Communication method and device

Abstract

A communication method and apparatus, belonging to the technical field of communications, in the method, M reference signals are segmentally indicated by information (such as first information) obtained by a terminal through error correction coding. When a terminal sends M reference signals to a network device on a scheduling-free resource, the M reference signals may change due to interference between different users when received by the network device. However, the indication information of the reference signals is obtained through error correction coding, so that the network equipment determines the information used for indicating the reference signals according to the received reference signals, and performs error correction decoding on the information so as to recover and obtain the first information. Therefore, the network equipment can decode the scheduling-free transmission through the first information, so that decoding can still be performed when pilot frequency resources of different users for the scheduling-free transmission have conflicts.

Description

Communication method and device Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0002] Scheduling-free / grant-free (GF) transmission may be one of the transmission solutions used to reduce transmission latency in the future. The common feature of scheduling-free transmission is that before uplink transmission, the terminal does not need to monitor the base station's dynamic grant to obtain the time-frequency resources and transmission parameters used to send data. Instead, it uses pre-configured time-frequency resources and transmission parameters to send data to the base station. These pre-configured time-frequency resources and transmission parameters are usually configured by the base station through high-level signaling, such as system information (SI) or user equipment (UE)-specific radio resource control (RRC) signaling.

[0003] It can be seen that scheduling-free transmission can omit the signaling overhead and delay caused by dynamic authorization, thereby improving transmission efficiency. However, since it is pre-configured, multiple users often share pre-configured resources. When multiple users need to transmit data at the same time, resource competition will occur between users, thus affecting user data transmission. For example, when the pilot resources used for scheduling-free transmission by different users conflict, the network side may not be able to distinguish these users, and decoding will not be possible.

[0004] Summary of the Invention

[0005] Embodiments of the present application provide a communication method and apparatus, so that when pilot resources used for scheduling-free transmission by different users conflict, the network can still implement decoding.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, a communication method is provided, comprising: obtaining first information through error correction coding and determining M indication information. The M indication information is used to indicate M reference signals corresponding to non-scheduled resources; the M indication information corresponds one-to-one to M segments, where the M segments are obtained by dividing the first information into M segments, where M is an integer greater than 1. In this manner, the M reference signals can be sent on the non-scheduled resources based on the M indication information.

[0008] It is understood that the method described in the first aspect can be executed by a terminal, a device including a terminal, or a chip in the terminal, without limitation. For ease of description, the following description will take the method executed by a terminal as an example.

[0009] In one possible design, obtaining the first information through error correction coding includes: obtaining the first information by performing error correction coding on the first sequence to be encoded. For example, the error correction coding may include at least one of the following: linear channel error correction coding, nonlinear channel error correction coding, or parity coding. In other words, the error correction coding may be a single error correction coding, such as linear channel error correction coding or nonlinear channel error correction coding, which has relatively low coding complexity and requires relatively low overhead. Alternatively, the error correction coding may be a cascade of multiple error correction coding steps, which has higher coding complexity and stronger error correction capabilities.

[0010] Optionally, obtaining the first information by performing error correction coding on the first sequence to be encoded includes: performing error correction coding on the first sequence to be encoded according to configuration parameters required for the error correction coding to obtain the first information. For example, the configuration parameters may be used to indicate at least one of the following: a format of the sequence to be encoded, such as an encoding input length, or a format of information obtained by the error correction coding, such as an encoding output length.

[0011] It can be understood that the coding input length and coding output length can be pre-aligned between the terminal and the network device. The terminal performs error correction coding according to the configuration information, such as the established coding input length and coding output length, to avoid decoding failure due to coding format errors.

[0012] Optionally, the method described in the first aspect may further include: receiving a first sequence to be encoded to avoid processing overhead caused by self-determination, or determining the first sequence to be encoded by itself to avoid generating additional communication overhead.

[0013] Furthermore, determining the sequence to be encoded includes determining a sequence corresponding to the data to be sent as a first sequence to be encoded, so as to implement data transmission by multiplexing a reference signal and reduce data transmission overhead.

[0014] In one possible design, the method described in the first aspect may further include receiving location information. The location information is used to indicate the locations of the M segments in the first information. Accordingly, determining the M pieces of indication information includes: dividing the first information into M segments based on the location information to obtain the M pieces of indication information, thereby avoiding reference signal errors caused by segmentation errors.

[0015] It should be understood that the location information is optional information. If the terminal is pre-configured or the protocol pre-defines segmentation rules, it is not necessary to receive the location information.

[0016] A possible design scheme is that the scheduling-free resources include M time-frequency resources, and each of the M time-frequency resources (such as one or more resource blocks, or one or more resource elements) is used to carry a corresponding reference signal among the M reference signals to avoid signal conflicts caused by one time-frequency resource carrying multiple reference signals.

[0017] Optionally, the method described in the first aspect may further include: receiving a correspondence between M time-frequency resources and M indication information, such as a one-to-one correspondence, that is, the M time-frequency resources correspond one-to-one to the M indication information. Accordingly, based on the M indication information, M reference signals are sent on the scheduling-free resources, including: based on the M indication information and the correspondence, M reference signals are sent on the M time-frequency resources to avoid signal demodulation failure caused by sending the reference signal on the wrong time-frequency resource.

[0018] It should be understood that the correspondence is optional information. If the terminal is pre-configured or the protocol pre-defines the correspondence between M time-frequency resources and M indication information, there is no need to additionally receive the correspondence.

[0019] In one possible design, the first information includes N bit sequences, where N is a positive integer. The j-th bit sequence in the N bit sequences is divided into mj segments, with j traversing from 1 to N, resulting in M ​​segments. A bitmap contained in each of the M segments is used as indication information. Compared to bit stuffing, the bitmap can indicate more reference signals using fewer bits.

[0020] For example, the j-th bit sequence can be expressed as follows:

[0021] Among them, c j represents the i-th bit sequence, c p,i represents the i-th bitmap, i is any integer from 1 to mj, F2 represents a finite 2-element domain, CN p Indicates that the i-th bitmap includes N p bits, N p is an integer greater than 1.

[0022] Optionally, the bit sequence is any one of the following: RM code, polar code, low-density parity check LDPC code, hash code, or cyclic redundancy check CRC code, or it can also be any possible code domain resource, which can be flexibly selected according to actual conditions and is not limited to this.

[0023] In a second aspect, a communication method is provided, comprising: receiving a reference signal on a non-scheduled resource, and performing error correction decoding on information indicating the reference signal to obtain first information, and decoding the non-scheduled transmission using the first information. The first information is divided into M segments to obtain M segments, each of the M segments corresponding to M pieces of indication information, the M pieces of indication information indicating that the reference signals received on the non-scheduled resource are M reference signals, where M is an integer greater than 1.

[0024] It is understood that the method described in the second aspect can be executed by a network device, an apparatus including a network device, or a chip within a network device, without limitation. For ease of description, the following description will take the method executed by a network device as an example.

[0025] Based on the above-mentioned methods of the first and second aspects, it can be known that since the M reference signals are segmented indications of information (such as the first information) obtained by the terminal through error correction coding. After the terminal sends M reference signals to the network device on the unscheduled resources, these M reference signals may change due to interference between different users when they are received by the network device. However, since the indication information of these reference signals is obtained through error correction coding, the network device determines the information used to indicate the reference signal based on the received reference signal, and performs error correction decoding on the information to restore the first information. In this way, the network device can decode the unscheduled transmission through the first information, so that when there is a conflict in the pilot resources used for unscheduled transmission by different users, decoding can still be performed.

[0026] In one possible design, before receiving the reference signal on the unscheduled resource, the method described in the second aspect may further include: performing error correction coding on the first sequence to be coded to obtain first information, and transmitting the first information. In this way, the peer device does not need to perform error correction coding, thereby facilitating energy conservation.

[0027] Optionally, the method described in the second aspect may further include: sending location information. The location information may be used to indicate the locations of the M segments in the first information, thereby ensuring that the opposite device can correctly segment the first information and avoid using incorrect reference signals due to segmentation errors.

[0028] In one possible design, before receiving the reference signal on the unscheduled resource, the method according to the second aspect may further include: performing error correction coding on the first sequence to be coded to obtain first information, dividing the first information into M segments to obtain M indication information, and sending the M indication information. In this way, the peer device does not need to perform error correction coding or segmentation, thereby facilitating energy conservation.

[0029] In one possible design, before receiving the reference signal on the non-scheduled resource, the method described in the second aspect may further include: performing error correction coding on each of the multiple sequences to be encoded to obtain and transmit multiple information. The multiple information includes the first information, and the multiple information are respectively used to indicate the reference signal corresponding to the non-scheduled resource.

[0030] It can be understood that the above-mentioned multiple information is usually information configured for multiple devices (such as multiple terminals). These multiple information can be sent at one time, such as a network device broadcasting multiple information, so that different terminals can obtain the information they need through one broadcast. Compared with the method of unicasting to multiple terminals separately, the communication overhead can be reduced.

[0031] Optionally, the method described in the second aspect may further include: sending an information index, wherein the information index is used to indicate the first information among the multiple information. That is, which information among the multiple information is used by different terminals can also be determined by the network device, thereby avoiding transmission conflicts caused by different terminals using the same information.

[0032] In a possible design scheme, before receiving the reference signal on the scheduling-free resource, the method described in the second aspect may further include: sending configuration parameters required for error correction coding.

[0033] Optionally, the configuration parameter may be used to indicate at least one of the following: a format of a sequence to be encoded, or a format of information obtained by error correction encoding.

[0034] In a possible design scheme, the method described in the second aspect may include: sending a first sequence to be encoded for error correction coding.

[0035] In one possible design, the scheduling-free resources include M time-frequency resources, and each of the M time-frequency resources is used to carry a corresponding one of the M reference signals.

[0036] Optionally, before receiving the reference signal on the non-scheduled resource, the method described in the second aspect may further include: sending a correspondence between M time-frequency resources and M indication information. Accordingly, receiving the reference signal on the non-scheduled resource includes: receiving the reference signal on the M time-frequency resources.

[0037] In one possible design scheme, the first information includes N bit sequences, where N is a positive integer. The j-th bit sequence in the N bit sequences is divided into mj segments, and j traverses from 1 to N to obtain M segments. A bit map contained in each of the M segments is used as an indication information.

[0038] Alternatively, the j-th bit sequence can be expressed as follows:

[0039] Among them, c j represents the i-th bit sequence, c p,i represents the i-th bitmap, i is any integer from 1 to mj, F2 represents a finite 2-element domain, CN p Indicates that the i-th bitmap includes N p bits, N p is an integer greater than 1.

[0040] Optionally, the bit sequence may be any one of the following: RM code, polar code, low-density parity check LDPC code, hash code, or cyclic redundancy check CRC code.

[0041] In one possible design, the complexity of the error correction code is positively correlated with the number of devices (e.g., the number of terminals) that reuse the unscheduled resources. That is, the network device can determine the complexity of the error correction code based on the number of terminals. For example, when there are a large number of terminals, the probability of resource conflicts is greater and the conflicts are more severe. The network device can instruct the terminal to execute or automatically execute more complex error correction coding, such as cascading multiple error correction codes, to achieve stronger error correction capabilities to cope with more severe resource conflicts. Conversely, when there are a small number of terminals, the probability of resource conflicts is smaller. The network device can instruct the terminal to execute or automatically execute simpler error correction coding to reduce overhead while ensuring error correction capabilities.

[0042] In addition, other technical effects of the method described in the second aspect can also refer to the technical effects of the method described in the first aspect, and will not be repeated here.

[0043] In a third aspect, a communication device is provided. The communication device includes: a module for executing the method described in any one of aspects 1 to 2, such as a transceiver module and a processing module. For example, the transceiver module is configured to indicate the transceiver function of the communication device, and the processing module is configured to perform functions of the communication device other than the transceiver function.

[0044] In a possible implementation, the communication device described in the third aspect includes a module for executing the method described in the first aspect, such as a transceiver module and a processing module.

[0045] The processing module is configured to obtain first information through error correction coding and determine M indication information. The M indication information is configured to indicate M reference signals corresponding to the non-scheduled resources. The M indication information corresponds one-to-one to M segments, where the M segments are obtained by dividing the first information into M segments, where M is an integer greater than 1. Thus, the transceiver module is configured to transmit the M reference signals on the non-scheduled resources based on the M indication information.

[0046] In one possible design, the processing module is specifically configured to obtain the first information by performing error correction coding on the first sequence to be coded. For example, the error correction coding may include at least one of the following: linear channel error correction coding, nonlinear channel error correction coding, or parity coding.

[0047] Optionally, the processing module is specifically configured to perform error correction coding on the first sequence to be encoded based on configuration parameters required for error correction coding to obtain the first information. For example, the configuration parameters may be used to indicate at least one of the following: a format of the sequence to be encoded, such as an encoding input length, or a format of information obtained by error correction coding, such as an encoding output length.

[0048] Optionally, the transceiver module is further configured to receive a first sequence to be encoded, or the processing module is further configured to determine the first sequence to be encoded.

[0049] Furthermore, the processing module is specifically configured to determine a sequence corresponding to the data to be sent as a first sequence to be encoded.

[0050] In one possible design, the transceiver module is further configured to receive location information, wherein the location information is configured to indicate the locations of the M segments in the first information. Accordingly, the processing module is specifically configured to divide the first information into M segments based on the location information to obtain M indication information.

[0051] In a possible design scheme, the scheduling-free resources include M time-frequency resources, and each of the M time-frequency resources (such as one or more resource blocks, or one or more resource elements) is used to carry a corresponding reference signal among the M reference signals.

[0052] Optionally, the transceiver module is further configured to receive a correspondence between M time-frequency resources and M indication information. Accordingly, the transceiver module is specifically configured to send M reference signals on the M time-frequency resources according to the M indication information and the correspondence.

[0053] In one possible design, the first information includes N bit sequences, where N is a positive integer. The j-th bit sequence in the N bit sequences is divided into mj segments, with j traversing from 1 to N, resulting in M ​​segments. A bitmap contained in each of the M segments is used as indication information. Compared to bit stuffing, the bitmap can indicate more reference signals using fewer bits.

[0054] For example, the j-th bit sequence can be expressed as follows:

[0055] Among them, c j represents the i-th bit sequence, c p,i represents the i-th bitmap, i is any integer from 1 to mj, F2 represents a finite 2-element domain, CN pIndicates that the i-th bitmap includes N p bits, N p is an integer greater than 1.

[0056] Optionally, the bit sequence is any one of the following: RM code, polar code, low-density parity check LDPC code, hash code, or cyclic redundancy check CRC code, or it can also be any possible code domain resource, which can be flexibly selected according to actual conditions and is not limited to this.

[0057] In another possible implementation, the communication device described in the third aspect includes a module for executing the method described in the second aspect, such as a transceiver module and a processing module.

[0058] The transceiver module is configured to receive a reference signal on a scheduling-free resource, and the processing module is configured to perform error correction decoding on information indicating the reference signal to obtain first information, so as to decode the scheduling-free transmission using the first information. The M segments are obtained by dividing the first information into M segments, and the M segments correspond one-to-one to the M indication information. The M indication information is configured to indicate that the reference signals received on the scheduling-free resource are M reference signals, where M is an integer greater than 1.

[0059] In one possible design, the processing module is further configured to perform error correction coding on the first sequence to be encoded to obtain first information before receiving the reference signal on the scheduling-free resource; and the transceiver module is further configured to send the first information.

[0060] Optionally, the transceiver module is further configured to send location information. The location information may be used to indicate the locations of the M segments in the first information.

[0061] In one possible design scheme, the processing module is also used to perform error correction coding on the first sequence to be encoded before receiving the reference signal on the unscheduled resource to obtain first information, divide the first information into M segments, and obtain M indication information; the transceiver module is also used to send M indication information.

[0062] In one possible design, the processing module is further configured to perform error correction coding on each of the multiple sequences to be encoded before receiving the reference signal on the non-scheduled resource to obtain multiple information, and the transceiver module is further configured to send the multiple information. The multiple information includes the first information, and the multiple information are respectively used to indicate the reference signal corresponding to the non-scheduled resource.

[0063] Optionally, the transceiver module is further used to send an information index, wherein the information index is used to indicate the first information among multiple information.

[0064] In one possible design, the transceiver module is further configured to send configuration parameters required for error correction coding before receiving the reference signal on the scheduling-free resource.

[0065] Optionally, the configuration parameter may be used to indicate at least one of the following: a format of a sequence to be encoded, or a format of information obtained by error correction encoding.

[0066] In a possible design solution, the transceiver module is further configured to send a first sequence to be encoded for error correction encoding.

[0067] In one possible design, the scheduling-free resources include M time-frequency resources, and each of the M time-frequency resources is used to carry a corresponding one of the M reference signals.

[0068] Optionally, the transceiver module is further configured to send a correspondence between the M time-frequency resources and the M indication information before receiving the reference signal on the scheduling-free resource. Accordingly, the transceiver module is specifically configured to receive the reference signal on the M time-frequency resources.

[0069] In one possible design scheme, the first information includes N bit sequences, where N is a positive integer. The j-th bit sequence in the N bit sequences is divided into mj segments, and j traverses from 1 to N to obtain M segments. A bit map contained in each of the M segments is used as an indication information.

[0070] Alternatively, the j-th bit sequence can be expressed as follows:

[0071] Among them, c j represents the i-th bit sequence, c p,i represents the i-th bitmap, i is any integer from 1 to mj, F2 represents a finite 2-element domain, CN p Indicates that the i-th bitmap includes N p bits, N p is an integer greater than 1.

[0072] Optionally, the bit sequence may be any one of the following: RM code, polar code, low-density parity check LDPC code, hash code, or cyclic redundancy check CRC code.

[0073] In one possible design, the complexity of the error correction coding is positively correlated with the number of devices that reuse the scheduling-free resources.

[0074] Optionally, the transceiver module may include a sending module and a receiving module, wherein the sending module is used to implement the sending function of the communication device described in the third aspect, and the receiving module is used to implement the receiving function of the communication device described in the third aspect.

[0075] Optionally, the communication device described in the third aspect may further include a storage module, wherein the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device may execute the method described in any one of the first aspect to the second aspect.

[0076] It can be understood that the communication device described in the third aspect can be a terminal or a network device, or a chip (system) or other parts or components that can be set in a terminal or a network device, or a device that includes a terminal or a network device. This application does not limit this.

[0077] In addition, the technical effects of the communication device described in the third aspect can refer to the technical effects of the other aspects mentioned above and will not be repeated here.

[0078] In a fourth aspect, a communication device is provided, comprising: a processor configured to execute the method described in any one of the first to second aspects.

[0079] In one possible design solution, the communication device described in the fourth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fourth aspect to communicate with other communication devices.

[0080] In one possible design, the communication device described in the fourth aspect may further include a memory. The memory may be integrated with the processor or provided separately. The memory may be used to store the computer program and / or data involved in the method described in any one of the first and second aspects.

[0081] In an embodiment of the present application, the communication device described in the fourth aspect can be the terminal or network device described in any one of the first to second aspects, or a chip (system) or other parts or components that can be set in the terminal or network device, or a device that includes the terminal or network device.

[0082] In addition, the technical effects of the communication device described in the fourth aspect can refer to the technical effects of the methods described in any one of the first aspect to the second aspect, and will not be repeated here.

[0083] In a fifth aspect, a communication device is provided, comprising: a processor coupled to a memory, the processor configured to execute a computer program stored in the memory, so that the communication device performs the method described in any one of the first to second aspects.

[0084] In one possible design solution, the communication device described in the fifth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fifth aspect to communicate with other communication devices.

[0085] In an embodiment of the present application, the communication device described in the fifth aspect can be the terminal or network device described in any one of the first to second aspects, or a chip (system) or other parts or components that can be set in the terminal or network device, or a device that includes the terminal or network device.

[0086] In addition, the technical effects of the communication device described in the fifth aspect can refer to the technical effects of the methods described in any one of the first aspect to the second aspect, and will not be repeated here.

[0087] In a sixth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store a computer program, and when the processor executes the computer program, the communication device executes the method described in any one of the first to second aspects.

[0088] In one possible design solution, the communication device described in the sixth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the sixth aspect to communicate with other communication devices.

[0089] In an embodiment of the present application, the communication device described in the sixth aspect can be the terminal or network device described in any one of the first aspect to the second aspect, or a chip (system) or other parts or components that can be set in the terminal or network device, or a device that includes the terminal or network device.

[0090] In addition, the technical effects of the communication device described in the sixth aspect can refer to the technical effects of the methods described in any one of the first aspect to the second aspect, and will not be repeated here.

[0091] In a seventh aspect, a chip is provided, comprising: a controller and an interface circuit, wherein the controller is used to interact with other devices through the interface circuit to execute the method described in any one of the first to second aspects.

[0092] In an eighth aspect, a communication system is provided, comprising: a terminal for executing the method according to the first aspect, and a network device for executing the method according to the second aspect.

[0093] In a ninth aspect, a computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are run on a computer, the computer is caused to execute the method described in any one of the first to second aspects.

[0094] In a tenth aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed on a computer, causes the computer to execute the method described in any one of the first to second aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] Figure 1 shows a pilot pattern 1 of scheduling-free resources;

[0096] Figure 2 shows the second pilot pattern of the scheduling-free resource;

[0097] FIG3 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0098] FIG4 is a flow chart of a communication method according to an embodiment of the present application;

[0099] FIG5 is a diagram of a reference signal before error correction in a communication method provided in an embodiment of the present application;

[0100] FIG6 is a diagram of a reference signal after error correction in a communication method provided in an embodiment of the present application;

[0101] FIG7 is a first structural diagram of a communication device provided in an embodiment of the present application;

[0102] FIG8 is a second structural diagram of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0103] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless network (Wi-Fi) systems, ultra-wide band (UWB) systems, vehicle-to-everything (V2X) communication systems, device-to-device (D2D) communication systems, Internet of Vehicles communication systems, fourth-generation (4G) mobile communication systems, such as long-term evolution (LTE) systems, world-wide interoperability for microwave access (WiMAX) communication systems, 5G, such as NR systems, and future communication systems (5.5G, 6G), etc.

[0104] For ease of understanding, the technical terms involved in the embodiments of this application are first introduced below.

[0105] 1. Scheduling-free / dynamic grant-free (grant-free, GF) transmission:

[0106] Unscheduled transmission may be one of the transmission schemes used to reduce transmission delay in the future. Unscheduled transmission mainly includes two categories. One is that the terminal completes uplink data transmission during random access, such as the two-step random access (2-step RA) process introduced in the fifth generation (5G) mobile communication system, that is, the new radio (NR) system. The other is that the terminal directly performs uplink data transmission, such as the semi-persistent scheduling (SPS) in the long term evolution (LTE) system, the transmission based on preconfigured uplink resources (PUR), and the configured grant (CG) transmission in NR. The common feature of these two types of scheduling-free transmission is that before uplink transmission, the terminal does not need to obtain the time-frequency resources and transmission parameters used to send data by monitoring the base station's dynamic authorization. Instead, it uses pre-configured time-frequency resources and transmission parameters to send data to the base station. These pre-configured time-frequency resources and transmission parameters are usually configured by the base station through high-layer signaling, such as system information (SI) or user equipment (UE)-specific radio resource control (RRC) signaling. The difference between these two types of scheduling-free transmission is that for two-step random access, the terminal also sends a random access preamble to the base station when sending data. That is, the terminal's data and the random access preamble are included in the same uplink message, which is used for uplink synchronization between the terminal and the base station. For direct uplink data transmission by the terminal, the terminal does not need to send a random access preamble to the base station. In other words, the direct transmission solution is more suitable for situations where the terminal and the base station have already completed uplink synchronization.

[0107] As can be seen, scheduling-free transmission can eliminate the signaling overhead and latency associated with dynamic grants, improving transmission efficiency. However, because it is pre-configured, multiple users often share pre-configured resources. When multiple users need to transmit data at the same time, resource contention arises, impacting user data transmission. Conflicts are particularly severe when a user accesses the scheduling-free resources using the same time-frequency resources and pilot signals (port, sequence) as other users. In this case, because the pilot signals of multiple users are identical, the base station may not be able to identify and distinguish these users through the pilot signals. Consequently, it cannot obtain the channel state information (CSI) of each user, making signal demodulation impossible. Even if the base station detects the conflicting pilot signal, it typically assumes that only one user is using the pilot signal, and subsequent demodulation is performed according to the demodulation mode of that single user. In other words, a pilot collision often means that at most one user using the pilot signal can transmit correctly, while all other users fail. Therefore, pilot collisions are a performance bottleneck that restricts scheduling-free transmission solutions.

[0108] To reduce conflicts, one current solution (denoted as Solution 1) is to reduce the possibility of conflict collisions by expanding pilot resources. That is, the more pilots a terminal can select, the lower the probability of pilot conflicts. For example, different users are assigned to use different pilots, and the number of pilots required corresponds to the number of users. As shown in Figure 1, UE0 is assigned to resource blocks (RB) 0 and RB1 to use pilot 0, and UE1 is assigned to RB0 and RB1 to use pilot 1. In this case, the least square (LS) channel estimation output of pilot k among multiple pilots can be expressed as follows: y = b0h0s0 + b1h1s1 + n; (1)

[0109] Among them, when That is, when pilot 1 and pilot 0 are not orthogonal, h1 leaks to h0, which will cause the following problems:

[0110] If b0=0, b1=1, that is, UE 0 does not send, when UE1 sends, h1 is leaked to When the leakage energy is large enough, When it is greater than the activity detection threshold Th, the base station will think that s0 is sending, causing a false alarm for UE 0. If b0=1, b1=1, that is, UE 0 sends, when UE1 sends, h1 is leaked to When h1 and h0 cancel each other out, it may lead to If the value is less than the detection threshold Th, the base station will think that s0 is not sent, causing UE 0 to miss detection. Similarly, UE1 will also miss detection because However, the detection performance is degraded by the influence of UE 0 (i.e., there is a possibility of false alarm or missed detection). In other words, only when pilot 0 is orthogonal to pilot 1, that is, Only by avoiding pilot leakage and the resulting false alarms and missed detections can solution 1 be implemented. However, orthogonal pilot resources are limited, which limits the number of users supported by solution 1. For example, N orthogonal pilots can only carry N users, limiting its practical application.

[0111] Similarly, to reduce conflicts, another current solution (denoted as Solution 2) is to configure a pilot pattern to achieve more pilots when different users are assigned different pilots. In other words, the pilot pattern can support more users with fewer pilots. For example, as shown in Figure 2, UE0 is assigned to use pilot 0 on RB0 and RB1, UE1 is assigned to use pilot 1 on RB0 and RB1, UE2 is assigned to use pilot 0 on RB0 and pilot 1 on RB1, and UE3 is assigned to use pilot 1 on RB0 and pilot 0 on RB1. In other words, scheduling-free transmission for four UEs is achieved using two pilots.

[0112] However, Solution 2 also has the same problem as Solution 1. Taking Figure 2 as an example, assume that the base station detects both RB0 and RB1. This means that Pilot 0 is detected as active. Based on the pilot pattern shown in Figure 2, the base station can assume that UE0 is active, or that UE0 has transmitted Pilot 0. However, it is difficult to confirm whether UE2 is active. For example, UE2 may not actually transmit Pilot 0 on RB0, but Pilot 0 transmitted by UE1 on RB0 may leak, causing the base station to believe that UE2 has transmitted Pilot 0 on RB0, resulting in a false alarm. Another example is that UE2 may actually transmit Pilot 1 on RB1, but due to poor transmission quality, the base station may not detect Pilot 1 there, resulting in a missed detection. In other words, due to the overlap in pilot patterns between users in the figure above, the decision is ambiguous, making false alarms more likely, and missed detections are also possible. Furthermore, these false alarms and missed detections are carried over into the base station's overall pilot pattern decision, leading to even more serious error propagation.

[0113] It is understood that different pilots can be understood as different pilot ports, or belong to different pilot ports. In addition, the pilots mentioned in the embodiments of the present application can also be understood as reference signals.

[0114] In order to solve the above technical problems, the present application proposes the following technical solutions. The technical solutions in the present application will be described below in conjunction with the accompanying drawings.

[0115] In the embodiment of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the second indication information, the first indication information, or the second indication information below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein the other information and the information to be indicated have an association relationship. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can be achieved by means of the arrangement order of each information agreed in advance (such as specified in the protocol), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each information can be identified and indicated uniformly to reduce the indication overhead caused by indicating the same information separately.

[0116] In addition, the specific indication method can also be various existing indication methods, such as but not limited to the above-mentioned indication methods and various combinations thereof. The specific details of the various indication methods can refer to the current relevant technologies and will not be repeated in this article. As can be seen from the above, for example, when it is necessary to indicate multiple information of the same type, there may be a situation where the indication methods for different information are different. In the specific implementation process, the required indication method can be selected according to specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present application should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0117] It should be understood that the information to be indicated can be sent as a whole or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in the embodiments of this application. The sending period and / or sending time of these sub-information can be predefined, for example, predefined according to a protocol, or can be configured by the transmitting device by sending configuration information to the receiving device.

[0118] "Pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in the device, and the embodiments of the present application do not limit the specific implementation method. Among them, "saving" can mean saving in one or more memories. The one or more memories can be set separately or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories can also be partially set separately and partially integrated in a decoder, a processor, or a communication device. The type of memory can be any form of storage medium, and the embodiments of the present application do not limit this.

[0119] The "protocol" involved in the embodiments of the present application may refer to a protocol family in the communication field, a standard protocol with a similar protocol family frame structure, or a related protocol used in future communication systems. The embodiments of the present application do not make specific limitations on this.

[0120] In the embodiments of the present application, descriptions such as "when...", "in the case of...", "if" and "if" all mean that the device will perform corresponding processing under certain objective circumstances. It does not limit the time, nor does it require the device to perform judgment actions when implemented, nor does it mean that there are other limitations.

[0121] In the description of the embodiments of the present application, unless otherwise specified, " / " indicates that the objects associated with each other are in an "or" relationship. For example, A / B can represent A or B. "And / or" in the embodiments of the present application is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, in the description of the embodiments of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with basically the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit differences. At the same time, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0122] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

[0123] To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail using the communication system shown in Figure 3 as an example. For example, Figure 3 is a schematic diagram of the architecture of a communication system applicable to the communication method provided in the embodiments of the present application.

[0124] As shown in FIG3 , the communication system may include: a terminal and a network device.

[0125] A terminal may also be called a UE, an access terminal, a subscriber unit, a user station, a mobile station (MS), a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The terminal in the embodiments of the present application can be a mobile phone, a cellular phone, a smart phone, a tablet computer, a wireless data card, a personal digital assistant (PDA), a wireless modem, a handheld device (handset), a laptop computer, a machine type communication (MTC) terminal, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a smart home device (for example, a refrigerator, a television, an air conditioner, an electric meter, etc.), an intelligent robot, a robotic arm, a workshop equipment, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a vehicle-mounted terminal, a roadside unit with terminal function, or a wireless terminal in a smart city. The terminal device of the present application may also be an onboard module, onboard module, onboard component, onboard chip or onboard unit built into a vehicle as one or more components or units. The terminal device may also be other devices with terminal functions, for example, the terminal device may also be a device that functions as a terminal in D2D communication.

[0126] The terminal described in the embodiments of the present application can be a single terminal or a terminal in a group scenario, that is, the terminal is a member of a group. A group can be a combination of members with the same attributes. For example, it can be a combination of members that can enjoy the consistency service provided by the application network element, or it can be a combination of all terminal devices located in a specified area. The group can be a 5G local area network (5G local area network, 5G LAN), also known as a 5G virtual network (5G virtual network, 5G VN), or other types of groups, such as temporary groups or dynamic groups (groups that require dynamic management of group members), which are not specifically limited.

[0127] The embodiments of this application do not limit the device form factor of the terminal. The device used to implement the terminal's function can be a terminal; it can also be a device that supports the terminal in implementing the function, such as a chip system. The device can be installed in the terminal or used in conjunction with the terminal. In the embodiments of this application, the chip system can be composed of a chip or include a chip and other discrete components.

[0128] The network device may be a radio access network (RAN) device, also known as an access network device. The access network device may specifically be a next-generation mobile communication system, such as a 6G access network device, such as a 6G base station, or in the next-generation mobile communication system, the access network device may also have other naming methods, all of which are included in the protection scope of the embodiments of the present application, and the present application does not impose any restrictions on this. Alternatively, the access network device may also include 5G, such as a gNB in ​​a new radio (NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in 5G, or a network node constituting a gNB, a transmission point (TRP or transmission point, TP) or a transmission measurement function (TMF), such as a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), an RSU with base station function, or a wired access gateway, or a 5G core network element, etc. Alternatively, the access network device may also include: an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, various forms of macro base stations, micro base stations (also known as small stations), relay stations, access points, wearable devices, vehicle-mounted devices, etc.

[0129] Among them, the CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH). It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, or the CU can be divided into a network device in the core network CN, and there is no limitation here.

[0130] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0131] The embodiments of this application do not limit the device form factor of the network device. The device used to implement the function of the network device can be a network device; it can also be a device that supports the network device to implement the function, such as a chip system. The device can be installed in the network device or used in conjunction with the network device. In the embodiments of this application, the chip system can be composed of chips or can include chips and other discrete components.

[0132] In a communication system, the information used to indicate a reference signal may be information obtained through error correction coding, such as M indication information indicating the M reference signals corresponding to the non-scheduled resources, where M is an integer greater than 1. Thus, when a terminal transmits M reference signals on the non-scheduled resources based on the M indication information, the network device can determine the information corresponding to the reference signal based on the reference signal received on the non-scheduled resources and perform error correction decoding on the information to restore the M indication information, thereby confirming that the terminal transmitted the M reference signals. This can mitigate burst errors, reduce error propagation, and avoid false alarms and missed detections.

[0133] The following will be combined with Figures 4 to 6 to specifically describe the interaction process between each network element / device in the above communication system through a method embodiment. The communication method provided in the embodiment of the present application can be applied to the above communication system and specifically applied to various scenarios mentioned in the above communication system, which will be described in detail below.

[0134] Figure 4 is a flow chart of a communication method provided in an embodiment of the present application. The communication method is applicable to the above-mentioned communication system and mainly involves the interaction between the terminal and the network device.

[0135] As shown in Figure 4, the process of the communication method is as follows:

[0136] S401: The terminal sends M reference signals on the non-scheduling resources according to M indication information. Correspondingly, the network device receives the reference signals on the non-scheduling resources.

[0137] The M indication information can be used to indicate the M reference signals corresponding to the unscheduled resources. The M indication information can be included in the first information obtained through error correction coding. For example, the first information can be divided into M segments, resulting in M ​​segments, each of which corresponds to the M indication information, where M is an integer greater than 1. After a terminal sends M reference signals, the M reference signals may vary during transmission due to interference between different users. Therefore, when a network device receives a reference signal, it cannot determine the specific terminal from which the reference signal originated.

[0138] S402: The network device performs error correction decoding on information indicating a reference signal to obtain first information.

[0139] The network device may determine information indicating each received reference signal, such as a bitmap. The network device may combine the bitmaps to obtain one or more bit sequences. The network device may obtain the first information by performing error correction decoding on the bit sequences.

[0140] S403: The network device decodes the scheduling-free transmission using the first information.

[0141] After the network device obtains the first information through error correction decoding, the network device can use the first information to decode the data of the scheduled-free transmission, such as the data sent by the terminal through the scheduled-free transmission. At this time, if the decoding is wrong, the network device can send an error indication to trigger the terminal to retransmit.

[0142] In summary, since the first information obtained through error correction coding can indicate the M reference signals corresponding to the non-scheduling resources, when the terminal sends M reference signals on the non-scheduling resources, the network device can determine the information corresponding to these reference signals based on the reference signals received on the non-scheduling resources, and perform error correction coding on this information to restore the first information. Therefore, it can resist burst errors, reduce error propagation, and avoid false alarms and missed detections.

[0143] The above S401-S402 are described in detail below.

[0144] S401:

[0145] 1) First information:

[0146] The first information may include N bit sequences, or pilot bit sequences, or reference signal bit sequences, where N is a positive integer. Each bit sequence may be a related bit sequence obtained by error correction coding. Error correction coding may be performed by encoding function The error correction code can be a single error correction code, such as a linear error correction code or a nonlinear error correction code, which has relatively low coding complexity and requires relatively low overhead. Alternatively, the error correction code can be a cascade of multiple error correction codes, which has higher coding complexity and stronger error correction capabilities.

[0147] For example, linear channel error correction coding is cascaded with nonlinear channel error correction coding, and the initial sequence is first subjected to nonlinear channel error correction coding to obtain an intermediate result, and then the intermediate result is subjected to linear channel error correction coding to obtain a bit sequence. The linear channel error correction coding may include any of the following: RM code, polar code, low-density parity-check code (LDPC) code. For another example, the nonlinear channel error correction coding may include a hash code. The check code may include a cyclic redundancy check (CRC) code.

[0148] 2) M indication information:

[0149] If the jth bit sequence in an N-bit sequence is divided into mj segments, with j traversing from 1 to N, M segments are obtained. A bitmap contained in each of the M segments is used as indication information to indicate a corresponding reference signal among the M reference signals, such as the index (or identifier) ​​of the reference signal. Compared to bit stuffing, bitmaps can indicate more reference signals using fewer bits.

[0150] For example, an example of the j-th bit sequence can be expressed by the following equation 2:

[0151] Among them, c j It can represent the jth bit sequence, mj can represent that the jth bit sequence is divided into mj segments, that is, mj bitmaps, if N=1, then mj=M. p,i It can be the identifier (or segment number) of the i-th bitmap in the mj bitmaps, used to represent the i-th bitmap, that is, the i-th indication information, where i is any integer from 1 to mj. F2 can represent a finite 2-element domain consisting of {0,1}, CN p It can be said that the i-th bitmap includes N p bits, N p It can be an integer greater than 1. If a reference signal is carried on a time-frequency resource, then N p It can indicate that for this time-frequency resource, it can support In other words, in the case of spatial layering, a time-frequency resource can be used at most by Different reference signals are multiplexed.

[0152] It is understood that when N is greater than 1, different bit sequences may have different numbers of segments, but the length of each segment should be the same. For example, when N = 2, bit sequence #1 includes 8 bits, divided into 2 segments, each of which is a 4-bit bitmap; bit sequence #2 includes 16 bits, divided into 4 segments, each of which is also a 4-bit bitmap.

[0153] Unscheduled resources are resources that are pre-configured or pre-defined by the protocol for use by the terminal. Unscheduled resources may include M time-frequency resources, and each of the M time-frequency resources (such as one or more resource blocks (RBs), or one or more resource elements (REs)) can be used to carry a corresponding one of the M reference signals to avoid signal conflicts caused by one time-frequency resource carrying multiple reference signals. There may be a correspondence between the M indication information and the M time-frequency resources, such as a one-to-one correspondence, that is, the M time-frequency resources correspond one-to-one to the M indication information, so that the terminal can map the M reference signals indicated by the M indication information to the M time-frequency resources.

[0154] For example, a network device may send a correspondence between M time-frequency resources and M indication information, and the terminal may receive the correspondence accordingly. In this way, the terminal may send M reference signals on the M time-frequency resources based on the correspondence, and the network device may receive the reference signals on the M time-frequency resources accordingly, thereby avoiding signal reception and demodulation failures caused by sending reference signals on incorrect time-frequency resources.

[0155] It should be understood that the correspondence is optional information. If the terminal is pre-configured or the protocol pre-defines the correspondence between M time-frequency resources and M indication information, the network device will additionally send the correspondence, and the terminal does not need to additionally receive the correspondence.

[0156] For easier understanding, an example is given below.

[0157] If N = 1, it represents a 16-bit bit sequence, such as 0011010011011111. M = 4, indicating that the bit sequence needs to be divided into four segments, i.e., four indication information. This also means that a terminal can use four reference signals on four time-frequency resources. A bitmap corresponding to the four bits in each segment can be used to represent a corresponding reference signal, such as 0011, 0100, 1101, and 1111. 0011 converts to decimal to 3, indicating that the index of the reference signal is 3, recorded as reference signal 3. Similarly, 0100 converts to decimal to 4, indicating reference signal 4. Similarly, 1101 converts to decimal to 13, indicating reference signal 13. Similarly, 1111 converts to decimal to 15, indicating reference signal 15. That is, the four indication information are used to instruct the terminal to multiplex the reference signals on the four time-frequency resources as: reference signal 3, reference signal 4, reference signal 13, and reference signal 15 respectively.

[0158] If N = 2, there are two bit sequences, each 8 bits long, such as bit sequence #1: 00110100 and bit sequence #2: 11011111. If m1 = 2, bit sequence #1 needs to be divided into two segments, resulting in two indications, such as 0011 and 0100. If m2 = 2, bit sequence #2 needs to be divided into two segments, resulting in 42 indications, such as 1101 and 1111. This yields a total of four indications, which the terminal uses to multiplex reference signals on four time-frequency resources: reference signal 3, reference signal 4, reference signal 13, and reference signal 15.

[0159] In this way, an example of the correspondence between 4 indication information and 4 time-frequency resources can be shown in the following Table 1.

[0160] Table 1

[0161] As shown in Table 1, 0011 indicates reference signal 3, meaning that reference signal 3 is mapped to RB1, or in other words, the reference signal is carried by RB1. 0100 indicates reference signal 4, meaning that reference signal 4 is mapped to RB2. 1101 indicates reference signal 13, meaning that reference signal 13 is mapped to RB3. 1111 indicates reference signal 15, meaning that reference signal 15 is mapped to RB4.

[0162] The above describes the definitions of the first information and the M indication information. The following describes in detail how the terminal obtains the first information or the M indication information. For example, the first information or the M indication information may be received by the terminal, or may be generated by the terminal itself.

[0163] Case 1: The network device sends the first information, and correspondingly, the terminal receives the first information.

[0164] For example, the network device may perform error correction coding on the first sequence to be encoded, such as performing error correction coding (e.g., single error correction coding or cascaded multiple error correction coding) on ​​the first sequence to be encoded based on error correction coding configuration parameters, to obtain first information. The network device may then transmit the first information, thereby eliminating the need for a peer device (e.g., a terminal) to perform error correction coding, thereby facilitating energy conservation.

[0165] The above-mentioned first sequence to be encoded can be a random sequence, a random number, an identifier of a network device, or other sequences. The embodiment of the present application does not limit the specific implementation of the first sequence to be encoded on the network side. For example, the network device can randomly generate the first sequence to be encoded, or can also obtain and configure the first sequence to be encoded locally. In addition, the first sequence to be encoded is only an exemplary naming of the embodiment of the present application, and it can also be replaced by any possible naming, such as the original bit sequence, random bit sequence, input bit sequence, etc., without limitation.

[0166] The above-mentioned configuration parameters can be used to indicate at least one of the following: the format of the coding sequence, such as the coding input length, or the format of the indication information obtained by error correction coding, such as the output code length. These can also be understood as the execution rules required by the network device to perform error correction coding, or the format of the information obtained by error correction coding, such as the coding output length. For example, the network device can generate / obtain a sequence to be encoded of a corresponding length based on the coding input length. For another example, the network device can also configure the matrix parameters of the function required to perform error correction coding, such as the position mapping matrix (denoted as π) in polar coding, based on the coding output length, to ensure that the error correction coding can output a bit sequence of the corresponding length.

[0167] The following describes how to perform single error correction coding or cascade multiple error correction coding on a network device.

[0168] Method 1, single error correction coding:

[0169] The first sequence to be encoded can be represented as b, is a random bit sequence, and L≤CN p . Verification function is a coding function with checksum and error correction capabilities, which can represent the above-mentioned single channel error correction coding or single checksum coding. Then, the network device performs error correction coding on the first sequence to be encoded according to the configuration parameters of the error correction coding, which can be expressed as: c is the check function The output is the bit sequence mentioned above.

[0170] It can be understood that if N=1, that is, the first information contains only one bit sequence, then the network device can obtain the first information by performing the above single error correction coding once. If N>1, that is, the first information contains multiple bit sequences, then the network device can repeatedly perform the above single error correction coding multiple times to obtain the first information. Different single error correction coding check functions Can be the same or different. For example, n is an integer greater than 1, indicating the number of times a single error correction code is repeated. The check function It can represent the polarization coding in the channel error correction coding, the check function It can represent the CRC check code in the check code, and so on, which will not be repeated.

[0171] It can also be understood that the verification function It can be applied to all users on the same scheduling-free resource, or all terminals using the scheduling-free resource, that is, the network device can use the same verification function for these terminals To generate a bit sequence, different terminals may correspond to different first sequences to be encoded, and ultimately obtain different first information, so that different terminals can multiplex different reference signals.

[0172] For ease of understanding, we continue to use the above example as an example.

[0173] In the case of CRC checksum coding, for example, the coding input length can be set to 8 bits, the coding output length can be set to 16 bits, and the is an 8-bit CRC check function, such as If the first 8-bit sequence to be encoded is represented as 0x34, the network device performs a CRC check code on the first sequence to be encoded, and the resulting CRC code can be 0x34DF, which is converted into binary representation as 0011010011011111, i.e., the first information. For another example, the encoding input length can be set to 4 bits, the encoding output length can be set to 8 bits, and The network device performs a CRC check code on the 4-bit first sequence to be encoded, and the resulting CRC code is converted into binary and can be represented as 00110100.

[0174] In the case of polar coding, for example, the coding input length can be set to 8 bits and the coding output length can be set to 16 bits. The configuration of the relevant parameters required for performing polar coding is performed, such as the generator matrix is: Verification Function It can be expressed as G 16 u,u=π(b,0 1×8), indicating that the sequence u is a 16-bit sequence obtained by filling the 8-bit first sequence to be encoded with an 8-bit sequence of all 0s. π is a position mapping matrix, indicating that b and 0 1×8 Mapped to the sequence position specified by sequence u. In this way, if the first 8-bit sequence to be encoded is represented as 0x34, the network device can also perform polarization encoding on the first sequence to be encoded once, and the polarization code obtained can also be 0x34DF, which is also represented as 0011010011011111 in binary, i.e., the first information. For another example, the encoding input length can be set to 4 bits, the encoding output length can be set to 8 bits, and the configuration of the relevant parameters required for performing polarization encoding can be performed, such as the generator matrix is Verification Function It can be expressed as G 16 u,u=π(b,0 1×4 ), indicating that the sequence u is an 8-bit sequence obtained by filling the 4-bit first sequence to be encoded with a 4-bit sequence of all 0s. π is a position mapping matrix, indicating that b and 0 1×4 Mapped to the sequence position specified by sequence u. In this way, the network device performs polar coding on the 4-bit sequence to be coded, and the obtained polar code can be converted into binary and represented as 11011111.

[0175] Method 2: Multiple error correction codes cascaded:

[0176] The first sequence to be encoded can still be expressed as b, the difference is that the check function n is an integer greater than 1, indicating multiple error correction codes cascaded. For example, the verification function Represents the polarization coding in the channel error correction coding. Check function Indicates the CRC check code in the check code. Then, Indicates that the error correction coding is cascaded polarization coding and CRC checksum coding. In other words, the network device can first perform polarization coding on the first sequence to be coded to obtain a polar code, and then perform CRC checksum coding on the polar code to obtain a CRC code.

[0177] It can be understood that if N=1, that is, the first information contains only one bit sequence, then the network device can obtain the first information by performing the above-mentioned multiple error correction coding cascade once. If N>1, that is, the first information contains multiple bit sequences, then the network device can repeatedly perform the above-mentioned multiple error correction coding cascade multiple times to obtain the first information. Different check functions of multiple error correction coding cascades They can be the same or different, and there is no limitation on this.

[0178] In the embodiment of the present application, the terminal may receive the first information, divide the first information into M segments, and obtain M segments of the first information, wherein each segment of the M segments is an indication information, and the total number of indication information is M.

[0179] Optionally, the network device may also send location information. Accordingly, the terminal may also receive location information. The location information and the first information may be carried in the same message, or may be carried in different messages respectively, and there is no limitation on this. The location information may be used to indicate the positions of the M segments in the first information. For example, the location information may include the number mj into which the j-th bit sequence is equally divided. In this case, if there is only one bit sequence, mj=M, which implicitly indicates the positions of the M indication information in the first information. Alternatively, the location information may also include: the segment number of the i-th bitmap in each bit sequence (such as the c above); p,i ), and the segmented resource position of the i-th bitmap, to indicate that bits x through y in the bit sequence constitute the i-th bitmap, i.e., to indicate the positions of the M indication information in the first information, where x and y are different positive integers. In this way, the terminal can divide the first information into M segments based on the position information to obtain M indication information, thereby avoiding reference signal errors caused by segmentation errors.

[0180] It should be understood that location information is optional information. If the terminal is pre-configured or the protocol pre-defines segmentation rules, the network device does not need to send location information and the terminal does not need to receive location information.

[0181] Case 2: The network device sends M indication information, and correspondingly, the terminal receives M indication information.

[0182] For example, the network device may perform error correction coding on the first sequence to be encoded, such as performing error correction coding (such as single error correction coding, or multiple error correction coding cascades) on the first sequence to be encoded according to the configuration parameters of the error correction coding to obtain the first information. The network device may divide the first information into M segments to obtain M indication information. The specific implementation principle may also refer to the relevant introduction of the above-mentioned situation 1, which will not be repeated here. For another example, the network device may also not perform segmentation and directly generate M indication information, such as performing error correction coding on M different first sequences to be encoded respectively. In this case, the error correction coding performed on each first sequence to be encoded can obtain one indication information, for a total of M indication information. In this way, the network device can send M indication information, such as M segments of independent bit maps. In this way, the opposite device (such as a terminal) not only does not need to perform error correction coding, but also does not need to perform segmentation operations, which is more energy-saving.

[0183] Case 3: The network device sends multiple messages, and correspondingly, the terminal receives multiple messages.

[0184] The network device can perform error correction coding on each of the multiple sequences to be encoded, obtaining and transmitting multiple pieces of information. The multiple pieces of information include the first information, and the multiple pieces of information are each used to indicate a reference signal corresponding to a scheduling-free resource. Furthermore, the principle of the network device performing error correction coding on each sequence to be encoded is similar to that described above, and reference can be made to the description of Case 1 above, which is not further elaborated here.

[0185] It should be understood that the aforementioned multiple information is typically information configured for multiple devices (e.g., multiple terminals) and can be sent all at once. For example, the network device can broadcast these multiple information at once, allowing different terminals to obtain the information they need through a single broadcast. This reduces communication overhead compared to unicasting to multiple terminals separately. Of course, the network device also unicasts these multiple information to designated terminals, without limitation.

[0186] Optionally, the network device may also send an information index, where the information index is used to indicate the first information among the multiple information. That is, the network device may also determine which information among the multiple information is used by different terminals, thereby avoiding transmission conflicts caused by different terminals using the same information.

[0187] For ease of understanding, we continue to use the above example as an example.

[0188] Taking a 16-bit bit sequence as an example, an example of multiple information may be shown in Table 2:

[0189] Table 2

[0190] Taking an 8-bit bit sequence as an example, another example of multiple information may be shown in Table 3:

[0191] Table 3

[0192] As shown in Table 2 and Table 3, each indication information index can be used to indicate a bit sequence contained in a corresponding piece of information in multiple pieces of information. For example, the indication information index 0x01 in Table 2 can indicate the bit sequence 0011010011011111, and the indication information index 0x02 in Table 3 can indicate the bit sequence 11011111.

[0193] Taking Table 2 as an example, if the network device sends information with an index of 0x01, the terminal queries Table 2 based on 0x01 and determines that the first information contains one bit sequence, which is 0011010011011111. Taking Table 3 as an example, if the network device sends information with indexes of 0x01 and 0x02, the terminal queries Table 3 based on 0x01 and 0x02 and determines that the first information contains two bit sequences, which are 00110100 and 11011111 respectively.

[0194] It should be understood that the information index is optional information. If the network device does not send the information index, the terminal can also determine the information index by itself. For example, the terminal can generate one or more random bit sequences by itself and determine an information index corresponding to each random bit sequence, such as c index =bin2Dec(B), where bin2Dec() represents a binary to decimal conversion operation and B is a random bit sequence. In this way, the terminal can also determine the information corresponding to the information index among multiple information, such as the first information, based on the information index.

[0195] It will be appreciated that in the above cases 1-3, if the terminal is a single terminal, the first information may apply only to that terminal, and different terminals may use different indication information. Alternatively, if the terminal is a member of a group, the first information may apply to the group, i.e., all terminals in the group may use the same information.

[0196] Case 4: The terminal determines M indication information.

[0197] For example, the terminal obtains the first information through error correction coding. Specifically, the terminal may obtain the first information by performing error correction coding on the first sequence to be coded, such as performing error correction coding on the first sequence to be coded according to configuration parameters required for error correction coding.

[0198] The first sequence to be encoded can be obtained by the terminal from a network device. For example, the network device can send the first sequence to be encoded, and the terminal can receive the first sequence to be encoded accordingly, thereby avoiding the processing overhead of determining the first sequence to be encoded. Alternatively, the first sequence to be encoded can be determined by the terminal itself, thereby avoiding additional communication overhead.

[0199] For example, the terminal may determine the sequence corresponding to the relevant information of the terminal as the first sequence to be encoded. The relevant information of the terminal may be at least one of the following: a random number generated by the terminal itself, or an identifier of the terminal, such as a user permanent identifier (SUPI) or an international mobile subscriber identity (IMSI), etc. Alternatively, the relevant information of the terminal may also include any other information, which may not be constrained by the network device and is not specifically limited. The sequence corresponding to the relevant information of the terminal can be understood as a binary expression of the relevant information of the terminal. The terminal may directly determine the coding sequence as the first sequence to be encoded, or may also determine a partial sequence in the coding sequence as the first sequence to be encoded.

[0200] It is understood that the terminal can generate a random number once, and the random number can remain unchanged, such as using the random number for error correction coding in each scheduling-free transmission of the terminal. Alternatively, the terminal can dynamically generate a random number, such as using a newly generated random number for error correction coding in each scheduling-free transmission of the terminal.

[0201] For another example, the terminal may determine the sequence corresponding to the data to be sent as the first sequence to be encoded. The data to be sent may be the data that needs to be sent for this scheduling-free transmission, that is, the reference signal is used to carry the data to reduce communication overhead. Specifically, the data to be sent may be the bits of the information elements at different positions (or information element bits), so that the terminal determines the sequence composed of these information element bits as the sequence to be encoded. Alternatively, the data to be sent may also be the sequence of the above-mentioned information elements after processing, so that the terminal determines the processed sequence as the sequence to be encoded. For example, the processed sequence may be a sequence output after TB-CRC check, a sequence output after the same or different CB encoding, or a sequence that is punctured (or not transmitted) after CB encoding. Taking LDPC coding as an example, the terminal may determine the bits of key information through a density evolution algorithm, and determine the sequence constructed by the punctured bits in these bits as the sequence to be encoded, so that it can be carried by the reference signal later. This can accelerate decoding convergence and improve decoding performance.

[0202] In addition, the source information of the data to be sent (such as generation method, extraction location, combination method after extraction, etc.) can be configured by the network device, or it can be predefined by the protocol. In either case, the network device and the terminal are aligned, so that the network device can demodulate the data to be sent.

[0203] Configuration parameters can also be obtained by the terminal from the network device. For example, the network device can send the configuration parameters, and the terminal can receive the configuration parameters accordingly. Alternatively, the configuration parameters can be pre-configured or pre-defined in the terminal by the protocol. In this case, the network device does not need to send the configuration parameters, and the terminal does not need to receive the configuration parameters.

[0204] It should be understood that since the coding input length and coding output length indicated by the configuration parameters can be pre-aligned between the terminal and the network device, the terminal performs error correction coding according to the configuration information, such as the established coding input length and coding output length, to avoid decoding failure due to coding format errors.

[0205] In addition, when the first sequence to be encoded and the configuration parameters are both obtained from the network device, the first sequence to be encoded and the configuration parameters can be carried in the same message to reduce the number of communications and reduce communication overhead, or they can be carried in different messages respectively to achieve decoupling and more flexible information element transmission.

[0206] It is also understood that the principle of the terminal performing error correction coding on the first sequence to be encoded is similar to that of the above-described scenario 1, which can be referred to for understanding and will not be further described. Furthermore, after obtaining the first information, the terminal can also divide the first information into M segments to obtain M pieces of indication information. The principle of this is also similar to that of the above-described scenario 1, which can also be referred to for understanding and will not be further described.

[0207] It can also be understood that the difference between the above situations 1-3 and situation 4 is that if the network device generates and configures the corresponding indication information for the terminal, it can be understood that the network device can know that the terminal corresponds to the indication information. Then, when the network device receives the reference signal, it can determine which terminal the reference signal comes from based on the indication information corresponding to the reference channel. However, if the terminal generates the indication information by itself, different terminals may also generate the same indication information, so the network device may not be able to distinguish between each terminal through the indication information. In this case, the network device can perform upper-layer decoding on the data for scheduling-free transmission (such as the identifier of the terminal carried by the data) to distinguish between each terminal.

[0208] Optionally, in combination with the above cases 1 to 4, the network device can also dynamically configure the complexity of the error correction code, and then execute it by itself or configure it to the terminal to adapt to different scenario requirements. The higher the complexity, the stronger the error correction capability and the longer the processing delay. Conversely, the weaker the error correction capability and the shorter the processing delay.

[0209] For example, in low-load scenarios, user access demands are low and pilot collisions are small. High-complexity error correction coding will lead to excessive access delays, so low-complexity error correction coding is needed. For another example, in high-load scenarios, user access demands are high and pilot collisions are severe. Low-complexity error correction coding may not be able to correct complex error patterns, affecting user access. Therefore, high-complexity error correction coding with better error correction capabilities is needed. To this end, network devices can preset multiple checksum functions with different error correction capabilities. To cope with different scenarios conflict requirements. For example, the verification function For low-load scenarios, check function Corresponding to high load scenarios. In this way, network devices can select appropriate For example, when the network load level is higher than a preset threshold, the network device can choose to Otherwise, when the network load level is lower than the preset threshold, the network device can choose

[0210] It's understandable. and It can also be a different error correction code, such as a repetition code of the same length, such as RM code. Or, and It can also be a different code rate design under the same error correction coding, such as Rm(1,3) and Rm(2,3), which have the same code length but different code rates of 0.5 and 0.875 respectively, to support 8 different terminals (or users).

[0211] S402:

[0212] When a network device combines bit maps corresponding to received reference signals, if the network device does not know the length of the bit sequence obtained through error correction coding, the network device may use an exhaustive approach to combine bit maps corresponding to different numbers of time-frequency resources, such as combining bit maps corresponding to reference signals received on two time-frequency resources, combining bit maps corresponding to reference signals received on three time-frequency resources, and combining bit maps corresponding to reference signals received on four time-frequency resources, to obtain multiple bit sequences of different lengths. If the network device knows the length of the bit sequence obtained in advance through error correction coding, the network device may determine the number of time-frequency resources corresponding to that length and combine the bit maps corresponding to these numbers of time-frequency resources, such as combining bit maps corresponding to reference signals received on four time-frequency resources, to obtain multiple bit sequences of that length.

[0213] The network device can perform error correction decoding on the multiple bit sequences obtained by combining. The error correction decoding can be performed by the decoding function Indicates. The error correction decoding may correspond to the above-mentioned error correction coding, including at least one of the following: linear channel error correction decoding, nonlinear channel error correction decoding, or check decoding. For example, the linear channel error correction decoding may include any one of the following: RM code, polar code, low-density parity check code. For another example, the nonlinear channel error correction decoding may include a hash code. The check decoding may include a CRC code. If the above-mentioned error correction coding is a single error correction coding, the network device performs a single error correction decoding corresponding to the single error correction coding. For example, if the error correction coding is a CRC coding, the network device performs CRC decoding on each bit sequence in the above-mentioned multiple bit sequences. If the above-mentioned error correction coding is a cascade of multiple error correction codings, the network device performs a cascade of multiple error correction decodings corresponding to the cascade of multiple error correction codings. For example, if the multi-error correction coding cascade is CRC encoding first, then RM encoding, CRC encoding first, then polar coding, or CRC encoding first, then LDPC coding, the network device can first perform RM decoding / polar decoding / LDPC decoding, and then CRC decoding.

[0214] If the bit sequence obtained by the above combination corresponds to (such as being identical or similar to) the bit sequence obtained by the above error correction coding, then error correction decoding thereof can obtain the bit sequence obtained by the above error correction coding, that is, the first information; otherwise, error correction decoding cannot output a result.

[0215] For ease of understanding, we continue to use the above example as an example.

[0216] The network device receives: {reference signal 1, reference signal 3, reference signal 5} on RB1, the network device receives: {reference signal 4, reference signal 11, reference signal 8} on RB2, the network device receives: {reference signal 15, reference signal 2, reference signal 13} on RB3, and the network device receives: {reference signal 7, reference signal 15, reference signal 12} on RB4.

[0217] If the network device does not know the length of the bit sequence obtained by error correction coding, the network device can combine with a granularity of 2 RBs, a granularity of 3 RBs, and a granularity of 4 RBs to obtain multiple bit sequences with lengths of 8 / 12 / 16 bits respectively. Alternatively, if the network device knows the length of the bit sequence obtained by error correction coding, the network device can combine with a granularity of a determined number of RBs. For example, if the length is 8 bits and the bitmap corresponding to each RB is 4 bits, then 2 RBs are required for combination to obtain multiple bit sequences with a length of 8 bits. For another example, if the length is 16 bits and the bitmap corresponding to each RB is 4 bits, then 4 RBs are required for combination to obtain multiple bit sequences with a length of 16 bits.

[0218] Later, during error correction decoding, if N = 1, the bit sequence obtained by combining the bitmaps of {reference signal 3 on RB1, reference signal 4 on RB2, reference signal 13 on RB3, reference signal 15 on RB4} can be decoded normally, or in other words, it satisfies the check function Verification is performed, and the output is 0011010011011111. Alternatively, if N = 2, the bit sequence obtained by combining the bit patterns of {reference signal 3 on RB1, reference signal 4 on RB2} can be error-corrected and decoded, and the output is 00110100. Similarly, the bit sequence obtained by combining the bit patterns of {reference signal 13 on RB3, reference signal 15 on RB4} can be error-corrected and decoded, and the output is 11011111. However, the bit sequence obtained by combining the bit patterns of {reference signal 1 on RB1, reference signal 3 on RB2, reference signal 15 on RB3, reference signal 7 on RB4} cannot be error-corrected and decoded, and no result can be output.

[0219] It can be understood that since error correction decoding has the function of error correction, such as correcting the erroneous bits in the scheduling-free transmission process to obtain the correct bits, it can resist sudden errors, reduce error propagation, and avoid false alarms and missed detections. Taking RM code as an example, setting This means that each terminal can detect two bit errors and correct one bit error. For a multi-terminal scenario with four RBs, each supporting two reference signals, such as eight terminals, the reference signal pattern before error correction for the eight terminals can be shown in Figure 5, and the reference signal pattern after error correction can be shown in Figure 6. In Figures 5 and 6, 0 / 1 represent reference signal 0 or reference signal 1, respectively.

[0220] The method provided by the embodiment of the present application is described in detail above in conjunction with Figures 4 to 6. The communication device for executing the communication method provided by the embodiment of the present application is described in detail below in conjunction with Figures 7 and 8.

[0221] Figure 7 is a structural diagram of a communication device according to an embodiment of the present application. As shown in Figure 7 , the communication device 700 includes a transceiver module 701 and a processing module 702. For ease of illustration, Figure 7 only shows the main components of the communication device.

[0222] The transceiver module 701 is used to perform the transceiver function of the method shown in FIG. 4 , and the processing module 702 is used to perform other functions of the method shown in FIG. 4 except the transceiver function.

[0223] Optionally, the transceiver module 701 may include a sending module (not shown in FIG7 ) and a receiving module (not shown in FIG7 ). The sending module is used to implement the sending function of the communication device 700 , and the receiving module is used to implement the receiving function of the communication device 700 .

[0224] Optionally, the communication device 700 may further include a storage module (not shown in FIG. 7 ) storing a program or instruction. When the processing module 702 executes the program or instruction, the communication device 700 may perform the functions of the terminal or network device in the methods shown in FIG. 4 to FIG. 6 .

[0225] It can be understood that the communication device 700 can be a terminal or a network device, or a chip (system) or other parts or components that can be set in a terminal or a network device, or a device that includes a terminal or a network device. This application does not limit this.

[0226] In addition, the technical effects of the communication device 700 can refer to the technical effects of the methods shown in Figures 4 to 6, and will not be repeated here.

[0227] FIG8 is a second structural diagram of a communication device provided in an embodiment of the present application. Exemplarily, the communication device may be a terminal, or a chip (system) or other component or assembly that can be provided in a terminal. As shown in FIG8 , the communication device 800 may include a processor 801. Optionally, the communication device 800 may further include a memory 802 and / or a transceiver 803. The processor 801 is coupled to the memory 802 and the transceiver 803, such as by a communication bus.

[0228] The following is a detailed introduction to the various components of the communication device 800 in conjunction with FIG8 :

[0229] The processor 801 is the control center of the communication device 800 and can be a single processor or a collective term for multiple processing elements. For example, the processor 801 can be one or more central processing units (CPUs), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more digital signal processors (DSPs) or one or more field programmable gate arrays (FPGAs).

[0230] Optionally, the processor 801 may execute various functions of the communication device 800 by running or executing a software program stored in the memory 802 and calling data stored in the memory 802, such as executing the rate matching method shown in FIG. 4 above.

[0231] In a specific implementation, as an embodiment, the processor 801 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG8 .

[0232] In a specific implementation, as an embodiment, the communication device 800 may also include multiple processors, such as the processor 801 and the processor 804 shown in FIG8 . Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0233] The memory 802 is used to store the software program for executing the solution of the present application, and the execution is controlled by the processor 801. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0234] Alternatively, the memory 802 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium 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 can be accessed by a computer, but is not limited thereto. The memory 802 may be integrated with the processor 801 or exist independently and be coupled to the processor 801 via an interface circuit (not shown in FIG8 ) of the communication device 800. This embodiment of the present application does not specifically limit this.

[0235] Transceiver 803 is used for communication with other communication devices. For example, if communication device 800 is a terminal, transceiver 803 can be used to communicate with a network device or another terminal device. For another example, if communication device 800 is a network device, transceiver 803 can be used to communicate with a terminal or another network device.

[0236] Optionally, the transceiver 803 may include a receiver and a transmitter (not shown separately in FIG8 ), wherein the receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0237] Optionally, the transceiver 803 may be integrated with the processor 801 or exist independently and be coupled to the processor 801 through an interface circuit (not shown in FIG. 8 ) of the communication device 800 . This embodiment of the present application does not specifically limit this.

[0238] It is understandable that the structure of the communication device 800 shown in FIG8 does not constitute a limitation on the communication device, and an actual communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0239] In addition, the technical effects of the communication device 800 can refer to the technical effects of the methods described in the above method embodiments, and will not be repeated here.

[0240] An embodiment of the present application also provides a chip, which includes at least one controller and at least one interface circuit. The at least one controller and the at least one interface circuit can be interconnected via lines. The controller is used to support the chip system to implement the various functions or steps in the above method embodiments, and the at least one interface circuit can be used to receive signals from other devices (such as communication interfaces, radio frequency generation circuits, power amplification systems, antennas, etc.), or to send signals to other devices (such as communication interfaces, radio frequency generation circuits, power amplification systems, antennas, etc.). The chip system may include a chip and may also include other discrete devices.

[0241] It should be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0242] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0243] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (such as infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0244] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. A and B can be singular or plural. Furthermore, the character " / " as used herein generally indicates an "or" relationship between the associated objects, but it may also indicate an "and / or" relationship. For specific understanding, please refer to the context.

[0245] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0246] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0247] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0248] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0249] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0250] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0251] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0252] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the current related technology or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0253] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: The method comprises: Obtaining first information through error correction coding; Determine M indication information, where the M indication information is used to indicate M reference signals corresponding to the scheduling-free resources; the M indication information corresponds one-to-one to M segments, where the M segments are obtained by dividing the first information into M segments, and M is an integer greater than 1, The M reference signals are sent on the scheduling-free resources according to the M indication information.

2. The method according to claim 1, characterized in that The obtaining of the first information by error correction coding includes: The first information is obtained by performing error correction coding on the first sequence to be encoded.

3. The method according to claim 2, characterized in that The error correction coding includes at least one of the following: linear channel error correction coding, non-linear channel error correction coding, or parity coding.

4. The method according to claim 2 or 3, characterized in that: The step of obtaining first information by performing error correction coding on the first sequence to be coded includes: According to the configuration parameters required for error correction coding, error correction coding is performed on the first sequence to be encoded to obtain the first information.

5. The method according to any one of claims 2 to 4, characterized in that: The method further comprises: The first sequence to be encoded is received, or the first sequence to be encoded is determined.

6. The method according to claim 5, characterized in that The step of determining the sequence to be encoded comprises: A sequence corresponding to the data to be sent is determined as the first sequence to be encoded.

7. The method according to any one of claims 1 to 6, characterized in that The method further comprises: Receive location information; wherein the location information is used to indicate the locations of the M segments in the first information; The determining of M indication information includes: According to the location information, the first information is divided into M segments to obtain the M indication information.

8. The method according to any one of claims 1 to 7, characterized in that The scheduling-free resources include M time-frequency resources, and each of the M time-frequency resources is used to carry a corresponding reference signal of the M reference signals.

9. The method according to claim 8, characterized in that The method further comprises: Receive a correspondence between the M time-frequency resources and the M indication information; The sending the M reference signals on the scheduling-free resources according to the M indication information includes: The M reference signals are sent on the M time-frequency resources according to the M indication information and the corresponding relationship.

10. The method according to any one of claims 1 to 9, characterized in that The first information includes N bit sequences, where N is a positive integer. The M segments are obtained by dividing the jth bit sequence in the N bit sequences into mj segments, where j traverses from 1 to N. A bit map contained in each of the M segments is used as an indication information.

11. The method according to claim 10, characterized in that The j-th bit sequence is expressed as follows: Among them, c j represents the i-th bit sequence, c p,i represents the i-th bitmap, i is any integer from 1 to mj, F2 represents a finite 2-element domain, CN p Indicates that the i-th bitmap includes N p bits, N p is an integer greater than 1.

12. The method according to claim 10 or 11, characterized in that: The bit sequence is any one of the following: RM code, polar code, low-density parity check LDPC code, hash code, or cyclic redundancy check CRC code.

13. A communication method, characterized in that: The method comprises: receiving a reference signal on the scheduling-free resource; Performing error correction decoding on the information used to indicate the reference signal to obtain first information, wherein M segments are obtained by dividing the first information into M segments, the M segments correspond one-to-one to the M indication information, and the M indication information is used to indicate that the reference signals received on the scheduling-free resource are M reference signals, and M is an integer greater than 1; The scheduling-free transmission is decoded using the first information.

14. The method according to claim 13, characterized in that Before receiving the reference signal on the scheduling-free resource, the method further includes: Performing error correction coding on the first sequence to be encoded to obtain the first information; The first information is sent.

15. The method according to claim 14, characterized in that The method further comprises: Sending position information; the position information is used to indicate the positions of the M segments in the first information.

16. The method according to claim 13, characterized in that Before receiving the reference signal on the scheduling-free resource, the method further includes: Performing error correction coding on the first sequence to be encoded to obtain the first information; Divide the first information into M segments to obtain the M indication information; Send the M indication information.

17. The method according to claim 13, characterized in that Before receiving the reference signal on the scheduling-free resource, the method further includes: Perform error correction coding on a plurality of sequences to be encoded respectively to obtain a plurality of information, wherein the plurality of information includes the first information, and the plurality of information is respectively used to indicate a reference signal corresponding to the scheduling-free resource; The plurality of information is sent.

18. The method according to claim 17, characterized in that The method further comprises: An information index is sent, where the information index is used to indicate the first information among the multiple information.

19. The method according to claim 13, characterized in that Before receiving the reference signal on the scheduling-free resource, the method further includes: The configuration parameters required for error correction coding are sent to the terminal.

20. The method according to claim 19, characterized in that The method further comprises: A first sequence to be encoded for error correction encoding is sent.

21. The method according to any one of claims 13 to 20, characterized in that: The scheduling-free resources include M time-frequency resources, and each of the M time-frequency resources is used to carry a corresponding reference signal of the M reference signals.

22. The method according to claim 21, characterized in that Before receiving the reference signal on the scheduling-free resource, the method further includes: Sending a correspondence between the M time-frequency resources and the M indication information to the terminal; Receiving a reference signal on the scheduling-free resource includes: A reference signal is received on the M time-frequency resources.

23. The method according to any one of claims 13 to 22, characterized in that The first information includes N bit sequences, where N is a positive integer. The M segments are obtained by dividing the jth bit sequence in the N bit sequences into mj segments, where j traverses from 1 to N. A bit map contained in each of the M segments is used as an indication information.

24. The method according to claim 23, characterized in that The j-th bit sequence is expressed as follows: Among them, c j represents the i-th bit sequence, c p,i represents the i-th bitmap, i is any integer from 1 to mj, F2 represents a finite 2-element domain, CN p Indicates that the i-th bitmap includes N p bits, N p is an integer greater than 1.

25. The method according to claim 23 or 24, characterized in that The bit sequence is any one of the following: RM code, polar code, low-density parity check LDPC code, hash code, or cyclic redundancy check CRC code.

26. The method according to any one of claims 13 to 25, characterized in that The complexity of the error correction coding is positively correlated with the number of devices that multiplex the scheduling-free resources.

27. A communication device, characterized in that: The apparatus comprises: a module for executing the method as claimed in any one of claims 1-26.

28. A communication device, characterized in that: The communication device comprises: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method according to any one of claims 1-26.

29. A chip, characterized in that: The chip comprises: a controller and an interface circuit, wherein the controller is used to interact with other devices through the interface circuit to execute the method according to any one of claims 1-26.

30. A computer-readable storage medium, characterized in that: The computer-readable storage medium comprises a computer program or instructions, and when the computer program or instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 26.

31. A computer program product, characterized in that The method comprises a computer program or an instruction, which, when executed on a computer, causes the computer to execute the method according to any one of claims 1 to 26.

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