至6中任一项所述的方法，其特征在于，所述通信对象标识为所述第二终端的标识；
    所述第一终端若接收到所述通信对象发送的确认响应，则确定与所述通信对象建立连接，包括：
    所述第一终端若接收到所述第二终端发送的确认响应，则确定与所述第二终端建立单 播连接。
  8. 根据权利要求7所述的方法，其特征在于，所述连接建立请求消息中还包括所述第一终端为所述第二终端分配的交互标识，用于在后续业务信息交互时标识所述第二终端。
  9. 根据权利要求7中所述的方法，其特征在于，所述第一终端广播连接建立请求消息之后，还包括：
    所述第一终端若在设定时间段内未收到所述第二终端发送的确认响应或连接建立信息请求消息，则按照第一设定周期重传或连续多次重传所述连接建立请求消息。
  10. 根据权利要求4至6中任一项所述的方法，其特征在于，所述通信对象标识为以所述第一终端为组头的通信组的组标识，所述第二终端动态加入所述通信组；
    所述第一终端接收所述通信对象发送的确认响应，则确定与所述通信对象建立连接，包括：
    所述第一终端若接收到所述第二终端发送的确认响应，则将所述第二终端与所述通信组建立连接。
  11. 根据权利要求10所述的方法，其特征在于，所述第一终端将所述第二终端与所述通信组建立连接后，还包括：
    所述第一终端若接收到其他终端发送的确认响应，则将所述其他终端与所述通信组建立连接。
  12. 根据权利要求10所述的方法，其特征在于，所述第一终端将所述第二终端与所述通信组建立连接后，还包括：
    所述第一终端若确定所述通信组的组容量未到达设定上限值，则按照第二设定周期广播所述连接建立请求消息。
  13. 根据权利要求10所述的方法，其特征在于，所述第一终端将所述第二终端与所述通信组建立连接后，还包括：
    所述第一终端为与所述通信组建立连接的终端分配组内标识。
  14. 一种连接建立方法，其特征在于，应用于车联网无线通信系统，所述方法包括：
    第二终端接收第一终端发送的连接建立请求消息，所述连接建立请求消息包括所述第一终端确定的通信对象标识和服务类型；
    所述第二终端若确定所述通信对象标识指示有所述第二终端，且支持所述服务类型，则向所述第一终端发送确认响应。
  15. 根据权利要求14所述的方法，其特征在于，所述第二终端确定所述通信对象标 识指示有所述第二终端，包括：
    所述第二终端确定所述通信对象标识为所述第二终端的标识，或者所述通信对象标识为所述第二终端感兴趣的通信组的组标识。
  16. 根据权利要求15中所述的方法，其特征在于，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
    所述第二终端向所述第一终端发送确认响应，包括：
    所述第二终端在所述响应时频资源上发送所述确认响应。
  17. 根据权利要求16所述的方法，其特征在于，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源或所述第一终端的通信能力，所述第一终端的通信能力用于与所述第一终端确认后续业务信息交互使用的时频资源。
  18. 根据权利要求16所述的方法，其特征在于，所述第二终端向所述第一终端发送确认响应之前，还包括：
    所述第二终端向所述第一终端发送连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；
    所述第二终端接收所述第一终端发送的时频资源信息，并在所述时频资源信息指示的时频资源上与所述第一终端进行业务信息交互，其中，所述时频资源信息是所述第一终端根据所述第二终端的通信能力确定出的。
  19. 一种第一终端，其特征在于，包括：
    处理模块，用于确定通信对象；
    收发模块，用于在所述处理模块确定通信对象后，广播连接建立请求消息；所述连接建立请求消息包括通信对象标识和服务类型，所述通信对象标识用于指示第二终端或所述第二终端待加入的通信组；以及，若接收到所述第二终端发送的确认响应，则确定与所述通信对象建立连接。
  20. 根据权利要求19所述的终端，其特征在于，所述收发模块具体用于：
    使用控制信道，或者业务信道中当前可用且满足时延要求的时频资源广播所述连接建立请求消息。
  21. 根据权利要求19所述的终端，其特征在于，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
    所述收发模块具体用于：
    在所述响应时频资源上接收所述确认响应。
  22. 根据权利要求21所述的终端，其特征在于，所述收发模块还用于：
    接收所述第二终端发送的连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；
    所述处理模块还用于根据所述第二终端的通信能力，确定出后续业务信息交互的时频资源，并通过所述收发模块发送给所述第二终端。
  23. 根据权利要求21所述的终端，其特征在于，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源。
  24. 根据权利要求21所述的终端，其特征在于，所述连接建立请求消息中还包括所述第一终端的通信能力，所述第一终端的通信能力用于与所述第二终端确认后续业务信息交互使用的时频资源。
  25. 根据权利要求22至24中任一项所述的终端，其特征在于，所述通信对象标识为所述第二终端的标识；
    所述收发模块具体用于：
    若接收到所述第二终端发送的确认响应，则确定与所述第二终端建立单播连接。
  26. 根据权利要求25所述的终端，其特征在于，所述连接建立请求消息中还包括所述第一终端为所述第二终端分配的交互标识，用于在后续业务信息交互时标识所述第二终端。
  27. 根据权利要求25中所述的终端，其特征在于，所述收发模块还用于：
    若在设定时间段内未收到所述第二终端发送的确认响应或连接建立信息请求消息，则按照第一设定周期重传或连续多次重传所述连接建立请求消息。
  28. 根据权利要求22至23中任一项所述的终端，其特征在于，所述通信对象标识为以所述第一终端为组头的通信组的组标识，所述第二终端动态加入所述通信组；
    所述收发模块具体用于：
    若接收到所述第二终端发送的确认响应，则将所述第二终端与所述通信组建立连接。
  29. 根据权利要求28所述的终端，其特征在于，所述收发模块还用于：
    若接收到其他终端发送的确认响应，则将所述其他终端与所述通信组建立连接。
  30. 根据权利要求28所述的终端，其特征在于，所述收发模块还用于：
    若确定所述通信组的组容量未到达设定上限值，则按照第二设定周期广播所述连接建立请求消息。
  31. 根据权利要求28所述的终端，其特征在于，所述处理模块还用于：
    将所述第二终端与所述通信组建立连接后，为与所述通信组建立连接的终端分配组内标识。
  32. 一种第二终端，其特征在于，包括：
    收发模块，用于接收第一终端发送的连接建立请求消息，所述连接建立请求消息包括所述第一终端确定的通信对象标识和服务类型；
    处理模块，用于若确定所述通信对象标识指示有所述第二终端，且支持所述服务类型，则向所述第一终端发送确认响应。
  33. 根据权利要求32所述的终端，其特征在于，所述处理模块具体用于：
    确定所述通信对象标识为所述第二终端的标识，或者所述通信对象标识为所述第二终端感兴趣的通信组的组标识。
  34. 根据权利要求33中所述的终端，其特征在于，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
    所述收发模块还用于：
    在所述响应时频资源上发送所述确认响应。
  35. 根据权利要求34所述的终端，其特征在于，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源或所述第一终端的通信能力，所述第一终端的通信能力用于与所述第一终端确认后续业务信息交互使用的时频资源。
  36. 根据权利要求34所述的终端，其特征在于，所述收发模块还用于：
    在向所述第一终端发送连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；
    接收所述第一终端发送的时频资源信息，并在所述时频资源信息指示的时频资源上与所述第一终端进行业务信息交互，其中，所述时频资源信息是所述第一终端根据所述第二终端的通信能力确定出的。
  37. 一种第一终端，其特征在于，包括：
    存储器，用于存储程序指令；
    处理器，用于读取存储器中的程序并执行下列过程：
    确定通信对象，并广播连接建立请求消息；所述连接建立请求消息包括通信对象标识和服务类型，所述通信对象标识用于指示第二终端或所述第二终端待加入的通信组；
    若接收到所述第二终端发送的确认响应，则确定与所述通信对象建立连接。
  38. 根据权利要求37所述的终端，其特征在于，所述处理器具体用于：
    使用控制信道，或者业务信道中当前可用且满足时延要求的时频资源广播所述连接建立请求消息。
  39. 根据权利要求37所述的终端，其特征在于，所述连接建立请求消息中还指示有 所述第二终端发送所述确认响应时使用的响应时频资源；
    所述处理器具体用于：
    在所述响应时频资源上接收所述确认响应。
  40. 根据权利要求39所述的终端，其特征在于，所述处理器还用于：
    在接收所述第二终端发送的确认响应之前，接收所述第二终端发送的连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；根据所述第二终端的通信能力，确定出后续业务信息交互的时频资源，并发送给所述第二终端。
  41. 根据权利要求39所述的终端，其特征在于，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源。
  42. 根据权利要求39所述的终端，其特征在于，所述连接建立请求消息中还包括所述第一终端的通信能力，所述第一终端的通信能力用于与所述第二终端确认后续业务信息交互使用的时频资源。
  43. 根据权利要求40至42中任一项所述的终端，其特征在于，所述通信对象标识为所述第二终端的标识；
    所述处理器具体用于：
    若接收到所述第二终端发送的确认响应，则确定与所述第二终端建立单播连接。
  44. 根据权利要求43所述的终端，其特征在于，所述连接建立请求消息中还包括所述第一终端为所述第二终端分配的交互标识，用于在后续业务信息交互时标识所述第二终端。
  45. 根据权利要求43所述的终端，其特征在于，所述处理器还用于：
    在广播连接建立请求消息之后，若在设定时间段内未收到所述第二终端发送的确认响应或连接建立信息请求消息，则按照第一设定周期重传或连续多次重传所述连接建立请求消息。
  46. 根据权利要求40至42中任一项所述的终端，其特征在于，所述通信对象标识为以所述第一终端为组头的通信组的组标识，所述第二终端动态加入所述通信组；
    所述处理器具体用于：
    若接收到所述第二终端发送的确认响应，则将所述第二终端与所述通信组建立连接。
  47. 根据权利要求46所述的终端，其特征在于，所述处理器还用于：
    在将所述第二终端与所述通信组建立连接后，若接收到其他终端发送的确认响应，则将所述其他终端与所述通信组建立连接。
  48. 根据权利要求46所述的终端，其特征在于，所述处理器还用于：
    在将所述第二终端与所述通信组建立连接后，若确定所述通信组的组容量未到达设定上限值，则按照第二设定周期广播所述连接建立请求消息。
  49. 根据权利要求46所述的终端，其特征在于，所述处理器还用于：
    在将所述第二终端与所述通信组建立连接后，为与所述通信组建立连接的终端分配组内标识。
  50. 一种计算机存储介质，其特征在于，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行如权利要求1至13中任一项所述的方法。
  51. 一种第二终端，其特征在于，包括：
    存储器，用于存储程序指令；
    处理器，用于读取存储器中的程序并执行下列过程：
    接收第一终端发送的连接建立请求消息，所述连接建立请求消息包括所述第一终端确定的通信对象标识和服务类型；
    若确定所述通信对象标识指示有所述第二终端，且支持所述服务类型，则向所述第一终端发送确认响应。
  52. 根据权利要求51所述的终端，其特征在于，所述处理器具体用于：
    确定所述通信对象标识为所述第二终端的标识，或者所述通信对象标识为所述第二终端感兴趣的通信组的组标识。
  53. 根据权利要求52所述的终端，其特征在于，所述连接建立请求消息中还指示有所述第二终端发送所述确认响应时使用的响应时频资源；
    所述处理器具体用于：
    在所述响应时频资源上发送所述确认响应。
  54. 根据权利要求53所述的终端，其特征在于，所述连接建立请求消息中还包括后续业务信息交互的可选时频资源或所述第一终端的通信能力，所述第一终端的通信能力用于与所述第一终端确认后续业务信息交互使用的时频资源。
  55. 根据权利要求53所述的终端，其特征在于，所述处理器还用于：
    向所述第一终端发送确认响应之前，向所述第一终端发送连接确认响应消息，所述连接确认响应消息中包括所述第二终端的通信能力；接收所述第一终端发送的时频资源信息，并在所述时频资源信息指示的时频资源上与所述第一终端进行业务信息交互，其中，所述时频资源信息是所述第一终端根据所述第二终端的通信能力确定出的。
  56. 一种计算机存储介质，其特征在于，所述计算机可读存储介质存储有计算机可执 行指令，所述计算机可执行指令用于使所述计算机执行如权利要求14至18中任一项所述的方法。
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