Multiple carrier selection method and related devices

Abstract

The application discloses a multi-carrier selection method and related equipment, wherein the method comprises the following steps: a first terminal acquires first configuration information; wherein the first configuration information comprises at least one first carrier information and corresponding first channel congestion parameter information; the first terminal acquires first data; the first terminal selects at least one direct link transmission carrier for the first data according to the first carrier information and the first channel congestion parameter information in a priority order; and the first terminal transmits the first data on the direct link transmission carrier. When the multi-carrier selection is performed at the transmitting end, the selection is performed in a certain order, so that the carrier selected by the transmitting end converges as much as possible, and the receiving end can receive as much data transmitted by the transmitting end as possible.

Description

[0001] This application is a divisional application of the original application with the application number 201780096865.4 and the original filing date of November 16, 2017, and the entire contents of the original application are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and in particular to a multi-carrier selection method and related equipment. BACKGROUND

[0003] A large number of traffic accidents occur around the world every year, causing a large number of casualties and property losses. The main reason for traffic accidents is the lack of reliable information exchange between vehicles. The vehicle networking system aims to improve road safety, improve traffic efficiency and provide rich streaming services for users through communication between vehicles and vehicles (Vehicle to Vehicle, V2V), vehicles and infrastructure / networks (Vehical to Infrasture / Network, V2I / N) and vehicles and pedestrians (Vehical to Pedestrian, V2P).

[0004] Intelligent transportation system (Intelligent Transportation System, ITS) has strict requirements for low latency and high reliability communication of communication. Third generation partnership project (3 rd Generation Partner Project, 3GPP) cellular technology has the advantages of short latency, fast speed, extensive coverage, large capacity, high reliability, etc., so using cellular technology to realize vehicle networking has become the current main trend.

[0005] In the prior art, V2X (V2V, V2I / N, V2P) communication can use direct link communication, i.e. communication between vehicles, and data does not need to be transferred through the base station. The resources for communication between vehicles come from base station configuration or pre-configuration. The link for realizing direct communication between vehicles is called direct link, also called Sidelink (SL). When the terminal device is under network coverage, the resources for direct link communication come from the configuration of the base station, and when the terminal device is not under network coverage, the resources for direct link communication are pre-configured resources. When the terminal device is under network coverage, the terminal devices communicate with each other using direct link, and the communication resources between the terminal devices come from the base station configuration. When the terminal device is not under network coverage, the terminal devices communicate with each other using direct link, and the communication resources between the terminal devices come from pre-configuration.

[0006] Different from traditional point-to-point communication, information in direct link is one-to-many communication, and the receiving capability of different receivers in the system is different. Therefore, there is a contradiction between system performance and receiver capability. At the sending end, if there are multiple carrier frequencies, in order to improve the system performance, the terminal will select the carrier frequency with a smaller channel busy ratio (CBR) to transmit resources, which leads to the sending end to select the carrier frequency more divergently. The receiving end has limited receiving chains, and it can only receive data on a limited number of carrier frequencies at the same time. If the sending end selects the carrier frequency more divergently, the receiving end cannot receive all the data.

[0007] For example, assuming that a terminal (User Equipment, UE) 1 selects to transmit on carrier frequency 3 (F3) and carrier frequency 4 (F4), and a terminal 3 (UE3) selects to transmit on carrier frequency 1 (F1) and carrier frequency 2 (F2), at this time, since the terminal 2 (UE2) has only two receiving chains, at a certain moment, the terminal 2 (UE2) can only receive data of one of the terminal 1 (UE1) and the terminal 3 (UE3), as shown in FIG. 1; or at a certain moment, the terminal 2 (UE2) can only receive part of the data on the terminal 1 (UE1) and the terminal 3 (UE3), as shown in FIG. 2. Figure 1 Figure 2 SUMMARY

[0008] Embodiments of the present application provide a multi-carrier selection method and related equipment, which can select the carrier frequency in a certain order at the sending end, so that the carrier frequency selected by the sending end converges as much as possible, so that the receiving end receives as much data transmitted by the sending end as possible.

[0009] In a first aspect, embodiments of the present application provide a multi-carrier selection method, comprising:

[0010] A first terminal acquires first configuration information; wherein the first configuration information comprises at least one first carrier frequency information and corresponding first channel congestion parameter information;

[0011] The first terminal acquires first data;

[0012] The first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in priority order;

[0013] The first terminal transmits the first data on the direct link transmission carrier frequency.

[0014] ​​The embodiment of the present application can make the first terminal select the transmission carrier frequency in a certain order, so that the transmission carrier frequency selected by the first terminal converges as much as possible, so that the second terminal receives as much data transmitted by the first terminal as possible, improves the communication quality on the direct link, and improves the user experience.

[0015] With reference to the first aspect, in a first implementation manner of the first aspect, the method further includes: obtaining, by the first terminal, at least one priority order information corresponding to the at least one first carrier frequency information;

[0016] The first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order includes:

[0017] The first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order.

[0018] The embodiment of the present application provides a plurality of ways for the first terminal to obtain the priority order information of each first carrier frequency. The first terminal can select the transmission carrier frequency for the first data according to the priority order information of each first carrier frequency, so that the first terminal selects the transmission carrier frequency in a certain order when performing multi-carrier selection, so that the transmission carrier frequency selected by the first terminal converges as much as possible, so that the second terminal receives as much data transmitted by the first terminal as possible.

[0019] With reference to the first aspect or the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the method further includes: obtaining, by the first terminal, first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information;

[0020] The first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order includes:

[0021] The first terminal selects at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information and the first channel congestion parameter information in the priority order; wherein the first identification information includes at least one of the following: service priority of data, destination address of data, and service type of data.

[0022] The embodiment of the present application can preliminarily screen the first carrier frequency matched with the first data through the first identification information of the first carrier frequency, and further select the direct link transmission carrier frequency from the screened first carrier frequency according to the first carrier frequency information and the first channel congestion parameter information in the order of priority, so that the transmission carrier frequency selected by the first terminal converges as much as possible, and the second terminal receives as much data transmitted by the first terminal as possible.

[0023] With reference to the first aspect or the first or second implementation manner of the first aspect, in a third implementation manner of the first aspect, the first channel congestion parameter information includes a first channel congestion threshold or a first channel congestion range.

[0024] In the case that the first channel congestion parameter information includes the first channel congestion threshold, the first terminal selects at least one direct link transmission carrier frequency for the first data in the order of priority according to the carrier frequency information and the first channel congestion parameter information includes:

[0025] selecting at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one first carrier frequency corresponding to the first carrier frequency information in the order of priority; wherein the channel congestion value corresponding to the second carrier frequency is less than or equal to the first channel congestion threshold.

[0026] In the case that the first channel congestion parameter information includes the first channel congestion range, the first terminal selects at least one direct link transmission carrier frequency for the first data in the order of priority according to the carrier frequency information and the first channel congestion parameter information includes:

[0027] selecting at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one first carrier frequency corresponding to the first carrier frequency information in the order of priority; wherein the channel congestion value corresponding to the second carrier frequency belongs to the first channel congestion range.

[0028] The embodiment of the present application first screens the first carrier frequency according to the first channel congestion parameter information, selects the second carrier frequency satisfying the condition, and then selects the transmission carrier frequency from the second carrier frequency in the order of priority, so as to ensure that the channel congestion value of the transmission carrier frequency satisfies the condition and ensures the communication quality.

[0029] With reference to the third implementation manner of the first aspect, in a fourth implementation manner of the first aspect, the selecting at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one first carrier frequency corresponding to the first carrier frequency information in the order of priority includes:

[0030] selecting at least one carrier frequency with the smallest channel congestion value from the second carrier frequency as the direct link transmission carrier frequency.

[0031] The embodiment of the application determines the priority order of each carrier frequency according to the channel congestion value, selects a transmission carrier frequency according to the channel congestion value, and converges the transmission carrier frequency on the carrier frequency with the minimum channel congestion value, so that the second terminal receives as much data as possible transmitted by the first terminal, and improves the communication quality.

[0032] With reference to the third implementation form of the first aspect, in a fifth implementation form of the first aspect, the selecting at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in the at least one first carrier frequency corresponding to the first carrier frequency information according to the priority order comprises:

[0033] selecting at least one second carrier frequency with the highest priority order as the direct link transmission carrier frequency.

[0034] The embodiment of the application selects a transmission carrier frequency according to the priority order of each carrier frequency, converges the transmission carrier frequency on the carrier frequency with the minimum priority order, so that the second terminal receives as much data as possible transmitted by the first terminal, and improves the communication quality.

[0035] With reference to the third or fourth implementation form of the first aspect, in a sixth implementation form of the first aspect, the channel congestion value corresponding to the second carrier frequency is obtained by the first terminal or obtained through receiving dedicated radio resource control (RRC) signaling or a system information block (SIB) message sent by a base station.

[0036] With reference to the third, fourth or sixth implementation form of the first aspect, in a seventh implementation form of the first aspect, the channel congestion value corresponding to the second carrier frequency is the channel congestion value of the first resource set corresponding to the second carrier frequency.

[0037] With reference to the first aspect, in an eighth implementation form of the first aspect, the selecting at least one direct link transmission carrier frequency for the first data by the first terminal according to the first carrier frequency information and the first channel congestion parameter information according to the priority order comprises: in a case where the first terminal satisfies a first condition, the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information according to the priority order.

[0038] The first condition comprises at least one of the following:

[0039] the first terminal performs resource selection or resource reselection on the carrier frequency corresponding to the at least one first carrier frequency information; or

[0040] the first configuration information changes; or

[0041] the first terminal receives dedicated RRC signaling sent by the base station; or

[0042] the first terminal receives a SIB message sent by the base station; or

[0043] the first data allows transmission of a carrier frequency that does not include the currently selected transmission carrier frequency; or

[0044] there is at least one third carrier frequency in the carrier frequency corresponding to the first carrier frequency information, and the priority order of the third carrier frequency is higher than the priority order of at least one carrier frequency in the currently selected transmission carrier frequency; or

[0045] there is at least one third carrier frequency in the carrier frequency corresponding to the first carrier frequency information, and the channel congestion value corresponding to the third carrier frequency is less than the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency; or

[0046] there is at least one third carrier frequency in the carrier frequency corresponding to the first carrier frequency information, and the channel congestion value corresponding to the third carrier frequency is less than the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency, and the difference between the channel congestion value corresponding to the third carrier frequency and the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is greater than or equal to a first threshold value; or

[0047] the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the first terminal is less than or equal to a second channel congestion threshold; or

[0048] the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the first terminal is within a second channel congestion range; or

[0049] the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the first terminal is greater than or equal to a third channel congestion threshold; or

[0050] the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the first terminal does not belong to a third channel congestion range; or

[0051] the carrier frequency selection or carrier frequency reselection timer is cleared;

[0052] wherein the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is the channel congestion value of the second resource set corresponding to the currently selected transmission carrier frequency;

[0053] wherein the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is measured by the first terminal or obtained by receiving a dedicated RRC signaling or a SIB message sent by the base station.

[0054] The embodiments of the present application provide a plurality of trigger conditions for carrier frequency selection or carrier frequency reselection. The carrier frequency selection or carrier frequency reselection can be performed only when the first condition is met, so as to avoid random carrier frequency selection or carrier frequency reselection of the terminal. In the case of guaranteeing that the transmission carrier frequency selected by the terminal converges as much as possible and the receiving end can receive more data as much as possible, the complexity of the receiving end is taken into account, and the communication quality is further improved.

[0055] In a second aspect, the embodiments of the present application provide a method for selecting a plurality of carriers, comprising: sending first configuration information to a first terminal, wherein the first configuration information comprises at least one first carrier information and corresponding first channel congestion parameter information, so that the first terminal selects at least one direct link transmission carrier according to the first carrier information and the first channel congestion parameter information in priority order, and sends first data on the direct link transmission carrier.

[0056] In a first implementation manner of the second aspect, the method further comprises: sending at least one priority order information corresponding to the at least one first carrier information to the first terminal, so that the first terminal selects at least one direct link transmission carrier for the first data according to the first carrier information and the first channel congestion parameter information in priority order, and sends the first data on the direct link transmission carrier.

[0057] In combination with the second aspect or the first implementation manner of the second aspect, the method further comprises: sending first identification information corresponding to the first carrier information and / or the first channel congestion parameter information to the first terminal, so that the first terminal selects at least one direct link transmission carrier for the first data according to the first identification information, the first carrier information and the first channel congestion parameter information in priority order, and sends the first data on the direct link transmission carrier; wherein the first identification information comprises at least one of the following: service priority of data, destination address of data, and service type of data; wherein the first identification information can also be any combination of the service priority of data, the destination address of data and the service type of data, which is not limited in the present application.

[0058] In a third aspect, the embodiments of the present application provide a first terminal, comprising:

[0059] A first obtaining module is configured to obtain first configuration information; wherein the first configuration information comprises at least one first carrier information and corresponding first channel congestion parameter information;

[0060] A second obtaining module is configured to obtain first data.

[0061] The selecting module is configured to select at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in a priority order.

[0062] The sending module is configured to send the first data on the direct link transmission carrier frequency.

[0063] With reference to the third aspect, in a first implementation manner of the third aspect, the terminal further includes:

[0064] The third obtaining module is configured to obtain at least one priority order information corresponding to the at least one first carrier frequency information.

[0065] The selecting module is configured to select at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order information.

[0066] With reference to the third aspect or the first implementation manner of the third aspect, in a second implementation manner of the third aspect, the terminal further includes:

[0067] The fourth obtaining module is configured to obtain first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information.

[0068] The selecting module is configured to select at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information and the first channel congestion parameter information in a priority order; wherein the first identification information includes at least one of the following: a service priority of the data, a destination address of the data, and a service type of the data.

[0069] With reference to the second aspect or the first or second implementation manner of the second aspect, in a third implementation manner of the second aspect, the first channel congestion parameter information includes a first channel congestion threshold or a first channel congestion range.

[0070] In a case where the first channel congestion parameter information includes a first channel congestion threshold, the selecting module is configured to select at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one first carrier frequency corresponding to the first carrier frequency information in a priority order; wherein a channel congestion value corresponding to the second carrier frequency is less than or equal to the first channel congestion threshold.

[0071] In a case where the first channel congestion parameter information comprises a first channel congestion range, the selection module is configured to select at least one direct link transmission carrier for the first data in at least one second carrier in the first carrier corresponding to the at least one first carrier information according to the priority order, wherein the channel congestion value corresponding to the second carrier belongs to the first channel congestion range.

[0072] With reference to the third implementation of the third aspect, in a fourth implementation of the third aspect, the selection module is configured to select at least one carrier with the smallest channel congestion value from the second carriers as the direct link transmission carrier.

[0073] With reference to the third implementation of the third aspect, in a fifth implementation of the third aspect, the selection module is configured to select at least one second carrier with the highest priority order as the direct link transmission carrier.

[0074] With reference to the third or fourth implementation of the third aspect, in a sixth implementation of the third aspect, the channel congestion value corresponding to the second carrier is obtained by the first terminal or through receiving dedicated radio resource control (RRC) signaling or a system information block (SIB) message sent by a base station.

[0075] With reference to the third, fourth or sixth implementation of the third aspect, in a seventh implementation of the third aspect, the channel congestion value corresponding to the second carrier is a channel congestion value of a first resource set corresponding to the second carrier.

[0076] With reference to the third aspect, in an eighth implementation of the third aspect, the selection module is configured to, in a case where the first terminal satisfies a first condition, select at least one direct link transmission carrier for the first data according to the first carrier information and the first channel congestion parameter information according to the priority order;

[0077] The first condition comprises at least one of the following:

[0078] The first terminal performs resource selection or resource reselection on a carrier corresponding to the at least one first carrier information; or

[0079] The first configuration information changes; or

[0080] The first terminal receives dedicated RRC signaling sent by a base station; or

[0081] The first terminal receives a SIB message sent by a base station; or

[0082] The carrier allowed to transmit the first data does not include the currently selected transmission carrier; or

[0083] there is at least one third carrier in the carriers corresponding to the first carrier information, and a priority order of the third carrier is higher than a priority order of at least one carrier in the currently selected transmission carriers; or

[0084] there is at least one third carrier in the carriers corresponding to the first carrier information, and a channel congestion value corresponding to the third carrier is less than a channel congestion value corresponding to at least one carrier in the currently selected transmission carriers; or

[0085] there is at least one third carrier in the carriers corresponding to the first carrier information, a channel congestion value corresponding to the third carrier is less than a channel congestion value corresponding to at least one carrier in the currently selected transmission carriers, and a difference between the channel congestion value corresponding to the third carrier and the channel congestion value corresponding to at least one carrier in the currently selected transmission carriers is greater than or equal to a first threshold; or

[0086] a channel congestion value corresponding to at least one carrier in the currently selected transmission carriers of the first terminal is less than or equal to a second channel congestion threshold; or

[0087] a channel congestion value corresponding to at least one carrier in the currently selected transmission carriers of the first terminal is within a second channel congestion range; or

[0088] a channel congestion value corresponding to at least one carrier in the currently selected transmission carriers of the first terminal is greater than or equal to a third channel congestion threshold; or

[0089] a channel congestion value corresponding to at least one carrier in the currently selected transmission carriers of the first terminal does not belong to a third channel congestion range; or

[0090] a carrier selection or carrier reselection timer is cleared;

[0091] wherein the channel congestion value corresponding to at least one carrier in the currently selected transmission carriers is a channel congestion value of a second resource set corresponding to the currently selected transmission carriers;

[0092] wherein the channel congestion value corresponding to at least one carrier in the currently selected transmission carriers is obtained by the first terminal or obtained through receiving a dedicated RRC signaling or a SIB message sent by a base station.

[0093] It should be noted that the multiple items in the first condition described above can also be combined arbitrarily.

[0094] In a fourth aspect, an embodiment of the present application provides a network device, comprising: a first sending module, configured to send first configuration information to a first terminal, wherein the first configuration information comprises at least one first carrier frequency information and corresponding first channel congestion parameter information, so that the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in a priority order, and sends the first data on the direct link transmission carrier frequency.

[0095] With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the network device further comprises: a second sending module, configured to send at least one priority order information corresponding to the at least one first carrier frequency information to the first terminal, so that the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in a priority order, and sends the first data on the direct link transmission carrier frequency.

[0096] With reference to the fourth aspect or the first implementation manner of the fourth aspect, in a second implementation manner of the fourth aspect, the network device further comprises:

[0097] a third sending module, configured to send first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information to the first terminal, so that the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information and the first channel congestion parameter information in a priority order, and sends the first data on the direct link transmission carrier frequency; wherein the first identification information comprises at least one of the following: a service priority of the data, a destination address of the data, and a service type of the data.

[0098] In a fifth aspect, an embodiment of the present application provides a first terminal, comprising:

[0099] a memory, configured to store program instructions;

[0100] a processor, configured to invoke the program instructions in the memory and perform the following operations:

[0101] obtain first configuration information; wherein the first configuration information comprises at least one first carrier frequency information and corresponding first channel congestion parameter information;

[0102] obtain first data;

[0103] select at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in a priority order;

[0104] send the first data on the direct link transmission carrier frequency.

[0105] With reference to the fifth aspect, in a first implementation form of the fifth aspect, the processor is further configured to obtain at least one priority order information corresponding to the at least one first carrier frequency information.

[0106] The processor selecting the at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order includes: selecting the at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the priority order information.

[0107] With reference to the fifth aspect or the first implementation form of the fifth aspect, in a second implementation form of the fifth aspect, the processor is further configured to obtain first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information.

[0108] The processor selecting the at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order includes:

[0109] selecting the at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information and the first channel congestion parameter information in the priority order, wherein the first identification information includes at least one of a service priority of the data, a destination address of the data, and a service type of the data.

[0110] With reference to the fifth aspect or the first or second implementation form of the fifth aspect, in a third implementation form of the fifth aspect, the first channel congestion parameter information includes a first channel congestion threshold or a first channel congestion range.

[0111] In a case where the first channel congestion parameter information includes the first channel congestion threshold, the processor selecting the at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order includes:

[0112] selecting the at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one of the first carrier frequencies corresponding to the at least one first carrier frequency information in the priority order, wherein a channel congestion value corresponding to the second carrier frequency is less than or equal to the first channel congestion threshold.

[0113] In a case where the first channel congestion parameter information includes the first channel congestion range, the processor selecting the at least one direct link transmission carrier frequency for the first data according to the carrier frequency information and the first channel congestion parameter information in the priority order includes:

[0114] select at least one sidelink transmission carrier for the first data in at least one second carrier in the at least one first carrier corresponding to the first carrier information according to the priority order; wherein the channel congestion value corresponding to the second carrier belongs to the first channel congestion range.

[0115] With reference to the third implementation manner of the fifth aspect, in a fourth implementation manner of the fifth aspect, the processor selects at least one sidelink transmission carrier for the first data in at least one second carrier in the at least one first carrier corresponding to the first carrier information according to the priority order includes: selecting at least one carrier with the smallest channel congestion value from the second carriers as the sidelink transmission carrier.

[0116] With reference to the third implementation manner of the fifth aspect, in a fifth implementation manner of the fifth aspect, the processor selects at least one sidelink transmission carrier for the first data in at least one second carrier in the at least one first carrier corresponding to the first carrier information according to the priority order includes: selecting at least one second carrier with the highest priority order as the sidelink transmission carrier.

[0117] With reference to the third or fourth implementation manner of the fifth aspect, in a sixth implementation manner of the fifth aspect, the channel congestion value corresponding to the second carrier is obtained by the processor measuring or receiving dedicated radio resource control (RRC) signaling or a system information block (SIB) message sent by a base station.

[0118] With reference to the third, fourth or sixth implementation manner of the fifth aspect, in a seventh implementation manner of the fifth aspect, the channel congestion value corresponding to the second carrier is a channel congestion value of a first resource set corresponding to the second carrier.

[0119] With reference to the fifth aspect, in an eighth implementation manner of the fifth aspect, the processor selects at least one sidelink transmission carrier for the first data according to the first carrier information and the first channel congestion parameter information according to the priority order includes: in a case where the first terminal satisfies a first condition, the processor selects at least one sidelink transmission carrier for the first data according to the first carrier information and the first channel congestion parameter information according to the priority order.

[0120] The first condition includes at least one of the following:

[0121] The processor performs resource selection or resource reselection on the carrier corresponding to the at least one first carrier information; or

[0122] The first configuration information changes; or

[0123] The processor receives dedicated RRC signaling sent by the base station; or

[0124] The processor receives SIB messages sent by the base station; or

[0125] The first data allows transmission of the carrier frequency not including the currently selected transmission carrier frequency; or

[0126] The first carrier frequency information corresponds to at least one third carrier frequency, and the priority order of the third carrier frequency is higher than the priority order of at least one carrier frequency in the currently selected transmission carrier frequency; or

[0127] The first carrier frequency information corresponds to at least one third carrier frequency, and the channel congestion value corresponding to the third carrier frequency is less than the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency; or

[0128] The first carrier frequency information corresponds to at least one third carrier frequency, and the channel congestion value corresponding to the third carrier frequency is less than the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency, and the difference between the channel congestion value corresponding to the third carrier frequency and the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is greater than or equal to a first threshold value; or

[0129] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the processor is less than or equal to a second channel congestion threshold; or

[0130] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the processor is within a second channel congestion range; or

[0131] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the processor is greater than or equal to a third channel congestion threshold; or

[0132] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the processor does not belong to a third channel congestion range; or

[0133] The carrier frequency selection or carrier frequency reselection timer is cleared;

[0134] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is the channel congestion value of the second resource set corresponding to the currently selected transmission carrier frequency;

[0135] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is measured by the processor or obtained by receiving dedicated RRC signaling or SIB messages sent by the base station.

[0136] In a sixth aspect, an embodiment of the present application provides a network device, comprising:

[0137] a memory for storing program instructions;

[0138] a processor for invoking instructions in the memory and performing the following operations:

[0139] sending first configuration information to a first terminal, wherein the first configuration information comprises at least one first carrier frequency information and corresponding first channel congestion parameter information, so that the first terminal selects at least one direct link transmission carrier frequency according to the first carrier frequency information and the first channel congestion parameter information in priority order, and sends first data on the direct link transmission carrier frequency.

[0140] With reference to the sixth aspect, in a first implementation manner of the sixth aspect, the memory is further configured to send at least one priority order information corresponding to the at least one first carrier frequency information to the first terminal, so that the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in priority order, and sends the first data on the direct link transmission carrier frequency.

[0141] With reference to the sixth aspect or the first implementation manner of the sixth aspect, in a second implementation manner of the sixth aspect, the memory is further configured to send first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information to the first terminal, so that the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information and the first channel congestion parameter information in priority order, and sends the first data on the direct link transmission carrier frequency; wherein the first identification information comprises at least one of the following: service priority of data, destination address of data, service type of data.

[0142] In a seventh aspect, an embodiment of the present application provides a computer readable storage medium for storing one or more computer programs, the one or more computer programs comprising instructions for performing the multi-carrier selection method provided in the first aspect or the second aspect when the computer program is run on a computer.

[0143] In an eighth aspect, an embodiment of the present application provides a computer program comprising instructions for performing the multi-carrier selection method provided in the first aspect or the second aspect when the computer program is executed on a computer.

[0144] It should be noted that any two or more of the first carrier frequency, the second carrier frequency, and the third carrier frequency can be the same or different, and the present application does not limit this; similarly, any two or more of the first channel congestion threshold, the second channel congestion threshold, and the third channel congestion threshold can be the same or different, and the present application does not limit this; any two or more of the first channel congestion range, the second channel congestion range, and the third channel congestion range can be the same or different, and the present application does not limit this.

[0145] The embodiment of the present application can be implemented by acquiring the first configuration information, selecting at least one direct link transmission carrier frequency according to the first carrier frequency information and the first channel congestion parameter information in the order of priority, and making the first terminal send first data to at least one second terminal on the at least one direct link transmission carrier frequency, so that when the first terminal selects multiple carrier frequencies, the selection is performed in a certain order, so that the transmission carrier frequencies selected by the first terminal converge as much as possible, so that the second terminal receives as much data as possible sent by the first terminal, improves the communication quality in the direct link, and improves the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0146] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows.

[0147] Figures 1-2 A diagram showing the limitation of the transmission carrier frequency selection of the sending end and the receiving chain of the receiving end in the prior art;

[0148] Figure 3 A diagram showing the structure of a communication system provided by the embodiment of the present application;

[0149] Figure 4 A flowchart of a multiple carrier frequency selection method provided by the embodiment of the present application;

[0150] Figure 5 A flowchart of another multiple carrier frequency selection method provided by the embodiment of the present application;

[0151] Figure 6 A flowchart of another multiple carrier frequency selection method provided by the embodiment of the present application;

[0152] Figure 7 A diagram showing a specific scenario provided by the embodiment of the present application;

[0153] Figure 8 A diagram showing a comparison between the first carrier frequency and the first channel congestion threshold and the channel congestion value corresponding thereto provided by the embodiment of the present application;

[0154] Figure 9This is a schematic diagram of the structure of a first terminal provided in an embodiment of this application;

[0155] Figure 10 This is a schematic diagram of another first terminal provided in an embodiment of this application;

[0156] Figure 11 This is a schematic diagram of another first terminal provided in an embodiment of this application;

[0157] Figure 12 This is a schematic diagram of another first terminal provided in an embodiment of this application. Detailed Implementation

[0158] The technical solutions in the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings.

[0159] Please see first. Figure 3 . Figure 3 This is a schematic diagram of a communication system structure provided in an embodiment of this application. Figure 3 As shown, the communication system may include at least a first terminal and at least one second terminal. The first terminal communicates with at least one second terminal via a direct link. When the first terminal is within network coverage, the communication system may also include network equipment. Before sending data to the second terminal, the first terminal selects at least one carrier frequency from the network's configured resources and sends data to the second terminal via the direct link. It can be understood that when the first terminal is outside network coverage, the first terminal can select at least one carrier frequency from the resources pre-configured for it by the network equipment and send data to the second terminal via the direct link.

[0160] It should be noted that the network device involved in the embodiments of the present application can be a base station, or an access point, or can refer to a device in an access network that communicates with a wireless terminal through one or more sectors over an air interface. The embodiments of the present application are described by taking a base station as an example. The base station may, for example, be a base station (BTS) in the Global System of Mobile communication (GSM) or Code Division Multiple Access (CDMA), or a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), or an evolved base station (eNB or eNodeB) in Long Term Evolution (LTE), or a relay station or an access point, or a base station in a future 5G network, and the like, and is not limited herein.

[0161] The first and second terminals involved in this application embodiment can be terminal devices located in a vehicle in V2X (e.g., in-vehicle terminal devices, terminal devices carried by users riding in the vehicle), or terminal devices located on X (X can be a vehicle, infrastructure, network, pedestrian, etc.), or the vehicle terminal itself or X itself. The terminal devices mentioned here can be wireless or wired terminals. A wireless terminal can be a device that provides voice and / or other service data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile device, which exchanges voice and / or data with the radio access network. Examples include Personal Communication Service (PCS) telephones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminals can also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile devices, remote stations, remote terminals, access terminals, user terminals, user agents, and user devices or user equipment; no specific terminology is used here.

[0162] It should be noted that the communication between the first terminal and the second terminal in this embodiment is not limited to V2X communication, but can also be a scenario where communication is conducted via a direct link between devices (D2D), machines (M2M), etc. This embodiment uses V2X communication as an example for illustration.

[0163] Next, combine Figure 3 The communication system described herein includes a multi-carrier frequency selection method provided by an embodiment of this application. For example... Figure 4As shown, the multi-carrier selection method can include at least the following steps:

[0164] S101: The base station sends first configuration information to the first terminal.

[0165] Specifically, the first configuration information can include at least one first carrier information and corresponding first channel congestion parameter information. The first carrier information may, for example but not limited to, be a first carrier identifier. The first channel congestion parameter information may, for example, correspond to the first carrier information, and represent the channel congestion information of the first carrier. The channel busy ratio (CBR) is used to describe the busy degree of a resource set or the load degree of a resource set. For example, the CBR may be the proportion of the number of subchannels whose power exceeds a certain threshold in the resource set to the total number of subchannels within a certain period of time. Or the proportion of the number of resource blocks whose power exceeds a certain threshold in the resource set to the total number of resource blocks within a certain period of time. It should be noted that each first carrier corresponds to at least one resource set, and the channel congestion value of the resource set can represent the channel congestion value corresponding to the first carrier to which the resource set belongs.

[0166] Optionally, the first channel congestion information can include a first channel congestion threshold.

[0167] Optionally, the first channel congestion information can include a first channel congestion range.

[0168] Optionally, the first configuration information can be included in the dedicated radio resource control (RRC) signaling or system information block (SIB) sent by the base station or in the pre-configuration information. Specifically, the pre-configuration information can be information pre-configured in the terminal at the time of factory shipment, or information configured by the network and saved in the terminal.

[0169] S102: The first terminal obtains first data.

[0170] Specifically, the first data is the data to be sent, i.e., the data prepared by the first terminal for sending to at least one second terminal. The first terminal can be understood as a sending terminal, and the second terminal can be understood as a receiving terminal.

[0171] It can be understood that the order in which S101 and S102 occur is not limited here.

[0172] S103: The first terminal selects at least one direct link transmission carrier for the first data according to the first carrier information and the first channel congestion parameter information in priority order.

[0173] Specifically, the priority order is a priority order of the at least one first carrier corresponding to the at least one first carrier frequency information. The priority order can be an arrangement order of the at least one first carrier, or can be a selection order of the at least one first carrier when the first terminal selects a carrier. It can be understood that the priority order is not necessarily an actual priority order, but can also be a priority order in other forms.

[0174] Specifically, the priority order can be a parameter configured by the base station for the first terminal in advance, and the priority order of the at least one first carrier is explicitly indicated. The priority order can also be a priority order of the at least one first carrier determined by the first terminal according to the actual CBR value of each first carrier, that is, the priority order of the at least one first carrier is indirectly determined by the channel congestion value corresponding to each first carrier. In a specific implementation, the first carrier with a smaller channel congestion value can have a higher priority, or among the first carriers with channel congestion values within a certain range, the first carrier with a smaller channel congestion value can have a higher priority.

[0175] In a possible embodiment, when the first channel congestion parameter information includes a first channel congestion threshold, the first terminal can filter at least one second carrier according to the first channel congestion threshold corresponding to each first carrier, and then the first terminal selects at least one direct link transmission carrier for the first data from the at least one second carrier according to the priority order. The channel congestion value corresponding to the second carrier is less than or equal to the first channel congestion threshold.

[0176] In a possible embodiment, when the first channel congestion parameter information includes a first channel congestion range, the first terminal can filter at least one second carrier according to the first channel congestion threshold corresponding to each first carrier, and then the first terminal selects at least one direct link transmission carrier for the first data from the at least one second carrier according to the priority order. The channel congestion value corresponding to the second carrier belongs to the first channel congestion range.

[0177] In a possible embodiment, if the priority order of the at least one first carrier is a parameter configured by the base station for the first terminal in advance, the first terminal can select at least one second carrier with the highest priority from the second carriers as the direct link transmission carrier.

[0178] In a possible embodiment, if the priority order of the at least one first carrier is determined by the first terminal according to the channel congestion value corresponding to each first carrier, the first terminal can select at least one carrier with the smallest channel congestion value from the second carriers as the direct link transmission carrier.

[0179] S104: The first terminal sends first data to the second terminal on the selected sidelink transmission carrier.

[0180] Specifically, after the sidelink transmission carrier is selected, the first terminal sends the first data to at least one second terminal on the sidelink transmission carrier, thereby realizing data communication between terminals.

[0181] It can be understood that the channel congestion value corresponding to the second carrier can be measured by the first terminal, or can be obtained by the first terminal receiving the dedicated RRC signaling or SIB message sent by the base station.

[0182] It can be understood that the channel congestion value corresponding to the second carrier refers to the channel congestion value of the first resource set corresponding to the second carrier. Each second carrier can include at least one first resource set. In one possible embodiment, the first resource set can be a resource pool, and the resource pool includes at least one time-frequency resource. In one possible embodiment, the first resource set corresponding to the second carrier refers to part or all of the time-frequency resources on the second carrier. Specifically, the first resource set can be continuous or discontinuous.

[0183] By implementing the embodiments of the present application, the first terminal can send first data to at least one second terminal on at least one sidelink transmission carrier selected according to the priority order, so that the first terminal selects the transmission carrier in a certain order, so that the transmission carrier selected by the first terminal converges as much as possible, so that the second terminal receives as much data as possible sent by the first terminal.

[0184] The embodiments of the present application also provide another multi-carrier selection method, as shown in Figure 5 The multi-carrier selection method can include the following steps:

[0185] S201: The base station sends first configuration information to the first terminal.

[0186] Specifically, S201 is consistent with S101, and will not be repeated here.

[0187] S202: The first terminal obtains first data.

[0188] Specifically, S202 is consistent with S102, and will not be repeated here.

[0189] S203: The first terminal obtains at least one priority order information corresponding to at least one first carrier information.

[0190] Specifically, the priority order information can be obtained by the first terminal through receiving configuration information or pre-configuration information sent by the base station to the first terminal, and the configuration information or pre-configuration information can explicitly indicate the priority order of the first carrier. The priority order information can also be obtained by the first terminal according to the channel congestion values corresponding to the first carriers, i.e., the priority order of the at least one first carrier is indirectly determined by the channel congestion values corresponding to the first carriers. In a specific implementation, the first carrier with a smaller channel congestion value can have a higher priority, and in the first carriers with channel congestion values within a certain range, the first carrier with a smaller channel congestion value can have a higher priority.

[0191] In a possible embodiment, the priority order can also be implicit. For example, the priority order of the carriers can be represented by carrier ordering, such as {F1, F2, F3}, where the priority of F1 is higher than that of F2, and the priority of F2 is higher than that of F3. Alternatively, the priority of F3 can be higher than that of F2, and the priority of F2 can be higher than that of F1.

[0192] In a possible embodiment, if there are a plurality of carriers in the first carriers, the base station configures the same priority information for the plurality of carriers, and the terminal can further determine the priority of the plurality of carriers according to the channel congestion values corresponding to the plurality of carriers, where the carrier with a smaller channel congestion value has a higher priority, or the terminal can randomly select at least one carrier from the plurality of carriers with the same priority. For example, {F1, F2, F3}, the base station configures the priority of F1 as 1, and the priorities of F2 and F3 as 2. If the channel congestion value of F3 is smaller than that of F2 at this time, if the terminal selects two carriers, the terminal selects {F1, F3}; or for the carriers with the same priority, the terminal randomly selects a carrier therefrom, and at this time, the result can be {F1, F2} or {F1, F3}.

[0193] Specifically, the sequence of S203, S201, and S202 is not limited here.

[0194] It should be noted that in a possible embodiment, the at least one priority order information corresponding to the at least one first carrier information can be included in the first configuration information, and at this time, the terminal can also obtain the at least one priority order information corresponding to the at least one first carrier information by receiving the first configuration information, and at this time, step S201 and step S203 can be combined. Of course, it can be understood that the at least one priority order information corresponding to the at least one first carrier information can not be included in the first configuration information.

[0195] Optionally, the at least one priority order information corresponding to the at least one first carrier frequency information can be contained in the dedicated RRC signaling or SIB sent by the base station or in preconfigured information. Specifically, the preconfigured information can be information preconfigured in the terminal at the time of factory shipment, or information configured by the network and saved in the terminal.

[0196] S204: The first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information, the first channel congestion parameter information and the priority order information.

[0197] Specifically, after determining the priority order information corresponding to each first carrier frequency information, the priority order of each first carrier frequency represented by the priority order information is combined with the first carrier frequency information and the first channel congestion parameter information to select at least one direct link transmission carrier frequency for the first data.

[0198] S205: The first terminal sends the first data to the second terminal on the direct link transmission carrier frequency.

[0199] Specifically, S205 is consistent with S104, and will not be repeated here.

[0200] The embodiments of the present application provide various ways for the first terminal to obtain the priority order information of each first carrier frequency. The first terminal can select a transmission carrier frequency for the first data according to the priority order information of each first carrier frequency, so that the first terminal selects the transmission carrier frequency in a certain order when performing multi-carrier selection, and the transmission carrier frequency selected by the first terminal converges as much as possible, so that the second terminal receives as much data as possible sent by the first terminal.

[0201] The embodiments of the present application provide another multi-carrier selection method, as shown in Figure 6 The multi-carrier selection method can include the following steps:

[0202] S301: The base station sends first configuration information to the first terminal.

[0203] Specifically, S301 is consistent with S201, and will not be repeated here.

[0204] S302: The first terminal obtains first data.

[0205] Specifically, S302 is consistent with S202, and will not be repeated here.

[0206] S303: The first terminal obtains at least one priority order information corresponding to at least one first carrier frequency information.

[0207] Specifically, S303 is consistent with S203, and will not be repeated here.

[0208] S304: The first terminal acquires first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information.

[0209] Specifically, the first identification information includes, but is not limited to, at least one of the following: a service priority of the data, a destination address of the data, and a service type of the data.

[0210] The first terminal can exist in multiple different types of services. The service type of the data can be a service corresponding to different receiving ends, for example, the different types of services mentioned above can be V2V services, V2P services, V2I services, etc. Alternatively, the service type of the data can also be distinguished by an application layer identifier carried by the application layer, such as ITS-AID: ITS Application Identifier or PSID: Provider Service Identifier. For example, different application layer identifiers can refer to different services. For example, ITS-AID1 can represent a collision warning service, and ITS-AID2 can represent a vehicle state abnormality warning.

[0211] The data sent by the first terminal to the second terminal can have different service priorities. Different service priority data can use different transmission parameters in the access layer to be treated differently. For example, the access layer can configure more resources for data with higher priority, or allow it to use a lower modulation and coding strategy to ensure the reliability of data transmission.

[0212] The data sent by the first terminal to the second terminal can have different destination addresses. Different destination addresses can point to different second terminals. For example, the destination address can be a multicast address, a unicast address, or a broadcast address.

[0213] In one possible implementation form, the destination address of the data can have a mapping relationship with the service type of the data.

[0214] Optionally, the first carrier frequency corresponding to the first carrier frequency information can be determined according to the first carrier frequency information, and the first identification information corresponding to the first carrier frequency is further determined.

[0215] Optionally, the first carrier frequency corresponding to the first channel congestion parameter information can be determined according to the first channel congestion parameter information, and the first identification information corresponding to the first carrier frequency is further determined.

[0216] Optionally, the first carrier frequency corresponding to the first carrier frequency information and the first channel congestion parameter information can be determined according to the first carrier frequency information and the first channel congestion parameter information, and the first identification information corresponding to the first carrier frequency is further determined.

[0217] Specifically, for different first carrier frequencies, different first identification information can be corresponded, i.e. different service priorities of data, destination addresses of data, service types of data, etc. After the first terminal acquires the first data, the second identification information of the first data can be further determined according to the first data, which includes but is not limited to at least one of the following: service type of the first data, destination address of the first data, service type of the first data, etc. The first terminal can obtain a plurality of first carrier frequencies matched with the second identification information of the first data according to the second identification information of the first data, and the first identification information of these first carrier frequencies can include the second identification information of the first data. The second identification information can be the same as or different from the first identification information, which is not limited in the present application.

[0218] In one possible embodiment, the first terminal can also determine the second identification information of the first data according to the second identification information of the first data corresponding to the first data acquired at the same time when acquiring the first data. For example, the second identification information can be delivered through a primitive.

[0219] S305: The first terminal selects at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information and the first channel congestion parameter information in priority order.

[0220] Specifically, first, a plurality of first carrier frequencies matched with the second identification information of the first data are screened according to the first identification information. Secondly, at least one direct link transmission carrier frequency for the first data is selected from the plurality of first carrier frequencies in priority order according to the first carrier frequency information and the first channel congestion parameter information.

[0221] The priority order of the plurality of first carrier frequencies can refer to the description of the priority order of the first carrier frequency in the foregoing embodiments, which will not be repeated here.

[0222] S306: The first terminal sends the first data to the second terminal on the direct link transmission carrier frequency.

[0223] Specifically, S306 is consistent with S205, which will not be repeated here.

[0224] Specifically, the order of occurrence of S301, S302, S303 and S304 is not limited here.

[0225] It should be noted that in a possible embodiment, the first identification information corresponding to the first channel congestion parameter information can be included in the first configuration information, and at this time, the terminal can obtain the first identification information corresponding to the first channel congestion parameter information by receiving the first configuration information, and at this time, step S301 and step S304 can be combined. Of course, it can be understood that the first identification information corresponding to the first channel congestion parameter information can not be included in the first configuration information.

[0226] It should be noted that in a possible embodiment, the first identification information corresponding to the first channel congestion parameter information and the at least one priority order information corresponding to the at least one first carrier frequency information are included in the same information, for example, the second configuration information, and at this time, the terminal can obtain the first identification information corresponding to the first channel congestion parameter information and the at least one priority order information corresponding to the at least one first carrier frequency information by receiving the second configuration information, and at this time, step S303 and step S304 can be combined. Of course, it can be understood that the first identification information corresponding to the first channel congestion parameter information can not be included in the same information as the at least one priority order information corresponding to the at least one first carrier frequency information.

[0227] Optionally, the first identification information corresponding to the first channel congestion parameter information can be included in the dedicated RRC signaling or SIB sent by the base station or included in the pre-configuration information. Specifically, the pre-configuration information can be information pre-configured in the terminal at the time of factory, or information configured by the network and saved in the terminal.

[0228] The embodiment of the present application can preliminarily screen the first carrier frequency matching the first data through the first identification information of the first carrier frequency, and further select the direct link transmission carrier frequency according to the first carrier frequency information and the first channel congestion parameter information in the screened first carrier frequency according to the priority order, so that the transmission carrier frequency selected by the first terminal converges as much as possible, so that the second terminal receives as much data as possible transmitted by the first terminal.

[0229] In a specific embodiment, it is assumed that the first carrier frequency configured by the base station for the first terminal includes F1, F2, F3, F4, F5, F6, F7, F8, F9, etc. Among them, the data service priority corresponding to F1, F2, F3 is 1, the data service priority corresponding to F4, F5, F6 is 2, and the data service priority corresponding to F7, F8, F9 is 3, as shown in FIG. 1. Figure 7 At this time, the service priority of the first data obtained by the first terminal is 2, and then the first carrier frequency preliminarily screened by the first terminal includes F4, F5, F6. Further, the first terminal can select at least one direct link transmission carrier frequency from F4, F5, F6. The specific selection process is as follows:

[0230] Assume that the first channel congestion parameter information includes the first channel congestion threshold.

[0231] like Figure 8 As shown, if the first channel congestion threshold corresponding to F4 is 50%, the channel congestion value is 30%; if the first channel congestion threshold corresponding to F5 is 60%, the channel congestion value is 61%; and if the first channel congestion threshold corresponding to F6 is 40%, the channel congestion value is 35%.

[0232] Next, a second carrier frequency is selected from the first carrier frequency. Since the channel congestion value of 61% corresponding to F5 is higher than its first channel congestion threshold of 60%, F5 is not a second carrier frequency. Therefore, the second carrier frequency can include F6 and F4. Assuming that the priority order is determined by the channel congestion value corresponding to each first carrier frequency, the priority order from high to low is F6 and F4. The first terminal can select the direct link transmission carrier frequency from F6 and F4 in sequence, and send the first data to at least one second terminal on the finally selected direct link transmission carrier frequency. If the first terminal needs to select one direct link transmission carrier frequency to transmit the first data, the direct link transmission carrier frequency is F6; if the first terminal needs to select two direct link transmission carrier frequencies to transmit the first data, the direct link transmission carrier frequencies are F6 and F4.

[0233] In one possible embodiment, S103 in the above embodiment can be executed only when the first terminal meets the first condition. That is, when the first terminal meets the first condition, the first terminal selects at least one direct link transmission carrier frequency for the first data according to the priority order of the first carrier frequency information and the first channel congestion parameter information.

[0234] Optionally, the first condition includes the first terminal performing resource selection or resource reselection on the carrier frequency corresponding to at least one of the aforementioned first carrier frequency information. In one possible implementation, the carrier frequency corresponding to at least one of the currently selected transmission carrier frequencies can be at least one of the currently selected transmission carrier frequencies. In the V2X protocol Release 14 defined by the 3rd Generation Mobile Buddy Program, the first terminal can use a listener reservation mechanism to select resources from the resource set corresponding to the current transmission carrier frequency, reserving resources for several subsequent transmissions each time resource selection or reselection is performed. Therefore, when the first terminal performs resource selection or reselection, it indicates that the previous several transmissions have ended, and the terminal can then perform carrier frequency selection or reselection. However, performing carrier frequency reselection in every transmission would incur too much overhead.

[0235] Optionally, the first condition includes a change in the aforementioned first configuration information.

[0236] Specifically, if the channel congestion parameter information of a currently used carrier frequency changes, resulting in that the channel congestion value of the carrier frequency is greater than the first channel congestion threshold or does not belong to the first channel congestion range, the carrier frequency selection needs to be re-performed.

[0237] Optionally, the first condition comprises that the first terminal receives the dedicated RRC signaling sent by the base station.

[0238] For example, the dedicated RRC signaling sent by the base station to the first terminal can be resource reconfiguration signaling, and at this time, the first carrier frequency information and / or the first channel congestion parameter information contained in the first configuration information can have changed, or other carrier frequency selection related parameter information can have changed. It can be understood that the first configuration information from nothing to something can also be understood as having changed.

[0239] Optionally, the first condition comprises that the first terminal receives the SIB message sent by the base station.

[0240] For example, the SIB message sent by the base station to the first terminal, and the first carrier frequency information and / or the first channel congestion parameter information contained in the first configuration information in the SIB message can have changed, or other carrier frequency selection related parameter information can have changed. It can be understood that the first configuration information from nothing to something can also be understood as having changed.

[0241] Optionally, the first condition comprises that the first data allowed to be transmitted does not include the currently selected transmission carrier frequency.

[0242] For example, according to the spectrum regulation requirements of different regions, different data can need to be transmitted on different carrier frequencies. If a first data newly acquired by the terminal, if the currently selected transmission carrier frequency does not contain the carrier frequency allowed to transmit the first data, at this time, at least one carrier frequency needs to be selected in the allowed carrier frequency range for the first data. It can be understood that the currently selected transmission carrier frequency at the first transmission can be regarded as an empty set.

[0243] Optionally, the first condition comprises that the first carrier frequency information corresponds to at least one third carrier frequency, and the priority order of the third carrier frequency is higher than the priority order of at least one carrier frequency in the currently selected transmission carrier frequency.

[0244] For example, when there is at least one third carrier frequency in the first carrier frequency, and the priority order of the third carrier frequency is higher than the priority order of at least one carrier frequency in the currently selected transmission carrier frequency, i.e. the condition of resource reselection is met, the first terminal can select the third carrier frequency with higher priority order as the direct link transmission carrier frequency.

[0245] It can be known that, in order to avoid frequent carrier selection or carrier reselection, the first terminal can be set to not randomly perform carrier selection or carrier reselection within a period of time. Specifically, within a period of time, if the channel congestion value of the currently selected carrier meets the condition, even if there is a third carrier with higher priority, carrier selection or carrier reselection does not need to be performed. Only after a period of time, when there is a third carrier with higher priority, carrier selection or carrier reselection can be performed, and the third carrier with higher priority is taken as the direct link transmission carrier.

[0246] Optionally, the first condition includes that there is at least one third carrier in the carriers corresponding to the first carrier information, and the channel congestion value corresponding to the third carrier is less than the channel congestion value corresponding to at least one of the currently selected transmission carriers.

[0247] For example, if the priority order is determined by the channel congestion values corresponding to the first carriers, when there is at least one third carrier in the first carriers, and the channel congestion value of the third carrier is less than the channel congestion value corresponding to at least one of the currently selected transmission carriers, i.e., the condition of carrier selection or carrier reselection is met, the first terminal can select the third carrier with higher priority as the direct link transmission carrier.

[0248] It can be known that, in order to avoid frequent carrier selection or carrier reselection, the first terminal can be set to not randomly perform carrier selection or carrier reselection within a period of time. Specifically, the specific setting can refer to the related description in the above embodiment of taking the third carrier with higher priority as the transmission carrier, and will not be repeated here.

[0249] Further, the first condition includes that there is at least one third carrier in the carriers corresponding to the first carrier information, the channel congestion value corresponding to the third carrier is less than the channel congestion value corresponding to at least one of the currently selected transmission carriers, and the difference between the channel congestion value corresponding to the third carrier and the channel congestion value corresponding to at least one of the currently selected transmission carriers is greater than or equal to the first threshold value.

[0250] It can be known that, in order to avoid frequent carrier selection or carrier reselection, in the case that the channel congestion value corresponding to the third carrier is less than the channel congestion value corresponding to at least one of the currently selected transmission carriers, the difference between the channel congestion value corresponding to the third carrier and the channel congestion value corresponding to at least one of the currently selected transmission carriers is greater than or equal to the first threshold value. The difference between the channel congestion value corresponding to the third carrier and the channel congestion value corresponding to at least one of the currently selected transmission carriers can also be defined as the absolute value of the difference between the channel congestion value corresponding to the third carrier and the channel congestion value corresponding to at least one of the currently selected transmission carriers. For example, the first threshold value can be 0.1, that is, the difference between the channel congestion value corresponding to at least one of the currently selected transmission carriers and the channel congestion value corresponding to the third carrier needs to be greater than or equal to 0.1. By setting the first threshold value, it can be ensured that the channel congestion value corresponding to the third carrier to be reselected is better than the currently selected transmission carrier to be replaced to a certain extent, thereby ensuring that the communication quality is improved to a first degree.

[0251] Optionally, the first condition comprises that the channel congestion value corresponding to at least one of the currently selected transmission carriers of the first terminal is less than or equal to a second channel congestion threshold.

[0252] For example, when the channel congestion value corresponding to at least one of the currently selected transmission carriers of the first terminal is less than or equal to the second channel congestion threshold, the condition for carrier selection or carrier reselection is met, and the first terminal can directly select at least one direct link transmission carrier from the first carrier. In a possible embodiment, the second channel threshold can be a very small value. When the channel congestion value corresponding to at least one of the currently selected transmission carriers of the first terminal is less than or equal to the second channel congestion threshold, the utilization of the transmission carrier is not high, and the base station can completely schedule the first terminal on another carrier, thereby reducing the number of transmission chains or utilizing the transmission carrier for other services. The present application does not exclude other purposes of carrier selection or carrier reselection.

[0253] Optionally, the first condition comprises that the channel congestion value corresponding to at least one of the currently selected transmission carriers of the first terminal is within a second channel congestion range.

[0254] Specifically, when the channel congestion value corresponding to at least one of the currently selected transmission carriers of the first terminal is within the second channel congestion range, the condition for carrier selection or carrier reselection is met, and the first terminal can directly select at least one direct link transmission carrier from the first carrier.

[0255] For example, the second channel congestion range can be a relatively large value. When the channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the first terminal is within the second channel congestion range, it indicates that the degree of congestion of the currently selected transmission carrier frequency is large, which can affect the communication quality. Therefore, the condition for carrier selection or carrier reselection is met, and the first terminal can directly select at least one direct link transmission carrier frequency from the first carrier frequency.

[0256] Alternatively, for example, the second channel congestion range can be a relatively small value. When the channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the first terminal is within the second channel congestion range, it indicates that the utilization of the transmission carrier frequency is not high, and the base station can completely schedule the first terminal on another carrier frequency, thereby reducing the number of transmission chains or utilizing the transmission carrier frequency for other services. Therefore, the condition for carrier selection or carrier reselection is met, and the first terminal can directly select at least one direct link transmission carrier frequency from the first carrier frequency. The present application does not exclude other purposes of carrier selection or carrier reselection.

[0257] Optionally, the first condition includes that the channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the first terminal is greater than or equal to a third channel congestion threshold.

[0258] Specifically, when the channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the first terminal is greater than or equal to the third channel congestion threshold, it indicates that the degree of congestion of the currently selected transmission carrier frequency is large, which can affect the communication quality. Therefore, the condition for carrier selection or carrier reselection is met, and the first terminal can directly select at least one direct link transmission carrier frequency from the first carrier frequency. It can be understood that the third channel congestion threshold can be greater than the first channel congestion threshold.

[0259] Optionally, the first condition includes that the channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the first terminal does not belong to a third channel congestion range.

[0260] Specifically, when the channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the first terminal does not belong to the third channel congestion range, the condition for carrier selection or reselection is met, and the first terminal can directly select at least one direct link transmission carrier frequency from the first carrier frequency. It can be understood that the size of the third channel congestion range can include the entire first channel congestion range, that is, the first channel congestion range is within the third channel congestion range.

[0261] Optionally, the first condition includes that a carrier selection or carrier reselection timer is cleared.

[0262] Specifically, in order to limit the frequency of carrier selection or carrier reselection, a timer can be configured for the first terminal. When initiating carrier selection or carrier reselection, the timer starts from a set value T1 and decreases. When the timer decreases to zero, carrier selection or carrier reselection is initiated.

[0263] Optionally, T1 can be included in the dedicated RRC signaling or SIB sent by the base station or in the preconfigured information. Specifically, the preconfigured information can be information preconfigured in the terminal at the time of factory shipment, or information configured by the network and saved in the terminal.

[0264] It can be understood that the channel congestion value corresponding to the currently selected transmission carrier includes the channel congestion value of the second resource set corresponding to the currently selected transmission carrier. In one possible embodiment, the second resource set can be a resource pool, and the resource pool includes at least one time-frequency resource. In one possible embodiment, the second resource set corresponding to the at least one currently selected transmission carrier refers to part or all of the time-frequency resources on the at least one currently selected transmission carrier. Specifically, the second resource set can be continuous or discontinuous. The second resource set can be the same as or different from the first resource set.

[0265] It can be understood that the channel congestion value corresponding to the currently selected transmission carrier can be measured by the first terminal, or can be obtained by the first terminal receiving the dedicated RRC signaling or SIB message sent by the base station.

[0266] The embodiments of the present application provide a variety of trigger conditions for carrier selection and carrier reselection. Carrier selection and carrier reselection can be performed only when the first condition is met, avoiding the terminal from randomly performing carrier selection and carrier reselection. In the case of ensuring that the transmission carrier selected by the terminal converges as much as possible and the receiving end can receive more data as much as possible, the complexity of the receiving end is taken into account, and the communication quality is further improved.

[0267] The foregoing detailed description of the method of the embodiments of the present application. In order to better implement the above-mentioned scheme of the embodiments of the present application, correspondingly, the related device for cooperating with the implementation of the above-mentioned scheme is also provided below.

[0268] As Figure 9 The first terminal provided by the embodiments of the present application provides a structure diagram of the first terminal. The first terminal 40 can include a first acquisition module 401, a second acquisition module 402, a selection module 404, and a sending module 403, wherein

[0269] The first acquisition module 401 is configured to acquire first configuration information. The first configuration information includes at least one first carrier information and corresponding first channel congestion parameter information.

[0270] The second obtaining module 402 is configured to obtain first data.

[0271] The selection module 404 is configured to select at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in a priority order.

[0272] The sending module 403 is configured to send the first data on the direct link transmission carrier frequency.

[0273] In one possible implementation, the first terminal 40 further includes a third obtaining module 405, as shown in Figure 10

[0274] The third obtaining module 405 is configured to obtain at least one priority order information corresponding to the at least one first carrier frequency information.

[0275] The selection module 404 is configured to select at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order information.

[0276] In one possible implementation, the first terminal 40 further includes a fourth obtaining module 406, as shown in Figure 11

[0277] The fourth obtaining module 406 is configured to obtain first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information.

[0278] The selection module 404 is configured to select at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information and the first channel congestion parameter information in a priority order; wherein the first identification information includes at least one of the following: service priority of data, destination address of data, service type of data.

[0279] In one possible implementation, the first channel congestion parameter information includes a first channel congestion threshold or a first channel congestion range.

[0280] In the case where the first channel congestion parameter information includes a first channel congestion threshold, the selection module 404 is configured to select at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one first carrier frequency corresponding to the at least one first carrier frequency information in a priority order; wherein the channel congestion value corresponding to the second carrier frequency is less than or equal to the first channel congestion threshold.

[0281] ​​In a possible implementation, the selection module 404 is configured to select at least one of the second carrier frequencies with the smallest channel congestion value as the direct link transmission carrier frequency.

[0282] In a possible implementation, the selection module 404 is configured to select at least one of the second carrier frequencies with the smallest channel congestion value as the direct link transmission carrier frequency.

[0283] In a possible implementation, the selection module 404 is configured to select at least one of the second carrier frequencies with the smallest channel congestion value as the direct link transmission carrier frequency.

[0284] In a possible implementation, the channel congestion value corresponding to the second carrier frequency is measured by the first terminal 40 or obtained through dedicated radio resource control (RRC) signaling or a system information block (SIB) message sent by the base station.

[0285] In a possible implementation, the channel congestion value corresponding to the second carrier frequency is measured by the first terminal 40 or obtained through dedicated radio resource control (RRC) signaling or a system information block (SIB) message sent by the base station.

[0286] In a possible implementation, the selection module 404 is configured to, in a case where the first terminal 40 meets a first condition, select at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in a priority order.

[0287] The first condition includes at least one of the following:

[0288] The first terminal 40 performs resource selection or resource reselection on the carrier corresponding to the at least one first carrier frequency information; or

[0289] The first configuration information changes; or

[0290] The first terminal 40 receives dedicated RRC signaling sent by the base station; or

[0291] The first terminal 40 receives SIB messages sent by the base station; or

[0292] The carrier frequency allowed to transmit the first data does not include the currently selected transmission carrier frequency; or

[0293] There is at least one third carrier frequency in the carrier frequency corresponding to the first carrier frequency information, and the priority order of the third carrier frequency is higher than that of at least one of the currently selected transmission carrier frequencies; or

[0294] The first carrier frequency information corresponds to at least one third carrier frequency, and a channel congestion value corresponding to the third carrier frequency is less than a channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency; or

[0295] The first carrier frequency information corresponds to at least one third carrier frequency, and a channel congestion value corresponding to the third carrier frequency is less than a channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency, and a difference between the channel congestion value corresponding to the third carrier frequency and the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is greater than or equal to a first threshold value; or

[0296] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the first terminal 40 is less than or equal to a second channel congestion threshold; or

[0297] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the first terminal 40 is within a second channel congestion range; or

[0298] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the first terminal 40 is greater than or equal to a third channel congestion threshold; or

[0299] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency of the first terminal 40 does not belong to a third channel congestion range; or

[0300] The carrier frequency selection or carrier frequency reselection timer is cleared.

[0301] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is a channel congestion value of a second resource set corresponding to the currently selected transmission carrier frequency.

[0302] The channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is measured by the first terminal 40 or obtained through receiving a dedicated RRC signaling or SIB message sent by a base station.

[0303] It can be understood that the functions of the functional modules of the first terminal 40 in the embodiment can be implemented according to the methods in the method embodiments, which will not be described here.

[0304] The embodiment of the present application can acquire the first configuration information, select at least one direct link transmission carrier frequency according to the first carrier frequency information and the first channel congestion parameter information in the priority order, and make the first terminal send the first data to at least one second terminal on the at least one direct link transmission carrier frequency, so that the first terminal selects the transmission carrier frequency in a certain order when performing the multi-carrier selection, and the transmission carrier frequency selected by the first terminal converges as much as possible, so that the second terminal receives as much data sent by the first terminal as possible.

[0305] The embodiment of the present application also provides a network device, which can comprise: a first sending module, configured to send first configuration information to a first terminal, wherein the first configuration information comprises at least one first carrier frequency information and corresponding first channel congestion parameter information, so that the first terminal selects at least one direct link transmission carrier frequency according to the first carrier frequency information and the first channel congestion parameter information in the priority order, and sends first data on the direct link transmission carrier frequency.

[0306] In a possible embodiment, the network device further comprises: a second sending module, configured to send at least one priority order information corresponding to the at least one first carrier frequency information to the first terminal, so that the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order, and sends the first data on the direct link transmission carrier frequency.

[0307] In a possible embodiment, the network device further comprises: a third sending module, configured to send first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information to the first terminal, so that the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information and the first channel congestion parameter information in the priority order, and sends the first data on the direct link transmission carrier frequency; wherein the first identification information comprises at least one of the following: service priority of data, destination address of data, and service type of data.

[0308] Please refer to Figure 12 , Figure 12 Another structural schematic diagram of a first terminal provided by the embodiment of the present application is provided. As shown in Figure 12 the first terminal 50 can at least comprise a processor 501, a memory 502 and a transceiver 503, which are connected with each other through a bus 504.

[0309] The memory 502 includes, but is not limited to, a Random Access Memory (RAM), a Read-Only Memory (ROM), or an Erasable Programmable Read-Only Memory (EPROM or Flash memory), which is used for storing relevant instructions and data.

[0310] The transceiver 503 can include a receiver and a transmitter, for example, a wireless radio frequency module. The processor 501 described below receives or transmits a message, which can be understood as the processor 501 receiving or transmitting through the transceiver.

[0311] The processor 501 can be one or more Central Processing Units (CPUs). In the case of the processor 501 being a CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0312] The processor 501 in the first terminal 50 is configured to read program codes stored in the memory 502 and perform the following operations.

[0313] Obtain first configuration information, wherein the first configuration information includes at least one first carrier frequency information and corresponding first channel congestion parameter information; obtain first data; select at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in priority order; and transmit the first data on the direct link transmission carrier frequency.

[0314] In one possible embodiment, the processor 501 is further configured to obtain at least one priority order information corresponding to the at least one first carrier frequency information.

[0315] The processor 501 selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in priority order includes that the processor 501 selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information, the first channel congestion parameter information, and the priority order information.

[0316] In one possible embodiment, the processor 501 is further configured to obtain first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information.

[0317] The processor 501 selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order comprises: selecting at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information and the first channel congestion parameter information in the priority order; wherein the first identification information comprises at least one of the following: service priority of data, destination address of data, service type of data.

[0318] In one possible embodiment, the first channel congestion parameter information comprises a first channel congestion threshold or a first channel congestion range.

[0319] In the case where the first channel congestion parameter information comprises a first channel congestion threshold, the processor 501 selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order comprises: selecting at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one first carrier frequency corresponding to the first carrier frequency information in the priority order; wherein the channel congestion value corresponding to the second carrier frequency is less than or equal to the first channel congestion threshold.

[0320] In the case where the first channel congestion parameter information comprises a first channel congestion range, the processor 501 selects at least one direct link transmission carrier frequency for the first data according to the carrier frequency information and the first channel congestion parameter information in the priority order comprises: selecting at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one first carrier frequency corresponding to the first carrier frequency information in the priority order; wherein the channel congestion value corresponding to the second carrier frequency belongs to the first channel congestion range.

[0321] In one possible embodiment, the processor 501 selects at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one first carrier frequency corresponding to the first carrier frequency information in the priority order comprises: selecting at least one carrier frequency with the smallest channel congestion value from the second carrier frequency as the direct link transmission carrier frequency.

[0322] In one possible embodiment, the processor 501 selects at least one direct link transmission carrier frequency for the first data in at least one second carrier frequency in at least one first carrier frequency corresponding to the first carrier frequency information in the priority order comprises: selecting at least one second carrier frequency with the highest priority order as the direct link transmission carrier frequency.

[0323] In a possible implementation, the channel congestion value corresponding to the second carrier frequency is measured by the processor 501 or obtained through dedicated radio resource control (RRC) signaling or a system information block (SIB) message sent by the base station.

[0324] In a possible implementation, the channel congestion value corresponding to the second carrier frequency is a channel congestion value of a first resource set corresponding to the second carrier frequency.

[0325] In a possible implementation, the processor 501 selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order includes that, in a case where the first terminal 50 meets a first condition, the processor 501 selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in the priority order.

[0326] The first condition includes at least one of the following:

[0327] The processor 501 performs resource selection or resource reselection on the carrier frequency corresponding to the at least one first carrier frequency information; or

[0328] The first configuration information changes; or

[0329] The processor 501 receives dedicated RRC signaling sent by the base station; or

[0330] The processor 501 receives a SIB message sent by the base station; or

[0331] The carrier frequencies allowed to transmit the first data do not include the currently selected transmission carrier frequency; or

[0332] There is at least one third carrier frequency in the carrier frequencies corresponding to the first carrier frequency information, and the priority order of the third carrier frequency is higher than the priority order of at least one carrier frequency in the currently selected transmission carrier frequency; or

[0333] There is at least one third carrier frequency in the carrier frequencies corresponding to the first carrier frequency information, and a channel congestion value corresponding to the third carrier frequency is smaller than a channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency; or

[0334] There is at least one third carrier frequency in the carrier frequencies corresponding to the first carrier frequency information, a channel congestion value corresponding to the third carrier frequency is smaller than a channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency, and a difference value between the channel congestion value corresponding to the third carrier frequency and the channel congestion value corresponding to at least one carrier frequency in the currently selected transmission carrier frequency is greater than or equal to a first threshold value; or

[0335] The channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the processor 501 is less than or equal to a second channel congestion threshold; or

[0336] The channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the processor 501 is within a second channel congestion range; or

[0337] The channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the processor 501 is greater than or equal to a third channel congestion threshold; or

[0338] The channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the processor 501 is not within a third channel congestion range; or

[0339] The carrier frequency selection or carrier frequency reselection timer is cleared.

[0340] The channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the processor 501 is the channel congestion value of the second resource set corresponding to the transmission carrier frequencies currently selected by the processor 501.

[0341] The channel congestion value corresponding to at least one of the transmission carrier frequencies currently selected by the processor 501 is measured by the processor 501 or obtained through receiving dedicated RRC signaling or SIB messages sent by a base station.

[0342] It should be noted that the specific implementation of each operation can also be based on the method specific implementation in the above method embodiment, which will not be repeated here.

[0343] The implementation of the present application embodiment can select at least one direct link transmission carrier frequency according to the first carrier frequency information and the first channel congestion parameter information in the priority order by obtaining the first configuration information, so that the first terminal transmits first data to at least one second terminal on the at least one direct link transmission carrier frequency. When the first terminal performs multi-carrier selection, the selection is performed in a certain order, so that the transmission carrier frequency selected by the first terminal converges as much as possible, so that the second terminal receives as much data as possible transmitted by the first terminal.

[0344] The present application embodiment also provides another network device, which can at least include a processor, a memory and a transceiver, which are connected to each other through a bus.

[0345] The memory includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), or an erasable programmable read-only memory (EPROM or a flash memory), which is used for relevant instructions and data.

[0346] The transceiver can include a receiver and a transmitter, for example, a wireless radio frequency module. The processor 501 described below receives or transmits a message, which can be understood as being received or transmitted by the processor through the transceiver.

[0347] The processor can be one or more central processing units (CPUs). In the case of a CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0348] The processor in the network device is configured to read program code stored in the memory and perform the following operations: sending first configuration information to a first terminal, wherein the first configuration information includes at least one first carrier frequency information and corresponding first channel congestion parameter information, so that the first terminal selects at least one direct link transmission carrier frequency according to the first carrier frequency information and the first channel congestion parameter information in priority order, and sends first data on the direct link transmission carrier frequency.

[0349] In one possible embodiment, the memory is further configured to: send at least one priority order information corresponding to the at least one first carrier frequency information to the first terminal, so that the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in priority order, and sends the first data on the direct link transmission carrier frequency.

[0350] In one possible embodiment, the memory is further configured to: send first identification information corresponding to the first carrier frequency information and / or the first channel congestion parameter information to the first terminal, so that the first terminal selects at least one direct link transmission carrier frequency for the first data according to the first identification information, the first carrier frequency information, and the first channel congestion parameter information in priority order, and sends the first data on the direct link transmission carrier frequency; wherein the first identification information includes at least one of the following: service priority of data, destination address of data, and service type of data.

[0351] In another embodiment of the present application, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program. The computer program includes program instructions, and the program instructions are executed by a processor to implement the following steps: obtaining first configuration information, wherein the first configuration information includes at least one first carrier frequency information and corresponding first channel congestion parameter information; obtaining first data; selecting at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in a priority order; and transmitting the first data on the direct link transmission carrier frequency.

[0352] The computer readable storage medium can be an internal storage unit of the random access device in the foregoing embodiments, for example, a hard disk or a memory of the random access device. The computer readable storage medium can also be an external storage device of the random access device, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, or the like. Further, the computer readable storage medium can include both the internal storage unit and the external storage device of the random access device. The computer readable storage medium is used to store the computer program and other programs and data required by the random access device. The computer readable storage medium can also be used to temporarily store data that has been output or will be output.

[0353] The computer program includes instructions, and when the computer program is executed on a computer, the instructions are used to perform the following operations: obtaining first configuration information, wherein the first configuration information includes at least one first carrier frequency information and corresponding first channel congestion parameter information; obtaining first data; selecting at least one direct link transmission carrier frequency for the first data according to the first carrier frequency information and the first channel congestion parameter information in a priority order; and transmitting the first data on the direct link transmission carrier frequency.

[0354] Those skilled in the art can understand that all or part of the foregoing embodiment methods can be implemented by a computer program to instruct relevant hardware to complete, and the program can be stored in a computer readable storage medium, and the program can include the foregoing method embodiments when executed.

[0355] Although the application has been described in connection with various embodiments, it will be understood that the application is capable of further modifications. This application is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended to cover and embrace all adaptations or modifications of the application. The disclosure of elements of the application in the specification and drawings is not intended to limit the scope of the application to the specific embodiments illustrated. The words "including" and "comprising" are not used thereto in a restrictive sense, and the use of the term "consisting" is not intended to limit the application to the specific embodiments disclosed.

Claims

1. A multi-carrier selection method, characterized by, The method comprises: determining first configuration information; sending the first configuration information to a first terminal; wherein the first configuration information comprises at least one first carrier frequency information and corresponding first channel congestion parameter information, the first carrier frequency information indicating an identity of a first carrier frequency, and the first channel congestion parameter information corresponding to the first carrier frequency information comprising a first channel congestion threshold of the first carrier frequency; the first configuration information is used by the first terminal to: filter at least one second carrier frequency from the at least one first carrier frequency, a channel congestion value corresponding to each second carrier frequency being less than or equal to the first channel congestion threshold corresponding to the each second carrier frequency; select at least one direct link transmission carrier frequency from the at least one second carrier frequency according to a priority order of the at least one second carrier frequency; the priority of a carrier frequency with a smaller channel congestion value in the at least one second carrier frequency is higher, or the priority of the at least one second carrier frequency is pre-configured by a network device; and send first data on the direct link transmission carrier frequency.

2. The method of claim 1, wherein: the first configuration information is included in sent dedicated radio resource control (RRC) signaling or a system broadcast block (SIB) message.

3. The method of claim 1, wherein, The method further comprises: sending dedicated radio resource control (RRC) signaling or a system broadcast block (SIB) message to the first terminal, the RRC signaling or the SIB message being used by the first terminal to determine the channel congestion value corresponding to the second carrier frequency.

4. The method of claim 1, wherein, The method further comprises: sending at least one priority order information corresponding to the at least one first carrier frequency information to the first terminal.

5. The method according to any one of claims 1-4, characterized in that, In a case where the carrier frequency on which the first data is allowed to be transmitted does not include a transmission carrier frequency selected by the first terminal, the first configuration information is used by the first terminal to: filter at least one second carrier frequency from the at least one first carrier frequency, and select at least one direct link transmission carrier frequency from the at least one second carrier frequency according to a priority order of the at least one second carrier frequency.

6. A network device, comprising: The method comprises: a determining module configured to determine first configuration information; a first sending module configured to send the first configuration information to a first terminal; wherein the first configuration information comprises at least one first carrier frequency information and corresponding first channel congestion parameter information, the first carrier frequency information indicating an identity of a first carrier frequency, and the first channel congestion parameter information corresponding to the first carrier frequency information comprising a first channel congestion threshold of the first carrier frequency; the first configuration information is used by the first terminal to: filter at least one second carrier frequency from the at least one first carrier frequency, a channel congestion value corresponding to each second carrier frequency being less than or equal to the first channel congestion threshold corresponding to the each second carrier frequency; select at least one direct link transmission carrier frequency from the at least one second carrier frequency according to a priority order of the at least one second carrier frequency; the priority of a carrier frequency with a smaller channel congestion value in the at least one second carrier frequency is higher, or the priority of the at least one second carrier frequency is pre-configured by the network device; and send first data on the direct link transmission carrier frequency.

7. The network device of claim 6, wherein, The first configuration information is included in dedicated radio resource control (RRC) signaling or a system broadcast block (SIB) message sent by the first sending module.

8. The network device of claim 6, wherein, The first sending module is further configured to send dedicated radio resource control (RRC) signaling or a system broadcast block (SIB) message to the first terminal, where the RRC signaling or the SIB message is used by the first terminal to determine the channel congestion value corresponding to the second carrier frequency.

9. The network device of claim 6, wherein, The network device further includes: A second sending module configured to send at least one priority order information corresponding to the at least one first carrier frequency information to the first terminal.

10. The network device of any of claims 6-9, wherein, In a case where the first data allowed transmission carrier frequency does not include the transmission carrier frequency selected by the first terminal, the first configuration information is used by the first terminal to: filter at least one second carrier frequency from the at least one first carrier frequency, and select at least one direct link transmission carrier frequency from the at least one second carrier frequency according to the priority order of the at least one second carrier frequency.

11. A network device, comprising: It includes: A processor and a memory; The memory is coupled to the processor, and the memory is configured to store computer program code including computer instructions, and the processor is configured to invoke the computer instructions to enable the network device to perform the method of any one of claims 1-5.

12. A computer-readable storage medium, characterized in that, A computer program product for storing one or more computer programs, the one or more computer programs including instructions for performing the multi-carrier selection method of any one of claims 1-5 when the computer program is run on a computer.

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