Power determination method, device and system

Abstract

The invention discloses a power determination method, device and system, and the method comprises the steps: determining the transmission power of a side link according to the transmission number of the side link transmitted by a device when the total transmission power of a plurality of carriers exceeds the maximum transmission power of the device. According to the power determination method provided by the invention, the problem that the total transmitting power of a plurality of carriers exceeds the maximum transmitting power of the equipment due to the fact that each carrier uses relatively high or maximum transmitting power is avoided.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a power determination method, device and system. Background Art

[0002] With the continuous advancement of radio technology, a variety of radio services have emerged. In the NR (New Radio) system involving V2X (Vehicle to anything, wireless communication between vehicles and other nodes) deployment scenarios, CA (Carrier Aggregation) needs to be considered. If each carrier in CA uses a larger or maximum transmission power, the total transmission power of the device will exceed the maximum power of the device, resulting in power limitation. Summary of the invention

[0003] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0004] The embodiments of the present application provide a power determination method, device and system, which can ensure the determination and adjustment of transmit power in a CA scenario.

[0005] In a first aspect, an embodiment of the present application provides a power determination method, including:

[0006] When the total transmission power of several carriers exceeds the maximum transmission power of the device, the transmission power of the side link is determined according to the transmission quantity of the side link transmitted by the device.

[0007] In a second aspect, an embodiment of the present application provides a power determination system, comprising a power determination device, wherein the power determination device is used to determine the transmission power of the side link according to the number of transmissions of the side link transmitted by the device when the total transmission power of several carriers exceeds the maximum transmission power of the device.

[0008] In a third aspect, an embodiment of the present application provides a power determination device, comprising at least one processor and a memory for communicating with the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the power determination method as described in the first aspect.

[0009] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the power determination method as described above.

[0010] The power determination method, device and system provided in the embodiments of the present application, when involving carrier aggregation in a V2X scenario, determine the total transmit power of multiple carriers according to the maximum transmit power of the device, thereby avoiding the problem that each carrier uses a larger or maximum transmit power, causing the total transmit power of multiple carriers to exceed the maximum transmit power of the device.

[0011] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the examples of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0013] Figure 1 is an overall flow chart of a power determination method provided by an embodiment of the present application;

[0014] Figure 2 is a flowchart diagram of determining the number of transmissions of an edge link provided by an embodiment of the present application;

[0015] Figure 3 It is a flowchart of discarding a side link according to the priority value of the side link provided by an embodiment of the present application;

[0016] Figure 4 is a flow chart of determining the transmission power of a carrier provided by an embodiment of the present application;

[0017] Figure 5 It is a structural connection diagram of a power determination device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] The link for V2X business communication is called SL (Sidelink). The side link is abbreviated as LTE V2X or LTE-V or LTE sidelink in LTE (Long Term Evolution), and is abbreviated as NR V2X or NR-V or NR sidelink in NR. The main channels of the side link include PSCCH (Physical sidelink control channel) and PSSCH (Physical sidelink shared channel), where PSCCH carries sidelink control information and PSSCH carries business data. When there is business to be transmitted between devices, the business data between the devices is not forwarded by other network devices, but is directly transmitted from the data source device to the target device, that is, direct communication between devices. These devices are UE (User Equipment) with V2X function.

[0020] In the NR system involving V2X deployment scenarios, carrier aggregation needs to be considered. If each carrier in carrier aggregation uses a larger or maximum transmit power, the total transmit power of the device will exceed the maximum power of the device, resulting in power limitation.

[0021] Based on this, an embodiment of the present application provides a power determination method, device and system. When the total transmission power of several carriers exceeds the maximum transmission power of the device, the transmission power of the side link is determined according to the number of transmissions of the side link transmitted by the device.

[0022] Reference Figure 1 As shown, an embodiment of the present application provides a power determination method, in which a device performs carrier aggregation in a V2X deployment scenario, and performs power control on a transmitted carrier to determine the power of the transmitted carrier, and the power determination method includes but is not limited to the following steps:

[0023] Step S100, determining the maximum transmit power of the device;

[0024] Step S200: When the total transmission power of several carriers exceeds the maximum transmission power of the device, the transmission power of the side link is determined according to the transmission quantity of the side link transmitted by the device.

[0025] For each carrier that performs carrier aggregation, the device allocates transmission power to it and carries the carrier through the side link. NRsidelink supports single-carrier transmission, and the device sends data to the outside through the side link carrying the corresponding carrier. In the absence of power control on the carrier, the transmission power of the carrier takes its maximum power or the maximum power calculated according to the channel busy rate, which will make the total transmission power of multiple carriers exceed the maximum transmission power of the device. At this time, power reduction or adjustment is required to determine the transmission power of the carrier. In the embodiment of the present application, according to the number of transmissions of the side link transmitted by the device, power is allocated to the corresponding carriers of each side link, that is, the transmission power of the side link is determined.

[0026] The above-mentioned several carriers constitute a carrier set, and the carrier set includes one or more carriers, at least some of these carriers have power control parameters, and the other part of the carriers do not have power control parameters. The carriers with power control parameters can be transmitted according to the configured power, and the carriers without power control parameters allocate the transmission power in a certain way, instead of directly using their maximum power or the maximum power under the channel busy rate, to avoid the total transmission power of the carriers exceeding the maximum transmission power of the device. It can be understood that the carriers with power control parameters constitute the first carrier set, and the carriers without power control parameters constitute the second carrier set. At least one of the first carrier set and the second carrier set is not empty, that is, all carriers in the entire carrier set may have power control parameters, or all carriers may not have power control parameters, or may include carriers with power control parameters and carriers without power control parameters.

[0027] Among them, the power control parameter includes a first power parameter and / or a second power parameter, the first power parameter represents the power value for power control based on downlink path loss, and the second power parameter represents the power value for power control based on sidelink path loss. The power control parameters of the carriers in the first carrier set are provided or configured, the first power parameter can be the P0 value corresponding to the power control of the carrier based on downlink pathloss, that is, dl-P0-PSSCH-PSCCH, at this time dl-P0-PSSCH-PSCCH is the power control parameter provided or configured, and the second power parameter can be the P0 value corresponding to the power control of the carrier based on sidelink pathloss, that is, sl-P0-PSSCH-PSCCH, at this time sl-P0-PSSCH-PSCCH is the power control parameter provided or configured. The transmission power of the side link corresponding to the carrier in the first carrier set is also determined at least according to the path loss, where the path loss can be the path loss based on downlink pathloss, or the path loss based on sidelink pathloss. The transmission power of the side link corresponding to the carrier in the first carrier set can also be determined according to other parameters, which will be described in detail later.

[0028] In some embodiments, the transmit power of the carriers in the second carrier set may be determined by configuration, preconfiguration or allocation. Specifically, the power determination method further includes:

[0029] Determine the transmit power of the carriers in the second carrier set according to the first preset parameter;

[0030] or,

[0031] Determine the available transmit power of the device, and allocate the available transmit power to the carriers in the second carrier set according to the second preset parameter;

[0032] Among them, the available transmission power does not exceed the maximum transmission power of the device; the first preset parameter is the preset power, and the second preset parameter is determined according to at least one of the transmission number, weight value and transmission priority value of the side link corresponding to the carrier in the second carrier set.

[0033] The first preset parameter is the configuration or preconfigured transmit power of the carrier in the second carrier set, for example, the carrier can be set to transmit at the minimum power; by presetting the transmit power of the carrier in the second carrier set, the total transmit power of the carrier in the second carrier set is prevented from being too large. The second preset parameter is the transmit power obtained by allocating the carrier in the second carrier set, and for the available transmit power of the current device, the available transmit power is allocated to the carrier in the second carrier set. The available transmit power refers to the transmit power allocated to the second carrier set. When the carrier set includes both the first carrier set and the second carrier set, part of the maximum transmit power of the device is allocated to the carriers in the first carrier set, and the other part can be allocated in whole or in part to the carriers in the second carrier set. The part of the power allocated to the carriers in the second carrier set is the available transmit power. If the available transmit power is allocated entirely to the carriers in the second carrier set, the available transmit power can be allocated to each carrier according to the number of transmissions of the side links corresponding to the carriers in the second carrier set, the transmission priority value, etc. If the available transmit power is partially allocated to the carriers in the second carrier set, the minimum power of the carriers in the second carrier set can be determined according to the weight value and the transmission priority value, and the carriers in the second carrier set are transmitted according to the minimum power, so that the total transmit power of the carriers in the second carrier set does not exceed the available transmit power. When the carrier set only includes the second carrier set, the maximum transmit power of the device can be allocated to the carriers in the second carrier set. At this time, the available transmit power is the maximum transmit power of the device. The second preset parameter is determined according to the transmission quantity of the side link, or it can be determined according to the weight value, or it can be determined according to the transmission priority value, for example, it is determined based on the number of RBs (Resource Blocks) corresponding to the carrier, etc. This will be described in detail later.

[0034] The number of transmissions of the above-mentioned side link can be limited. When the number of transmissions of the side link is too large, it may also cause the total transmission power of the carrier to exceed the maximum transmission power of the device. Therefore, in some embodiments, the number of transmissions of the side link is determined by the device according to the transmission priority value of the side link and the maximum transmission power of the device. Specifically, refer to Figure 2 As shown, the power determination method also includes:

[0035] Step S310, counting the transmission powers of multiple edge links in ascending order of the transmission priority values ​​of the edge links to obtain a total power;

[0036] Step S320, determining the target total power within a limit not exceeding the maximum transmit power of the device, and determining the number of transmissions of the side link corresponding to the target total power.

[0037] Determine the transmission priority value of the edge link. The priority value corresponds to the priority of the edge link. The higher the priority of the edge link, the lower the priority value, and the lower the priority of the edge link, the higher the priority value. Based on this, sort the priority values ​​of the edge links in ascending order, and start to accumulate the transmission power of the edge links in ascending order, and make the accumulated total power not exceed the maximum transmission power of the device. According to the total power determined at this time, determine the number of accumulated edge links, and this number is the limit of the transmission number of the edge links.

[0038] In some embodiments, determining the transmission power of the side link according to the number of transmissions of the side link transmitted by the device in the aforementioned step S200 specifically includes determining the transmission power of several carriers according to a third preset parameter, or allocating the maximum transmission power of the device to several carriers according to a fourth preset parameter;

[0039] Among them, the third preset parameter is a preset power, and the fourth preset parameter is determined according to at least one of the transmission quantity, weight value and transmission priority value of the side links corresponding to several carriers.

[0040] In the case where the total transmission power of the carrier exceeds the maximum transmission power of the device, the transmission power is allocated to the carriers in the carrier set according to the maximum power of the device. Among them, the third preset parameter is the configured or preconfigured transmission power of the carrier in the carrier set. By presetting the transmission power of the carrier in the carrier set, the total transmission power of the carrier in the carrier set is avoided to be too large. The fourth preset parameter is the transmission power obtained by allocating the carriers in the carrier set, and the maximum transmission power of the device is allocated to the carriers in the carrier set. The fourth preset parameter is determined according to the number of transmissions of the side link, and can also be determined according to the weight value, and can also be determined according to the transmission priority value, for example, based on the number of resource blocks corresponding to the carrier, etc., which will be described in detail later.

[0041] The weight value in the above embodiment can be determined by at least one of the following methods:

[0042] The ratio of the total number of resource blocks of the physical edge link shared channels corresponding to all carriers in the carrier set to the number of resource blocks of the physical edge link shared channels corresponding to the carriers;

[0043] The ratio of the number of resource blocks in the resource pool corresponding to the carrier to the number of resource blocks in the physical side link shared channel corresponding to the carrier;

[0044] The ratio of the total number of resource blocks in the resource pool corresponding to all carriers in the carrier set to the number of resource blocks in the resource pool corresponding to the carrier.

[0045] In the first method mentioned above, the weight value of the carrier is determined according to the ratio of the number of RBs of the PSSCH of the carrier to the total number of RBs of the PSSCH of all carriers in the carrier set; in the second method mentioned above, the weight value of the carrier is determined according to the ratio of the number of RBs corresponding to the resource pool in the carrier to the number of RBs of the PSSCH of the carrier; in the third method mentioned above, the weight value of the carrier is determined according to the ratio of the total number of RBs of the PSSCH of all carriers in the carrier set to the number of RBs corresponding to the resource pool in the carrier.

[0046] Reference Figure 3 As shown, in some embodiments, the power determination method further includes:

[0047] Step S410, determining the maximum transmit power of the device;

[0048] Step S420: When the total transmission power of several carriers exceeds the maximum transmission power of the device, at least one side link is discarded according to the priority value of the side link.

[0049] The priority value of the side link is opposite to the priority. If the total transmission power of the carrier in the carrier set exceeds the maximum transmission power of the device, the side links with low priority can be discarded (that is, the side links with large priority values ​​can be discarded first), reducing the number of side links, thereby reducing the number of carriers carried by the device at the same time and reducing the total transmission power of the carrier.

[0050] Among them, refer to Figure 4 As shown, the transmission power of the carriers in the carrier set is determined according to the following method:

[0051] Step S210, determining a smaller value of a downlink transmission power and a side link transmission power of a carrier as a first power;

[0052] Step S220: determine the minimum value among the maximum power of the carrier, the maximum power of the carrier under the channel busy rate and the first power as the transmission power of the carrier in the carrier set.

[0053] Assuming that the carrier index is represented by c or f, we have:

[0054] P PSSCH,c (i) = min(P CMAX,c ,P MAX,CBR,c ,min(P PSSCH,D,c (i),P PSSCH,SL,C (i)))

[0055] Among them, P PSSCH,c (i) represents the power of transmitting PSSCH when the carrier does not transmit PSCCH at transmission opportunity i, that is, the transmission power of the carrier; P CMAX,c Indicates the maximum power of the carrier, P MAX,CBR,cIndicates the maximum power of the download wave at CBR (Channel Busy Ratio). If P MAX,CBR,c If not provided or configured, P MAX,CBR,C =P CMAX,c , P PSSCH,D,c (i) represents the transmission power based on downlink path loss, P PSSCH,SL,c (i) represents the transmission power based on the sidelink path loss.

[0056] That is to say, from P PSSCH,D,c (i) and P PSSCH,SL,c (i) Determine a smaller value, and then this smaller value and P CMAX,c and P MAX,CBR,c (i) Compare and determine a minimum value as the carrier transmission power.

[0057] The first downlink transmission power of the carrier in the first carrier set is determined according to the first power parameter, the path loss of the downlink and the number of resource blocks of the physical side link shared channel corresponding to the carrier. The first side link transmission power of the carrier in the first carrier set is determined according to the second power parameter, the path loss of the side link and the number of resource blocks of the physical side link shared channel corresponding to the carrier.

[0058] For the first downlink transmission power P PSSCH,D,c (i), d1-P0-PSSCH-PSCCH is provided or configured (ie, the current carrier is a carrier in the first carrier set), then:

[0059]

[0060] For the first side link transmission power P PSSCH,SL,c (i), sl-P0-PSSCH-PSCCH is provided or configured (i.e., the current carrier is a carrier in the first carrier set), then:

[0061]

[0062] Among them, P O,D,c Indicates the P0 value corresponding to the power control of the carrier based on downlink pathloss, that is, dl-P0-PSSCH-PSCCH, α D,c Indicates the compensation factor of the carrier based on downlink passloss, PL D,c Indicates that the intra-carrier path loss is based on the downlink passloss; P O,SL,cIndicates the P0 value corresponding to the power control of the carrier based on the sidelink pathloss, that is, sl-P0-PSSCH-PSCCH, α SL,c Indicates the compensation factor of the carrier based on the sidelink passloss, PL SL,c Indicates that the intra-carrier path loss is based on the sidelink passloss, and indicates the subcarrier spacing expansion factor. Indicates the number of RBs corresponding to PSSCH in the carrier.

[0063] The second downlink transmission power of the carrier in the second carrier set is the smaller value between the maximum power of the carrier and the maximum power of the carrier under the channel busy rate, and the second side link transmission power of the carrier in the second carrier set is the smaller value between the maximum power of the carrier and the second downlink transmission power.

[0064] For the second downlink transmission power P pSSCH,D,c (i) sl-P0-PSSCH-PSCCH is not provided or configured (i.e., the current carrier is a carrier in the second carrier set), then:

[0065] P PSSCH,D,c (i)=(P CMAX,c ,P MAX,CBR,c )

[0066] For the second side link transmission power P PSSCH,SL,c (i) sl-P0-PSSCH-PSCCH is not provided or configured (i.e., the current carrier is a carrier in the second carrier set), then:

[0067] P PSSCH,SL,c (i)=(P CMAX,c ,P PSSCH,D,c (i))

[0068] In some embodiments, when a device transmits through a physical side link shared channel and a physical side link control channel at the same time, the transmission power of the carrier in the carrier set includes the physical side link shared channel transmission power and the physical side link control channel transmission power, and the physical side link shared channel transmission power and the physical side link control channel transmission power are both determined based on the number of resource blocks of the physical side link shared channel corresponding to the carrier and the number of resource blocks of the physical side link control channel corresponding to the carrier.

[0069] When transmitting PSSCH and PSCCH at transmission opportunity i, the same formula P is used as above. PSSCH,c (i) = min(P CMAX,c ,P MAX,CBR,c ,min(P PSSCH,D,c (i),P PSSCH,SL,c(i))), then at the transmission opportunity, the power of PSSCH and the power of PSCCH transmitted by device i are respectively:

[0070]

[0071]

[0072] Among them, P PSSCH2,c (i) represents the power of transmitting PSSCH when the carrier transmits PSCCH at transmission opportunity i;

[0073] P PSCCH,c (i) represents the power of the carrier transmitting the PSCCH at transmission opportunity i;

[0074] Indicates the number of RBs corresponding to the PSCCH in the carrier.

[0075] In some embodiments, when a device transmits a sidelink-synchronization signaling block (S-SSB) through a physical sidelink broadcast channel (PSBCH), the transmission power of a carrier in a carrier set is the transmission power of the sidelink synchronization signaling block, and the transmission power of the sidelink synchronization signaling block is determined based on the maximum power of the carrier, the power value of the carrier for power control based on the downlink path loss, the number of resource blocks corresponding to the sidelink synchronization signaling block, and the path loss of the side link corresponding to the carrier.

[0076] In the case of transmitting S-SSB at transmission opportunity i, assuming that the carrier index is represented by c or f, then:

[0077]

[0078] Among them, P S-SSB,c (i) represents the power of the carrier transmitting S-SSB at transmission opportunity i;

[0079] Indicates the number of RBs corresponding to S-SSBs in the carrier;

[0080] P O,S-SSB,c (i) indicates the PO value of the carrier power control based on the downlink pathloss;

[0081] α S-SSB,c Indicates the compensation factor of the carrier based on the downlink pathloss.

[0082] PL cIndicates that the intra-carrier path loss is based on the downlink passloss;

[0083] It can be understood that when transmitting S-SSB at the above-mentioned transmission opportunity i, the transmission power of the synchronization reference carrier is given priority during power allocation or power reduction.

[0084] In summary, when performing carrier aggregation in a V2X scenario, the transmission power of the carrier or the transmission power of the side link carrying the carrier is determined by the maximum transmission power of the device, the number of carrier transmissions, path loss, etc., thereby realizing the determination, reduction or adjustment of the transmission power of the carrier in the carrier aggregation scenario, avoiding both limited transmission power and too low transmission power.

[0085] The power determination method of the present application is described in detail below through several specific examples.

[0086] The magnitude of the carrier power is expressed as follows:

[0087] Assuming that the carrier index is represented by c or f, at transmission time i, we have:

[0088] P PSSCH,c (i) = min(P CMAX,c ,P MAX,CBR,c ,min(P PSSCH,D,c (i),P PSSCH,SL,C (i)))

[0089] If dl-P0-PSSCH-PSCCH is provided or configured, the power based on downlink pathloss is:

[0090]

[0091] If dl-P0-PSSCH-PSCCH is not provided or configured, the power based on downlink pathloss is:

[0092] P PSSCH,D,c (i)=(P CMAX,c ,P MAX,CBR,c )

[0093] If sl-P0-PSSCH-PSCCH is provided or configured, the power based on the sidelink pathloss is:

[0094]

[0095] If sl-P0-PSSCH-PSCCH is not provided or configured, the power based on the sidelink pathloss is:

[0096] P PSSCH,SL,c (i)=(P CMAX,c ,P PSSCH,D,c (i))

[0097] Among them, P PSSCH,c (i) represents the power of transmitting PSSCH when the carrier does not transmit PSCCH at transmission opportunity i, that is, the transmission power of the carrier;

[0098] P CMAX,c Indicates the maximum power of the carrier, P CMAX,c (i) represents the maximum power of the carrier at transmission time i. If the maximum power of the carrier at different times is the same, i can be omitted;

[0099] P MAX,CBR,c Indicates the maximum power of the wave under CBR, P MAX,CBR,c (i) represents the maximum power of the carrier at the transmission time i under the CBR. If the maximum power of the carrier at different times is the same under the CBR, i can be omitted. MAX,CBR,c If not provided or not configured, P MAX,CBR,c =P CMAX,c ;

[0100] μ represents the subcarrier spacing expansion factor, Indicates the number of RBs corresponding to PSSCH in the carrier;

[0101] P O,D,c Indicates the P0 value corresponding to the power control of the carrier based on downlink path loss, that is, dl-P0-PSSCH-PSCCH, α D,c Indicates the compensation factor of the carrier based on downlink passloss, PL D,c Indicates that the intra-carrier path loss is based on the downlink passloss;

[0102] P O,SL,c Indicates the P0 value corresponding to the power control of the carrier based on the sidelink pathloss, that is, sl-P0-PSSCH-PSCCH, α SL,c Indicates the compensation factor of the carrier based on the sidelink passloss, PL SL,c Indicates that the intra-carrier path loss is based on the sidelink passloss.

[0103] Taking PSSCH power as an example, the carrier index c or f can be omitted. The carrier index omission indicates that the same type of parameter values ​​of different carriers are the same, or the carrier index omission indicates that the same type of parameter values ​​of the carrier and the user terminal are the same. In this case, the carrier index is omitted, which is expressed as:

[0104] P PSSCH (i) = min(P CMAX ,P MAX,CBR ,min(P PSSCH,D (i),P PSSCH,SL (i)))

[0105] The same is true for other formulas, that is, the carrier index c or f can be omitted and will not be repeated.

[0106] The following embodiments are described in accordance with the case where the carrier index c or f is omitted without additional mention, and the unit corresponding to the power is dBm by default, which will not be repeated.

[0107] Embodiment 1

[0108] When all carriers in the carrier set have dl-P0-PSSCH-PSCCH and / or sl-P0-PSSCH-PSCCH;

[0109] The PSSCH power is: P PSSCH (i) = min(P CMAX ,P MAX,CBR ,min(P PSSCH,D (i),P PSSCH,SL (i)))

[0110] For carriers with dl-P0-PSSCH-PSCCH and / or sl-P0-PSSCH-PSCCH, the set of these carriers is called the first carrier set. The transmit power of the carriers in the first carrier set uses the following formula:

[0111]

[0112]

[0113] If the total transmit power of multiple carriers of the UE exceeds the maximum transmit power P of the UE CMAX , UE determines N TxPSSCH To satisfy Among them, M j is the number of PSSCHs with priority value j, j starts from 1 indicating that the priority values ​​are in ascending order, and K is defined as satisfying The maximum value K of the UE is determined according to N Tx,PSSCH and the corresponding P PSSCH (i) Transmit PSSCH.

[0114] Above Indicates P PSSCH The linear value of (i), i.e.

[0115] Above Indicates P CMAX The linear value of

[0116] The larger the priority value of the edge link transmission, the lower the priority of the edge link transmission.

[0117] Embodiment 2

[0118] When all carriers in the carrier set have no dl-P0-PSSCH-PSCCH and sl-P0-PSSCH-PSCCH;

[0119] The PSSCH power is: P PSSCH (i) = min(P CMAX ,P MAX,cBR ,min(P PSSCH,D (i),P PSSCH,SL (i)))

[0120] For carriers without dl-P0-PSSCH-PSCCH and sl-P0-PSSCH-PSCCH, the set of these carriers is called the second carrier set. The transmit power of the carriers in the second carrier set uses the following formula:

[0121] P PSSCH,D (i)=(P CMAX ,P MAX,CBR )

[0122] P PSSCH,SL (i)=(P CMAX ,P PSSCH,D (i))

[0123] That is, the PSSCH power is equal to P PSSCH (i) = min(P CMAX ,P MAX,CBR ).

[0124] The above formula shows that each carrier uses a larger or maximum power, which will make the total transmit power of multiple carriers exceed the maximum power P of the UE. CMAX , at this time, power reduction is required to determine the PSSCH power. In order to avoid excessive reduction, the maximum power can be allocated to the carriers in the second carrier set by equal distribution or proportional weighting or priority value, and the corresponding power is the minimum power, or the minimum power is determined by configuration or pre-configuration.

[0125] Specifically, the power can be determined in one of the following ways:

[0126] (1) According to the formula P PSSCH (i) = P X -10log 10 N Tx,PSSCH Determine PSSCH transmit power;

[0127] Among them, P X =min(P CMAX ,P MAX,CBR ) or P X =P CMAX or P X =P MAX,CBR .

[0128] (2) According to the formula Determine PSSCH transmit power;

[0129] in, Indicates the total number of PSSCH RBs in all carriers.

[0130] (3) According to the formula Determine PSSCH transmit power;

[0131] in, Indicates the number of RBs corresponding to the resource pool in the carrier.

[0132] (4) According to the formula Determine PSSCH transmit power;

[0133] in, Indicates the total number of RBs in the resource pools of all carriers.

[0134] (5)P PSSCH (i) Determined by configuration or pre-configuration.

[0135] (6) Determine P Tx,PSSCH To satisfy Among them, M j is the number of PSSCHs with priority value j, j starts from 1 indicating that the priority values ​​are in ascending order, and K is defined as satisfying The maximum value K of the UE is determined according to N Tx,PSSCH and the corresponding P PSSCH (i) Transmit PSSCH.

[0136] Embodiment 3

[0137] When some carriers in the carrier set do not have dl-P0-PSSCH-PSCCH and sl-P0-PSSCH-PSCCH;

[0138] The PSSCH power is: P PSSCH (i) = min(P CMAX ,P MAX,CBR ,min(P PSSCH,D (i),P PSSCH,SL (i)))

[0139] For carriers with dl-P0-PSSCH-PSCCH and / or sl-P0-PSSCH-PSCCH, the set of these carriers is called the first carrier set. The transmit power of the carriers in the first carrier set uses the following formula:

[0140]

[0141]

[0142] For carriers without dl-P0-PSSCH-PSCCH and sl-P0-PSSCH-PSCCH, the set of these carriers is called the second carrier set. The transmit power of the carriers in the second carrier set uses the following formula:

[0143] P PSSCH,D (i)=(P CMAX ,P MAX,CBR )

[0144] P PSSCH,SL (i)=(P CMAX ,P PSSCH,D (i))

[0145] If the total transmit power of multiple carriers in the first carrier set and the second carrier set exceeds the maximum power P of the UE CMAX , UE determines N Tx,PSSCH To satisfy Among them, M j is the number of PSSCHs with priority value j, j starts from 1 indicating that the priority values ​​are in ascending order, and K is defined as satisfying The maximum value K of UE is determined according to N Tx,PSSCH and the corresponding P PSSCH (i) Transmit PSSCH.

[0146] or,

[0147] If the total transmit power of multiple carriers in the first carrier set and the second carrier set exceeds the maximum power P of the UE CMAX ,

[0148] UE determines N TxPSSCH To satisfy Among them, M jis the number of PSSCHs with priority value j, j starts from 1 indicating that the priority values ​​are in ascending order, and K is defined as satisfying The maximum value K of the UE is determined according to N Tx,PSSCH And corresponding to P in the first carrier set PSSCH,set1 (i) Transmitting PSSCH, corresponding to P in the second carrier set PSSCH,set2 (i) Transmitting PSSCH, the linear relationship of its power value satisfies:

[0149]

[0150] Specifically, the power of the carriers in the first carrier set is allocated according to the power control P0 value, and then the remaining power can be allocated to the carriers in the first carrier set by means of equal distribution, proportional weighting, and priority value. Assigned to a carrier in the second carrier set.

[0151] In the above formula, P PSSCH，set1 (i) represents the power of transmitting PSSCH when the carrier in the first carrier set does not transmit PSCCH at transmission opportunity i, P PSSCH，set2 (i) represents the power of transmitting PSSCH when the carrier in the second carrier set does not transmit PSCCH at transmission opportunity i, Indicates P PSSCH,set1 The linear value of (i), i.e. Indicates P PSSCH,set2 The linear value of (i), i.e.

[0152] Embodiment 4

[0153] Regardless of whether the carrier has dl-P0-PSSCH-PSCCH or sl-P0-PSSCH-PSCCH, the transmit power of the carrier is determined in one of the following ways:

[0154] If the total transmission power of multiple carriers in the carrier set exceeds the maximum power, the maximum power is allocated to the carriers in the carrier set by averaging or proportional weighting or priority value.

[0155] or,

[0156] If the total transmission power of multiple carriers in the carrier set exceeds the maximum power, the power of the carriers in the carrier set is determined by configuration or pre-configuration.

[0157] or,

[0158] If the total transmission power of multiple carriers in the carrier set exceeds the maximum power, the side link transmission with a large priority value is discarded.

[0159] Embodiment 5

[0160] Transmit PSCCH at transmission opportunity i;

[0161] Assuming the carrier index is represented by c or f, we have:

[0162] P PSSCH,c (i) = min(P CMAX,c ,P MAX,CBR,c ,min(P PSSCH,D,c (i),P PSSCH,SL,c (i))).

[0163] Then at the transmission opportunity, the power of PSSCH and PSCCH transmitted by device i are respectively:

[0164]

[0165]

[0166] Among them, P PSSCH2,c (i) represents the power of transmitting PSSCH when the carrier transmits PSCCH at transmission opportunity i;

[0167] P PSCCH,c (i) represents the power of the carrier transmitting the PSCCH at transmission opportunity i;

[0168] Indicates the number of RBs corresponding to the PSCCH in the carrier.

[0169] Embodiment 6

[0170] Transmit S-SSB at transmission opportunity i;

[0171] Assuming the carrier index is represented by c or f, we have:

[0172]

[0173] Among them, P S-SSB,c (i) represents the power of the carrier transmitting S-SSB at transmission opportunity i;

[0174] Indicates the number of RBs corresponding to S-SSBs in the carrier;

[0175] P O,S-SSB,c (i) indicates the PO value of the carrier power control based on the downlink pathloss;

[0176] α S-SSB,c Indicates the compensation factor of the carrier based on the downlink pathloss.

[0177] PL cIndicates that the intra-carrier path loss is based on the downlink passloss;

[0178] It can be understood that when S-SSB is transmitted at the above-mentioned transmission opportunity i, the transmission power of the synchronization reference carrier is given priority during power allocation or power reduction.

[0179] Embodiment 7

[0180] When some carriers in the carrier set do not have dl-P0-PSSCH-PSCCH and sl-P0-PSSCH-PSCCH;

[0181] The PSSCH power is: P PSSXH (i) = min(P CMAX ,P MAX,CBR ,min(P PSSCH,D (i),P PSSCH,SL (i)))

[0182] For carriers with dl-P0-PSSCH-PSCCH and / or sl-P0-PSSCH-PSCCH, the set of these carriers is called the first carrier set. The transmit power of the carriers in the first carrier set uses the following formula:

[0183]

[0184]

[0185] For carriers without dl-P0-PSSCH-PSCCH and sl-P0-PSSCH-PSCCH, the set of these carriers is called the second carrier set. The transmit power of the carriers in the second carrier set uses the following formula:

[0186] P PSSCH,D (i)=(P CMAX ,P MAX,CBR )

[0187] P PSSCH,SL (i)=(P CMAX ,P PSSCH,D (i))

[0188] If the total transmit power of multiple carriers in the first carrier set and the second carrier set exceeds the maximum power P of the UE CMAX , according to P in the first carrier set PSSCH,set1 (i) Transmitting PSSCH, according to P in the second carrier set pSSCH,set2 (i) Transmitting PSSCH, the linear relationship of its power value satisfies:

[0189]

[0190] Specifically, the power of the carriers in the first carrier set is allocated according to the power control P0 value, and then the remaining power can be allocated to the carriers in the first carrier set by means of equal distribution, proportional weighting, and priority value. Assigned to a carrier in the second carrier set.

[0191] In the above formula, P PSSCH,set1 (i) represents the power of transmitting PSSCH when the carrier in the first carrier set does not transmit PSCCH at transmission opportunity i, P PSSCH,set2 (i) represents the power of transmitting PSSCH when the carrier in the second carrier set does not transmit PSCCH at transmission opportunity i, Indicates P PSSCH,set1 The linear value of (i), i.e. Indicates P PSSCH,seT2 The linear value of (i), i.e.

[0192] It is worth noting that in the above embodiments 1, 2, 3 and 4, based on P PSSCH (i) Determine the transmit power of the carrier, and in Embodiments 3 and 7 based on P PSSCH,set1 (i) and P PSSCH,set2 (i) determining the transmission power of the first carrier set and the second carrier set, both of which refer to the power of transmitting PSSCH instead of transmitting PSCCH; in embodiments 1, 2, 3 and 4, when the carrier transmits PSCCH at transmission opportunity i, the above P PSSCH (i) can be used by P in Example 5 PSSCH2,c (i) is replaced (wherein the subscript c can be omitted); Similarly, the carrier is divided into a first carrier set and a second carrier set. In the fifth embodiment, when the carrier transmits PSCCH at transmission opportunity i, the transmission power of the carriers in the first carrier set and the second carrier set are P PSSCH2,c,set1 (i) and P PSSCH2,c,set2 (i), then in the third and seventh embodiments, when the carrier transmits PSCCH at transmission opportunity i, the above P PSSCH,set1 (i) and P PSSCH,set2 (i) can be P PSSCH2,c,set1 (i) and P PSSCH2,c,set2 (i) instead (where the subscript c can be omitted).

[0193] The above two replacement situations are applicable to embodiments 1, 2, 3 and 4, as well as embodiments 3 and 7, and are transformed into a situation where the carrier transmits PSCCH at transmission opportunity i. The corresponding formulas refer to embodiment 5 and will not be repeated here.

[0194] An embodiment of the present application also provides a power determination system, including a power determination device, which is used to determine the transmission power of the side link according to the number of transmissions of the side link transmitted by the device when the total transmission power of several carriers exceeds the maximum transmission power of the device.

[0195] An embodiment of the present application also provides a power determination device, comprising at least one processor and a memory for communicating with the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the aforementioned power determination method.

[0196] Reference Figure 5 , taking the control processor 1001 and the memory 1002 in the transmission device 1000 as an example that can be connected via a bus. The memory 1002, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 1002 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk memory, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 1002 may optionally include a memory remotely arranged relative to the control processor 1001, and these remote memories may be connected to the transmission device 1000 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0197] Those skilled in the art will understand that Figure 5 The device structure shown in the figure does not constitute a limitation on the transmission device 1000, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0198] The embodiment of the present application also provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are executed by one or more control processors, for example, Figure 5 The execution of one of the control processors 1001 in the embodiment may cause the one or more control processors to execute the power determination method in the above method embodiment, for example, executing the above described Figure 1 Steps S100 to S200 of the method, Figure 2 Steps S310 to S320 of the method, Figure 3 Steps S410 to S420 of the method and Figure 4 Method steps S210 to S220.

[0199] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0200] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0201] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A method for determining power, characterized in that: include: When the total transmission power of several carriers exceeds the maximum transmission power of the device, the transmission power of the side link is determined according to the transmission quantity of the side link transmitted by the device.

2. The power determination method according to claim 1, characterized in that: The several carriers constitute a carrier set, the carrier set includes a first carrier set and a second carrier set, at least one of the first carrier set and the second carrier set is not an empty set, the carriers in the first carrier set have power control parameters, and the carriers in the second carrier set do not have the power control parameters.

3. The power determination method according to claim 2, characterized in that: The power control parameter includes a first power parameter and / or a second power parameter, wherein the first power parameter represents a power value for power control based on a downlink path loss, and the second power parameter represents a power value for power control based on a side link path loss.

4. The power determination method according to claim 2, characterized in that: The transmission power of the side link corresponding to the carrier in the first carrier set is determined at least according to the path loss.

5. The power determination method according to claim 2, characterized in that: The power determination method further comprises: Determine the transmit power of the carriers in the second carrier set according to the first preset parameter; or, Determining an available transmit power of the device, and allocating the available transmit power to carriers in the second carrier set according to a second preset parameter; In which, the available transmission power does not exceed the maximum transmission power of the device; the first preset parameter is the preset power, and the second preset parameter is determined according to at least one of the transmission number, weight value and transmission priority value of the side link corresponding to the carrier in the second carrier set.

6. The power determination method according to claim 1, characterized in that: The transmission quantity of the side link is determined by the device according to the transmission priority value of the side link and the maximum transmission power of the device.

7. The power determination method according to claim 6, characterized in that: The power determination method further comprises: Counting the transmission powers of multiple side links in ascending order of the transmission priority values ​​of the side links to obtain a total power; The target power sum is determined so as not to exceed the maximum transmission power of the device, and the number of transmissions of the side link corresponding to the target power sum is determined.

8. The power determination method according to claim 1, characterized in that: The determining the transmission power of the side link according to the transmission quantity of the side link transmitted by the device includes: determining the transmit power of the plurality of carriers according to the third preset parameter, or allocating the maximum transmit power of the device to the plurality of carriers according to the fourth preset parameter; Among them, the third preset parameter is a preset power, and the fourth preset parameter is determined according to at least one of the transmission quantity, weight value and transmission priority value of the side links corresponding to the several carriers.

9. The power determination method according to claim 5 or 8, characterized in that: The weight value represents at least one of the following: The ratio of the total number of resource blocks of the physical side link shared channels corresponding to the plurality of carriers to the number of resource blocks of the physical side link shared channels corresponding to the carriers; The ratio of the number of resource blocks in the resource pool corresponding to the carrier to the number of resource blocks in the physical side link shared channel corresponding to the carrier; The ratio of the total number of resource blocks in the resource pools corresponding to the multiple carriers to the number of resource blocks in the resource pool corresponding to the carrier.

10. The power determination method according to claim 1, characterized in that: The power determination method further comprises: When the total transmission power of several carriers exceeds the maximum transmission power of the device, at least one of the side links is discarded according to the priority value of the side link.

11. The power determination method according to claim 2, characterized in that: The transmission power of the carriers in the carrier set is determined according to the following method: Determine a smaller value of a downlink transmission power and a sidelink transmission power of the carrier as a first power; The minimum value among the maximum power of the carrier, the maximum power of the carrier under the channel busy rate and the first power is determined as the transmission power of the carrier in the carrier set.

12. The power determination method according to claim 11, characterized in that: The first downlink transmission power of the carrier in the first carrier set is determined according to the first power parameter, the path loss of the downlink and the number of resource blocks of the physical side link shared channel corresponding to the carrier. The first side link transmission power of the carrier in the first carrier set is determined according to the second power parameter, the path loss of the side link and the number of resource blocks of the physical side link shared channel corresponding to the carrier.

13. The power determination method according to claim 11 or 12, characterized in that: The second downlink transmission power of the carrier in the second carrier set is the smaller value between the maximum power of the carrier and the maximum power of the carrier under the channel busy rate, and the second side link transmission power of the carrier in the second carrier set is the smaller value between the maximum power of the carrier and the second downlink transmission power.

14. The power determination method according to claim 1, characterized in that: In the case where the device transmits through the physical side link shared channel and the physical side link control channel at the same time, the transmission power of the carrier includes the physical side link shared channel transmission power and the physical side link control channel transmission power, and the physical side link shared channel transmission power and the physical side link control channel transmission power are both determined according to the number of resource blocks of the physical side link shared channel corresponding to the carrier and the number of resource blocks of the physical side link control channel corresponding to the carrier.

15. The power determination method according to claim 1, characterized in that: In the case where the device transmits a side link synchronization broadcast block through a physical side link broadcast channel, the transmission power of the carrier is the transmission power of the side link synchronization broadcast block, and the transmission power of the side link synchronization broadcast block is determined according to the maximum power of the carrier, the power value of the carrier for power control based on the downlink path loss, the number of resource blocks corresponding to the side link synchronization broadcast block, and the path loss of the side link corresponding to the carrier.

16. A power determination system, characterized in that: It comprises a power determination device, which is used to determine the transmission power of the side link according to the transmission number of the side link transmitted by the device when the total transmission power of several carriers exceeds the maximum transmission power of the device.

17. A power determination device, characterized in that: It includes at least one processor and a memory for communicating with the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the power determination method as described in any one of claims 1 to 15.

18. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the power determination method according to any one of claims 1 to 15.

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