CN109639713B - IQ data frame and transmission and receiving method - Google Patents
IQ data frame and transmission and receiving method Download PDFInfo
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- CN109639713B CN109639713B CN201910001337.7A CN201910001337A CN109639713B CN 109639713 B CN109639713 B CN 109639713B CN 201910001337 A CN201910001337 A CN 201910001337A CN 109639713 B CN109639713 B CN 109639713B
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Abstract
The embodiment of the invention provides an IQ data frame and a transmission and receiving method, wherein the IQ data frame comprises a payload unit, the payload unit comprises a control management channel, an IQ data section and a reserved byte section; the IQ data section is composed of IQ data of a preset carrier frequency, and the reserved byte section is composed of IQ data of a candidate carrier frequency; the control management channels in a first preset number of consecutive IQ data frames constitute the underlying link information. The IQ data frame and the method provided by the embodiment of the invention enable the transmission of IQ data to be more flexible and the utilization rate of the effective load to be higher by setting the IQ data section and the available byte section in the effective load unit. In addition, the information of the bottom layer link is dispersed into the control management channels of the first preset number of IQ data frames, so that repeated transmission is avoided, the bandwidth is saved, the utilization rate of the effective load is further improved, and the transmission requirement of the gigabit Ethernet port is met.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to an IQ data frame and a transmission and receiving method.
Background
With the development of wireless communication technology, the carrier bandwidth of wireless signals is wider and wider, the amount of digital baseband IQ (In-phase Quadrature) data transmitted In a network port is larger and larger, and it is inevitable to transmit the digital baseband IQ data by adopting a gigabit ethernet port.
Fig. 1 is a schematic diagram of a hardware structure for transmitting baseband IQ data through a gigabit ethernet interface according to the prior art, where, as shown in fig. 1, a clock distribution module outputs three clocks, which are a digital baseband processing reference clock, an XFI interface reference clock, and a PHY (Port Physical Layer) reference clock, the digital baseband processing reference clock is a reference clock for performing baseband IQ data processing inside an FPGA (Field-Programmable Gate Array), the XFI interface reference clock is a reference clock for operating an XFI interface module inside the FPGA, and the PHY reference clock is a reference clock for performing PHY data processing; the FPGA is connected with the PHY through an XFI interface, and the XFI interface is an electrical interface specification among chips supporting 10Gbps data transmission rate and is used for completing the transmission between the FPGA digital baseband IQ data and the PHY; the PHY is primarily used to perform data conversion between the XFI interface and the gigabit ethernet port.
Generally, a transmission protocol of a gigabit ethernet port is customized based on a Common Public Radio Interface (CPRI) protocol. However, since the actual working line rate of the XFI interface is less than the standard XFI interface line rate, the actual data rate of the gigabit ethernet port is less than 10Gbps of the standard gigabit ethernet port, and the payload of the gigabit ethernet port is not fully utilized.
Disclosure of Invention
The embodiment of the invention provides an IQ data frame and a transmission and receiving method, which are used for solving the problem of insufficient utilization of the effective load of the existing gigabit Ethernet interface.
In a first aspect, an embodiment of the present invention provides an IQ data frame, including a payload unit, where the payload unit includes a control management channel, an IQ data segment, and a reserved byte segment;
the IQ data segment is composed of IQ data of a preset carrier frequency, and the reserved byte section is composed of IQ data of a candidate carrier frequency;
the control management channels in a first preset number of consecutive IQ data frames constitute bottom link information.
In a second aspect, an embodiment of the present invention provides a method for transmitting an IQ data frame, including:
constructing a current IQ data frame based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information; the current IQ data frame is the IQ data frame provided by the first aspect;
and sending the current IQ data frame so that a receiving end receives the current IQ data frame, and acquiring IQ data of the preset carrier frequency, IQ data of the candidate carrier frequency and a part corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
In a third aspect, an embodiment of the present invention provides a method for receiving an IQ data frame, including:
receiving a current IQ data frame sent by a sending end; the current IQ data frame is constructed by the transmitting end based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information, and the current IQ data frame is the IQ data frame provided by the first aspect;
and acquiring IQ data of the preset carrier frequency, IQ data of the candidate carrier frequency and a part corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
In a fourth aspect, the present invention provides an IQ data frame transmission apparatus, including:
the framing module is used for constructing a current IQ data frame based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information; the current IQ data frame is the IQ data frame provided by the first aspect;
and the transmitting module is used for transmitting the current IQ data frame so that the receiving end receives the current IQ data frame and acquires IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information based on the current IQ data frame.
In a fifth aspect, the present invention provides an IQ data frame receiving apparatus, comprising:
a receiving module, configured to receive a current IQ data frame sent by a sending end; the current IQ data frame is constructed by the transmitting end based on the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency and the part corresponding to the current IQ data frame in the bottom link information, and the current IQ data frame is the IQ data frame provided by the first aspect;
and the de-framing module is used for acquiring IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information based on the current IQ data frame.
In a sixth aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a bus, where the processor and the communication interface, the memory complete communication with each other through the bus, and the processor may call logic instructions in the memory to perform the steps of the method as provided in the second aspect or the third aspect.
In a seventh aspect, an embodiment of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the method as provided in the second or third aspect.
According to the IQ data frame and the transmission and receiving method provided by the embodiment of the invention, the IQ data segment and the available byte segment are arranged in the payload unit, so that the transmission of IQ data is more flexible, and the utilization rate of the payload is higher. On the basis, the bottom link information is dispersed into the control management channels of the first preset number of IQ data frames, so that repeated transmission is avoided on the basis of completely transmitting the bottom link information, the bandwidth is saved, more available bytes are provided for IQ data segments and reserved byte segments, the utilization rate of the payload is further improved, and the transmission requirement of the gigabit Ethernet port is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a hardware structure for transmitting baseband IQ data through a gigabit ethernet interface according to the prior art;
fig. 2 is a schematic structural diagram of an IQ data frame according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an IQ data frame according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a payload unit according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating allocation of bottom link information according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating a transmission method of IQ data frames according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a transmission method of IQ data frames according to another embodiment of the present invention;
fig. 8 is a flowchart illustrating a method for receiving an IQ data frame according to an embodiment of the present invention;
fig. 9 is a flowchart illustrating a method for receiving IQ data frames according to another embodiment of the present invention;
fig. 10 is a schematic structural diagram of an IQ data frame transmission apparatus according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an IQ data frame receiving apparatus according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Usually, the transport protocol of the gigabit ethernet port is customized based on the CPRI protocol. However, since the actual working line rate of the XFI interface is less than the standard XFI interface line rate, the actual data rate of the gigabit ethernet port is less than 10Gbps of the standard gigabit ethernet port, and the payload of the gigabit ethernet port is not fully utilized. In order to meet the transmission requirement of the gigabit ethernet port and improve the utilization rate of the payload, embodiments of the present invention provide an IQ data frame, which will be described and explained below with reference to a plurality of embodiments.
Fig. 2 is a schematic structural diagram of an IQ data frame according to an embodiment of the present invention, where, as shown in fig. 2, the IQ data frame includes a payload unit, and the payload unit includes a control management channel, an IQ data segment, and a reserved byte segment; the IQ data section is composed of IQ data of a preset carrier frequency, and the reserved byte section is composed of IQ data of a candidate carrier frequency; the control management channels in a first preset number of consecutive IQ data frames constitute the underlying link information.
In particular, the IQ data frame comprises a payload unit comprising at least a control management channel, an IQ data segment and a reserved byte segment. The IQ data segment is composed of IQ data of a preset carrier frequency and is used for realizing transmission of the IQ data of the preset carrier frequency. The reserved field is composed of IQ data of the candidate carrier frequency for enabling transmission of the IQ data of the candidate carrier frequency. Here, the preset carrier frequency is a carrier frequency preset for transmission of the IQ data segment, the preset carrier frequency may be one or more carrier frequencies, the candidate carrier frequency is a carrier frequency other than the preset carrier frequency, and the candidate carrier frequency may be one or more carrier frequencies, which is not limited in this embodiment of the present invention. For example, the IQ data segment supports transmission of IQ data of 4G (first-generation mobile communication technology, Fifth generation mobile communication technology) NR (New Radio, New air interface) 100MHz carriers and 2G (Fourth-generation mobile communication technology) LTE (Long Term Evolution )2 ≧ 20MHz carriers. On this basis, the reserved byte segment can be used for carrying transmission of IQ data at the rest of carrier frequencies other than the 100MHz carrier and the 2 × 20MHz carrier.
In addition, in the payload unit, the control management channel is used for interacting the underlying link information. The bottom layer link information comprises at least one of K code synchronization byte, wireless frame number, equipment ID, manufacturer information, protocol version and the like. For any IQ data frame, if the control management channel in the IQ data frame needs to contain the entire content of the above-mentioned underlying link information, the control management channel needs to occupy a large number of bytes, resulting in that the available bytes of the IQ data segment and the reserved byte segment in the payload unit are compressed, affecting the transmission efficiency of the IQ data. Therefore, in the embodiment of the present invention, the underlying link information is distributed in the control management channel of the first preset number of consecutive IQ data frames. Furthermore, the number of bytes of the control management channel in each IQ data frame is limited, and the bottom link information is divided into a plurality of parts, which are respectively configured in the control management channels of a plurality of corresponding IQ data frames in a first preset number of consecutive IQ data frames, so that the control management channels of the first preset number of consecutive IQ data frames can constitute the bottom link information. Through the arrangement, available bytes are provided for the IQ data segment and the reserved byte segment in the IQ data frame to the maximum extent while the underlying link information is completely transmitted. For example, in 40 consecutive IQ data frames with the first predetermined number of 40, the control management channel of each IQ data frame is 1 byte, and the bottom link information is 40 bytes in total, then one byte is allocated to each IQ data frame based on the time division mechanism, so that the control management channels of the 40 consecutive IQ data frames can constitute complete bottom link information.
The IQ data frame provided by the embodiment of the invention has the advantages that the IQ data section and the available byte section are arranged in the effective load unit, so that the transmission of IQ data is more flexible, and the utilization rate of the effective load is higher. On the basis, the bottom link information is dispersed into the control management channels of the first preset number of continuous IQ data frames, so that repeated transmission is avoided on the basis of completely transmitting the bottom link information, the bandwidth is saved, more usable bytes are provided for IQ data segments and reserved word segments, the utilization rate of effective load is further improved, and the transmission requirement of a gigabit Ethernet port is met.
Based on the above embodiment, the first predetermined number of consecutive IQ data frames constitutes one superframe, and the second predetermined number of consecutive superframes constitutes one radio frame.
Specifically, one radio frame is composed of a second preset number of consecutive superframes, and one superframe is composed of a first preset number of consecutive IQ data frames, where the IQ data frames are basic frames. It should be noted that the first preset number and the second preset number are both preset, where the first preset number is a preset number of basic frames in a super frame, and the second preset number is a preset number of super frames in a wireless frame. For example, the first predetermined number is 40, the second predetermined number is 100, and the radio frame of 10ms is divided into 100 superframes, each superframe is composed of 40 IQ data frames, so that the time length of each IQ data frame is 2.5 μ s/100/40. The data transmission rate of the standard gigabit ethernet port is 10Gbps, and each IQ data frame consists of 3125 bytes.
Based on any of the above embodiments, the payload unit further comprises a message channel, and the message channel is used for transmitting the application layer message.
Here, the application layer message is used to complete functions of normal message interaction, version upgrade, log extraction, and the like of the master device and the slave device, and the payload unit presets a space to carry a message channel, for example, the message channel occupies 8 bytes.
According to any of the above embodiments, the IQ data frame further comprises at least one of a preamble, a frame start, a destination MAC address, a source MAC address, a length type, a frame check sequence and a frame gap.
Specifically, the preamble and the Frame start symbol are the start part of the IQ data Frame, and the destination MAC Address (Media Access Control Address) and the source MAC Address are the headers of the IQ data Frame, where the destination MAC Address represents the Address of the data receiving end, the source MAC Address represents the Address of the data transmitting end, the length type represents the length and the type of the IQ data Frame, the Frame Check Sequence (FCS) is used to Check whether the IQ data Frame is damaged, and the Frame Gap (IFG) is a segment of idle line status code, which is a time segment between two IQ data frames.
Based on any of the above embodiments, referring to the hardware structure shown in fig. 1 for transmitting baseband IQ data through a gigabit ethernet interface, the reference clock of the digital baseband processing module is set to 122.88MHz, the reference clock of the XFI interface inside the FPGA is set to 156.25MHz, and the reference clock of the PHY is set to 50MHz according to the CPRI specification. The wireless frame of 10ms is divided into 100 superframes, each superframe is composed of 40 IQ data frames, and the time length of each IQ data frame is obtained to be 10ms/100/40 ═ 2.5 mus.
Based on the above-mentioned hardware structure, fig. 3 is a schematic structural diagram of an IQ data frame according to another embodiment of the present invention, and as shown in fig. 3, the IQ data frame is composed of 3125 bytes. In the beginning of the IQ data frame, the preamble consists of 7 bytes and the frame start consists of 1 byte. The header portion, the destination MAC address and the source MAC address of the IQ data frame are each composed of 6 bytes. The length type of the IQ data frame consists of 2 bytes. The payload unit of the IQ data frame consists of 3087 bytes. In the end frame portion of the IQ data frame, the frame check sequence consists of 4 bytes and the frame gap consists of 12 bytes.
Fig. 4 is a schematic structural diagram of a payload unit according to an embodiment of the present invention, and as shown in fig. 4, the payload unit formed by 3087 bytes is divided into 4 parts, including a control management channel, a message channel, an IQ data segment, and a reserved byte segment. The control management channel is composed of 1 byte and is used for interacting bottom layer link information. The bottom layer link information has 40 bytes, one byte is allocated to each IQ data frame based on a time division mechanism, and the allocation is performed in a cycle of a superframe. The message channel is composed of 8 bytes.
The IQ data section is composed of 2880 bytes, and supports transmission of IQ data of 4G NR 100MHz carriers and 2G LTE 2 × 20MHz carriers. The sampling rate of each 100MHz carrier is 122.88MHz, the I and Q data of each sample point, i.e. IQ data, is composed of 15 bits, and then 4 × 2.5/1000000 × 122.88 × 15/8 ═ 2304 bytes in total in the period of one IQ data frame; the sampling rate of the 2 × 20MHz carrier is 61.44MHz, and the I and Q channels of data, i.e., IQ data, of each sampling point are composed of 15 bits, so that 2 × 20MHz carriers have 2 × 2.5/1000000 × 61.44 × 15/8 bytes in total in the period of one IQ data frame. This results in a total number of bytes of 2304+576 of 2880 bytes for the IQ data segment. The reserved byte section has 198 bytes, and can be used for carrying transmission of IQ data at the rest carrier frequencies.
The IQ data frame provided by the embodiment of the invention has the advantages that the IQ data section and the available byte section are arranged in the effective load unit, so that the transmission of IQ data is more flexible, and the utilization rate of the effective load is higher. On the basis, the information of the bottom link is dispersed into the control management channel of each IQ data frame in the superframe, so that repeated transmission is avoided on the basis of completely transmitting the information of the bottom link, the bandwidth is saved, more usable bytes are provided for IQ data segments and reserved byte segments, the utilization rate of the effective load is further improved, and the transmission requirement of the gigabit Ethernet port is met. In addition, in the hardware structure for transmitting baseband IQ data by the gigabit Ethernet port depending on the IQ data frame, the reference clock is set according to CPRI specifications, so that the requirements of devices in the hardware structure can be met, and the reliability and the stability of equipment are effectively improved.
Based on any of the above embodiments, fig. 5 is a schematic diagram illustrating allocation of bottom link information according to an embodiment of the present invention, as shown in fig. 5, a super frame includes 40 IQ data frames, each square in the diagram corresponds to a control management channel of one IQ data frame, and each control management channel is composed of 1 byte. Correspondingly, the bottom link information is divided into 40 bytes, wherein the portions of the bottom link information included in the control management channels of the IQ data frames with sequence numbers 00, 01, and 02 are respectively the K code synchronization byte, the version, and the manufacturer information, and the K code synchronization byte in fig. 5 is K28.5. The portions of the underlay link information contained in the control management channels of the IQ data frames with sequence numbers 10, 11 and 12 are Hyper Frame Number (HFN), L1-reset-Los and device ID, respectively. The parts of the bottom link information contained in the control management channels of the IQ data frames with sequence numbers 20 and 21 are BFN-low and alarm information, respectively, the parts of the bottom link information contained in the control management channels of the IQ data frames with sequence numbers 30 and 31 are BFN-high and alarm information, respectively, and the control management channels of the IQ data frames with the remaining sequence numbers are reserved items, which can be added and set as required, and have strong flexibility.
Based on any of the above embodiments, fig. 6 is a schematic flow diagram of a transmission method of an IQ data frame according to an embodiment of the present invention, and as shown in fig. 6, an execution main body of the transmission method is a sending end, where the sending end may be a sending module of an XFI interface in an FPGA in a hardware structure for transmitting baseband IQ data through a gigabit ethernet interface shown in fig. 1. The transmission method comprises the following steps:
610, constructing a current IQ data frame based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information; the current IQ data frame is the IQ data frame provided in any of the embodiments above.
Specifically, the preset carrier frequency is a carrier frequency preset for transmission of the IQ data segment, the preset carrier frequency may be one or more carrier frequencies, the candidate carrier frequency is another carrier frequency other than the preset carrier frequency, and the candidate carrier frequency may be one or more carrier frequencies, which is not limited in this embodiment of the present invention. IQ data of a preset carrier frequency is used for forming an IQ data segment, and IQ data of a candidate carrier frequency is used for forming a reserved byte segment.
The bottom layer link information comprises at least one of K code synchronization byte, wireless frame number, equipment ID, manufacturer information, protocol version and the like. The bottom layer link information is dispersed in the control management channels of a first preset number of continuous IQ data frames. Further, the number of bytes of the control management channel in each IQ data frame is limited, the bottom link information is divided into a plurality of parts, and the parts are respectively configured in the control management channels of a plurality of corresponding IQ data frames in the first preset number of consecutive IQ data frames, so that the control management channels of all IQ data frames in the first preset number of consecutive IQ data frames can constitute the bottom link information. Here, a portion of the underlying link information corresponding to the current IQ data frame is used to constitute a control management channel of the current IQ data frame.
Referring to fig. 2, the IQ data frame includes a payload unit including an IQ data segment, a reserved field segment, and a control management channel. Therefore, based on the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency, and the portion corresponding to the current IQ data frame in the underlying link information, a payload unit can be constructed, thereby constructing the current IQ data frame.
And 620, sending the current IQ data frame so that the receiving end receives the current IQ data frame, and acquiring IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information based on the current IQ data frame.
Specifically, the transmitting end transmits the constructed current IQ data frame to the receiving end. Here, the receiving end may be a receiving module of an XFI interface in an FPGA in a hardware structure in which the gigabit ethernet interface shown in fig. 1 transmits baseband IQ data. After receiving the current IQ data frame sent by the sending end, the receiving end performs deframing, acquires a payload unit from the current IQ data frame, and further acquires an IQ data segment, a reserved byte segment and a control management channel in the payload unit. Here, the IQ data segment is composed of IQ data of a preset carrier frequency, the reserved field is composed of IQ data of a candidate carrier frequency, and the control management channel is composed of a portion corresponding to the current IQ data frame in the underlying link information.
In addition, after receiving a first preset number of consecutive IQ data frames, the receiving end respectively obtains a control management channel of each IQ data frame, and thus, complete bottom layer link information can be obtained.
The transmission method provided by the embodiment of the invention transmits IQ data based on IQ data frames, and the transmission of the IQ data is more flexible and the utilization rate of the effective load is higher by setting the IQ data section and the available byte section in the effective load unit. On the basis, the bottom link information is dispersed into the control management channel of each IQ data frame in the first continuous IQ data frames with preset quantity, so that repeated transmission is avoided on the basis of completely transmitting the bottom link information, the bandwidth is saved, more available bytes are provided for IQ data segments and reserved byte segments, the utilization rate of effective load is further improved, and the transmission requirement of a gigabit Ethernet port is met.
Based on any of the above embodiments, before step 610, the transmission method further includes: the IQ data is subjected to 15/8 bit conversion.
Here, the IQ data includes IQ data of a preset carrier frequency and/or IQ data of a candidate carrier frequency. Before constructing an IQ data frame based on the IQ data, 15/8-bit conversion needs to be performed on IQ data with a bit width of 15 bits to obtain IQ data with a bit width of 8 bits, so as to facilitate subsequent framing with a control management channel and a message channel with a bit width of 8 bits.
Correspondingly, before steps 610 and 620, that is, after the current IQ data frame is constructed and before the current IQ data frame is sent, the transmission method further includes: and carrying out 8/64-bit conversion and 64/66-bit encoding on the current IQ data frame in sequence to obtain the current IQ data frame with the bit width of 66 bits.
Framing is carried out based on the IQ data with the bit width of 8 bits and the control management channel and the message channel with the same bit width of 8 bits, and the bit width of the constructed current IQ data frame is also 8 bits. After the current IQ data frame is obtained, 8/64-bit conversion is performed on the current IQ data frame first, and the bit width of the current IQ data frame is converted from 8 bits to 64 bits. Subsequently, 64/66-bit encoding is performed on the current IQ data frame, and the bit width of the current IQ data frame is converted from 64 bits to 66 bits, that is, the bit width of the current IQ data frame finally transmitted by the transmitting end is 66 bits.
Based on any of the above embodiments, step 610 specifically includes:
611, constructing an effective load unit based on the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency, the part corresponding to the current IQ data frame in the bottom link information and the message channel.
In particular, referring to fig. 4, a message channel is used to transport application layer messages. The application layer message is used for completing functions of normal message interaction, version upgrading, log extraction and the like of the master device and the slave device, and the payload unit presets a space bearing message channel, for example, the message channel occupies 8 bytes. Here, the payload unit is composed of a control management channel, a message channel, an IQ data segment, and a reserved field segment. The control management channel is composed of a part corresponding to a current IQ data frame in bottom layer link information, the IQ data section is composed of IQ data of a preset carrier frequency, and the reserved byte section is composed of IQ data of a candidate carrier frequency.
612, constructing a current IQ data frame based on the preamble, the frame start, the destination MAC address, the source MAC address, the length type, the payload unit, the frame check sequence and the frame gap.
Specifically, referring to fig. 3, the preamble and the frame start symbol are the start portion of the IQ data frame, and the destination MAC address and the source MAC address are the headers of the IQ data frame, where the destination MAC address represents the address of the data receiving end, the source MAC address represents the address of the data transmitting end, the length type represents the length and the type of the IQ data frame, the frame check sequence is used to check whether the IQ data frame is damaged, and the frame gap is an idle line status code, which is a time period between two IQ data frames.
Based on any of the above embodiments, fig. 7 is a schematic flowchart of a transmission method of an IQ data frame according to another embodiment of the present invention, as shown in fig. 7, the transmission method includes:
first, 15/8-bit conversion is performed on IQ data having a bit width of 15 bits to obtain IQ data having a bit width of 8 bits. Here, the IQ data includes IQ data of a preset carrier frequency and/or IQ data of a candidate carrier frequency. And caching the converted IQ data. Similarly, the control management channel and the message channel with the bit width of 8 bits are buffered, that is, the control management information buffer and the message buffer shown in fig. 7. Here, the control management channel is constituted by a portion corresponding to the current IQ data frame in the underlying link information.
And performing Ethernet framing based on the IQ data with the bit width of 8 bits, the control management channel and the message channel. Furthermore, in the IQ data, IQ data of a preset carrier frequency forms an IQ data segment, IQ data of a candidate carrier frequency forms a reserved field, a payload unit is constructed based on a control management channel, a message channel, the IQ data segment and the reserved field, and a current IQ data frame is constructed based on a preamble, a frame start symbol, a destination MAC address, a source MAC address, a length type, the payload unit, a frame check sequence and a frame gap, thereby completing ethernet framing.
Subsequently, 8/64-bit conversion and 64/66-bit encoding are sequentially performed on the current IQ data frame, so as to obtain the current IQ data frame with a bit width of 66 bits and send the current IQ data frame to the receiving end.
Based on any of the above embodiments, fig. 8 is a schematic flow chart of a receiving method of an IQ data frame according to an embodiment of the present invention, and as shown in fig. 8, an executing main body of the receiving method is a receiving end, where the receiving end may be a receiving module of an XFI interface in an FPGA in a hardware structure for transmitting baseband IQ data through a gigabit ethernet interface shown in fig. 1. The receiving method comprises the following steps:
810, receiving a current IQ data frame sent by a sending end; the current IQ data frame is constructed by the transmitting end based on the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency, and a part corresponding to the current IQ data frame in the bottom link information, and the current IQ data frame is the IQ data frame provided by any one of the embodiments.
Specifically, the preset carrier frequency is a carrier frequency preset for transmission of the IQ data segment, the preset carrier frequency may be one or more carrier frequencies, the candidate carrier frequency is another carrier frequency other than the preset carrier frequency, and the candidate carrier frequency may be one or more carrier frequencies, which is not limited in this embodiment of the present invention. IQ data of a preset carrier frequency is used for forming an IQ data segment, and IQ data of a candidate carrier frequency is used for forming a reserved byte segment.
The bottom layer link information comprises at least one of K code synchronization byte, wireless frame number, equipment ID, manufacturer information, protocol version and the like. The bottom layer link information is dispersed in the control management channels of a first preset number of continuous IQ data frames. Furthermore, the number of bytes of the control management channel in each IQ data frame is limited, the bottom link information is divided into a plurality of parts, and the parts are respectively configured in the control management channels of the corresponding IQ data frames in the first preset number of consecutive IQ data frames, so that the control management channels of the first preset number of consecutive IQ data frames can constitute the bottom link information. Here, a portion of the underlying link information corresponding to the current IQ data frame is used to constitute a control management channel of the current IQ data frame.
Referring to fig. 2, the IQ data frame includes a payload unit including an IQ data segment, a reserved field segment, and a control management channel. Therefore, the transmitting end constructs an effective load unit based on the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency and the part corresponding to the current IQ data frame in the bottom link information, thereby constructing the current IQ data frame and transmitting the current IQ data frame to the receiving end.
And 820, acquiring IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information based on the current IQ data frame.
Specifically, after receiving the current IQ data frame sent by the sending end, the receiving end performs deframing, acquires a payload unit from the current IQ data frame, and further acquires an IQ data segment, a reserved byte segment, and a control management channel in the payload unit. Here, the IQ data segment is composed of IQ data of a preset carrier frequency, the reserved field is composed of IQ data of a candidate carrier frequency, and the control management channel is composed of a portion corresponding to the current IQ data frame in the underlying link information.
In addition, after receiving a first preset number of consecutive IQ data frames, the receiving end respectively obtains a control management channel of each IQ data frame, and thus, complete bottom layer link information can be obtained.
The receiving method provided by the embodiment of the invention transmits IQ data based on IQ data frames, and enables the transmission of the IQ data to be more flexible and the utilization rate of the effective load to be higher by setting IQ data segments and available byte segments in the effective load units. On the basis, the bottom link information is dispersed into the control management channels of the first preset number of continuous IQ data frames, so that repeated transmission is avoided on the basis of completely transmitting the bottom link information, the bandwidth is saved, more usable bytes are provided for IQ data segments and reserved word segments, the utilization rate of effective load is further improved, and the transmission requirement of a gigabit Ethernet port is met.
Based on any of the above embodiments, between step 810 and step 820, the receiving method further includes: the current IQ data frame is sequentially subjected to 66/64-bit decoding and 64/8-bit conversion to obtain the current IQ data frame with 8-bit width.
Specifically, before transmitting the current IQ data frame, the transmitting end performs 8/64-bit conversion and 64/66-bit encoding on the current IQ data frame in sequence, so as to obtain and transmit the current IQ data frame with a bit width of 66 bits. Thus, the bit width of the current IQ data frame received by the receiving end is 66 bits. After receiving the current IQ data frame, the receiving end first performs 66/64-bit decoding on the current IQ data frame to obtain a current IQ data frame with a bit width of 64 bits, and then performs 64/8-bit conversion to obtain a current IQ data frame with a bit width of 8 bits. The current IQ data frame with 8-bit width is deframed, so that IQ data with 8-bit width, a message channel and a control management channel can be obtained.
After step 820, the receiving method further comprises: and carrying out 8/15 bit conversion on the IQ data to obtain the IQ data with the bit width of 15 bits.
Here, the IQ data includes IQ data of a preset carrier frequency and/or IQ data of a candidate carrier frequency. Before framing, the transmitting end performs 15/8-bit conversion on the IQ data with a bit width of 15 bits to obtain IQ data with a bit width of 8 bits, so as to facilitate subsequent framing with a control management channel and a message channel with a bit width of 8 bits. Correspondingly, the bit width of the IQ data obtained by the de-framing at the receiving end is 8 bits, so that 8/15 bits of the IQ data line are converted, thereby restoring the IQ data with the bit width of 15 bits.
Based on any of the above embodiments, step 820 specifically includes:
821, frame synchronization is performed based on the preamble and the frame start in the current IQ data frame.
Here, the preamble and the frame start are the start parts of the IQ data frame, and frame synchronization of the current IQ data frame can be achieved by performing synchronization search on the preamble and the frame start in the current IQ data frame.
822, extracting the payload unit from the frame-synchronized current IQ data frame.
823, based on the payload unit, acquiring IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency, a part corresponding to the current IQ data frame in the underlying link information, and a message channel.
Here, the IQ data segment, the reserved field segment, the control management channel, and the message channel are acquired based on the payload unit. The IQ data section is composed of IQ data of a preset carrier frequency, the reserved byte section is composed of IQ data of a candidate carrier frequency, and the control management channel is composed of a part corresponding to a current IQ data frame in bottom link information.
Based on any of the above embodiments, fig. 9 is a schematic flow chart of a receiving method for an IQ data frame according to another embodiment of the present invention, as shown in fig. 9, the receiving method includes:
first, a current IQ data frame with a bit width of 66 bits sent by a sending end is received, and 66/64-bit decoding and 64/8-bit conversion are performed on the current IQ data frame to obtain a current IQ data frame with a bit width of 8 bits.
And secondly, performing synchronous search on the lead code and the frame start symbol in the current IQ data frame to realize the frame synchronization of the current IQ data frame.
And then, the current IQ data frame after frame synchronization is subjected to Ethernet unframing. Further, a payload unit is obtained from the current IQ data frame, and then an IQ data segment, a reserved field segment, a control management channel, and a message channel are obtained from the payload unit. Here, the IQ data segment is composed of IQ data of a preset carrier frequency having a bit width of 8 bits, and the reserved field segment is composed of IQ data of a candidate carrier frequency having a bit width of 8 bits. And caching the IQ data. Similarly, the control management channel and the message channel with the bit width of 8 bits are buffered, that is, the control management information buffer and the message buffer shown in fig. 9.
And 8/15-bit conversion is carried out on the IQ data with the bit width of 8 bits, so that the IQ data with the bit width of 15 bits is restored.
Based on any of the above embodiments, fig. 10 is a schematic structural diagram of a transmission apparatus for IQ data frames according to an embodiment of the present invention, as shown in fig. 10, the transmission apparatus includes a framing module 1010 and a sending module 1020;
the framing module 1010 is configured to construct a current IQ data frame based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency, and a portion corresponding to the current IQ data frame in bottom link information; the current IQ data frame is an IQ data frame provided by any of the above embodiments;
the transmitting module 1020 is configured to transmit the current IQ data frame, so that the receiving end receives the current IQ data frame, and acquires IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency, and a portion corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
The transmission device provided by the embodiment of the invention transmits IQ data based on IQ data frames, and the transmission of the IQ data is more flexible and the utilization rate of the effective load is higher by setting the IQ data section and the available byte section in the effective load unit. On the basis, the bottom link information is dispersed into the control management channels of the first preset number of continuous IQ data frames, so that repeated transmission is avoided on the basis of completely transmitting the bottom link information, the bandwidth is saved, more usable bytes are provided for IQ data segments and reserved word segments, the utilization rate of effective load is further improved, and the transmission requirement of a gigabit Ethernet port is met.
Based on any of the above embodiments, the transmission device further comprises a first conversion module and a second conversion module;
wherein the first conversion module is configured to perform 15/8-bit conversion on the IQ data before constructing the current IQ data frame;
the second conversion module is configured to perform 8/64-bit conversion and 64/66-bit encoding on the current IQ data frame in sequence before sending the current IQ data frame, so as to obtain the current IQ data frame with a bit width of 66 bits.
Based on any of the above embodiments, the framing module 1010 is specifically configured to: constructing an effective load unit based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency, a part corresponding to a current IQ data frame in bottom link information and a message channel; constructing a current IQ data frame based on the preamble, the frame start, the destination MAC address, the source MAC address, the length type, the payload unit, the frame check sequence and the frame gap.
Based on any of the above embodiments, fig. 11 is a schematic structural diagram of a receiving apparatus for IQ data frames according to an embodiment of the present invention, as shown in fig. 11, the receiving apparatus includes a receiving module 1110 and a de-framing module 1120;
the receiving module 1110 is configured to receive a current IQ data frame sent by a sending end; the current IQ data frame is constructed by the transmitting end based on the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency and the part corresponding to the current IQ data frame in the bottom link information, and the current IQ data frame is the IQ data frame provided by any one of the embodiments;
the deframing module 1120 is configured to obtain IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency, and a portion corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
The receiving device provided by the embodiment of the invention transmits IQ data based on IQ data frames, and the IQ data is transmitted more flexibly and the utilization rate of the effective load is higher by setting the IQ data section and the available byte section in the effective load unit. On the basis, the bottom link information is dispersed into the control management channels of the first preset number of continuous IQ data frames, so that repeated transmission is avoided on the basis of completely transmitting the bottom link information, the bandwidth is saved, more usable bytes are provided for IQ data segments and reserved word segments, the utilization rate of effective load is further improved, and the transmission requirement of a gigabit Ethernet port is met.
Based on any of the above embodiments, the receiving apparatus further includes a third converting module and a fourth converting module;
the third conversion module is used for sequentially carrying out 66/64-bit decoding and 64/8-bit conversion on the current IQ data frame before IQ data of a preset carrier frequency are acquired based on the current IQ data frame to obtain the current IQ data frame with the bit width of 8 bits;
the fourth conversion module is configured to perform 8/15-bit conversion on the IQ data after acquiring the IQ data of the preset carrier frequency and the IQ data of the candidate carrier frequency based on the current IQ data frame, so as to obtain IQ data with a bit width of 15 bits.
Based on any of the above embodiments, the deframing module 1120 is specifically configured to: performing frame synchronization based on a preamble and a frame start symbol in a current IQ data frame; extracting a payload unit from a current IQ data frame after frame synchronization; based on the effective load unit, IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency, a part corresponding to a current IQ data frame in bottom link information and a message channel are obtained.
Fig. 12 is a schematic entity structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 12, the electronic device may include: a processor (processor)1201, a communication Interface (Communications Interface)1202, a memory (memory)1203 and a communication bus 1204, wherein the processor 1201, the communication Interface 1202 and the memory 1203 communicate with each other through the communication bus 1204. The processor 1201 may call a computer program stored on the memory 1203 and operable on the processor 1201 to execute the transmission method of the IQ data frame provided by the above embodiments, for example, the method includes: constructing a current IQ data frame based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information; the current IQ data frame is an IQ data frame provided in any of the embodiments above; and sending the current IQ data frame so that a receiving end receives the current IQ data frame, and acquiring IQ data of the preset carrier frequency, IQ data of the candidate carrier frequency and a part corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
The processor 1201 may also call a computer program stored on the memory 1203 and executable on the processor 1201 to perform the receiving method of the IQ data frame provided by the above embodiments, for example, including: receiving a current IQ data frame sent by a sending end; the current IQ data frame is constructed by the transmitting end based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information, and the current IQ data frame is the IQ data frame provided by any one of the embodiments; and acquiring IQ data of the preset carrier frequency, IQ data of the candidate carrier frequency and a part corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
In addition, the logic instructions in the memory 1203 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
An embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method of the IQ data frame provided in the foregoing embodiments when executed by a processor, for example, the method includes: constructing a current IQ data frame based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information; the current IQ data frame is an IQ data frame provided in any of the embodiments above; and sending the current IQ data frame so that a receiving end receives the current IQ data frame, and acquiring IQ data of the preset carrier frequency, IQ data of the candidate carrier frequency and a part corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
An embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the receiving method of the IQ data frame provided in the foregoing embodiments when executed by a processor, for example, the method includes: receiving a current IQ data frame sent by a sending end; the current IQ data frame is constructed by the transmitting end based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information, and the current IQ data frame is the IQ data frame provided by any one of the embodiments; and acquiring IQ data of the preset carrier frequency, IQ data of the candidate carrier frequency and a part corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of constructing an IQ data frame, comprising determining a payload unit comprising a control management channel, an IQ data segment, and a reserved field segment;
the IQ data segment is composed of IQ data of a preset carrier frequency, and the reserved byte section is composed of IQ data of a candidate carrier frequency;
the control management channels in a first preset number of consecutive IQ data frames constitute bottom link information.
2. The IQ data frame construction method according to claim 1, wherein the first preset number of consecutive IQ data frames constitutes a superframe, and the second preset number of consecutive superframes constitutes a radio frame.
3. The method for constructing the IQ data frame according to claim 1, wherein the payload unit further comprises a message channel for transmitting application layer messages.
4. The IQ data frame construction method according to claim 1, further comprising at least one of a preamble, a frame start symbol, a destination MAC address, a source MAC address, a length type, a frame check sequence and a frame gap.
5. A method for transmitting IQ data frames, comprising:
constructing a current IQ data frame based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information; the current IQ data frame is formed by the method of forming the IQ data frame according to any one of claims 1 to 4;
and sending the current IQ data frame so that a receiving end receives the current IQ data frame, and acquiring IQ data of the preset carrier frequency, IQ data of the candidate carrier frequency and a part corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
6. The transmission method according to claim 5, wherein the current IQ data frame is constructed based on the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency, and a portion corresponding to the current IQ data frame in the underlying link information, and before further comprising:
15/8 bit conversion is performed on the IQ data; the IQ data comprises IQ data of the preset carrier frequency and/or IQ data of the candidate carrier frequency;
the sending the current IQ data frame further includes:
and sequentially carrying out 8/64-bit conversion and 64/66-bit encoding on the current IQ data frame to obtain the current IQ data frame with the bit width of 66 bits.
7. The transmission method according to claim 5, wherein the constructing the current IQ data frame based on the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency, and the portion corresponding to the current IQ data frame in the underlying link information specifically comprises:
constructing an effective load unit based on the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency, the part corresponding to the current IQ data frame in the bottom link information and a message channel;
constructing the current IQ data frame based on a preamble, a frame start symbol, a destination MAC address, a source MAC address, a length type, the payload unit, a frame check sequence and a frame gap.
8. A method for receiving IQ data frames, comprising:
receiving a current IQ data frame sent by a sending end; the current IQ data frame is constructed by the transmitting end based on IQ data of a preset carrier frequency, IQ data of a candidate carrier frequency and a part corresponding to the current IQ data frame in bottom link information, and the current IQ data frame is constructed by the method for constructing the IQ data frame according to any one of claims 1 to 4;
and acquiring IQ data of the preset carrier frequency, IQ data of the candidate carrier frequency and a part corresponding to the current IQ data frame in the bottom link information based on the current IQ data frame.
9. The receiving method according to claim 8, wherein the acquiring the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency, and the portion of the underlying link information corresponding to the current IQ data frame based on the current IQ data frame further comprises:
carrying out 66/64-bit decoding and 64/8-bit conversion on the current IQ data frame in sequence to obtain the current IQ data frame with 8-bit width;
the acquiring, based on the current IQ data frame, the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency, and a portion corresponding to the current IQ data frame in the bottom link information, then further includes:
carrying out 8/15 bit conversion on IQ data to obtain the IQ data with the bit width of 15 bits; the IQ data comprises IQ data of the preset carrier frequency and/or IQ data of the candidate carrier frequency.
10. The receiving method according to claim 8, wherein the acquiring the IQ data of the preset carrier frequency, the IQ data of the candidate carrier frequency, and the part of the underlying link information corresponding to the current IQ data frame based on the current IQ data frame specifically includes:
performing frame synchronization based on a preamble and a frame start in the current IQ data frame;
extracting a payload unit from the current IQ data frame after frame synchronization;
and acquiring IQ data of the preset carrier frequency, IQ data of the candidate carrier frequency, a part corresponding to the current IQ data frame in the bottom link information and a message channel based on the payload unit.
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