CN112073164B - Method and device for generating 5G Time Division Duplex (TDD) control signal and base station - Google Patents

Method and device for generating 5G Time Division Duplex (TDD) control signal and base station Download PDF

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CN112073164B
CN112073164B CN201910501464.3A CN201910501464A CN112073164B CN 112073164 B CN112073164 B CN 112073164B CN 201910501464 A CN201910501464 A CN 201910501464A CN 112073164 B CN112073164 B CN 112073164B
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tdd
frame format
format information
indication information
control signal
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CN112073164A (en
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王芳莉
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/0008—Wavelet-division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

The invention discloses a method and a device for generating a 5G time division duplex TDD control signal, which receive TDD frame format information issued by a BBU (base band unit) in an Ethernet real-time message mode, or directly receive DL-UL (downlink-uplink) indication information transmitted by the BBU through a pseudo IQ (in-phase quadrature) of an IF (interface) 1 port, and generate the TDD control signal according to the information. Therefore, the problem that the existing 5G TDD control signal cannot be generated is effectively solved.

Description

Method and device for generating 5G Time Division Duplex (TDD) control signal and base station
Technical Field
The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a base station for generating a 5G Time Division Duplexing (TDD) control signal.
Background
In LTE TDD, a frame is 10ms long and is divided into 10 subframes of 1ms in length. The uplink and downlink data are transmitted on different subframes within the same frame. Different uplink and downlink time ratios are supported in LTE TDD, and the uplink and downlink time ratios can be adjusted according to different service types so as to meet asymmetric service requirements of uplink and downlink. In the same frame, the configuration of different uplink and downlink subframes only has 7 modes, and DL, UL and special subframes are defined by taking a subframe as a unit. The length of DwPTS, GP and UpPTS of the special subframe is defined as a unit according to the length of symbols in a 5G multi-subcarrier interval NR frame structure.
However, since 5G supports more application scenarios, where Ultra-high Reliable Low Latency Communications (URLLC) is a key service of future 5G, a frame structure shorter than an LTE timeslot is required. The number of the current definition is 55 to 256. TDD is configured to support a self-contained frame structure (slot format) in a timeslot, and DL, UL, and GP are defined in units of symbols. Different slots may have different self-contained frame structures, while 5G requires support for dynamic TTIs, with slot lengths and symbol lengths varying dynamically. Therefore, LTE TDD cannot be used to locally store fixed frame structure information and perform a semi-static handover scheme according to cell radio configuration. Therefore, how to generate the 5G TDD control signal becomes a problem to be solved urgently.
Disclosure of Invention
The invention provides a method, a device and a base station for generating a 5G TDD control signal, which are used for solving the problem that the 5G TDD control signal cannot be generated in the prior art.
To solve the above technical problem, in one aspect, the present invention provides a method for generating a 5G TDD control signal, including: receiving TDD frame format information issued by a baseband processing unit BBU through an Ethernet real-time message, and generating a TDD control signal based on the TDD frame format information; the TDD frame format information comprises symbol length information and uplink and downlink DL-UL indication information in a 5G multi-subcarrier interval NR frame structure;
or,
receiving DL-UL indication information transmitted by a pseudo IQ field formed by an I path and a Q path orthogonal to the BBU through frequency domain data segmentation IF1 port, and generating a TDD control signal based on the DL-UL indication information.
Preferably, the receiving of the TDD frame format information issued by the BBU through the ethernet real-time message includes: and receiving TDD frame format information which is issued by an Ethernet real-time message in advance by 0.125ms-20ms of BBU or integral multiple time of a preset uplink and downlink switching period.
Preferably, after receiving the TDD frame format information sent by the BBU through the ethernet real-time message, before generating the TDD control signal based on the TDD frame format information, the method further includes: and storing the TDD frame format information into a preset table entry.
Preferably, the entry parameters of the preset entry include one or more of the following: the depth of the table entry, the cycle period of the uplink/downlink DL/UL configuration, the number of symbols in the switching period time and the preset switching period;
storing the TDD frame format information into a preset entry, including:
storing DL-UL indication information corresponding to each symbol into different addresses of a preset table entry according to the table entry parameter and the symbol length information in the TDD frame format information, wherein each row of the preset table entry stores DL-UL indication information of one symbol;
and switching and storing DL-UL indication information in the TDD frame format information into a first table entry and a second table entry according to the preset switching period, wherein the preset table entry comprises the first table entry and the second table entry.
Preferably, the predetermined switching period is 10ms or an integral multiple time of a preset uplink and downlink switching period.
Preferably, generating the TDD control signal based on the TDD frame format information includes:
in a first preset switching period, generating a TDD control signal according to DL-UL indication information stored in the first table entry; storing the received TDD frame format information issued by the BBU to the second table entry according to the table entry parameter and the TDD frame format information, and storing the symbol length and DL-UL indication information corresponding to each symbol to the second table entry;
in a second preset switching period, generating a TDD control signal based on DL-UL indication information stored in the second table entry, and storing received TDD frame format information issued by the BBU to the first table entry according to the table entry parameter and the TDD frame format information, wherein the symbol length and the DL-UL indication information corresponding to each symbol are stored in the first table entry;
and after the preset switching period is reached, circularly executing the steps.
Preferably, receiving DL-UL indication information from the BBU through pseudo IQ transmission of the IF1 port includes: and receiving the DL-UL indication information of the symbol sent by the BBU through the pseudo-IQ associated path of each symbol, or sending the DL-UL indication information of all symbols in each time slot through the pseudo-IQ of the first symbol of each time slot.
Preferably, after generating the TDD control signal, the method further includes: and aligning the DL-UL indication information and the data to the TDD control signal.
In another aspect, the present invention provides a method for generating a 5G TDD control signal, the method comprising: the first generating unit is used for receiving TDD frame format information sent by the baseband processing unit BBU through an Ethernet real-time message and generating a TDD control signal based on the TDD frame format information; the TDD frame format information comprises symbol length information and uplink and downlink DL-UL indication information in a 5G multi-subcarrier interval NR frame structure;
or,
and the second generation unit is used for receiving DL-UL indication information transmitted by a pseudo IQ field consisting of 15-bit homodromous I and 15-bit orthogonal Q of the BBU through frequency domain data segmentation IF1 port, and generating a TDD control signal based on the DL-UL indication information.
Preferably, the first generating unit is further configured to receive TDD frame format information sent by an ethernet real-time message in advance of 0.125ms to 20ms or an integral multiple of a preset uplink and downlink switching period of the BBU.
Preferably, the first generating unit is further configured to, after receiving TDD frame format information sent by the BBU through an ethernet real-time message, store the TDD frame format information into a preset entry before generating a TDD control signal based on the TDD frame format information.
Preferably, the entry parameter of the preset entry includes one or more of the following: the depth of the table entry, the cycle period of DL/UL configuration, the number of symbols in the time of the switching period and the preset switching period;
the first generating unit is further configured to store, according to the entry parameter and the TDD frame format information, a symbol length and DL-UL indication information corresponding to each symbol into different addresses of a preset entry, where each row of the preset entry stores DL-UL indication information of one symbol, and switch and store the DL-UL indication information into a first entry and a second entry according to the predetermined switching period, where the preset entry includes the first entry and the second entry.
Preferably, the first generating unit is further configured to generate a TDD control signal according to DL-UL indication information stored in the first table entry in a first predetermined switching period; storing the received TDD frame format information issued by the BBU to the second table entry according to the table entry parameter and the TDD frame format information, and storing the symbol length and DL-UL indication information corresponding to each symbol to the second table entry; in a second preset switching period, generating a TDD control signal based on DL-UL indication information stored in the second table entry, and storing received TDD frame format information issued by the BBU to the first table entry according to the table entry parameter and the TDD frame format information, wherein the symbol length and the DL-UL indication information corresponding to each symbol are stored in the first table entry; and after the preset switching period is reached, circularly executing the steps.
Preferably, the second generating unit is further configured to receive the DL-UL indication information of the symbol sent by the BBU through the pseudo IQ associated channel of each symbol, or send the DL-UL indication information of all symbols in each slot through the pseudo IQ of the first symbol of each slot.
Preferably, the apparatus further comprises: and the alignment unit is used for aligning the DL-UL indication information and the data of the TDD control signal after the TDD control signal is generated.
In yet another aspect, the present invention also provides a computer-readable storage medium storing a computer program for signal mapping, which when executed by at least one processor, performs the steps of any one of the above-mentioned methods.
In yet another aspect, the present invention provides a base station, where the base station includes a processor and a storage device, where the storage device stores a plurality of instructions to implement a method for generating a 5G TDD control signal, and the processor executes the plurality of instructions to implement the steps of any one of the methods.
The invention receives TDD frame format information issued by a baseband processing unit (BBU) in an Ethernet real-time message mode, or directly receives DL-UL indication information transmitted by a BBU through a pseudo IQ of an IF1 port, and generates a TDD control signal according to the information. Therefore, the problem that the existing 5G TDD control signal cannot be generated is effectively solved.
Drawings
Fig. 1 is a flowchart of a method for generating a 5G TDD control signal according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating switching between a first table entry and a second table entry according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a 5G TDD control signal generating apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another 5G TDD control signal generating apparatus according to an embodiment of the present invention.
Detailed Description
In order to solve the problem of the prior art that a 5G TDD control signal cannot be generated in a semi-static or dynamic manner, the present invention provides a method for generating a 5G TDD control signal, which is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
A first embodiment of the present invention provides a method for generating a 5G TDD control signal, which is applied to a Remote Radio Unit (RRU), and a flow of the method is shown in fig. 1, and includes steps S101 to S102:
s101, receiving TDD frame format information sent by a BBU through an Ethernet real-time message, and generating a TDD control signal based on the TDD frame format information, or receiving DL-UL indication information transmitted by a pseudo IQ field formed by an I path and a Q path orthogonal to an IF1 port of the BBU through frequency domain data segmentation;
the TDD frame format information includes symbol length information and DL-UL indication information;
of course, in specific implementation, the embodiment of the present invention may also set a DTX identifier, i.e., a power saving identifier, in the TDD frame format information.
For example, if the symbol length of the TDD frame format information is set to 14, the corresponding DL-UL indication information and whether or not to save power flag are set for each symbol. And then, generating a TDD control signal according to the DL-UL indication information corresponding to each symbol.
It should be noted that the symbol length of the TDD frame format information according to the embodiment of the present invention may be set according to actual needs, which is not specifically limited in the embodiment of the present invention.
S102, generating a TDD control signal based on the TDD frame format information or the DL-UL indication information.
The method provided by the embodiment of the invention receives the TDD frame format information issued by the BBU in an Ethernet real-time message mode, or directly receives the DL-UL indication information transmitted by the BBU through the pseudo IQ of the IF1 port, and generates the TDD control signal according to the TDD frame format information or the DL-UL indication information, thereby effectively solving the problem that the 5G TDD control signal cannot be generated in the prior art.
Generally, in a 5G large-flow low-delay application scenario, in order to reduce the optical fiber transmission pressure between the BBU and the RRU, the embodiment of the present invention transmits the frequency domain data of the IF1 interface in the form of IF1 interface segmentation or ethernet packet.
Because the BBU sends the message, the RRU stores and extracts and generates the TDD control signal all need time, the BBU of the embodiment of the invention needs to send the TDD frame format information in advance in a preset time.
In specific implementation, the embodiment of the invention issues the TDD frame format information by 0.125ms to 20ms in advance of the BBU or by an integral multiple of a preset uplink and downlink switching period, and the RRU receives the TDD frame format information issued by the BBU by 10ms in advance or by an integral multiple of a preset uplink and downlink switching period through an ethernet real-time message.
It should be noted that the advance period may be set according to actual needs, and the present invention is not limited to this.
And after receiving the TDD frame format information transmitted by the BBU, the RRU stores the TDD frame format information into a preset table entry.
In specific implementation, according to the table entry parameter and the TDD frame format information, the symbol length and DL-UL indication information corresponding to each symbol are stored in different addresses of a table entry, and each row of the table entry stores DL-UL indication information of one symbol; and switching and storing the DL-UL indication information to a first table item and a second table item according to a preset switching period.
That is, because it takes time for RRU to report message storage, hardware accelerator to extract and generate TDD, BBU needs to transmit TDD frame format information in advance. In order not to affect the normal use of the TDD frame format information at the current time, the storage of the TDD frame format information is divided into two entries, i.e. a first entry and a second entry. The two table entries are switched in a ping-pong manner, and the frame format information issued in advance is stored in the A table, namely the first table entry, and the TDD frame format information a is generated; the currently used TDD frame format information is stored in the B table, that is, the second table entry is switched to the a table when the switching period comes, the TDD frame format information a is used, and the B table updates the TDD frame format information.
It should be noted that the predetermined switching period in the embodiment of the present invention may be set to 10ms or an integral multiple time of the predetermined uplink and downlink switching period, and the like, and in specific implementation, a person skilled in the art may set the predetermined switching period according to actual needs.
In a specific implementation, the entry parameter of the preset entry in the embodiment of the present invention may include: table entry depth, cycle period of DL/UL configuration, number of symbols within a predetermined switching period switch period time, and slot period time length (i.e., predetermined switching period);
the above parameters may be set according to actual requirements, where when the symbol length of the TDD frame format information is equal to the number of symbols in the switching period, it indicates that the first entry/the second entry (i.e., the a/B entries) adopt a tight arrangement mode, and the arrangement mode may save storage space, and when the symbol length is less than the switching period, it indicates that the entries are equally spaced segments, and when performing dynamic TTI scheduling (DL-UL absolute time is unchanged), it may only update the entry of a slot therein, and it is not necessary to reconfigure the entire table, thereby saving software overhead.
The embodiment of the invention generates the TDD control signal based on the TDD frame format information, which comprises the following steps:
in a first preset switching period, generating a TDD control signal according to DL-UL indication information stored in the first table entry; storing the received TDD frame format information issued by the BBU to the second table entry according to the table entry parameter and the TDD frame format information, and storing the symbol length and DL-UL indication information corresponding to each symbol to the second table entry;
after the preset switching period is reached, namely in a second preset switching period, generating a TDD control signal based on DL-UL indication information stored in the second table entry, and storing the received TDD frame format information sent by the BBU and the symbol length and DL-UL indication information corresponding to each symbol to the first table entry according to the table entry parameters;
and circularly switching to execute the steps after the preset switching period is reached.
That is to say, in the embodiment of the present invention, the first table entry and the second table entry perform ping-pong switching operation, where one table entry performs storage operation, and the other table entry performs TDD control signal generation operation, and the two table entries alternately operate to realize cooperative operation of TDD frame format information storage and TDD control signal generation.
In the embodiment of the present invention, receiving DL-UL indication information from the BBU through pseudo IQ transmission of the IF1 port includes: and receiving the DL-UL indication information of the symbol sent by the BBU through the pseudo-IQ associated path of each symbol, or sending the DL-UL indication information of all symbols in each time slot through the pseudo-IQ of the first symbol of each time slot. And the hardware accelerator extracts the DL-UL indication information in real time to generate a TDD control signal.
Specifically, the embodiment of the present invention provides two methods for generating a TDD control signal in real time, which respectively include:
the method comprises the steps that a BBU transmits TDD frame format information to an RRU through an Ethernet real-time message, and after the RRU stores the information in a cache region, a hardware accelerator of the RRU generates TDD;
and secondly, transmitting TDD parameters, namely DL-UL indication information, through the pseudo IQ of the IF1 port, and sending the DL-UL indication information of the symbol along with the pseudo IQ of each symbol, or sending the DL-UL indication information of all symbols in each time slot along with the pseudo IQ of the first symbol of each time slot, and extracting the indication information in real time by a hardware accelerator to generate a TDD control signal.
In specific implementation, because the time of generating the DL-UL indication information may be misaligned with the data and the frame header, after the TDD control signal is generated, the embodiment of the present invention performs alignment processing on the generated TDD identifier, i.e., the DL-UL indication information, and the data.
In order to better explain the method implemented by the present invention in detail, the method described in the present invention is explained by taking TDD frame format information sent by a BBU through an ethernet real-time message as an example, and by using a specific example:
firstly, issuing frame format information:
the BBU sends the TDD frame format information to the RRU in an Ethernet real-time message mode in advance for a certain time or an uplink and downlink switching period.
And the RRU analyzes the TDD frame format information in the real-time message and stores the TDD frame format information in the table entry A/B.
Step two, table item configuration:
the A/B table entry can be set whether to enable or not, the table entry depth can be set, the storage position of the frame format information of each symbol in the table entry can be set, whether to arrange the storage among the symbols closely or not can be supported, whether to switch the table entries or not and the switching time can be configured.
As shown in fig. 2, it is a representation intention of updating switching a and B according to an embodiment of the present invention, and describes a symbol information storage address jump in a table entry, an inter-slot address jump, an a/B table entry reading method, and a timing relationship of table entry switching. Taking the above downlink switching period of 5ms as an example, each line in the table entry stores frame format information of one symbol, the depth of each table entry may be set to 5ms or 10ms, and the switching period of the a/B table is also set to 5ms or 10ms. When the B table requests updating, the A table works; when the A table requests to be updated, the B table works, and seamless switching and use can be met when the time slot ratio is changed.
Thirdly, generating a TDD control signal:
and the hardware accelerator generates a TDD control signal according to the frame format information in the table entry.
The table entry parameters of the embodiment of the invention are as follows:
table Length: the depth of the frame structure configuration table is 560 symbol info information pre-stored according to a 10ms frame period, corresponding to a 60khz subcarrier interval, and 14 (symbols) x40 (slots) frame structure definition. The method can avoid the condition that the list items do not need to be refreshed and switched all the time when the dynamic TDD is not needed in the early stage, thereby greatly reducing the software overhead;
DL/UL circle period (slotA): indicating the cycle period of the DL/UL configuration, the initial value of the read address is controlled by using a circle _ cnt counter. And configuring the length value by taking the working clock as a unit. Typical values are: 0.125ms, 0.25ms, 0.5ms, 0.625ms,1ms, 1.25ms,2ms, 2.5ms, 5ms, 10ms, or 20ms, or the like;
switch offset: the number of symbols in the switched period is indicated as the offset address amount of the Table Length address segment. The number of symbols is configured with a numerical value, typically: 7. 14, 28, 56, 70, 140, 280 or 560, and so forth. According to the switch offset, the initial address of each segment of the Table can be obtained;
switch period (slotB): the slot cycle time length is expressed, namely, the length of the preset switching cycle, a slot _ cnt counter is used for controlling the read address to directly jump to the head address of the next slot, and the number of effective symbol table entries in the switch period is < = switch offset;
and configuring the length value by taking the working clock as a unit. Typical values are: 0.125ms, 0.25ms, 0.5ms, 0.625ms,1ms, 1.25ms,2ms, 2.5ms, 5ms, 10ms, 20ms, etc.;
symbol info: configuring an item in the table, wherein the item consists of fields of symb _ length, symb _ tdd and symb _ dtx;
switch period and switch offset:
1. when switch offset, symbol length, and = switch period, it is equivalent to that the entries of symbol info are closely arranged, and this storage manner can save the storage space;
2. when switch offset is symbol length > switch period, it is equivalent to that symbol info entry is segmented at equal intervals according to switch offset. When the software updating switches the AB table strategy, only the table entry of a certain slot can be updated without reconfiguring the whole table when the dynamic TTI time division scheduling (DL-UL absolute time is unchanged), so that the storage mode can save software overhead.
The fourth step: and repeating the first step and the third step.
Compared with the prior art, the method provided by the embodiment of the invention achieves the effect of dynamically generating the DL-UL indication information in real time in a seamless switching manner, saves the TDD generation time, improves the granularity of TDD state indication, achieves the symbol level, and can meet the requirements of a 5G NR self-contained frame structure and transmission delay.
A second embodiment of the present invention provides an apparatus for generating a 5G TDD control signal, referring to fig. 3, the apparatus including:
the first generation unit is used for receiving TDD frame format information sent by the baseband processing unit BBU through an Ethernet real-time message and generating a TDD control signal based on the TDD frame format information; the TDD frame format information comprises symbol length information and uplink and downlink DL-UL indication information in a 5G multi-subcarrier interval NR frame structure;
or,
and the second generation unit is used for receiving DL-UL indication information transmitted by a pseudo IQ field formed by an I path and a Q path which are orthogonal through a frequency domain data segmentation IF1 port of the BBU and generating a TDD control signal based on the DL-UL indication information.
The device provided by the embodiment of the invention receives TDD frame format information issued by the BBU through the Ethernet real-time message mode of the first generation unit, or directly receives DL-UL indication information transmitted by the BBU through a pseudo IQ of an IF1 port through the second generation unit, and generates a TDD control signal according to the TDD frame format information or the DL-UL indication information, thereby effectively solving the problem that the existing 5G TDD control signal can not be generated.
It should be noted that, the frame format information of the embodiment of the present invention includes symbol length information and DL-UL indication information, or may further include a DTX identifier, that is, a power saving identifier.
For example, if the symbol length of the TDD frame format information is set to 14, the corresponding DL-UL indication information and the power saving flag are set for each symbol. And then, generating a TDD control signal according to the DL-UL indication information corresponding to each symbol.
In specific implementation, the first generating unit in the embodiment of the present invention is further configured to, after receiving TDD frame format information sent by the BBU through an ethernet real-time message, store the TDD frame format information in a preset entry before generating a TDD control signal based on the TDD frame format information.
In specific implementation, the first generating unit stores DL-UL indication information corresponding to each symbol in different addresses of a preset entry according to the entry parameter and the TDD frame format information, where each row of the preset entry stores a symbol length of one symbol and DL-UL indication information, and switches and stores the symbol length and the DL-UL indication information to a first entry and a second entry according to the predetermined switching period, where the preset entry includes the first entry and the second entry.
In addition, the first generating unit of the implementation of the present invention generates a TDD control signal according to the DL-UL indication information stored in the first table entry in a first predetermined switching period; storing the received TDD frame format information issued by the BBU to the second table entry according to the table entry parameter and the TDD frame format information, and storing the symbol length and DL-UL indication information corresponding to each symbol to the second table entry; in a second preset switching period, generating a TDD control signal based on DL-UL indication information stored in the second table entry, and storing received TDD frame format information issued by the BBU into the first table entry according to the table entry parameters and the TDD frame format information, wherein the symbol lengths and the DL-UL indication information correspond to all symbols; and after the preset switching period is reached, circularly executing the steps.
In a specific implementation, in this embodiment of the present invention, the second generating unit receives the DL-UL indication information of the BBU sent this symbol through the pseudo IQ associated channel of each symbol, or issues the DL-UL indication information of all symbols in each slot through the pseudo IQ of the first symbol of each slot.
Since the time of generating the DL-UL indication information may not be aligned with the data or the frame header, the embodiment of the present invention further performs alignment of the DL-UL indication information and the data on the TDD control signal through the alignment unit after generating the TDD control signal.
For a detailed description of the apparatus according to the embodiment of the present invention, the apparatus according to the first transmission mode of the present invention will be described in detail by a specific example with reference to fig. 4:
TDD frame format information transmission module: the BBU advances 10ms or an uplink and downlink switching period, and sends the TDD frame format information to the RRU in a real-time message form. The special field of the real-time message can be defined, and the loaded core cleaning part can be quickly analyzed into the format of each symbol in the table entry.
TDD frame format information memory module: and configuring the TDD frame format and the symbol number which are analyzed from the received real-time message into an address corresponding to the symbol in the A/B table item.
In specific implementation, after the TDD frame format information storage module configures the analyzed TDD frame format into the a/B table entry, the embodiment of the present invention further uses the TDD frame format information switching and updating module to enable the B table to work normally when the a table is updated. The switching time sequence of the two table entries is determined by the table entry depth and the uplink and downlink switching period.
A TDD generation module: and generating a TDD indication, namely uplink, downlink or GP, of each symbol according to the configuration information in the table entry or the DL-UL mark analyzed from the pseudo IQ.
TDD time delay adjustment module: the module mainly completes alignment with data because the time generated by TDD may be misaligned with data and frame headers.
After the TDD frame format information transmission module finishes frame format transmission, according to the switching identifier of the TDD frame format information switching and updating module and the table item A or B to be updated, the TDD frame format information storage module stores the switching identifier into the corresponding table item, and meanwhile, the TDD generation module generates a TDD identifier which is sent to each node of the system for use through the TDD delay adjustment module. The TDD frame format information storage module, the TDD frame format information switching and updating module and the TDD generation module are a continuous updating and switching process.
It should be noted that the functions of the above modules are completed by the above first generating unit according to the embodiment of the present invention.
The relevance of the embodiments of the present invention can be understood with reference to the first embodiment of the present invention, which is not discussed in detail herein.
A third embodiment of the invention provides a computer-readable storage medium storing a signal-mapped computer program which, when executed by at least one processor, performs the steps of the method of any one of the first embodiments of the invention. The details of which may be understood with reference to the first embodiment of the present invention are not discussed in detail herein.
A fourth embodiment of the present invention provides a base station, where the base station includes a processor and a storage device, where the storage device stores multiple instructions to implement a method for generating a 5G TDD control signal, and the processor executes the multiple instructions to implement the steps of any one of the methods in the first embodiment of the present invention. The details of which can be understood with reference to the first embodiment of the present invention are not discussed in detail herein.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Claims (15)

1. A method for generating a 5G Time Division Duplex (TDD) control signal, comprising:
receiving TDD frame format information issued by a baseband processing unit BBU through an Ethernet real-time message, and generating a TDD control signal based on the TDD frame format information; the TDD frame format information comprises symbol length information and uplink and downlink DL-UL indication information in a 5G multi-subcarrier interval NR frame structure;
the TDD frame format information is stored in a preset table entry, and the preset table entry is used for alternately performing the storage and the generation according to a preset switching period;
or,
receiving DL-UL indication information transmitted by a BBU through a pseudo IQ field formed by an I path and a Q path orthogonal to a frequency domain data splitting IF1 port, and generating a TDD control signal based on the DL-UL indication information;
wherein, receiving the DL-UL indication information from the BBU through the pseudo IQ transmission of the IF1 port comprises:
and receiving the DL-UL indication information of the symbol sent by the BBU through the pseudo-IQ associated path of each symbol, or sending the DL-UL indication information of all symbols in each time slot through the pseudo-IQ of the first symbol of each time slot.
2. The method of claim 1, wherein receiving the TDD frame format information issued by the BBU through an ethernet real-time message includes:
and receiving TDD frame format information which is issued by an Ethernet real-time message in advance by 0.125ms-20ms of BBU or integral multiple time of a preset uplink and downlink switching period.
3. The method according to claim 1, wherein after receiving TDD frame format information issued by the BBU through an ethernet real-time message, and before generating a TDD control signal based on the TDD frame format information, the method further comprises:
and storing the TDD frame format information into a preset table entry.
4. The method of claim 3, wherein the entry parameters of the default entry include one or more of the following: the depth of the table entry, the cycle period of the uplink/downlink DL/UL configuration, the number of symbols in the switching period time and the preset switching period;
storing the TDD frame format information into a preset entry, including:
storing the symbol length and DL-UL indication information corresponding to each symbol into different addresses of a preset table entry according to the table entry parameter and the TDD frame format information, wherein each row of the preset table entry stores DL-UL indication information of one symbol;
and switching and storing the DL-UL indication information in the TDD frame format information into a first table entry and a second table entry according to the preset switching period, wherein the preset table entry comprises the first table entry and the second table entry.
5. The method of claim 4,
the preset switching period is 10ms or integral multiple time of a preset uplink and downlink switching period.
6. The method of claim 4, wherein generating the TDD control signal based on the TDD frame format information comprises:
in a first preset switching period, generating a TDD control signal according to DL-UL indication information stored in the first table entry; storing the received TDD frame format information issued by the BBU into the second table according to the table parameter and the TDD frame format information, and storing the symbol length and DL-UL indication information corresponding to each symbol into the second table;
in a second preset switching period, generating a TDD control signal based on DL-UL indication information stored in the second table entry, and storing received TDD frame format information issued by the BBU to the first table entry according to the table entry parameter and the TDD frame format information, wherein the symbol length and the DL-UL indication information corresponding to each symbol are stored in the first table entry;
and after the preset switching period is reached, circularly executing the steps.
7. The method according to any of claims 1-6, further comprising, after generating the TDD control signal:
and aligning the DL-UL indication information and the data to the TDD control signal.
8. An apparatus for generating a 5G TDD control signal, comprising:
the first generating unit is used for receiving TDD frame format information sent by the baseband processing unit BBU through an Ethernet real-time message and generating a TDD control signal based on the TDD frame format information; the TDD frame format information comprises symbol length information and uplink and downlink DL-UL indication information in a 5G multi-subcarrier interval NR frame structure;
the TDD frame format information is stored in a preset table entry, and the preset table entry is used for alternately performing the storage and the generation according to a preset switching period;
or,
a second generating unit, configured to receive DL-UL indication information transmitted by a pseudo IQ field formed by an I path and a Q path orthogonal to the BBU through frequency domain data segmentation IF1 port, and generate a TDD control signal based on the DL-UL indication information;
the second generating unit is specifically configured to receive the DL-UL indication information of the BBU sent this symbol through the pseudo IQ associated channel of each symbol, or issue the DL-UL indication information of all symbols in each slot through the pseudo IQ of the first symbol of each slot.
9. The apparatus of claim 8,
the first generation unit is further configured to receive TDD frame format information sent by an ethernet real-time message in advance by 0.125ms-20ms of BBU or by an integral multiple time of a preset uplink and downlink switching period.
10. The apparatus of claim 8,
the first generation unit is further configured to, after receiving TDD frame format information issued by the BBU through an ethernet real-time message, store the TDD frame format information into a preset entry before generating a TDD control signal based on the TDD frame format information.
11. The apparatus of claim 10, wherein the entry parameters of the preset entry comprise one or more of the following: the depth of the table entry, the cycle period of DL/UL configuration, the number of symbols in the time of the switching period and the preset switching period;
the first generating unit is further configured to store, according to the entry parameter and the TDD frame format information, a symbol length and DL-UL indication information corresponding to each symbol into different addresses of a preset entry, where each row of the preset entry stores DL-UL indication information of one symbol, and switch and store the DL-UL indication information into a first entry and a second entry according to the predetermined switching period, where the preset entry includes the first entry and the second entry.
12. The apparatus of claim 11,
the first generating unit is further configured to generate a TDD control signal according to the DL-UL indication information stored in the first table entry in a first predetermined switching period; storing the received TDD frame format information issued by the BBU into the second table according to the table parameter and the TDD frame format information, and storing the symbol length and DL-UL indication information corresponding to each symbol into the second table; in a second preset switching period, generating a TDD control signal based on DL-UL indication information stored in the second table entry, and storing received TDD frame format information issued by the BBU to the first table entry according to the table entry parameter and the TDD frame format information, wherein the symbol length and the DL-UL indication information corresponding to each symbol are stored in the first table entry; and after the preset switching period is reached, circularly executing the steps.
13. The apparatus according to any one of claims 8-12, further comprising:
and an alignment unit, configured to perform alignment between DL-UL indication information and data for the TDD control signal after generating the TDD control signal.
14. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a signal-mapped computer program which, when executed by at least one processor, implements the steps of the method according to any one of claims 1-7.
15. A base station comprising a processor and a memory device, the memory device having a plurality of instructions stored therein for implementing a method of generating a 5G time division duplex, TDD, control signal, the processor executing the plurality of instructions to implement the steps of the method of any of claims 1-7.
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