A carrier selection method and a communication device

Abstract

The present invention discloses a carrier selection method and a communication device. The carrier selection method includes: when selecting a carrier, selecting a transmission carrier according to the service priority, the resource occupancy rate of the alternative carrier, and the remaining available resources. The solution of the present invention combines the resource occupancy rate and the remaining available resources for carrier selection, realizes the support for carrier aggregation and the optimized selection of carriers and resources.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to a carrier selection method and a communication device. Background Art

[0002] In the current 3GPP protocol version, LTE-V2X performs service transmission on a single carrier, does not support carrier aggregation, and only performs transmission resource selection on a single carrier, without supporting carrier selection in the case of multiple carriers.

[0003] Currently, the selection of transmission resources on a single carrier in LTE-V2X includes the following steps:

[0004] Step1: Mark all candidate resources within the resource selection window as available;

[0005] Step2: Exclude occupied resources, including two categories, as Figure 1 shown,

[0006] The first category is that in the sensing window, when the UE (terminal) itself transmits and cannot hear the service packets transmitted by other UEs on the transmission subframe, the above subframe becomes a skip subframe. It is necessary to assume that other UEs on this subframe have reserved the next resource in all cycles configured by the system, and the reserved resources overlap with the candidate subframe, or overlap with the 1st, 2nd,..., 10*counter - 1th transmission subframes after the candidate subframe. It is necessary to exclude the above candidate subframes;

[0007] The second category is that the resource information transmitted by other UEs is heard in the sensing window. According to the cycle and resource reservation information obtained therefrom, if the reserved resources overlap with the candidate resources, or overlap with the 1st, 2nd,..., 10*counter - 1th transmission resources after the candidate subframe, and the PSSCH-RSRP (Physical Sidelink Shared Channel - Reference Signal Received Power) measured according to SA is higher than the threshold value, the corresponding candidate resources need to be excluded;

[0008] If the remaining resource ratio is lower than 20% after step2, the threshold value is increased by 3 dB, and the exclusion process is re-executed until the remaining resource ratio reaches or is higher than 20%;

[0009] Step3: Perform S-RSSI (Received Signal Strength Indication) measurement and sorting on the candidate resources, select 20% of the resources with the lowest S-RSSI measurement values, and the higher layer selects resources from the above 20% candidate resources.

[0010] The existing resource selection method of LTE-V2X has the following problems:

[0011] The existing resource selection method is a single - carrier resource selection method and does not support carrier selection.

[0012] Only considering PPP and CBR (resource occupancy rate) for carrier selection, when the resource pool sizes on each carrier are different, selecting the carrier with a lower CBR is not the best. Summary of the Invention

[0013] An embodiment of the present invention provides a carrier selection method and a communication device, which perform carrier selection by combining the resource occupancy rate and the remaining available resources, realizing support for carrier aggregation and optimal selection of carriers and resources.

[0014] To solve the above - mentioned technical problems, the embodiments of the present invention provide the following technical solutions:

[0015] A carrier selection method, comprising:

[0016] When selecting a carrier, select a transmission carrier according to the service priority, the resource occupancy rate of the candidate carrier, and the remaining available resources.

[0017] Wherein, the remaining available resources are: in the resource pool, the remaining resources except for the resources to be occupied by the terminal, the resources reserved for occupancy by the terminal, the resources that may cause strong interference and / or are in half - duplex mode.

[0018] Wherein, selecting a transmission carrier according to the service priority, the resource occupancy rate of the candidate carrier, and the remaining available resources includes:

[0019] Select a transmission carrier according to the service priority and a carrier selection factor; wherein, the carrier selection factor is obtained according to the resource occupancy rate, the weight of the resource occupancy rate, the remaining available resources, and the weight of the remaining available resources.

[0020] Wherein, the carrier selection factor is obtained by the formula: Pj = a*(1 - CBRj)*100 + b*RRj;

[0021] Wherein, CBRj represents the resource occupancy rate of carrier j, RRj represents the remaining available resources of carrier j, a is the configured or pre - configured weight of the resource occupancy rate, b is the weight of the remaining available resources, and Pj is the carrier selection factor of carrier j.

[0022] Wherein, selecting a transmission carrier according to the service priority and the carrier selection factor includes:

[0023] According to the service priority, among the carrier selection factors of multiple carriers corresponding to this service priority, select at least one carrier with a larger carrier selection factor in descending order as the transmission carrier.

[0024] Among them, selecting a transmission carrier according to service priority, resource occupancy rate of alternative carriers, and remaining available resources includes:

[0025] Select a transmission carrier according to service priority and configured or pre-configured resource occupancy rate intervals.

[0026] Among them, selecting a transmission carrier according to service priority and configured or pre-configured resource occupancy rate intervals includes:

[0027] When the resource occupancy rates of multiple candidate carriers are respectively in different configured or pre-configured resource occupancy rate intervals, in ascending order of resource occupancy rate, select at least one carrier with more remaining available resources from multiple carriers in the interval with a smaller resource occupancy rate as the transmission carrier; if the number of carriers in this interval is less than the number of carriers to be selected, then select transmission carriers in ascending order from carriers in higher resource occupancy rate intervals in descending order of remaining available resources.

[0028] Among them, selecting a transmission carrier according to service priority, resource occupancy rate of alternative carriers, and remaining available resources includes:

[0029] Select a transmission carrier according to service priority and configured or pre-configured resource occupancy rate difference.

[0030] Among them, selecting a transmission carrier according to service priority and configured or pre-configured resource occupancy rate difference includes:

[0031] According to service priority, select at least one carrier from multiple candidate carriers as the transmission carrier in the following manner:

[0032] When the resource occupancy rate difference between different candidate carriers is greater than the configured or pre-configured resource occupancy rate difference, select at least one carrier with a smaller resource occupancy rate in ascending order of resource occupancy rate as the transmission carrier; when the resource occupancy rate difference between different candidate carriers is less than or equal to the configured resource occupancy rate difference, then select at least one carrier with more remaining available resources in descending order of remaining available resources as the transmission carrier.

[0033] Among them, selecting a transmission carrier according to service priority, resource occupancy rate of alternative carriers, and remaining available resources includes:

[0034] Select a transmission carrier according to service priority and configured or pre-configured remaining available resource difference between carriers.

[0035] Among them, selecting a transmission carrier according to service priority and configured or pre-configured remaining available resource difference between carriers includes:

[0036] Select at least one carrier as the transmission carrier from multiple candidate carriers according to the service priority in the following manner:

[0037] When the difference in the remaining available resources between different carriers is greater than the remaining available resource difference, select at least one carrier with more remaining available resources in descending order of the remaining available resources as the transmission carrier; when the difference in the remaining available resources between different carriers is less than or equal to the remaining available resource difference, select at least one carrier with a smaller resource occupancy rate in ascending order of the resource occupancy rate as the transmission carrier.

[0038] An embodiment of the present invention further provides a communication device, including:

[0039] A transceiver, configured to select a transmission carrier according to the service priority, the resource occupancy rate of the alternative carrier, and the remaining available resources when selecting a carrier.

[0040] Wherein, the remaining available resources are: the remaining resources in the resource pool except for the resources to be occupied by the terminal, reserved for occupation by the terminal, and resources that may cause strong interference and / or half-duplex.

[0041] Wherein, the transceiver is specifically configured to select a transmission carrier according to the service priority and a carrier selection factor; wherein, the carrier selection factor is a carrier selection factor obtained according to the resource occupancy rate, the weight of the resource occupancy rate, the remaining available resources, and the weight of the remaining available resources.

[0042] Wherein, the carrier selection factor is obtained by using the formula: Pj = a * (1 - CBRj) * 100 + b * RRj;

[0043] Wherein, CBRj represents the resource occupancy rate of carrier j, RRj represents the remaining available resources of carrier j, a is the weight of the configured or pre-configured resource occupancy rate, b is the weight of the remaining available resources, and Pj is the carrier selection factor of carrier j.

[0044] Wherein, the transceiver is specifically configured to select at least one carrier with a larger carrier selection factor in descending order from the carrier selection factors of multiple carriers corresponding to the service priority as the transmission carrier.

[0045] Wherein, the transceiver is specifically configured to select a transmission carrier according to the service priority and the configured or pre-configured resource occupancy rate range.

[0046] Wherein, the transceiver is specifically configured to, when the resource occupancy rates of multiple candidate carriers are respectively in different configured or pre-configured resource occupancy rate intervals, select at least one carrier with more remaining available resources in the interval as the transmission carrier from multiple carriers in the resource occupancy rate interval with a smaller value in ascending order of the resource occupancy rate, in descending order of the remaining available resources; if the number of carriers in this interval is less than the number of carriers to be selected, then select the transmission carrier in descending order of the remaining available resources from carriers in higher resource occupancy rate intervals in ascending order.

[0047] Wherein, the transceiver is specifically configured to select a transmission carrier according to the service priority, configured or pre-configured resource occupancy rate difference.

[0048] Wherein, the transceiver is specifically configured to select at least one carrier as the transmission carrier from multiple candidate carriers according to the service priority in the following manner:

[0049] When the difference in resource occupancy rates of different candidate carriers is greater than the configured or pre-configured resource occupancy rate difference, select at least one carrier with a smaller resource occupancy rate in ascending order of the resource occupancy rate as the transmission carrier; when the difference in resource occupancy rates of different candidate carriers is less than or equal to the configured resource occupancy rate difference, then select at least one carrier with more remaining available resources in descending order of the remaining available resources as the transmission carrier.

[0050] Wherein, the transceiver is specifically configured to select a transmission carrier according to the service priority, configured or pre-configured remaining available resource difference between carriers.

[0051] Wherein, the transceiver is specifically configured to select at least one carrier as the transmission carrier from multiple candidate carriers according to the service priority in the following manner:

[0052] When the difference in remaining available resources between different carriers is greater than the remaining available resource difference, select at least one carrier with more remaining available resources in descending order of the remaining available resources as the transmission carrier; when the difference in remaining available resources between different carriers is less than or equal to the remaining available resource difference, select at least one carrier with a smaller resource occupancy rate in ascending order of the resource occupancy rate as the transmission carrier.

[0053] An embodiment of the present invention further provides a carrier selection device, including:

[0054] A transceiver module, configured to select a transmission carrier according to the service priority, resource occupancy rate, and remaining available resources of alternative carriers when selecting a carrier.

[0055] Among them, the transceiver module is specifically configured to: select a transmission carrier according to the service priority and the carrier selection factor, where the carrier selection factor is a carrier selection factor obtained according to the resource occupancy rate, the weight of the resource occupancy rate, the remaining available resources, and the weight of the remaining available resources; or

[0056] select a transmission carrier according to the service priority and the configured or pre-configured resource occupancy rate range; or

[0057] select a transmission carrier according to the service priority and the configured or pre-configured resource occupancy rate difference; or

[0058] select a transmission carrier according to the service priority and the configured or pre-configured difference in remaining available resources between carriers.

[0059] An embodiment of the present invention further provides a communication device, including:

[0060] a processor configured to perform the following functions: when selecting a carrier, select a transmission carrier according to the service priority, the resource occupancy rate of the alternative carrier, and the remaining available resources.

[0061] An embodiment of the present invention further provides a computer storage medium, including instructions that, when run on a computer, cause the computer to execute the method described above.

[0062] The beneficial effects of the embodiments of the present invention are:

[0063] In the above embodiments of the present invention, when selecting a carrier, a transmission carrier is selected according to the service priority, the resource occupancy rate of the alternative carrier, and the remaining available resources. By combining the resource occupancy rate and the remaining available resources for carrier selection, support for carrier aggregation and optimized selection of carriers and resources are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 A schematic diagram showing the selection of transmission resources on a single carrier;

[0065] Figure 2 A schematic flowchart showing the carrier selection method of the present invention;

[0066] Figure 3 A block diagram showing the structure of the communication device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0067] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0068] An embodiment of the present invention provides a carrier selection method. When a terminal or a base station selects a carrier, in addition to considering the service priority (PPPP for the PC5 interface), the carrier selection is comprehensively based on the resource occupancy rate of the alternative carriers (CBR for the PC5 interface) and the amount of remaining available resources to select the transmission carrier, so as to support carrier aggregation and optimize the selection of carriers and resources.

[0069] In an embodiment of the present invention, a carrier selection method includes:

[0070] Step 21, start selecting a carrier;

[0071] Step 22, when selecting a carrier, select the transmission carrier according to the service priority, the resource occupancy rate of the alternative carriers, and the remaining available resources.

[0072] Wherein, the remaining available resources are: in the resource pool, the remaining resources except for the resources to be occupied by the terminal, reserved for occupancy by the terminal, resources that may cause strong interference and / or are in half-duplex mode. Here, the base station receives the reporting information sent by the surrounding terminals that the terminal demodulates, and can learn the resources occupied and reserved for occupancy by the UE therefrom. If there is no further reservation, it indicates that the resource will not be occupied subsequently. For the reporting information that fails to be demodulated, but information is detected on the resource, it means that the transmitting UE has reserved a certain subsequent resource.

[0073] In this embodiment of the present invention, by selecting the transmission carrier according to the service priority, the resource occupancy rate of the alternative carriers, and the remaining available resources when selecting a carrier. The carrier selection is combined with the resource occupancy rate and the remaining available resources to support carrier aggregation and optimize the selection of carriers and resources.

[0074] In a specific embodiment of the present invention, a carrier selection method includes:

[0075] Select the transmission carrier according to the service priority and the carrier selection factor; wherein, the carrier selection factor is obtained according to the resource occupancy rate, the weight of the resource occupancy rate, the remaining available resources, and the weight of the remaining available resources.

[0076] In this embodiment, the carrier selection factor is obtained by the formula: Pj = a * (1 - CBRj) * 100 + b * RRj;

[0077] Wherein, CBRj represents the resource occupancy rate of carrier j, RRj represents the remaining available resources of carrier j, a is the weight of the configured or pre-configured resource occupancy rate, b is the weight of the remaining available resources, Pj is the carrier selection factor of carrier j, and the value of b here can be 1 - a, or other values independent of a.

[0078] Among them, according to the service priority and the carrier selection factor, the transmission carrier is selected, including:

[0079] According to the service priority, among the carrier selection factors of multiple carriers corresponding to this service priority, at least one carrier with a larger carrier selection factor is selected in descending order as the transmission carrier.

[0080] In this embodiment, the larger the Pj, the greater the probability that carrier j is selected. It can also be to select one or more carriers in descending order of Pj.

[0081] Example 1: For example, the resource occupancy rate of carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of carrier 2 is 40%, and the remaining available resources are 10 sub-channels. The configured weight of the resource occupancy rate is 0.6, and the weight of the remaining available resources is 0.4;

[0082] The selected factor of carrier 1 is: P1 = 0.6 * (1 - 0.5) * 100 + 0.4 * 20 = 38;

[0083] The selected factor of carrier 2 is: P2 = 0.6 * (1 - 0.4) * 100 + 0.4 * 10 = 40;

[0084] The terminal selects carrier 2 as the transmission carrier.

[0085] Example 2: The resource occupancy rate of carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of carrier 2 is 40%, and the remaining available resources are 10 sub-channels. The configured weight of the resource occupancy rate is 0.4, and the weight of the remaining available resources is 0.6;

[0086] The selected factor of carrier 1 is: P1 = 0.4 * (1 - 0.5) * 100 + 0.6 * 20 = 32;

[0087] The selected factor of carrier 2 is: P2 = 0.4 * (1 - 0.4) * 100 + 0.6 * 10 = 30;

[0088] The terminal selects carrier 1 as the transmission carrier.

[0089] Example 3: The candidate carriers corresponding to the service priority transmitted by the terminal are 4 carriers, and the terminal needs to select 2 of them as the transmission carriers. Among them, the resource occupancy rate of carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of carrier 2 is 40%, and the remaining available resources are 10 sub-channels. The resource occupancy rate of carrier 3 is 30%, and the remaining available resources are 25 sub-channels. The resource occupancy rate of carrier 4 is 40%, and the remaining available resources are 20 sub-channels. The configured weight of the resource occupancy rate is 0.4, and the weight of the remaining available resources is 0.8;

[0090] The selected factor of Carrier 1 is: P1 = 0.4 * (1 - 0.5) * 100 + 0.8 * 20 = 36;

[0091] The selected factor of Carrier 2 is: P2 = 0.4 * (1 - 0.4) * 100 + 0.8 * 10 = 32;

[0092] The selected factor of Carrier 3 is: P3 = 0.4 * (1 - 0.3) * 100 + 0.8 * 25 = 48;

[0093] The selected factor of Carrier 4 is: P4 = 0.4 * (1 - 0.4) * 100 + 0.8 * 20 = 40;

[0094] The terminal selects Carrier 3 and Carrier 4 as the transmission carriers in the order of the carrier selection factors from large to small.

[0095] In a specific embodiment of the present invention, a carrier selection method includes:

[0096] Select a transmission carrier according to the service priority, configured or pre-configured resource occupancy rate intervals. The resource occupancy rate intervals are, for example, configured or pre-configured as 0 - 30%, 30% - 50%, 50% - 70%, 70% - 80%, 80% - 100%;

[0097] Specifically, selecting a transmission carrier according to the service priority, configured or pre-configured resource occupancy rate intervals includes:

[0098] When the resource occupancy rates of multiple candidate carriers are respectively in different configured or pre-configured resource occupancy rate intervals, in the order of the resource occupancy rate from small to large, select at least one carrier with more remaining available resources from the multiple carriers in the interval with a smaller resource occupancy rate as the transmission carrier; if the number of carriers in this interval is less than the number of carriers to be selected, then in the order of from small to large, select the transmission carriers in the carriers in the higher resource occupancy rate intervals in the order of the remaining available resources from large to small.

[0099] Example 1: The configured or pre-configured resource occupancy rate intervals are 5 intervals: 0 - 30%, 30% - 50%, 50% - 70%, 70% - 80%, 80% - 100%;

[0100] The resource occupancy rate of Carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of Carrier 2 is 40%, and the remaining available resources are 10 sub-channels;

[0101] Both Carrier 1 and Carrier 2 are in the resource occupancy rate interval 2 (30% - 50%), then the terminal selects Carrier 1 with more remaining available resources as the transmission carrier;

[0102] Example 2: Configure or pre-configure 5 resource occupancy rate intervals: 0 - 30%, 30% - 50%, 50% - 70%, 70% - 80%, 80% - 100%;

[0103] The resource occupancy rate of Carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of Carrier 2 is 20%, and the remaining available resources are 10 sub-channels;

[0104] If Carrier 1 and Carrier 2 are respectively in Resource Occupancy Rate Interval 1 (0% - 30%) and Resource Occupancy Rate Interval 2 (30% - 50%), then the terminal selects Carrier 2 with a lower resource occupancy rate as the transmission carrier.

[0105] Example 3: Configure or pre-configure 5 resource occupancy rate intervals: 0 - 30%, 30% - 50%, 50% - 70%, 70% - 80%, 80% - 100%;

[0106] The candidate carriers corresponding to the service priority sent by the terminal are 4 carriers, and the terminal needs to select 2 of them as the transmission carriers. Among them, the resource occupancy rate of Carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of Carrier 2 is 40%, and the remaining available resources are 10 sub-channels. The resource occupancy rate of Carrier 3 is 25%, and the remaining available resources are 25 sub-channels. The resource occupancy rate of Carrier 4 is 40%, and the remaining available resources are 25 sub-channels;

[0107] Carrier 1, Carrier 2, and Carrier 4 are all in Resource Occupancy Rate Interval 2 (30% - 50%), and Carrier 3 is in Resource Occupancy Rate Interval 1 (0% - 30%). Then the terminal first selects Carrier 3 as a transmission carrier according to the ascending order of the resource occupancy rate intervals, and then among the 3 carriers in Interval 2, selects Carrier 4 with more remaining available resources as the transmission carrier according to the number of remaining available resources;

[0108] In a specific embodiment of the present invention, a carrier selection method includes:

[0109] Select a transmission carrier according to the service priority and the configured or pre-configured resource occupancy rate difference.

[0110] Specifically, selecting a transmission carrier according to the service priority and the configured or pre-configured resource occupancy rate difference includes:

[0111] According to the service priority, select at least one carrier as the transmission carrier from multiple candidate carriers in the following manner:

[0112] When the difference in resource occupancy rates between different candidate carriers is greater than the configured or pre-configured resource occupancy rate difference, at least one carrier with a smaller resource occupancy rate is selected in ascending order of resource occupancy rate as the transmission carrier; when the difference in resource occupancy rates between different candidate carriers is less than or equal to the configured resource occupancy rate difference, at least one carrier with more remaining available resources is selected in descending order of the remaining available resources as the transmission carrier.

[0113] Example 1: The configured or pre-configured resource occupancy rate difference is 10%;

[0114] The resource occupancy rate of Carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of Carrier 2 is 40%, and the remaining available resources are 10 sub-channels;

[0115] The difference in resource occupancy rates between Carrier 1 and Carrier 2 is 10%, which is less than or equal to the configured resource occupancy rate difference. Then the terminal selects Carrier 1 with more remaining available resources as the transmission carrier.

[0116] Example 2: The configured or pre-configured resource occupancy rate difference is 10%;

[0117] The resource occupancy rate of Carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of Carrier 2 is 30%, and the remaining available resources are 10 sub-channels;

[0118] The difference in resource occupancy rates between Carrier 1 and Carrier 2 is 20%, which is greater than the configured resource occupancy rate difference. Then the terminal selects Carrier 2 with a lower resource occupancy rate as the transmission carrier.

[0119] Example 3: The configured or pre-configured resource occupancy rate difference is 10%;

[0120] The candidate carriers corresponding to the service priority sent by the terminal are 4 carriers, and the terminal needs to select 2 of them as the transmission carriers. Among them, the resource occupancy rate of Carrier 1 is 55%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of Carrier 2 is 40%, and the remaining available resources are 10 sub-channels. Among them, the resource occupancy rate of Carrier 3 is 25%, and the remaining available resources are 25 sub-channels. The resource occupancy rate of Carrier 4 is 40%, and the remaining available resources are 25 sub-channels;

[0121] After comparing the resource occupancy rate differences of the 4 carriers, the differences between the resource occupancy rate of Carrier 3 and the resource occupancy rates of the other 3 carriers are all less than the configured resource occupancy rate difference. Carrier 3 is selected as one transmission carrier. Among the remaining 3 carriers, the differences between the resource occupancy rate of Carrier 1 and the resource occupancy rates of the other 2 carriers are all greater than the configured resource occupancy rate difference, and the resource occupancy rates of Carrier 2 and Carrier 4 are the same. According to the principle, Carrier 4 with more remaining available resources is selected from Carrier 2 and Carrier 4 with smaller resource occupancy rates as the transmission carrier.

[0122] In a specific embodiment of the present invention, a carrier selection method includes:

[0123] Select a transmission carrier according to the service priority and the remaining available resource difference between pre-configured or configured carriers.

[0124] Specifically, selecting a transmission carrier according to the service priority and the remaining available resource difference between pre-configured or configured carriers includes:

[0125] According to the service priority, select at least one carrier from multiple candidate carriers as the transmission carrier in the following manner:

[0126] When the difference in remaining available resources between different carriers is greater than the remaining available resource difference, select at least one carrier with more remaining available resources as the transmission carrier in descending order of remaining available resources; when the difference in remaining available resources between different carriers is less than or equal to the remaining available resource difference, select at least one carrier with a smaller resource occupancy rate as the transmission carrier in ascending order of resource occupancy rate.

[0127] Example 1: Configure or pre-configure the remaining available resource difference between carriers to be 4 sub-channels;

[0128] The resource occupancy rate of Carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of Carrier 2 is 30%, and the remaining available resources are 10 sub-channels;

[0129] The difference in remaining available resources between Carrier 1 and Carrier 2 is 10 sub-channels, which is greater than the configured remaining available resource difference. Then the terminal selects Carrier 1 with more remaining available resources as the transmission carrier.

[0130] Example 2: Configure or pre-configure the remaining available resource difference between carriers to be 4 sub-channels;

[0131] The resource occupancy rate of Carrier 1 is 50%, and the remaining available resources are 20 sub-channels. The resource occupancy rate of Carrier 2 is 30%, and the remaining available resources are 18 sub-channels;

[0132] The difference in remaining available resources between Carrier 1 and Carrier 2 is 2 sub-channels, which is less than the configured remaining available resource difference. Then the terminal selects Carrier 2 with a lower resource occupancy rate as the transmission carrier.

[0133] Example 3: Configure or pre-configure the remaining available resource difference between carriers to be 4 sub-channels;

[0134] The candidate carriers corresponding to the service priority sent by the terminal are 4 carriers, and the terminal needs to select 2 of them as the sending carriers. Among them, the resource occupancy rate of Carrier 1 is 55%, and the remaining available resources are 23 sub-channels. The resource occupancy rate of Carrier 2 is 40%, and the remaining available resources are 10 sub-channels. The resource occupancy rate of Carrier 3 is 25%, and the remaining available resources are 25 sub-channels. The resource occupancy rate of Carrier 4 is 40%, and the remaining available resources are 22 sub-channels;

[0135] After comparing the differences in the remaining available resource numbers of the 4 carriers, the differences in the remaining available resource numbers among the 3 carriers, namely Carrier 1, Carrier 3, and Carrier 4, are all less than the configured difference in the remaining available resource numbers, while the differences in the remaining available resource numbers between Carrier 2 and the other 3 carriers are all greater than the configured difference in the remaining available resource numbers. Select Carrier 3 and Carrier 4 as the sending carriers in ascending order of resource occupancy rate from Carrier 1, Carrier 3, and Carrier 4.

[0136] In the above embodiments of the present invention, the specific method for the terminal or the base station to select carriers according to the resource occupancy rate and the remaining available resources may be a combination of one or more of the above embodiments.

[0137] In the above embodiments of the present invention, compared with the existing LTE V2X solution that only supports resource selection on a single carrier and cannot support carrier selection and resource selection in the case of multi-carrier aggregation, through one or more combinations of the following methods, combining the resource occupancy rate and the remaining available resources for carrier selection, the support for carrier aggregation and the optimal selection of carriers and resources are realized:

[0138] 1: Combine the calculation formulas of the resource occupancy rate and the remaining available resources, where the weights of the resource occupancy rate and the remaining available resources can be configured or pre-configured;

[0139] 2: Configure or pre-configure the resource occupancy rate interval. When the resource occupancy rate of the candidate carrier is in different intervals, the resource occupancy rate is given priority. When the resource occupancy rates are in the same interval, the remaining available resources are given priority;

[0140] 3: Configure or pre-configure the difference in the resource occupancy rate between carriers (for example, configure or pre-configure the resource occupancy rate difference to be 10%). When the difference in the resource occupancy rates of the candidate carriers is greater than the configured resource occupancy rate difference, the resource occupancy rate is given priority. When the difference in the resource occupancy rates of the candidate carriers is less than or equal to the configured resource occupancy rate difference, the remaining available resources are given priority;

[0141] 4: Configure or pre-configure the difference in remaining available resources between carriers (for example, configure or pre-configure the difference in remaining available resources to be 4 sub-channels). When the difference in remaining available resources between different carriers is within the range of the difference in remaining available resources, the resource occupancy rate is given priority. If the difference in remaining available resources between carriers is greater than the difference in remaining available resources, the remaining available resources are given priority.

[0142] An embodiment of the present invention further provides a communication device 30, which may be a terminal or a base station. The communication device 30 includes:

[0143] A transceiver 31, configured to select a transmission carrier according to the service priority, the resource occupancy rate of the alternative carrier, and the remaining available resources when selecting a carrier.

[0144] Wherein, the remaining available resources are: the remaining resources in the resource pool except for the resources to be occupied by the terminal, reserved by the terminal for occupancy, resources that may cause strong interference and / or half-duplex. Here, the base station receives the reporting information sent by the surrounding terminals received by the terminal through demodulation, and can learn the resources occupied and reserved by the UE therefrom. If there is no reservation anymore, it means that the resource will not be occupied subsequently. For the reporting information that fails to be demodulated, but information is detected on the resource, the sending UE reserves a subsequent resource.

[0145] In a specific embodiment of the present invention, the transceiver 31 is specifically configured to select a transmission carrier according to the service priority and the carrier selection factor; wherein, the carrier selection factor is a carrier selection factor obtained according to the resource occupancy rate, the weight of the resource occupancy rate, the remaining available resources, and the weight of the remaining available resources.

[0146] The carrier selection factor is obtained by the formula: Pj = a * (1 - CBRj) * 100 + b * RRj;

[0147] Wherein, CBRj represents the resource occupancy rate of carrier j, RRj represents the remaining available resources of carrier j, a is the weight of the configured or pre-configured resource occupancy rate, b is the weight of the remaining available resources, and Pj is the carrier selection factor of carrier j.

[0148] In a specific embodiment of the present invention, the transceiver 31 is specifically configured to select, according to the service priority, at least one carrier with a larger carrier selection factor from the carrier selection factors of multiple carriers corresponding to the service priority in descending order as the transmission carrier.

[0149] In a specific embodiment of the present invention, the transceiver is specifically configured to select a transmission carrier according to the service priority and the configured or pre-configured resource occupancy rate range.

[0150] Among them, the transceiver 31 is specifically configured to, when the resource occupancy rates of multiple candidate carriers are respectively in different configured or pre-configured resource occupancy rate intervals, select at least one carrier with more remaining available resources in this interval as the transmission carrier from multiple carriers in the interval with a smaller resource occupancy rate in ascending order of the resource occupancy rate; if the number of carriers in this interval is less than the number of carriers to be selected, then select transmission carriers in ascending order from carriers in a higher resource occupancy rate interval in descending order of the remaining available resources.

[0151] In a specific embodiment of the present invention, the transceiver 31 is specifically configured to select a transmission carrier according to the service priority, the configured or pre-configured resource occupancy rate difference.

[0152] Among them, the transceiver 31 is specifically configured to select at least one carrier as the transmission carrier from multiple candidate carriers according to the service priority in the following manner:

[0153] When the difference in resource occupancy rates of different candidate carriers is greater than the configured or pre-configured resource occupancy rate difference, select at least one carrier with a smaller resource occupancy rate in ascending order of the resource occupancy rate as the transmission carrier; when the difference in resource occupancy rates of different candidate carriers is less than or equal to the configured resource occupancy rate difference, then select at least one carrier with more remaining available resources in descending order of the remaining available resources as the transmission carrier.

[0154] In a specific embodiment of the present invention, the transceiver 31 is specifically configured to select a transmission carrier according to the service priority, the configured or pre-configured remaining available resource difference between carriers.

[0155] Among them, the transceiver 31 is specifically configured to select at least one carrier as the transmission carrier from multiple candidate carriers according to the service priority in the following manner:

[0156] When the difference in remaining available resources between different carriers is greater than the remaining available resource difference, select at least one carrier with more remaining available resources in descending order of the remaining available resources as the transmission carrier; when the difference in remaining available resources between different carriers is less than or equal to the remaining available resource difference, select at least one carrier with a smaller resource occupancy rate in ascending order of the resource occupancy rate as the transmission carrier.

[0157] It should be noted that, in this communication device, it may further include: a processor 32, and may also include a memory 33. The transceiver 31 is communicatively connected to the processor 32 through a bus interface or an interface, and the transceiver 31 may also be communicatively connected to the memory 32 through a bus interface or an interface. The functions of the above transceiver may also be implemented by the processor. The communication device of the present invention may further include other components for implementing the above method, such as a user interface 34. All implementation manners in the above method embodiments are applicable to the embodiments of this communication device and can also achieve the same technical effects.

[0158] An embodiment of the present invention further provides a carrier selection device, including:

[0159] a transceiver module, configured to select a transmission carrier according to the service priority, the resource occupancy rate of the alternative carrier, and the remaining available resources when selecting a carrier.

[0160] Wherein, the transceiver module is specifically configured to: select a transmission carrier according to the service priority and a carrier selection factor; wherein, the carrier selection factor is a carrier selection factor obtained according to the resource occupancy rate, the weight of the resource occupancy rate, the remaining available resources, and the weight of the remaining available resources; or

[0161] select a transmission carrier according to the service priority and a configured or pre-configured resource occupancy rate range; or

[0162] select a transmission carrier according to the service priority and a configured or pre-configured resource occupancy rate difference; or

[0163] select a transmission carrier according to the service priority and a configured or pre-configured difference in the remaining available resources between carriers.

[0164] It should be noted that this device may be disposed in a terminal or a base station. All implementation manners in the above method are applicable to the embodiments of this device and can also achieve the same technical effects.

[0165] An embodiment of the present invention further provides a communication device, including:

[0166] a processor, configured to perform the following functions: when selecting a carrier, select a transmission carrier according to the service priority, the resource occupancy rate of the alternative carrier, and the remaining available resources.

[0167] An embodiment of the present invention further provides a computer storage medium, including instructions, which when run on a computer, cause the computer to execute the method as described above.

[0168] Embodiments of the present invention address the problem that existing LTE V2X solutions only support resource selection on a single carrier and cannot support carrier selection and resource selection in the case of multi-carrier. A carrier selection method is proposed, which combines the resource occupancy rate and the remaining available resources for carrier selection to achieve support for carrier aggregation and optimal selection of carriers and resources.

[0169] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. A professional technician can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0170] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0171] In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0172] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0173] In addition, the functional units in various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0174] When the above-mentioned functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0175] In addition, it should be noted that in the devices and methods of the present invention, obviously, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. And, the steps of performing the above series of processes can naturally be executed in chronological order according to the described order, but it is not necessary to execute them in chronological order. Some steps can be executed in parallel or independently of each other. For those of ordinary skill in the art, it can be understood that all or any steps or components of the methods and devices of the present invention can be implemented in any computing device (including processors, storage media, etc.) or in a network of computing devices in the form of hardware, firmware, software, or a combination thereof, which can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

[0176] Therefore, the object of the present invention can also be achieved by running a program or a set of programs on any computing device. The computing device can be a well-known general-purpose device. Therefore, the object of the present invention can also be achieved only by providing a program product containing program codes for implementing the method or device. That is to say, such a program product also constitutes the present invention, and the storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any well-known storage medium or any storage medium developed in the future. It should also be noted that in the devices and methods of the present invention, obviously, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. And, the steps of performing the above series of processes can naturally be executed in chronological order according to the described order, but it is not necessary to execute them in chronological order. Some steps can be executed in parallel or independently of each other.

[0177] The above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements can be made without departing from the principle described in the present invention, and these improvements and refinements are also within the protection scope of the present invention.

Claims

1. A carrier selection method, characterized in that, it includes: selecting a transmission carrier according to service priority, configured or pre-configured resource occupancy intervals; The step of selecting a transmission carrier according to service priority, configured or pre-configured resource occupancy intervals includes: When the resource occupancies of multiple candidate carriers are respectively in different configured or pre-configured resource occupancy intervals, in the order of increasing resource occupancy, from multiple carriers in the interval with a smaller resource occupancy, select at least one carrier with more remaining available resources in this interval in the order of decreasing remaining available resources as the transmission carrier.

2. The carrier selection method according to claim 1, characterized in that, the remaining available resources are: in the resource pool, the remaining resources except for the resources to be occupied by the terminal, the resources reserved by the terminal for occupancy, the resources that may cause strong interference and / or half-duplex.

3. The carrier selection method according to claim 1, characterized in that, selecting a transmission carrier according to service priority, the resource occupancy of alternative carriers and the remaining available resources includes: selecting a transmission carrier according to service priority and a carrier selection factor; wherein, the carrier selection factor is a carrier selection factor obtained according to the resource occupancy, the weight of the resource occupancy, the remaining available resources and the weight of the remaining available resources.

4. The carrier selection method according to claim 3, characterized in that, the carrier selection factor is obtained by the formula: Pj = a*(1 - CBRj)*100 + b*RRj; wherein, CBRj represents the resource occupancy of carrier j, RRj represents the remaining available resources of carrier j, a is the weight of the configured or pre-configured resource occupancy, b is the weight of the remaining available resources, and Pj is the carrier selection factor of carrier j.

5. The carrier selection method according to claim 4, characterized in that, selecting a transmission carrier according to service priority and a carrier selection factor includes: According to service priority, among the carrier selection factors of multiple carriers corresponding to this service priority, select at least one carrier with a larger carrier selection factor in the order of decreasing carrier selection factor as the transmission carrier.

6. The carrier selection method according to claim 1, characterized in that, selecting a transmission carrier according to service priority, configured or pre-configured resource occupancy difference includes: According to service priority, select at least one carrier from multiple candidate carriers as the transmission carrier in the following manner: When the resource occupancy difference between different candidate carriers is greater than the configured or pre-configured resource occupancy difference, in the order of increasing resource occupancy, select at least one carrier with a smaller resource occupancy as the transmission carrier; when the resource occupancy difference between different candidate carriers is less than or equal to the configured resource occupancy difference, then in the order of decreasing remaining available resources, select at least one carrier with more remaining available resources as the transmission carrier.

7. The carrier selection method according to claim 1, characterized in that, selecting a transmission carrier according to service priority, configured or pre-configured remaining available resource difference between carriers includes: Select at least one carrier as the transmission carrier from multiple candidate carriers according to the service priority in the following manner: When the difference in the remaining available resources between different carriers is greater than the remaining available resource difference, select at least one carrier with more remaining available resources in descending order of the remaining available resources as the transmission carrier; when the difference in the remaining available resources between different carriers is less than or equal to the remaining available resource difference, select at least one carrier with a smaller resource occupancy rate in ascending order of the resource occupancy rate as the transmission carrier.

8. A communication device Characterized in that Comprising: A transceiver is used to select a transmission carrier according to the service priority, configuration or pre-configured resource occupancy rate range Specifically, when the resource occupancy rates of multiple candidate carriers are respectively in different configured or pre-configured resource occupancy rate ranges, the transceiver selects at least one carrier with more remaining available resources in this range in descending order of the remaining available resources from multiple carriers in the range with a smaller resource occupancy rate as the transmission carrier.

9. The communication device according to claim 8 Characterized in that The remaining available resources are: the remaining resources in the resource pool except for the resources to be occupied by the terminal, reserved for occupancy by the terminal, resources that may cause strong interference and / or are half-duplex.

10. The communication device according to claim 8 Characterized in that The transceiver is specifically used to select a transmission carrier according to the service priority and the carrier selection factor; wherein, the carrier selection factor is a carrier selection factor obtained according to the resource occupancy rate, the weight of the resource occupancy rate, the remaining available resources and the weight of the remaining available resources.

11. The communication device according to claim 10 Characterized in that The carrier selection factor is obtained by the formula: Pj = a * (1 - CBRj) * 100 + b * RRj; Wherein, CBRj represents the resource occupancy rate of carrier j, RRj represents the remaining available resources of carrier j, a is the weight of the configured or pre-configured resource occupancy rate, b is the weight of the remaining available resources, and Pj is the carrier selection factor of carrier j.

12. The communication device according to claim 11 Characterized in that The transceiver is specifically used to select at least one carrier with a larger carrier selection factor in descending order of the carrier selection factors of multiple carriers corresponding to the service priority as the transmission carrier according to the service priority.

13. The communication device according to claim 10 Characterized in that The transceiver is specifically used to select at least one carrier as the transmission carrier from multiple candidate carriers according to the service priority in the following manner: When the difference in resource occupancy rates between different candidate carriers is greater than the configured or pre-configured resource occupancy rate difference, at least one carrier with a smaller resource occupancy rate is selected in ascending order of resource occupancy rate as the transmission carrier; when the difference in resource occupancy rates between different candidate carriers is less than or equal to the configured resource occupancy rate difference, at least one carrier with more remaining available resources is selected in descending order of remaining available resources as the transmission carrier.

14. The communication device according to claim 10, wherein, the transceiver is specifically configured to select at least one carrier as the transmission carrier from multiple candidate carriers according to the service priority in the following manner: When the difference in remaining available resources between different carriers is greater than the remaining available resource difference, at least one carrier with more remaining available resources is selected in descending order of remaining available resources as the transmission carrier; when the difference in remaining available resources between different carriers is less than or equal to the remaining available resource difference, at least one carrier with a smaller resource occupancy rate is selected in ascending order of resource occupancy rate as the transmission carrier.

15. A carrier selection device, wherein, comprising: a transceiver module, configured to select a transmission carrier according to the service priority, the configured or pre-configured resource occupancy rate range; selecting a transmission carrier according to the service priority, the configured or pre-configured resource occupancy rate range includes: When the resource occupancy rates of multiple candidate carriers are respectively in different configured or pre-configured resource occupancy rate ranges, at least one carrier with more remaining available resources in the range is selected in descending order of remaining available resources from multiple carriers in the range with a smaller resource occupancy rate in ascending order of resource occupancy rate as the transmission carrier.

16. The carrier selection device according to claim 15, wherein, the transceiver module is specifically configured to: select a transmission carrier according to the service priority and the carrier selection factor; wherein, the carrier selection factor is a carrier selection factor obtained according to the resource occupancy rate, the weight of the resource occupancy rate, the remaining available resources, and the weight of the remaining available resources; or select a transmission carrier according to the service priority, the configured or pre-configured resource occupancy rate range; or select a transmission carrier according to the service priority, the configured or pre-configured resource occupancy rate difference; or select a transmission carrier according to the service priority, the configured or pre-configured difference in remaining available resources between carriers.

17. A communication device, wherein, comprising: a processor configured to perform the following functions: select a transmission carrier according to the service priority, the configured or pre-configured resource occupancy rate range; selecting a transmission carrier according to the service priority, the configured or pre-configured resource occupancy rate range includes: When the resource occupancy rates of multiple candidate carriers are respectively in different configured or pre-configured resource occupancy rate ranges, at least one carrier with more remaining available resources in the range is selected in descending order of remaining available resources from multiple carriers in the range with a smaller resource occupancy rate in ascending order of resource occupancy rate as the transmission carrier.

18. A computer storage medium, It is characterized in that it includes an instruction, which, when run on a computer, causes the computer to execute the method according to any one of claims 1-7.

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