CN116997903A

CN116997903A - Signal transmission method and device

Info

Publication number: CN116997903A
Application number: CN202180095856.XA
Authority: CN
Inventors: 曲韦霖; 吴毅凌
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2023-11-03
Also published as: WO2022193189A1

Abstract

The embodiment of the application discloses a signal transmission method and a signal transmission device, which relate to the technical field of communication and can reduce the probability that different tags select the same spread spectrum sequence in the same time slot and improve the efficiency of the tag access network. The specific scheme is as follows: the tag determines an index of a first sequence in the first set according to the first information; the first information comprises one or more of identification information of a tag and pseudo-random number information generated by the tag, and the first set comprises a plurality of mutually orthogonal sequences; the tag performs spread spectrum processing on the reflected information bits according to a first sequence corresponding to the index of the first sequence; the tag sends the processed information to the network device.

Description

Signal transmission method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a signal transmission method and device.

Background

Passive internet of things (passive internet of things, passive IoT) is an important research direction in the field of current 5th generation mobile communication technology (5th generation,5G) or 5.5G internet of things. In a passive internet of things system, the network device and passive tag communication process includes a select passive tag process and an inventory passive tag process.

Wherein, in the passive tag inventory process, the passive tag receives query (query) signaling from the network device, the query signaling including a parameter Q, the passive tag receiving information from the network device (0, 2) ^Q -1) selecting a random number in the range of the counter and storing the random number in the time slot counter of the passive tag, at the moment, the passive tag with the value of 0 is selected to be transferred to an arbitration state, and the time slot counter is triggered to count down one by one until the passive tag enters a response state when the counter reaches 0, and the passive tag with the value of 0 directly enters the response state. The passive tag entering the response state responds to a 16-bit random number or pseudo random number (RN 16) to the network device, and then after the network device receives the RN16, responds to an Acknowledgement (ACK) containing the RN16 to the passive tag, at which point the passive tag is successfully acknowledged. The passive tag that is validated transitions to a validated state and reflects information about the passive tag to the network device, such as the passive tag's product electronic code (electronic product code, EPC), 16-bit cyclic redundancy check (16-bit cyclic redundancy check, CRC-16), etc.

However, since the value of the passive tag stored in the slot counter is randomly selected, the slot counter of the passive tags counts to 0 in the same slot, and the passive tags enter the response state at the same time, and respond to the RN16 and reflect the relevant information of the passive tags to the network device at the same time. At this time, the signals reflected by the passive tags towards the network device may overlap with each other, so that the network device may not be able to despread the signals reflected by the passive tags correctly, thereby reducing the efficiency of accessing the passive tags into the network.

Disclosure of Invention

The embodiment of the application provides a signal transmission method and a signal transmission device, which can reduce the probability that different labels select the same spread spectrum sequence in the same time slot and improve the efficiency of the label access network.

In order to achieve the above purpose, the embodiment of the application adopts the following technical scheme:

in a first aspect, there is provided a method of transmitting a signal, the method comprising: the tag determines an index of a first sequence in the first set according to the first information; the first information comprises one or more of identification information of a tag and pseudo-random number information generated by the tag, and the first set comprises a plurality of mutually orthogonal sequences; the tag performs spread spectrum processing on the reflected information bits according to a first sequence corresponding to the index of the first sequence; the tag sends the processed information to the network device.

Based on the method of the first aspect, the tag can determine the index of the first sequence in the first set according to the first information, and because the first information of different tags is different, the probability that multiple tags select the same sequence in the same time slot is reduced, and the reflected information bits are processed according to the first sequence, so that superposition interference between information processed by the tag and information responded by other tags can be avoided, and further the access efficiency of the tag can be improved.

In one possible design, the tag determines an index of a first sequence in the first set based on the first information, including: the label carries out first operation on the first numerical value according to the first information, and determines the index of the first sequence in the first set according to the operation result; wherein the first value is the maximum number of sequences in the first set for tag selection; alternatively, the first value is the maximum number of sequences for tag selection in a second set, the second set being a subset of the first set.

Based on the possible design, the tag can determine the index of the first sequence in the first set according to the first information and the first value, and then determine the first sequence from the subset of the first set according to the index of the first sequence, so that the despreading complexity of the network device can be reduced, and the probability that different tags select the same first sequence in the same time slot is further reduced.

In one possible design, the tag performs a first operation on a first value according to first information, including: and the tag performs modular operation on the first numerical value according to the first information.

Based on this possible design, the tag can efficiently select the corresponding first sequence.

In one possible design, the tag determines an index of a first sequence in the first set based on the first information, including: the label carries out first operation on the second value according to the first information, and determines the index of the second sequence in the third set according to the operation result; wherein the second value is the number of sequences in the third set; the tag determines an index of the first sequence according to the index of the second sequence and second information, wherein the second information comprises one or more of identification information of the tag and pseudo-random number information generated by the tag.

Based on the possible design, the probability that different tags select the same first sequence in the same time slot can be further reduced, and the access efficiency of the tags is improved.

In one possible design, the third set includes a plurality of mutually orthogonal sequences, the length of the sequences in the third set is smaller than the length of the sequences in the first set, and the sequences in the third set are base sequences of the sequences in the first set.

Based on this possible design, a set of selectable sequences of tags can be flexibly configured.

In one possible design, the tag receives indication information from the network device, the indication information indicating a first value; alternatively, the indication information indicates the second value.

Based on this possible design, the range of sequences that the tag can select can be flexibly indicated.

In a second aspect, there is provided a signal transmission method, the method comprising: the network equipment receives information after label processing, wherein the information after label processing is obtained by performing spread spectrum processing on reflected information bits by the labels according to a first sequence corresponding to an index of the first sequence in the first set; the index of the first sequence is determined by the tag according to the first information; the first information comprises one or more of identification information of a tag and pseudo-random number information generated by the tag, and the first set comprises a plurality of mutually orthogonal sequences; and the network equipment performs despreading processing on the information processed by the tag to obtain reflected information bits of the tag.

In one possible design, the index of the first sequence is determined by the tag from the first information, comprising: the index of the first sequence is determined by the operation result of the first operation of the label on the first numerical value according to the first information; wherein the first value is the maximum number of sequences in the first set for tag selection; alternatively, the first value is the maximum number of sequences for tag selection in a second set, the second set being a subset of the first set.

In one possible design, the index of the first sequence is determined by the tag from the first information, comprising: the index of the second sequence in the third set is determined by the operation result of the first operation of the label on the second value according to the first information; wherein the second value is the number of sequences in the third set; the index of the first sequence is determined by the tag according to the index of the second sequence and the second information; the second information comprises one or more of identification information of the tag and pseudo random number information generated by the tag.

In one possible design, the network device sends indication information to the tag, the indication information indicating the first value; alternatively, the indication information indicates the second value.

The technical effects of the second aspect or any one of the possible designs of the second aspect may be referred to the technical effects of the first aspect or any one of the possible designs of the first aspect, and will not be described herein.

In a third aspect, a tag is provided that may include one or more processors, one or more memories. The one or more memories are configured to store computer program code comprising computer instructions that, when executed by the one or more processors, cause the tag to perform the signal transmission method of the first aspect or any of the possible designs of the first aspect.

In a fourth aspect, a network device is provided that may include one or more processors, one or more memories, and a terminal. The one or more memories are configured to store computer program code comprising computer instructions that, when executed by the one or more processors, cause the network device to perform the signaling method of the second aspect or any of the possible designs of the second aspect.

In a fifth aspect, a computer readable storage medium is provided, which may be a readable non-volatile storage medium, in which instructions are stored which, when run on a computer, cause the computer to perform the signal transmission method according to the above-mentioned first aspect or any one of the possible designs of the second aspect or the second aspect.

In a sixth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the signal transmission method of the above-described first aspect or any one of the possible designs of the second aspect or the second aspect.

In a seventh aspect, a communication system is provided, which may include: a tag and a network device, the communication system may perform the signal transmission method of the first aspect or any one of the possible designs of the second aspect or the second aspect.

The technical effects caused by any design manner of the third aspect to the seventh aspect may be referred to the above-mentioned first aspect or any possible design of the second aspect, and will not be described herein.

Drawings

FIG. 1 is a schematic diagram of a communication process of a tag;

FIG. 2 is a schematic diagram of a communication process of an RFID system;

fig. 3a is a schematic diagram of a communication architecture according to an embodiment of the present application;

FIG. 3b is a schematic diagram of another communication architecture according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 5 is a flowchart of a signal transmission method according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a generated sequence according to an embodiment of the present application;

fig. 7 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 8 is a schematic diagram of a communication system according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings.

In the following, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying an indication of the number of technical features being indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Before describing the embodiments of the present application, some terms related to the embodiments of the present application will be explained:

passive internet of things refers to a transport network comprising passive (free) nodes. The passive node is not equipped with or mainly depends on power supply equipment such as a battery and the like, but acquires energy from the environment, and supports the passive node to sense, transmit and calculate data in a distributed mode. In general, the passive node may comprise a passive tag (passive tag) whose transceiver may be excited by a radio frequency field. For simplicity of description in embodiments of the present application, passive tags may alternatively be described as tags. The tag may cooperate with a network device to form a radio frequency identification (radio-frequency identification, RFID) system in which contactless automatic identification radio frequency technology may be applied.

In the working process of the RFID system, the network equipment controls the radio frequency module in the RFID system to transmit the radio carrier signal outwards through the antenna, when the tag enters the working area of the transmitting antenna, the tag can reflect the signal carrying the tag related information to the network equipment after being activated, and after the network equipment can receive the signal reflected by the tag through the antenna, the received signal is despread or decoded so as to obtain the related information of the tag. For example, the protocol control bit (PC) of the tag, the product electronic code (electronic product code, EPC) and the 16-bit cyclic redundancy check (16-bit cyclic redundancy check, CRC-16), thereby forming a complete communication link.

In the RFID air interface protocol international standardization organization (international organization for standardization, ISO) 18000-6C, tags are defined that employ dynamic slot hello (ALOHA) technology to reflect signals to network devices. Fig. 1 is a schematic diagram of a communication process of a tag, as shown in fig. 1, where the tag may receive a selection (select) signaling and a query (query) signaling from a network device, or may receive an Acknowledgement (ACK) returned by the network device in response to the RN16, or may receive a negative acknowledgement (negative acknowledgement, NACK) returned by the network device after sending a signal carrying information related to the tag. Wherein, the label received ACK indicates that the network device successfully receives the RN16 of the label response, and the label received NACK indicates the network The network device does not successfully receive the RN16 of the tag response, and the tag needs to repeatedly transmit the unsuccessfully reflected signal again. In fig. 1, the network device transmits a Continuous Wave (CW) containing a high level to the tag, from which the tag may extract energy for communication with the network device. For example, in FIG. 1 the tag is at T ₁ The CW is received and energy is derived therefrom for responding to an RN16 or for reflecting signals with tag-related information to the network device. Similarly, the tag may be at T ₂ 、T ₃ 、T ₄ The CW is received in time and energy is derived therefrom for signaling perception or response.

ISO 18000-6C prescribes that in a tag reflection link, a linear code modulation mode is adopted to modulate a signal to be reflected, for example, an information modulation mode of double-phase space code (bi-phase space coding, FM 0)/Miller (miller) line code+binary phase shift keying (binary phase shift keying, BPSK)/amplitude keying (amplitude shift keying, ASK) is adopted. However, the limitation of the linear code modulation mode is that the communication anti-interference capability of the tag reflection link is weak, and the coverage distance of the tag reflection signal link is severely limited.

In one possible design, a repeated or spread-spectrum + repeated manner may be used in the tag reflection link to reflect signals to the network device. For example, the tag may reflect the same signal multiple times to the network device, or the tag multiplies the reflected signal by a spreading sequence based on the reflected same signal. Wherein the spreading sequence may be preset or pre-stored by the tag itself. The tag reflects signals to the network equipment in the mode, the network equipment can combine and decode the received signals, and the received signal to noise ratio can be effectively improved, so that the coverage performance of the tag reflection link is improved.

The process of processing the reflected signal in the tag reflection link by using a preset or pre-stored spreading sequence and communicating with the network device may be as shown in fig. 2, and fig. 2 is a schematic diagram of a communication process of an RFID system. In fig. 2, tag 1 responds to the network device with an RN16 in slot 1, the network device responds to tag 1 with an ACK containing the RN16, tag 1 is successfully acknowledged, and then tag 1 reflects tag related information, such as the EPC of tag 1, to the network device. Similarly, the communication process between the tag 2 and the tag 3 and the network device after performing repeated query (queryrep) signaling is similar to that of the tag 1, and will not be repeated. When the counter value of the tag 4 in the time slot 3 is 0, the tag 4 enters a response state and responds to the network device with an RN16, the network device responds to the NACK containing the RN16 to the tag 4, the tag 4 is not confirmed, the repeated execution of the queryrep signaling is continued until the tag 4 is confirmed, and then the relevant information of the tag 4 is reflected to the network device.

However, if the preset spreading sequences in the tags that respond to the RN16 to the network device at the same time are the same in the same time slot, the signals reflected by the multiple tags in the time slot will be superimposed and interfered with each other, and the signals reflected by the multiple tags received by the network device cannot be despread correctly, thereby reducing the efficiency of accessing the tag into the network.

In order to reduce the probability that different tags select the same spread spectrum sequence in the same time slot and improve the efficiency of the tag access network, the embodiment of the application provides a signal transmission method, which specifically comprises the following steps: the tag determines an index of a first sequence in the first set according to the first information; the first information comprises one or more of identification information of a tag and pseudo-random number information generated by the tag, and the first set comprises a plurality of mutually orthogonal sequences; the tag performs spread spectrum processing on the reflected information bits according to a first sequence corresponding to the index of the first sequence; the tag sends the processed information to the network device.

The following describes a signal transmission method provided by an embodiment of the present application with reference to the drawings.

The signal transmission method provided by the embodiment of the application can be applied to various communication systems, such as: the long term evolution (long term evolution, LTE) system, a fifth generation (5th generation,5G) mobile communication system, a future communication system, or a system in which a plurality of communication systems are integrated, etc., the embodiments of the present application are not limited. Wherein 5G may also be referred to as New Radio (NR). The communication system provided by embodiments of the present application may be a public land mobile network (public land mobile network, PLMN), a device-to-device (D2D) network, a machine-to-machine (machine to machine, M2M) network, an internet of things (internet of things, ioT) or other network.

For example, the embodiment of the application can be applied to a passive internet of things network comprising a helper terminal (helper), a tag (tag), a macro base station (macro) and a micro base station (pico).

Fig. 3a is a schematic diagram of a communication architecture according to an embodiment of the present application. As shown in fig. 3a, the communication architecture may include: macro base station, micro base station and tag. The micro base station may communicate directly with the tag, while the macro base station needs to communicate indirectly with the tag through the micro base station. The label can send the uplink data to the micro base station, and then the micro base station transmits the uplink data to the macro base station; the macro base station may send downlink data to the femto base station, and the femto base station sends the downlink data to the tag.

Fig. 3b is a schematic diagram of another communication architecture according to an embodiment of the present application. As shown in fig. 3b, the communication architecture may include macro base stations, micro base stations, tags, and auxiliary terminals. The femto base station and the assisting terminal can directly communicate with the tag, and the macro base station needs to indirectly communicate with the tag through the femto base station and/or the assisting terminal. The tag sends uplink data to the micro base station, and the micro base station can directly transmit the uplink data to the macro base station, or the micro base station transmits the uplink data to the macro base station through the assistance terminal. The macro base station may send downlink data to the micro base station or the assisting terminal, and the micro base station transmits the downlink data to the tag through the assisting terminal.

It should be noted that, in the embodiments of the present application, the macro base station and the micro base station may be described as a network device, specifically, the macro base station may include a node B (gNB) that continues to evolve, and the micro base station may include a station. The network device may include, in addition to a macro base station or a micro base station in the embodiment of the present application, a reader, a transceiver point (transmission receive point, TRP), a transmission point (transmission point, TP), a transmission reception point (transmission reception point, TRP), an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), and a relay. In the embodiment of the application, the device for realizing the function of the network equipment can be the network equipment, or can be a device which can support the network equipment to realize the function, such as a chip system, and the device can be installed in the network equipment for matching use.

It should be noted that, the tag in the embodiment of the present application may include an active tag, a semi-active tag, and a passive tag. In the embodiment of the application, the device for realizing the function of the network equipment can be a label, or can be a device which can support the network equipment to realize the function, such as a chip system, and the device can be installed in the label for matching use.

In particular implementations, each device included in the communication architecture described above may employ the constituent structure shown in fig. 4 or include the components shown in fig. 4. Fig. 4 is a schematic structural diagram of a communication device 400 according to an embodiment of the present application, where the communication device 400 has the function of the tag according to the embodiment of the present application, the communication device 400 may be a tag or a chip or a system on a chip in the tag. When the communication apparatus 400 has the function of the network device according to the embodiment of the present application, the communication apparatus 400 may be a network device or a chip or a system on a chip in the network device.

As shown in fig. 4, the communication device 400 may include a processor 401, a communication line 402, and a communication interface 403. Further, the communication device 400 may also include a memory 404. The processor 401, the memory 404, and the communication interface 403 may be connected by a communication line 402.

The processor 401 may be a central processing unit (central processing unit, CPU), a general purpose processor network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a microprocessor, a microcontroller, a programmable logic device (programmable logic device, PLD), or any combination thereof. The processor 401 may also be other means having a processing function, such as a circuit, a device, a software module, or the like. The MAC layer and the PHY layer may be controlled by running a computer program or software code or instructions therein or by calling the computer program or software code or instructions stored in the memory 404 to implement the method for transmitting signals provided by the embodiments of the present application described below.

Communication line 402 for transmitting information between the components included in communication device 400.

A communication interface 403 for communicating with other devices or other communication networks. The other communication network may be an ethernet, a radio access network (radio access network, RAN), a wireless local area network (wireless local area networks, WLAN), etc. The communication interface 403 may be a radio frequency module, transceiver, or any device capable of enabling communication.

Memory 404 for storing instructions. Wherein the instructions may be computer programs.

The memory 404 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and/or instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device capable of storing information and/or instructions, an EEPROM, a compact disk (compact disc read-only memory, CD-ROM) or other optical disk storage, magnetic disk storage medium or other magnetic storage device, including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.

It should be noted that, the memory 404 may exist separately from the processor 401 or may be integrated with the processor 401. Memory 404 may be used to store instructions or program code or some data, etc. The memory 404 may be located within the communication device 400 or may be located outside the communication device 400, without limitation. The processor 401 is configured to execute instructions stored in the memory 404 to implement a signal transmission method according to the following embodiments of the present application.

In one example, processor 401 may include one or more CPUs, such as CPU0 and CPU1 in fig. 4. As an exemplary implementation, communication device 400 includes multiple processors, e.g., processor 405 in addition to processor 401 in fig. 4.

It should be noted that the constituent structure shown in fig. 4 does not constitute a limitation of the communication apparatus, and the communication apparatus may include more or less components than those shown in fig. 4, or may combine some components, or may be arranged in different components.

The signal transmission method provided by the embodiment of the present application is described below with reference to the communication architecture shown in fig. 3a or fig. 3 b. Wherein each of the devices in the embodiments described below may have the components shown in fig. 4. In which the terms and the like related to the actions of the embodiments of the present application are mutually referred to, without limitation. The message names of interactions between the devices or parameter names in the messages in the embodiment of the present application are just an example, and other names may be used in specific implementation without limitation.

Fig. 5 is a flowchart of a signal transmission method according to an embodiment of the present application.

S501, the tag determines an index of a first sequence in the first set according to the first information, and determines the first sequence according to the index of the first sequence.

The label may be the label shown in fig. 3a or fig. 3b, and the label may adopt the composition structure shown in fig. 4 or include the components shown in fig. 4.

The first set may include a plurality of spreading sequences that are orthogonal to each other, where the mutual orthogonality may refer to a cross-correlation function of any two spreading sequences in the set being 0, i.e., any two spreading sequences in the first set are completely uncorrelated. For simplicity, the spreading sequences may alternatively be described as sequences in embodiments of the present application. All sequences in the first set may be numbered sequentially, where the number of each sequence in the first set may be used as an index corresponding to each sequence, and the corresponding sequence in the first set may be determined according to the index of the sequence. For example, the first sequence includes X sequences, which are numbered as sequence 0, sequence 1, sequence 2, … …, sequence X-1, and the corresponding sequence 1 can be determined according to index 1. The first set may be preconfigured to the tag by the network device or may be generated by the tag itself, each sequence in the first set may include one or more binary bits, and the sequence length of each sequence may be used to represent a spreading multiple of the sequence when it is spread.

Alternatively, a sequence in the first set may correspond to one or more tags, i.e. the sequence may be for one or more tags. It should be noted that, when a sequence corresponds to a plurality of tags, the plurality of tags may transmit signals processed by the sequence on a plurality of different time slots. For example, the number of sequences in the first set is n, the number of tags is m, where n < m, there are 3 tags selected to the same sequence, in order to avoid that the signals on the tag reflection link of the tags selected to the same sequence are superimposed to form interference, the 3 signals processed by the same sequence may be distributed in different time slots for transmission, such as the signal of tag 1 is transmitted in time slot 1, the signal of tag 2 is transmitted in time slot 2, and the signal of tag 3 is transmitted in time slot 3.

Alternatively, the first set may be divided into a plurality of subsets, which do not intersect each other, and the number of sequences in each subset may be the same or different. The second set is a subset of the first set, and the second set may be a subset with the strongest orthogonality among the subsets of the first set. For example, the first set may include 8 sequences: { sequence 0, sequence 1, sequence 2, sequence 3, sequence 4, sequence 5, sequence 6, sequence 7}, the subset of the first set may be divided into 4 subsets, including subset 1{ sequence 0, sequence 1}, subset 2{ sequence 2, sequence 3}, subset 3{ sequence 4, sequence 5}, subset 4{ sequence 6, sequence 7}, and the tag may determine the first sequence from any one of subset 1 through subset 4.

Alternatively, the sequences in the first set may be generated from the sequences in the third set. The third set includes a plurality of mutually orthogonal sequences, the length of the sequences in the third set is smaller than that of the sequences in the first set, and the sequences in the third set are base sequences of the sequences in the first set, that is, the sequences in the first set may be generated by the sequences in the third set, and the specific generation process may refer to the sequence generation process in the following manner III.

Wherein the first sequence is a sequence of tags for processing reflected information bits, the first sequence may include one or more binary bits, and a sequence length of the first sequence may be used to represent a spreading factor when performing a spreading process according to the first sequence.

For example, the tag may determine an index of the first sequence in the first set based on the first information.

The first information comprises one or more of identification information of the tag and pseudo random number information generated by the tag. Specifically, the identification information of the tag may be a tag identifier (tag identification, TID) unique to the tag itself, and TIDs of different tags are different from each other, for example, TID of tag 1 is 0010 0101 0111 0101 1111 1010 0101 1011, and TID of tag 2 is 1010 0101 0100 1110 0101 1111 0101 1010. The pseudo random number information generated by the tag may be a 16-bit random number or a pseudo random number RN16 generated by the tag, and the RNs 16 generated by different tags are different from each other, for example, the RN16 generated by the tag 1 is 1100 1011 0111 1010, and the RN16 generated by the tag 2 is 1110 0101 0101 0100. The pseudo random number information generated by the tag may also be another set of x-bit random numbers or pseudo random numbers RNx generated by the tag, and RNx generated by different tags are different from each other, for example, RN8 generated by tag 1 is 0111 1110, and RN8 generated by tag 2 is 1001 0101.

Wherein the first value is the maximum number of sequences in the first set for tag selection; alternatively, the first value is the maximum number of sequences in the second set for tag selection. The first value may be indicated by the network device, and in particular, the tag may receive indication information from the network device, which may indicate the first value.

Specifically, the indication information sent by the network device to the tag may be carried in a signaling sent by the network device to the tag, where the signaling may be used for identifying or inventory the tag by the network device, and the signaling may include a select signaling and a query signaling. The tag received select signaling may select a particular tag or group of tags for the inventory and access process for which the tag received query signaling may initiate inventory flow.

Parameters in select signaling may include, among other things, target, action, memory, pointer, length, mask, truncate, and CRC-16. The number of bits and the specific meaning of the individual parameters in the select signaling can be as shown in table 1.

TABLE 1 parameters for select Signaling

Specifically, the tag may directly receive the signaling sent by the network device, or receive the signaling sent by the network device through the assisting terminal. The network device may add log to the signaling to be sent ₂ N]The bit indicates the first value N as indication information which may be carried in a redundant status field of the signaling, e.g. the network device may add indication information in a reserved part of the target parameter field in the select signaling.

For example, the network device may carry 3 bits in the signaling to be sent as indication information to indicate that the first value is 8, i.e. that the first set includes 8 tag-selectable sequences. For another example, the network device may carry 2 bits in the signaling to be sent as indication information to indicate that the first value is 4, i.e. the second set includes 4 tag-selectable sequences.

Optionally, the tag may also receive packet indication information from the network device, the packet indication information being usable to indicate the number of subsets divided by the first set. The packet indication information may be carried in signaling received by the tag for transmission, and the specific indication mode may refer to the indication mode of the indication information. For example, the first set includes 64 sequences with sequence numbers #0 to #63 in sequence, the network device carries 2 bits as packet indication information in signaling to be sent to the tag to indicate that the first set may be divided into 2 subsets, subset 0 includes #0 to #31 sequences, and subset 1 includes #32 to #63 sequences.

In particular, the embodiments of the present application provide the following ways to determine the index of the first sequence in the first set.

For example, the tag may perform a first operation on the first value according to the first information, and determine the index of the first sequence in the first set according to the operation result, and a specific implementation process may refer to the following manner one.

For example, the tag may perform a first operation on the first value according to the first information, and determine the index of the first sequence in the second set according to the operation result, and the specific implementation process may refer to the following second mode.

For example, the tag performs a first operation on the second value according to the first information, determines an index of the second sequence in the third set according to the operation result, and determines an index of the first sequence according to the index of the second sequence and the second information. The specific implementation process can refer to the following third mode.

Further, the tag may determine the first sequence from an index of the first sequence.

S502, the tag performs spread spectrum processing on the reflected information bits according to the first sequence.

The reflected information bits may include, among other things, RN16 generated by the tag, or tag related information, such as PC, EPC and CRC-16 of the tag.

For example, the tag may map the reflected information bits to time domain or frequency domain, and then multiply the reflected information bits with the first sequence to obtain processed information. For example, the tag 1 takes the sequence 4 in the first set as a first sequence, maps information bits or information blocks to be sent to the network device by the tag 1 on a time domain or a frequency domain, multiplies the information bits or the information blocks by the sequence 4, and further obtains a signal transmitted on a tag reflection link after spread spectrum processing.

S503, the tag sends the processed information to the network equipment.

The network device may be a macro base station or a micro base station in the communication architecture shown in fig. 3a or fig. 3 b.

Specifically, the tag may reflect information to the network device in a spread-spectrum + repetition manner. The tag repeatedly transmits the processed signals to the network equipment, so that the network equipment can combine and despread the received signals, and further the error rate of transmission can be effectively reduced.

For example, in the tag reflection link, a fixed multiple factor is preset to n ₀ The tag repeatedly transmits n identical information bits or information blocks ₀ And twice. For a single tag, network device n ₀ When the same information sent by the tag is received, the method can be used for n ₀ And combining and receiving repeated information bits or information blocks. If in a time slot, when multiple tags enter a response state at the same time, each tag repeatedly transmits n ₀ And multiplying the information bits or the information blocks to be reflected by the first sequence corresponding to the tag on the basis of the next same information.

S504, the network equipment receives the information after the label processing and despreads the information.

The network equipment receives the processed signals and performs combination and despreading to obtain the reflected signals of the tags.

Specifically, the network device may despread the received signal after tag processing according to the first sequence. Optionally, the network device may poll the sequences in the first set and perform correlation detection until the first sequence is found to be capable of successfully despreading the signal received by the network device.

For example, the first set includes 8 sequences: { sequence 0, sequence 1, sequence 2, sequence 3, sequence 4, sequence 5, sequence 6, sequence 7}, wherein the first sequence selected by the tag 1 is sequence 4, the tag 1 processes the reflected signal according to the sequence 4 and sends the signal to the network device, the network device polls the sequence in the first set after receiving the signal reflected by the tag 1, the received signal cannot be successfully despread by using the sequence 0, the sequence 1, the sequence 2 and the sequence 3 in sequence, the received signal can be successfully despread by using the sequence 4 and the reflected signal of the tag 1 is obtained, and the network device stops polling the first set after the successful despreading.

Optionally, the network device may synchronize the first sequence selected by the tag, and after receiving the signal sent by the tag, the network device directly uses the first sequence synchronized by the tag to despread. For example, the first set includes 8 sequences: { sequence 0, sequence 1, sequence 2, sequence 3, sequence 4, sequence 5, sequence 6, sequence 7}, wherein the first sequence selected by the tag 1 is sequence 4, the tag 1 processes the reflected signal according to the sequence 4 and then sends the processed signal to the network device, and synchronizes the sequence 4 to the network device, and the network device despreads the received signal according to the sequence 4 to obtain the reflected signal of the tag 1.

Further, the network device may respond to or access the tag after obtaining the reflected signal of the tag. For example, after the network device successfully receives the RN16 responded by the tag 1, an ACK containing the same RN16 may be responded to the tag 1 for acknowledging the tag 1. For another example, the network device obtains the tag related information of the tag 1 through signal despreading and then accesses the tag into the ethernet.

For example, when the method shown in fig. 5 is used to illustrate an example between one tag and a network device, it can be understood that, for other tags, the method shown in fig. 5 may be used to communicate with the network device, for example, when the tag 1, the tag 2, the tag 3, and the tag 4 enter a response state in the same time slot, the tag 1, the tag 2, the tag 3, and the tag 4 may determine the index of the first sequence in the first set by the respective first information of the tags, and perform spread spectrum processing on the reflected information bits of different tags according to the first sequence corresponding to the tag, so that the signals sent by the tag 1, the tag 2, the tag 3, and the tag 4 to the network device may not interfere with each other.

Based on the method shown in fig. 5, each tag may determine an index of a first sequence in the first set according to the first information, and determine a corresponding first sequence according to the index. Because the first information of different labels is different from each other, the probability of selecting the same first sequence by the labels can be reduced, spread spectrum signals responded by a plurality of labels to network equipment are not interfered with each other, and finally the label access efficiency can be effectively improved.

In the method shown in fig. 5, a first mode, a second mode, and a third mode related to the selection of the first sequence by the tag are described below:

mode one: the tag performs a first operation on the first numerical value according to the first information, and determines an index of the first sequence in the first set according to an operation result.

Wherein the first information includes one or more of identification information of the tag, tag generated pseudo random number information, for example, the first information may include one or more of TID of the tag, RN16 of tag generation, and another set RNx of tag generation. The first value may be indicated by indication information sent by the network device, and the first value may be a number of sequences in the first set. The first information of different tags is different from each other, so that the first sequence selected when a plurality of tags respond to the network device in the same time slot can be guaranteed to be different with high probability.

The performing, by the tag, the first operation on the first value according to the first information may include performing, by the tag, a modulo operation on the first value according to the first information.

For example, the tag may perform a modulo operation on the first value according to tag identification information in the first information, and/or perform a modulo operation on the first value according to pseudo random number information generated by the tag in the first tag, and determine an index of the first sequence in the first set according to a result of the modulo operation.

Specifically, when the first information includes any one of TID, RN16, RNx content of the tag, the tag may perform a modulo operation on the first value according to one content of the first information, obtain an index of the first sequence in the first set according to a result of the modulo operation, and use a sequence corresponding to the index in the first set as the first sequence.

Taking a tag as tag 1, the first information includes any one of TID of tag 1, RN16 generated by tag 1, and another group RNx generated by tag 1 as an example, and a process of performing a modulo operation on a first value according to the first information and selecting a first sequence according to a result of the modulo operation will be described below.

Taking the TID that the first information only includes the tag 1 as an example, it is assumed that the first value obtained by the indication information sent by the network device by the tag 1 is N, that is, the first set includes N optional sequences of the tag 1. When tag 1 receives the query signaling and then starts the inventory process, tag 1 can obtain index ss_seq according to TID and first value N by following formula (1) _index TID, AND index SS_Seq in the first set _index The sequence corresponding to the_tid is the first sequence of tag 1.

It should be noted that, the symbol "mod" related to the formula in the embodiment of the present application indicates a modulo operation, for example, "a mod B" indicates that a performs a modulo operation on B.

For example, the TID of tag 1 is 0010 0101 0111 0101 1111 1010 0101 1011, and the indication information sent by the network device indicates that the first value is 8, and the binary representation is 1000, that is, the first set includes 8 optional sequences of tag 1, and the index ss_seq is calculated according to the above formula (1) _index TID is 3, and sequence 3 corresponding to index 3 in the first set is taken as the first sequence of tag 1.

Taking the example that the first information only includes RN16 generated by tag 1, it is assumed that the first value obtained by tag 1 through the indication information is N, that is, the first set includes N optional sequences of tag 1. When tag 1 receives the query signaling and then starts the inventory procedure, tag 1 can obtain index ss_seq according to RN16 and first value N by following formula (2) _index RN16 compares the first set with the index SS_Seq _index The corresponding sequence of_RN16 is the first sequence of tag 1.

SS_Seq _index RN16 = RN16 mod N formula (2)

For example, RN16 generated by tag 1 and to be responded to the network device is 1100 1011 0111 1010, the indication information sent by the network device indicates that the first value is 8, and the binary representation is 1000, that is, the first set includes 8 optional sequences of tag 1, and the index ss_seq is calculated according to the above formula (2) _index RN16 is 2, and sequence 2 corresponding to index 2 in the first set is the first sequence of tag 1.

Taking another group RNx in which the first information only includes tags 1 as an example, it is assumed that the tags 1 obtain a first value of N by indicating information, i.e. an optional sequence of N tags 1 in the first set. When tag 1 receives the query signaling and then starts the inventory process, tag 1 can obtain the index ss_seq according to RNx and the first value N by the following formula (3) _index RNx and index ss_seq in the first set _index RNx as the first sequence of tag 1.

SS_Seq _index RNx = RNx mod N formula (3)

For example, RN8 generated by tag 1 and to be responded to the network device is 0111 1110, the indication information sent by the network device indicates that the first value is 8, and the binary representation is 1000, that is, the first set includes 8 optional sequences of tag 1, and the index is calculated according to the above formula (3)For 6, the sequence 6 corresponding to index 6 in the first set is the first sequence of tag 1.

Specifically, when the first information includes multiple items of content in TID, RN16 and RNx of the tag, the tag may perform a modulo operation on the first numerical value according to a result of traversing each item of content in the first information, obtain multiple indexes according to a result of the modulo operation, select one of the multiple indexes as an index of the first sequence, and use a sequence corresponding to the index in the first set as the first sequence.

Taking the tag as tag 1, the first information includes TID of tag 1, RN16 generated by tag 1, and a plurality of items in another group RNx generated by tag 1 as examples, and a process of performing a modulo operation on the first value by tag 1 according to the first information and selecting the first sequence according to the result of the modulo operation will be described.

Taking the example that the first information includes TID of tag 1, RN16 generated by tag 1, and another group RNx generated by tag 1, it is assumed that the first value obtained by the tag 1 through the indication information is N, that is, the first set includes N optional sequences of tag 1. And when the tag 1 receives the query signaling, starting the inventory process, traversing three items of content included in the first information by the tag 1, and performing modulo operation on the first numerical value N according to the traversing result.

For example, tag 1 can obtain index ss_seq through equation (1) above _index TID, the index SS_Seq is obtained by the above equation (2) _index RN16 obtains an index SS_Seq by the above equation (3) _index RNx, tag 1 may be from the index set { SS_seq } _index _TID，SS_Seq _index _RN16，SS_Seq _index RNx, randomly selecting an index as the index of the first sequence, and taking the sequence corresponding to the index in the first set as the first sequence of the tag 1.

Taking the example that the first information includes TID of tag 1 and RN16 generated by tag 1, it is assumed that the first value obtained by tag 1 through the first indication information is N, that is, the first set includes N optional sequences of tag 1. And starting the inventory flow after the tag 1 receives the query signaling, traversing a plurality of items of content included in the first information by the tag 1, and performing modulo operation on the first numerical value N according to the traversing result. For example, tag 1 can obtain the sequence ss_seq by equation (1) above _index TID, the sequence SS_Seq is obtained by the above equation (2) _index RN16, tag 1 may be from index set { ss_seq } _index _TID，SS_Seq _index And (2) randomly selecting an index from the_RN16 } as an index of the first sequence, and taking a sequence corresponding to the index in the first set as a first sequence of the tag 1.

For example, when the first information includes identification information of the tag and pseudo random number information generated by the tag, the tag performing the first operation according to the first information and the first value may further include: the label carries out modulo operation on the first numerical value according to the identification information to obtain a first result, carries out modulo operation on the first numerical value according to the pseudo-random number information to obtain a second result, carries out summation operation on the first result and the second result to obtain a third result, carries out modulo operation on the first numerical value according to the third result, and determines the index of the first sequence in the first set according to the operation result.

Taking the example that the first information includes TID of tag 1 and RNx generated by tag 1, it is assumed that the first value obtained by the indication information sent by the network device by tag 1 is N, that is, the first set includes N optional sequences of tag 1. When tag 1 receives the query signaling and then starts the inventory process, tag 1 can obtain index ss_seq according to TID, RNx and first value N by the following formula (4) _index Combine, AND index SS_Seq in the first set _index The sequence corresponding to_combine is used as the first sequence of tag 1.

SS_Seq _index Combine= (TID mod n+rnx mod N) mod N formula (4)

Illustratively, the first computing of the first value by the tag according to the first information further comprises: the label carries out modular operation on the first numerical value according to the first information, then adds a scrambling code to carry out operation, and determines the index of the first sequence in the first set according to the operation result.

For example, tag 1 may perform modulo operation on the first value according to the TID of tag 1, and then add the scrambling code to determine the index of the first sequence in the first setIndex AND in first setThe corresponding sequence as the first sequence of tag 1, the first calculation may include the calculation process of the following formula (5).

Wherein in the formula (5), S is a scrambling code, and the indexThe value range of (C) is [0, N-1 ]]。

Optionally, when the first information includes one or more of identification information of the tag and pseudo random number information generated by the tag, a process of determining, by the tag, an index of the first sequence in the first set according to the modulus and the scrambling code may refer to the above process, which is not repeated.

The method is suitable for carrying out first operation on the first numerical value by one tag according to the first information, determining the index of the first sequence in the first set according to the operation result, and also suitable for carrying out first operation on the first numerical value according to the first information when a plurality of tags respond to network equipment in the same time slot, and determining the index of the first sequence in the first set according to the operation result. For example, the labels 1, 2, 3, and 4 respond to the network device in the same time slot, and the process of selecting the first sequence by the labels 2, 3, and 4 may refer to the label 1, and the probability of selecting the same first sequence by the labels 1, 2, 3, and 4 is low.

Mode two: the tag may perform a first operation on the first value according to the first information, and determine an index of the first sequence in the second set according to an operation result.

Wherein the first information includes one or more of identification information of the tag, pseudo random number information generated by the tag, for example, the first information may include one or more of TID of the tag, RN16 generated by the tag, another group RNx generated by the tag. The first value may be indicated by indication information sent by the network device, and the first value may be the number of sequences in the second set.

Wherein the second set may be one of a plurality of subsets divided by the first set. The number of the plurality of subsets divided by the first set is a third value, which may be indicated by packet indication information sent by the network device. The plurality of subsets may be numbered sequentially, e.g., subset 0, subset 1, subset 2. The tag may perform a first operation on the first information and the third value, obtain a subset index according to an operation result, and use a subset corresponding to the subset index included in the subsets divided by the first set as the second set. The first information of different tags is different, so that the different subsets selected by the plurality of tags can be ensured, the first sequence is selected from the different subsets, and the probability of selecting the same first sequence when the plurality of tags respond to the network device in the same time slot can be further reduced.

The performing, by the tag, the second operation on the first information and the third value may include performing, by the tag, a modulo operation on the third value according to the first information.

Specifically, when the first information includes any one of TID, RN16, RNx contents of the tag, the tag may perform a modulo operation on the first value according to one of the contents of the first information, obtain a subset index according to an operation result, and use a subset corresponding to the subset index included in the subsets divided by the first set as the second set, and the tag may determine the first sequence from the second set.

Taking the tag as tag 1, the first information includes any one of TID of tag 1, RN16 generated by tag 1, and another group RNx generated by tag 1 as an example, and a process of performing a modulo operation on the third value by tag 1 according to the first information and selecting the second set according to the result of the modulo operation will be described below.

Taking the TID that the first information only includes the tag 1 as an example, assume that the third value obtained by grouping the indication information by the tag 1 is M, that is, the first set includes M divided subsets, and is numbered as subset 0, subset 1, … …, and subset M-1 in sequence. When tag 1 receives the query signaling and then starts the inventory process, tag 1 can obtain a subset index ss_aggre according to TID and a third value M by the following formula (6) _index TID to be assembled from first setSub-set index of SS_Aggre in multiple sub-sets divided _index The subset of_tid is the second set.

SS_Aggre _index Tid=tid mod M formula (6)

For example, TID of tag 1 is 0010 0101 0111 0101 1111 1010 0101 1011, the packet indication information sent by the network device indicates that the third value is 4, and the binary representation is 100, that is, the first set may be divided into 4 subsets, and may be numbered as subset 0, subset 1, subset 2, and subset 3 in sequence, and the subset index ss_aggre is calculated according to the above formula (6) _index The_tid is 3, and subset 3 of the four subsets divided by the first set is taken as the second set.

Optionally, the first information may include the RN16 generated by the tag 1 or the first information may include another group RNx generated by the tag 1, and the process of selecting the second set according to any one of the first information may refer to the process of selecting the second set according to the TID of the tag 1, which is not described herein.

Specifically, when the first information includes multiple items of content in TID, RN16, RNx of the tag, the tag may perform modulo operation on the second value according to a result of each item of content traversal in the first information, and obtain a subset index set according to a result of the modulo operation, where the subset index set may be: { SS_Aggre _index _TID，SS_Aggre _index _RN16，SS_Aggre _index RNx, the tag may randomly select one subset index from the subset index sets as the second set, and the subset corresponding to the subset index from the subset divided by the first set is used as the second set.

Further, the tag may perform a first operation on the first value according to the first information, and determine an index of the first sequence in the second set according to an operation result. Specifically, the implementation process of determining the index of the first sequence in the first set according to the operation result by referring to the label in the first mode is omitted.

The tag determines the index of the first sequence in the second set according to the second mode, processes the reflected information bit according to the index of the first sequence in the second set, sends the processed signal to the network device, and after receiving the signal processed by the tag, the network device polls the sequence in the second set, carries out correlation detection and despreads the received signal. Compared with the method for detecting the correlation of all sequence polls in the first set, the method for detecting the sequence polls in the subset of the first set only has the advantages that the sequence range of the polls in despreading of network equipment is reduced, and the complexity of despreading can be effectively reduced.

Mode three: the label carries out first operation on the second value according to the first information, determines the index of the second sequence in the third set according to the operation result, and determines the index of the first sequence according to the index of the second sequence and the second information.

Wherein the second information comprises one or more of identification information of the tag, pseudo random number information generated by the tag, e.g. the second information comprises one or more of TID of the tag, RN16 generated by the tag, another set RNx generated by the tag. The second value may be indicated by indication information sent by the network device, and the second value may be the number of sequences in the third set.

Wherein the third set comprises a plurality of mutually orthogonal sequences, which may be numbered sequentially, e.g., sequence 0, sequence 1, sequence 2, sequence 3. The length of the sequences in the third set is smaller than the length of the sequences in the first set, and the sequences in the third set are base sequences of the sequences in the first set, i.e. the sequences in the first set may be generated from the sequences in the third set.

Fig. 6 is a schematic diagram of a generation sequence according to an embodiment of the present application. Wherein the root code C _0,0 ＝(1)，C _0,0 Two length-2 spreading sequences can be generated: c (C) _0,0 The next step is 1 to obtain C _1,0 ＝(1,1)，C _0,0 The next step is to obtain C when 0 _1,1 ＝(1,-1)。C _1,0 And C _1,1 Four length-4 spreading sequences can be generated: c (C) _1,0 The next step is 1 to obtain C _2,0 ＝(1,1,1,1)，C _1,0 The next step is 0 to obtainC _2,1 ＝(1,1,-1,-1)，C _1,1 The next step is 1 to obtain C _2,2 ＝(1,-1,1,-1)，C _1,1 The next step is 1 to obtain C _2,3 = (1, -1, 1). Wherein the third set may comprise { C _2,0 ，C _2,1 ，C _2,2 ，C _2,3 The sequences in the third set may generate eight length-8 spreading sequences, which may form the first set { C }, the _3,0 ，C _3,1 ，C _3,2 ，C _3,3 ，C _3,4 ，C _3,5 ，C _3,6 ，C _3,7 }。

Specifically, the tag performs the first operation on the second value according to the first information, and the process of determining the index of the second sequence in the third set according to the operation result may refer to the process of determining the index of the first sequence in the first mode or the second mode, which is not described in detail.

Further, the tag may determine the index of the first sequence based on the index of the second sequence and the second information.

Specifically, the tag may determine whether the second sequence is 0 or 1 in the next step according to one or more bits of the second information, thereby determining the index of the first sequence.

The description will be given taking as an example a TID in which the second information includes only a tag. For example, the tag may determine whether the second sequence is next 0 or 1 based on the first bit of tag TID, and tag 1 has a TID first bit of 0, and the second sequence is next 0. Tag 2 has a TID first of 1 and the second sequence next is 1.

For another example, the tag may determine whether the next step is 0 or 1 based on the last two bits of the tag TID, where the last two bits of the tag TID are 00 or 11, then the second sequence next step is determined to be 1, and the last two bits of the tag TID are 10 or 01, then the second sequence next step is determined to be 0. When the second information includes the RN16 generated by the tag or another group RNx generated by the tag, the process of determining the next sequence generation condition of the second sequence by the tag may refer to the above process, and will not be described in detail.

Alternatively, the tag may determine whether the next step of the second sequence is 0 or 1 based on the second information in which one or more bits of the plurality of items are together.

Taking the second information including TID and RN16 as an example, for example, the TID first bit of tag 1 is 1, the RN16 last bit of tag 1 is 0, and then determining that the second sequence of tag 1 is 1 in the next step; if the TID first bit of tag 2 is 0 and the RN16 last bit of tag 2 is 1, then the next step in the second sequence of tag 2 is determined to be 0.

For example, the tag may determine an index of the first sequence generated next to the second sequence according to the second information.

The following describes a procedure in which the tag 1 determines the index of the first sequence based on the index of the second sequence and the second information, with the tag 1.

For example, the tag 1 determines, through signaling sent by the network device, that the length of the first sequence selected by the tag 1 is 8. The TID of tag 1 is 0010 0101 0111 0101 1111 1010 0101 1011 and the indication information sent by the network device indicates that the second value is 4 and the binary representation is 100, i.e. the third set comprises 4 alternative sequences of tag 1. Calculating an index ss_seq of the second sequence according to the above formula (1) _index TID is 3, sequence 2 included in the third set is the second sequence of tag 1, and sequence 3 may be C in FIG. 6 _2,3 = (1, -1, 1). According to the TID head of the tag 1 being 0, determining the next step of the second sequence to be 0, obtaining an index of the first sequence with the length of 8 after the next step, and determining the first sequence to be C in fig. 6 according to the index _3,6 ＝(1,-1,-1,1，1,-1,-1,1)。

The tag obtains the first sequence according to the third method, so that the probability that a plurality of tag tags select the same first sequence in the same time slot can be further reduced, and the tag identification efficiency of the actual network equipment is effectively improved.

The embodiment of the application can divide the functional modules of the slave tag or the network device according to the method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Fig. 7 shows a block diagram of a communication device 700, which communication device 700 may be a tag, which communication device 700 may be adapted to perform the functions of the tag as referred to in the above embodiments. As one implementation, the communication apparatus 700 shown in fig. 7 includes: a receiving unit 701, a processing unit 702, and a transmitting unit 703.

A receiving unit 701, configured to receive indication information from a network device, where the indication information indicates a first value; alternatively, the indication information indicates the second value. Wherein the first value is the maximum number of sequences in the first set for selection by the processing unit 702; alternatively, the first value is the maximum number of sequences for selection by the processing unit 702 in a second set, the second set being a subset of the first set.

Optionally, the receiving unit 701 may be further configured to receive packet indication information from a network device.

The processing unit 702 may be configured to perform a first operation on the first numerical value according to the first information by using the processing unit 702, and determine an index of the first sequence in the first set according to an operation result. Wherein the processing unit 702 performs a first operation on the first value according to the first information, including: the processing unit 702 performs a modulo operation on the first value according to the first information.

Optionally, the processing unit 702 may be further configured to perform a first operation on the second value by using the processing unit 702 according to the first information, and determine an index of the second sequence in the third set according to an operation result; wherein the second value is the number of sequences in the third set; the processing unit 702 determines an index of the first sequence from the index of the second sequence and the second information. Wherein the second information includes one or more of identification information of the processing unit 702, pseudo random number information generated by the processing unit 702.

Optionally, the processing unit 702 may be further configured to perform spread spectrum processing on the reflected information bits according to a first sequence corresponding to the index of the first sequence.

A transmitting unit 703, configured to transmit the information processed by the processing unit 702.

Wherein the processing unit may be a processor or a controller. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with this disclosure. A processor may also be a combination that performs computing functions, e.g., including one or more microprocessors, a combination of a DSP and a microprocessor, and so forth.

Specifically, all relevant contents of each step related to the embodiment of the present application may be cited in the functional description of the corresponding functional module, which is not described herein. The communication device 700 is used to perform functions in the signal transmission method shown in the method of fig. 5, and thus the same effects as the above-described signal transmission method can be achieved.

The embodiment of the application also provides a computer readable storage medium. All or part of the flow in the above method embodiments may be implemented by a computer program to instruct related hardware, where the program may be stored in the above computer readable storage medium, and when the program is executed, the program may include the flow in the above method embodiments. The computer readable storage medium may be a terminal of any of the foregoing embodiments, such as: the internal storage unit comprises a data transmitting end and/or a data receiving end, such as a hard disk or a memory of the terminal. The computer readable storage medium may be an external storage device of the terminal, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash card (flash card), or the like, which are provided in the terminal. Further, the computer-readable storage medium may further include both an internal storage unit and an external storage device of the terminal. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.

Embodiments of the present application also provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of transmitting signals described in any of the embodiments of the present application.

The embodiment of the present application further provides a communication system, where a structure diagram of the communication system is shown in fig. 8, and the communication system 800 may include: the tag, the network device, the tag and the network device may be connected over an air interface.

The tag may perform the tag function related to the embodiment of the present application, and the network device may perform the network device function related to the embodiment of the present application.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.

The modules in the device of the embodiment of the application can be combined, divided and deleted according to actual needs.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

A method of transmitting signals, the method comprising:

the tag determines an index of a first sequence in the first set according to the first information; wherein the first information comprises one or more of identification information of the tag and pseudo random number information generated by the tag, and the first set comprises a plurality of mutually orthogonal sequences;

the tag performs spread spectrum processing on the reflected information bits according to a first sequence corresponding to the index of the first sequence;

The tag sends the processed information to the network device.
The method of claim 1, wherein the tag determining the index of the first sequence in the first set based on the first information comprises:

the tag carries out first operation on the first numerical value according to the first information, and determines the index of the first sequence in the first set according to an operation result; wherein the first value is a maximum number of sequences in the first set for the tag selection; alternatively, the first value is the maximum number of sequences for the tag selection in a second set, the second set being a subset of the first set.
The method of claim 2, wherein the tag performs a first operation on a first value based on the first information, comprising:

and the tag carries out modular operation on the first numerical value according to the first information.
The method of claim 1, wherein the tag determining the index of the first sequence in the first set based on the first information comprises:

the label carries out first operation on the second numerical value according to the first information, and determines the index of the second sequence in the third set according to the operation result; wherein the second value is the number of sequences in the third set;

The tag determines the index of the first sequence according to the index of the second sequence and second information, wherein the second information comprises one or more of identification information of the tag and pseudo-random number information generated by the tag.
The method of claim 4, wherein the step of,

the third set includes a plurality of mutually orthogonal sequences, the length of the sequences in the third set is smaller than the length of the sequences in the first set, and the sequences in the third set are base sequences of the sequences in the first set.
The method according to any one of claim 2 to 4, wherein,

the tag receives indication information from the network device, wherein the indication information indicates the first numerical value; alternatively, the indication information indicates the second value.
A method of transmitting signals, the method comprising:

the network equipment receives information after label processing, wherein the information after label processing is obtained by performing spread spectrum processing on reflected information bits by the label according to a first sequence corresponding to an index of the first sequence in a first set;

the index of the first sequence is determined by the tag according to first information; wherein the first information comprises one or more of identification information of the tag and pseudo random number information generated by the tag, and the first set comprises a plurality of mutually orthogonal sequences;

And the network equipment performs despreading processing on the information processed by the tag to obtain reflected information bits of the tag.
The method of claim 7, wherein the index of the first sequence is determined by the tag from first information, comprising:

the index of the first sequence is determined by an operation result of the tag performing a first operation on a first numerical value according to the first information; wherein the first value is a maximum number of sequences in the first set for the tag selection; alternatively, the first value is the maximum number of sequences for the tag selection in a second set, the second set being a subset of the first set.
The method of claim 8, wherein the tag performing a first operation on a first value based on the first information comprises:

and the tag carries out modular operation on the first numerical value according to the first information.
The method of claim 7, wherein the index of the first sequence is determined by the tag from first information, comprising:

the index of the second sequence in the third set is determined by the operation result of the first operation of the tag on the second value according to the first information; wherein the second value is the number of sequences in the third set;

The index of the first sequence is determined by the tag according to the index of the second sequence and second information; wherein the second information includes one or more of identification information of the tag and pseudo random number information generated by the tag.
The method of claim 10, wherein the step of providing the first layer comprises,

the third set includes a plurality of mutually orthogonal sequences, the length of the sequences in the third set is smaller than the length of the sequences in the first set, and the sequences in the third set are base sequences of the sequences in the first set.
The method according to any one of claims 8 to 10, wherein,

the network equipment sends indication information to the tag, wherein the indication information indicates the first numerical value; alternatively, the indication information indicates the second value.
A tag comprising one or more processors, a communication interface, the one or more processors and the communication interface to support the communication device to perform the method of transmitting signals according to any of claims 1-6.
A network device, characterized in that the network device comprises one or more processors, a communication interface for supporting the communication means to perform the method of transmitting signals according to any of claims 7-12.
A computer readable storage medium comprising computer instructions which, when run on a computer, cause the computer to perform the transmission signal method of any one of claims 1-6 or the transmission signal method of any one of claims 7-12.
A computer program product comprising instructions which, when run on a computer, cause the computer to perform the transmission signal method of any one of claims 1-6 or the transmission signal method of any one of claims 7-12.
A communication system comprising a tag according to claim 13 and a network device according to claim 14, capable of performing the method of transmitting signals according to any of claims 1-6 or the method of transmitting signals according to any of claims 7-12.