Resource mapping method, device and storage medium

Abstract

Embodiments of the present invention disclose a resource mapping method, device, and storage medium. The method includes: a first device receiving a first signaling message sent by a second device, the first signaling message carrying resource configuration parameters. The first device determines, based on the resource configuration parameters, the resource elements (REs) occupied by each CSI-RS resource transmitted by the second device, and receives the CSI-RS resource transmitted by the second device at the corresponding REs. The embodiments of the present invention can address the problem of accurate and efficient CSI-RS resource configuration in existing solutions.

Description

[0001] This application is a divisional application. The application number of the original application is 201911025344.7, and the original application date is October 25, 2019. The entire content of the original application is incorporated into this application by reference. Technical Field

[0002] The present invention relates to the field of communication technologies, and in particular to a resource mapping method, device and storage medium. Background Art

[0003] With the advancement of society, wireless communications have undergone a technological evolution from first-generation analog communication systems to the emerging 5G New Radio (NR) system. Within this complex evolution, beamforming based on multiple-input, multiple-output (MIMO) has been a key research area. Currently, beam management is a key beamforming technology proposed for NR systems. In downlink (DL) scenarios, existing technologies implement beam management using the following schemes.

[0004] The base station (BS) transmits CSI-RS resources sequentially in each beam direction via the NR Uu interface in a scanning manner. Each beam direction corresponds to one or more CSI-RS resources. The BS configures the CSI-RS resources in each beam direction through radio resource control (RRC) signaling, which is then sent to the receiving device. The receiving device receives and measures each CSI-RS resource based on the RRC signaling and feeds the measurement results back to the BS.

[0005] In practice, it is found that due to the sidelink (SL) communication between devices, it is very likely that some devices are not within the coverage of the base station and thus cannot receive the configuration information of the base station for the CSI-RS resources. If the receiving device does not have the BS configuration information for the CSI-RS resources, the transmitting device is required to configure the CSI-RS resources in each beam direction. Often, the configuration of CSI-RS resources is too complicated and is limited by the capabilities of the transmitting device itself, making it impossible to accurately and efficiently implement the configuration of CSI-RS resources. In addition, the CSI-RS resources in the NR Uu interface are very flexible, so the resource overhead of RRC signaling is large. In the SL scenario, limited by the RRC signaling interaction capability, the transmitting device cannot accurately and efficiently implement the indication of CSI-RS resource configuration.

[0006] In the SL scenario, there are the following solutions to implement beam management.

[0007] The transmitting device implements beam management through sidelink control information (SCI). When SL transmit beam training is required, the transmitting device dynamically sends SL CSI-RS resources. Figure 1 In a subframe or time slot, the transmitting device sends SCI signaling to the receiving device. The SCI signaling carries the receiving device's user identifier, CSI-RS resource scheduling indication, and SL CSI-RS transmission information. The SL CSI-RS transmission information includes SL CSI-RS time-frequency resource information, SL CSI-RS resource identifier, and SL CSI-RS scrambling code identifier.

[0008] In practice, it has been found that if beam training involves a large number of CSI-RS resources, the resource overhead of the SCI signaling is high. Due to the limited signaling interaction capabilities, the transmitting device cannot accurately and efficiently configure CSI-RS resources. Summary of the Invention

[0009] The embodiments of the present invention disclose a resource mapping method, apparatus, device and system, which can solve the problem in existing solutions that CSI-RS resource configuration cannot be accurately and efficiently implemented.

[0010] In a first aspect, an embodiment of the present invention provides a resource mapping method, which is applied to a first device, and the method includes: the first device receives a first signaling message sent by a second device, and the first signaling message carries a resource configuration parameter, and the resource configuration parameter includes at least one of the following: the number of beam directions K, the number of antenna ports ρ, the number of ports X of channel state information reference signal CSI-RS resources, or the frequency domain density D of the CSI-RS resources; wherein the antenna port is the antenna port used by the second device to transmit the CSI-RS resource to train the corresponding beam direction, the number of ports of the CSI-RS resource is the number of antenna ports required to carry a single CSI-RS resource, and the frequency domain density is the number of resource units RE occupied on average by each port corresponding to the CSI-RS resource on a resource block RB; the first device determines, based on the resource configuration parameter, the resource element RE occupied by each CSI-RS resource transmitted by the second device, so as to receive the CSI-RS resource transmitted by the second device at the corresponding RE.

[0011] By implementing the embodiments of the present invention, the configuration of CSI-RS resource transmission is realized by using resource configuration parameters, which can solve the problem that the existing solutions are limited by signaling interaction capabilities or device capabilities, resulting in the inability to accurately and efficiently realize CSI-RS resource configuration.

[0012] In combination with the first aspect, in some possible embodiments, the first device determines, based on the resource configuration parameters, the resource element RE occupied by each CSI-RS resource transmitted by the second device, including: the first device obtains an arrangement mode of the CSI-RS resources, the arrangement mode is predefined, or standard-defined, or the arrangement mode of the CSI-RS resources in the frequency domain pre-specified between the first device and the second device, and the arrangement mode includes a comb arrangement or a continuous arrangement; the first device determines, based on the arrangement mode and the resource configuration parameters, the time domain resource number corresponding to the resource element RE occupied by each CSI-RS resource transmitted by the second device in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE.

[0013] By implementing this step, the first device can determine the position of each CSI-RS resource in the time domain, frequency domain, and space (antenna port) according to the arrangement of the CSI-RS resources and the resource configuration parameters, so as to receive the CSI-RS resource at the corresponding position.

[0014] In combination with the first aspect, in some possible embodiments, the resource configuration parameter does not include the number K of beam directions; the number K of beam directions is a predefined number, or a standard-defined number, or a number pre-specified by the first device and the second device.

[0015] By implementing this step, the resource configuration parameter does not need to include the number K of the beam directions, thus saving signaling overhead.

[0016] In combination with the first aspect, in some possible embodiments, the resource configuration parameter does not include the number ρ of the antenna ports; the number ρ of the antenna ports is a predefined number, or a standard-defined number, or a number pre-specified by the first device and the second device.

[0017] By implementing this step, the resource configuration parameter does not need to include the number ρ of the antenna ports, thus saving signaling overhead.

[0018] In combination with the first aspect, in some possible embodiments, the resource configuration parameter does not include the port number X of the channel state information reference signal CSI-RS resource; the port number X of the channel state information reference signal CSI-RS resource is a predefined number, or a standard-defined number, or a number pre-specified by the first device and the second device.

[0019] By implementing this step, the resource configuration parameter does not need to include the port number X of the channel state information reference signal CSI-RS resource, thereby saving signaling overhead.

[0020] In combination with the first aspect, in some possible embodiments, the resource configuration parameters do not include the frequency domain density D of the CSI-RS resource; the frequency domain density D of the CSI-RS resource is a predefined frequency domain density, or a standard-defined frequency domain density, or a frequency domain density pre-specified by the first device and the second device.

[0021] By implementing this step, the resource configuration parameters do not need to include the frequency domain density D of the CSI-RS resources, thus saving signaling overhead.

[0022] In combination with the first aspect, in some possible embodiments, the arrangement manner is a comb arrangement, and the first device determines, according to the arrangement manner and the resource configuration parameters, that the second device transmits each of the CSI-RS resources occupied by the resource element RE corresponding to the time domain resource number in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE. If the number of ports X of the CSI-RS resource is 1, then the first device determines the antenna port P. i The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to the time domain resource number l in the time domain and the frequency domain resource number k in the frequency domain, where l and k satisfy: l=L-m+1, in, i is the antenna port P i , i is any one of the following value ranges: {1, 2, 3, ..., ρ}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, the possible value range of L is {0, 1, 2, ..., 13}, and m is a positive integer.

[0023] In combination with the first aspect, in some possible embodiments, the arrangement is a continuous arrangement, and the first device determines, according to the arrangement and the resource configuration parameters, the time domain resource number corresponding to the resource element RE occupied by each CSI-RS resource transmitted by the second device in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE. If the number of ports X of the CSI-RS resource is 1, then the first device determines the number of antenna ports P. i The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to the time domain resource number l in the time domain and the frequency domain resource number k in the frequency domain, where l and k satisfy: l=L-m+1, in, (i-1)×D+1, (i-1)×D+2, ..., i×D-1}, i is the antenna port P iThe logical number, where i is any value in the following range: {1, 2, 3,..., ρ}, L is the time-domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, and the possible range of values of L is {0, 1, 2,..., 13}, and m is a positive integer.

[0024] By implementing this step, regardless of whether the CSI-RS resources are arranged in a comb-like pattern or a continuous pattern, if the number of ports X of the CSI-RS resources is 1, the first device can determine the antenna port P according to the resource configuration parameters. i For the resource element RE occupied by the m-th CSI-RS resource transmitted on, specifically determine the time-domain resource number, the frequency-domain resource number corresponding in the frequency domain, and the antenna port number P carrying this RE. i .

[0025] Combined with the first aspect, in some possible embodiments, before the first device determines the time-domain resource number l and the frequency-domain resource number k corresponding to the RE occupied by the m-th CSI-RS resource transmitted on the antenna port P, the method further includes: the first device determines the number M of CSI-RS resources transmitted on the antenna port P according to the number K of beam directions and the number ρ of antenna ports. i The first device determines the number M of CSI-RS resources transmitted on the antenna port P according to the number K of beam directions and the number ρ of antenna ports. i The number M of CSI-RS resources transmitted on the antenna port P. i , where m is a positive integer less than or equal to M. i Positive integer.

[0026] Combined with the first aspect, in some possible embodiments, the first device determines the number of CSI-RS resources transmitted on the antenna port P according to the number K of beam directions and the number ρ of antenna ports, including: i The number of CSI-RS resources transmitted on the antenna port P includes:

[0027] If mod(K, ρ) ≥ i, or mod(K, ρ) = 0, then the first device determines the number M of CSI-RS resources transmitted on the antenna port P. i The number M of CSI-RS resources transmitted on the antenna port P. i Is Or, if mod(K, ρ) < i and mod(K, ρ) ≠ 0, then the first device determines the number M of CSI-RS resources transmitted on the antenna port P. i The number M of CSI-RS resources transmitted on the antenna port P. i Is [[ID=*]]

[0028] By implementing this step, the first device can determine the number M of CSI-RS resources carried on the antenna port P according to the resource configuration parameters. [[ID=4I]] i The number M of CSI-RS resources carried on the antenna port P. i , so as to implement the transmission configuration of CSI-RS resources through the resource configuration parameters.

[0029] In combination with the first aspect, in some possible embodiments, the arrangement manner is a comb arrangement, and the first device determines, according to the arrangement manner and the resource configuration parameter, the time domain resource number corresponding to the resource element RE occupied by each CSI-RS resource transmitted by the first device in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE, including: if the number of ports X of the CSI-RS resource is 2, the number of antenna ports ρ is an even number, and the first device determines the number of antenna ports P at the antenna port P. i and P i+1 The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to the time domain resource number l in the time domain and the frequency domain resource number k in the frequency domain, where l and k satisfy: l=L-m+1, in, k'={0, 1}, i is the antenna port P i , i is any one of the following value ranges: {1, 3, 5, ..., ρ-1}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, the possible value range of L is {0, 1, 2, ..., 13}, and m is a positive integer.

[0030] In combination with the first aspect, in some possible embodiments, the arrangement manner is a continuous arrangement, and the first device determines, according to the arrangement manner and the resource configuration parameter, that the second device transmits each of the CSI-RS resources occupied by the resource element RE corresponding to the time domain resource number in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE. The number includes: if the number of ports X of the CSI-RS resource is 2, the number of antenna ports ρ is an even number, and the first device determines the number of antenna ports P at the antenna port P. i and P i+1 The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to a time domain resource number l in the time domain and a frequency domain resource number k in the frequency domain, wherein l and k satisfy: l=L-m+1; in (i-1)×D+2, (i-1)×D+4, ..., (i+1)×D-2}, k'={0, 1}, i is the antenna port P i , i is any one of the following value ranges: {1, 3, 5, ..., ρ-1}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, the possible value range of L is {0, 1, 2, ..., 13}, and m is a positive integer.

[0031] By implementing this step, regardless of whether the CSI-RS resources are arranged in a comb-like or continuous manner, if the number of ports X of the CSI-RS resources is 2, the first device can also determine the dual antenna port P according to the resource configuration parameters. i and P i+1 The resource element RE occupied by the mth CSI-RS resource transmitted.

[0032] In combination with the first aspect, in some possible embodiments, the first device determines i and P i+1 The method further includes: the first device determines the antenna port P according to the number K of the beam directions and the number ρ of the antenna ports. i and P i+1 The number M of the CSI-RS resources transmitted i , m is less than or equal to M i A positive integer.

[0033] In combination with the first aspect, in some possible embodiments, the first device determines the antenna port P according to the number K of the beam directions and the number ρ of the antenna ports. i and P i+1 The number M of the CSI-RS resources transmitted i Including: If or Then determine the antenna port P i and P i+1 The number M of the CSI-RS resources transmitted i for Or, if and Then determine the antenna port P i and P i+1 The number M of the CSI-RS resources transmitted i for

[0034] In second aspect, an embodiment of the present invention provides a resource mapping method, which is applied to a second device, and the method includes: the second device obtains the resource configuration parameters of the second device, and the resource configuration parameters are used to indicate the resource elements RE occupied by each channel state information reference signal CSI-RS resource transmitted by the second device; the second device sends a first signaling message to the first device, and the first signaling message carries the resource configuration parameters.

[0035] By implementing the embodiments of the present invention, the second device configures CSI-RS resources through signaling messages to inform the first device how the second device transmits the CSI-RS resources. This can solve the problem of the inability to accurately and efficiently implement CSI-RS resource configuration in existing solutions.

[0036] In combination with the second aspect, in some possible embodiments, the resource configuration parameters include at least one of the following: the number of beam directions K, the number of antenna ports ρ, the number of ports of CSI-RS resources X, or the frequency domain density D of the CSI-RS resources; wherein, the antenna port is the antenna port used by the second device to transmit the CSI-RS resource to train the corresponding beam direction, the number of ports of the CSI-RS resource is the number of antenna ports required to carry a single CSI-RS resource, and the frequency domain density is the average number of resource elements RE occupied by each port corresponding to the CSI-RS resource on a resource block.

[0037] In combination with the second aspect, in some possible embodiments, the second device obtains the resource configuration information of the second device, including: receiving a second signaling message sent by the network device, the second signaling message carrying the resource configuration parameters; parsing the second signaling message to obtain the resource configuration parameters.

[0038] By implementing this step, the network device (base station) can configure CSI-RS resources for the second device. Compared with the second device configuring CSI-RS resources itself, it can save device resources and improve the configuration efficiency of CSI-RS resources.

[0039] In combination with the second aspect, in some possible embodiments, the resource configuration parameter does not include the number K of beam directions; the number K of beam directions is a predefined number, or a standard-defined number, or a number pre-specified by the first device and the second device.

[0040] By implementing this step, the resource configuration parameter does not need to include the number K of the beam directions, thus saving signaling overhead.

[0041] In combination with the second aspect, in some possible embodiments, the resource configuration parameter does not include the number ρ of the antenna ports; the number ρ of the antenna ports is a predefined number, or a standard-defined number, or a number pre-specified by the first device and the second device.

[0042] By implementing this step, the resource configuration parameter does not need to include the number ρ of the antenna ports, thus saving signaling overhead.

[0043] In combination with the second aspect, in some possible embodiments, the resource configuration parameter does not include the port number X of the channel state information reference signal CSI-RS resource; the port number X of the channel state information reference signal CSI-RS resource is a predefined number, or a standard-defined number, or a number pre-specified by the first device and the second device.

[0044] By implementing this step, the resource configuration parameter does not need to include the port number X of the channel state information reference signal CSI-RS resource, thereby saving signaling overhead.

[0045] In combination with the second aspect, in some possible embodiments, the resource configuration parameters do not include the frequency domain density D of the CSI-RS resource; the frequency domain density D of the CSI-RS resource is a predefined frequency domain density, or a standard-defined frequency domain density, or a frequency domain density pre-specified by the first device and the second device.

[0046] By implementing this step, the resource configuration parameters do not need to include the frequency domain density D of the CSI-RS resources, thus saving signaling overhead.

[0047] In combination with the second aspect, in some possible embodiments, the second device determines the resource element RE occupied by each CSI-RS resource for its own transmission based on the resource configuration parameters; and the CSI-RS resource is carried correspondingly at the RE to send the CSI-RS resource to the first device.

[0048] By implementing this step, the second device can determine the REs occupied by the CSI-RS resources according to the resource configuration parameters to implement the configuration of the CSI-RS resources. Correspondingly, the first device can receive the CSI-RS resources at the corresponding REs.

[0049] In combination with the second aspect, in some possible embodiments, the second device determines the resource element RE occupied by each CSI-RS resource transmitted by itself according to the resource configuration parameters, including: the second device obtains the arrangement mode of the CSI-RS resources, the arrangement mode is predefined, or standard-defined, or the arrangement mode of the CSI-RS resources in the frequency domain pre-specified between the first device and the second device, and the arrangement mode includes comb arrangement or continuous arrangement; the second device determines the time domain resource number corresponding to the resource element RE occupied by each CSI-RS resource transmitted by the second device in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE according to the arrangement mode and the resource configuration parameters.

[0050] In combination with the second aspect, in some possible embodiments, the arrangement manner is a comb arrangement, and the second device determines, according to the arrangement manner and the resource configuration parameter, the time domain resource number corresponding to the resource element RE occupied by each CSI-RS resource transmitted by the second device in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE. If the number of ports X of the CSI-RS resource is 1, then the second device determines the number of antenna ports P. i The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to a time domain resource number l in the time domain and a frequency domain resource number k in the frequency domain, wherein l and k satisfy: l=L-m+1; in, i is the antenna port P i , i is any one of the following value ranges: {1, 2, 3, ..., ρ}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, the possible value range of L is {0, 1, 2, ..., 13}, and m is a positive integer.

[0051] In combination with the second aspect, in some possible embodiments, the arrangement is a continuous arrangement, and the second device determines, according to the arrangement and the resource configuration parameters, the time domain resource number corresponding to the resource element RE occupied by each CSI-RS resource transmitted by the second device in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE. If the number of ports X of the CSI-RS resource is 1, then the second device determines the number of antenna ports P. i The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to a time domain resource number l in the time domain and a frequency domain resource number k in the frequency domain, wherein l and k satisfy: l=L-m+1; in, (i-1)×D+1, (i-1)×D+2, ..., i×D-1}, i is the antenna port P i , i is any one of the following value ranges: {1, 2, 3, ..., ρ}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, the possible value range of L is {0, 1, 2, ..., 13}, and m is a positive integer.

[0052] In conjunction with the second aspect, in some possible embodiments, the second device determines iBefore the time domain resource number l corresponding to the RE occupied by the m-th CSI-RS resource transmitted above in the time domain and the frequency domain resource number k corresponding to it in the frequency domain, the method further includes: the second device determines the antenna port P according to the number K of beam directions and the number ρ of antenna ports i The number M of CSI-RS resources transmitted above i , where m is a positive integer less than or equal to M i and a positive integer

[0053] Combined with the second aspect, in some possible embodiments, the second device determines the antenna port P according to the number K of beam directions and the number ρ of antenna ports i The number of CSI-RS resources transmitted above includes: if mod(K, ρ) ≥ i, or mod(K, ρ) = 0, then the first device determines the antenna port P i The number M of CSI-RS resources transmitted above i is Alternatively, if mod(K, ρ) < i and mod(K, ρ) ≠ 0, then the first device determines the antenna port P i The number M of CSI-RS resources transmitted above i is

[0054] Combined with the second aspect, in some possible embodiments, the arrangement is a comb-like arrangement. The second device determines the time domain resource number corresponding to the resource element RE occupied by the first device for transmitting each CSI-RS resource in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE, including: if the number X of ports of the CSI-RS resource is 2, then the number ρ of antenna ports is even, and the first device determines that the time domain resource number l corresponding to the RE occupied by the m-th CSI-RS resource transmitted on the antenna ports P i and P i+1 in the frequency domain, where l and k satisfy: l = L - m + 1; where k' = {0, 1}, i is the logical number of the antenna port P i , i is any value in the following range: {1, 3, 5,..., ρ - 1}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, and the possible value range of L is {0, 1, 2,..., 13}, and m is a positive integer

[0055] In combination with the second aspect, in some possible embodiments, the arrangement is a continuous arrangement, and the first device determines, according to the arrangement and the resource configuration parameters, that the second device transmits each of the CSI-RS resources occupied by the resource element RE corresponding to the time domain resource number in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE. The number includes: if the number of ports X of the CSI-RS resource is 2, the number of antenna ports ρ is an even number, and the second device determines the number of antenna ports P at the antenna port P. i and P i+1 The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to a time domain resource number l in the time domain and a frequency domain resource number k in the frequency domain, wherein l and k satisfy: l=L-m+1; in, (i-1)×D+2, (i-1)×D+4, ..., (i+1)×D-2}, k'={0, 1}, i is the antenna port P i , i is any one of the following value ranges: {1, 3, 5, ..., ρ-1}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, the possible value range of L is {0, 1, 2, ..., 13}, and m is a positive integer.

[0056] In combination with the second aspect, in some possible embodiments, the first device determines i and P i+1 The method further includes: the first device determines the antenna port P according to the number K of the beam directions and the number ρ of the antenna ports. i and P i+1 The number M of the CSI-RS resources transmitted i , m is less than or equal to M i A positive integer.

[0057] In combination with the second aspect, in some possible embodiments, the second device determines the antenna port P according to the number K of the beam directions and the number ρ of the antenna ports. i and P i+1 The number M of the CSI-RS resources transmitted i include:

[0058] like or Then determine the antenna port P i and P i+1 The number M of the CSI-RS resources transmittedi for Or, if and Then determine the antenna port P i and P i+1 The number M of the CSI-RS resources transmitted i for

[0059] Regarding the contents not shown or described in the embodiments of the present invention, specific reference may be made to the method described in the first aspect above, and no further details will be given here.

[0060] In a third aspect, an embodiment of the present invention provides a first device, which includes a functional device, such as a module or a unit, for executing the method described in the first aspect or any possible implementation of the first aspect.

[0061] In a fourth aspect, an embodiment of the present invention provides a second device, which includes a functional device, such as a module or a unit, for executing the method described in the second aspect or any possible implementation of the second aspect.

[0062] In a fifth aspect, an embodiment of the present invention provides another first device, which includes a processor, a memory, a communication interface and a bus; the processor, the communication interface and the memory communicate with each other through the bus; the communication interface is used to receive and send data; the memory is used to store instructions; the processor is used to call the instructions in the memory and execute the method described in the above first aspect or any possible implementation of the first aspect.

[0063] In a sixth aspect, an embodiment of the present invention provides another second device, which includes a processor, a memory, a communication interface and a bus; the processor, the communication interface and the memory communicate with each other through the bus; the communication interface is used to receive and send data; the memory is used to store instructions; the processor is used to call the instructions in the memory and execute the method described in the above second aspect or any possible implementation of the second aspect.

[0064] In a seventh aspect, an embodiment of the present invention provides a resource mapping system, comprising a first device and a second device. The second device sends a first signaling message to the first device. Accordingly, the first device receives the first signaling message sent by the second device, and the first signaling message carries a resource configuration parameter. The resource configuration parameter includes at least one of the following: the number of beam directions K, the number of antenna ports ρ, the number of ports of CSI-RS resources X, or the frequency domain density D of the CSI-RS resources; wherein the antenna port is the antenna port used by the second device to transmit the CSI-RS resource to train the corresponding beam direction, the number of ports of the CSI-RS resource is the number of antenna ports required to carry a single CSI-RS resource, and the frequency domain density is the average number of resource elements RE occupied by each port corresponding to the CSI-RS resource on a resource block. Further, the first device determines the resource element RE occupied by each CSI-RS resource transmitted by the second device based on the resource configuration parameter, so as to receive the CSI-RS resource transmitted by the second device at the corresponding RE.

[0065] Regarding the contents not shown or described in the embodiments of the present invention, specific reference may be made to the technical contents described in the first or second aspect above, and no further details will be given here.

[0066] In an eighth aspect, an embodiment of the present invention provides a computer-readable storage medium storing program code for resource mapping, wherein the program code includes instructions for executing the method described in the first aspect or any possible implementation of the first aspect.

[0067] In a ninth aspect, an embodiment of the present invention provides a computer-readable storage medium storing program code for resource mapping, wherein the program code includes instructions for executing the method described in the second aspect or any possible implementation of the second aspect.

[0068] In a tenth aspect, an embodiment of the present invention provides a chip product to execute the method in the above-mentioned first aspect or any possible implementation of the first aspect.

[0069] In an eleventh aspect, an embodiment of the present invention provides a chip product to execute the method in the second aspect or any possible implementation of the second aspect.

[0070] Based on the implementation methods provided in the above aspects, this application can also be further combined to provide more implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0072] Figure 1 This is a transmission diagram of SL CSI-RS resources provided by the prior art.

[0073] Figure 2 This is a schematic diagram of a vehicle-to-vehicle (V2V) communication scenario provided by the prior art.

[0074] Figure 3 It is a structural diagram of a communication system provided by an embodiment of the present invention.

[0075] Figure 4 It is a flowchart of a resource mapping method provided by an embodiment of the present invention.

[0076] Figure 5(a)-Figure 5(c) This is a schematic diagram of three time slot usage scenarios provided by an embodiment of the present invention.

[0077] FIG6(a) and FIG6(b) are schematic diagrams of two resource mapping scenarios provided by an embodiment of the present invention.

[0078] Figure 7 This is a schematic diagram of another resource mapping scenario provided by an embodiment of the present invention.

[0079] Figure 8 This is a schematic diagram of another resource mapping scenario provided by an embodiment of the present invention.

[0080] Figure 9 This is a schematic diagram of another resource mapping scenario provided by an embodiment of the present invention.

[0081] Figure 10 It is a structural diagram of a resource mapping system provided by an embodiment of the present invention.

[0082] Figure 11 It is a structural diagram of another resource mapping system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0083] The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the present invention.

[0084] Currently, the existing beam management process is only applied between user equipment (UE) and base station (BS). In sidelink (SL) scenarios such as vehicle to everything (V2X), both the transmitting device (referred to as the transmitting device) and the receiving device (referred to as the receiving device) are user equipment (UE). Figure 2 A schematic diagram of a vehicle-to-vehicle (V2V) communication scenario is shown. Figure 2 In vehicle platooning, the lead vehicle transmits maneuvering information to other vehicles in the platoon via V2V, enabling autonomous driving. When any vehicle in the platoon detects another vehicle using its extended sensor, it transmits this extended sensor information to the other vehicles via V2V messaging, ensuring safe driving. Currently, V2V communications still face numerous challenges. To promote the development of V2X technology, beam management in V2V SL scenarios is a critical issue that needs to be addressed.

[0085] Beam management in the existing DL is implemented using the following scheme. The base station instructs the UE through RRC signaling to implement the configuration of CSI-RS resources. Specifically, the beam management of the NR Uu interface can be implemented based on CSI-RS resources. The NR Uu interface refers to the communication interface between the user equipment and the base station. NR Uu focuses on flexible physical channel and signal design, and its CSI-RS resources have a high degree of freedom in configuration. In the physical downlink shared channel (PDSCH), parameters such as the time domain position, frequency domain position, bandwidth and period of the CSI-RS resources can be configured, and different configuration methods correspond to different CSI-RS resources. To achieve beam training, the BS allocates K or more CSI-RS resources to K transmit beams, and sends these CSI-RS resources through beam scanning. Among these CSI-RS resources, the maximum number of antenna ports carrying a single CSI-RS resource is 2, and other resource configuration information is uncertain and needs to be configured by the BS and indicated to the UE through RRC signaling. At the same time, the BS only transmits CSI-RS resources in a single beam direction at a certain moment.

[0086] In practice, it is found that if the SL communication system continues to use the above method, the system will face the following problems:

[0087] (1) The configuration capability of the transmitting device is limited. In the SL communication system, both the transmitting device and the receiving device belong to the SL communication of the UE. There is a situation where the transmitting device is not within the range of the base station BS and cannot receive the SL CSI-RS configuration information sent by the BS. If the transmitting device itself does not have the BS's pre-configuration information for the SL CSI-RS resources, the transmitting device needs to configure the SL CSI-RS resources indicating each beam direction by itself. Due to the limitation of the configuration capability of the transmitting device, the configuration of CSI-RS resources in NR Uu is very complex, and it is impossible to implement CSI-RS resource configuration efficiently and accurately.

[0088] (2) The interactive capability of PC5-RRC signaling in SL communication is limited. Since the configuration information of each CSI-RS resource in NR Uu needs to be notified to the receiving device by the BS through RRC signaling. For a single CSI-RS resource, its configuration information includes resource identification, resource mapping, transmission period and time offset, etc. The resource mapping also includes the time domain position, frequency domain position, number of antenna ports, code division multiplexing method, frequency domain density, bandwidth, etc. of the CSI-RS on the physical resource (such as resource element, resource element, RE). If the number of CSI-RS resources is large, the RRC signaling overhead is large. Considering the signaling interaction capability, the configuration of CSI-RS resources in NR Uu is very complex, and it is impossible to implement CSI-RS resource configuration efficiently and accurately.

[0089] For beam management in SL scenarios, there are the following schemes. The transmitting device generates SL CSI-RS resources and dynamically sends the SL CSI-RS resources. In a subframe or time slot, the transmitting device first sends SCI signaling. The SCI signaling includes a receiving device identifier, also known as a user identifier for receiving the SL CSI-RS resource, a SL CSI-RS resource scheduling indication, also known as a SL CSI-RS scheduling indication for beam training, and SL CSI-RS transmission information. Among them, the SL CSI-RS transmission information includes the time-frequency resource information of the SL CSI-RS, the SL CSI-RS resource identifier, the SL CSI-RS scrambling code identifier, etc. After the SCI signaling is sent, the remaining subframes or time slots are used to send SL CSI-RS resources in different beam directions. As above Figure 1 Schematic diagram showing SL CSI-RS resource transmission. Figure 1 The schematic diagram shows the arrangement of SL CSI-RS resources in a subframe or time slot. As shown in the figure, SL CSI-RS resources are transmitted in sequence.

[0090] However, it is found in practice that if the number of SL CSI-RS resources is large, the resource overhead of SCI signaling is large, which will lead to a large overhead of beam management.

[0091] To solve the above problems, the present invention proposes a resource mapping method, and related devices and systems applicable to the method. Figure 3 FIG. 1 is a schematic diagram of the structure of a communication system provided by an embodiment of the present invention. Figure 3 , the communication system includes a first device 102 and a second device 104. Optionally, the communication system may further include a base station 106, which supports mutual communication with the first device 102 and the second device 104. The first device 102 and the second device 104 may communicate with each other through the base station 106, or the first device 102 and the second device 104 may communicate with each other directly through a network.

[0092] The first device 102 and the second device 104 are either a receiving device or a transmitting device, respectively, and the first device and the second device are different. For example, if the first device is a receiving device, the second device is a transmitting device; conversely, if the first device is a transmitting device, the second device is a receiving device. For the convenience of description, the present invention will be described below using the first device as a receiving device and the second device as a transmitting device as an example. As shown in the beam training scenario, the second device (transmitting device) supports the transmission of multiple transmit beams on a certain antenna port, each transmit beam corresponds to a beam direction, and each beam direction corresponds to one or more transmit beams. As Figure 3 The transmission beams in three beam directions are shown, which are represented by water drop shapes, and each water drop shape represents a transmission beam.

[0093] In actual applications, the first device and the second device can both be user devices, which include but are not limited to vehicles, computers, tablet personal computers, personal digital assistants (PDAs), mobile internet devices (MIDs), wearable devices, vehicle-mounted devices, and other devices that support network communication.

[0094] See Figure 4 , is a flow chart of a resource mapping method provided by an embodiment of the present invention. Figure 4 The method shown is applied to a communication system, and the method includes the following implementation steps S401 to S406:

[0095] Step S401: The second device obtains resource configuration parameters.

[0096] The resource configuration parameters of the present invention may be configured by the second device itself according to actual business needs, or may be issued by a network device, which includes but is not limited to a base station BS, a router, and other devices. Taking issuance by a network device as an example, the second device receives a signaling message (which may be referred to as a second signaling message) issued by the network device. The signaling message carries the resource configuration parameters, which are used to indicate how to carry and transmit SL CSI-RS resources (hereinafter referred to as CSI-RS resources) on each antenna port of the second device.

[0097] The resource configuration parameter includes at least one of the following: the number of beam directions K, the number of antenna ports ρ, the number of ports X of CSI-RS resources, or the frequency domain density D of CSI-RS resources. Optionally, the resource configuration parameter is not limited to the above parameters, and may also include other parameters that affect the transmission of CSI-RS resources. The beam direction is the beam direction that the second device needs to train, and the antenna port is the antenna port used by the second device to transmit CSI-RS resources to train the corresponding beam direction. The number of ports X of the CSI-RS resource refers to the number of antenna ports required to carry a single CSI-RS resource, where X can be 1 or 2, or can be expressed as: X=1 or 2.

[0098] The frequency domain density is the average number of resource elements RE occupied by each port corresponding to the CSI-RS resource in one resource block. The resource block is the resource transmission unit used by the second device to transmit the CSI-RS resource in the physical layer shared channel. The resources corresponding to the resource block in the time domain can be called time domain resources, and the resources corresponding to the resource block in the frequency domain can be called frequency domain resources. The number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the resource block in the time domain and the number of subcarriers occupied in the frequency domain can be determined according to actual needs and are not limited. Usually, a resource block (RB) occupies 14 OFDM symbols in the time domain and 12 subcarriers in the frequency domain.

[0099] In practical applications, the number K of beam directions may be a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device. In this case, the resource configuration parameter does not include the number K of beam directions. Similarly, the number p of antenna ports may be a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device. In this case, the resource configuration parameter does not include the number p of antenna ports. Similarly, the number X of CSI-RS resource ports may be a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device. In this case, the resource configuration parameter does not include the number X of CSI-RS resource ports. Similarly, the frequency domain density D of the CSI-RS resource may be a predefined frequency domain density, a frequency domain density defined by a standard, or a frequency domain density pre-specified by the first device and the second device. In this case, the resource configuration parameter does not include the frequency domain density D of the CSI-RS resource.

[0100] Step S402: The second device determines, according to the resource configuration parameters, the resource elements RE occupied by each CSI-RS resource transmitted by the second device.

[0101] Step S403: The second device sends a first signaling message to the first device, where the first signaling message carries resource configuration parameters. Correspondingly, the first device receives the first signaling message sent by the second device.

[0102] Step S404: The first device determines, according to the resource configuration parameters, the resource elements RE occupied by each CSI-RS resource transmitted by the second device.

[0103] Step S405: The second device carries a CSI-RS resource corresponding to the resource element RE occupied by each determined CSI-RS resource, and sends the CSI-RS resource to the first device.

[0104] Step S406: The first device receives the CSI-RS resource sent by the second device at the resource element RE occupied by each determined CSI-RS resource.

[0105] The resource configuration parameter of the present invention is used to indicate the transmission configuration of each SL CSI-RS resource, specifically to indicate the time domain resource number corresponding to the resource element RE occupied by each SL CSI-RS resource in the time domain, the frequency domain resource number corresponding to the frequency domain, and the antenna port number corresponding to the spatial domain (space). Accordingly, after the second device obtains the resource configuration parameter, it can determine the resource element RE occupied by its own device for transmitting each CSI-RS resource based on the resource configuration parameter, so as to facilitate the subsequent sending of the CSI-RS resource to the first device at the corresponding RE.

[0106] The second device may also send the resource configuration parameter to the first device, so that the first device determines the RE occupied by each CSI-RS resource based on the resource configuration parameter, thereby facilitating subsequent reception of the CSI-RS resource transmitted from the second device at the corresponding RE. Specifically, the second device may send the resource configuration parameter to the first device via signaling, for example, the second device may send a first signaling message to the first device, where the first signaling message carries the resource configuration parameter.

[0107] In practical applications, the first signaling message may be a PC5-RRC signaling message, where PC5 refers to the communication interface between user equipments. The PC5-RRC signaling message carries resource configuration parameters and may optionally include other parameters, which may be determined based on actual service requirements, such as a resource identifier and a transmission period.

[0108] It should be noted that the execution order of step S402 and step S403 is not limited, for example, they can be executed after steps S403 and S404. Step S405 must be executed after step S402, and step S406 must be executed after step S404.

[0109] In one example, the specific implementation methods of determining the resource element RE occupied by each CSI-RS resource in S402 or S404 are the same. The following takes S404 as an example to illustrate how the first device determines the resource element RE occupied by the CSI-RS resource according to the resource configuration parameters. Specifically, the first device needs to obtain the arrangement mode of the CSI-RS resource, which includes a comb arrangement or a continuous arrangement. The arrangement mode can be predefined, or standard-defined, or an arrangement mode of the CSI-RS resource in the frequency domain that is pre-defined or negotiated between the first device and the second device. Further, the first device determines the RE occupied by each CSI-RS resource transmitted by the second device based on the arrangement mode and the resource configuration parameters, and can specifically determine the time domain resource number corresponding to the RE in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number corresponding to the spatial domain. It can be seen that the arrangement mode and resource configuration parameters of the CSI-RS resource will affect the transmission of the CSI-RS resource. Several specific embodiments of S404 are given below.

[0110] In the SL scenario, the second device uses p antenna ports to perform transmit beam training in K beam directions. In addition, the density of CSI-RS resources in a single resource block in a single time slot (i.e., frequency domain density) is D RE / port / RB. Based on the above parameters, the CSI-RS resources transmitted by the second device in K beam directions are called a CSI-RS resource set, and at least K CSI-RS resources are configured in the resource set. The resource configuration of a single CSI-RS resource may include a resource identifier and / or resource mapping. The present invention will start from the perspective of configurable resource mapping and propose a CSI-RS resource configuration method for transmit beam training.

[0111] First embodiment: The CSI-RS resources are arranged in a comb-like distribution, and the number of CSI-RS resource ports X is 1

[0112] Considering that the second device will not use more than K antenna ports for beam training in K beam directions, the number of antenna ports ρ is less than or equal to K, which can be expressed as ρ≤K. Since each antenna port can point to one beam direction in the same symbol time, the maximum number of OFDM symbols occupied by CSI-RS resources in a single time slot is In this embodiment of the present invention, if the frequency domain density D>1RE / port / RB, the CSI-RS resources are arranged in a comb-like manner in the frequency domain. Specifically, if the minimum frequency domain resource number of the CSI-RS resource with frequency domain density D in a single resource block is k0, then the frequency domain resource number corresponding to the resource element RE used by the CSI-RS resource in the frequency domain is: To ensure reliable transmission of CSI-RS resources, it is necessary to ensure Right now In addition, the maximum value of k0 is ρ-1. When k0=ρ-1, ρ antenna ports point to ρ beam directions. Therefore, the relationship between D and ρ is: Considering that the CSI-RS resources are comb-distributed in the frequency domain and D is a positive integer, it can be seen that the feasible frequency domain density D of the CSI-RS resources, that is, D is any one of the following value ranges: {1, 2, 3, 4, 6, 12}, can also be expressed as the value range of D is {1, 2, 3, 4, 6, 12}, that is, D is any one of {1, 2, 3, 4, 6, 12}, and The above conclusion also shows that ρ should satisfy ρ≤12, so the value range of ρ is {1, 2, 3, ..., 12}.

[0113] According to the above relationship, the second device can determine the specific carrying positions of the K CSI-RS resources in the CSI-RS resource set in the following possible manners:

[0114] ① For the logical number of the antenna port i∈{1,2,3,...,ρ}, the antenna port corresponding to the logical number i is P i , the following is the antenna port P i Take this as an example for detailed analysis.

[0115] ② If mod(K,ρ)≥i or mod(K,ρ)=0, then at antenna port P i The number of CSI-RS resources allocated on i for Taking the mth CSI-RS resource as an example, the RE occupied by the mth CSI-RS resource corresponds to a time domain resource number of 1 in the time domain and a frequency domain resource number of k in the frequency domain. The l and k satisfy the following conditions:

[0116] l = L - m + 1;

[0117]

[0118] in i is the antenna port P i The logical number of i. i is any one of the following value ranges: {1, 2, 3, ..., ρ}. L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot. The possible value range of L is {0, 1, 2, 3, ..., 13}. In this example, m is less than or equal to M i The value range of m is

[0119] In particular, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot. If the physical layer shared channel is a physical sidelink shared channel (PSSCH), the possible value range of L is {0, 1, 2, 3, ..., 12}. This is because the last symbol in the time slot may be used as the time interval (GAP) symbol required to switch time slots, so PSSCH will not occupy the last symbol in the time slot, that is, L=13 is impossible. Furthermore, the value of L depends on how many symbols in the time slot can be used by SL. When the time slot containing 14 symbols is fully used by SL, L=12. When only some symbols in the time slot are used by SL, L<=12. Please refer to Figure 5(a)-Figure 5(c) A detailed diagram showing the usage of time slots is shown in FIG. Figure 5(a)-Figure 5(c)As shown, the part of a time slot used by the SL can be referred to as the SL time slot, and the part not used by the SL can be referred to as the non-SL time slot. The first symbol of the SL time slot is used as an automatic gain control (AGC) symbol, and the last symbol of the SL time slot is used as the time interval (GAP) symbol required for switching time slots. Each time slot includes 14 OFDM symbols, and in the embodiments of the present invention, the OFDM symbols are all simply referred to as symbols. In the figure, the light gray rectangles represent the symbols in the SL time slot that are not used as AGC symbols and not used as GAP symbols, and the white rectangles represent the AGC symbols or GAP symbols in the SL time slot. The dark gray rectangles represent the symbols in the non-SL time slot.

[0120] Specifically, as shown in Figure 5(a), the entire time slot is used as the SL time slot, and the SL time slot occupies 14 symbols. At this time, the time domain resource number corresponding to the last symbol of the PSSCH is 12, so L = 12. As shown in Figure 5(b), the SL time slot occupies the first part of the entire time slot. The SL time slot occupies the first 11 symbols of the entire time slot, and the non-SL time slot occupies the last 3 symbols of the entire time slot. At this time, the time domain resource number corresponding to the last symbol of the PSSCH is 9, so L = 9. As shown in Figure 5(c), the SL time slot occupies the last part of the entire time slot. As shown, the non-SL time slot occupies the first 3 symbols of the entire time slot, and the SL time slot occupies the last 11 symbols of the entire time slot. At this time, the time domain resource number corresponding to the last symbol of the PSSCH is 12, so L = 12.

[0121] It should be noted that Figure 5(a)-Figure 5(c) This is only an example of the time slot usage. In actual applications, the SL time slot can also occupy any number of symbols in the entire time slot, and the time domain resource number L of the last symbol of the corresponding PSSCH can also be Figure 5(a)-Figure 5(c) more values than those shown, without limitation.

[0122] ③. If mod(K, ρ) < i and mod(K, ρ) ≠ 0, then the number M of CSI-RS resources allocated on the antenna port P i is i For example, taking the mth CSI-RS resource as an example, the RE occupied by the mth CSI-RS resource corresponds to the time domain resource number l in the time domain and the frequency domain resource number k in the frequency domain. The l and k satisfy the following conditions: l = L - m + 1;

[0123] l = L - m + 1;

[0124]

[0125] where l and i can be correspondingly referred to the above description in the embodiments of the present invention. In this example, m is less than or equal to Mi The specific value range of m is

[0126] ④. After i has traversed all values ​​in the set {1, 2, 3, ..., ρ}, the second device determines the REs occupied by the K CSI-RS resources. Specifically, it determines the time domain resource number corresponding to each RE occupied by the CSI-RS resource in the time domain, the frequency domain resource number corresponding to each RE occupied by the CSI-RS resource in the frequency domain, and the antenna port number corresponding to each antenna port in the spatial domain. In other words, the second device determines the REs occupied by each antenna port that carries the CSI-RS resource.

[0127] It should be noted that the number of ports used by each CSI-RS resource in the present invention is the same, namely 1. That is, the number of antenna ports required to carry a single CSI-RS resource is 1. Each CSI-RS resource also uses the same code division multiplexing mode noCDM, using a given frequency domain density D, and the bandwidth occupied by the CSI-RS resource can be the entire bandwidth allocated to the second device.

[0128] After the above steps, the second device can calculate the resource mapping method of K CSI-RS resources used for beam training according to the resource configuration parameters, that is, the RE occupied by each CSI-RS resource. Before performing transmit beam training, the second device can send its own resource configuration parameters to the first device through a signaling message, so that both the first device and the second device can calculate the same CSI-RS resource mapping method. In the time slot used for transmit beam training, the second device can also place automatic gain control (AGC) symbols, physical sidelink control channel (PSCCH) control symbols, PSSCH data symbols, etc. on other REs except the REs occupied by CSI-RS resources. The principle of placement is not to affect the transmit beam training function of the CSI-RS resources.

[0129] To facilitate understanding, two specific examples are described below. Figure 6(a) is a schematic diagram of a resource mapping scenario provided by an embodiment of the present invention. The resource configuration parameters used in Figure 6(a) are: transmit beam direction K = 3, the number of antenna ports participating in beam training ρ = 1, and the frequency domain density D of the CSI-RS resource = 1. Specifically, the entire time slot is used as the SL time slot, and accordingly, L = 12 is used as an example for explanation.

[0130] As shown in the resource configuration parameters in Figure 6(a), the second device needs to transmit on one antenna port P1. CSI-RS resources are shown in the figure as CSI-RS resource 1 to CSI-RS resource 3. The frequency domain resource number k=0+1-1=0 of the REs occupied by these three CSI-RS resources, and the time domain resource numbers l are (12-1+1), (12-2+1), and (12-3+1), i.e., 12, 11, and 10, respectively. In other words, the three CSI-RS resources are carried at the REs corresponding to antenna port P1, frequency domain resource number k=0, and time domain resource number l of 12, 11, and 10, respectively. As shown in the figure, each rectangle represents an RE, and the vertical rectangle represents the RE occupied by CSI-RS resource 1. The CSI-RS resource carried in each rectangle can also be called a CSI-RS resource symbol. The horizontal rectangle represents the RE occupied by CSI-RS resource 2, and the corresponding diagonal rectangle represents the RE occupied by CSI-RS resource 3.

[0131] At symbol times corresponding to different time-domain resource numbers, the beam direction corresponding to each CSI-RS resource is different. The figure illustrates a possible beam direction. Specifically, at symbol times corresponding to l = 10, the CSI-RS resource and the second device's current transmit beam direction are the same. At symbol times corresponding to l = 11 or 12, the CSI-RS resource and the second device's current transmit beam direction are different.

[0132] Optionally, non-CSI-RS resource symbols can be placed on REs other than those occupied by CSI-RS resources. Specifically, as shown in Figure 6(a), white rectangles represent non-CSI-RS resource symbols, which may include but are not limited to AGC symbols, PSCCH control symbols, or PSSCH data symbols. Striped rectangles represent CSI-RS resource symbols. Gray rectangles represent zero-power or gapped GAP symbols.

[0133] FIG6(b) is another schematic diagram of a resource mapping scenario provided by an embodiment of the present invention. The resource configuration parameters used in FIG6(b) are: transmit beam direction K = 5, the number of antenna ports participating in beam training ρ is 2, and the frequency domain density D of CSI-RS resources is 2. It can be seen that the number of antenna ports participating in beam training is 2. For antenna port P1, the number of CSI-RS resources transmitted on it is On antenna port P1, the frequency domain distribution density D of each CSI-RS resource is 2. Taking the first CSI-RS resource carried on P1 as an example, the time domain resource number l = 12 and the frequency domain resource numbers k = 0 and 6 corresponding to this CSI-RS resource are shown as REs in the vertical rectangles in the figure. These are used to carry this first CSI-RS resource, shown as CSI-RS resource 1. Similarly, the REs shown as horizontal rectangles are used to carry the second CSI-RS resource, shown as CSI-RS resource 2. The REs shown as diagonal rectangles are used to carry the third CSI-RS resource, shown as CSI-RS resource 3.

[0134] For antenna port P2, the number of CSI-RS resources transmitted on it is The details are shown in the figure and will not be described here in detail. It should be noted that the beam directions corresponding to each CSI-RS resource are different.

[0135] Second embodiment: The arrangement of CSI-RS resources is comb-shaped, and the number of CSI-RS resource ports X is 2. Considering that the second device will not use more than 2K antenna ports for beam training in K beam directions, Since every two antenna ports can point to one beam direction in the same symbol time, the maximum number of symbols occupied by CSI-RS resources in a single time slot is Similarly, the CSI-RS resources of the present invention are arranged in a comb-like manner in the frequency domain. Specifically, if the CSI-RS resource with a frequency domain density D has the smallest frequency domain resource number k0 within a single resource block, then the resource element RE used by the CSI-RS resource corresponds to the frequency domain resource number in the frequency domain: Referring to the correlation analysis in the first embodiment above, the value range of D is {1, 2, 3, 4, 6}, and The above conclusion also shows that ρ should satisfy ρ≤12, so the value range of ρ is {2, 4, 6, ..., 12}.

[0136] According to the above relationship, the second device may determine the specific carrying positions of the K CSI-RS resources in the CSI-RS resource set in the following possible manner:

[0137] ① For the logical number of the antenna port i∈{1,2,3,...,ρ}, the antenna port corresponding to the logical number i is P i , the following is the antenna port P corresponding to the logical number i∈{1,3,5,...,ρ-1} and i+1 i and P i+1 Conduct detailed analysis.

[0138] ②If or Then at the antenna port P i and P i+1 The number of CSI-RS resources allocated on i for Taking the mth CSI-RS resource as an example, the RE occupied by the mth CSI-RS resource corresponds to a time domain resource number of 1 in the time domain and a frequency domain resource number of k in the frequency domain. The l and k satisfy the following conditions:

[0139] l = L - m + 1;

[0140]

[0141] in k'={0,1}. i∈{1,3,5,...,ρ-1}. Regarding L, all of them refer to the relevant explanations in the first embodiment above and will not be repeated here. In this example, m is less than or equal to M i The value range of m is

[0142] ③If and Then at the antenna port P i and P i+1 The number of CSI-RS resources allocated on i for Taking the mth CSI-RS resource as an example, the RE occupied by the mth CSI-RS resource corresponds to a time domain resource number of 1 in the time domain and a frequency domain resource number of k in the frequency domain. The l and k satisfy the following conditions:

[0143] l = L - m + 1;

[0144]

[0145] in k'={0,1}. The details of i and L are based on the above description in the first embodiment and will not be repeated here. In this example, m is less than or equal to M i The value range of m is

[0146] ④. After i has traversed all values ​​in the set {1, 3, 5, ..., ρ-1}, the second device determines the REs occupied by the K CSI-RS resources. Specifically, it determines the time domain resource number corresponding to each RE occupied by the CSI-RS resource in the time domain, the frequency domain resource number corresponding to each RE in the frequency domain, and the antenna port number corresponding to each RE in the spatial domain. In other words, the second device can determine the REs occupied by each of the two antenna ports carrying the CSI-RS resource.

[0147] It should be noted that the number of ports used by each CSI-RS resource in the present invention is the same, 2. That is, the number of antenna ports required to carry a single CSI-RS resource is 2. Each CSI-RS resource also uses the same code division multiplexing scheme, FD-CDM2, with a given frequency domain density D. The bandwidth occupied by the CSI-RS resource can be the entire bandwidth allocated to the second device. For details regarding the present invention, whether illustrated or not, please refer to the relevant explanation in the first embodiment above and will not be repeated here.

[0148] To help understand, the following two specific examples are used to explain in detail. Figure 7 This is another schematic diagram of a resource mapping scenario provided by an embodiment of the present invention. Figure 7 The resource configuration parameters used by the second device are: transmit beam direction K = 6, the number of antenna ports participating in beam training ρ is 4, and the frequency domain density D of the CSI-RS resource is 3. In particular, the entire time slot is used as the SL time slot, and accordingly, L = 12 is used as an example for explanation.

[0149] As shown in the figure, there are 6 CSI-RS resources corresponding to the 6 beam directions. Among these 6 CSI-RS resources, 3 CSI-RS resources are carried on antenna ports P1 and P2. The other 3 CSI-RS resources are carried on antenna ports P3 and P4. Figure 7 As shown, for antenna ports P1 and P2, the time domain resource number of RE occupied by the first CSI-RS resource (shown as CSI-RS resource 1) is l=12-1+1=12. The frequency domain resource number k={0, 1, 4, 5, 8, 9}, as specifically shown in the vertical rectangle in the figure. The time domain resource number of RE occupied by the second CSI-RS resource (shown as CSI-RS resource 1) is l=12-2+1=11. The frequency domain resource number k={0, 1, 4, 5, 8, 9}, as specifically shown in the horizontal rectangle in the figure. The RE occupied by the third CSI-RS resource (shown as CSI-RS resource 3) is shown in the oblique rectangle in the figure. Similarly, as shown in the figure, the REs occupied by the CSI-RS resources carried by antenna ports P3 and P4 are shown in the figure, and will not be repeated here. In addition, Figure 7 The training beam direction corresponding to each CSI-RS resource is given as an example. This diagram is only an example and does not constitute a limitation. However, the beam direction corresponding to each CSI-RS resource is different.

[0150] The third embodiment: the CSI-RS resources are arranged in a continuous distribution, and the number of ports X of the CSI-RS resources is 1

[0151] Considering that the second device will not use more than K antenna ports for beam training in K beam directions, the number of antenna ports ρ is less than or equal to K, which can be expressed as ρ≤K. Since each antenna port can point to one beam direction in the same symbol time, the maximum number of OFDM symbols occupied by CSI-RS resources in a single time slot is In the embodiment of the present invention, if the frequency domain density D>1RE / port / RB, the CSI-RS resources are arranged in a continuous form in the frequency domain. Specifically, if the minimum frequency domain resource number of the CSI-RS resource with a frequency domain density D in a single resource block is k0, then the frequency domain resource number corresponding to the resource element RE used by the CSI-RS resource in the frequency domain is: {k0, k0+1, k0+2,..., k0+D-1}. Obviously, it is necessary to ensure that D×ρ-1≤11, that is, Therefore, the feasible density of CSI-RS resources is

[0152] According to the above relationship, the second device can determine the specific carrying positions of the K CSI-RS resources in the CSI-RS resource set in the following possible manners:

[0153] ① For the logical number of the antenna port i∈{1,2,3,...,ρ}, the antenna port corresponding to the logical number i is P i , the following is the antenna port P i Take this as an example for detailed analysis.

[0154] ② If mod(K,ρ)≥i or mod(K,ρ)=0, then at antenna port P i The number of CSI-RS resources allocated on i for Taking the mth CSI-RS resource as an example, the RE occupied by the mth CSI-RS resource corresponds to a time domain resource number of 1 in the time domain and a frequency domain resource number of k in the frequency domain. The l and k satisfy the following conditions:

[0155] l = L - m + 1;

[0156]

[0157] in (i-1)×D+1, (i-1)×D+2, ..., i×D-1}. i is the antenna port P iThe logical number. The value range of i is {1, 2, 3,..., ρ}. L is the number of OFDM symbols occupied by the physical layer shared channel in a single time slot, and the value range of L can be {0, 1, 2,..., 13}. In particular, for the sidelink SL, the time domain resource number corresponding to the last symbol of the PSSCH in a time slot can be any one of the following: 12, 9, or other positive integers. Correspondingly, L can be 12, 9, or other positive integers. In this example, m is a positive integer less than or equal to M i and the value range of m is

[0158] ③. If mod(K, ρ) < i and mod(K, ρ) ≠ 0, then the number M of CSI-RS resources allocated on the antenna port P i is i For example, taking the m-th CSI-RS resource, the time domain resource number corresponding to the RE occupied by the m-th CSI-RS resource in the time domain is l, and the frequency domain resource number corresponding to it in the frequency domain is k. The l and k satisfy the following conditions:

[0159] l = L - m + 1;

[0160]

[0161] where (i - 1)×D + 1, (i - 1)×D + 2,..., i×D - 1}, and l and i can be referred to the relevant description in the above text of the embodiment of the present invention. In this example, m is a positive integer less than or equal to M i and the specific value range of m is

[0162] ​​​​​​​The resource configuration parameters used are: transmit beam direction K = 5, the number of antenna ports participating in beam training ρ = 2, and the frequency domain density D of the CSI-RS resources = 2. The CSI-RS resources are arranged in a continuous pattern. Specifically, the entire time slot is used as the SL time slot, and L = 12 is used as an example for the following description.

[0164] like Figure 8 From the resource configuration parameters shown, we can see that: 5 transmission beam directions correspond to 5 CSI-RS resources, and these 5 CSI-RS resources can be transmitted using 2 antenna ports, namely P1 and P2. Specifically, 3 of the CSI-RS resources are carried on antenna port P1, and the other 2 CSI-RS resources are carried on antenna port P2. As shown in the figure, for antenna port P1, the time domain resource number of the RE occupied by the first CSI-RS resource (numbered as CSI-RS resource 1 in the figure) is l=12-1+1=12. The frequency domain resource number k={0,1}, specifically as Figure 8 The second CSI-RS resource (numbered as CSI-RS resource 2) occupies the time domain resource number l=12-2+1=11. The frequency domain resource number k={0,1}, as shown in the figure. Figure 8 The third CSI-RS resource (numbered as CSI-RS resource 3) occupies a time domain resource number of l=12-3+1=10. The frequency domain resource number k={0,1}, as shown in FIG. Figure 7 As shown in the middle oblique striped rectangle.

[0165] For antenna port P2, the time domain resource number of the RE occupied by the first CSI-RS resource (numbered CSI-RS resource 4 in the figure) is l=12-1+1=12, and the frequency domain resource number is k={2, 3}, as specifically shown by the vertical rectangle in the figure. The time domain resource number of the RE occupied by the second CSI-RS resource (numbered CSI-RS resource 5 in the figure) is l=12-2+1=11, and the frequency domain resource number is k={2, 3}, as specifically shown by the horizontal rectangle in the figure. In addition, the transmission beam direction corresponding to each CSI-RS resource in the present invention is only for illustration and does not constitute a limitation.

[0166] Fourth embodiment: The CSI-RS resources are arranged in a continuous distribution, and the number of CSI-RS resource ports X is 2

[0167] Considering that the second device will not use more than 2K antenna ports for K-directional beam training, Since every two antenna ports can point to one beam direction in the same symbol time, the maximum number of symbols occupied by CSI-RS resources in a single time slot is In the embodiment of the present invention, if the frequency domain density D>1RE / port / RB, the CSI-RS resources are arranged in a continuous form in the frequency domain. Specifically, if the minimum frequency domain resource number of the CSI-RS resource with a frequency domain density D in a single resource block is k0, then the frequency domain resource number corresponding to the resource element RE used by the CSI-RS resource in the frequency domain is: {k0, k0+1, k0+2,..., k0+D-1}. Obviously, it is necessary to ensure that D×ρ-1≤11, that is, Therefore, the feasible density of CSI-RS resources is

[0168] According to the above relationship, the second device may determine the specific carrying positions of the K CSI-RS resources in the CSI-RS resource set in the following possible manner:

[0169] ① For the logical number of the antenna port i∈{1,2,3,...,ρ}, the antenna port corresponding to the logical number i is P i , the following is the antenna port P corresponding to the logical number i∈{1,3,5,...,ρ-1} and i+1 i and P i+1 Conduct detailed analysis.

[0170] ②If or Then at the antenna port P i and P i+1 The number of CSI-RS resources allocated on i for Taking the mth CSI-RS resource as an example, the RE occupied by the mth CSI-RS resource corresponds to a time domain resource number of 1 in the time domain and a frequency domain resource number of k in the frequency domain. The l and k satisfy the following conditions:

[0171] l = L - m + 1;

[0172]

[0173] in (i-1)×D+2, (i-1)×D+4, ..., (i+1)×D-2}. i is the antenna port P i The logical number of i∈{1,3,5,...,ρ-1}. L is the number of OFDM symbols occupied by the physical layer shared channel in a single time slot, and the value range of L can be {0, 1, 2,..., 13}. In particular, for the side link SL, the time domain resource number corresponding to the last symbol of PSSCH in a time slot can be any of the following: 12, 9 or other positive integers. Accordingly, L can be 12, 9, or other positive integers. In this example, m is less than or equal to Mi The value range of m is

[0174] ③If and Then at the antenna port P i and P i+1 The number of CSI-RS resources allocated on i for Taking the mth CSI-RS resource as an example, the RE occupied by the mth CSI-RS resource corresponds to a time domain resource number of 1 in the time domain and a frequency domain resource number of k in the frequency domain. The l and k satisfy the following conditions:

[0175] l = L - m + 1;

[0176]

[0177] in (i-1)×D+2, (i-1)×D+4, ..., (i+1)×D-2}. k'={0,1}. l and i can refer to the above description of the embodiment of the present invention. In this example, m is less than or equal to M i The value range of m is

[0178] ④. After i has traversed all values ​​in the set {1, 3, 5, ..., ρ-1}, the second device will determine the REs occupied by the K CSI-RS resources. Specifically, it will determine the time domain resource number corresponding to the RE occupied by each CSI-RS resource in the time domain, the frequency domain resource number corresponding to the RE occupied by each CSI-RS resource in the frequency domain, and the antenna port number corresponding to the spatial domain. In other words, the second device can determine the REs occupied by each of the two antenna ports that carry the CSI-RS resource. For details about the content not shown or described in the present invention, please refer to the relevant description in the second embodiment above, and will not be repeated here.

[0179] To help understand, the following is a detailed description using a specific example. Figure 9 This is another schematic diagram of a resource mapping scenario provided by an embodiment of the present invention. Figure 9 , CSI-RS resources are arranged continuously in the frequency domain, and the resource configuration parameters used by the second device are: transmit beam direction K = 6, the number of antenna ports participating in beam training ρ is 4, the number of CSI-RS resource ports X is 2, and the frequency domain density D of the CSI-RS resources is 3. In particular, the entire time slot is used as the SL time slot, and the relevant content is explained using L = 12 as an example.

[0180] As shown in the figure, there are 6 CSI-RS resources corresponding to the 6 beam directions. Among these 6 CSI-RS resources, 3 CSI-RS resources are carried on antenna ports P1 and P2. The other 3 CSI-RS resources are carried on antenna ports P3 and P4. Figure 9 As shown, for antenna ports P1 and P2, the time domain resource number of the RE occupied by the first CSI-RS resource (numbered CSI-RS resource 1 in the figure) is l=12-1+1=12. The frequency domain resource number k={0, 1, 2, 3, 4, 5}, as specifically shown in the vertical rectangle in the figure. The time domain resource number of the RE occupied by the second CSI-RS resource (numbered CSI-RS resource 1 in the figure) is l=12-2+1. The frequency domain resource number k={0, 1, 2, 3, 4, 5}, as specifically shown in the horizontal rectangle in the figure. The time domain resource number of the RE occupied by the third CSI-RS resource (numbered CSI-RS resource 3 in the figure) is l=12-3+1. The frequency domain resource number k={0, 1, 2, 3, 4, 5}, as specifically shown in the diagonal rectangle in the figure.

[0181] For antenna ports P3 and P4, the time domain resource number of the RE occupied by the first CSI-RS resource (numbered CSI-RS resource 5 in the figure) is l=12-1+1=12, and the frequency domain resource number is k={6, 7, 8, 9, 10, 11}, as shown in the vertical rectangle in the figure. The time domain resource number of the RE occupied by the second CSI-RS resource (numbered CSI-RS resource 6 in the figure) is l=12-2+1=11, and the frequency domain resource number is k={6, 7, 8, 9, 10, 11}, as shown in the horizontal rectangle in the figure. The time domain resource number of the RE occupied by the third CSI-RS resource (numbered CSI-RS resource 7 in the figure) is l=12-3+1=10, and the frequency domain resource number is k={6, 7, 8, 9, 10, 11}, as shown in the diagonal rectangle in the figure.

[0182] It should be noted that the present invention Figure 7 and Figure 9 In the example, the resource configuration parameters used by the second device are the same, but since the CSI-RS resources are arranged differently in the frequency domain, the positions of REs occupied by the CSI-RS resources are also different.

[0183] By implementing the embodiment of the present invention, the device can configure the transmission of CSI-RS resources on p antenna ports to achieve the effect of sending beam training. In actual applications, the second device notifies the first device of the resource configuration parameters in the form of signaling, so that the first device determines the RE occupied by each CSI-RS resource based on the resource configuration parameters, so as to receive the CSI-RS resource at the corresponding RE. Compared with the existing technology, it can solve the problems existing in the existing CSI-RS resource configuration scheme, such as complex configuration, high signaling overhead, and inability to accurately and efficiently implement CSI-RS resource configuration. In addition, the transmission of non-CSI-RS resource symbols is also supported on the REs occupied by non-CSI-RS resources in the time slot, so as to achieve the technical effect of reducing beam training overhead and improving spectrum efficiency.

[0184] The above mainly introduces the solution provided by the embodiment of the present invention from the perspective of the interaction between the first device and the second device. It can be understood that, in order to realize the above functions, each device (specifically the first device or the second device) includes a hardware structure and / or software module corresponding to the execution of each function. In combination with the units and algorithm steps of each example described in the embodiment disclosed in the present invention, the embodiment of the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present invention.

[0185] In the embodiments of the present invention, the functional units of the device can be divided according to the above-mentioned method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into a single processing unit. The above-mentioned integrated units can be implemented in the form of hardware or software functional units. It should be noted that the division of units in the embodiments of the present invention is schematic and is only a logical functional division. In actual implementation, other division methods may be used.

[0186] In the case of integrated units, see Figure 10 FIG. 1 is a schematic diagram of the structure of a communication system provided by an embodiment of the present invention. Figure 10 The communication system may also be referred to as a resource mapping system, and includes a first device 100 and a second device 200.

[0187] The first device 100 includes a processing unit 102 and a communication unit 103. The processing unit 102 is used to control and manage the actions of the first device 100. For example, the processing unit 102 is used to support the first device 100 to perform Figure 4S404, and / or for performing other steps of the technology described herein. The communication unit 103 is used to support communication between the first device 100 and other devices. For example, the communication unit 103 is used to support the first device 100 in receiving a first signaling message sent by a second device, and / or for performing other steps of the technology described herein. Optionally, the first device 100 may further include a storage unit 101 for storing program code and data of the first device 100.

[0188] The second device 200 includes a processing unit 202 and a communication unit 203. The processing unit 202 is used to control and manage the actions of the second device 200. For example, the processing unit 202 is used to support the second device 200 to execute Figure 4 S401 and S402, and / or other steps for performing the technology described in the text. The communication unit 203 is used to support the communication between the second device 200 and other devices, for example, the communication unit 203 is used to support the second device 200 to perform Figure 4 Optionally, the second device 200 may further include a storage unit 101 for storing program codes and data of the second device 200.

[0189] Among them, the processing unit (specifically, the processing unit 102 or the processing unit 202) can be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute the various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication unit (specifically, the communication unit 103 or the communication unit 203) can be a communication interface, a transceiver, a transceiver circuit, etc., wherein the communication interface is a general term and can include one or more interfaces, such as an interface between a terminal device and other devices. The storage unit 101 or 201 can be a memory.

[0190] When the processing unit is a processor, the communication unit is a communication interface, and the storage unit is a memory, the communication system involved in the embodiment of the present invention can be Figure 11 The communication system shown. Figure 10 FIG. 1 is a schematic diagram of another communication system provided by an embodiment of the present invention. Figure 11 The communication system includes a first device 100 and a second device 200.

[0191] The first device 100 includes a processor 112, a communication interface 113 and a memory 111. Optionally, the first device 100 may further include a bus 114. The communication interface 113, the processor 112 and the memory 111 may be interconnected via the bus 114; the bus 114 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus 114 may be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, Figure 10 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0192] The second device 200 includes a processor 213, a communication interface 212, and a memory 211. Optionally, the second device 200 may further include a bus 214. The communication interface 212, the processor 213, and the memory 211 may be interconnected via the bus 214. For details about the bus, please refer to the above description and will not be repeated here.

[0193] above Figure 10 and Figure 11 The specific implementation of the first device and the second device in the system shown can also refer to the relevant content description in the aforementioned method embodiment, which will not be repeated here.

[0194] The steps of the method or algorithm described in conjunction with the disclosure of the embodiments of the present invention can be implemented in hardware or by executing software instructions by a processor. The software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, removable hard disks, compact discs (CD-ROMs), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium can be located in an ASIC. In addition, the ASIC can be located in a user device. Of course, the processor and storage medium can also exist in the user device as discrete components.

[0195] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When executed, the program can include the processes in the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

Claims

1. A resource mapping method, characterized in that: Applied to a first device, the method includes: The first device receives a first signaling message sent by the second device, where the first signaling message carries resource configuration parameters. The resource configuration parameters include one or more of the following: a number X of channels state information reference signal (CSI)-RS resource ports and a frequency domain density D of the CSI-RS resource; a number K of beam directions is a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device; a number p of antenna ports is a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device; Alternatively, the resource configuration parameters include one or more of the following: the number of antenna ports p, and the frequency domain density D of the CSI-RS resource, the number K of the beam directions is a predefined number, or a number defined by a standard, or a number pre-specified by the first device and the second device; the number X of ports of the channel state information reference signal CSI-RS resource is a predefined number, or a number defined by a standard, or a number pre-specified by the first device and the second device; Alternatively, the resource configuration parameter includes a frequency domain density D of the CSI-RS resource, the number of antenna ports p is a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device; the number of beam directions K is a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device; the number of ports X of the channel state information reference signal CSI-RS resource is a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device; The antenna port is the antenna port used by the second device to transmit the CSI-RS resource to train the corresponding beam direction. The number of ports of the CSI-RS resource is the number of antenna ports required to carry a single CSI-RS resource. The frequency domain density is the average number of resource elements (REs) occupied by each port corresponding to the CSI-RS resource in a resource block. The first device determines, according to the resource configuration parameters, the resource elements RE occupied by each CSI-RS resource transmitted by the second device, so as to receive the CSI-RS resource transmitted by the second device at the corresponding RE.

2. The method according to claim 1, wherein The first device determining, according to the resource configuration parameter, a resource element RE occupied by each CSI-RS resource transmitted by the second device includes: The first device obtains an arrangement mode of the CSI-RS resources, where the arrangement mode includes a comb arrangement or a continuous arrangement; The first device determines, based on the arrangement method and the resource configuration parameters, the time domain resource number corresponding to the resource element RE occupied by each CSI-RS resource transmitted by the second device in the time domain, the frequency domain resource number corresponding to the RE in the frequency domain, and the antenna port number used to carry the RE.

3. The method according to claim 2, wherein The arrangement manner is a comb arrangement, and the first device determines, according to the arrangement manner and the resource configuration parameter, a time domain resource number corresponding to a resource element RE occupied by each CSI-RS resource transmitted by the second device in the time domain, a frequency domain resource number corresponding to the RE in the frequency domain, and an antenna port number used to carry the RE, including: If the number of ports X of the CSI-RS resource is 1, the first device determines the antenna port P i The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to a time domain resource number l in the time domain and a frequency domain resource number k in the frequency domain, where l and k satisfy: l = L - m + 1; in, i is the antenna port P i , i is any one of the following value ranges: {1, 2, 3, ..., ρ}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, and m is a positive integer.

4. The method according to claim 2, wherein The arrangement manner is a continuous arrangement, and the first device determines, according to the arrangement manner and the resource configuration parameter, a time domain resource number corresponding to a resource element RE occupied by each CSI-RS resource transmitted by the second device in the time domain, a frequency domain resource number corresponding to the RE in the frequency domain, and an antenna port number used to carry the RE, including: If the number of ports X of the CSI-RS resource is 1, the first device determines the antenna port P i The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to a time domain resource number l in the time domain and a frequency domain resource number k in the frequency domain, where l and k satisfy: l = L - m + 1; in, i is the antenna port P i , i is any one of the following value ranges: {1, 2, 3, ..., ρ}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, and m is a positive integer.

5. The method according to claim 3 or 4, wherein: The first device determines that at antenna port P i The method further includes: The first device determines the antenna port P according to the number K of the beam directions and the number ρ of the antenna ports. i The number M of the CSI-RS resources transmitted i , m is less than or equal to M i A positive integer.

6. The method according to claim 5, wherein The first device determines the antenna port P according to the number K of the beam directions and the number ρ of the antenna ports. i The number of CSI-RS resources transmitted includes: If mod(K,ρ)≥i, or mod(K,ρ)=0, the first device determines the antenna port P i The number M of the CSI-RS resources transmitted i for or, If mod(K, ρ) < i and mod(K, ρ) ≠ 0, the first device determines the number M of CSI-RS resources transmitted on the antenna port P i i as ​ 7. The method according to claim 2, wherein The arrangement manner is a comb arrangement, and the first device determines, according to the arrangement manner and the resource configuration parameter, a time domain resource number corresponding to a resource element RE occupied by each CSI-RS resource transmitted by the first device in the time domain, a frequency domain resource number corresponding to the RE in the frequency domain, and an antenna port number used to carry the RE, including: If the number of ports X of the CSI-RS resource is 2, the number of antenna ports ρ is an even number, and the first device determines the number of antenna ports P. i and P i+1 The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to a time domain resource number l in the time domain and a frequency domain resource number k in the frequency domain, where l and k satisfy: l = L - m + 1; in, k'={0, 1}, i is the antenna port P i , i is any one of the following value ranges: {1, 3, 5, ..., ρ-1}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, and m is a positive integer.

8. The method according to claim 2, wherein The arrangement manner is a continuous arrangement, and the first device determines, according to the arrangement manner and the resource configuration parameter, a time domain resource number corresponding to a resource element RE occupied by each CSI-RS resource transmitted by the second device in the time domain, a frequency domain resource number corresponding to the RE in the frequency domain, and an antenna port number used to carry the RE, including: If the number of ports X of the CSI-RS resource is 2, the number of antenna ports ρ is an even number, and the first device determines the number of antenna ports P. i and P i+1 The RE occupied by the mth CSI-RS resource transmitted on the network corresponds to a time domain resource number l in the time domain and a frequency domain resource number k in the frequency domain, where l and k satisfy: l = L - m + 1; in, ' k={0, 1}, i is the antenna port P i , i is any one of the following value ranges: {1, 3, 5, ..., ρ-1}, L is the time domain resource number corresponding to the last symbol in the physical layer shared channel in a single time slot, and m is a positive integer.

9. The method according to claim 7 or 8, wherein The first device determines that at antenna port P i and P i+1 The method further includes: The first device determines the antenna port P according to the number K of the beam directions and the number ρ of the antenna ports. i and P i+1 The number M of the CSI-RS resources transmitted i , m is less than or equal to M i A positive integer.

10. The method according to claim 9, wherein The first device determines the antenna port P according to the number K of the beam directions and the number ρ of the antenna ports. i and P i+1 The number M of the CSI-RS resources transmitted i include: like or Then determine the antenna port P i and P i+1 The number M of the CSI-RS resources transmitted i for or, like and Then determine the antenna port P i and P i+1 The number M of the CSI-RS resources transmitted i for 11. A resource mapping method, characterized in that: Applied to the second device, the method includes: The second device obtains a resource configuration parameter of the second device, where the resource configuration parameter is used to indicate a resource element RE occupied by each channel state information reference signal CSI-RS resource transmitted by the second device; The resource configuration parameters include one or more of the following: the number X of channels state information reference signal (CSI)-RS resource ports and the frequency domain density D of the CSI-RS resource; the number K of beam directions is a predefined number, a number defined by a standard, or a number pre-defined by the first device and the second device; the number p of antenna ports is a predefined number, a number defined by a standard, or a number pre-defined by the first device and the second device; Alternatively, the resource configuration parameters include one or more of the following: the number of antenna ports p, and the frequency domain density D of the CSI-RS resource, the number K of the beam directions is a predefined number, or a number defined by a standard, or a number pre-specified by the first device and the second device; the number X of ports of the channel state information reference signal CSI-RS resource is a predefined number, or a number defined by a standard, or a number pre-specified by the first device and the second device; Alternatively, the resource configuration parameter includes a frequency domain density D of the CSI-RS resource, the number of antenna ports p is a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device; the number of beam directions K is a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device; the number of ports X of the channel state information reference signal CSI-RS resource is a predefined number, a number defined by a standard, or a number pre-specified by the first device and the second device; The antenna port is the antenna port used by the second device to transmit the CSI-RS resource to train the corresponding beam direction. The number of ports of the CSI-RS resource is the number of antenna ports required to carry a single CSI-RS resource. The frequency domain density is the average number of resource elements (REs) occupied by each port corresponding to the CSI-RS resource in a resource block. The second device sends a first signaling message to the first device, where the first signaling message carries the resource configuration parameter.

12. The method according to claim 11, wherein The second device acquiring the resource configuration information of the second device includes: The second device receives a second signaling message sent by the network device, where the second signaling message carries the resource configuration parameter; The second device parses the second signaling message to obtain the resource configuration parameter.

13. The method according to claim 11, wherein The method further comprises: The second device determines, according to the resource configuration parameter, a resource element RE occupied by each of the CSI-RS resources transmitted by the second device; The second device carries the CSI-RS resource correspondingly at the RE, so as to send the CSI-RS resource to the first device.

14. The method according to claim 13, wherein Determining the resource element RE occupied by each CSI-RS resource transmitted by the second device according to the resource configuration parameter includes: the resource mapping method described in any one of claims 2 to 10 above.

15. A first device, characterized in that: It comprises a processor, a memory, a communication interface and a bus; the processor, the communication interface and the memory communicate with each other via the bus; the communication interface is used to receive and send data; the memory is used to store instructions; the processor is used to call the instructions in the memory and execute the method as described in any one of claims 1 to 10.

16. A second device, characterized in that: It comprises a processor, a memory, a communication interface and a bus; the processor, the communication interface and the memory communicate with each other via the bus; the communication interface is used to receive and send data; the memory is used to store instructions; the processor is used to call the instructions in the memory and execute the method as described in any one of claims 11 to 13.

17. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, wherein the computer program implements the method according to any one of claims 1 to 10 when executed by a processor.

18. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, wherein the computer program implements the method according to any one of claims 11 to 13 when executed by a processor.

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