Patent Publication Number: US-11659501-B2

Title: Method and device in node for wireless communication

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of application of U.S. Pat. No. 16/885,296, filed on May 28, 2020, and claims the priority benefit of Chinese Patent Application No. CN201910496193.7, filed on Jun. 10, 2019, the full disclosure of which is incorporated herein by reference. 
    
    
     BACKGROUD 
     Technical Field 
     The disclosure relates to transmission methods and devices in wireless communication systems, and in particular to a method and a device for selecting a transmit power of a feedback channel on a sidelink in Internet of Things (IoT) or Vehicle-to-Everything (V2X) systems. 
     Related Art 
     In view of V2X services developing rapidly, 3GPP has also started the initiation of standards formulation and researches under NR framework. At present, 3GPP has accomplished the work of formulation of requirements orienting 5G V2X services and has written it into standards TS22.886. 3GPP defines four use case groups for 5G V2X services, including Vehicles Platnooning, Extended Sensors, Advanced Driving and Remote Driving. In present V2X systems, terminal devices are supported to feed back, through a Physical Sidelink Feedback Channel (PSFCH), a Hybrid Automatic Repeat request Acknowledgement (HARQ-ACK) for a Physical Sidelink Shared Channel (PSSCH) on a sidelink. Meanwhile, in present NR V2X, it is also determined to take a pathloss on a sidelink into the determination of a transmit power of a channel on the sidelink. 
     SUMMARY 
     In NR V2X systems, one terminal will keep communication with multiple terminals at the same time, thus the one terminal will feed back HARQ-ACKs to multiple terminals at the same time; however, when the multiple HARQ-ACKs are transmitted in a same slot, a transmitter of the HARQ-ACKs needs to consider what size of transmit power is employed to transmit the multiple HARQ-ACKs. Since pathlosses between the receivers of these HARQ-ACKs and the terminal may be different, it is needed to consider how to determine a transmit power value of the multiple HARQ-ACKs through the multiple pathlosses. Meanwhile, it is also needed to avoid interference problems between the multiple HARQ-ACKs. 
     In view of the above new application scenarios and requirements, the disclosure provides a solution. It should be noted that the embodiments of the first node, second node and third node of the disclosure and the characteristics in the embodiments may be applied to the base station if no conflict is incurred, and the embodiments of the fourth node in the disclosure and the characteristics in the embodiments may be applied to terminals. Meanwhile, the embodiments of the disclosure and the characteristics in the embodiments may be mutually combined arbitrarily if no conflict is incurred. 
     The disclosure provides a method in a first node for wireless communication, wherein the method includes: 
     receiving a first signal; 
     receiving a second signal; and 
     transmitting a first information block and a second information block in a first time window. 
     Herein, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the above method has the following benefits: the first information block and the second information block are HARQ-ACKs for the first signal and the second signal respectively; when the first information block and the second information block are transmitted employing a same transmit power in one same time window, the transmit power is determined according to the configuration parameter and pathloss of the signal of higher priority, thereby ensuring the reception of HARQ-ACK of the signal of higher priority and avoiding interferences between frequency bands. 
     According to one aspect of the disclosure, the above method includes: 
     receiving a first signaling; and 
     receiving a second signaling. 
     Herein, the first signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the first signal, and the second signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the second signal; the first signaling includes the first field, and the second signaling includes the second field; the first signaling and the second signaling are both physical layer signalings. 
     According to one aspect of the disclosure, the above method is characterized in that: the first information block and the second information block are both transmitted in a candidate target channel, and a transmit power value of the candidate target channel is a first power value; or, the first information block and the second information block are transmitted in a first target channel and a second target channel respectively, and transmit power values of both the first target channel and the second target channel are the first power value. 
     According to one aspect of the disclosure, the above method is characterized in that: the method of employing the candidate target channel indicates that the first information block and the second information block are transmitted on one PSFCH through Code Division Multiplexing (CDM), thus the first information block and the second information block need to be transmitted with a uniform transmit power. 
     According to one aspect of the disclosure, the above method is further characterized in that: the method of employing the first target channel and the second target channel indicates that the first information block and the second information block are transmitted on two PSFCHs through Frequency Division Multiplexing (FDM); considering problems of frequency band leakage and Peak to Average Power Ratio (PAPR), the two PSFCHs also need to keep a same transmit power value. 
     In one embodiment, the above method has the following benefits: the scheme provided in the disclosure is applicable to both CDM and FDM. 
     According to one aspect of the disclosure, the above method is characterized in that: the phrase that the priority of the first signal and the priority of the second signal are used together for determining a first expected power value means that: when the priority of the first signal is higher than the priority of the second signal, a parameter set of a wireless link corresponding to the first signal is used for determining the first expected power value, and the parameter set of the wireless link corresponding to the first signal includes a pathloss of the wireless link corresponding to the first signal; when the priority of the first signal is lower than the priority of the second signal, a parameter set of a wireless link corresponding to the second signal is used for determining the first expected power value, and the parameter set of the wireless link corresponding to the second signal includes a pathloss of the wireless link corresponding to the second signal. 
     According to one aspect of the disclosure, the above method includes: 
     receiving a first reference signal; and 
     receiving a second reference signal. 
     Herein, the first reference signal is used for determining the pathloss of the wireless link corresponding to the first signal, and the second reference signal is used for determining the pathloss of the wireless link corresponding to the second signal. 
     According to one aspect of the disclosure, the above method includes: 
     receiving a third reference signal. 
     Herein, the third reference signal is used for determining a third reference power value, and the first power value is a smaller one of the first expected power value and the third reference power value; a transmitter of the third reference signal is non-colocated with a transmitter of the first signal, and the transmitter of the third reference signal is non-colocated with a transmitter of the second signal. 
     In one embodiment, the above method has the following benefits: the third reference signal is used for determining a pathloss of a cellular link; the above method ensures that the transmit power value on the sidelink does not cause interference to the cellular link. 
     The disclosure provides a method in a second node for wireless communication, wherein the method includes: 
     transmitting a first signal; and 
     receiving a first information block in a first time window. 
     Herein, the first information and a second information are both transmitted in the first time window, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     According to one aspect of the disclosure, the above method includes: 
     transmitting a first signaling. 
     Herein, the first signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the first signal, and the first signaling includes the first field; and the first signaling is a physical layer signaling. 
     According to one aspect of the disclosure, the above method is characterized in that: the first information block and the second information block are both transmitted in a candidate target channel, and a transmit power value of the candidate target channel is a first power value; or, the first information block and the second information block are transmitted in a first target channel and a second target channel respectively, and transmit power values of both the first target channel and the second target channel are the first power value. 
     According to one aspect of the disclosure, the above method is characterized in that: the phrase that the priority of the first signal and the priority of the second signal are used together for determining a first expected power value means that: when the priority of the first signal is higher than the priority of the second signal, a pathloss of a wireless link corresponding to the first signal is used for determining the first expected power value; when the priority of the first signal is not higher than the priority of the second signal, a pathloss of a wireless link corresponding to the second signal is used for determining the first expected power value. 
     According to one aspect of the disclosure, the above method includes: 
     transmitting a first reference signal. 
     Herein, the first reference signal is used for determining the pathloss of the wireless link corresponding to the first signal. 
     According to one aspect of the disclosure, the above method is characterized in that: a third reference signal is used for determining a first reference power value, and the first power value is a smaller one of the first expected power value and the first reference power value; a transmitter of the third reference signal is non-colocated with the second node, and the transmitter of the third reference signal is non-colocated with a transmitter of the second signal. 
     The disclosure provides a method in a third node for wireless communication, wherein the method includes: 
     transmitting a second signal; and 
     receiving a second information block in a first time window. 
     Herein, a first information and the second information are both transmitted in the first time window, the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     According to one aspect of the disclosure, the above method includes: 
     transmitting a second signaling. 
     Herein, the second signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the second signal, and the second signaling includes the second field; and the second signaling is a physical layer signaling. 
     According to one aspect of the disclosure, the above method is characterized in that: the first information block and the second information block are both transmitted in a candidate target channel, and a transmit power value of the candidate target channel is a first power value; or, the first information block and the second information block are transmitted in a first target channel and a second target channel respectively, and transmit power values of both the first target channel and the second target channel are the first power value. 
     According to one aspect of the disclosure, the above method is characterized in that: the phrase that the priority of the first signal and the priority of the second signal are used together for determining a first expected power value means that: when the priority of the first signal is higher than the priority of the second signal, a pathloss of a wireless link corresponding to the first signal is used for determining the first expected power value; when the priority of the first signal is not higher than the priority of the second signal, a pathloss of a wireless link corresponding to the second signal is used for determining the first expected power value. 
     According to one aspect of the disclosure, the above method includes: 
     transmitting a second reference signal. 
     Herein, the second reference signal is used for determining the pathloss of the wireless link corresponding to the second signal. 
     According to one aspect of the disclosure, the above method is characterized in that: a third reference signal is used for determining a first reference power value, and the first power value is a smaller one of the first expected power value and the first reference power value; a transmitter of the third reference signal is non-colocated with the third node, and the transmitter of the third reference signal is non-colocated with a transmitter of the first signal. 
     The disclosure provides a method in a fourth node for wireless communication, wherein the method includes: 
     transmitting a third reference signal. 
     Herein, the third reference signal is used for determining a third reference power value, and a first power value is a smaller one of a first expected power value and the third reference power value; the first power value is both transmit power values of physical layer channels carrying a first information block and a second information block; the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a priority of the first signal and a priority of the second signal are used together for determining the first expected power value, and the first power value is not greater than the first expected power value; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; the first field and the second field are both transmitted in a physical layer channel. 
     The disclosure provides a first node for wireless communication, wherein the method includes: 
     a first receiver, to receive a first signal; 
     a second receiver, to receive a second signal; and 
     a first transmitter, to transmit a first information block and a second information block in a first time window. 
     Herein, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     The disclosure provides a second node for wireless communication, wherein the method includes: 
     a second transmitter, to transmit a first signal; and 
     a third receiver, to receive a first information block in a first time window. 
     Herein, the first information and a second information are both transmitted in the first time window, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     The disclosure provides a third node for wireless communication, wherein the method includes: 
     a third transmitter, to transmit a second signal; and 
     a fourth receiver, to receive a second information block in a first time window. 
     Herein, a first information and the second information are both transmitted in the first time window, the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     The disclosure provides a fourth node for wireless communication, wherein the method includes: 
     a fourth transmitter, to transmit a third reference signal. 
     Herein, the third reference signal is used for determining a third reference power value, and a first power value is a smaller one of a first expected power value and the third reference power value; the first power value is both transmit power values of physical layer channels carrying a first information block and a second information block; the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a priority of the first signal and a priority of the second signal are used together for determining the first expected power value, and the first power value is not greater than the first expected power value; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, compared with conventional schemes, the disclosure has the following advantages. 
     The first information block and the second information block are HARQ-ACKs for the first signal and the second signal respectively; when the first information block and the second information block are transmitted employing a same transmit power in one same time window, the transmit power is determined according to the configuration parameter and pathloss of the signal of higher priority, thereby ensuring the reception of HARQ-ACK of the signal of higher priority and avoiding interferences between frequency bands. 
     The scheme provided in the disclosure is applicable to both scenarios that multiple HARQ-ACKs are CDM and FDM. 
     The third reference signal is used for determining a pathloss of a cellular link; the above method ensures that the transmit power value on the sidelink does not cause interference to the cellular link. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Other features, purposes and advantages of the disclosure will become more apparent from the detailed description of non-restrictive embodiments taken in conjunction with the following drawings. 
         FIG.  1    is a flowchart of processing of a first node according to one embodiment of the disclosure. 
         FIG.  2    is a diagram illustrating a network architecture according to one embodiment of the disclosure. 
         FIG.  3    is a diagram illustrating an embodiment of a radio protocol architecture of a user plane and a control plane according to one embodiment of the disclosure. 
         FIG.  4    is a diagram illustrating a first communication equipment and a second communication equipment according to one embodiment of the disclosure. 
         FIG.  5    is a flowchart of a first signaling according to one embodiment of the disclosure. 
         FIG.  6    is a flowchart of a first reference signal according to one embodiment of the disclosure. 
         FIG.  7    is a diagram illustrating a first time window according to one embodiment of the disclosure. 
         FIG.  8    is a diagram illustrating a candidate target channel according to one embodiment of the disclosure. 
         FIG.  9    is a diagram illustrating a first target channel and a second target channel according to one embodiment of the disclosure. 
         FIG.  10    is a diagram illustrating an application scenario according to one embodiment of the disclosure. 
         FIG.  11    is a diagram illustrating an application scenario according to another embodiment of the disclosure. 
         FIG.  12    is a structure block diagram illustrating a first node according to one embodiment of the disclosure. 
         FIG.  13    is a structure block diagram illustrating a second node according to one embodiment of the disclosure. 
         FIG.  14    is a structure block diagram illustrating a third node according to one embodiment of the disclosure. 
         FIG.  15    is a structure block diagram illustrating a fourth node according to one embodiment of the disclosure. 
         FIG.  16    is a flowchart of determining a first power value according to one embodiment of the disclosure. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     The technical scheme of the disclosure is described below in further detail in conjunction with the drawings. It should be noted that the embodiments in the disclosure and the characteristics of the embodiments may be mutually combined arbitrarily if no conflict is incurred. 
     Embodiment 1 
     Embodiment 1 illustrates a flowchart of processing of a first node, as shown in  FIG.  1   . In  100  shown in  FIG.  1   , each box represents one step. In Embodiment 1, the first node in the disclosure receives a first signal in S 101 , receives a second signal in S 102 , and transmits a first information block and a second information block in a first time window in S 103 . 
     In Embodiment 1, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, a physical layer channel occupied by the first signal includes a PSSCH. 
     In one embodiment, a physical layer channel occupied by the second signal includes a PSSCH. 
     In one embodiment, the first signal is transmitted in a first time unit, the second signal is transmitted in a second time unit, the first time unit and the second time unit are orthogonal in time domain. 
     In one embodiment, the first signal is transmitted in a first time unit set, the second signal is transmitted in a second time unit set, the first time unit set includes K 1  time units, the second time unit set includes K 2  time units, at least one of the K 1  time units is different from at least one of the K 2  time units, or at least one of the K 2  time units is different from at least one of the K 1  time units; the K 1  and the K 2  are both positive integers greater than 1. 
     In one embodiment, time domain resources occupied by the first signal are not completely overlapping with time domain resources occupied by the second signal. 
     In one embodiment, the first information block is a HARQ-ACK for the first signal. 
     In one embodiment, the second information block is a HARQ-ACK for the second signal. 
     In one embodiment, a physical layer channel carrying the first information block includes a PSFCH. 
     In one embodiment, a physical layer channel carrying the second information block includes a PSFCH. 
     In one embodiment, the first information block and the second information block are transmitted in one same PSFCH. 
     In one subembodiment, the first information block and the second information block are CDM in one same PSFCH. 
     In one subembodiment, the first information block and the second information block are multiplexing through different orthogonal sequences in one same PSFCH. 
     In one subembodiment, the first information block and the second information block are generated by different orthogonal sequences in one same PSFCH. 
     In one embodiment, the first information block and the second information block are transmitted in two PSFCHs respectively. 
     In one subembodiment, a PSFCH carrying the first information block and a PSFCH carrying the second information block are FDM in the first time window. 
     In one embodiment, the time unit in the disclosure refers to a slot, or the time unit in the disclosure refers to a subframe, or the time unit in the disclosure refers to a subslot. 
     In one embodiment, the first time window includes one time unit only. 
     In one embodiment, the first time window includes M consecutive multicarrier symbols, and the M is a positive integer less than 14. 
     In one embodiment, the first time window includes multiple time units. 
     In one embodiment, the first field is a Priority field in Sidelink Control Information (SCI). 
     In one embodiment, the first field includes 3 bits. 
     In one embodiment, the second field is a Priority field in SCI. 
     In one embodiment, the second field includes 3 bits. 
     In one embodiment, the first field indicates a ProSe Per-Packet Priority (PPPP) corresponding to the first signal. 
     In one embodiment, the first field is used for determining a PPPP corresponding to the first signal. 
     In one embodiment, the first field indicates a ProSe Per-Packet Reliability (PPPR) corresponding to the first signal. 
     In one embodiment, the first field is used for determining a PPPR corresponding to the first signal. 
     In one embodiment, the second field indicates a PPPP corresponding to the second signal. 
     In one embodiment, the second field indicates a PPPR corresponding to the second signal. 
     In one embodiment, the second field is used for determining a PPPP corresponding to the second signal. 
     In one embodiment, the second field is used for determining a PPPR corresponding to the second signal. 
     In one embodiment, the first signal is transmitted on a sidelink. 
     In one embodiment, the second signal is transmitted on a sidelink. 
     In one embodiment, the first information block is a feedback for a data channel on a sidelink. 
     In one embodiment, the second information block is a feedback for a data channel on a sidelink. 
     In one embodiment, the first information block further includes Channel State Information (CSI) for a first link, and the first link refers to a wireless link between the second node and the first node in the disclosure. 
     In one embodiment, the second information block further includes a CSI for a second link, and the second link refers to a wireless link between the third node and the first node in the disclosure. 
     In one embodiment, the first signal is a wireless radio. 
     In one embodiment, the first signal is baseband signal. 
     In one embodiment, the second signal is a wireless radio. 
     In one embodiment, the second signal is baseband signal. 
     In one embodiment, the priority of the first signal is higher than the priority of the second signal, and the first field is less than the second field. 
     In one embodiment, the priority of the first signal is lower than the priority of the second signal, and the first field is greater than the second field. 
     In one embodiment, the first power value is in unit of dBm, or the first power value is in unit of milliwatt. 
     In one embodiment, the first expected power value is in unit of dBm, or the first expected power value is in unit of milliwatt. 
     In one embodiment, the first signal is transmitted on a first link, the second signal is transmitted on a second link, and the phrase that the priority of the first signal and the priority of the second signal are used together for determining a first expected power value means that: a parameter set of a link corresponding to the signal of higher priority between the first signal and the second signal is used for determining the first expected power value. 
     In one subembodiment, the priority of the first signal is higher than the priority of the second signal, the parameter set of the first link is used for determining the first expected power value, and the parameter set includes a pathloss of the first link. 
     In one subembodiment, the priority of the first signal is lower than the priority of the second signal, the parameter set of the second link is used for determining the first expected power value, and the parameter set includes a pathloss of the second link. 
     In one subembodiment, the priority of the first signal is equal to the priority of the second signal, the parameter set of the first link is used for determining a first reference power value, the parameter set of the second link is used for determining a second reference power value, and a bigger one of the first reference power value and the second reference power value is set as the first expected power value. 
     In one subembodiment, the priority of the first signal is equal to the priority of the second signal, and the first node determines autonomously that the parameter set of the first link or the parameter set of the second link is used for determining the first expected power value. 
     In one embodiment, the physical layer channel carrying the first information block and the second information block occupies a positive integer number of Physical Resource Block(s) (PRB(s)) in frequency domain. 
     In one embodiment, the first signal is used for transmitting one Transport Block (TB). 
     In one embodiment, the second signal is used for transmitting one TB. 
     Embodiment 2 
     Embodiment 2 illustrates an example of a diagram of a network architecture, as shown in  FIG.  2   . 
       FIG.  2    is a diagram illustrating a network architecture  200  of 5G NR, Long-Term Evolution (LTE) and Long-Term Evolution Advanced (LTE-A) systems. The 5G NR or LTE network architecture  200  may be called an Evolved Packet System (EPS)  200  or some other appropriate terms. The EPS  200  may include one or more UEs  201 , one UE  241  in sidelink communication with the UE  201 , one UE  242  in sidelink communication with the UE  201 , a Next Generation-Radio Access Network (NG-RAN)  202 , an Evolved Packet Core/5G-Core Network (EPC/5G-CN)  210 , a Home Subscriber Server (HSS)  220  and an Internet service  230 . The EPS may be interconnected with other access networks. For simple description, the entities/interfaces are not shown. As shown in  FIG.  2   , the EPS provides packet switching services. Those skilled in the art are easy to understand that various concepts presented throughout the disclosure can be extended to networks providing circuit switching services or other cellular networks. The NG-RAN includes a NR node (gNB)  203  and other gNBs  204 . The gNB  203  provides UE  201  oriented user plane and control plane protocol terminations. The gNB  203  may be connected to other gNBs  204  via an Xn interface (for example, backhaul). The gNB  203  may be called a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP or some other appropriate terms. The gNB  203  provides an access point of the EPC/5G-CN  210  for the UE  201 . Examples of UE  201  include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptop computers, Personal Digital Assistants (PDAs), satellite radios, non-territorial network base station communications, satellite mobile communications, Global Positioning Systems (GPSs), multimedia devices, video devices, digital audio player (for example, MP3 players), cameras, games consoles, unmanned aerial vehicles, air vehicles, narrow-band physical network equipment, machine-type communication equipment, land vehicles, automobiles, wearable equipment, or any other devices having similar functions. Those skilled in the art may also call the UE  201  a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a radio communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user proxy, a mobile client, a client, or some other appropriate terms. The gNB  203  is connected to the EPC/5G-CN  210  via an S 1 /NG interface. The EPC/5G-CN  210  includes a Mobility Management Entity/Authentication Management Field/User Plane Function (MME/AMF/UPF)  211 , other MMEs/AMFs/UPFs  214 , a Service Gateway (S-GW)  212  and a Packet Data Network Gateway (P-GW)  213 . The MME/AMF/UPF  211  is a control node for processing a signaling between the UE  201  and the EPC/5G-CN  210 . Generally, the MME/AMF/UPF  211  provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through the S-GW  212 . The S-GW  212  is connected to the P-GW  213 . The P-GW  213  provides UE IP address allocation and other functions. The P-GW  213  is connected to the Internet service  230 . The Internet service  230  includes IP services corresponding to operators, specifically including internet, intranet, IP Multimedia Subsystems (IP IMSs) and PS Streaming Services (PSSs). 
     In one embodiment, the UE  201  corresponds to the first node in the disclosure. 
     In one embodiment, the UE  241  corresponds to the second node in the disclosure. 
     In one embodiment, the UE  242  corresponds to the third node in the disclosure. 
     In one embodiment, the gNB  203  corresponds to the fourth node in the disclosure. 
     In one embodiment, the air interface between the UE  201  and the gNB  203  is a Uu interface. 
     In one embodiment, the air interface between the UE  201  and the UE  241  is PC-5 interface. 
     In one embodiment, the air interface between the UE  201  and the UE  242  is PC-5 interface. 
     In one embodiment, the wireless link between the UE 201  and the gNB  203  is a cellular link. 
     In one embodiment, the wireless link between the UE 201  and the UE  241  is a sidelink. 
     In one embodiment, the wireless link between the UE 201  and the UE  242  is a sidelink. 
     In one embodiment, the second node in the disclosure is one terminal within the coverage of the gNB  203 . 
     In one embodiment, the second node in the disclosure is one terminal out of the coverage of the gNB  203 . 
     In one embodiment, the third node in the disclosure is one terminal within the coverage of the gNB  203 . 
     In one embodiment, the third node in the disclosure is one terminal out of the coverage of the gNB  203 . 
     In one embodiment, the first node and the second node belong to one V2X pair. 
     In one embodiment, unicast V2X communication is performed between the first node and the second node, or groupcast V2X communication is performed between the first node and the second node. 
     In one embodiment, the first node and the third node belong to one terminal group. 
     In one embodiment, unicast V2X communication is performed between the first node and the third node, or groupcast V2X communication is performed between the first node and the third node. 
     In one embodiment, the first node is one car. 
     In one embodiment, the second node is one car. 
     In one embodiment, the third node is one car. 
     In one embodiment, the first node is one vehicle. 
     In one embodiment, the second node is one vehicle. 
     In one embodiment, the third node is one car. 
     In one embodiment, the fourth node is one base station. 
     In one embodiment, the first node is one Road Side Unit (RSU). 
     In one embodiment, the first node is a group header of one terminal group. 
     Embodiment 3 
     Embodiment 3 illustrates a diagram of an embodiment of a radio protocol architecture of a user plane and a control plane according to the disclosure, as shown in  FIG.  3   .  FIG.  3    is a diagram illustrating an embodiment of a radio protocol architecture of a user plane  350  and a control plane  300 . In  FIG.  3   , the radio protocol architecture of a control plane  300  between a first communication node equipment (UE, gNB or RSU in V2X) and a second communication node equipment (gNB, UE or RSU in V2X) or between two UEs is illustrated by three layers, which are a Layer  1 , a Layer  2  and a Layer  3  respectively. The Layer  1  (L 1  layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L 1  layer will be referred to herein as the PHY  301 . The Layer  2  (L 2  layer)  305  is above the PHY  301 , and is responsible for the links between the first communication node equipment and the second communication node equipment and between two UEs. The L 2  Layer  305  includes a Medium Access Control (MAC) sublayer  302 , a Radio Link Control (RLC) sublayer  303 , and a Packet Data Convergence Protocol (PDCP) sublayer  304 , which are terminated at the second communication node equipment. The PDCP sublayer  304  provides multiplexing between different radio bearers and logical channels. The PDCP sublayer  304  also provides security by encrypting packets and provides support for handover of the first communication node equipment between second communication node equipments. The RLC sublayer  303  provides segmentation and reassembling of higher-layer packets, retransmission of lost packets, and reordering of lost packets to as to compensate for out-of-order reception due to HARQ. The MAC sublayer  302  provides multiplexing between logical channels and transport channels. The MAC sublayer  302  is also responsible for allocating various radio resources (i.e., resource blocks) in one cell among the first communication node equipment. The MAC sublayer  302  is also in charge of HARQ operations. The RRC sublayer  306  in the Layer  3  (L 3  layer) in the control plane  300  is responsible for acquiring radio resources (i.e. radio bearers) and configuring lower layers using an RRC signaling between the second communication node equipment and the first communication node equipment. The radio protocol architecture of the user plane  350  includes a Layer  1  (L 1  layer) and a Layer  2  (L 2  layer); the radio protocol architecture for the first communication node equipment and the second communication node equipment in the user plane  350  on the PHY  351 , the PDCP sublayer  354  in the L 2  Layer  355 , the RLC sublayer  353  in the L 2  Layer  355  and the MAC sublayer  352  in the L 2  Layer  355  is substantially the same as the radio protocol architecture on corresponding layers and sublayers in the control plane  300 , with the exception that the PDCP sublayer  354  also provides header compression for higher-layer packets so as to reduce radio transmission overheads. The L 2  Layer  355  in the user plane  350  further includes a Service Data Adaptation Protocol (SDAP) sublayer  356 ; the SDAP sublayer  356  is in charge of mappings between QoS flows and Data Radio Bearers (DRBs), so as to support diversification of services. Although not shown, the first communication node equipment may include several higher layers above the L 2  Layer  355 , including a network layer (i.e. IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end (i.e. a peer UE, a server, etc.) of the connection. 
     In one embodiment, the radio protocol architecture shown in  FIG.  3    is applicable to the first node in the disclosure. 
     In one embodiment, the radio protocol architecture shown in  FIG.  3    is applicable to the second node in the disclosure. 
     In one embodiment, the radio protocol architecture shown in  FIG.  3    is applicable to the third node in the disclosure. 
     In one embodiment, the radio protocol architecture shown in  FIG.  3    is applicable to the fourth node in the disclosure. 
     In one embodiment, the first signal is generated on the PHY  301  or the PHY  351 . 
     In one embodiment, the first signal is generated on the MAC  352  or the MAC  302 . 
     In one embodiment, the second signal is generated on the PHY  301  or the PHY  351 . 
     In one embodiment, the second signal is generated on the MAC  352  or the MAC  302 . 
     In one embodiment, the first signaling is generated on the PHY  301  or the PHY  351 . 
     In one embodiment, the second signaling is generated on the PHY  301  or the PHY  351 . 
     In one embodiment, the first reference signal is generated on the PHY  301  or the PHY  351 . 
     In one embodiment, the second reference signal is generated on the PHY  301  or the PHY  351 . 
     In one embodiment, the third reference signal is generated on the PHY  301  or the PHY  351 . 
     Embodiment 4 
     Embodiment 4 illustrates a diagram of a first communication equipment and a second communication equipment according to the disclosure, as shown in  FIG.  4   .  FIG.  4    is a block diagram of a first communication equipment  450  and a second communication equipment  410  that are in communication with each other in an access network. 
     The first communication equipment  450  includes a controller/processor  459 , a memory  460 , a data source  467 , a transmitting processor  468 , a receiving processor  456 , a multi-antenna transmitting processor  457 , a multi-antenna receiving processor  458 , a transmitter/receiver  454  and an antenna  452 . 
     The second communication equipment  410  includes a controller/processor  475 , a memory  476 , a receiving processor  470 , a transmitting processor  416 , a multi-antenna receiving processor  472 , a multi-antenna transmitting processor  471 , a transmitter/receiver  418  and an antenna  420 . 
     In a transmission from the second communication equipment  410  to the first communication equipment  450 , at the second communication equipment  410 , a higher-layer packet from a core network is provided to the controller/processor  475 . The controller/processor  475  provides functions of Layer  2 . In the transmission from the second communication equipment  410  to the first communication equipment  450 , the controller/processor  475  provides header compression, encryption, packet segmentation and reordering, multiplexing between a logical channel and a transport channel, and a radio resource allocation for the first communication equipment  450  based on various priority metrics. The controller/processor  475  is also in charge of retransmission of lost packets, and signalings to the first communication equipment  450 . The transmitting processor  416  and the multi-antenna transmitting processor  471  perform various signal processing functions used for Layer  1  (that is, PHY). The transmitting processor  416  performs encoding and interleaving so as to ensure FEC (Forward Error Correction) at the first communication equipment  450  and mappings to signal clusters corresponding to different modulation schemes (i.e., BPSK, QPSK, M-PSK M-QAM, etc.). The multi-antenna transmitting processor  471  processes the encoded and modulated symbols with digital spatial precoding (including precoding based on codebook and precoding based on non-codebook) and beamforming to generate one or more spatial streams. The transmitting processor  416  subsequently maps each spatial stream into a subcarrier to be multiplexed with a reference signal (i.e., pilot) in time domain and/or frequency domain, and then processes it with Inverse Fast Fourier Transform (IFFT) to generate a physical channel carrying time-domain multicarrier symbol streams. Then, the multi-antenna transmitting processor  471  processes the time-domain multicarrier symbol streams with transmitting analog precoding/beamforming. Each transmitter  418  converts a baseband multicarrier symbol stream provided by the multi-antenna transmitting processor  471  into a radio frequency stream and then provides it to different antennas  420 . 
     In a transmission from the second communication equipment  410  to the first communication equipment  450 , at the first communication equipment  450 , each receiver  454  receives a signal via the corresponding antenna  452 . Each receiver  454  recovers the information modulated to the RF carrier and converts the radio frequency stream into a baseband multicarrier symbol stream to provide to the receiving processor  456 . The receiving processor  456  and the multi-antenna receiving processor  458  perform various signal processing functions of Layer  1 . The multi-antenna receiving processor  458  processes the baseband multicarrier symbol stream coming from the receiver  454  with receiving analog precoding/beamforming. The receiving processor  458  converts the baseband multicarrier symbol stream subjected to the receiving analog precoding/beamforming operation from time domain into frequency domain using FFT (Fast Fourier Transform). In frequency domain, a physical layer data signal and a reference signal are demultiplexed by the receiving processor  456 , wherein the reference signal is used for channel estimation, and the data signal is subjected to multi-antenna detection in the multi-antenna receiving processor  458  to recover any spatial stream targeting the first communication equipment  450 . Symbols on each spatial stream are demodulated and recovered in the receiving processor  456  to generate a soft decision. Then, the receiving processor  456  decodes and de-interleaves the soft decision to recover the higher-layer data and control signal on the physical channel transmitted by the second communication equipment  410 . Next, the higher-layer data and control signal are provided to the controller/processor  459 . The controller/processor  459  performs functions of Layer  2 . The controller/processor  459  may be connected to the memory  460  that stores program codes and data. The memory  460  may be called a computer readable media. In the transmission from the second communication equipment  410  to the first communication equipment  450 , the controller/processor  459  provides multiplexing between the transport channel and the logical channel, packet reassembling, decryption, header decompression, and control signal processing so as to recover the higher-layer packet coming from the core network. The higher-layer packet is then provided to all protocol layers above Layer  2 , or various control signals can be provided to Layer  3  for processing. 
     In a transmission from the first communication equipment  450  to the second communication equipment  410 , at the first communication equipment  450 , the data source  467  provides a higher-layer packet to the controller/processor  459 . The data source  467  illustrates all protocol layers above the L 2  layer. Similar as the transmitting function of the second communication equipment  410  described in the transmission from the second communication equipment  410  to the first communication equipment  450 , the controller/processor  459  provides header compression, encryption, packet segmentation and reordering, and multiplexing between a logical channel and a transport channel based on radio resource allocation so as to provide the functions of L 2  layer used for the control plane and user plane. The controller/processor  459  is also in charge of retransmission of lost packets, and signalings to the second communication equipment  410 . The transmitting processor  468  conducts modulation mapping and channel encoding processing; the multi-antenna transmitting processor  457  performs digital multi-antenna spatial precoding (including precoding based on codebook and precoding based on non-codebook) and beaming processing; and subsequently, the transmitting processor  468  modulates the generated spatial streams into a multicarrier/single-carrier symbol stream, which is subjected to an analog precoding/beamforming operation in the multi-antenna transmitting processor  457  and then is provided to different antennas  452  via the transmitter  454 . Each transmitter  452  first converts the baseband symbol stream provided by the multi-antenna transmitting processor  457  into a radio frequency symbol stream and then provides the radio frequency symbol stream to the antenna  452 . 
     In a transmission from the first communication equipment  450  to the second communication equipment  410 , the function of the second communication equipment  410  is similar as the receiving function of the first communication equipment  450  described in the transmission from second communication equipment  410  to the first communication equipment  450 . Each receiver  418  receives a radio frequency signal via the corresponding antenna  420 , converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna receiving processor  472  and the receiving processor  470 . The receiving processor  470  and the multi-antenna receiving processor  472  together provide functions of Layer  1 . The controller/processor  475  provides functions of Layer  2 . The controller/processor  475  may be connected to the memory  476  that stores program codes and data. The memory  476  may be called a computer readable media. In the transmission from the first communication equipment  450  to the second communication equipment  410 , the controller/processor  475  provides de-multiplexing between the transport channel and the logical channel, packet reassembling, decryption, header decompression, and control signal processing so as to recover higher-layer packets coming from the UE  450 . The higher-layer packet, coming from the controller/processor  475 , may be provided to the core network. 
     In one embodiment, the first communication equipment  450  includes at least one processor and at least one memory. The at least one memory includes computer program codes. The at least one memory and the computer program codes are configured to be used in collaboration with the at least one processor. The first communication equipment  450  at least receives a first signal, receives a second signal, and transmits a first information block and a second information block in a first time window; the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the first communication equipment  450  includes a memory that stores a computer readable instruction program. The computer readable instruction program generates an action when executed by at least one processor. The action includes: receiving a first signal, receiving a second signal, and transmitting a first information block and a second information block in a first time window; the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the second communication equipment  410  includes at least one processor and at least one memory. The at least one memory includes computer program codes. The at least one memory and the computer program codes are configured to be used in collaboration with the at least one processor. The second communication equipment  410  at least transmits a first signal, and receives a first information block in a first time window; the first information and a second information are both transmitted in the first time window, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the second communication equipment  410  includes a memory that stores a computer readable instruction program. The computer readable instruction program generates an action when executed by at least one processor. The action includes: transmitting a first signal, and receiving a first information block in a first time window; the first information and a second information are both transmitted in the first time window, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the second communication equipment  410  includes at least one processor and at least one memory. The at least one memory includes computer program codes. The at least one memory and the computer program codes are configured to be used in collaboration with the at least one processor. The second communication equipment  410  at least transmits a second signal, and receives a second information block in a first time window; a first information and the second information are both transmitted in the first time window, the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the second communication equipment  410  includes a memory that stores a computer readable instruction program. The computer readable instruction program generates an action when executed by at least one processor. The action includes: transmitting a second signal, and receiving a second information block in a first time window; a first information and the second information are both transmitted in the first time window, the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the second communication equipment  410  includes at least one processor and at least one memory. The at least one memory includes computer program codes. The at least one memory and the computer program codes are configured to be used in collaboration with the at least one processor. The second communication equipment  410  at least transmits a third reference signal; the third reference signal is used for determining a third reference power value, and a first power value is a smaller one of a first expected power value and the third reference power value; the first power value is both transmit power values of physical layer channels carrying a first information block and a second information block; the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a priority of the first signal and a priority of the second signal are used together for determining the first expected power value, and the first power value is not greater than the first expected power value; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the second communication equipment  410  includes a memory that stores a computer readable instruction program. The computer readable instruction program generates an action when executed by at least one processor. The action includes: transmitting a third reference signal; the third reference signal is used for determining a third reference power value, and a first power value is a smaller one of a first expected power value and the third reference power value; the first power value is both transmit power values of physical layer channels carrying a first information block and a second information block; the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a priority of the first signal and a priority of the second signal are used together for determining the first expected power value, and the first power value is not greater than the first expected power value; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the first communication equipment  450  corresponds to the first node in the disclosure. 
     In one embodiment, the second communication equipment  410  corresponds to the second node in the disclosure. 
     In one embodiment, the second communication equipment  410  corresponds to the third node in the disclosure. 
     In one embodiment, the second communication equipment  410  corresponds to the fourth node in the disclosure. 
     In one embodiment, the first communication equipment  450  is one UE. 
     In one embodiment, the second communication equipment  410  is one UE. 
     In one embodiment, at least one of the antenna  452 , the receiver  454 , the multiantenna receiving processor  458 , the receiving processor  456  or the controller/processor  459  is used for receiving a first signal; and at least one of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  is used for transmitting a first signal. 
     In one embodiment, at least one of the antenna  452 , the receiver  454 , the multiantenna receiving processor  458 , the receiving processor  456  or the controller/processor  459  is used for receiving a second signal; and at least one of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  is used for transmitting a second signal. 
     In one embodiment, at least one of the antenna  452 , the transmitter  454 , the multiantenna transmitting processor  457 , the transmitting processor  468  or the controller/processor  459  is used for transmitting a first information block and a second information block in a first time window. 
     In one embodiment, at least one of the antenna  420 , the receiver  418 , the multiantenna receiving processor  472 , the receiving processor  470  or the controller/processor  475  is used for receiving a first information block in a first time window. 
     In one embodiment, at least one of the antenna  420 , the receiver  418 , the multiantenna receiving processor  472 , the receiving processor  470  or the controller/processor  475  is used for receiving a second information block in a first time window. 
     In one embodiment, at least one of the antenna  452 , the receiver  454 , the multiantenna receiving processor  458 , the receiving processor  456  or the controller/processor  459  is used for receiving a first signaling; and at least one of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  is used for transmitting a first signaling. 
     In one embodiment, at least one of the antenna  452 , the receiver  454 , the multiantenna receiving processor  458 , the receiving processor  456  or the controller/processor  459  is used for receiving a second signaling; and at least one of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  is used for transmitting a second signaling. 
     In one embodiment, at least one of the antenna  452 , the receiver  454 , the multiantenna receiving processor  458 , the receiving processor  456  or the controller/processor  459  is used for receiving a first reference signal; and at least one of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  is used for transmitting a first reference signal. 
     In one embodiment, at least one of the antenna  452 , the receiver  454 , the multiantenna receiving processor  458 , the receiving processor  456  or the controller/processor  459  is used for receiving a second reference signal; and at least one of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  is used for transmitting a second reference signal. 
     In one embodiment, at least one of the antenna  452 , the receiver  454 , the multiantenna receiving processor  458 , the receiving processor  456  or the controller/processor  459  is used for receiving a third reference signal; and at least one of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  is used for transmitting a third reference signal. 
     Embodiment 5 
     Embodiment 5 illustrates a flowchart of a first signaling, as shown in  FIG.  5   . In  FIG.  5   , a first node U 1  performs communication with a second node U 2  through a sidelink, and the first node U 1  performs communication with a third node U 3  through a sidelink. 
     The first node U 1  receives a first signaling in S 10 , receives a second signaling in S 11 , receives a first signal in S 12 , receives a second signal in S 13 , and transmits a first information block and a second information block in a first time window in S 14 . 
     The second node U 2  transmits a first signaling in S 20 , transmits a first signal in S 21 , and receives a first information block in a first time window in S 22 . 
     The third node U 3  transmits a second signaling in S 30 , transmits a second signal in S 31 , and receives a second information block in a first time window in S 32 . 
     In Embodiment 5, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel; the first signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the first signal, and the second signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the second signal; the first signaling includes the first field, and the second signaling includes the second field; the first signaling and the second signaling are both physical layer signalings. 
     In one embodiment, the first signaling is an SCI. 
     In one embodiment, the second signaling is an SCI. 
     In one embodiment, the first signaling is used for scheduling the first signal. 
     In one embodiment, the second signaling is used for scheduling the second signal. 
     In one embodiment, the first signaling is used for indicating at least one of a Modulation and Coding Status (MC S) or a Redundancy Version (RV) employed by the first signal. 
     In one embodiment, the first signaling is used for indicating a HARQ process number employed by the first signal. 
     In one embodiment, the second signaling is used for indicating at least one of an MCS or an RV employed by the second signal. 
     In one embodiment, the second signaling is used for indicating a HARQ process number employed by the second signal. 
     In one embodiment, the first signaling indicates time domain resources occupied by the first signal, and the time domain resources occupied by the first signal are used for determining time domain resources occupied by the first information block. 
     In one embodiment, the second signaling indicates time domain resources occupied by the second signal, and the time domain resources occupied by the second signal are used for determining time domain resources occupied by the second information block. 
     In one embodiment, the first signaling is used for indicating time domain resources occupied by the first information block. 
     In one embodiment, the second signaling is used for indicating time domain resources occupied by the second information block. 
     In one embodiment, the first information block and the second information block are both transmitted in a candidate target channel, and a transmit power value of the candidate target channel is the first power value; or the first information block and the second information block are transmitted in a first target channel and a second target channel respectively, and transmit power values of both the first target channel and the second target channel are the first power value. 
     In one subembodiment, the candidate target channel is a PSFCH. 
     In one subembodiment, the first target channel is a PSFCH. 
     In one subembodiment, the second target channel is a PSFCH. 
     In one subembodiment, the first target channel and the second target channel are FDM. 
     In one subembodiment, at least one given multicarrier symbol is occupied by both the first target channel and the second target channel. 
     In one embodiment, the multicarrier symbol in the disclosure is an Orthogonal Frequency Division Multiplexing (OFDM) symbol. 
     In one embodiment, the multicarrier symbol in the disclosure is a Single-Carrier Frequency Division Multiple Access (SC-FDMA) symbol. 
     In one embodiment, the multicarrier symbol in the disclosure is a Filter Bank Multi Carrier (FBMC) symbol. 
     In one embodiment, the multicarrier symbol in the disclosure is an OFDM symbol including a Cyclic Prefix (CP). 
     In one embodiment, the multicarrier symbol in the disclosure is one of Discrete Fourier Transform Spreading Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) symbols including a CP. 
     In one embodiment, the phrase that the priority of the first signal and the priority of the second signal are used together for determining a first expected power value means that: when the priority of the first signal is higher than the priority of the second signal, a parameter set of a wireless link corresponding to the first signal is used for determining the first expected power value, and the parameter set of the wireless link corresponding to the first signal includes a pathloss of the wireless link corresponding to the first signal; when the priority of the first signal is lower than the priority of the second signal, a parameter set of a wireless link corresponding to the second signal is used for determining the first expected power value, and the parameter set of the wireless link corresponding to the second signal includes a pathloss of the wireless link corresponding to the second signal. 
     In one embodiment, when the priority of the first signal is equal to the priority of the second signal, the parameter set of a wireless link corresponding to the first signal is used for determining a first reference power value, the parameter set of a wireless link corresponding to second first signal is used for determining a second reference power value, and a bigger one of the first reference power value and the second reference power value is set as the first expected power value. 
     In one embodiment, when the priority of the first signal is equal to the priority of the second signal, and the first node determines autonomously that the parameter set of a wireless link corresponding to the first signal or the parameter set of a wireless link corresponding to second signal is used for determining the first expected power value. 
     In one embodiment, a wireless link corresponding to the first signal corresponds to a first link, and the first link is a wireless link from the first node to the second node in the disclosure. 
     In one embodiment, a wireless link corresponding to the second signal corresponds to a second link, and the second link is a wireless link from the first node to the third node in the disclosure. 
     In one embodiment, the parameter set of a wireless link corresponding to the first signal is a first parameter set; the first parameter set includes at least one of a first target power value P 1  or a first compensation factor α 1 ; the P 1  is in unit of dBm, or the P 1  is in unit of milliwatt; and the α 1  is a real number not less than 0 but not greater than 1. 
     In one embodiment, the parameter set of a wireless link corresponding to the second signal is a second parameter set; the second parameter set includes at least one of a second target power value P 2  or a second compensation factor α 2 ; the P 2  is in unit of dBm, or the P 2  is in unit of milliwatt; and the α 2  is a real number not less than 0 but not greater than 1. 
     In one embodiment, a pathloss of the first link is PL 1 , a pathloss of the second link is PL 2 , the PL 1  is in unit of dB, and the PL 2  is in unit of dB. 
     In one embodiment, the first expected power value is equal to P E , the P E  is determined through the following formula, where the parameter M is related to a bandwidth of frequency domain resources occupied by a physical channel carrying the first information block and(or) the second information block.
 
 P   E =10 log( M )+ P   i +α i   ·PL   i  
 
     In one subembodiment, the priority of the first signal is higher than the priority of the second signal, the P i  is equal to P i , the α i  is equal to α 1 , and the PL i  is equal to PL 1 . 
     In one subembodiment, the priority of the first signal is lower than the priority of the second signal, the P i  is equal to P 2 , the α i  is equal to α 2 , and the PL i  is equal to PL 2    
     In one subembodiment, the priority of the first signal is equal to the priority of the second signal, the first node selects autonomously one from P 1  and P 2  as P i , selects a corresponding one from α 1  and α 2  as α i , selects a corresponding one from PL 1  and PL 2  as PL i , and calculates the first expected power according to the above formula. 
     In one subembodiment, the priority of the first signal is equal to the priority of the second signal, the first node calculates a first reference power value with P 1 , α 1  and PL 1  according to the above formula, and calculates a second reference power value with P 2 , α 2  and PL 2  according to the above formula, and a bigger one of the first reference power value and the second reference power value is set as the first expected power value. 
     Embodiment 6 
     Embodiment 6 illustrates a flowchart of a first reference signal, as shown in  FIG.  6   . In  FIG.  6   , a first node U 4  performs communication with a second node U 5  through a sidelink, the first node U 4  performs communication with a third node U 6  through a sidelink, and the first node U 4  performs communication with a fourth node U 7  through a cellular link. 
     The first node U 4  receives a third reference signal in S 40 , receives a first reference signal in S 41  and receives a second reference signal in S 42 . 
     The second node U 5  transmits a first reference signal in S 50 . 
     The third node U 6  transmits a second reference signal in S 60 . 
     The fourth node U 7  transmits a third reference signal in S 70 . 
     In Embodiment 6, the first reference signal is used for determining a pathloss of a wireless link corresponding to the first signal in the disclosure, and the second reference signal is used for determining a pathloss of a wireless link corresponding to the second signal in the disclosure; the third reference signal is used for determining a third reference power value, the first power value in the disclosure is a smaller one of the first expected power value and the third reference power value; a transmitter of the third reference signal is non-colocated with a transmitter of the first signal, and the transmitter of the third reference signal is non-colocated with a transmitter of the second signal. 
     In one embodiment, the first reference signal is a Channel State Information Reference Signal (CSI-RS) on a sidelink. 
     In one embodiment, the second reference signal is a CSI-RS on a sidelink. 
     In one embodiment, the first signal includes the first reference signal. 
     In one embodiment, the second signal includes the second reference signal. 
     In one embodiment, the first reference signal includes a CSI-RS from the second node to the first node. 
     In one embodiment, the second reference signal includes a CSI-RS from the third node to the first node. 
     In one embodiment, the third reference signal is transmitted on a third link, and the third link is a wireless link between the fourth node U 7  and the first node U 4 . 
     In one embodiment, the third reference signal is a CSI-RS on a Uu link. 
     In one embodiment, a transmitter of the third reference signal is a base station. 
     In one embodiment, a transmitter of the first signal is one terminal, and a transmitter of the second signal is another terminal. 
     In one embodiment, the third reference signal is used for determining a third pathloss, and the third pathloss is used for determining the third reference power value. 
     In one embodiment, the third link corresponds to a third parameter set, the third parameter set includes at least one of a third target power value P 3  or a third compensation factor α 3 , the third reference power value P Uu  is determined through the following formula, where a parameter M is related to a bandwidth of frequency domain resources occupied by a physical channel carrying the first information block and(or) the second information block; PL 3  is the third pathloss, the P 3  is in unit of dBm, or the P 3  is in unit of milliwatt; and the α 3  is a real number not less than 0 but not greater than 1.
 
 P   Uu =10log( M )+P 3 +α 3   ·PL   3  
 
     In one embodiment, the phrase that a transmitter of the third reference signal is non-colocated with a transmitter of the first signal means that: a transmitter of the third reference signal and a transmitter of the first signal are located at different geographical positions. 
     In one embodiment, the phrase that a transmitter of the third reference signal is non-colocated with a transmitter of the first signal means that: a transmitter of the third reference signal and a transmitter of the first signal have no wired connection therebetween. 
     In one embodiment, the phrase that a transmitter of the third reference signal is non-colocated with a transmitter of the second signal means that: a transmitter of the third reference signal and a transmitter of the second signal are located at different geographical positions. 
     In one embodiment, the phrase that a transmitter of the third reference signal is non-colocated with a transmitter of the second signal means that: a transmitter of the third reference signal and a transmitter of the second signal have no wired connection therebetween. 
     Embodiment 7 
     Embodiment 7 illustrates a diagram of a first time window, as shown in  FIG.  6   . In  FIG.  6   , the first node in the disclosure receives a first signaling and a first signal, receives a second signaling and a second signal, and transmits a first information block and a second information block in a first time window; the dark arrow in  FIG.  7    represents scheduling, and the white arrow represents feedback. 
     In one embodiment, the first signaling and the first signal are transmitted in one same time unit. 
     In one embodiment, the first signaling and the first signal are FDM. 
     In one embodiment, the second signaling and the second signal are transmitted in one same time unit. 
     In one embodiment, the secod signaling and the second signal are FDM. 
     In one embodiment, the first signaling is used for indicating the first time window. 
     In one embodiment, the second signaling is used for indicating the first time window. 
     In one embodiment, a time interval from a time unit occupied by the first signal to the first time window is fixed, or a time interval from a time unit occupied by the first signal to the first time window is configured through a higher layer signaling. 
     In one embodiment, a time interval from a time unit occupied by the second signal to the first time window is fixed, or a time interval from a time unit occupied by the second signal to the first time window is configured through a higher layer signaling. 
     Embodiment 8 
     Embodiment 8 illustrates a diagram of a candidate target channel, as shown in  FIG.  8   . In  FIG.  8   , a first information block and a second information block together occupy the candidate target channel, a bold-line parallelogram and a dash-line parallelogram correspond to an air interface resource set occupied by the first information block and an air interface resource set occupied by the second information block respectively; the candidate target channel includes M 1  air interface resource sets; the first information block and the second information block occupy two different air interface resource sets among the M 1  air interface resource sets respectively; and the M 1  is a positive integer greater than 1. 
     In one embodiment, the M 1  air interface resource sets correspond to M 1  code domain resources or M 1  multiaccess signatures respectively. 
     In one embodiment, the M 1  air interface resource sets correspond to M 1  orthogonal sequences respectively. 
     In one embodiment, any two of the M 1  air interface resource sets correspond to orthogonal code domain resources or multiaccess signatures. 
     In one embodiment, at least two of the M 1  air interface resource sets correspond to orthogonal code domain resources or multiaccess signatures. 
     In one embodiment, the candidate target channel occupies one or more time units in time domain, and the candidate target channel occupies a subcarrier corresponding to a positive integer umber of PRB(s) in frequency domain. 
     In one embodiment, the first information block is generated by a first sequence, the second information block is generated by a second sequence, and the first sequence is orthogonal to the second sequence. 
     In one subembodiment, a second node employs a second identifier, the second identifier is used for determining the first sequence; a third node employs a third identifier, the third identifier is used for determining the second sequence. 
     Embodiment 9 
     Embodiment 9 illustrates a diagram of a first target channel and a second target channel, as shown in  FIG.  9   . In  FIG.  9   , the first target channel and the second target channel are both PSFCHs; the PSFCH corresponding to the first target channel is used for feeding back a PSSCH coming from the second node only, and the PSFCH corresponding to the second target channel is used for feeding back a PSSCH coming from the third node only. 
     In one embodiment, the first target channel and the second target channel occupy a same number of PRB(s) in frequency domain. 
     In one embodiment, the first target channel and the second target channel occupy a same number of subcarrier(s) in frequency domain. 
     In one embodiment, the first target channel and the second target channel are FDM. 
     In one embodiment, the first target channel and the first signal in the disclosure occupy same frequency domain resources. 
     In one embodiment, the second target channel and the second signal in the disclosure occupy same frequency domain resources. 
     In one embodiment, the first signaling is used for indicating frequency domain resources occupied by the first target channel. 
     In one embodiment, the second signaling is used for indicating frequency domain resources occupied by the second target channel. 
     In one embodiment, frequency domain resources occupied by the first signal are used for indicating frequency domain resources occupied by the first target channel. 
     In one embodiment, frequency domain resources occupied by the second signal are used for indicating frequency domain resources occupied by the second target channel. 
     In one embodiment, a time interval between the first time window and time domain resources occupied by the first signal is fixed. 
     In one embodiment, a time interval between the first time window and time domain resources occupied by the second signal is fixed. 
     In one embodiment, the first signal and the second signal are transmitted in a same time unit. 
     Embodiment 10 
     Embodiment 10 illustrates a diagram of an application scenario, as shown in  FIG.  10   . In  FIG.  10   , a priority of the first signal and a priority of the second signal are used together for determining a target parameter set, and the target parameter set is used for determining the first expected power value; in  FIG.  10   , a first link corresponds to a wireless link between the first node and the second node in the disclosure, and a second link corresponds to a wireless link between the first node and the third node in the disclosure; the first link corresponds to a first parameter set, and the second link corresponds to a second parameter set; a relationship between the priority of the first signal and the priority of the second signal is used for determining that the target parameter set is the first parameter set or the second parameter set. 
     In one embodiment, the priority of the first signal is higher than the priority of the second signal, and the target parameter set is the first parameter set. 
     In one embodiment, the priority of the first signal is lower than the priority of the second signal, and the target parameter set is the second parameter set. 
     In one embodiment, the priority of the first signal is equal to the priority of the second signal, and the first node determines autonomously that the first parameter set or the second parameter is selected as the target parameter set to determine the first expected power value. 
     In one embodiment, the priority of the first signal is equal to the priority of the second signal, the first node selects between the first parameter set and the second parameter set a parameter set which can obtain a bigger transmit power value as the target parameter set, and determines the first expected power value using the target parameter set. 
     Embodiment 11 
     Embodiment 11 illustrates a diagram of another application scenario, as shown in  FIG.  11   . In  FIG.  11   , a third link corresponds to a wireless link between the first node and the fourth node in the disclosure, and a side link corresponds to a wireless link between the first node and the second node/third node; the third link corresponds to a third parameter set, and the third link is used for determining a third reference power value; the first power value in the disclosure is equal to a smaller one of the third reference power value and the first expected power value. 
     Embodiment 12 
     Embodiment 12 illustrates a structure block diagram of a first node, as shown in  FIG.  12   . In  FIG.  12   , the first node  1200  includes a first receiver  1201 , a second receiver  1202  and a first transmitter  1203 . 
     The first receiver  1201  receives a first signal. 
     The second receiver  1202  receives a second signal. 
     The first transmitter  1203  transmits a first information block and a second information block in a first time window. 
     In Embodiment 12, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the first receiver  1201  receives a first signaling, and the second receiver  1202  receives a second signaling; the first signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the first signal, and the second signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the second signal; the first signaling includes the first field, and the second signaling includes the second field; the first signaling and the second signaling are both physical layer signalings. 
     In one embodiment, the first information block and the second information block are both transmitted in a candidate target channel, and a transmit power value of the candidate target channel is a first power value; or, the first information block and the second information block are transmitted in a first target channel and a second target channel respectively, and transmit power values of both the first target channel and the second target channel are the first power value. 
     In one embodiment, the phrase that the priority of the first signal and the priority of the second signal are used together for determining a first expected power value means that: when the priority of the first signal is higher than the priority of the second signal, a parameter set of a wireless link corresponding to the first signal is used for determining the first expected power value, and the parameter set of the wireless link corresponding to the first signal includes a pathloss of the wireless link corresponding to the first signal; when the priority of the first signal is lower than the priority of the second signal, a parameter set of a wireless link corresponding to the second signal is used for determining the first expected power value, and the parameter set of the wireless link corresponding to the second signal includes a pathloss of the wireless link corresponding to the second signal. 
     In one embodiment, the first receiver  1201  receives a first reference signal, the second receiver  1202  receives a second reference signal, the first reference signal is used for determining the pathloss of the wireless link corresponding to the first signal, and the second reference signal is used for determining the pathloss of the wireless link corresponding to the second signal. 
     In one embodiment, the first receiver  1201  receives a third reference signal; the third reference signal is used for determining a third reference power value, and the first power value is a smaller one of the first expected power value and the third reference power value; a transmitter of the third reference signal is non-colocated with a transmitter of the first signal, and the transmitter of the third reference signal is non-colocated with a transmitter of the second signal. 
     In one embodiment, the first receiver  1201  includes at least the former four of the antenna  452 , the receiver  454 , the multiantenna receiving processor  458 , the receiving processor  456  or the controller/processor  459  illustrated in Embodiment 4. 
     In one embodiment, the second receiver  1202  includes at least the former four of the antenna  452 , the receiver  454 , the multiantenna receiving processor  458 , the receiving processor  456  or the controller/processor  459  illustrated in Embodiment 4. 
     In one embodiment, the first transmitter  1203  includes at least the former four of the antenna  452 , the transmitter  454 , the multiantenna transmitting processor  457 , the transmitting processor  468  or the controller/processor  459  illustrated in Embodiment 4. 
     Embodiment 13 
     Embodiment 13 illustrates a structure block diagram of a second node, as shown in  FIG.  13   . In  FIG.  13   , the second node  1300  includes a second transmitter  1301  and a third receiver  1302 . 
     The second transmitter  1301  transmits a first signal. 
     The third receiver  1302  receives a first information block in a first time window. 
     In Embodiment 13, the first information and a second information are both transmitted in the first time window, the first information block is used for determining whether the first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the second transmitter  1301  transmits a first signaling, the first signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the first signal, and the first signaling includes the first field; and the first signaling is a physical layer signaling. 
     In one embodiment, the first information block and the second information block are both transmitted in a candidate target channel, and a transmit power value of the candidate target channel is a first power value; or, the first information block and the second information block are transmitted in a first target channel and a second target channel respectively, and transmit power values of both the first target channel and the second target channel are the first power value. 
     In one embodiment, the phrase that the priority of the first signal and the priority of the second signal are used together for determining a first expected power value means that: when the priority of the first signal is higher than the priority of the second signal, a pathloss of a wireless link corresponding to the first signal is used for determining the first expected power value; when the priority of the first signal is not higher than the priority of the second signal, a pathloss of a wireless link corresponding to the second signal is used for determining the first expected power value. 
     In one embodiment, the second transmitter  1301  transmits a first reference signal; the first reference signal is used for determining the pathloss of the wireless link corresponding to the first signal. 
     In one embodiment, a third reference signal is used for determining a first reference power value, and the first power value is a smaller one of the first expected power value and the first reference power value; a transmitter of the third reference signal is non-colocated with the third node, and the transmitter of the third reference signal is non-colocated with a transmitter of the first signal. 
     In one embodiment, the second transmitter  1301  includes at least the former four of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  illustrated in Embodiment 4. 
     In one embodiment, the third receiver  1302  includes at least the former four of the antenna  420 , the receiver  418 , the multiantenna receiving processor  472 , the receiving processor  470  or the controller/processor  475  illustrated in Embodiment 4. 
     Embodiment 14 
     Embodiment 14 illustrates a structure block diagram of a third node, as shown in  FIG.  14   . In  FIG.  14   , the third node  1400  includes a third transmitter  1401  and a fourth receiver  1402 . 
     The third transmitter  1401  transmits a second signal. 
     The fourth receiver  1402  receives a second information block in a first time window. 
     In Embodiment 14, a first information and the second information are both transmitted in the first time window, the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether the second signal is correctly received; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; transmit power values of physical layer channels carrying the first information block and the second information block are both a first power value; the priority of the first signal and the priority of the second signal are used together for determining a first expected power value, and the first power value is not greater than the first expected power value; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the third transmitter  1401  transmits a second signaling, the second signaling is used for determining at least one of time domain resources or frequency domain resources occupied by the second signal, and the second signaling includes the second field; and the second signaling is a physical layer signaling. 
     In one embodiment, the first information block and the second information block are both transmitted in a candidate target channel, and a transmit power value of the candidate target channel is a first power value; or, the first information block and the second information block are transmitted in a first target channel and a second target channel respectively, and transmit power values of both the first target channel and the second target channel are the first power value. 
     In one embodiment, the phrase that the priority of the first signal and the priority of the second signal are used together for determining a first expected power value means that: when the priority of the first signal is higher than the priority of the second signal, a pathloss of a wireless link corresponding to the first signal is used for determining the first expected power value; when the priority of the first signal is not higher than the priority of the second signal, a pathloss of a wireless link corresponding to the second signal is used for determining the first expected power value. 
     In one embodiment, the third transmitter  1401  transmits a second reference signal; the second reference signal is used for determining the pathloss of the wireless link corresponding to the second signal. 
     In one embodiment, a third reference signal is used for determining a first reference power value, and the first power value is a smaller one of the first expected power value and the first reference power value; a transmitter of the third reference signal is non-colocated with the third node, and the transmitter of the third reference signal is non-colocated with a transmitter of the first signal. 
     In one embodiment, the third transmitter  1401  includes at least the former four of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  illustrated in Embodiment 4. 
     In one embodiment, the fourth receiver  1402  includes at least the former four of the antenna  420 , the receiver  418 , the multiantenna receiving processor  472 , the receiving processor  470  or the controller/processor  475  illustrated in Embodiment 4. 
     Embodiment 15 
     Embodiment 15 illustrates a structure block diagram of a fourth node, as shown in  FIG.  15   . In  FIG.  15   , the fourth node  1500  includes a fourth transmitter  1501 . 
     The fourth transmitter  1501  transmits a third reference signal. 
     In Embodiment 15, the third reference signal is used for determining a third reference power value, and a first power value is a smaller one of a first expected power value and the third reference power value; the first power value is both transmit power values of physical layer channels carrying a first information block and a second information block; the first information block is used for determining whether a first signal is correctly received, and the second information block is used for determining whether a second signal is correctly received; a priority of the first signal and a priority of the second signal are used together for determining the first expected power value, and the first power value is not greater than the first expected power value; a first field and a second field are used for indicating priorities of the first signal and the second signal respectively; the first field and the second field are both transmitted in a physical layer channel. 
     In one embodiment, the fourth transmitter  1501  includes at least the former four of the antenna  420 , the transmitter  418 , the multiantenna transmitting processor  471 , the transmitting processor  416  or the controller/processor  475  illustrated in Embodiment 4. 
     Embodiment 16 
     Embodiment 16 illustrates a flowchart of determining a first power value according to the disclosure, as shown in  FIG.  16   . The first node performs the following operations to determine the first power value. 
     In S 1601 : comparing a priority of a first signal with a priority of a second signal; when the priority of the first signal is greater than the priority of the second signal, going to S 1602 ; when the priority of the first signal is lower than the priority of the second signal, going to S 1603 ; when the priority of the first signal is equal to the priority of the second signal, going to S 1604 . 
     In S 1602 : determining a first expected power value according to a parameter set of a wireless link corresponding to the first signal. 
     In S 1603 : determining a first expected power value according to a parameter set of a wireless link corresponding to the second signal. 
     In S 1604 : determining a first expected power value according to a first rule. 
     In S 1605 : determining a third reference power value according to a third reference signal. 
     In S 1606 : comparing the third reference power value with the first expected power value; when the third reference power value is greater than the first expected power value, going to S 1607 ; when the third reference power value is not greater than the first expected power value, going to S 1608 ; 
     In S 1607 : setting the first expected power value as the first power value. 
     In S 1608 : setting the third reference power value as the first power value. 
     In one embodiment, the first rule includes: the first node determines autonomously that a parameter set of a wireless link corresponding to the first signal or a parameter set of a wireless link corresponding to the second signal is used for determining the first expected power value. 
     In one embodiment, the first rule includes: a parameter set of a wireless link corresponding to the first signal is used for determining a first reference power value, a parameter set of a wireless link corresponding to the second signal is used for determining a second reference power value, and a bigger one of the first reference power value and the second reference power value is set as the first expected power value. 
     The ordinary skill in the art may understand that all or part steps in the above method may be implemented by instructing related hardware through a program. The program may be stored in a computer readable storage medium, for example Read-Only Memory (ROM), hard disk or compact disc, etc. Optionally, all or part steps in the above embodiments also may be implemented by one or more integrated circuits. Correspondingly, each module unit in the above embodiment may be realized in the form of hardware, or in the form of software function modules. The disclosure is not limited to any combination of hardware and software in specific forms. The first node and the second node in the disclosure include but not limited to mobile phones, tablet computers, notebooks, network cards, low-power equipment, eMTC terminals, NB-IOT terminals, vehicle-mounted communication equipment, transportation tools, vehicles, RSUs, aircrafts, airplanes, unmanned aerial vehicles, telecontrolled aircrafts, and other radio communication equipment. The base station in the disclosure includes but not limited to macro-cellular base stations, micro-cellular base stations, home base stations, relay base stations, eNBs, gNBs, TRPs, GNSSs, relay satellites, satellite base stations, air base stations, RSUs and other radio communication equipment. 
     The above are merely the preferred embodiments of the disclosure and are not intended to limit the scope of protection of the disclosure. Any modification, equivalent substitute and improvement made within the spirit and principle of the disclosure are intended to be included within the scope of protection of the disclosure.