CN117956621A - Signal detection method, signal transmission device and storage medium - Google Patents

Abstract

The embodiment of the disclosure provides a signal detection method, a signal transmission device and a storage medium, relates to the technical field of communication, and is used for reducing the collision probability of access signals of a plurality of terminals. The communication method comprises the following steps: a first access signal is detected within a first time slot range based on a set of preamble sequences and/or a set of subchannels, the first access signal comprising a first preamble sequence and first data information.

Description

Signal detection method, signal transmission device and storage medium

Technical Field

The disclosure relates to the technical field of communication, and in particular relates to a signal detection method, a signal transmission device and a storage medium.

Background

In the passive internet of things communication technology, a random time slot-based anti-collision algorithm is adopted for checking, identifying, accessing and other processes of terminal equipment so as to avoid the time conflict of access signals sent among a plurality of terminal equipment. In the above process, the terminal randomly selects one time slot to transmit the access signal within one time slot range, and randomly selects different time slots between different terminal devices, so as to avoid the situation that the terminal collides when transmitting the access signal.

Nevertheless, there is still the possibility that multiple terminals may choose to the same slot. In case the number of terminal devices is larger than the number of time slots selectable in the time slot range, this possibility increases considerably. Therefore, how to reduce the collision probability of access signals of a plurality of terminals is a problem to be solved.

Disclosure of Invention

The embodiment of the disclosure provides a signal detection method, a signal transmission device and a storage medium, which are used for reducing the collision probability of access signals of a plurality of terminals.

In a first aspect, a signal detection method is provided, applied to a first node, including:

A first access signal is detected within a first time slot range based on a set of preamble sequences and/or a set of subchannels, the first access signal comprising a first preamble sequence and first data information.

In a second aspect, a signal sending method is provided, applied to a second node, and includes:

Transmitting a first access signal over a time slot within a first time slot range, the first access signal comprising a first preamble sequence and first data information; wherein the first access signal satisfies at least one of:

the first preamble sequence in the first access signal is one of a set of preamble sequences;

the sub-channel transmitting the first access signal is one sub-channel of a set of sub-channels.

In a third aspect, there is provided a communication apparatus comprising:

And the processing module is used for detecting a first access signal in a first time slot range based on the preamble sequence set and/or the subchannel set, wherein the first access signal comprises a first preamble sequence and first data information.

In a fourth aspect, there is provided a further communication device comprising:

a communication module, configured to transmit a first access signal on a time slot within a first time slot range, where the first access signal includes a first preamble sequence and first data information; wherein the first access signal satisfies at least one of:

the first preamble sequence in the first access signal is one of a set of preamble sequences;

the sub-channel transmitting the first access signal is one sub-channel of a set of sub-channels.

In a fifth aspect, a communication apparatus is provided, including a processor, where the processor implements the signal detection method of the first aspect or the signal transmission method of the second aspect when executing a computer program.

In a sixth aspect, there is provided a computer readable storage medium comprising computer instructions; wherein the computer instructions, when executed, implement the signal detection method of the first aspect described above, or implement the signal transmission method of the second aspect described above.

In the embodiment of the disclosure, when the second node transmits the first access signal, the collision probability of the first access signals of a plurality of second nodes can be reduced from multiple aspects of time domain, frequency domain and code domain by selecting a time slot in the first time slot range as a time slot for transmitting the first access signal, and selecting a preamble sequence in the preamble sequence set as a preamble sequence of the first access signal and/or selecting a subchannel in the subchannel set as a subchannel for transmitting the first access signal, so as to improve the access efficiency of the second node.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure, the drawings that need to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings may be obtained according to these drawings to those of ordinary skill in the art.

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the disclosure;

Fig. 2 is a schematic flow chart of a signal detection method according to an embodiment of the disclosure;

fig. 3 is a flowchart of another signal detection method according to an embodiment of the disclosure;

Fig. 4 is a flowchart of another signal detection method according to an embodiment of the disclosure;

fig. 5 is a schematic flow chart of a signal sending method according to an embodiment of the disclosure;

Fig. 6 is a flowchart of yet another signal transmission method according to an embodiment of the disclosure;

fig. 7 is a flowchart of yet another signal transmission method according to an embodiment of the disclosure;

fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the disclosure;

Fig. 9 is a schematic structural diagram of still another communication device according to an embodiment of the present disclosure;

Fig. 10 is a schematic structural diagram of another communication device according to an embodiment of the disclosure.

Detailed Description

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.

In the description of the present disclosure, unless otherwise indicated, "/" means "or" and, for example, a/B may mean a or B. "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Furthermore, "at least one" means one or more, and "a plurality" means two or more. The terms "first," "second," and the like do not limit the number and order of execution, and the terms "first," "second," and the like do not necessarily differ.

It is noted that in this disclosure, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "e.g." should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

At present, the passive internet of things is widely focused, and a passive terminal in the passive internet of things has the advantages of no need of an external power supply, strong adaptability, high reliability, high safety, low cost, simplicity and convenience in installation, good maintainability and the like, so that the passive terminal is widely applied in a plurality of fields. In the passive internet of things communication technology, a random time slot mode is adopted, so that the situation that a terminal collides when transmitting an access signal is avoided. However, in the random slot mode, the number of slots in the slot range is limited, and if the number of terminals exceeds the number of selectable slots in the slot range, a situation that a plurality of terminal devices select one slot and transmit an access signal on one slot still occurs.

Based on this, the embodiments of the present disclosure provide a signal detection method and a signal transmission method, when a second node transmits a first access signal, the collision probability of the first access signals of a plurality of second nodes may be reduced from multiple aspects of time domain, frequency domain and code domain, so as to improve the access efficiency of the second node, by selecting not only a time slot in the first time slot range as a time slot for transmitting the first access signal, but also a preamble sequence in the preamble sequence set as a preamble sequence of the first access signal and/or selecting a subchannel in the subchannel set as a subchannel for transmitting the first access signal.

The signal detection method and the signal transmission method provided by the present disclosure may be applied to a communication system as shown in fig. 1, and fig. 1 shows a schematic architecture diagram of a communication system provided by an embodiment of the present disclosure. As shown in fig. 1, the communication system includes a first node 10 and a second node 20.

In a wireless communication scenario, the first node 10 communicates with the second node 20 over a wireless channel. For example, the first node 10 is a base station, the second node 20 is a terminal, and communication is performed between the base station and the terminal through a wireless channel. For another example, the first node 10 is a terminal, the second node 20 is a wireless router, and the wireless router communicates with the terminal via a wireless channel. For another example, the first node 10 is a first base station, the second node 20 is a second base station, and the first base station and the second base station communicate through a wireless channel. For another example, the first node 10 is a first terminal, the second node 20 is a second terminal, and the first terminal and the second terminal communicate through a wireless channel. For another example, the first node 10 is a repeater and the second node 20 is a base station, the base station and the repeater communicating via a wireless channel. For another example, the first node 10 is a terminal, the second node 20 is a repeater, and the repeater communicates with the terminal via a wireless channel. For another example, the first node 10 is a first repeater and the second node 20 is a second repeater, the first repeater and the second repeater communicating over a wireless channel. For another example, the first node 10 is a base station, the second node 20 is a satellite, and the satellite communicates with the base station via a wireless channel. For another example, the first node 10 is a satellite and the second node 20 is a base station, which communicates with the satellite over a wireless channel. For another example, the first node 10 is a terminal and the second node 20 is a satellite, which communicates with the terminal via a wireless channel. For another example, the first node 10 is a satellite and the second node 20 is a terminal, the terminal communicating with the satellite over a wireless channel. As another example, the first node 10 is a ground device and the second node 20 is an aircraft, the aircraft communicating with the ground device over a wireless channel. As another example, the first node 10 is a first aircraft and the second node 20 is a second aircraft, the first aircraft and the second aircraft communicating over a wireless channel.

In the embodiment of the present disclosure, the first node 10 is mainly taken as a base station, and the second node 20 is taken as a terminal for illustration.

In some embodiments, the first node 10 is configured to provide wireless access services for a plurality of terminals. Specifically, one base station provides one service coverage area (also may be referred to as a cell). Terminals entering the area may communicate with the base station via wireless signals to thereby receive wireless access services provided by the base station.

In some embodiments, the first node 10 may be a long term evolution (long term evolution, LTE), a base station or evolved base station (evolutional node B, eNB or eNodeB) in long term evolution enhancement (long term evolution advanced, LTE-a), a base station device in a 5G network, or a base station in a future communication system, etc., which may include various macro base stations, micro base stations, home base stations, wireless remote, reconfigurable intelligent surface (reconfigurable intelligent surface, RIS), routers, wireless fidelity (WIRELESS FIDELITY, WIFI) devices, etc., various network side devices.

In some embodiments, the second node 20 may be a device with wireless transceiving capability, which may be deployed on land, including indoor or outdoor, hand-held, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal may be a mobile phone, a tablet (Pad), a computer with wireless transceiving function, 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 remote medical (remote medical), 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), etc. Embodiments of the present disclosure are not limited to application scenarios. A terminal may also be referred to as a User, user Equipment (UE), access terminal, UE unit, UE station, mobile station, remote terminal, mobile device, UE terminal, wireless communication device, UE agent, UE device, or the like, as embodiments of the present disclosure are not limited in this respect.

It should be noted that fig. 1 is merely an exemplary frame diagram, the number of devices included in fig. 1 is not limited, and names of the respective devices are not limited, and the communication system may include other devices, such as core network devices, in addition to the devices shown in fig. 1.

The application scenario of the embodiments of the present disclosure is not limited. The system architecture and the service scenario described in the embodiments of the present disclosure are for more clearly describing the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of a new service scenario, the technical solutions provided by the embodiments of the present disclosure are applicable to similar technical problems.

Fig. 2 is a schematic flow chart of a signal detection method provided by the present disclosure, and as shown in fig. 2, the signal detection method is applied to a first node, and includes the following steps:

S101, detecting a first access signal in a first time slot range based on a preamble sequence set and/or a subchannel set.

Wherein the first access signal comprises a first preamble sequence and first data information, the first preamble sequence being located before the first data information.

In some embodiments, the first preamble sequence is used for signal collision recognition and signal synchronization. Illustratively, the preamble sequences in the present disclosure may be m-sequences, random bit sequences, sequences of 0 and 1, etc. number distribution, ZC sequences, sequences encoded for predefined information, sequences generated by combining multiple sequences, etc. The sequences generated by the combination of the sequences can be a sequence generated by the combination of a washing wave sequence and a Manchester MANCHRSTER code, a sequence generated by the combination of a PN sequence and a wave sequence, a sequence generated by the combination of a pseudo-random ZC sequence and a wave sequence, and a sequence generated by the combination of a ZC sequence and a PN sequence.

The data information in the present disclosure may be a random bit sequence, for example, a sequence including 16 bits that may be randomly generated for the second node, or the data information may also include a part of information in an Identity (ID) of the second node. Or the data information may include other sequences or other information, which is not limited by the present disclosure.

In some embodiments, the preamble sequence of the first access signal is one of a set of preamble sequences.

The preamble sequence set comprises P preamble sequences and P positive integers.

As one possible implementation, the set of preamble sequences is predefined.

Wherein the set of preamble sequences is determined according to the second node type.

For example, each second node type corresponds to one preamble sequence set, and the preamble sequence sets corresponding to different second node types may be the same or different. For example, the second node type includes type a, type B, and type C. The second node of the second node type is a preamble sequence set U1 corresponding to a second node of the type a and the type B, the second node of the second node type is a preamble sequence set U2 corresponding to a second node of the type C, and the number of preamble sequences in the preamble sequence set U1 may be greater than or equal to or less than the number of preamble sequences in the preamble sequence set U2. Or the second nodes with the second node type of type A, type B and type C correspond to the preamble sequence set U1.

In the case that each second node type corresponds to one set of preamble sequences, the first node may determine the second node type based on the detected preamble sequences in the first access signal. For example, the second node type includes type a, type B, and type C. The second node type is a second node corresponding preamble sequence set U1 of the type A and the type B, and the second node type is a second node corresponding preamble sequence set U2 of the type C. If the preamble sequence detected by the first node is the preamble sequence in the preamble sequence set U1, determining that the second node type is type a or type B, and if the preamble sequence detected by the first node is the preamble sequence in the preamble sequence set U1, determining that the second node type is type C.

In some embodiments, the length of the preamble sequence in the first access signal and the second node type also have a correspondence. For example, the second node type includes type a, type B, and type C. The second node of the second node type A and the second node of the second node type B correspond to the first preamble sequence length, and the second node of the second node type C corresponds to the second node length. The first node may determine the second node type based on a length of the preamble sequence in the detected first access signal. If the length of the preamble sequence detected by the first node is the length of the first preamble sequence, the second node type is determined to be type A or type B, and if the length of the preamble sequence detected by the first node is the length of the second preamble sequence, the second node type is determined to be type C. If the length of the preamble sequence detected by the first node is the length of the first preamble sequence, the second node type is determined to be type A or type B, and if the length of the preamble sequence detected by the first node is the length of the second preamble sequence, the second node type is determined to be type C.

As another possible implementation, the set of preamble sequences is determined based on configuration parameters of the set of preamble sequences.

Wherein the configuration parameters of the preamble sequence include at least one of: cyclic shift value, preamble sequence number, preamble sequence length, preamble sequence set number.

In some embodiments, in case the configuration parameter of the preamble sequence set indicates a cyclic shift value of L, the preamble sequence set comprises K preamble sequences with cyclic shift values of L to l+k-1, respectively.

Wherein, L and K are both positive integers, K is the number of preamble sequences contained in the preamble sequence set, K is greater than or equal to 1, K may be a preset value, or may be set according to an actual application scenario, or may also be determined according to other manners, which is not limited in the disclosure.

Illustratively, taking a K value of 5 as an example, the configuration parameter of the preamble sequence set indicates a cyclic shift value L of 2, in which case the preamble sequence set comprises 5 preamble sequences with cyclic shift values of 2,3,4, 5, 6, respectively.

In some embodiments, in the case where the configuration parameter of the preamble sequence set indicates that the preamble sequence number is L, the preamble sequence set includes K preambles having preamble sequence numbers L to l+k-1, respectively.

Illustratively, taking a K value of 6 as an example, the configuration parameter of the preamble sequence set indicates a preamble sequence number of 3, in which case the preamble sequence set comprises 6 preambles with preamble sequence numbers of 3,4, 5, 6, 7, 8, respectively.

In some embodiments, in the case where K is a preset value, the first node may determine the second node type according to the K value.

Illustratively, the second node type includes type a, type B, and type C. The K value corresponding to the second node of the second node type a and the second node of the second node type B is a first value, the K value corresponding to the second node of the second node type C is a second value, and the first value may be greater than or less than the second value. And if the K value corresponding to the preamble sequence set corresponding to the preamble sequence of the first access signal detected by the first node is a second numerical value, determining that the second node type is type C.

In some embodiments, where the configuration parameter of the set of preamble sequences indicates a preamble sequence length of L, the set of preamble sequences includes one or more preamble sequences of data element number L. Wherein the preamble length is used to indicate the number of data elements that one preamble includes.

It should be noted that the preamble sequences have high auto-correlation and low cross-correlation, that is, the preamble sequences have orthogonal or near-orthogonal characteristics. The correlation value between two different preamble sequences is low and the correlation value between two identical preamble sequences is high. Therefore, when the first node detects the first access signal based on the preamble sequence set, if a higher correlation value is detected, the corresponding preamble sequence can be directly determined according to the correlation value.

In some embodiments, as shown in fig. 3, before the first node detects the first access signal in the first time slot range, the signal detection method further includes the steps of:

s100, sending a first message.

Wherein the first message comprises at least one of: configuration parameters of a first time slot range, configuration parameters of a preamble sequence set, configuration parameters of a subchannel set, first indication information, second indication information and third indication information;

the first indication information is used for indicating the second node type; the second indication information is used for indicating the type of the access signal; the third indication information is used for indicating the access mode.

Illustratively, the configuration parameter of the first slot range is used to determine the first slot range. The configuration parameter indicates a Q value, the first time slot range determined based on the configuration parameter is 0 to 2 ^Q -1, Q is an integer, and Q is greater than or equal to 0. For example, when the configuration parameter indicates that the Q value is 4, the first timeslot range determined based on the configuration parameter is 0 to 15, after the second node receives the first message, the first timeslot range may be determined to be 0 to 15 according to the configuration parameter 4 of the first timeslot range in the first message, and one timeslot is randomly selected in the first timeslot range to transmit the first access signal.

It should be noted that, the time slots are time units in the first time slot range. The duration between different time slots may be different. Illustratively, the first node may send slot decrement information for determining a beginning or an ending of a slot, and in particular, the slot decrement information indicates a previous slot ending or a subsequent slot beginning.

In another example, the configuration parameters of the preamble sequence set are used to determine the preamble sequence set, and their description may be described in detail above for the configuration parameters of the preamble sequence, which is not repeated here.

Still another exemplary configuration parameter of the set of subchannels is used to determine the set of subchannels. For example, if the configuration parameters of the subchannel set indicate F subchannel serial numbers, the subchannel set corresponding to the configuration parameters of the subchannel set is a set formed by subchannels with subchannel serial numbers of the above-mentioned F subchannel serial numbers. Or the configuration parameter of the subchannel set indicates that the subchannel set comprises F subchannels, the subchannel set comprises subchannels 0 to F-1, and F is a positive integer. After the second node receives the first message, the sub-channel set can be determined according to the configuration parameters of the sub-channel set in the first message, and one sub-channel is randomly selected from the sub-channel set to transmit the first access signal.

It should be understood that the sub-channel is a transmission band, and the measurement unit of the frequency domain width of the sub-channel may be a frequency domain unit such as a subcarrier, a physical resource block, or hertz. The frequency domain positions are different between different sub-channels, and the frequency domain bandwidths of the different sub-channels can be the same or different.

Still further exemplary, the first indication information is for indicating the second node type. For example, the second node type includes type a, type B and type C, the first indication information indicates that the second node of the second node type a sends a first access signal, and after the second node of the second node type a receives the first message, the second node determines that the second node needs to send the first access signal according to the first indication information in the first message.

It should be noted that, the first indication information is not only used for indicating the second node type, but also the first node can determine the preamble sequence set according to the second node type indicated in the first indication information, and detect the first access signal based on the preamble sequence set. As in the examples above, the second node type includes type a, type B, and type C. The second node type is a second node corresponding preamble sequence set U1 of the type A and the type B, and the second node type is a second node corresponding preamble sequence set U2 of the type C. For example, the first indication information indicates that the second node with the second node type being the type a sends the first access signal, the first node may determine that the preamble sequence set corresponding to the second node type is U1 according to the second node type indicated by the first indication information, and then the first node may detect the first access signal based on the preamble sequence set U1.

Still further exemplary, the second indication information is for indicating an access signal type, the signal type including a backscatter signal and an independently generated signal. For example, the second indication information indicates that the first access signal sent by the second node is a backscatter signal, and after the second node receives the first message, the second node determines that the access signal type of the first access signal is a backscatter signal according to the second indication information, and sends the first access signal whose access signal type is a backscatter signal.

It should be noted that different access signal types correspond to different preamble sequence sets. For example, the backscatter signal corresponds to the set of preamble sequences U1 and the signal corresponds to the set of preamble sequences U2 are generated independently. The access signal type indicated by the second indication information is a backscatter signal, and the first node may determine, according to the access signal type indicated by the second indication information, that a preamble sequence set corresponding to the access signal type is U1, and detect the first access signal based on the preamble sequence set U1.

In another example, the third indication information is used to indicate an access mode, where the access mode includes a first backscatter access mode, a second backscatter access mode, and an active communication access mode. For example, the first backscatter access mode includes a periodically triggered backscatter access, the second backscatter access mode includes a non-periodically triggered backscatter access, and the access modes supported by the second nodes of the different second node types may be the same or different. For example, the second node of the second node type a and B supports the first backscatter access mode, and the second node of the second node type C supports the second backscatter access mode and the active communication access mode. For another example, when the access mode indicated by the third indication information is the first backscatter access mode, after the second node supporting the second node types a and B of the first backscatter access mode receives the first message, it is determined that the second node needs to send the first access signal in the first backscatter access mode according to the third indication information in the first message.

It should be noted that different access modes correspond to different or same second node types, so that the second node types can be determined according to the access modes. And, the different second node types correspond to different preamble sequence sets, and the preamble sequence sets may be determined according to the third indication information. For example, as described in the examples above, the second node type includes type a, type B, and type C. The second node of the second node type A and the second node of the second node type B correspond to the preamble sequence set U1, the second node of the second node type C corresponds to the preamble sequence set U2, the second node of the second node type A and the second node of the second node type B support a first back scattering access mode, and the second node of the second node type C supports a second back scattering access mode and an active communication access mode. Taking the access mode indicated by the third indication information as an active communication access mode as an example, if only the second node of the second node type C supports the active communication access mode, the first node determines that a preamble set corresponding to the access mode is U2 according to the active communication node mode indicated by the third indication information, and detects the first access signal based on the preamble sequence set U2.

In this way, when the second node transmits the first access signal, the collision probability of the first access signals of the plurality of second nodes can be reduced from multiple aspects of time domain, frequency domain and code domain by selecting not only the time slot in the first time slot range as the time slot for transmitting the first access signal, but also the preamble sequence in the preamble sequence set as the preamble sequence of the first access signal and/or the sub-channel in the sub-channel set as the sub-channel for transmitting the first access signal, so as to improve the access efficiency of the second node.

In some embodiments, the first node detects the first access signal in the first time slot range based on the preamble sequence set and/or the subchannel set, and at least one of the following detection results occurs:

1. The first node detects a first access signal (i.e., detects a preamble of the first access signal) over a time slot within the first time slot range and correctly decodes the data information of the first access signal.

It should be noted that the detection result characterizes that only one second node selects the time slot to transmit the first access signal.

2. The first node does not detect the first access signal (i.e., does not detect the preamble sequence of the first access signal) over a time slot within the first range of time slots.

It should be noted that, the detection result indicates that no second node selects the timeslot to send the first access signal, and the timeslot is an idle transmission resource.

3. The first node detects N first access signals (i.e., detects the preamble sequences of the N first access signals) in one time slot within the first time slot range, where N is a positive integer.

It should be understood that, in the related art, among the access signals transmitted by the second nodes, different preamble sequences are orthogonal or approximately orthogonal, and the access signals transmitted by the plurality of second nodes use the same preamble sequence, or mutually orthogonal or approximately orthogonal preamble sequences, so that the first node can successfully detect the preamble sequences; the data information of the first access signal cannot be decoded correctly by the first node because the data information of the different access signals is different, which also means that a plurality of access signals collide, and the first node needs to retransmit the access signal so that the second node completes the access process.

In some embodiments, in a case where N first access signals are detected in one time slot in the first time slot range, or in a case where N first access signals are detected in one time slot in the first time slot range and data information of the N first access signals is not decoded correctly, the first node sends a second message to trigger the second node that sends the first access signals in the time slot to send the second access signals, and the first node detects the second access signals, as shown in fig. 4, the above process may be specifically implemented as the following steps:

s102, when N first access signals are detected in one time slot in the first time slot range, a second message is sent in the time slot.

Wherein the second message comprises at least one of: configuration parameters of the second time slot range, fourth indication information, fifth indication information and sixth indication information. The fourth indication information is used for indicating at least one first preamble sequence in the first preamble sequences contained in each of the N first access signals; the fifth indication information is used for indicating at least one sub-channel in sub-channels used by each of the N first access signals; the sixth indication information is used for indicating that the first node has detected the first preamble sequence; n is a positive integer.

The configuration parameter of the second time slot range is used to indicate the second time slot range, so that the second node transmitting the first access signal in the time slot randomly selects one time slot in the second time slot range to transmit the second access signal.

In still another example, the fourth indication information includes a first bitmap, the first bitmap includes K indication bits, each indication bit corresponds to one preamble sequence in the preamble sequence set, a value of the indication bit is used to indicate whether the preamble sequence corresponding to the indication bit is the first preamble sequence indicated by the fourth indication information, K is a number of preamble sequences included in the preamble sequence set, and K is a positive integer. For example, the preamble sequence set includes K preamble sequences, where each of the K preamble sequences corresponds to one indication bit in the first bitmap. The indication bit with the value of 1 is used for indicating that the preamble sequence corresponding to the indication bit is the first preamble sequence indicated by the fourth indication information. Taking 15 sequences in the preamble sequence set, corresponding to 15 indication bits in the first bitmap as an example. If the first bitmap is 0000000 0000 0001, the preamble sequence indicated by the fourth indication information is the 1 st preamble sequence in the preamble sequence set, if the first bitmap is 100 00000000 0001, the preamble sequence indicated by the fourth indication information is the 1 st preamble sequence and the 15 th preamble sequence in the preamble sequence set, and if the first bitmap is 0000000 1100 0010, the preamble sequence indicated by the fourth indication information is the 2 nd preamble sequence, the 7 th preamble sequence and the 15 th preamble sequence in the preamble sequence set.

In yet another example, the fourth indication information includes at least one first indication field, each for indicating one first preamble sequence. For example, the fourth indication information includes N first indication fields, N is a positive integer, N is less than or equal to N, and the value of N is determined according to the fourth indication information, or N is a fixed value. For another example, N is a fixed value of 1, and the fourth indication information is used to indicate one of the first preamble sequences included in each of the N first access signals. For another example, the fourth indication information includes an instruction index, where the instruction index corresponds to the number n of the first indication fields in the fourth indication information, for example, n corresponding to the instruction index I is a first value, and n corresponding to the instruction index J is a second value. In other embodiments, the fourth indication information includes an n-value indication field and n preamble sequence indication fields, where the n-value indication field is located before the n preamble sequence indication fields, and the value of n is determined by the n-value indication field.

It should be noted that, each first access signal uses one first preamble sequence, the N first access signals use M first preamble sequences, and M is less than or equal to N, that is, a plurality of access signals in the N first access signals use the same preamble sequence. The fourth indication information can indicate one first preamble sequence in the first preamble sequences included in each of the N first access signals, and the first node can respectively indicate the M first preamble sequences by sending the M fourth indication information. Or the fourth indication information is used for indicating N preamble sequences in the first preamble sequences included in each of the N first access signals, N is a positive integer, N is less than or equal to M, the number of the indicated first preamble sequences can be the same or different, the first node can indicate M first preamble sequences by sending k fourth indication information, k is a positive integer, and k is less than M. Taking M as 5 and k as 2 as an example, the first node transmits fourth indication information for 2 times, the fourth indication information transmitted for 1 st time indicates 3 preamble sequences in the 5 first preamble sequences, and the fourth indication information transmitted for 2 nd time indicates the remaining 2 preamble sequences in the 5 first preamble sequences. Or the fourth indication information can indicate all the first preamble sequences in the first preamble sequences contained in each of the N first access signals, and the first node only sends the fourth indication information once, so that all the first preamble sequences in the first preamble sequences contained in each of the N first access signals can be indicated.

Still further exemplary, the fifth indication information includes a second bitmap, the second bitmap includes P indication bits, each indication bit corresponds to one subchannel in the subchannel set, a value of the indication bit is used to indicate whether the subchannel corresponding to the indication bit is a subchannel indicated by the fifth indication information, P is a number of subchannels included in the subchannel set, and P is a positive integer. For example, the sub-channel set includes P sub-channels, and each sub-channel in the P sub-channels corresponds to one indication bit in the second bitmap. The indication bit with the value of 1 is used for indicating that the sub-channel corresponding to the indication bit is the sub-channel indicated by the fifth indication information. Taking the example that the sub-channel set includes 8 sub-channels, the 8 indicating bits in the second bitmap are respectively corresponding to the 8 sub-channels. If the second bitmap is 0000 0001, it indicates that the subchannel indicated by the fifth indication information is the 1 st subchannel in the subchannel set, and if the second bitmap is 0000 1001, it indicates that the subchannel indicated by the fifth indication information is the 1 st subchannel and the 4 th subchannel in the subchannel set.

In yet another example, the fifth indication information includes at least one second indication field, each of the second indication fields indicating one sub-channel. For example, when the value of the second indication field corresponds to the number of the subchannel indicated by the fifth indication information, that is, when the value of the second indication field is 2, the subchannel indicated by the fifth indication information is the subchannel with the number of 2.

It should be noted that, each first access signal transmission occupies one sub-channel, and the transmission of N first access signals occupies M sub-channels, where M is less than or equal to N, that is, the same sub-channel is used by a plurality of access signals in the N first access signals. The fifth indication information can indicate one of the sub-channels used by each of the N first access signals, and the first node can indicate the M sub-channels by transmitting the M fifth indication information, respectively. Or the fifth indication information is used for indicating the first N sub-channels in the sub-channels used by the N first access signals, N is a positive integer, N is less than or equal to M, and the number of the indicated sub-channels can be the same or different. The first node may indicate M subchannels by transmitting k fifth indication information, k being a positive integer, and k being less than M. Taking M as 5 and k as 2 as an example, the first node transmits 2 times of fifth indication information, the 1 st transmitted fifth indication information indicates 3 subchannels among the subchannels used by each of the 5 first access signals, and the 2 nd transmitted fifth indication information indicates the remaining 2 subchannels among the subchannels used by each of the 5 first access signals. Or the fifth indication information can indicate all sub-channels in the sub-channels used by the N first access signals, and the first node can indicate all sub-channels in the sub-channels used by the N first access signals only by sending the fifth indication information once.

In yet another example, the sixth indication information is for indicating that the first node has detected the first preamble sequence. For example, when the sixth instruction information is 1, the first node is instructed to detect the first preamble sequence, and when the second node transmitting the first access signal in the time slot receives the sixth instruction information, the second node transmits the second access signal.

In this way, when the first node fails to decode the data information of the first access signal due to the time slot conflict, the second node with the time slot conflict is triggered to send the second access signal by sending the second message, so as to decode the second access signal again, thereby improving the access efficiency and success rate of the second node.

S103, detecting a second access signal in a second time slot range.

Wherein the second access signal comprises a second preamble sequence and second data information.

As a possible implementation manner, the detection of the second access signal in the second time slot range may be specifically implemented as the following steps: the second access signal is detected within the second time slot based on at least one first preamble sequence indicated by the set of preamble sequences or the fourth indication information.

The first node may detect the second access signal within the second time slot based on a fixed preamble sequence of the set of preamble sequences. The first node may also detect the second access signal within the second time slot based on each preamble sequence in the set of preamble sequences. The first node may also detect the second access signal within the second time slot based on any of the set of preamble sequences and at least one first preamble sequence indicated by the fourth indication information.

As another possible implementation manner, the detection of the second access signal in the second time slot range may be specifically implemented as the following steps: the second access signal is detected within the second time slot based on at least one subchannel indicated by the set of subchannels or the fifth indication information.

Illustratively, the first node may detect the second access signal within the second time slot based on a fixed subchannel of the set of subchannels. The first node may also detect the second access signal within the second time slot based on each subchannel in the set of subchannels. The first node may also detect the second access signal within the second time slot based on the set of subchannels and any of the at least one first subchannel indicated by the fourth indication information.

The second time slot range is determined based on the configuration parameters of the second time slot range, for example, the maximum time slot value in the second time slot range is determined to be S-1 according to the configuration parameters of the second time slot range, and further the second time slot range is determined to be time slots 0 to S-1, and S is greater than or equal to 1. For another example, the second slot range is predefined and is a fixed slot range, such as slot 0 through slot 3. For another example, the second slot range is the same as the first slot range described above.

In yet another example, the second preamble sequence is a fixed preamble sequence of the set of preamble sequences, e.g., the second preamble sequence is a first preamble sequence of the set of preamble sequences, and the first node detects the second access signal based on the first preamble sequence of the set of preamble sequences. Or the second preamble sequence is a first preamble sequence indicated by fourth indication information, the first node detects the second access signal based on the first preamble sequence indicated by the fourth indication information, and the second preamble sequence is the first preamble sequence of the fourth indication information when the fourth indication information indicates a single first preamble sequence.

In this way, the plurality of second nodes use only the same preamble sequence designated when transmitting the second access signal, and the detection complexity can be reduced when the first node detects the preamble sequence.

In yet another example, the second preamble sequence is a randomly selected one of a set of preamble sequences, and the first node detects the second access signal based on the set of preamble sequences. In this way, the plurality of second nodes randomly select one preamble sequence in the preamble sequence set again, so that the plurality of preamble sequences in the preamble sequence set are selected and used, the first node can evaluate the number of the second nodes according to the number of the used preamble sequences in the preamble sequence set, and the number of the second nodes with collision is determined by utilization, so that the allocated transmission resources are effectively adjusted.

In another example, the second preamble sequence in the second access signal is the same as the first preamble sequence in the first access signal transmitted by the same second node, and the first node detects the second access signal based on the first preamble sequence indicated by the fourth indication information. Or the second access signal sent by the second node triggered by the second message adopts the same second preamble sequence.

In yet another example, the second message further includes indication information of a second preamble sequence, where the indication information is used to directly indicate the second preamble sequence, and the second preamble sequence is a preamble sequence indicated by the indication information of the second preamble sequence carried by the second message. Or the second message further comprises indication information of a preamble sequence set, the indication information is used for indicating one preamble sequence set, the second preamble sequence is one of the preamble sequence sets indicated by the indication information of the preamble sequence set carried by the second message, when the second node receives the second message, the corresponding preamble sequence set is determined according to the indication information of the preamble sequence set carried by the second message, and one preamble sequence is randomly selected from the preamble sequence set to serve as the second preamble sequence.

As a possible implementation manner, the detection of the second access signal in the second time slot range may be specifically implemented as the following steps: detecting the second access signal in a second time slot range on at least one sub-channel indicated by the fifth indication information; or detecting the second access signal in a second time slot range on a fixed subchannel in the subchannel set; or, on each subchannel within the set of subchannels, detecting the second access signal within a second time slot range.

In yet another example, the sub-channel transmitting the second access signal is a randomly selected one of a set of sub-channels within which the first node detects the second access signal. Or the subchannel transmitting the second access signal is a fixed subchannel of the set of subchannels, e.g., the subchannel transmitting the second access signal is the first subchannel of the set of subchannels, and the first node detects the second access signal on the first subchannel of the set of subchannels. Or the sub-channel for transmitting the second access signal is the first sub-channel indicated by the fifth indication information carried by the second message, and the first node detects the second access signal on the first sub-channel indicated by the fifth indication information. Or the sub-channel for transmitting the second access signal is the same as the sub-channel for transmitting the first access signal by the same second node, and the first node detects the second access signal on the sub-channel indicated by the fifth indication information. Or the second message further comprises indication information of the sub-channel, the indication information is used for directly indicating the sub-channel, and the sub-channel transmitting the second access signal is the sub-channel indicated by the indication information of the sub-channel carried by the second message. Or the second message further comprises indication information of a sub-channel set, the indication information of the first sub-channel set is used for indicating one sub-channel set, a sub-channel for transmitting the second access signal is one sub-channel in the sub-channel set indicated by the indication information of the sub-channel set carried by the second message, when the second node receives the second message, the sub-channel set is determined according to the indication information of the sub-channel set carried by the second message, and one sub-channel is randomly selected from the sub-channel set to be used as the sub-channel for transmitting the second access signal.

In some embodiments, the first node sends the access acknowledgement information after receiving the first access signal or the second node signal.

The access confirmation information is used for representing that the first node receives the first access signal or the second node signal, the access confirmation information comprises data information or information Message2 in the corresponding first access signal or second node signal, and the Message2 comprises basic information, network configuration information and the like of the first node.

In some embodiments, the physical uplink channel signal is received after the first node transmits the access acknowledgement information.

Wherein the physical uplink channel signal comprises a third preamble sequence and physical uplink channel data, the preamble sequence being located before the physical uplink channel data. The third preamble sequence is a fixed preamble sequence. Or the third preamble is one selected by the second node from a set of preambles, and illustratively, the set of preambles used by the third preamble is different from the set of preambles used by the first preamble or the second preamble. Or the third preamble sequence is a preamble sequence determined based on the cell ID corresponding to the second node. Or the third preamble is a preamble directly indicated by the first node.

Fig. 5 shows a flow chart of a signal transmission method provided by the present disclosure, and as shown in fig. 5, the signal transmission method is applied to a second node, and includes the following steps:

S201, a first access signal is sent on a time slot in a first time slot range.

Wherein the first access signal comprises a first preamble sequence and first data information, the first access signal satisfying at least one of: the first preamble sequence in the first access signal is one of a set of preamble sequences; the sub-channel transmitting the first access signal is one sub-channel of a set of sub-channels.

As one possible implementation, the set of preamble sequences is predefined.

Wherein the preamble sequence sets are determined according to second node types, one for each second node type.

As another possible implementation, the set of preamble sequences is determined based on configuration parameters of the set of preamble sequences.

Wherein the configuration parameters of the preamble sequence include at least one of: cyclic shift value, preamble sequence number, preamble sequence length, preamble sequence set number.

In some embodiments, in the case where the configuration parameter of the preamble sequence set indicates a cyclic shift value of L, the preamble sequence set includes K preamble sequences having cyclic shift values of L to l+k-1, respectively; or alternatively

In the case that the configuration parameter of the preamble sequence set indicates that the preamble sequence number is L, the preamble sequence set comprises K preamble sequences with the preamble sequence numbers of L to L+K-1 respectively; wherein, L and K are both positive integers, and K is the number of the preamble sequences contained in the preamble sequence set.

In some embodiments, before the second node transmits the first access signal on a time slot within the first time slot range, as shown in fig. 6, the signal transmission method further includes the steps of:

S200, receiving a first message.

Wherein a first message is received, the first message comprising at least one of: configuration parameters of a first time slot range, configuration parameters of a preamble sequence set, configuration parameters of a subchannel set, first indication information, second indication information and third indication information; the first indication information is used for indicating the second node type; the second indication information is used for indicating the type of the access signal; the third indication information is used for indicating the access mode.

After receiving the first message, the second node determines a first time slot range according to a configuration parameter of the first time slot range carried by the first message, and randomly selects one time slot in the first time slot range to send the first access signal.

In yet another example, after receiving the first message, the second node determines a preamble sequence set according to the configuration of the preamble sequence set carried by the first message, and randomly selects one preamble sequence in the preamble sequence set as the preamble sequence of the first access signal.

In another example, after receiving the first message, the second node determines a subchannel set according to a configuration parameter of the subchannel set carried by the first message, and randomly selects one subchannel in the subchannel set as a subchannel for transmitting the first access signal.

In this way, when the second node transmits the first access signal, the collision probability of the first access signals of the plurality of second nodes can be reduced from multiple aspects of time domain, frequency domain and code domain by selecting not only the time slot in the first time slot range as the time slot for transmitting the first access signal, but also the preamble sequence in the preamble sequence set as the preamble sequence of the first access signal and/or the sub-channel in the sub-channel set as the sub-channel for transmitting the first access signal, so as to improve the access efficiency of the second node.

Still further exemplary, the first indication information is for indicating the second node type. And after receiving the first indication information, the second node sends a first access signal if the type of the second node belongs to the second node type indicated by the first indication information. Wherein in some examples, the second node determines a set of preamble sequences according to the second node type, one of the set of preamble sequences being selected as a first preamble sequence of the first access signal; or the second node determines a subchannel set according to the second node type, and selects one subchannel from the subchannel set to transmit the first access signal.

Still further exemplary, the second indication information is for indicating an access signal type, the signal type including a backscatter signal and an independently generated signal. And after receiving the second indication information, the second node sends the first access signal if the access signal type of the second node belongs to the access signal type indicated by the second indication information. Wherein in some examples, the second node determines a set of preamble sequences according to the access signal type, and selects one of the set of preamble sequences as a first preamble sequence of the first access signal; or the second node determines a subchannel set according to the type of the access signal, and selects one subchannel from the subchannel set to transmit the first access signal.

In another example, the third indication information is used to indicate an access mode, where the access mode includes a first backscatter access mode, a second backscatter access mode, and an active communication access mode. For example, the first backscatter access mode includes a periodic backscatter access mode, the second backscatter access mode includes a non-periodic backscatter access mode, and the access modes supported by the second nodes of different second node types may be the same or different. After receiving the third indication information, the second node sends a first access signal if the access mode of the second node belongs to the access mode indicated by the third indication information. Wherein, in some examples, the second node determines a preamble sequence set according to the access mode, and selects one preamble sequence in the preamble sequence set as a first preamble sequence of the first access signal; or the second node determines a subchannel set according to the access mode, and selects one subchannel from the subchannel set to transmit the first access signal.

In some embodiments, in the case that the first access signal of the second node collides, the second node needs to retransmit the access signal, so that the first node correctly decodes the data information in the access signal, as shown in fig. 7, the above process may be specifically implemented as the following steps:

s202, receiving a second message.

In some embodiments, the second message is used to trigger a second node that transmits the first access signal on one time slot to transmit the second access signal.

In some embodiments, the second message includes at least one of: configuration parameters of a second time slot range, fourth indication information, fifth indication information and sixth indication information; the fourth indication information is used for indicating at least one first preamble sequence in the first preamble sequences contained in each of the N first access signals detected by the first node on one time slot in the first time slot range; the fifth indication information is used for indicating at least one sub-channel in sub-channels used by the N first access signals respectively; the sixth indication information is for indicating that the first node has detected the first preamble sequence.

The fourth indication information comprises a first bitmap, the first bitmap comprises K indication bits, each indication bit corresponds to one preamble sequence in the preamble sequence set, the value of each indication bit is used for indicating whether the preamble sequence corresponding to the indication bit is the first preamble sequence indicated by the fourth indication information, K is the number of the preamble sequences contained in the preamble sequence set, and K is a positive integer. Or the fourth indication information comprises at least one first indication field, each for indicating one first preamble sequence.

The fifth indication information comprises a second bitmap, wherein the second bitmap comprises P indication bits, and each indication bit corresponds to one subchannel in the subchannel set; the value of the indicating bit is used for indicating whether the sub-channel corresponding to the indicating bit is the sub-channel indicated by the fifth indicating information, P is the number of sub-channels contained in the sub-channel set, and P is a positive integer. Or the fifth indication information includes at least one second indication field, each for indicating one sub-channel.

And S203, under the condition that the preset condition is met, transmitting a second access signal on one time slot in the second time slot range.

As a possible implementation manner, the second access signal is determined to be transmitted in case the second message satisfies a preset condition.

Wherein the preset conditions include any one of the following:

After a first access signal is sent in a time slot in a first time slot range, a second message is received in the time slot, and at least one first preamble sequence indicated by fourth indication information carried by the second message comprises a first preamble sequence of the first access signal; after a first access signal is sent in a time slot in a first time slot range, a second message is received in the time slot, and at least one sub-channel indicated by fifth indication information carried by the second message comprises a sub-channel for transmitting the first access signal; after the first access signal is sent in one time slot in the first time slot range, a second message is received in the time slot, and the second message carries sixth indication information.

In an exemplary embodiment, when the preset condition is met, the second node sends the second access signal on a time slot within the second time slot range, including at least three cases:

In the first case, after the second node sends the first access signal in the time slot within the first time slot range, if the second message is received in the time slot, and the first preamble sequence indicated by the fourth indication information carried by the second message includes the first preamble sequence of the first access signal sent by the second node, the second access signal is sent in one time slot within the second time slot range.

And a second case: after the second node sends the first access signal in the time slot in the first time slot range, if the second message is received in the time slot, and the sub-channel indicated by the fifth indication information carried by the second message comprises the sub-channel for the second node to transmit the first access signal, the second access signal is sent in one time slot in the second time slot range.

And a third case: after the second node sends the first access signal in the time slot in the first time slot range, if the second message is received in the time slot and carries the sixth indication information, the second node sends the second access signal in one time slot in the second time slot range.

As another possible implementation, in case the second message indicates to send the second access signal, it is determined to send the second access signal.

For example, the second message may directly indicate whether to send the second access signal. In the case that the second message directly indicates whether to transmit the second node signal, the second node may directly determine whether to transmit the second access signal according to the indication content of the second message.

Wherein the second access signal comprises a second preamble sequence and second data information.

In some embodiments, the second time slot range is determined based on configuration parameters of the second time slot range; or the second time slot range is predefined; or the second time slot range is the same as the first time slot range.

The second time slot range may be predefined, for example, the second time slot range may be a fixed time slot range to which the second message corresponds. Or determining a second time slot range based on the configuration parameters of the second time slot range carried by the second message; or the second time slot range is the same as the first time slot range.

In some embodiments, the second preamble sequence is a fixed preamble sequence of the set of preamble sequences described above, e.g., the first preamble sequence of the set of preamble sequences; or the second preamble sequence is the first preamble sequence indicated by the fourth indication information, and the second preamble sequence is the first preamble sequence of the fourth indication information under the condition that the fourth indication information indicates a single first preamble sequence; or the second preamble sequence is one randomly selected from the preamble sequence set; or the second preamble sequence in the second access signal is the same as the first preamble sequence in the first access signal transmitted by the same second node.

In some embodiments, the subchannel over which the second access signal is transmitted is a randomly selected one of a set of subchannels; or the sub-channel transmitting the second access signal is a fixed sub-channel of the sub-channel set, for example, the first sub-channel of the sub-channel set; or the sub-channel for transmitting the second access signal is the first sub-channel indicated by the fifth indication information carried by the second message; or the sub-channel transmitting the second access signal is the same as the sub-channel transmitting the first access signal transmitted by the same second node.

In this way, under the condition that the first node fails to decode the data information of the first access signal due to the time slot conflict, the second node continues to send the second access signal, so that the first node continues to decode the second access signal, and the access efficiency and the success rate of the second node are improved.

As a possible implementation, the second node sends the second access signal based on the second message.

Illustratively, the second node determines a second time slot range based on a configuration parameter of the second time slot range carried by the second message, and randomly selects one time slot in the second time slot range to transmit the second access signal. The second node determines a second preamble sequence of the second access signal based on fourth indication information carried by the second message. The second node determines a subchannel for transmitting the second access signal based on the fifth indication information carried by the second message.

In some embodiments, the above method further comprises: and receiving access confirmation information.

The access confirmation information is used for representing that the first node receives the first access signal or the second node signal, the access confirmation information comprises data information or information Message2 in the corresponding first access signal or second node signal, and the Message2 comprises basic information, network configuration information and the like of the first node.

In some embodiments, the physical uplink channel signal is transmitted in case the access acknowledgement information is received by the second node.

Wherein the physical uplink channel signal comprises a third preamble sequence and physical uplink channel data, the preamble sequence being located before the physical uplink channel data. The third preamble sequence is a fixed preamble sequence. Or the third preamble is one selected by the second node from a set of preambles, and illustratively, the set of preambles used by the third preamble is different from the set of preambles used by the first preamble or the second preamble. Or the third preamble sequence is a preamble sequence determined based on a cell Identity (ID) corresponding to the second node. Or the third preamble is a preamble directly indicated by the first node.

It will be appreciated that the communication device, in order to achieve the above-described functions, comprises corresponding hardware structures and/or software modules performing the respective functions. Those of skill in the art will readily appreciate that the algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination 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 disclosure.

The embodiment of the disclosure may divide the functional modules of the communication device according to the embodiment of the method described above, for example, each functional module may be divided for each function, or two or more functions may be integrated into one functional module. The integrated modules may be implemented in hardware or software. It should be noted that, in the embodiment of the present disclosure, the division of the modules is merely a logic function division, and other division manners may be implemented in actual practice. The following description will take an example of dividing each function module into corresponding functions.

Fig. 8 is a schematic structural diagram of a communication device applied to a first node according to an embodiment of the present disclosure, where the communication device 80 may perform the signal detection method provided in the foregoing method embodiment. As shown in fig. 8, the communication device 80 includes a processing module 801.

A processing module 801 is configured to detect a first access signal within a first time slot range based on a preamble sequence set and/or a subchannel set, where the first access signal includes a first preamble sequence and first data information.

In some embodiments, the set of preamble sequences is predefined; or the set of preamble sequences is determined based on configuration parameters of the set of preamble sequences.

In some embodiments, the configuration parameters of the preamble sequence set include at least one of: cyclic shift value, preamble sequence number, preamble sequence length, preamble sequence set number.

In some embodiments, in the case where the configuration parameter of the preamble sequence set indicates a cyclic shift value of L, the preamble sequence set includes K preamble sequences having cyclic shift values of L to l+k-1, respectively; or under the condition that the configuration parameter of the preamble sequence set indicates that the preamble sequence number is L, the preamble sequence set comprises K preamble sequences with the preamble sequence numbers of L to L+K-1 respectively; wherein, L and K are both positive integers, and K is the number of the preamble sequences contained in the preamble sequence set.

In some embodiments, the set of preamble sequences is predefined, comprising: the set of preamble sequences is determined according to the second node type.

In some embodiments, each second node type corresponds to a set of preamble sequences.

In some embodiments, the communication device 80 further includes a communication module 802 configured to send a first message, where the first message includes at least one of: configuration parameters of a first time slot range, configuration parameters of a preamble sequence set, configuration parameters of a subchannel set, first indication information, second indication information and third indication information; the first indication information is used for indicating the second node type; the second indication information is used for indicating the type of the access signal; the third indication information is used for indicating the access mode.

In some embodiments, the communication module 802 is further configured to send the second message on a time slot in a case where N first access signals are detected on one time slot in the first time slot range, where N is a positive integer.

In some embodiments, the second message is used to trigger a second node that transmits the first access signal over a time slot to transmit the second access signal.

In some embodiments, the second message includes at least one of: configuration parameters of a second time slot range, fourth indication information, fifth indication information and sixth indication information; the fourth indication information is used for indicating at least one first preamble sequence in the first preamble sequences contained in each of the N first access signals; the fifth indication information is used for indicating at least one sub-channel in sub-channels used by each of the N first access signals; the sixth indication information is used for indicating that the first node has detected the first preamble sequence, and N is a positive integer.

In some embodiments, the four indication information includes a first bitmap, where the first bitmap includes K indication bits, each indication bit corresponds to one preamble sequence in the preamble sequence set, a value of the indication bit is used to indicate whether the preamble sequence corresponding to the indication bit is the first preamble sequence indicated by the first indication information, K is a number of preamble sequences included in the preamble sequence set, and K is a positive integer.

In some embodiments, the fourth indication information comprises at least one first indication field, each for indicating one of the first preamble sequences indicated by the fourth indication information.

In some embodiments, the fifth indication information comprises a second bitmap comprising P indication bits, each indication bit corresponding to one subchannel of the set of subchannels; the value of the indicating bit is used for indicating whether the sub-channel corresponding to the indicating bit is the sub-channel indicated by the fifth indicating information, P is the number of sub-channels contained in the sub-channel set, and P is a positive integer.

In some embodiments, the fifth indication information includes at least one second indication field, each second indication field for indicating one sub-channel indicated by the fifth indication information.

In some embodiments, the processing module 801 is further configured to detect a second access signal within a second time slot, where the second access signal includes a second preamble sequence and second data information.

In some embodiments, the second time slot range is determined based on configuration parameters of the second time slot range; or the second time slot range is predefined; or the second time slot range is the same as the first time slot range.

In some embodiments, the processing module 801 is specifically configured to: the second access signal is detected within the second time slot based on at least one first preamble sequence indicated by the set of preamble sequences or the fourth indication information.

In some embodiments, the processing module 801 is specifically configured to: the second access signal is detected within the second time slot based on at least one subchannel indicated by the set of subchannels or the fifth indication information.

Fig. 9 is a schematic structural diagram of a communication device applied to a second node according to an embodiment of the present disclosure, where the communication device 90 may perform the signal transmission method provided in the foregoing method embodiment. As shown in fig. 9, the communication apparatus 90 includes a transmission module 901.

A transmitting module 901, configured to transmit a first access signal on a time slot within a first time slot range, where the first access signal includes a first preamble sequence and first data information; wherein the first access signal satisfies at least one of: the first preamble sequence in the first access signal is one of a set of preamble sequences; the sub-channel transmitting the first access signal is one sub-channel of a set of sub-channels.

In some embodiments, the communication apparatus 90 further includes a receiving module 902 configured to receive a first message, where the first message includes at least one of: configuration parameters of a first time slot range, configuration parameters of a preamble sequence set, configuration parameters of a subchannel set, first indication information, second indication information and third indication information; the first indication information is used for indicating the second node type; the second indication information is used for indicating the type of the access signal; the third indication information is used for indicating the access mode.

In some embodiments, the receiving module 902 is configured to receive a second message, the second message including at least one of: configuration parameters of a second time slot range, fourth indication information, fifth indication information and sixth indication information; the fourth indication information is used for indicating at least one first preamble sequence in the first preamble sequences respectively contained in the N first access signals detected by the first node on one time slot in the first time slot range; the fifth indication information is used for indicating at least one sub-channel in sub-channels used by each of the N first access signals; the sixth indication information is for indicating that the first node has detected the first preamble sequence.

In some embodiments, the sending module 901 is specifically configured to: under the condition that a preset condition is met, a second access signal is sent on one time slot in the second time slot range; wherein the second access signal comprises a second preamble sequence and second data information; the preset conditions include any one of the following: after a first access signal is sent in a time slot in a first time slot range, a second message is received in the time slot, and at least one first preamble sequence indicated by fourth indication information carried by the second message comprises a first preamble sequence of the first access signal; after a first access signal is sent in a time slot in a first time slot range, a second message is received in the time slot, and at least one sub-channel indicated by fifth indication information carried by the second message comprises a sub-channel for transmitting the first access signal; after a first access signal is sent in a time slot in a first time slot range, a second message is received in the time slot, and the second message carries the sixth indication information.

In some embodiments, the second preamble sequence is a first one of the at least one first preamble sequence indicated by the fourth indication information; or the second preamble sequence in the second access signal is the same as the first preamble sequence in the first access signal sent by the same second node; or the second preamble sequence is a randomly selected one of the preamble sequence sets; or the second preamble sequence is a fixed preamble sequence of the set of preamble sequences.

In some embodiments, the sub-channel on which the second access signal is transmitted is the same as the sub-channel on which the same second node transmits the first access signal; or the sub-channel transmitting the second access signal is the first sub-channel in the at least one sub-channel indicated by the fifth indication information; or the sub-channel for transmitting the second access signal is the first sub-channel in the sub-channel set; or the sub-channel for transmitting the second access signal is one sub-channel randomly selected by the second node from the sub-channel set.

In some embodiments, the second time slot range is determined based on configuration parameters of the second time slot range; or the second time slot range is predefined; or the second time slot range is the same as the first time slot range.

In the case where the functions of the above-described integrated modules are implemented in the form of hardware, the embodiments of the present disclosure provide another possible structure of the communication apparatus referred to in the above-described embodiments. As shown in fig. 10, the communication device 100 includes: processor 1002, bus 1004. Optionally, the communication device may further comprise a memory 1001; optionally, the communication device 100 may further comprise a communication interface 1003.

The processor 1002 may be any means for implementing or executing the various exemplary logic blocks, modules, and circuits described in connection with embodiments of the disclosure. The processor 1002 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with embodiments of the disclosure. The processor 1002 may also be a combination of computing functions, e.g., including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

Communication interface 1003 is used to connect with other devices through a communication network. The communication network may be an ethernet, a radio access network, a wireless local area network (wireless local area networks, WLAN), etc.

Memory 1001, which may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that may store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), magnetic disk storage or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

As a possible implementation, the memory 1001 may exist separately from the processor 1002, and the memory 1001 may be connected to the processor 1002 through the bus 1004, for storing instructions or program code. The processor 1002, when calling and executing instructions or program code stored in the memory 1001, is capable of implementing the signal detection method or the signal transmission method provided by the embodiments of the present disclosure.

In another possible implementation, the memory 1001 may also be integrated with the processor 1002.

Bus 1004, which may be an extended industry standard architecture (extended industry standard architecture, EISA) bus, or the like. The bus 1004 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in fig. 10, but not only one bus or one type of bus.

Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) having stored therein computer program instructions that, when run on a computer, cause the computer to perform a signal detection method or a signal transmission method as in any of the above embodiments.

By way of example, the computer-readable storage media described above can include, but are not limited to: magnetic storage devices (e.g., hard Disk, floppy Disk or tape, etc.), optical disks (e.g., compact Disk (CD), digital versatile Disk (DIGITAL VERSATILE DISK, DVD), etc.), smart cards, and flash Memory devices (e.g., erasable programmable read-Only Memory (EPROM), card, stick, or key drive, etc.). Various computer-readable storage media described in this disclosure may represent one or more devices and/or other machine-readable storage media for storing information. The term "machine-readable storage medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The disclosed embodiments provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the signal detection method or the signal transmission method as described in any of the above embodiments.

The foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any changes or substitutions within the technical scope of the disclosure should be covered by the protection scope of the disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims (27)

1. A signal detection method, applied to a first node, the method comprising:

a first access signal is detected within a first time slot range based on a set of preamble sequences and/or a set of subchannels, the first access signal comprising a first preamble sequence and first data information.

2. The method of claim 1, wherein the set of preamble sequences is predefined; or the set of preamble sequences is determined based on configuration parameters of the set of preamble sequences.

3. The method of claim 2, wherein the configuration parameters of the set of preamble sequences comprise at least one of: cyclic shift value, preamble sequence number, preamble sequence length, preamble sequence set number.

4. The method of claim 3, wherein the step of,

In the case that the configuration parameter of the preamble sequence set indicates that the cyclic shift value is L, the preamble sequence set includes K preamble sequences of which the cyclic shift values are L to l+k-1, respectively; or alternatively

In the case that the configuration parameter of the preamble sequence set indicates that the preamble sequence number is L, the preamble sequence set includes K preamble sequences with the preamble sequence numbers of L to l+k-1, respectively; wherein, L and K are both positive integers, and K is the number of the preamble sequences contained in the preamble sequence set.

5. The method of claim 2, wherein the set of preamble sequences is predefined, comprising: the set of preamble sequences is determined according to a second node type.

6. The method of claim 5, wherein each second node type corresponds to a set of preamble sequences.

7. The method of claim 1, wherein prior to said detecting the first access signal within the first time slot range, the method further comprises:

Transmitting a first message, the first message comprising at least one of: the configuration parameters of the first time slot range, the configuration parameters of the preamble sequence set, the configuration parameters of the subchannel set, the first indication information, the second indication information and the third indication information; the first indication information is used for indicating a second node type; the second indication information is used for indicating the type of the access signal; the third indication information is used for indicating an access mode.

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

and in the case that N first access signals are detected on one time slot in the first time slot range, sending a second message on the time slot, wherein N is a positive integer.

9. The method of claim 8, wherein the second message is used to trigger a second node that transmits the first access signal over the time slot to transmit a second access signal.

10. The method of claim 8, wherein the second message comprises at least one of: configuration parameters of a second time slot range, fourth indication information, fifth indication information and sixth indication information; wherein the fourth indication information is used for indicating at least one first preamble sequence in the first preamble sequences contained in each of the N first access signals; the fifth indication information is used for indicating at least one sub-channel in sub-channels used by the N first access signals respectively; the sixth indication information is used for indicating that the first node has detected the first preamble sequence, and N is a positive integer.

11. The method of claim 10, wherein the fourth indication information comprises a first bitmap, the first bitmap comprising K indication bits, each indication bit corresponding to one of the preamble sequences in the preamble sequence set, the indication bit having a value for indicating whether the preamble sequence corresponding to the indication bit is the first preamble sequence indicated by the fourth indication information, K being a number of preamble sequences included in the preamble sequence set, and K being a positive integer.

12. The method of claim 10, wherein the fourth indication information comprises at least one first indication field, each of the first indication fields being for indicating a first preamble sequence.

13. The method of claim 10, wherein the fifth indication information comprises a second bitmap comprising P indication bits, each of the indication bits corresponding to one of the set of subchannels; the indication bit is used for indicating whether the sub-channel corresponding to the indication bit is the sub-channel indicated by the fifth indication information, P is the number of sub-channels contained in the sub-channel set, and P is a positive integer.

14. The method of claim 10, wherein the fifth indication information comprises at least one second indication field, each of the second indication fields being for indicating one subchannel.

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

a second access signal is detected within a second time slot, the second access signal including a second preamble sequence and second data information.

16. The method of claim 15, wherein the second time slot range is determined based on configuration parameters of the second time slot range; or the second time slot range is predefined; or the second time slot range is the same as the first time slot range.

17. The method of claim 15, wherein detecting the second access signal in the second time slot range comprises:

the second access signal is detected within the second time slot based on at least one first preamble sequence indicated by the set of preamble sequences or the fourth indication information.

18. The method of claim 16, wherein detecting the second access signal in the second time slot range comprises:

The second access signal is detected within the second time slot based on the set of subchannels or at least one subchannel indicated by the fifth indication information.

19. A method of signaling, applied to a second node, the method comprising:

Transmitting a first access signal over a time slot within a first time slot range, the first access signal comprising a first preamble sequence and first data information; wherein the first access signal satisfies at least one of:

the first preamble sequence in the first access signal is one preamble sequence in a preamble sequence set;

the sub-channel transmitting the first access signal is one sub-channel in a set of sub-channels.

20. The method of claim 19, wherein prior to transmitting the first access signal on the one time slot within the first time slot range, the method further comprises:

Receiving a first message, the first message comprising at least one of: the configuration parameters of the first time slot range, the configuration parameters of the preamble sequence set, the configuration parameters of the subchannel set, the first indication information, the second indication information and the third indication information; the first indication information is used for indicating a second node type; the second indication information is used for indicating the type of the access signal; the third indication information is used for indicating an access mode.

21. The method of claim 19, wherein the method further comprises:

Receiving a second message, the second message comprising at least one of: configuration parameters of a second time slot range, fourth indication information, fifth indication information and sixth indication information; the fourth indication information is used for indicating at least one first preamble sequence in first preamble sequences contained in each of the N first access signals detected by the first node on one time slot in the first time slot range; the fifth indication information is used for indicating at least one sub-channel in sub-channels used by the N first access signals respectively; the sixth indication information is used to indicate that the first node has detected the first preamble sequence.

22. The method of claim 21, wherein the method further comprises:

Under the condition that a preset condition is met, a second access signal is sent on one time slot in the second time slot range; wherein the second access signal comprises a second preamble sequence and second data information; the preset conditions include any one of the following:

after a first access signal is sent in a time slot in a first time slot range, a second message is received in the time slot, and at least one first preamble sequence indicated by fourth indication information carried by the second message comprises a first preamble sequence of the first access signal;

After a first access signal is sent in a time slot in a first time slot range, a second message is received in the time slot, and at least one sub-channel indicated by fifth indication information carried by the second message comprises a sub-channel for transmitting the first access signal;

After a first access signal is sent in a time slot in a first time slot range, a second message is received in the time slot, and the second message carries the sixth indication information.

23. The method of claim 22, wherein the second preamble sequence is a first one of the at least one first preamble sequence indicated by the fourth indication information; or alternatively

The second preamble sequence in the second access signal is the same as the first preamble sequence in the first access signal sent by the same second node; or alternatively

The second preamble sequence is a randomly selected preamble sequence in the preamble sequence set; or alternatively

The second preamble sequence is a fixed preamble sequence in the preamble sequence set.

24. The method of claim 22, wherein the sub-channel on which the second access signal is transmitted is the same as the sub-channel on which the same second node transmits the first access signal; or alternatively

Transmitting a sub-channel of the second access signal as a first sub-channel of at least one sub-channel indicated by the fifth indication information; or alternatively

Transmitting the sub-channel of the second access signal as the first sub-channel in the sub-channel set; or alternatively

The sub-channel for transmitting the second access signal is a sub-channel randomly selected by the second node from the sub-channel set.

25. The method of claim 22, wherein the second time slot range is determined based on configuration parameters of the second time slot range; or the second time slot range is predefined; or the second time slot range is the same as the first time slot range.

26. A communication device comprising a processor which when executing a computer program implements the signal detection method of any one of claims 1 to 18 or implements the signal transmission method of any one of claims 19 to 25.

27. A computer-readable storage medium, the computer-readable storage medium comprising computer instructions; wherein the computer instructions, when executed, implement the signal detection method of any one of claims 1 to 18, or the signal transmission method of any one of claims 19 to 25.