CN111800874B - Radio frequency identification method based on 5G communication - Google Patents
Radio frequency identification method based on 5G communication Download PDFInfo
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- CN111800874B CN111800874B CN202010466855.9A CN202010466855A CN111800874B CN 111800874 B CN111800874 B CN 111800874B CN 202010466855 A CN202010466855 A CN 202010466855A CN 111800874 B CN111800874 B CN 111800874B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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Abstract
The invention discloses a radio frequency identification method based on 5G communication, which comprises the following steps: the method comprises the steps that 5G network equipment determines radio frequency excitation reference sequence configuration information of a radio frequency identification tag, the 5G network equipment sends the radio frequency excitation reference sequence to the radio frequency identification tag according to the reference sequence configuration information, the radio frequency identification tag performs blind detection on the received radio frequency excitation reference sequence so as to determine the time domain position of feedback information configured for the radio frequency identification tag by the 5G network equipment, the radio frequency identification tag determines the power value of the feedback information and sends the radio frequency identification tag feedback information according to the time domain position of the 5G network equipment, the 5G network equipment receives and analyzes the radio frequency identification tag feedback information, the method utilizes a guard interval between the upper line and the lower line of the 5G network equipment to send the feedback information of the radio frequency identification tag, interference of other large signals to radio frequency identification services can be avoided, and simultaneously utilizes the 5G network equipment to reduce the complexity and the deployment cost of a radio frequency identification card reader, has wide market prospect.
Description
Technical Field
The invention belongs to the technical field of 5G communication, and particularly relates to a radio frequency identification method based on 5G communication.
Background
The radio frequency identification is a non-contact automatic identification technology using a radio frequency technology, and has the advantages of high transmission rate, collision prevention, large-batch reading, moving process reading and the like, so the radio frequency identification technology has great application potential in various fields of logistics and supply chain management, production management and control, anti-counterfeiting and safety control, traffic management and control and the like.
In the prior art, a card reader needs to be independently deployed in a radio frequency identification system, and the communication distance between the card reader and a tag is short, which is not favorable for application scenes and deployment of the radio frequency identification system, and further increases related deployment cost.
Accordingly, further developments and improvements in the art are desired.
Disclosure of Invention
Aiming at various defects in the prior art, in order to solve the problems, a radio frequency identification method based on 5G communication is provided, and the method utilizes 5G network equipment to reduce the complexity and the deployment cost of a radio frequency identification card reader.
In order to achieve the purpose, the invention provides the following technical scheme:
a radio frequency identification method based on 5G communication comprises the following steps:
the 5G network equipment determines radio frequency excitation reference sequence configuration information for exciting the radio frequency identification tag;
the 5G network equipment sends a radio frequency excitation reference sequence to the radio frequency identification tag according to the determined radio frequency excitation reference sequence configuration information;
the radio frequency identification tag carries out blind detection on the received radio frequency excitation reference sequence according to the known reference sequence pattern, utilizes peak energy detection to determine the received radio frequency excitation reference signal pattern, thereby determining the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment, and records the receiving power value P of the excitation reference sequenceDL_RFurther determining parameters of the excitation reference sequence sent by the 5G network equipment;
receiving power value P of radio frequency identification label according to recorded excitation reference sequenceDL_RDetermining a power value P for transmitting RFID tag feedback informationUL_TSending the feedback information of the radio frequency identification tag according to the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment;
and the 5G network equipment receives and analyzes the radio frequency identification label feedback information.
Preferably, the radio frequency excitation reference sequence configuration information includes time domain resource configuration information, specifically: and adopting the time domain resources which are the same as the time domain resources of the 5G network equipment for sending the system information and the synchronous information blocks, or adopting the time domain resources of the 5G network equipment for sending the system information and the synchronous information blocks with the period of M times.
Preferably, the radio frequency excitation reference sequence configuration information includes frequency domain resource configuration information, specifically: the method comprises the steps that N subcarriers adjacent to a system information and synchronization block sent by 5G network equipment are adopted, and the configuration mode is that the N subcarriers are arranged at the upper edge of the frequency domain of the system information and synchronization block sent, or the N subcarriers are arranged at the lower edge of the frequency domain of the system information and synchronization block sent, or the K subcarriers are arranged at the upper edge of the frequency domain of the system information and synchronization block sent, and the N-K subcarriers are arranged at the upper edge of the frequency domain of the system information and synchronization block sent.
Preferably, the radio frequency excitation reference sequence configuration information includes reference sequence resource configuration information, and specifically includes: the method for indicating the reference sequence pattern adopted by the sending of the excitation signal comprises the following steps:
the radio frequency identification tag is characterized by using a first reference sequence adopted by 5G network equipment to represent a period which is the same as a period for transmitting system information and a synchronous information block, and using a second reference sequence to represent a transmission period which is L times the period for transmitting the system information and the synchronous information block, wherein L is a natural number;
the reference sequence pattern is further used to characterize the time domain position for the rfid tag feedback information, specifically the symbol interval from the sending system information and synchronization information block end time position.
Preferably, the parameters of the excitation reference sequence sent by the 5G network device are specifically: and one or both of the transmission period of the excitation reference sequence transmitted by the 5G network equipment and the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment.
Preferably, the time domain position of the feedback information configured by the radio frequency identification tag specifically is: the method is used for the guard time interval between the uplink signal and the downlink signal in the 5G network equipment.
Preferably, the power value P of the rfid tag feedback informationUL_TThe specific determination method comprises the following steps: determining a default power value P of the radio frequency identification tag for reading a 5G network device transmission excitation reference signal from a memoryDL_TDetermining the lowest receiving power value P of the 5G network equipment for receiving the feedback informationUL_RThen by the formula "PUL_T＝PUL_R+PDL_T-PDL_R' determining power value P of RFID tag feedback informationUL_T。
Has the advantages that:
the invention provides a radio frequency identification method based on 5G communication, which utilizes a guard interval between an upper line and a lower line of 5G network equipment to send feedback information of a radio frequency identification label, can reduce transmitting power, can avoid the interference of other large signals to radio frequency identification services, and simultaneously utilizes the 5G network equipment to reduce the complexity and the deployment cost of a radio frequency identification card reader, thereby having wide market prospect.
Drawings
Fig. 1 is a flowchart of a radio frequency identification method based on 5G communication in an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.
As shown in fig. 1, the present invention provides a radio frequency identification method based on 5G communication, including:
s100: the method comprises the following steps that the 5G network equipment determines radio frequency excitation reference sequence configuration information for exciting the radio frequency identification tag, wherein the radio frequency excitation reference sequence configuration information comprises time domain resource configuration information, and specifically comprises the following steps: adopting time domain resources which are the same as the time domain resources of the 5G network equipment for sending the system information and the synchronous information blocks, or adopting the time domain resources of the 5G network equipment for sending the system information and the synchronous information blocks with the period M times;
the method further comprises frequency domain resource configuration information, specifically: the method comprises the steps that N subcarriers adjacent to a 5G network device sending system information and a synchronization block are adopted, and the configuration mode is that the N subcarriers are arranged on the upper edge of the frequency domain of the sending system information and synchronization block, or the N subcarriers are arranged on the lower edge of the frequency domain of the sending system information and synchronization block, or the K subcarriers are arranged on the upper edge of the frequency domain of the sending system information and synchronization block, and the N-K subcarriers are arranged on the upper edge of the frequency domain of the sending system information and synchronization block.
The sub-carriers at the upper edge and the lower edge of the system information and synchronization information block sent by the 5G network equipment can fully utilize the wave band of the 5G network equipment under the condition of not influencing other work of the 5G network equipment.
The method further includes reference sequence resource configuration information, specifically: the method for indicating the reference sequence pattern adopted by the sending of the excitation signal comprises the following steps:
the radio frequency identification tag is characterized by using a first reference sequence adopted by 5G network equipment to represent a period which is the same as a period for transmitting system information and a synchronous information block, and using a second reference sequence to represent a transmission period which is L times the period for transmitting the system information and the synchronous information block, wherein L is a natural number;
the reference sequence pattern is further used to characterize the time domain position for the rfid tag feedback information, specifically the symbol interval from the sending system information and synchronization information block end time position.
S200: the 5G network device sends the radio frequency excitation reference sequence to the radio frequency identification tag according to the determined radio frequency excitation reference sequence configuration information, specifically: and one or both of the transmission period of the excitation reference sequence transmitted by the 5G network equipment and the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment.
S300: the radio frequency identification tag carries out blind detection on the received radio frequency excitation reference sequence according to the known reference sequence pattern, utilizes peak energy detection to determine the received radio frequency excitation reference signal pattern, thereby determining the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment, and records the receiving power value P of the excitation reference sequenceDL_RAnd further determining parameters of the excitation reference sequence sent by the 5G network device, where the time domain position of the feedback information configured by the radio frequency identification tag specifically is: uplink signal and downlink signal in 5G network equipmentThe guard time interval between the numbers can ensure that when the radio frequency identification tag uses lower power to transmit the feedback information, the data can be received by correct 5G network equipment, and the data can not interfere with other information, and can not be interfered by other 5G network equipment to cause the situations of incorrect information reception or unsmooth information reception.
S400: receiving power value P of radio frequency identification label according to recorded excitation reference sequenceDL_RDetermining a power value P for transmitting RFID tag feedback informationUL_TThe specific method comprises the following steps: determining a default power value P of the radio frequency identification tag for reading a 5G network device transmission excitation reference signal from a memoryDL_TDetermining the lowest receiving power value P of the 5G network equipment for receiving the feedback informationUL_RThen by the formula "PUL_T＝PUL_R+PDL_T-PDL_R' determining power value P of RFID tag feedback informationUL_TAnd sending the feedback information of the radio frequency identification tag according to the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment.
S500: and the 5G network equipment receives and analyzes the radio frequency identification label feedback information.
The technical scheme of the invention is elaborated by specific embodiments, and the method comprises the following steps:
step 1: the 5G network equipment determines radio frequency excitation reference sequence configuration for exciting the radio frequency identification tag, wherein the radio frequency excitation reference sequence configuration includes time domain resource configuration information, and specifically comprises the following steps: adopting time domain resources which are the same as the time domain resources of the 5G network equipment for sending the system information and the synchronous information blocks, or adopting the time domain resources of M times of the period of the 5G network equipment for sending the system information and the synchronous information blocks;
the method further comprises frequency domain resource configuration information, specifically: n sub-carriers adjacent to a system information and synchronous information block sent by 5G network equipment are used for bearing the radio frequency excitation reference signal; the method includes multiple configurations, such as N subcarriers that are upward in the upper edge of the frequency domain for transmitting the system information and synchronization information blocks, or N subcarriers that are downward in the lower edge of the frequency domain for transmitting the system information and synchronization information blocks; or K subcarriers with upward edge on the frequency domain of the sending system information and synchronization information block and N-K subcarriers with downward edge on the lower edge of the frequency domain of the sending system information and synchronization information block;
the method further includes reference sequence resource configuration information, specifically: indicating a reference sequence pattern adopted by sending an excitation signal, and in order to reduce the blind detection times of a radio frequency tag, determining the time domain configuration information by the radio frequency identification tag through a reference sequence used by 5G network equipment, wherein the specific method comprises the following steps: the 5G network equipment adopts a reference sequence 1 to represent the same period of using and sending the system information and the synchronous information block, and adopts a reference sequence 2 to represent the sending period of using and sending the system information and the synchronous information block by 2 times; further, a reference sequence pattern may also be used to represent a time domain position for the feedback information of the rfid tag, specifically, a symbol interval with the time position of the end of the sending system information and synchronization information block, such as a reference sequence 1 representing 1 OFDM symbol interval, and a reference sequence 2 representing 2 OFDM symbols interval; the time domain position of the radio frequency identification tag feedback information is a protection time interval used between an uplink signal and a downlink signal in the 5G network equipment, so that when the radio frequency identification tag transmits the feedback information at a lower transmission power, data can be correctly received by the 5G network equipment.
And 2, the 5G network equipment sends the radio frequency excitation reference sequence to the radio frequency identification tag according to the radio frequency excitation reference sequence configuration information determined in the step 1.
And step 3: the radio frequency identification tag performs blind detection on the excitation reference sequence sent by the 5G network equipment by using a known reference sequence pattern, determines the excitation reference signal pattern sent by the 5G network equipment by using related wind energy detection, and records the receiving power value of the excitation reference sequence.
And 4, step 4: and the radio frequency identification tag determines the sending period of the excitation reference sequence sent by the 5G network equipment and/or the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment according to the determined excitation reference sequence pattern sent by the 5G network equipment.
And 5: and the radio frequency identification tag determines the time position of the 5G network equipment for sending the system information and the synchronous information block according to the detected excitation reference sequence time, and further determines the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment in combination with the step 4.
Step 6: the radio frequency identification tag receives the power value P according to the determined excitation reference sequenceDL_RDetermining a power value P required for transmitting feedback informationUL_TWhen the power generated by the excitation signal is determined to be larger than the power value required by the feedback information transmission, the feedback information is further transmitted according to the determined time domain position of the feedback information; wherein the determining of the power value P required for transmitting the feedback informationUL_TThe method comprises the following steps: the radio frequency identification tag reads the default power value P of the excitation reference signal transmitted by the 5G network equipment from the memoryDL_TAnd the lowest received power P of the 5G network equipment for receiving the feedback informationUL_RThen by the formula "PUL_T＝PUL_R+PDL_T-PDL_RAnd calculating to obtain.
And 7: and the 5G network equipment receives the feedback information at the time domain position of the feedback information and analyzes the corresponding feedback information.
While the invention has been described in detail in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (6)
1. A radio frequency identification method based on 5G communication is characterized by comprising the following steps:
the 5G network equipment determines radio frequency excitation reference sequence configuration information for exciting the radio frequency identification tag;
the 5G network equipment sends the radio frequency excitation reference sequence to the radio frequency identification tag according to the determined radio frequency excitation reference sequence configuration information;
the radio frequency identification tag performs blind detection on the received radio frequency excitation reference sequence according to the known reference sequence pattern, and determines the received emission by using peak energy detectionFrequency excitation reference signal pattern, thereby determining the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment, and recording the receiving power value P of the excitation reference sequenceDL_RFurther, parameters of the excitation reference sequence sent by the 5G network device are determined, where the parameters of the excitation reference sequence specifically are: the 5G network equipment configures the time domain position of the feedback information for the radio frequency identification tag;
receiving power value P of radio frequency identification label according to recorded excitation reference sequenceDL_RDetermining a power value P for transmitting RFID tag feedback informationUL_TAnd sending the radio frequency identification tag feedback information according to the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment, wherein the time domain position of the feedback information configured for the radio frequency identification tag specifically comprises: the protection time interval is used between an uplink signal and a downlink signal in the 5G network equipment;
and the 5G network equipment receives and analyzes the radio frequency identification label feedback information.
2. The radio frequency identification method based on 5G communication according to claim 1, wherein the radio frequency excitation reference sequence configuration information includes time domain resource configuration information, specifically: and adopting the time domain resources which are the same as the time domain resources of the 5G network equipment for sending the system information and the synchronous information blocks, or adopting the time domain resources of the 5G network equipment for sending the system information and the synchronous information blocks with the period of M times.
3. The radio frequency identification method based on 5G communication according to claim 1, wherein the radio frequency excitation reference sequence configuration information includes frequency domain resource configuration information, specifically: the method comprises the steps that N subcarriers adjacent to a system information and synchronization block sent by 5G network equipment are adopted, and the configuration mode is that the N subcarriers are arranged at the upper edge of the frequency domain of the system information and synchronization block sent, or the N subcarriers are arranged at the lower edge of the frequency domain of the system information and synchronization block sent, or the K subcarriers are arranged at the upper edge of the frequency domain of the system information and synchronization block sent, and the N-K subcarriers are arranged at the upper edge of the frequency domain of the system information and synchronization block sent.
4. The radio frequency identification method based on 5G communication according to claim 1, wherein the radio frequency excitation reference sequence configuration information includes reference sequence resource configuration information, specifically: the method for indicating the reference sequence pattern adopted by the sending of the excitation signal comprises the following steps:
the radio frequency identification tag is characterized by using a first reference sequence adopted by 5G network equipment to represent a period which is the same as a period for transmitting system information and a synchronous information block, and using a second reference sequence to represent a transmission period which is L times the period for transmitting the system information and the synchronous information block, wherein L is a natural number;
the reference sequence pattern is further used to characterize the time domain position for the rfid tag feedback information, specifically the symbol interval from the sending system information and synchronization information block end time position.
5. The radio frequency identification method based on 5G communication according to claim 1, wherein the parameters of the excitation reference sequence sent by the 5G network device are specifically: and one or both of the transmission period of the excitation reference sequence transmitted by the 5G network equipment and the time domain position of the feedback information configured for the radio frequency identification tag by the 5G network equipment.
6. The radio frequency identification method based on 5G communication according to claim 1, wherein the power value P of the radio frequency identification tag feedback informationUL_TThe specific determination method comprises the following steps: determining a default power value P of the radio frequency identification tag for reading a 5G network device transmission excitation reference signal from a memoryDL_TDetermining the lowest receiving power value P of the 5G network equipment for receiving the feedback informationUL_RThen by the formula "PUL_T＝PUL_R+PDL_T-PDL_R' determining power value P of RFID tag feedback informationUL_T。
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| CN113891356A (en) * | 2021-09-29 | 2022-01-04 | 中国信息通信研究院 | Wireless communication data information transmission method and equipment |
| CN116249118A (en) * | 2021-12-07 | 2023-06-09 | 华为技术有限公司 | Resource allocation method, device and communication equipment |
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