วิธีการ และอุปกรณ์สำหรับการวัดกำลังที่รับสัญญาณการอ้างอิงไซด์ลิ้งค์, และเครื่องการติดต่อสื่อสาร

Abstract

รูปลักษณ์ของการประดิษฐ์นี้เปิดเผยวิธีการและอุปกรณ์สำหรับการวัดกำลังที่รับสัญญาณการอ้างอิงไซด์ลิ้งค์,และเครื่องการติดต่อสื่อสารวิธีการสำหรับการวัดกำลังที่รับสัญญาณการอ้างอิงไซด์ลิ้งค์ได้รับการใช้ที่มีเครื่องปลายทางและรวมถึง:การกำหนดค่าพอร์ตการวัดค่าสำหรับสัญญาณการอ้างอิงลิ้งค์ด้านข้าง:และการทำให้ได้กำลังที่รับสัญญาณการอ้างอิงซึ่งมีพื้นฐานบนพอร์ตการวัดค่าที่กำหนดค่า;

Description

Measurement method and device of sidelink reference signal received power, and communication device

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 201911350899.9, filed in China on December 24, 2019, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of communication, in particular to a measurement method and device of sidelink reference signal received power, and a communication device. BACKGROUND

[0004] In sidelink (SL) of related technologies, RSRP measurement based on SL PSSCH DMRS is supported, and the RSRP obtained by measurement can be used as a reference to calculate the path loss, which can be used for SL open-loop power control and for judging whether the resource is occupied in the autonomous resource selection mode (mode 2).

[0005] When performing RSRP measurement, if two-port or two-layer transmission DMRS is used, the sending terminal cannot measure the level of RSRP detected by the receiving terminal, which leads to inaccurate calculation of path loss, and may result in unbalanced effects after different link compensation, or resource selection collision caused by inaccurate detection, thereby degrading the system throughput performance.

[0006] SUMMARY

[0007] Embodiments of the present application provide a measurement method and device of sidelink reference signal received power, and a communication device, which can ensure the throughput of a communication system.

[0008] In a first aspect, embodiments of the present application provide a measurement method of sidelink reference signal received power, applied to a terminal, comprising:

[0009] determining a measurement port of a sidelink reference signal;

[0010] obtaining a reference signal received power based on the determined measurement port.

[0011] In a second aspect, the embodiments of the present application further provide a sidelink reference signal received power measurement device, applied to a terminal, comprising:

[0012] a processing module configured to determine a measurement port of the sidelink reference signal;

[0013] an obtaining module configured to obtain the reference signal received power based on the determined measurement port.

[0014] In a third aspect, the embodiments of the present application further provide a communication device, which comprises a processor, a memory, and a computer program stored in the memory and running on the processor, and the processor implements the steps of the sidelink reference signal received power measurement method as described above when executing the computer program.

[0015] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the sidelink reference signal received power measurement method as described above.

[0016] In a fifth aspect, the embodiments of the present application provide a computer program product, which is executed by at least one processor to implement the sidelink reference signal received power measurement method as described above.

[0017] In a sixth aspect, the embodiments of the present application provide a sidelink reference signal received power measurement device, which is configured to execute the sidelink reference signal received power measurement method as described above.

[0018] In the above scheme, the measurement port of the sidelink reference signal is determined, the reference signal received power is obtained based on the determined measurement port, the obtained reference signal received power can accurately measure the communication condition of the receiving end, the obtained reference signal received power can be used as a reference power for calculating the path loss, and can be used for power control, judging available resources in the autonomous resource selection mode, etc., thereby optimizing the interference between systems and improving the throughput of the communication system. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] FIG. 1 shows a mobile communication system block diagram to which the embodiments of the present application can be applied;

[0021] Figure 2 shows a flow chart of a method for measuring the sidelink reference signal received power of the terminal according to an embodiment of the present application;

[0022] Figure 3 shows a schematic diagram of a module structure of the terminal according to an embodiment of the present application;

[0023] Figure 4 shows a block diagram of the terminal according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] Exemplary embodiments of the present application will be described hereinafter with reference to the accompanying drawings. While exemplary embodiments of the present application are shown, it should be understood that the present application can be embodied in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0025] The terms "first", "second", and the like, in the description presented herein and in the claims that follow are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of such terms is merely for distinguishing between the elements being described and not necessarily for describing a particular order or sequence. Furthermore, the terms "comprise", "include", "have" and any variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, system, product or apparatus that comprises, includes or has a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, system, product or apparatus. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0026] The technology described herein is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, and can also be used for various wireless communication systems such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system can implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. UTRA includes Wideband-CDMA (WCDMA) and other variants of CDMA. A TDMA system can implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA system can implement a radio technology such as Ultra Mobile Broadband (UMB), Evolution-UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS). LTE and LTE-A are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2).The techniques described herein can be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. The description above, however, describes a NR system for purposes of example, and NR terminology is used in much of the description above, although the techniques are applicable beyond NR systems.

[0027] The following description provides examples, and is not limiting of the scope, applicability, or configuration set forth in the claims. Changes can be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples can omit, substitute, or add various procedures or components as appropriate. For instance, the methods described can be performed in an order different from that described, and various steps can be added, omitted, or combined. Also, features described with respect to certain examples can be combined in other examples.

[0028] Please refer to FIG. 1, which shows a block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as a terminal device or a user terminal (User Equipment, UE). The terminal 11 can be a terminal-side device such as a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a mobile Internet device (MID), a wearable device, or a vehicle-mounted device. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can be a base station or a core network. The base station can be a base station of 5G and later versions (for example, gNB, 5G NR NB, etc.), or a base station in other communication systems (for example, eNB, WLAN access point, or other access points, etc.), or a location server (for example, E-SMLC or LMF (Location Manager Function)). The base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the art, as long as the same technical effects are achieved. The base station is not limited to a specific technical term, and only a base station in an NR system is taken as an example in the embodiments of the present application, but the specific type of the base station is not limited.

[0029] The base station can communicate with the terminal 11 under the control of a base station controller, which can be part of the core network or certain base stations in various examples. Some of the base stations can communicate control information or user data with the core network via backhaul. In some examples, some of these base stations can communicate, directly or indirectly, with one another over the backhaul links, which can be wired or wireless communication links. The wireless communication system can support operation on multiple carriers (different frequency waveform signals). Multi-carrier transmitters can transmit modulated signals simultaneously on the multiple carriers. For example, each communication link can be a multi-carrier signal modulated according to the various radio technologies. Each modulated signal can be sent on a different carrier and can carry control information (e.g., reference signals, control channels, etc.), overhead information, data, etc.

[0030] A base station can communicate wirelessly with terminal 11 via one or more access point antennas. Each base station can provide communication coverage for its respective coverage area. The coverage area for an access point can be divided into sectors making up only a portion of the coverage area. The wireless communication system can include base stations of different types (e.g., macro, micro, or pico base stations). The base stations can utilize different radio technologies, such as cellular or WLAN radio access technologies. Base stations can be associated with the same or different access networks or operator deployments. The coverage areas of different base stations, including coverage areas of the same or different types of base stations, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks, can overlap.

[0031] Communication links in a wireless communication system can include uplink for carrying Uplink (UL) transmissions (e.g., from a terminal 11 to a network-side device 12), or downlink for carrying Downlink (DL) transmissions (e.g., from a network-side device 12 to a terminal 11), or sidelink for carrying transmissions between terminals 11. UL transmissions can also be referred to as reverse link transmissions, while DL transmissions can also be referred to as forward link transmissions. Downlink transmissions can be made using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions can be made using licensed frequency bands, unlicensed frequency bands, or both.

[0032] Long Term Evolution (LTE) systems support SL for data transmission between User Equipments (UEs) without going through network devices.

[0033] The design of LTE sidelink is suitable for specific public safety scenarios (e.g., emergency communication in fire sites or disaster sites such as earthquakes) or vehicle to everything (V2X) communication, etc. V2X communication includes various services, such as basic safety class communication, advanced (automatic) driving, platooning, sensor extension, etc. Since LTE sidelink only supports broadcast communication, it is mainly used for basic safety class communication, and other advanced V2X services with strict Quality of Service (QoS) requirements in terms of latency, reliability, etc. will be supported by New Radio (NR) sidelink.

[0034] A UE transmits sidelink control information (SCI) through a physical sidelink control channel (PSCCH) to schedule a transmission of a physical sidelink shared channel (PSSCH) to transmit data.

[0035] Sidelink transmission mainly includes broadcast, groupcast, and unicast: unicast is one-to-one transmission; groupcast is one-to-many transmission; broadcast is also one-to-many transmission, but broadcast does not have the concept of UEs belonging to the same group.

[0036] In sidelink of the related art, RSRP measurement based on SL PSSCH DMRS is supported, which can be used as reference power for calculating path loss, and can be used for SL open-loop power control, judging whether resources are occupied in mode 2, etc.

[0037] L1 RSRP is measured at a PSCCH port and / or a PSSCH port, and L3 RSRP is a weighted L1 RSRP measured by a terminal within a period of time.

[0038] The RSRP used for open-loop power control is L3 RSRP measured and reported by the terminal, the L3 RSRP used for power control is a weighted L1 RSRP based on PSSCH port measurement or PSCCH port measurement, the value of L1 RSRP used for judging whether resources are occupied in mode 2 is an L1 RSRP based on PSCCH port measurement or PSSCH port measurement, and the higher layer configuration is based on PSCCH port or PSSCH port for measurement.

[0039] NR V2X defines two modes, mode 1, base station schedules resources, mode 2, UE decides by itself what resources to use for transmission, at this time the resource information may come from the broadcast message of the base station or pre-configuration. In the mode 2 resource allocation mode, the sending terminal needs to perform detection (sensing), including demodulating SCI, obtaining an RSRP threshold value, comparing the measured RSRP value with the obtained RSRP threshold value, and judging whether the resource is occupied.

[0040] In related technologies, open-loop power control on SL is adjusted based on the L3 RSRP reported by the terminal. RSRP is measured based on PSSCH DMRS. PSSCH DMRS can be indicated by SCI as single-port transmission or two-port transmission. When performing RSRP measurement, if based on two-port transmission DMRS, the terminal needs to define whether to measure based on one of the ports or based on both ports. Otherwise, the sending end cannot measure the level of RSRP detected by the receiving end based on the reported results, which may cause different link compensation effects to be unbalanced, and the system throughput performance to be poor.

[0041] In a period of time, the sending end may be single-port transmission at some time and two-port transmission at some time. When the receiving terminal calculates L3 RSRP, it needs to define the measurement result based on which port to be weighted. Otherwise, the sending end cannot accurately estimate the level of RSRP detected by the receiving end, resulting in inaccurate SL open-loop power control, which makes the interference coordination in the system not good, and the system throughput performance is poor.

[0042] In addition, under mode 2 resource allocation, the higher layer configures whether SL L1 RSRP is measured based on PSCCH DMRS or PSSCH DMRS. If based on PSSCH DMRS, as described above, PSSCH DMRS can be configured as single-port or two-port, and the terminal needs to define whether to measure based on one of the ports or based on both ports as the measurement value of L1 RSRP, and compare it with the indicated RSRP threshold value to judge whether the resource is excluded. If not defined, the sending terminal cannot measure the level of detected RSRP, resulting in inaccurate resource exclusion results. Resources that may cause more serious interference are reserved, resulting in resource collision, causing the system throughput to decrease.

[0043] In summary, when performing RSRP measurement, if the two-port or two-layer transmission DMRS is used, the terminal needs to define whether to perform measurement based on one of the ports or both ports. Otherwise, the sending end cannot measure the level of RSRP detected by the receiving end, resulting in inaccurate calculation of the road loss, which may cause uneven effects after different link compensation, or detection inaccuracy leading to resource selection collision, thereby degrading the system throughput performance.

[0044] The embodiment of the application provides a sidelink reference signal received power measurement method, which is applied to a terminal, as shown in FIG. 2, and includes the following steps:

[0045] Step 101: determining a measurement port of a sidelink reference signal;

[0046] Step 102: obtaining a reference signal received power based on the determined measurement port.

[0047] In the embodiment, the measurement port of the sidelink reference signal is determined, the reference signal received power is obtained based on the determined measurement port, and the obtained reference signal received power can accurately measure the communication condition of the receiving end. The obtained reference signal received power can be used for power control, judgment of available resources in an autonomous resource selection mode, and the like, thereby optimizing the interference between systems and improving the throughput of the communication system.

[0048] Optionally, the measurement port is any one of the following:

[0049] a measurement port determined according to sidelink configuration information;

[0050] a predefined measurement port.

[0051] In the embodiment, the measurement port includes a physical sidelink control channel (PSCCH) port and / or a physical sidelink shared channel (PSSCH) port.

[0052] Optionally, the sidelink configuration information includes at least one of the following:

[0053] physical sidelink shared channel (PSSCH) configuration information;

[0054] reference signal configuration information;

[0055] physical sidelink control channel (PSCCH) configuration information.

[0056] In the embodiment of the application, the sidelink configuration information is for a first object, and the first object uses at least one of the following:

[0057] a bandwidth part;

[0058] a resource pool;

[0059] Sidelink;

[0060] Terminal.

[0061] The sidelink configuration information can be configured in units of bandwidth parts, different sidelink configuration information is configured for different bandwidth parts; the sidelink configuration information can also be configured in units of resource pools, different sidelink configuration information is configured for different resource pools; the sidelink configuration information can also be configured in units of sidelinks, different sidelink configuration information is configured for different sidelinks; and the sidelink configuration information can also be configured in units of terminals, different sidelink configuration information is configured for different terminals.

[0062] In an example embodiment of the application, the sidelink configuration is single-port transmission and / or single-layer transmission, and the measurement port is any one of the following:

[0063] The port with the lowest port number;

[0064] The port with the highest port number;

[0065] The port with the preconfigured port number;

[0066] For example, based on PSSCH and / or DMRS port 1000 to measure PSSCH RSRP and / or DMRS RSRP and / or L1 RSRP.

[0067] Wherein, the port number is defined based on PSSCH. DMRS represents the port of PSSCH. The port number and the port of PSSCH DMRS are one-to-one corresponding. Therefore, here the PSSCH is configured with a single port, that is, the PSSCH DMRS is configured with a single port.

[0068] Optionally, the reference signal received power includes layer 1 reference signal received power L1 RSRP, and the measurement result of L1 RSRP is the linear average value of the energy on the resource element (RE) carrying the reference signal (for example: DMRS) at the configured measurement time-frequency position.

[0069] Optionally, the reference signal received power further includes layer 3 reference signal received power L3 RSRP, which is obtained by weighting and calculating L1 RSRP using a pre-defined, or pre-configured, or configured filtering formula and / or filtering coefficient.

[0070] Optionally, the L1 RSRP used to calculate L3 RSRP adopts at least one of the following:

[0071] The RSRP measurement value within the single-port transmission opportunity;

[0072] RSRP measurement value within a multi-port transmission opportunity.

[0073] The L1 RSRP used to calculate the L3 RSRP employs at least one of the following:

[0074] RSRP measurement values ​​within at least N transmission opportunities, where N is a predefined, preconfigured, or configured integer that can be preconfigured or configured by the terminal or base station;

[0075] The RSRP measurement values ​​within a predefined, preconfigured, or configured measurement period can be preconfigured or configured by the terminal or base station.

[0076] In another exemplary embodiment of the present invention, the side link is configured with multi-port transmission and / or multi-layer transmission, wherein the measurement port is any one of the following:

[0077] Configure all ports used for sidelink transmission;

[0078] Multiple ports out of all ports configured for sidelink transmission;

[0079] One of the ports configured for sidelink transmission;

[0080] For example, PSSCH RSRP and / or DMRS RSRP and / or L1 RSRP can be measured based on PSSCH and / or DMRS ports 1000 and 1001.

[0081] Optionally, the port is any of the following:

[0082] The port with the lowest port number;

[0083] The port with the highest port number;

[0084] A port with a pre-configured port number.

[0085] Optionally, the reference signal received power includes L1 RSRP. If the measurement port is multiple ports, and the multiple ports adopt a code division multiple access multiplexing method, the L1 RSRP is any one of the following:

[0086] The RSRP measurements from the multiple ports are first combined and then averaged to obtain the result.

[0087] The RSRP measurements from the multiple ports are first averaged and then combined.

[0088] The RSRP measurement value of one of the ports is obtained by multiplying it by a preset coefficient.

[0089] The average can be an arithmetic average, a geometric average, or a harmonic average, etc. The RSRP measurement value is a linear average of the energy of the REs carrying DMRS at the configured measurement time-frequency location. Specifically, when calculating L1 RSRP, the RSRP values of multiple ports or the RSRP values of multiple layers measured can be combined first, and then a linear average of the energy of the REs carrying DMRS at the configured measurement time-frequency location is calculated; or, conversely, a linear average of the energy of the REs carrying DMRS at the configured measurement time-frequency location is calculated first, and then the RSRP values of multiple ports or the RSRP values of multiple layers are combined.

[0090] Optionally, the reference signal received power includes L1 RSRP, if the measurement port is one of the multiple ports, and the multiple ports use multiplexing of time division multiple access or frequency division multiple access, the L1 RSRP is an average of the RSRP measurement values of the multiple ports or the RSRP measurement value of one of the ports, wherein the measurement result of L1 RSRP is a linear average of the energy of the REs carrying reference signals (for example: DMRS) at the configured measurement time-frequency location.

[0091] The one of the multiple ports is any one of the following:

[0092] The port with the lowest port number in the multiple ports;

[0093] The port with the highest port number in the multiple ports;

[0094] The port with a preconfigured port number in the multiple ports.

[0095] Optionally, the reference signal received power includes L1 RSRP, if the measurement port is one of the multiple ports, and the multiple ports use multiplexing of time division multiple access or frequency division multiple access, the L1 RSRP is an average of the RSRP measurement values of the multiple ports or the RSRP measurement value of one of the ports, wherein the measurement result of L1 RSRP is a linear average of the energy of the REs carrying reference signals (for example: DMRS) at the configured measurement time-frequency location.

[0096] The port uses multiplexing of code division multiple access;

[0097] The sidelink configures multiple-port transmission, such as configuring the port 1000 or 1001 for measurement;

[0098] The sidelink configures multiple-layer transmission.

[0099] Optionally, the preset coefficient is any one of the following:

[0100] A predefined value;

[0101] A preconfigured value;

[0102] A configured value;

[0103] a value related to the number of ports;

[0104] a value related to the number of layers;

[0105] a number of CDM multiplexing, such as FD-CDM2, i.e., CDM multiplexing in frequency domain, and the number of multiplexing is 2, and the preset coefficient is 2.

[0106] Optionally, the reference signal received power further includes L3 RSRP, and the L3 RSRP is obtained by performing weighted calculation on the L1 RSRP by using a predefined or preconfigured or configured filtering formula.

[0107] Optionally, the L1 RSRP used for calculating the L3 RSRP adopts at least one of the following:

[0108] an RSRP measurement value in a single-port transmission opportunity;

[0109] an RSRP measurement value in a multi-port transmission opportunity.

[0110] Optionally, the L1 RSRP used for calculating the L3 RSRP adopts at least one of the following:

[0111] an RSRP measurement value in at least N transmission opportunities, N being a predefined, preconfigured or configured integer, and N can be preconfigured or configured by the terminal or the base station;

[0112] an RSRP measurement value in a predefined, preconfigured or configured measurement period, and the measurement period can be preconfigured or configured by the terminal or the base station.

[0113] Optionally, the number of configured transmission opportunities can be independently configured for a third object, and the third object adopts any one of the following:

[0114] single-port transmission;

[0115] multi-port transmission;

[0116] single-port transmission and multi-port transmission;

[0117] single-layer and multi-layer transmission;

[0118] per resource pool.

[0119] Optionally, the filtering formula and / or the filtering coefficient are for a second object, and the second object adopts at least one of the following:

[0120] bandwidth part;

[0121] resource pool;

[0122] sidelink;

[0123] terminal.

[0124] The filtering formula and / or filtering coefficient can be configured in units of bandwidth parts, different filtering formula and / or filtering coefficients are configured for different bandwidth parts; the filtering formula and / or filtering coefficient can also be configured in units of resource pools, different filtering formula and / or filtering coefficients are configured for different resource pools; the filtering formula and / or filtering coefficient can also be configured in units of sidelinks, different filtering formula and / or filtering coefficients are configured for different sidelinks; the filtering formula and / or filtering coefficient can also be configured in units of terminals, different filtering formula and / or filtering coefficients are configured for different terminals.

[0125] In an embodiment of the present application, the sidelink reference signal received power measurement method comprises the following steps:

[0126] The DMRS transmitted on port 1000 is predefined for DMRS RSRP determination.

[0127] The terminal demodulates the SCI to obtain the port configuration information and / or DMRS configuration information.

[0128] If the PSSCH is single-port transmission, the measurement result of the DMRS RSRP measured on port 1000 is the linear average of the energy on the RE carrying the DMRS at the configured measurement time-frequency position, which is the measurement result of the layer 1 (L1) RSRP at this time.

[0129] If the PSSCH is two-port transmission, the measurement result of the DMRS RSRP measured on port 1000 is the linear average of the energy on the RE carrying the DMRS at the configured measurement time-frequency position, and the actual measured energy, i.e., the doubled RSRP measurement value, is the measurement result of the L1 RSRP at this time.

[0130] According to the predefined filtering formula for calculating the L3 RSRP and the preconfigured filtering coefficient, the value of the L3 RSRP is calculated, and the calculated L3 RSRP is reported to the sending terminal.

[0131] Further, the L1 RSRP values at different times can be weighted. If it is two-port CDM, the L1 RSRP is twice the DMRS RSRP measurement value on the single port.

[0132] If the sending terminal measures the RSRP for sensing to determine whether the resource is available, the value of the L1 RSRP can be determined according to the above method.

[0133] In another embodiment of the present application, the sidelink reference signal received power measurement method comprises the following steps:

[0134] The predefined ports 1000 and 1001 can be used for PSSCH RSRP measurement.

[0135] The terminal receives SCI, and obtains port configuration information and / or DMRS configuration information.

[0136] If the PSSCH DMRS is transmitted on a single port, the measurement result of the DMRS RSRP measurement on the port 1000 is the linear average value of the energy on the RE carrying the DMRS at the configured measurement time-frequency position, that is, the RSRP measurement value, which is the measurement result of the L1 RSRP at this moment.

[0137] If the PSSCH is two-port transmission, the measurement result of the DMRS RSRP measurement on the ports 1000 and 1001 is the linear average value of the energy on the RE carrying the DMRS at the configured measurement time-frequency position, and the measurement results of the port 1000 and the port 1001 are combined, and the combined value is the measurement result of the L1 RSRP at this moment.

[0138] According to the predefined filtering formula for calculating L3 RSRP and the preconfigured filtering coefficient, the value of L3 RSRP is calculated, and the calculated L3 RSRP is reported to the sending terminal.

[0139] Further, the L1 RSRP values at different moments can be weighted. When two-port transmission, the L1 RSRP is the combined value of the DMRS RSRP measurement values of the two ports.

[0140] If the sending terminal measures RSRP for sensing to determine whether the resource is available, the value of L1 RSRP can be determined according to the above method.

[0141] In another specific embodiment of the present application, the sidelink reference signal received power measurement method comprises the following steps:

[0142] The predefined port 1000 is used for PSSCH RSRP measurement.

[0143] The terminal receives SCI, and obtains port configuration information and / or DMRS configuration information.

[0144] If the PSSCH DMRS is transmitted on a single port, the measurement result of the DMRS RSRP measurement on the port 1000 is the linear average value of the energy on the RE carrying the DMRS at the configured measurement time-frequency position, that is, the RSRP measurement value, which is the measurement result of the L1 RSRP at this moment.

[0145] According to a predefined filtering formula for calculating L3 RSRP and a preconfigured filtering coefficient for calculating the value of L3 RSRP, the calculated L3 RSRP is reported to the sending terminal.

[0146] Wherein whether to measure and how to measure the two ports depends on the terminal, and only the measurement result in the single-port transmission opportunity is considered when calculating the reporting value of L3 RSRP.

[0147] If the sending end measures RSRP for sensing to determine whether the resource is available, the value of L1 RSRP can be determined according to the above method.

[0148] In another specific embodiment of the present application, the sidelink reference signal received power measurement method comprises the following steps:

[0149] The port 1000 is predefined for PSSCH RSRP measurement.

[0150] The terminal receives SCI to obtain port configuration information and / or DMRS configuration information.

[0151] If the PSSCH DMRS is transmitted on a single port, the measurement result of DMRS RSRP measured on the port 1000 is the linear average value of the energy on the RE carrying the DMRS on the configured measurement time-frequency position, that is, the RSRP measurement value, which is the measurement result of L1 RSRP at this moment.

[0152] If the PSSCH is two-port transmission,

[0153] If the two ports are FDM or TDM multiplexing, the measurement result of DMRS RSRP measured on the port 1000 is the linear average value of the energy on the RE carrying the DMRS on the configured measurement time-frequency position, that is, the RSRP measurement value, which is the measurement result of L1 RSRP at this moment.

[0154] If the two ports are CDM multiplexing, the measurement result of DMRS RSRP measured on the port 1000 is the linear average value of the energy on the RE carrying the DMRS on the configured measurement time-frequency position, that is, the RSRP measurement value, and twice the actual measured RSRP measurement value is the measurement result of L1 RSRP at this moment.

[0155] According to a predefined filtering formula for calculating L3 RSRP and a preconfigured filtering coefficient for calculating the value of L3 RSRP, the calculated L3 RSRP is reported to the sending terminal.

[0156] If the sending end measures RSRP for sensing to determine whether the resource is available, the value of L1 RSRP can be determined according to the above method.

[0157] In another specific embodiment of the present application, the sidelink reference signal received power measurement method comprises the following steps:

[0158] The predefined ports 1000, 1001 can be used for PSSCH RSRP measurement.

[0159] The terminal receives SCI and obtains port configuration information and / or DMRS configuration information.

[0160] If the PSSCH DMRS is transmitted on a single port, the measurement result of the DMRS RSRP measured on the port 1000 is the linear average of the energy on the RE carrying the DMRS at the configured measurement time-frequency location, that is, the RSRP measurement value, which is the measurement result of the L1 RSRP at this moment.

[0161] If the PSSCH is two-port transmission,

[0162] If the two ports are FDM or TDM multiplexing, the measurement result of the DMRS RSRP measured on the port 1000 is the linear average of the energy on the RE carrying the DMRS at the configured measurement time-frequency location, which is the measurement result of the L1 RSRP at this moment.

[0163] If the two ports are CDM multiplexing, the measurement result of the DMRS RSRP measured on the port 1000, 1001 is the linear average of the energy on the RE carrying the DMRS at the configured measurement time-frequency location, and the measurement results of the port 1000 and the port 1001 are combined, and the combined value is the measurement result of the L1 RSRP at this moment.

[0164] According to the predefined calculation formula of L3 RSRP and the preconfigured filtering coefficient, the value of L3 RSRP is calculated, and the calculated L3 RSRP is reported to the sending terminal.

[0165] If the sending terminal measures RSRP for sensing to determine whether the resource is available, the value of L1 RSRP can be determined according to the above method.

[0166] As shown in FIG. 3, the terminal 300 of the embodiment of the present application comprises a sidelink reference signal received power measurement device, which can realize the sidelink reference signal received power measurement method in the above embodiments and achieve the same effect. The terminal 300 specifically comprises the following functional modules:

[0167] The processing module 310 is configured to determine the measurement port of the sidelink reference signal.

[0168] The acquisition module 320 is configured to acquire the reference signal received power based on the determined measurement port.

[0169] In the embodiment, the terminal determines a measurement port of the sidelink reference signal, and obtains a reference signal received power based on the determined measurement port. The obtained reference signal received power can accurately measure the communication condition of the receiving end, and can be used for power control, judgment of available resources in an autonomous resource selection mode, and the like, thereby optimizing the interference between systems and improving the throughput of the communication system.

[0170] Optionally, the measurement port is any one of the following:

[0171] a measurement port determined according to sidelink configuration information;

[0172] a predefined measurement port.

[0173] In the embodiment, the measurement port includes a physical sidelink control channel (PSCCH) port and / or a physical sidelink shared channel (PSSCH) port.

[0174] Optionally, the sidelink configuration information includes at least one of the following:

[0175] PSSCH configuration information;

[0176] reference signal configuration information;

[0177] PSCCH configuration information.

[0178] The sidelink configuration information is for a first object, and the first object adopts at least one of the following:

[0179] a bandwidth part;

[0180] a resource pool;

[0181] a sidelink;

[0182] a terminal.

[0183] In an example embodiment of the application, the sidelink configuration is single-port transmission and / or single-layer transmission, and the measurement port is any one of the following:

[0184] a port with the lowest port number;

[0185] a port with the highest port number;

[0186] a port with a preconfigured port number;

[0187] For example, PSSCH RSRP and / or DMRS RSRP and / or L1 RSRP measurement is performed based on PSSCH and / or DMRS port 1000.

[0188] Wherein, the port number is defined based on the PSSCH. The DMRS represents the port of the PSSCH. The port number and the port of the PSSCH DMRS are one-to-one corresponding. Therefore, the PSSCH is configured with a single port, that is, the PSSCH DMRS is configured with a single port.

[0189] Optionally, the reference signal received power includes a layer 1 reference signal received power L1 RSRP, and a measurement result of the L1 RSRP is a linear average value of energy on resource elements (REs) carrying reference signals (for example, DMRS) at configured measurement time-frequency positions.

[0190] Optionally, the reference signal received power further includes a layer 3 reference signal received power L3 RSRP, and the L3 RSRP is obtained by performing weighted calculation on the L1 RSRP by using a predefined, or preconfigured, or configured filtering formula and / or filtering coefficient.

[0191] Optionally, the L1 RSRP used for calculating the L3 RSRP adopts at least one of the following:

[0192] An RSRP measurement value in a single-port transmission opportunity;

[0193] An RSRP measurement value in a multi-port transmission opportunity.

[0194] Optionally, the L1 RSRP used for calculating the L3 RSRP adopts at least one of the following:

[0195] An RSRP measurement value in at least N transmission opportunities, N is a predefined, preconfigured, or configured integer, and N can be preconfigured or configured by a terminal or a base station;

[0196] An RSRP measurement value in a predefined, preconfigured, or configured measurement period, and the measurement period can be preconfigured or configured by a terminal or a base station.

[0197] In another exemplary embodiment of the present application, the sidelink is configured with multi-port transmission and / or multi-layer transmission, and the measurement port is any one of the following:

[0198] All ports configured for sidelink transmission;

[0199] A plurality of ports configured for sidelink transmission;

[0200] One port of all ports configured for sidelink transmission;

[0201] For example, the PSSCH RSRP and / or the DMRS RSRP and / or the L1 RSRP can be measured based on the PSSCH and / or the DMRS ports 1000 and 1001.

[0202] Optionally, the one port is any of the following:

[0203] a port with the lowest port number;

[0204] a port with the highest port number;

[0205] a port with a preconfigured port number.

[0206] Optionally, the reference signal received power includes L1 RSRP, if the measurement port is a plurality of ports, and the plurality of ports uses code division multiplexing, the L1 RSRP is any of the following:

[0207] the RSRP measurement values of the plurality of ports are first combined and then averaged;

[0208] the RSRP measurement values of the plurality of ports are first averaged and then combined;

[0209] the RSRP measurement value of one of the ports is multiplied by a preset coefficient to obtain.

[0210] Wherein, the average can be arithmetic mean, geometric mean or harmonic mean, etc. The RSRP value is the linear average value of the energy of the RE carrying DMRS at the configured measurement time-frequency position. Specifically, when calculating L1 RSRP, the plurality of port RSRP values or the plurality of layer RSRP values obtained by measurement can be first combined, and then the linear average value of the energy of the RE carrying DMRS at the configured measurement time-frequency position is calculated; or, conversely, the linear average value of the energy of the RE carrying DMRS at the configured measurement time-frequency position is first calculated, and then the plurality of port RSRP values or the plurality of layer RSRP values are combined.

[0211] Optionally, the reference signal received power includes L1 RSRP, if the measurement port is a plurality of ports, and the plurality of ports uses time division multiplexing or frequency division multiplexing, the L1 RSRP is the average of the RSRP measurement values of the plurality of ports or the RSRP measurement value of one of the ports, wherein the measurement result of L1 RSRP is the linear average value of the energy of the RE carrying reference signal (for example: DMRS) at the configured measurement time-frequency position.

[0212] Wherein, one of the plurality of ports is any of the following:

[0213] a port with the lowest port number in the plurality of ports;

[0214] a port with the highest port number in the plurality of ports;

[0215] The ports in the plurality of ports have a preconfigured port number.

[0216] Optionally, the reference signal received power includes L1 RSRP, if the measurement port is one of all configured ports for sidelink transmission, the L1 RSRP is equal to the RSRP measurement value measured at the port multiplied by a preset coefficient when any of the following conditions is met.

[0217] The ports use code division multiplexing;

[0218] Sidelink configuration multi-port transmission, such as configuration measurement with port 1000 or 1001;

[0219] Sidelink configuration multi-layer transmission.

[0220] Optionally, the preset coefficient is any of the following:

[0221] A predefined value;

[0222] A preconfigured value;

[0223] A configured value;

[0224] A value related to the number of ports;

[0225] A value related to the number of layers;

[0226] The number of CDM multiplexing, such as FD-CDM2, that is, CDM multiplexing in the frequency domain, the multiplexing number is 2, and the preset coefficient is 2.

[0227] Optionally, the reference signal received power further includes L3 RSRP, which is obtained by weighting calculation on L1 RSRP using a predefined, or preconfigured, or configured filtering formula.

[0228] Optionally, the L1 RSRP used to calculate L3 RSRP uses at least one of the following:

[0229] The RSRP measurement value within a single-port transmission opportunity;

[0230] The RSRP measurement value within a multi-port transmission opportunity.

[0231] Wherein, the L1 RSRP used to calculate L3 RSRP uses at least one of the following:

[0232] The RSRP measurement value within at least N transmission opportunities, N is a predefined, preconfigured or configured integer, which can be preconfigured or configured by the terminal or the base station;

[0233] The RSRP measurement value in the predefined, preconfigured or configured measurement period can be preconfigured or configured by the terminal or the base station.

[0234] The number of configured transmission opportunities can be independently configured for the third object, and the third object adopts any one of the following:

[0235] Single-port transmission;

[0236] Multi-port transmission;

[0237] Single-port transmission and multi-port transmission;

[0238] Single-layer and multi-layer transmission;

[0239] Per resource pool.

[0240] Optionally, the filtering formula and / or the filtering coefficient are for a second object, and the second object adopts at least one of the following:

[0241] Bandwidth part;

[0242] Resource pool;

[0243] Side link;

[0244] Terminal.

[0245] To better achieve the above object, further, Fig. 4 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present application. The terminal 40 includes but is not limited to a radio frequency unit 41, a network module 42, an audio output unit 43, an input unit 44, a sensor 45, a display unit 46, a user input unit 47, an interface unit 48, a memory 49, a processor 410, and a power supply 411, and the like. Those skilled in the art can understand that the terminal structure shown in Fig. 4 does not constitute a limitation on the terminal, and the terminal can include more or fewer components than the illustration, or combine certain components, or different component arrangements. In the embodiments of the present application, the terminal includes but is not limited to a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, and a pedometer, and the like.

[0246] The processor 410 is configured to determine a measurement port of a side link reference signal, and obtain a reference signal received power based on the determined measurement port.

[0247] It should be appreciated that in the embodiments of the present application, the radio frequency unit 41 can be used for receiving and sending signals in the process of transmitting information or talking. Specifically, after receiving the downlink data from the base station, the radio frequency unit 41 processes the data for the processor 410. In addition, the radio frequency unit 41 sends the uplink data to the base station. Generally, the radio frequency unit 41 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc. In addition, the radio frequency unit 41 can also communicate with the network and other devices through a wireless communication system.

[0248] The terminal provides the user with wireless broadband Internet access through the network module 42, such as helping the user to send and receive emails, browse web pages, and access streaming media, etc.

[0249] The audio output unit 43 can convert audio data received by the radio frequency unit 41 or the network module 42 or stored in the memory 49 into an audio signal and output as sound. Moreover, the audio output unit 43 can also provide audio output related to a specific function performed by the terminal 40 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 43 includes a speaker, a buzzer, a receiver, etc.

[0250] The input unit 44 is used to receive audio or video signals. The input unit 44 can include a graphics processor (GPU) 441 and a microphone 442. The graphics processor 441 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The processed image frame can be displayed on the display unit 46. The image frame processed by the graphics processor 441 can be stored in the memory 49 (or other storage medium) or transmitted via the radio frequency unit 41 or the network module 42. The microphone 442 can receive sound and can process such sound into audio data. The processed audio data can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 41 in the case of a telephone call mode.

[0251] The terminal 40 also includes at least one sensor 45, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, where the ambient light sensor can adjust the brightness of the display panel 461 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 461 and / or the backlight when the terminal 40 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), and when at rest, can detect the magnitude and direction of gravity, and can be used to identify the terminal posture (such as landscape / portrait screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, knock), and the like. The sensor 45 can also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like, which will not be described here.

[0252] The display unit 46 is used to display information input by the user or information provided to the user. The display unit 46 can include a display panel 461, which can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), and the like.

[0253] The user input unit 47 can be used to receive input digital or character information, and to generate key signal input related to user settings and function control of the terminal. Specifically, the user input unit 47 includes a touch panel 471 and other input devices 472. The touch panel 471, also known as a touch screen, can collect user touch operations (such as user operations on or near the touch panel 471 using a finger, a stylus, or any suitable object or accessory) on or near it. The touch panel 471 can include two parts, a touch detection device and a touch controller. The touch detection device detects the user's touch position and detects the signals generated by the touch operation, and transmits the signals to the touch controller; the touch controller receives touch information from the touch detection device, and converts it into touch coordinates, and sends it to the processor 410, receives commands from the processor 410 and executes them. In addition, the touch panel 471 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 471, the user input unit 47 can also include other input devices 472. Specifically, the other input devices 472 can include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, on / off buttons, etc.), trackballs, mice, joysticks, and the like, which will not be described here.

[0254] Further, the touch panel 471 can be overlaid on the display panel 461, and when the touch panel 471 detects a touch operation thereon or in the vicinity thereof, it transmits the touch event to the processor 410 to determine the type of the touch event, and then the processor 410 provides a corresponding visual output on the display panel 461 according to the type of the touch event. Although in FIG. 4 the touch panel 471 and the display panel 461 are implemented as two independent components to realize the input and output functions of the terminal, in some embodiments, the touch panel 471 and the display panel 461 can be integrated to realize the input and output functions of the terminal, which is not limited here.

[0255] The interface unit 48 is an interface for connecting external devices with the terminal 40. For example, the external devices can include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input / output (I / O) port, a video I / O port, an earphone port, and the like. The interface unit 48 can be used to receive input (e.g., data information, power, and the like) from external devices and transmit the received input to one or more elements within the terminal 40 or can be used to transmit data between the terminal 40 and external devices.

[0256] The memory 49 can be used to store software programs and various data. The memory 49 can mainly include a storage program area and a storage data area, wherein the storage program area can store an operating system, application programs required by at least one function (such as a sound playing function, an image playing function, and the like), and the like; and the storage data area can store data created according to the use of the mobile phone (such as audio data, a phone book, and the like), and the like. In addition, the memory 49 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device.

[0257] The processor 410 is the control center of the terminal, connects all parts of the terminal through various interfaces and lines, executes various functions of the terminal and processes data by running or executing software programs and / or modules stored in the memory 49 and calling data stored in the memory 49, and thus monitors the terminal as a whole. The processor 410 can include one or more processing units; preferably, the processor 410 can integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 410.

[0258] The terminal 40 can further include a power supply 411, such as a battery, for powering the various components of the terminal 40. In preferred embodiments, the power supply 411 is preferably coupled to the processor 410, and is configured to manage and control the power supply to the terminal 40 by a power management system.

[0259] In addition, the terminal 40 includes some function modules which are not shown here and will not be described in detail.

[0260] In preferred embodiments, the terminal further includes a processor 410, a memory 49, and a computer program stored in the memory 49 and executable in the processor 410, which, when executed by the processor 410, implements each process of the above-mentioned sidelink reference signal received power measurement method embodiments and achieves the same technical effects. To avoid repetition, details will not be described here. The terminal can be a wireless terminal or a wired terminal. The wireless terminal can be a device that provides voice and / or other service data connectivity to users, a handheld device with wireless connection function, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks through a radio access network (RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (also known as a "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket, handheld, built-in, or vehicle-mounted mobile device that exchanges language and / or data with a radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and the like. The wireless terminal can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile, remote station, remote terminal, access terminal, user terminal, user agent, user device, or user equipment, without limitation.

[0261] The embodiment of the present application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program. The computer program is executed by a processor to realize each process of the terminal side sidelink reference signal received power measurement method embodiment and achieve the same technical effects. To avoid repetition, details are not described herein. The computer readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0262] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0263] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein.

[0264] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division, and actual implementation can have another division manner. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0265] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., they can be located in one place or distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0266] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0267] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of software products. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network side device, etc.) to execute all or part of the steps of the method described in various embodiments of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various program code storage media.

[0268] In addition, it should be noted that in the device and method of the present application, it is obvious that the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present application. Moreover, the steps of performing the above series of processes can naturally be executed in time sequence according to the order of description, but do not necessarily have to be executed in time sequence. Some steps can be executed in parallel or independently of each other. It can be understood by those skilled in the art that all or any steps or components of the method and device of the present application can be realized in hardware, firmware, software or a combination thereof in any computing device (including a processor, a storage medium, etc.) or a network of computing devices, which can be realized by those skilled in the art using their basic programming skills after reading the description of the present application.

[0269] Therefore, the object of the present application can also be realized by running a program or a set of programs on any computing device. The computing device can be a commonly known general-purpose device. Therefore, the object of the present application can also be realized only by providing a program product containing program code for realizing the method or device. That is, such a program product also constitutes the present application, and a storage medium storing such a program product also constitutes the present application. Obviously, the storage medium can be any commonly known storage medium or any storage medium developed in the future. It should be noted that in the device and method of the present application, it is obvious that the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present application. Moreover, the steps of performing the above series of processes can naturally be executed in time sequence according to the order of description, but do not necessarily have to be executed in time sequence. Some steps can be executed in parallel or independently of each other.

[0270] The above is the preferred embodiment of the present application. It should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements are also within the scope of protection of the present application.

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