CN117917670A

CN117917670A - Communication method and device

Info

Publication number: CN117917670A
Application number: CN202211296381.3A
Authority: CN
Inventors: 陈冬明; 蒋金弟; 李少华; 陈雍珏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2024-04-23
Also published as: WO2024082967A1

Abstract

A communication method and a device relate to the technical field of communication, and can reduce the idle time delay of an antenna of a reader-writer in the inventory process, reduce the inventory time of the reader-writer to a tag and improve the inventory speed. The method may include: transmitting an inquiry signaling through the first antenna, and if the first information from the first device is not detected in 2 ^Q time slots, switching to the second antenna to transmit the inquiry signaling; the query signaling is used for indicating a first time slot counting parameter Q value, the first Q value is 0, and the Q value is used for detecting the first device.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus.

Background

Radio frequency identification (radio frequency identification, RFID) technology is a contactless automatic identification technology. RFID systems typically include a reader and a tag. The reader/writer may send selection signaling to select one or more tags for inventory, and the reader/writer may also send query signaling to the tags to initialize an inventory cycle.

The query signaling may include a slot-count parameter (Q) value, and one inventory period may include 2 ^Q slots, and the reader/writer may determine whether there is a tag in each slot. When the tag receives the query signaling, a random number belonging to [0,2 ^Q -1] can be generated as a time slot counter according to the Q value, and when the time slot counter is decremented by 1 and the time slot counter is equal to 0 after receiving a query repetition (QueryRep) signaling, the tag can send a random number. If the reader-writer successfully receives the random number sent by the tag, the reader-writer can send confirmation information to the tag. After the reader/writer finishes inventory of one label, a query repetition signaling can also be sent to trigger inventory of the next label.

In order to reduce the cost, the reader-writer can usually support a plurality of antennas, and tags can be inventoried in a time division multiplexing mode among different antennas. When each antenna of the reader-writer inventory the tag, if the tag to be inventory is not in the coverage area of the current antenna, the antenna can idle.

How to reduce the idle time delay of the antenna of the reader-writer and the inventory time of the reader-writer to the tag during inventory becomes a technical problem to be solved.

Disclosure of Invention

The application provides a communication method and a communication device, which can reduce the idle time delay of an antenna of a reader-writer in the inventory process, realize the rapid switching of the antenna, reduce the inventory time of the reader-writer to a tag and improve the inventory speed.

In a first aspect, an embodiment of the present application provides a communication method, where the method may be applied to a second device, and the method may include: transmitting a query signaling through a first antenna; if the first information from the first device is not detected in 2 ^Q time slots, switching to the second antenna to send a query signaling; the query signaling is used for indicating a first time slot counting parameter Q value, the first Q value is 0, and the Q value is used for detecting the first device.

Based on the first aspect, since one inventory period is 2 ^Q time slots, the second device (such as the reader/writer) sets the first Q value to 0, that is, the second device sets one inventory period to 1 time slot, if the first device (such as a tag) to be inventoried exists in the coverage area of the first antenna, the second device receives the first information sent by the first device in the 1 time slot, if the first device to be inventoried does not exist in the coverage area of the first antenna, the second device does not receive the first information sent by the first device in the 1 time slot, so that whether the first device to be inventoried exists in the coverage area of the first antenna can be detected rapidly, and if the first device to be inventoried does not exist, the second device can be directly switched to the second antenna, thereby reducing idle delay of the first antenna, reducing invalid inventory time, reducing inventory time of the second device to the first device, and improving inventory efficiency.

In one possible design, if the first information is not detected in 2 ^Q slots, the collision probability is set to 0; wherein the collision probability is a collision probability between one or more first devices.

In one possible design, if the collision probability is 0, the switch is made to the second antenna to send the query signaling.

Based on the two possible designs, the second device may set the collision probability to 0 when the first information is not detected in 2 ^Q time slots, so as to indicate that the first device to be inventoried does not exist in the coverage area of the first antenna, and further the second device may switch to the second antenna to inventory, so as to realize switching between the antennas.

In one possible design, if at least two conflicting first information are detected in 2 ^Q slots, query adjustment signaling is sent; wherein the at least two first information in which a collision exists are at least two first information detected in the same time slot; the query adjustment signaling includes a second Q value that is greater than the first Q value.

Based on the possible design, if the second device detects at least two first information with conflicts in2 ^Q time slots, it can indicate that a plurality of first devices to be inventoried exist in the coverage area of the first antenna, the second device can adjust the Q value to be a second Q value, the probability that the initial values of the time slot counters determined by different first devices according to the second Q value are the same is reduced, the collisions between the first devices are reduced, and therefore a large number of first devices are inventoried quickly, and the inventoriing success rate of the first devices is improved.

In one possible design, for the ith slot, 1.ltoreq.i.ltoreq.2 ^Q; if at least two first information with conflicts are detected in the ith time slot, the collision probability is adjusted once; if at least two first information items having collision are not detected in the ith time slot, the collision probability is not adjusted. Wherein 1.ltoreq.i.ltoreq.2 ^Q may also be described as i traversals 1 through 2 ^Q.

Based on this possible design, the second device may also adjust the collision probability to indicate that there is a first device to inventory within the coverage area of the first antenna when at least two conflicting first information are detected in 2 ^Q slots.

In one possible design, if there is no collision between the first information detected in2 ^Q slots, acknowledgement information is sent to the first device to which the first information is associated; if the second information from the first equipment associated with the first information is not successfully detected, sending a query adjustment signaling; the query adjustment signaling includes a second Q value, which is greater than the first Q value.

Based on the possible design, if the second device does not successfully detect the second information from the first device associated with the first information, the second device can indicate that a plurality of first devices to be inventoried exist in the coverage area of the first antenna, the second device can adjust the Q value to be a second Q value, the probability that the initial values of the time slot counters determined by different first devices according to the second Q value are the same is reduced, the collision among the first devices is reduced, a large number of first devices are inventoried quickly, and the inventoriing success rate of the first devices is improved.

In one possible design, for the ith slot, 1.ltoreq.i.ltoreq.2 ^Q; if no conflicting first information is detected in the ith time slot, but second information from first equipment associated with the first information is not successfully detected, adjusting the collision probability once; if no conflicting first information is detected in the ith time slot and the second information from the first device associated with the first information is successfully detected, no adjustment is made to the collision probability. Wherein 1.ltoreq.i.ltoreq.2 ^Q may also be described as i traversals 1 through 2 ^Q.

Based on this possible design, the second device may also adjust the collision probability to indicate that there is a first device to inventory within the coverage of the first antenna when the second information from the first device associated with the first information is not successfully detected.

In one possible design, when the first information is detected in 2 ^Q slots, if the collision probability is not 0, a query adjustment signaling is sent.

Based on the possible design, if the collision probability is not 0, it can be indicated that there are first devices to be inventoried in the coverage area of the first antenna, and then the second device can adjust the Q value to a second Q value, so as to reduce the probability that the initial values of the time slot counters determined by different first devices according to the second Q value are the same, reduce the collision between the first devices, thereby rapidly inventoriing a large number of first devices and improving the inventoriing success rate of the first devices.

In one possible design, the second Q value is determined based on the probability of collision.

Based on the possible design, the second device determines the second Q value according to the collision probability, so that the second Q value can be matched with the number of the first devices to be inventoried in the coverage range of the first antenna as much as possible, and the inventoriing success rate of the first devices is improved.

In a second aspect, an embodiment of the present application provides a communication method, which may be applied to a first device, and the method may include: receiving query information from a second device; wherein; the query information comprises a first time slot counting parameter Q value, wherein the first Q value is 0; determining an initial value of a time slot counter according to the first Q value; and when the value of the time slot counter is updated to 0, the first information is sent to the second device.

In one possible design, query adjustment signaling is received from a second device; the query adjustment signaling comprises a second Q value, and the second Q value is larger than the first Q value; and updating the initial value of the time slot counter according to the second Q value.

Based on the possible design, if a first device to be inventoried exists in the coverage area of the first antenna, the second device can adjust the Q value to a second Q value, the probability that the initial values of the time slot counters determined by different first devices according to the second Q value are the same is reduced, the collision among the first devices is reduced, a large number of first devices are inventoried rapidly, and the inventoriing success rate of the first devices is improved.

In a third aspect, an embodiment of the present application provides a communication apparatus, where the communication apparatus may be applied to the second device in the first aspect or the possible designs of the first aspect, so as to implement a function performed by the second device, and the communication apparatus may be the second device, or may be a chip or a system on a chip of the second device, or the like, and the communication apparatus may perform, by using hardware, a function performed by the second device, or may be implemented by using hardware to perform a corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. Such as a transceiver module and a processing module. The receiving and transmitting module is used for sending inquiry signaling through the first antenna; the query signaling is used for indicating a first time slot counting parameter Q value, the first Q value is 0, and the Q value is used for detecting first equipment; and the transceiver module is further used for switching to the second antenna to send the query signaling if the processing module does not detect the first information from the first device in 2 ^Q time slots.

In a possible design, the processing module is further configured to set the collision probability to 0 if the first information is not detected in 2 ^Q slots; wherein the collision probability is a collision probability between one or more first devices.

In one possible design, the transceiver module is specifically configured to switch to the second antenna to send the query signaling if the collision probability is 0.

In a possible design, the transceiver module is further configured to send a query adjustment signaling if the processing module detects at least two first information in2 ^Q timeslots; wherein the at least two first information in which a collision exists are at least two first information detected in the same time slot; the query adjustment signaling includes a second Q value that is greater than the first Q value.

In one possible design, for the ith slot, 1.ltoreq.i.ltoreq.2 ^Q; the processing module is further used for adjusting the collision probability once if at least two first information with collision are detected in the ith time slot; the processing module is further configured to not adjust the collision probability if at least two first information with collision are not detected in the ith time slot. Wherein 1.ltoreq.i.ltoreq.2 ^Q may also be described as i traversals 1 through 2 ^Q.

In a possible design, the transceiver module is further configured to send acknowledgement information to the first device associated with the first information if the processing module does not have a conflict between the first information detected in 2 ^Q timeslots; the receiving and transmitting module is further used for transmitting a query adjustment signaling if the processing module does not successfully detect the second information from the first equipment associated with the first information; the query adjustment signaling includes a second Q value, which is greater than the first Q value.

In one possible design, for the ith slot, 1.ltoreq.i.ltoreq.2 ^Q; the processing module is further used for adjusting the collision probability once if the first information which does not have the collision is detected in the ith time slot, but the second information from the first equipment associated with the first information is not successfully detected; the processing module is further configured to, if no conflicting first information is detected in the ith time slot and the second information from the first device associated with the first information is successfully detected, not adjust the collision probability. Wherein 1.ltoreq.i.ltoreq.2 ^Q may also be described as i traversals 1 through 2 ^Q.

In one possible design, the transceiver module is further configured to send a query adjustment signaling if the collision probability is not 0 when the processing module detects the first information in 2 ^Q slots.

In one possible design, the processing module is further configured to determine the second Q value according to a collision probability.

It should be noted that, the modules involved in the third aspect or the possible designs of the third aspect may perform the corresponding functions in the method examples of the first aspect, and specific reference may be made to the detailed descriptions in the method examples, and beneficial effects may also be referred to the related descriptions of the first aspect, which are not repeated herein.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, where the communication apparatus may be applied to the first device in the second aspect or the possible designs of the second aspect, so as to implement a function performed by the first device, and the communication apparatus may be the first device, or may be a chip or a system on a chip of the first device, or may be implemented by executing, by using hardware, a function performed by the first device, or may be implemented by using hardware to execute corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. Such as a transceiver module and a processing module. The receiving and transmitting module is used for receiving inquiry information from the second equipment; wherein; the query information comprises a first time slot counting parameter Q value, wherein the first Q value is 0; the processing module is used for determining the initial value of the time slot counter according to the first Q value; and the receiving and transmitting module is also used for transmitting the first information to the second equipment when the value of the time slot counter is updated to 0.

In one possible design, the transceiver module is further configured to receive query adjustment signaling from the second device; the query adjustment signaling comprises a second Q value, and the second Q value is larger than the first Q value; and the processing module is also used for updating the initial value of the time slot counter according to the second Q value.

It should be noted that, the modules involved in the fourth aspect or the possible designs of the fourth aspect may perform the corresponding functions in the method examples of the second aspect, and specific reference may be made to the detailed descriptions in the method examples, and beneficial effects may also be referred to the relevant descriptions of the second aspect, which are not repeated herein.

In a fifth aspect, embodiments of the present application provide a communication device comprising one or more processors; one or more processors configured to execute a computer program or instructions that, when executed by the one or more processors, cause a communication device to perform the communication method according to any one of the first to second aspects.

In one possible design, the communication device further includes one or more memories coupled to the one or more processors, the one or more memories for storing the computer programs or instructions. In one possible implementation, the memory is located outside the communication device. In another possible implementation, the memory is located within the communication device. In embodiments of the present application, the processor and the memory may also be integrated in one device, i.e., the processor and the memory may also be integrated. In a possible implementation, the communication device further comprises a transceiver for receiving information and/or transmitting information.

In one possible design, the communication device further includes one or more communication interfaces coupled to the one or more processors, the one or more communication interfaces configured to communicate with other modules outside of the communication device.

In a sixth aspect, an embodiment of the present application provides a communication apparatus, including an input-output interface and a logic circuit; an input-output interface for inputting and/or outputting information; logic circuitry is to perform the communication method of any of the first to second aspects, process and/or generate information based on the information.

In a seventh aspect, embodiments of the present application provide a computer-readable storage medium storing computer instructions or a program that, when run on a computer, cause the communication method according to any one of the first to second aspects to be performed.

In an eighth aspect, an embodiment of the present application provides a computer program product comprising computer instructions which, when run on a computer, cause the communication method according to any one of the first to second aspects to be performed.

In a ninth aspect, an embodiment of the present application provides a computer program which, when run on a computer, causes the communication method as set forth in any one of the first to second aspects to be performed.

The technical effects brought about by any of the design manners of the fifth aspect to the ninth aspect can be seen from the technical effects brought about by any of the first aspect to the second aspect.

In a tenth aspect, embodiments of the present application provide a communication system, which may include a second device according to the third aspect and a first device according to the fourth aspect.

Drawings

Fig. 1 is a schematic diagram of a communication principle of an RFID system according to an embodiment of the present application;

FIG. 2 is a flow chart of selecting, inventory and accessing tags by a reader provided by an embodiment of the present application;

Fig. 3 is a schematic diagram of a communication principle of a reader-writer according to an embodiment of the present application;

FIG. 4 is a schematic view of a multi-door warehouse entry and exit scenario provided by an embodiment of the present application;

fig. 5 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 6 is a schematic diagram of a communication system according to an embodiment of the present application;

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

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

fig. 9 is a schematic diagram of a composition structure of a communication device according to an embodiment of the present application;

FIG. 10 is a flow chart of a communication method according to an embodiment of the present application;

FIG. 11 is a flow chart of a communication method according to an embodiment of the present application;

FIG. 12 is a flow chart of a communication method according to an embodiment of the present application;

fig. 13 is a schematic diagram of a link timing diagram according to an embodiment of the present application;

Fig. 14 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 15 is a block diagram of a communication device according to an embodiment of the present application.

Detailed Description

The following describes embodiments of the present application in detail with reference to the drawings.

Radio frequency identification (radio frequency identification, RFID) technology: the method is a non-contact automatic identification technology or is described as a technology for non-contact bidirectional data communication in a wireless radio frequency mode, is mainly used for identification, and further can be used for user data reading and writing. RFID systems may generally include readers (readers) and tags (tags).

Among them, in 1937, RFID technology was derived due to the development and progress of radar technology. In 1948, ha Li stoken "communication with reflected power" laid the theoretical foundation for RFID technology. RFID technology belongs to the field of automatic identification and data acquisition in information technology (information technology, automatic identification and data capture techniques, AIDC) in the classification of the international organization for standardization, and is responsible for formulation by the international organization for standardization (international organization for standardization, ISO) and the international electrotechnical commission (international electrotechnical commission, IEC). The earliest RFID standardization process can be traced to the 80 s of the 20 th century, and the International organization for standardization and International electrotechnical Commission in 1987 have jointly established JTC-1 on the basis of the original information handling system technical Commission (ISO TC-97), the microprocessor division technical Commission (IEC TC-47/SC 47B), and the information technology equipment technical Commission (IEC TC-83). The automatic identification and data acquisition technology brings high efficiency, high reliability and automation for informatization management, is a technology commonly adopted in international commodity circulation and even whole supply chain management, and needs to realize standardization and standardization. The automatic identification technology is developed into an independent technical standardization working field, so that the production cost of the RFID related products is further reduced, and the application field is gradually increased. RFID technology is recognized as one of the major application technologies in the 21 st century.

A reader/writer: the device with read-write function may be, for example, a handheld or stationary device that reads or writes tag information. Or may be understood as a device in communication with the tag.

And (3) tag: may also be referred to as an electronic tag or an RFID tag, and may be classified into a passive tag, a semi-active tag, and an active tag according to whether or not self-charging is required, in terms of tag attributes.

For passive tags, which do not include a battery inside, the energy for their operation may be provided by the reader. The reader-writer can emit energy to excite the tag, the tag carries information through reflecting excitation energy, and then the reader-writer receives and demodulates the information. For example, part of the energy of Continuous Wave (CW) transmitted from the reader/writer can be used for internal processing such as encoding/decoding of a tag and modulation/demodulation. In addition, the continuous wave can also be used as a carrier wave for carrying uplink information of the tag. Passive tags may also be referred to as passive internet of things devices (PASSIVE INTERNET of things, passive IOT). Based on this mode of operation, passive tags can be made lower in cost and longer in operational life.

For semi-active tags, the interior may include a battery, and the internal processing such as encoding and decoding, modem, etc. may be battery powered, but still require a continuous wave of the reader-writer as the carrier wave.

For the active tag, the inside of the active tag can comprise a battery, the active tag can actively transmit information by using the battery carried by the active tag, the price of the active tag is high, and the service life of the active tag is limited by the capacity and the use frequency of the battery.

For example, as shown in fig. 1, in the RFID technology, devices having both transmitting and receiving capabilities are designed integrally, so that a signal waveform can be generated in a reader-writer, signal transmission is performed through an antenna, and signals are propagated through an air interface and then reach a tag. The tag collects energy according to the received signal, if the power is larger than the excitation threshold, the tag is excited to perform signal sensing and backscatter signals to the reader, and the reader performs signal receiving to complete communication between the reader and the tag.

The method is limited by poor receiving sensitivity of the tag and small reflected energy, and the communication distance between the reader-writer and the tag is relatively short. For example: the Low Frequency (LF) RFID read/write distance is less than 0.1 meter, the High Frequency (HF) RFID read distance is 0.1-0.2 meter, the ultra high frequency (ultra high frequency, UHF) RFID read distance is less than 15 meters (e.g., passive tag), and so on.

In the RFID system, a reader/writer may perform operations such as selection (select), inventory (inventory), access (access), and the like on a tag. The select operation is used to select a tag or a set of tags for disk and access. A disk operation can be understood as a process in which a reader identifies a tag. An access operation may be understood as a process in which a reader interacts with a tag. The tag needs to be identified by the reader before access.

The process of selecting, inventory and accessing the tag by the reader/writer may be as shown in fig. 2. Referring to fig. 2, the process includes the steps of:

Step 201, the reader/writer sends a selection (Select) signaling.

The reader-writer can select one or more tags based on one or more values in the tag memory, and the tags meeting the selection conditions are selected to enter a state to be inventoried. Step 201 is an optional step, for example, step 201 may not be performed when the label to be inventoried is all the labels stored in the current label memory.

Step 202, the reader sends Query (Query) signaling.

Wherein the reader/writer sends a query signaling that can be used to initialize a disk period.

The query signaling may inform the rate of the tag inventory, the coding scheme, and the slot count parameter (Q) value.

Wherein, the Q value refers to a parameter used by the reader to adjust the tag response probability. One inventory period may include 2 ^Q slots, and the reader/writer may determine whether there is a tag in each slot.

The plurality of tags selected by the reader-writer can be subjected to disk access in a time division multiplexing mode, namely, after the reader-writer finishes disk access to one tag, the reader-writer starts disk access to the next tag. The following steps will be described taking a disk access to 1 tag as an example.

Step 203, the tag sends a Random Number (RN) to the reader/writer.

The random number may be, for example, a 16-bit random number (RN 16).

Specifically, when the tag receives the query signaling, a random number belonging to [0,2 ^Q -1] can be generated as a time slot counter according to the Q value.

If the value of the time slot counter is 0, the tag can send a 16-bit random number to the reader as handshake information, and if the value of the time slot counter is not 0, the tag can not send any response information to the reader.

When the value of the slot counter is not 0, the tag may also decrease the slot counter by 1 when each query repetition (query rep) signaling is received, and when the slot counter is equal to 0, the tag sends the RN16 to the reader-writer.

When the value of the time slot counter is not 0, the tag can also adjust the initial value of the time slot counter according to the Q value in the query adjustment signaling when the query adjustment signaling comprising the Q value is received.

Step 204, the reader/writer feeds back Acknowledgement (ACK) information to the tag.

If the reader-writer successfully receives the random number sent by the tag, the reader-writer can send confirmation information to the tag. The identification information may include a random number that is sent to the reader/writer by the tag.

After receiving the acknowledgement message carrying the random number sent by the tag within the specified time, the tag may execute step 205 described below.

Step 205, the tag sends product electronic code (electronic product code, EPC) information to the reader.

When the tag receives the confirmation information sent by the reader, the tag indicates that the reader and the tag handshake succeed, the tag can report EPC information to the reader, and the tag enters a confirmation state.

Step 206, the reader sends a request random number command to the tag.

Wherein the request random number command may be used to request the tag to re-report a new random number.

When the reader-writer receives EPC information sent by the tag, it may send a request random number command to the tag, where the request random number command may include RN16 reported by the tag.

Step 207, the tag sends a 16-bit random number handle (handle) to the reader.

After receiving the request random number command, if the RN16 included in the request random number command is the same as the RN16 of the tag itself, the tag may generate and store a new 16-bit random number handle (handle), send the new 16-bit random number handle to the reader, and enter an open (open) state or a security (safe) state or an accessed state. If the request random number command includes an RN16 that is different from the RN16 of the tag itself, the tag may not respond to the request random number command.

Step 208, the reader sends an access command to the tag.

When the reader-writer receives the 16-bit random number handle sent by the tag, the 16-bit random number handle can be carried in an access command and sent to the tag.

Step 209, the tag responds to the access command.

When the tag receives the access command, the 16-bit random number handle in the access command can be checked, if the access command is matched, the tag can respond to the access command, and if the access command is not matched, the tag can not respond to the access command.

After the reader/writer finishes inventory of one label, a query repetition signaling can also be sent to trigger inventory of the next label.

In order to reduce the cost, as shown in fig. 3, the reader-writer can generally support multiple antennas (e.g. 4-8 antennas), and since the transceiver link of the reader-writer chip has only a single channel, the different antennas (or antenna ports) adopt a time division multiplexing (or time division scheduling) manner, which results in longer inventory time of the reader-writer.

In addition, when each antenna of the reader-writer inventory the tag, if the coverage area of the current antenna does not have the tag to be inventory, the antenna can idle.

For example, as shown in fig. 4, in the multi-door warehouse-in/out scenario, there is no tag in the coverage area of the antenna that is being inventory in the reader-writer, if there is no tag in the coverage area of the current antenna, the antenna will idle, if there is a tag in the coverage area of other antennas, because different antennas adopt a time division multiplexing mode, after the inventory of the current antenna is completed (such as idle completion), the other antennas can start inventory the tag in the coverage area of the reader-writer, which results in longer inventory time of the reader-writer.

In summary, how to reduce the idle time delay of the antenna of the reader-writer during the inventory process, reduce the inventory time of the reader-writer, and realize the rapid inventory of the tag is a technical problem to be solved.

In order to solve the technical problem, an embodiment of the present application provides a communication method, in which a second device sends a query signaling through a first antenna, and if first information from the first device is not detected in 2 ^Q timeslots, the second device switches to the second antenna to send the query signaling; the query signaling is used for indicating a first time slot counting parameter Q value, where the first Q value is a smaller value such as 0, 1 or 2, and the Q value is used for detecting the first device.

In the embodiment of the application, since one inventory period is 2 ^Q time slots, the second device (such as a reader) can set the first Q value to be a smaller value such as 0,1 or 2, namely the second device can set one inventory period to be 1 time slot or less, if the first device (such as a tag) to be inventoried exists in the coverage area of the first antenna, the second device can receive the first information sent by the first device in the 1 or less time slots, if the first device to be inventoried does not exist in the coverage area of the first antenna, the second device can not receive the first information sent by the first device in the 1 or less time slots, so that whether the first device to be inventoried exists in the coverage area of the first antenna can be detected quickly, and if the first device to be inventoried does not exist, the second device can be directly switched to the second antenna, thereby reducing the idling delay of the first antenna, reducing the time of the second device to the first device, realizing the quick inventory efficiency of the first device.

The communication method provided by the embodiment of the application can be used in any communication system, which can be a third generation partnership project (third generation partnership project,3 GPP) communication system, for example, an RFID system, a long term evolution (long term evolution, LTE) system, a fifth generation (fifth generation, 5G) mobile communication system, a New Radio (NR) communication system, a vehicle networking (vehicle to everything, V2X) system, a system in which LTE and 5G are mixed, or a non-terrestrial communication network (non-TERRESTRIAL NETWORK, NTN) system, a device-to-device (D2D) communication system, a machine-to-machine (machine to machine, M2M) communication system, an internet of things (internet of things, ioT), a near field wireless communication (NEAR FIELD communication, NFC) system, a microwave communication (uWave) system, and other future communication systems, such as a passive internet of things defined by 6G, future 3GPP, and the like, and can also be a non-3 GPP communication system, such as a wireless local area network (wireless local area network, without limitation.

The communication method provided by the embodiment of the application can be applied to various scenes such as RFID scenes, X-IoT (X can be passive, semi-passive internet of things and the like), warehouse, logistics, manufacturing, retail, asset management, bayonet or production line and the like without limitation.

It should be noted that the above communication system and communication scenario to which the present application is applied are merely examples, and the communication system to which the present application is applied is not limited thereto, and is generally described herein, and will not be described in detail.

A communication system provided by an embodiment of the present application will be described below by taking fig. 5 as an example.

Fig. 5 is a schematic diagram of a communication system according to an embodiment of the present application, where, as shown in fig. 5, the communication system may include one or more first devices and one or more second devices.

The first device may be a device that communicates with a device having a read/write function (i.e., a second device). The energy and/or carrier wave required by the first device to operate may be provided by the second device. The first device may communicate with the second device via a carrier provided by the second device.

The first device may be a tag, a terminal device capable of implementing a tag function, or a module or a chip capable of implementing a tag function, for example, without limitation.

The second device may be a device with a read-write function, and may be a device that reads or writes information of the first device in a handheld or fixed manner. The second device may include multiple antennas and may transmit, excite, and demodulate the RFID tag signals (or alternatively described as excitation signals, RFID signals) through the respective antennas to enable inventory of the first device. The second device may also dynamically adjust the Q value to increase the inventory success rate of the first device while ensuring that the antenna idle delay of the second device is small.

The second device may be a reader, a terminal device capable of implementing a read-write function, a network device capable of implementing a read-write device, or the second device may be a module or a chip capable of implementing a read-write function, without limitation.

Wherein the first device may be located within a coverage area provided by the second device. When the second device is a terminal device capable of implementing a read-write function, communication between the first device and the second device can be regarded as communication between the terminal devices. When the second device is a network device capable of implementing a read-write function, communication between the first device and the second device may be regarded as air interface communication, that is, communication between the first device and the second device is performed through a Uu interface.

The reader/writer may be an integrated structure as shown in fig. 6 (a), a wireless transmission/reception separated structure as shown in fig. 6 (b), or a wired transmission/reception separated structure as shown in fig. 6 (c), without limitation.

For example, under a split architecture, the reader may include a helper (helper) and a receiver (receiver). Downstream communication can be performed between the auxiliary device and the first device (such as a tag), and upstream and downstream communication can be performed between the auxiliary device and the receiver through an air interface or a wired connection. The receiver may manage the accessory and may also receive signals reflected by the first device or described as receiving uplink signals transmitted by the first device. The auxiliary device may send an excitation signal to the first device within its coverage area according to the signaling issued by the receiver. The auxiliary devices may also be referred to as excitation sources, exciters, excitation nodes, etc., without limitation.

The auxiliary device can be a terminal device, a base station or a small station, only downlink data is arranged between the auxiliary device and the first device, uplink and downlink data transmission is arranged between the auxiliary device and the receiver, and the auxiliary device and the receiver can be connected through an air interface or a wire.

For example, as shown in fig. 6 (b), the receiver may perform downlink communication with the secondary device, e.g., the receiver may send downlink control signaling to the secondary device; the auxiliary device can send an excitation signal to the tag according to the downlink control signaling, and the tag can send an uplink signal to the receiver according to the excitation signal, so that communication with the receiver is realized.

For the terminal device, the terminal device may be a device having a wireless transceiving function or may be provided to a chip or a chip system of the device. The terminal device may also be referred to as a User Equipment (UE) or a terminal (terminal) or a Mobile Station (MS) or a Mobile Terminal (MT), etc. The terminal device may be a handheld device, a vehicle-mounted device, etc. with a wireless connection function, such as a mobile phone (mobile phone), a tablet computer, a notebook, a palm computer, or a computer with a wireless transceiver function. The terminal device may also be, without limitation, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) terminal, an augmented reality (augmented reality, AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), a vehicle-mounted terminal, a vehicle with vehicle-to-vehicle (V2V) communication capability, an intelligent network train, an unmanned aerial vehicle with unmanned aerial vehicle-to-unmanned aerial vehicle (UAV to, U2U) communication capability, and the like.

For the network device, the network device may be any device deployed in the access network and capable of performing wireless communication with the terminal device, and is mainly used for implementing the functions of wireless physical control, resource scheduling and wireless resource management, wireless access control, mobility management, and the like. Specifically, the network device may be a device supporting wired access, or may be a device supporting wireless access. The network device may be, for example, AN Access Network (AN)/radio access network (radio access network, RAN) device, consisting of a plurality of AN/RAN nodes. The AN/RAN node may be: a base station (NB), macro base station, micro base station, relay station, enhanced base station (eNB), next generation base station (NR nodeB, gNB), radio network controller (radio network controller, RNC), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (e.g., home evolved base station (home evolved nodeB), home base station (HNB)), base Band Unit (BBU), access point (access point, AP), or wireless fidelity AP (WIRELESS FIDELITY AP, wi-Fi AP), transmission reception point (transmission reception point, TRP), transmission point (transmission point, TP), wireless backhaul node or wireless backhaul node (i.e., IAB node) in an access backhaul integrated (INTEGRATED ACCESS AND backhaul, IAB), or some other access node or reader/writer, reader/writer device, etc. are not limited.

Optionally, the network device may also be a centralized unit (centralized unit, CU)/Distributed Unit (DU) architecture. At this time, the network device may include a CU, or include a DU, or include a CU and a DU. The network device comprising CU and DU can split the protocol layer of eNB in LTE, 5G or even future 6G communication system, part of the functions of the protocol layer are put in CU centralized control, and the rest of the functions of all the protocol layers are distributed in DU, and CU centralized control DU. Further, the DU can be split at the physical layer into a DU and a Radio Unit (RU). The interface between the DU and RU may be a common public radio interface (common public radio interface, CPRI) interface, an enhanced common radio interface (enhanced common public radio interface, eCPRI) interface, or a forwarding interface in an open radio access network (open radio access network, O-RAN or ORAN), among other things, depending on the manner of splitting.

Based on the above description, exemplarily, as shown in (a) of fig. 7, taking the first device as a tag and the second device as a base station as an example, the base station may be a micro base station (micro BS), which may communicate with the tag through a Uu interface. As shown in (b) of fig. 7, taking the first device as a tag and the second device as a terminal device as an example, the terminal device may communicate with the tag through a Sidelink (SL). As shown in (c) of fig. 7, taking the first device as a tag and the second device as a base station as an example, the base station may be an IAB node, which may communicate with a Macro base station (Macro BS) through a Uu interface and with the tag through the Uu interface.

In yet another example, communication between the first device and the second device may also support a split architecture. As shown in fig. 8, taking a tag as a first device and a terminal device as an excitation source (home) of a second device as an example, uplink communication or downlink communication can be performed between the terminal device and the base station, as shown in fig. 8 (a), the base station 1 can provide a carrier signal for the tag, uplink communication can be performed between the base station 1 and the tag, and downlink communication can be performed between the tag and the terminal device. Or as shown in (b) of fig. 8, the terminal device may provide a carrier signal for the tag, and downlink communication may be performed between the base station 1 and the tag, and uplink communication may be performed between the tag and the terminal device. Or as shown in fig. 8 (c), the terminal device may provide a carrier signal for the tag, and uplink communication may be performed between the base station 1 and the tag, and downlink communication may be performed between the tag and the terminal device. Or as shown in (d) of fig. 8, the base station 1 may provide a carrier signal for the tag, and downlink communication may be performed between the base station 1 and the tag, and uplink communication may be performed between the tag and the terminal device.

In fig. 8, a base station that can communicate with a tag or a terminal device may be referred to as a co-station (e.g., base station 1) of the tag and the terminal device. A base station that can only communicate with a tag, or a base station that can only communicate with a terminal device, may be referred to as a different station (e.g., base station 2) of the tag from the terminal device.

It should be noted that, in the embodiment of the present application, the first device and the second device may be one or more chips, or may be a System On Chip (SOC) or the like. Fig. 5 is merely an exemplary drawing, which includes no limitation on the number of devices. Furthermore, the communication system may include other devices in addition to the device shown in fig. 5. The names of the devices and the links in fig. 5 are not limited, and the devices and the links may be named as other names besides those shown in fig. 5, without limitation.

In specific implementation, as shown in fig. 5, 6, 7 or 8, the following are: each of the first device and the second device may adopt the constituent structure shown in fig. 9, or may include the components shown in fig. 9. Fig. 9 is a schematic diagram of a communication apparatus 900 according to an embodiment of the present application, where the communication apparatus 900 may be a first device or a chip or a system on a chip in the first device; or may be the second device or a chip or a system on a chip in the second device. As shown in fig. 9, the communication device 900 includes a processor 901, a transceiver 902, and a communication line 903.

Further, the communication device 900 may also include a memory 904. The processor 901, the memory 904, and the transceiver 902 may be connected by a communication line 903.

The processor 901 is 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 901 may also be any other device having processing functions, such as a circuit, a device, or a software module, without limitation.

A transceiver 902 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 transceiver 902 may be a module, circuitry, transceiver, or any device capable of enabling communications.

Communication line 903 is used to transfer information between the components included in communication device 900.

Memory 904 for storing instructions. Wherein the instructions may be computer programs.

The memory 904 may be, but is not limited to, 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 CD-ROM (compact disc read-only memory) or other optical disk storage, an optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, etc.

It is noted that the memory 904 may exist separately from the processor 901 or may be integrated with the processor 901. The memory 904 may be used to store instructions or program code or some data, etc. The memory 904 may be located within the communication device 900 or external to the communication device 900, without limitation. A processor 901 for executing instructions stored in a memory 904 to implement a communication method provided in the following embodiments of the present application.

In one example, processor 901 may include one or more CPUs, such as CPU0 and CPU1 in fig. 9.

As an alternative implementation, communication device 900 includes multiple processors, e.g., processor 907 may be included in addition to processor 901 in fig. 9.

As an alternative implementation, the communication apparatus 900 further comprises an output device 905 and an input device 906. By way of example, the input device 906 is a keyboard, mouse, microphone, or joystick, and the output device 905 is a display screen, speaker (speaker), or the like.

It should be noted that the communication apparatus 900 may be a desktop computer, a portable computer, a web server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a similar structure as in fig. 9. Further, the constituent structure shown in fig. 9 does not constitute a limitation of the communication apparatus, and the communication apparatus may include more or less components than those shown in fig. 9, or may combine some components, or may be arranged in different components, in addition to those shown in fig. 9.

In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices.

Further, actions, terms, and the like, which are referred to between embodiments of the present application, are not limited thereto. The message names of interactions between the devices or parameter names in the messages in the embodiments of the present application are just an example, and other names may be used in specific implementations without limitation.

The communication method provided by the embodiment of the present application will be described with reference to fig. 10 below in conjunction with the communication systems shown in fig. 5 to 8, where the first device may be any one of the first devices in the communication systems shown in fig. 5 to 8, and the second device may be any one of the second devices in the communication systems shown in fig. 5 to 8. The first device and the second device described in the following embodiments may each be provided with the components shown in fig. 9. The processing performed by a single execution body (first device or second device) shown in the embodiment of the present application may also be divided into a plurality of execution bodies, which may be logically and/or physically separated, without limitation.

Fig. 10 is a communication method according to an embodiment of the present application, as shown in fig. 10, the method may include:

step 1001, the second device sends a query signaling through the first antenna.

Wherein the query signaling may be used to indicate a first Q value, which may be 0, which may be used to detect (or describe as querying) the first device.

Alternatively, the first Q value may be 1 or 2 or other smaller values, and in the embodiment of the present application, description is given by taking the first Q value as 0 as an example, and description of the first Q value being 1 or 2 or other smaller values may refer to the description of the first Q value being 0, which is not repeated.

Illustratively, the Q value may be used by the first device receiving the Q value to generate a random number belonging to [0,2 ^Q -1] as the initial value of the slot counter based on the Q value. When the value of the time slot counter is updated to 0, the first device may send the first information to the second device.

Since the first Q value is 0, the inventory period of the second device for inventory through the first antenna is 2 ^Q＝0 =1 time slots, that is, the second device may detect whether the first device exists in the coverage area of the first antenna in the 1 time slots through the first antenna, or it is described that the second device may detect whether the first information sent by the first device may be received in the 1 time slots through the first antenna, or it is described that the second device may detect whether the first information sent by the first device exists in the 1 time slots through the first antenna.

Optionally, the second device determines the first antenna from the multiple antennas of the second device by using a training algorithm, or the second device determines the first antenna from the multiple antennas of the second device by using other algorithms (e.g., a timing training algorithm, a weighted scheduling algorithm, etc.), or the second device randomly selects one antenna from the multiple antennas of the second device as the first antenna, without limitation.

Optionally, as shown in fig. 11, before the second device sends the query signaling through the first antenna, a selection signaling is sent through the first antenna to select one or more first devices, and the first devices meeting the selection condition are selected to enter the to-be-inventoried state.

Alternatively, as shown in fig. 11, before the second device transmits the selection signaling through the first antenna, the second device may receive first indication information, select the first antenna from the plurality of antennas according to the first indication information, and transmit the selection signaling through the first antenna.

Wherein the first indication information may be used to instruct the second device to initiate inventory to the first device.

Optionally, the network device sends the first indication information to the second device.

Step 1002, if the second device does not detect the first information from the first device in 2 ^Q slots, the second device switches to the second antenna to send the query signaling.

The first information may indicate a 16-bit random number, or the first information may be described as RN16 or RN16 information, etc., without limitation.

After the second device sends the query signaling through the first antenna, it may detect whether the first information sent by the first device is received in each of 2 ^Q timeslots.

Optionally, the second device triggers the second device to detect the first information in each of the 2 ^Q slots by sending a query repetition signaling.

The query repetition signaling may also trigger the first device to decrement the value of the slot counter by 1.

For example, the second device may send query repetition signaling after detecting whether the first information exists in the 1 st slot of 2 ^Q slots, trigger the second device to detect whether the first information exists in the 2 nd slot of 2 ^Q slots, then send query repetition signaling, trigger the second device to detect whether the first information sent by the first device exists in the 3 rd slot of 2 ^Q slots, … …, then send query repetition signaling, trigger the second device to detect whether the first information exists in the 2 nd ^Q slot of 2 ^Q slots.

Optionally, the second device detects whether the first information is present in each of the 2 ^Q slots based on a round robin algorithm.

For example, as shown in fig. 11, the second device may detect whether the first information exists in the i-th slot of 2 ^Q slots, and determine whether the i-th slot is the last slot of 2 ^Q slots, if so, complete detection of 2 ^Q slots, and if not, send query repetition signaling to detect whether the first information exists in the next slot. Wherein i is more than or equal to 1 and less than or equal to 2 ^Q; or as i traversals 1 through 2 ^Q.

When the Q value in the query signaling is the first Q value, if the first device does not exist in the coverage area of the first antenna, the second device does not detect the first information sent by the first device in the 2 ^Q＝0 =1 time slots. If one or more first devices exist in the coverage area of the first antenna, the one or more first devices can generate a random number belonging to [0,2 ^Q＝0 -1] as a time slot counter according to the first Q value, that is, the initial value of the time slot counter determined by the one or more first devices is 0, so that first information can be sent to the second device in the 1 time slot, that is, the second device can detect the first information sent by the one or more first devices in the 2 ^Q＝0 =1 time slot. Therefore, whether the first equipment to be inventoried exists in the coverage area of the first antenna can be detected rapidly.

When there is no first device to be inventoried in the coverage area of the first antenna, the second device can be directly switched to the second antenna for inventoriing. In the application, the description of the process of the second device inventory the first device through the second antenna can refer to the description of the process of the second device inventory the first device through the first antenna, and the description is omitted.

Alternatively, if the second device does not detect the first information in 2 ^Q slots, the second device sets the collision probability to 0.

Optionally, when the collision probability is 0, the second device switches to the second antenna to send the query signaling.

Wherein the collision probability may be a collision probability between one or more first devices.

Based on the method shown in fig. 10, since one inventory period is 2 ^Q slots, the second device sets the first Q value to be a smaller value such as 0,1 or 2, that is, the second device sets one inventory period to be 1 slot or less, if there is a first device to be inventoried in the coverage area of the first antenna, the second device receives the first information sent by the first device in the 1 slot or less, if there is no first device to be inventoried in the coverage area of the first antenna, the second device does not receive the first information sent by the first device in the 1 slot or less, so that whether there is the first device to be inventoried in the coverage area of the first antenna can be detected quickly, if there is no first device to be inventoried, the second device can be directly switched to the second antenna, thereby reducing idle delay of the first antenna, reducing the time of the invalid inventory, reducing the time of the second device to the first device, realizing quick inventory of the first device, and improving the inventory efficiency.

In the method shown in fig. 10, when the coverage area of the antenna of the second device is mostly uncertain whether there is a first device, and the inventory rate also has a certain requirement, by preferentially issuing the query signaling with the Q value of 0, whether there is a first device to be inventoried in the coverage area of the antenna can be rapidly detected, and if there is no first device to be inventoried in the coverage area of the current antenna (such as the first antenna), the method can rapidly switch to other antennas (such as the second antenna) to inventory. However, if there are more to-be-inventoried first devices in the coverage area of the current antenna, the Q value is set to 0, so that the fast inventoriing of the first devices cannot be realized.

That is, when each antenna of the second device starts inventory, if the Q value in the query signaling is set to be larger, the probability that the initial values of the slot counters determined by different first devices according to the Q value are the same is reduced, that is, collision between the first devices is reduced, the second device can inventory a large number of first devices quickly, inventory success rate of the first devices is improved, but idle running delay of the antenna is larger for a scene with a smaller number of first devices. If the Q value in the query signaling is set smaller, the idle delay of the antenna can be reduced, and then the fast switching of the antenna is realized, but for the scene that the number of the first devices is more, the probability that the initial values of the time slot counters determined by different first devices according to the Q value are the same is increased, that is, the collision between the first devices is increased, and the inventory success rate of the first devices is reduced.

Therefore, how to set the Q value in the inventory process, so as to improve the inventory success rate of the first device while ensuring that the idle delay of the antenna of the second device is smaller, is a technical problem to be solved.

In order to solve the above technical problem, in a first possible implementation manner, the initial Q value may be set to a larger value (for example, the Q value is 4, or may be adjusted according to the number of the first devices), the Q value is adaptively adjusted in the inventory process according to the idle, collision probability and success rate of the first devices, and finally the Q value is converged to 0, so as to complete inventory of the current antenna, and then the inventory is switched to other antennas to achieve the relative balance of the inventory success rate and the inventory time.

However, in this possible implementation, even if the coverage area of the antenna does not have the first device, the second device needs to go through [2 ^Q,2^Q+2^Q-1+……+2⁰ ] inventory slots to switch to the next antenna, the idle time of a single antenna takes several tens to hundreds of millimeters, the idle time delay of multiple antennas may reach several hundreds of milliseconds, and in a scene with high requirements such as in-out time or pipeline time, the inconsistent remaining idle antennas of the second device are easy to cause unstable inventory results due to the first device entering the coverage area of the antenna.

Based on this, in a second possible implementation manner, the initial Q value may be set to a smaller value (for example, Q value may be set to 0, or Q value may be set to 1 or 2, etc., without limitation), so as to implement fast switching of the antenna when there is no first device in the coverage area of the antenna of the second device. When a first device is present within the coverage area of the antenna of a second device, the Q value may be increased to enable inventory of the first device.

Illustratively, the idle time delay of the single antenna may be reduced to one to five milliseconds when the initial Q value is set to 0, and may be reduced to five to twelve milliseconds when the initial Q value is set to 1 or 2, as compared to the idle time delay of the single antenna in the first possible implementation described above, which may be several tens to several hundreds of milliseconds.

In this second possible implementation manner, taking the second device to inventory the first device through the first antenna as an example, when the first device exists in the coverage area of the first antenna of the second device, the second device may increase the Q value to implement inventory of the first device by referring to the method shown in fig. 12 below.

Fig. 12 is a flowchart of a communication method according to an embodiment of the present application, as shown in fig. 12, the second device may adjust the Q value by using a method shown in the following step 1203, or may adjust the Q value by using a method shown in the following steps 1204 to 1206:

step 1201, the second device communicates with the first antenna to send a query signaling; correspondingly, the first device receives the query signaling sent by the second device.

The query information may include a first Q value, and the first Q value may be 0.

Step 1202, the first device sends first information to the second device.

The first device may generate a random number belonging to [0,2 ^Q -1] as an initial value of the slot counter according to the first Q value, and send the first information to the second device when the value of the slot counter is updated to 0.

Optionally, after the second device sends the query signaling through the first antenna, the second device may also send the query repeat signaling through the first antenna, trigger the first device to decrease the value of the slot counter by 1, and when the value of the slot counter is updated to 0, the first device sends the first information to the second device.

The description of the first information may refer to the description of the first information in fig. 10, which is not repeated.

Step 1203, if the second device detects at least two first information with collision in 2 ^Q time slots, the second device sends a query adjustment signaling.

Wherein the at least two first information in which there is a collision may be at least two first information detected in the same slot; the query adjustment signaling may include a second Q value, which may be greater than the first Q value.

If the second device detects at least two first information with conflicts in 2 ^Q time slots, the second device can indicate that a plurality of first devices to be inventoried exist in the coverage area of the first antenna, the second device can adjust the Q value to be a second Q value, the probability that initial values of time slot counters determined by different first devices according to the second Q value are the same is reduced, the collisions among the first devices are reduced, a large number of first devices are inventoried rapidly, and the inventoriing success rate of the first devices is improved.

Optionally, after the second device sends the query signaling through the first antenna, it may detect whether there are at least two first information that have a collision in each of the 2 ^Q slots.

For example, the second device may send query repetition signaling after detecting whether there are at least two first information with collision in the 1 st slot of 2 ^Q slots, trigger the second device to detect whether there are at least two first information with collision in the 2 nd slot of 2 ^Q slots, then send query repetition signaling, trigger the second device to detect whether there are at least two first information with collision in the 3 rd slot of 2 ^Q slots, … …, then send query repetition signaling, trigger the second device to detect whether there are at least two first information with collision in the 2 nd ^Q slot of 2 ^Q slots.

Optionally, the second device detects whether there are at least two conflicting first information in each of the 2 ^Q slots based on a round robin algorithm.

For example, as shown in fig. 11, the second device may detect whether there are at least two first information with collision in the ith slot of 2 ^Q slots, and determine whether the ith slot is the last slot of 2 ^Q slots, if so, complete detection of 2 ^Q slots, and if not, send query repetition signaling to detect whether there are at least two first information with collision in the next slot. Wherein i is more than or equal to 1 and less than or equal to 2 ^Q.

Optionally, the second device may adjust the collision probability once for each time slot in which at least two first information having a collision can be detected; the second device may not adjust the collision probability for each time slot in which at least two conflicting first information are not detected.

Optionally, the second device determines whether to adjust the collision probability in each of the 2 ^Q slots based on a round robin algorithm.

For example, as shown in fig. 11, the second device may detect whether there are at least two first information that have a collision in the ith slot of 2 ^Q slots, and if so, make a one-time adjustment to the collision probability, and if not, make no adjustment to the collision probability. The second device may further determine whether the i-th slot is a last slot of 2 ^Q slots, if so, complete detection of 2 ^Q slots, and if not, send a query repetition signaling to detect whether there are at least two first information with collision in the next slot. Wherein i is more than or equal to 1 and less than or equal to 2 ^Q. It can also be described that i traverses 1 to 2 ^Q.

Optionally, the second device determines the collision probability according to the amount of the first information in which the collision exists.

Wherein, when the number of first devices in the coverage area of the first antenna is fixed, the larger the number of first information with collision detected by the second device, the larger the collision probability, and the smaller the number of first information with collision detected by the second device, the smaller the collision probability.

Optionally, when the second device detects the first information in 2 ^Q time slots, if the collision probability is not 0, it indicates that the first device to be inventoryed exists in the coverage area of the first antenna, and the second device may send a query adjustment signaling through the first antenna to inventory the first device to be inventoryed.

Optionally, the second device determines a second Q value according to the collision probability.

Wherein, the larger the collision probability, the larger the second Q value, and the smaller the collision probability, the smaller the second Q value.

Step 1204, if the second device does not have a conflict between the first information detected in 2 ^Q time slots, the second device sends acknowledgement information to the first device associated with the first information.

Wherein, when the first information indicates the RN16, the acknowledgement information sent by the second device to the first device associated with the first information may include the RN16.

Step 1205, the first device that receives the acknowledgement information sends second information to the second device.

Wherein the second information may include EPC information.

Step 1206, the second device sends a query adjustment signaling if the second device does not successfully detect the second information from the first device associated with the first information.

The query adjustment signaling may include a second Q value, the second Q value being greater than the first Q value.

For example, the second device not successfully detecting the second information from the first device associated with the first information may include: the second device does not detect the second information from the first device associated with the first information, or the second device detects the second information from the first device associated with the first information, but fails to demodulate the second information.

If the second device does not successfully detect the second information from the first device associated with the first information, it may indicate that the first device to be inventoried exists in the coverage area of the first antenna, the second device may adjust the Q value to a second Q value, reduce the probability that the initial values of the time slot counters determined by different first devices according to the second Q value are the same, reduce the collision between the first devices, thereby rapidly inventoriing a large number of first devices, and improving the inventoriing success rate of the first devices.

Alternatively, for each time slot in which it can be detected that there is no conflicting first information, if the second device does not successfully detect the second information sent by the first device associated with the first information in the time slot, the second device may make an adjustment to the collision probability. If the second device successfully detects the second information sent by the first device associated with the first information, the collision probability may not be adjusted.

Optionally, the second device determines whether to adjust the collision probability in each time slot in which the first information in which no collision is detected based on the round robin algorithm.

For example, as shown in fig. 11, taking an example that the second device detects that there is no first information of collision in the ith time slot, if the second device does not successfully detect the second information sent by the first device associated with the first information in the ith time slot, the second device may adjust the collision probability once. If the second device successfully detects the second information sent by the first device associated with the first information, the collision probability may not be adjusted. The second device may further determine whether the i-th slot is a last slot of 2 ^Q slots, if so, complete detection of 2 ^Q slots, and if not, send a query repetition signaling to detect the first information in the next slot. Wherein i is more than or equal to 1 and less than or equal to 2 ^Q.

Alternatively, the second device may determine the collision probability based on the amount of the second information that is not detected.

Wherein when the number of the first information detected by the second device in the coverage area of the first antenna is fixed, the larger the number of the second information which is not successfully detected by the second device, the larger the collision probability, and the smaller the number of the second information which is not successfully detected by the second device, the smaller the collision probability.

Optionally, when the second device detects the first information and the second information in 2 ^Q time slots, if the collision probability is not 0, it indicates that the first device to be inventoried exists in the coverage area of the first antenna, and the second device may send a query adjustment signaling through the first antenna to inventorie the first device to be inventoried.

Step 1207, the first device sends the first information to the second device according to the second Q value in the query adjustment signaling.

The first device may update an initial value of the slot counter according to the second Q value, and send the first information to the second device when the value of the slot counter is updated to 0.

Alternatively, if the second device successfully detects the second information from the first device associated with the first information, the second device may send a request random number command to the first device, the first device sends a 16-bit random number handle to the second device, and the second device may further achieve access to the first device by sending an access command to the first device, unlike step 1206 described above.

Optionally, if the second device does not have a conflict between the first information detected in 2 ^Q time slots and the second device successfully detects the second information from the first device associated with the first information, the second device may set the collision probability to 0, and further switch to the second antenna to realize inventory of the first device.

Based on the method shown in fig. 12 described above, for example, as shown in fig. 13, communication between the second device and the single first device can be performed with reference to the link timing shown in (a) in fig. 13. The second device and the plurality of first devices may communicate with reference to the link timing shown in (b) of fig. 13. Wherein T1 may represent the time from the transmission of the signal by the second device to the response by the first device; t2 may represent the time to transmit a signal from the first device to the second device; t3 may represent the latency of the second device after T1 until it issues the next signal; t4 may represent a minimum time interval between signals transmitted by the second device.

When the second device issues a query signaling carrying the first Q value through the first antenna, if the second device does not detect the first information in the T1 time, the second device may consider that there is no first device to be inventoried in the coverage area of the first antenna, and the second device may directly switch to the second antenna to inventorie. If the second device detects the first information during the time T1, the second device may inventory the first device normally with reference to the method shown in fig. 12 described above.

Based on the method shown in fig. 10 to 13, the second device may send out a query command with Q value of 0 preferentially every time the second device switches the antennas, so as to quickly detect whether there is a first device to be inventoried in the coverage area of the antenna of the second device. If the first equipment to be inventoried does not exist, the second equipment can be directly switched to the next antenna to be inventoried, if the first equipment to be inventoried exists, the second equipment can normally inventoried the first equipment, and if the first equipment collides, the second equipment can also increase the Q value so as to reduce the collision between the first equipment and realize the inventoriing of the first equipment.

Optionally, based on the description of the first possible implementation manner and the second possible implementation manner, when the second device performs inventory on the first device, the first possible implementation manner may be adopted to set an initial Q value to a larger value, adaptively adjust the Q value in the inventory process, and finally converge the Q value to 0, thereby reducing collision probability between the first devices, rapidly inventory a large number of first devices, and improving inventory success rate of the first device. The second possible implementation manner can be adopted, the initial Q value is set to be a smaller value, whether the first equipment to be inventoried exists in the coverage area of the first antenna is detected rapidly, if the first equipment to be inventoried does not exist, the first antenna is directly switched to the second antenna, the idling delay of the first antenna is reduced, the inventoried efficiency is improved, if the first equipment to be inventoried exists, the Q value can be increased, the collision probability between the first equipment is reduced, the inventoried of the first equipment is realized, and the inventoried success rate is improved.

Optionally, the second device further includes a first switch, when the first switch is in an on state, the second device performs inventory on the first device using the first possible implementation manner, and when the first switch is in an off state, the second device performs inventory on the first device using the second possible implementation manner. Or when the first switch is in an on state, the second device uses the second possible implementation manner to inventory the first device, and when the first switch is in an off state, the second device uses the first possible implementation manner to inventory the first device, without limitation.

It should be noted that, the methods provided in the embodiments of the present application may be implemented separately or combined, and are not limited.

It is to be understood that, in the embodiments of the present application, the execution subject may perform some or all of the steps in the embodiments of the present application, these steps or operations are only examples, and the embodiments of the present application may also perform other operations or variations of the various operations. Furthermore, the various steps may be performed in a different order presented in accordance with embodiments of the application, and it is possible that not all of the operations in the embodiments of the application may be performed.

The scheme provided by the embodiment of the application is introduced mainly from the interaction point of the devices. It will be appreciated that each device, in order to implement the above-described functions, includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware 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.

The embodiment of the application can divide the functional modules of each 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.

In the case where the respective functional modules are divided by the respective functions, fig. 14 shows a communication apparatus 140, and the communication apparatus 140 may perform the actions performed by the first device in fig. 10 to 13 described above or the actions performed by the second device in fig. 10 to 13 described above without limitation.

The communication device 140 may include a transceiver module 1401 and a processing module 1402. The communication device 140 may be, for example, a software module, a hardware circuit, or a software module plus a hardware circuit, or may be a chip applied in the communication device or other combined device, component, etc. having the functions of the communication device. When the communication device 140 is a hardware device, the transceiver module 1401 may be a transceiver, which may include interface circuitry, pins, or antenna and radio frequency circuitry, etc.; the processing module 1402 may be a processor (or processing circuit), such as a baseband processor, which may include one or more CPUs. When the communication device 140 is a component having the above-described communication device functions, the transceiver module 1401 may be a radio frequency unit; the processing module 1402 may be a processor (or processing circuit), such as a baseband processor. When the communication device 140 is a system-on-chip, the transceiver module 1401 may be an input-output interface of a chip (e.g. a baseband chip); the processing module 1402 may be a processor (or processing circuit) of a system-on-chip and may include one or more central processing units. It should be appreciated that the transceiver module 1401 in embodiments of the present application may be implemented by a transceiver or transceiver-related circuit components; the processing module 1402 may be implemented by a processor or processor-related circuit component (alternatively referred to as a processing circuit).

For example, transceiver module 1401 may be used to perform all of the transceiving operations performed by the communication device in the embodiments illustrated in fig. 10-13, and/or to support other processes of the techniques described herein; the processing module 1402 may be used to perform all but the transceiving operations performed by the communication device in the embodiments illustrated in fig. 10-13, and/or other processes for supporting the techniques described herein.

As yet another implementation, the transceiver module 1401 in fig. 14 may be replaced by a transceiver, which may integrate the functionality of the transceiver module 1401; the processing module 1402 may be replaced by a processor, which may integrate the functions of the processing module 1402. Further, the communication device 140 shown in fig. 14 may further include a memory.

Alternatively, when the processing module 1402 is replaced by a processor and the transceiver module 1401 is replaced by a transceiver, the communication device 140 according to the embodiment of the present application may also be the communication device 150 shown in fig. 15, where the processor may be the logic circuit 1501 and the transceiver may be the interface circuit 1502. Further, the communication device 150 shown in fig. 15 may further include a memory 1503.

Embodiments of the present application also provide a computer program product which, when executed by a computer, can implement the functions of any of the method embodiments described above.

The present application also provides a computer program which, when executed by a computer, can implement the functions of any of the method embodiments described above.

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 an internal storage unit of the terminal (including the data transmitting end and/or the data receiving end) of any of the foregoing embodiments, for example, a hard disk or a memory of the terminal. The computer-readable storage medium may be an external storage device of the terminal, such as a plug-in hard disk, a smart card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, or a flash memory card (FLASH CARD) 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.

It should be noted that the terms "first" and "second" and the like in the description, the claims and the drawings of the present application are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

It should be understood that, in the present application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three and three or more, "and/or" for describing an association relationship of an association object, three kinds of relationships may exist, for example, "a and/or B" may mean: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, 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 parts may or may not be physically separate, and the parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. 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 integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be embodied in essence or all or part of the technical solution in the form of a software product stored in a storage medium, where the software product includes several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

Claims

1. A method of communication, comprising:

Transmitting a query signaling through a first antenna; the query signaling is used for indicating a first time slot counting parameter Q value, the first Q value is 0, and the Q value is used for detecting a first device;

And if the first information from the first equipment is not detected in 2 ^Q time slots, switching to a second antenna to send the query signaling.

2. The method according to claim 1, wherein the method further comprises:

If the first information is not detected in 2 ^Q slots, setting a collision probability to 0; wherein the collision probability is a collision probability between one or more of the first devices.

3. The method of claim 2, wherein the switching to the second antenna to send the query signaling comprises:

And if the collision probability is 0, switching to the second antenna to send the query signaling.

4. A method according to any one of claims 1-3, wherein the method further comprises:

If at least two first information with conflict are detected in the 2 ^Q time slots, sending inquiry adjustment signaling; wherein the at least two conflicting first information are at least two first information detected in the same time slot; the query adjustment signaling includes a second Q value that is greater than the first Q value.

5. The method according to claim 4, wherein the method further comprises:

For the ith time slot, wherein i is more than or equal to 1 and less than or equal to 2 ^Q;

If at least two first information with conflicts are detected in the ith time slot, the collision probability is adjusted once;

If at least two first information items having collision are not detected in the ith time slot, the collision probability is not adjusted.

6. The method according to any one of claims 1-5, further comprising:

If no conflict exists between the first information detected in the 2 ^Q time slots, sending acknowledgement information to the first equipment associated with the first information;

If the second information from the first equipment associated with the first information is not successfully detected, sending a query adjustment signaling;

wherein the query adjustment signaling includes a second Q value, the second Q value being greater than the first Q value.

7. The method of claim 6, wherein the method further comprises:

if no conflicting first information is detected in the ith time slot, but second information from first equipment associated with the first information is not successfully detected, adjusting the collision probability once;

If no conflicting first information is detected in the ith time slot and the second information from the first device associated with the first information is successfully detected, no adjustment is made to the collision probability.

8. The method according to claim 5 or 7, wherein said sending said query adjustment signaling comprises:

And when the first information is detected in the 2 ^Q time slots, if the collision probability is not 0, sending the inquiry adjusting signaling.

9. The method of claim 8, wherein the method further comprises:

and determining the second Q value according to the collision probability.

10. A method of communication, comprising:

Receiving query information from a second device; wherein; the query information comprises a first time slot counting parameter Q value, wherein the first Q value is 0;

determining an initial value of a time slot counter according to the first Q value;

And when the value of the time slot counter is updated to 0, transmitting first information to the second equipment.

11. The method according to claim 10, wherein the method further comprises:

Receiving query adjustment signaling from the second device; wherein the query adjustment signaling includes a second Q value, the second Q value being greater than the first Q value;

and updating the initial value of the time slot counter according to the second Q value.

12. A communication device, comprising:

the receiving and transmitting module is used for sending inquiry signaling through the first antenna; the query signaling is used for indicating a first time slot counting parameter Q value, the first Q value is 0, and the Q value is used for detecting a first device;

And the receiving and transmitting module is further used for switching to the second antenna to send the query signaling if the processing module does not detect the first information from the first equipment in 2 ^Q time slots.

13. The apparatus of claim 12, wherein the device comprises a plurality of sensors,

The processing module is further configured to set a collision probability to 0 if the first information is not detected in2 ^Q slots; wherein the collision probability is a collision probability between one or more of the first devices.

14. The apparatus of claim 13, wherein the device comprises a plurality of sensors,

The transceiver module is specifically configured to switch to the second antenna to send the query signaling if the collision probability is 0.

15. The device according to any one of claims 12 to 14, wherein,

The transceiver module is further configured to send a query adjustment signaling if the processing module detects at least two first information that have a conflict in the 2 ^Q slots; wherein the at least two conflicting first information are at least two first information detected in the same time slot; the query adjustment signaling includes a second Q value that is greater than the first Q value.

16. The apparatus of claim 15, wherein the device comprises a plurality of sensors,

The processing module is further configured to adjust collision probability once if at least two first information with collision are detected in the ith time slot;

The processing module is further configured to not adjust the collision probability if at least two first information with collision are not detected in the ith time slot.

17. The device according to any one of claims 12 to 16, wherein,

The transceiver module is further configured to send acknowledgement information to a first device associated with the first information if the processing module does not have a conflict between the first information detected in the 2 ^Q slots;

the transceiver module is further configured to send a query adjustment signaling if the processing module does not successfully detect the second information from the first device associated with the first information;

18. The apparatus of claim 17, wherein the device comprises a plurality of sensors,

The processing module is further configured to adjust the collision probability once if no first information of collision is detected in the ith time slot, but no second information from the first device associated with the first information is successfully detected;

The processing module is further configured to, if no conflicting first information is detected in the ith time slot and second information from a first device associated with the first information is successfully detected, not adjust the collision probability.

19. The device according to claim 16 or 18, wherein,

The transceiver module is further configured to send the query adjustment signaling if the collision probability is not 0 when the processing module detects the first information in the 2 ^Q slots.

20. The apparatus of claim 19, wherein the device comprises a plurality of sensors,

The processing module is further configured to determine the second Q value according to the collision probability.

21. A communication device, comprising:

The receiving and transmitting module is used for receiving inquiry information from the second equipment; wherein; the query information comprises a first time slot counting parameter Q value, wherein the first Q value is 0;

The processing module is used for determining an initial value of a time slot counter according to the first Q value;

the transceiver module is further configured to send first information to the second device when the value of the slot counter is updated to 0.

22. The apparatus of claim 21, wherein the device comprises a plurality of sensors,

The transceiver module is further configured to receive a query adjustment signaling from the second device; wherein the query adjustment signaling includes a second Q value, the second Q value being greater than the first Q value;

The processing module is further configured to update an initial value of the slot counter according to the second Q value.

23. A communication device, the communication device comprising a processor; the processor being operative to execute a computer program or instructions to cause the communication device to perform the communication method of any one of claims 1-9 or to perform the communication method of any one of claims 10-11.

24. A computer readable storage medium, characterized in that the computer readable storage medium stores computer instructions or a program which, when run on a computer, causes the communication method according to any one of claims 1-9 or the communication method according to any one of claims 10-11 to be performed.

25. A computer program product, the computer program product comprising computer instructions; when part or all of the computer instructions are run on a computer, cause the communication method according to any of claims 1-9 to be performed or the communication method according to any of claims 10-11 to be performed.

26. A communication system comprising a communication device according to any one of claims 12-20 and a communication device according to claim 21 or 22.