A communication method, apparatus, storage medium, and program product

Abstract

This disclosure provides a communication method, apparatus, storage medium, and program product, relating to the field of communication technology, which can effectively improve the reception performance of a common channel. The method is applied to a first communication node and includes: receiving at least one demodulation reference signal from P demodulation reference signals of a common channel, wherein the P demodulation reference signals correspond to H sets of data modulation symbols, and the H sets of data modulation symbols correspond to the same common information, where P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P; and based on the received at least one demodulation reference signal, detecting the data modulation symbol set corresponding to the at least one demodulation reference signal to obtain the common information.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a communication method, apparatus, storage medium, and program product. Background Technology

[0002] Currently, in wireless communication systems, transmitting and receiving nodes can transmit system information or synchronization signals through a common channel, and the common channels transmitted by different transmitting nodes (such as base stations) are independent of each other.

[0003] However, in future distributed scenarios, as cells become increasingly dense, receiving nodes (such as terminals) need to receive the common channels independently transmitted by each sending node in sequence, resulting in frequent cell handover for receiving nodes.

[0004] Therefore, how to transmit common channels in distributed scenarios, improve the reception performance of common channels, and avoid frequent cell handover of receiving nodes has become an urgent technical problem to be solved. Summary of the Invention

[0005] This disclosure provides a communication method, apparatus, storage medium, and program product that can effectively improve the reception performance of common channels and avoid frequent cell handovers by receiving nodes.

[0006] On the one hand, a communication method is provided, which is applied to a first communication node, comprising: receiving at least one demodulation reference signal from P demodulation reference signals of a common channel, wherein the P demodulation reference signals correspond to H sets of data modulation symbols, and the H sets of data modulation symbols correspond to the same common information, wherein P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P; and based on the received at least one demodulation reference signal, detecting the set of data modulation symbols corresponding to the at least one demodulation reference signal to obtain the common information.

[0007] On the other hand, a communication method is provided, which is applied to a second communication node, including: transmitting P demodulation reference signals of a common channel, wherein the P demodulation reference signals correspond to H sets of data modulation symbols, and the H sets of data modulation symbols correspond to the same common information, where P is an integer greater than or equal to 1 and H is a positive integer less than or equal to P.

[0008] On the other hand, a communication device is provided for use in a first communication node, the device comprising: a receiving module and a processing module.

[0009] The receiving module is used to receive at least one demodulation reference signal from P demodulation reference signals of a common channel. The P demodulation reference signals correspond to H sets of data modulation symbols, and the H sets of data modulation symbols correspond to the same common information. P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P. The processing module is used to detect the set of data modulation symbols corresponding to the at least one demodulation reference signal based on the received at least one demodulation reference signal to obtain the common information.

[0010] On the other hand, a communication device is provided for use in a second communication node, the device comprising: a transmitting module.

[0011] The transmitting module is used to transmit P demodulation reference signals of the common channel. The P demodulation reference signals correspond to H sets of data modulation symbols. The H sets of data modulation symbols correspond to the same common information. P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P.

[0012] In another aspect, a communication device is provided, comprising: a memory and a processor. The memory and the processor are coupled. The memory is used to store a computer program. When the processor executes the computer program, it implements the communication method of any of the above embodiments.

[0013] In another aspect, a computer-readable storage medium is provided, on which computer program instructions are stored, which, when executed by a processor, implement the communication method of any of the above embodiments.

[0014] In another aspect, a computer program product is provided, which includes computer program instructions that, when executed, implement the communication method of any of the above embodiments.

[0015] This disclosure presents an embodiment in which P demodulation reference signals of a common channel correspond to H sets of data modulation symbols, and the H sets of data modulation symbols correspond to the same common information. This allows for correlation between the common channel data modulation symbol sets corresponding to multiple demodulation reference signals, or allows one common channel demodulation reference signal to correspond to more than one synchronization signal. By comprehensively considering the spatial deep fading problem, interference, load, and terminal complexity of the common channel, the receiving performance of the common channel can be effectively improved, while minimizing interference and load on the common channel and avoiding frequent cell handovers by the receiving node. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of a communication system provided for some embodiments of this disclosure;

[0018] Figure 2 A schematic diagram illustrating the transmission of a common channel or synchronization signal by three access points (APs) according to some embodiments of this disclosure;

[0019] Figure 3 This is a schematic diagram illustrating an example of a time-frequency resource set corresponding to a common channel of three APs provided in some embodiments of this disclosure;

[0020] Figure 4 A flowchart illustrating a communication method provided in some embodiments of this disclosure;

[0021] Figure 5 This is a schematic diagram of another communication system provided for some embodiments of the present disclosure;

[0022] Figure 6 A flowchart illustrating another communication method provided in some embodiments of this disclosure;

[0023] Figure 7 A flowchart illustrating another communication method provided in some embodiments of this disclosure;

[0024] Figure 8 A schematic diagram of the structure of a communication device provided in some embodiments of this disclosure. Figure 1 ;

[0025] Figure 9 A schematic diagram of the structure of a communication device provided in some embodiments of this disclosure. Figure 2 ;

[0026] Figure 10 A schematic diagram of the structure of a communication device provided in some embodiments of this disclosure. Figure 3 . Detailed Implementation

[0027] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0028] It should be noted that, in this disclosure, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0029] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0030] In the description of this disclosure, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "more than one" means two or more.

[0031] Currently, in wireless communication systems, transmitting and receiving nodes can transmit system information or synchronization signals through a common channel, and the common channels transmitted by different transmitting nodes (such as base stations) are independent of each other.

[0032] However, in future distributed scenarios, as cells become increasingly dense, receiving nodes (such as terminals) need to receive the common channels independently transmitted by each sending node in sequence, resulting in a large load and interference on the common channels transmitted by several neighboring sites, and frequent cell handover for receiving nodes.

[0033] Therefore, how to transmit a common channel in a distributed scenario and effectively improve the reception performance of the common channel has become a technical problem that urgently needs to be solved.

[0034] It should be noted that, in the embodiments disclosed herein, "distributed" means that a terminal requires services from multiple nodes (also referred to as multiple base stations), and / or multiple nodes need to coordinate resources.

[0035] Based on this, to solve the above-mentioned technical problems, this disclosure provides a communication method applied to a distributed common channel transmission scenario. By assigning P common channel demodulation reference signals to H data modulation symbol sets, a correlation is established between the common channel data modulation symbol sets corresponding to multiple demodulation reference signals, or by assigning one common channel demodulation reference signal to more than one synchronization signal. Taking into account the data spatial deep fading problem, interference, load, and terminal detection complexity of the common channel, the proposed solution can effectively improve the reception performance of the common channel, minimize interference and load of the common channel, and avoid frequent cell handover of the receiving node.

[0036] In this embodiment of the disclosure, the network architecture of the mobile communication network (including but not limited to 2G, 3G, 4G, 5G and future mobile communication networks (such as the evolution of the fifth generation mobile communication technology (5G-A), the sixth generation mobile communication technology (6G)), and the seventh generation mobile communication technology (7G)) may include at least a first communication node and a second communication node, which may be referred to as the first node and the second node, respectively.

[0037] For example, such as Figure 1 The diagram shown is a schematic of a communication system provided in an embodiment of this disclosure. The communication system may include: a first communication node 101 and a second communication node 102.

[0038] In this system, the second communication node sends a common channel to the first communication node. The P demodulation reference signals of the common channel correspond to H sets of data modulation symbols, and these H sets of data modulation symbols correspond to the same common information. The second communication node sends one set of data modulation symbols from the H sets of data modulation symbols corresponding to each of the P demodulation reference signals at the port of that demodulation reference signal. The first communication node receives at least one demodulation reference signal from the P demodulation reference signals. Based on the received at least one demodulation reference signal, it receives one or more sets of data modulation symbols corresponding to the at least one demodulation reference signal from the H sets of data modulation symbols, thereby detecting the common information. P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P.

[0039] The first communication node 101 can receive at least one demodulation reference signal from among P demodulation reference signals of the common channel, and based on the received at least one demodulation reference signal, detect the set of data modulation symbols corresponding to the at least one demodulation reference signal to obtain common information.

[0040] It should be noted that, in this embodiment of the disclosure, the common channel includes at least one of the following:

[0041] Broadcast channels (such as physical broadcast channels (PBCH));

[0042] The common control channel for notifying system messages (such as control resource reset 0: CORESET0, and / or the physical downlink control channel (PDCCH) that schedules the physical downlink shared channel (PDSCH) which includes common information);

[0043] PDSCH includes public information;

[0044] Random access related channels.

[0045] Public information includes at least one of the following:

[0046] System messages (such as system information blocks (SIBs));

[0047] Response information for random access;

[0048] Broadcast information;

[0049] Configuration information for random access.

[0050] Furthermore, in this embodiment of the disclosure, the first communication node 101 can be a receiving node, such as a passive IoT device, tag, or terminal. The second communication node 102 can be a sending node, such as a base station, auxiliary node, or intermediate node.

[0051] In this context, a base station (BS) can be a base station in LTE, Long Term Evolution Advanced (LTEA) or an evolved Node B (eNB or eNodeB), a base station device (gNB) in a 5G network, or a base station in a future communication system. Base stations can include various macro base stations, micro base stations, femtocell base stations, wireless remote extensions, reconfigurable intelligent surfaces (RISS), routers, relay stations, transmission and reception points (TRPs), receivers, access points (APs), wireless fidelity (Wi-Fi) devices, and other network-side equipment. A base station can sometimes also be referred to as a reader or reader used for communication with terminals.

[0052] A terminal can be a device with wireless transceiver capabilities. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, virtual reality (VR) terminals, augmented reality (AR) terminals, wireless terminals in industrial control, wireless terminals in self-driving vehicles, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and so on. The embodiments of this disclosure do not limit the application scenarios. A terminal may also be referred to as a user, user equipment (UE), A-IoT device, access terminal, UE unit, UE station, mobile station, mobile station, remote station, transmitter, remote terminal, mobile device, UE terminal, wireless communication device, UE agent, or UE device, etc., and the embodiments of this disclosure do not limit this to these terms.

[0053] In some embodiments, there can be multiple second communication nodes 102. Multiple second communication nodes 102 can jointly send the same public information. For example, each of the P second communication nodes 102 sends a set of data modulation symbols on a demodulation reference signal port of a common channel. The P common channel demodulation reference signals sent by the P second communication nodes correspond to H sets of data modulation symbols. The H sets of data modulation symbols correspond to the same public information. When H is less than P, at least two of the P common channel demodulation reference signals sent by the P second communication nodes correspond to the same set of data modulation symbols. That is, this same set of data modulation symbols is uploaded to each of the at least two common channel demodulation reference signals.

[0054] This allows multiple access points (APs) to transmit a common channel in a correlated rather than independent manner. Each AP can transmit the same pre-coded information bit sequence {c(0), c(1), ... c(E-1)}, or multiple APs can jointly transmit the same pre-coded information bit sequence {c(0), c(1), ... c(E-1)}. Here, E is a positive integer representing the number of bits in the information sequence, and c(i), i = 0, 1, ..., E-1, represents bits 0 and 1.

[0055] The purpose of this design is, on the one hand, to reduce the time and frequency overhead of the common channel, it is not necessary to send AP-level common information, but only AP group-level common information transmitted in the common channel. The terminal only needs to know the common information of its AP group. For example, the common information is shared and the same for multiple APs in the AP group.

[0056] On the other hand, to reduce the number of cell handovers for the terminal and the complexity of detecting common channels, the terminal maintains only one set of common information for an AP group. For example, this common information may include the common information of each AP in the AP group. When the terminal receives this common information under the coverage of any AP in the AP group, and moves from the first coverage area of ​​the first AP in the AP group to the second coverage area of ​​the second AP, the terminal does not need to reacquire the common information. For example, {c(0), c(1), ... c(E-1)} includes multiple bit subsets, each bit subset corresponding to a different AP in the AP group.

[0057] It should be noted that the different APs mentioned above can be distinguished by at least one of the following:

[0058] The sequence index of the synchronization signal;

[0059] The time-domain resources occupied by synchronization signals;

[0060] Frequency domain resources occupied by synchronization signals;

[0061] Demodulation reference signal for common channel.

[0062] For example, such as Figure 2 As shown, taking three access points (APs) as an example, AP1 uses beam 1 to transmit a common channel, AP2 uses beam 2 to transmit a common channel, and AP3 uses beam 3 to transmit a common channel. The signal model between the three APs and the terminal can be any of the following four models:

[0063] Signal Model 1: Y(x,y,z,k)=(H1(x,y,z,k)+H2(x,y,z,k)+H3(x,y,z,k))·s(k) Formula 1;

[0064] Signal Model 2: Y(x,y,z,k)=H1(x,y,z,k)·s1(k)+H2(x,y,z,k)·s2(k)+H3(x,y,z,k)·s3(k) Formula 2;

[0065] Signal Model 3: Y(x,y,z,k) i )=H i (x,y,z,k i )·s i (k i Formula 3, i = 1, 2, 3;

[0066] Signal Model 4: Y(x,y,z,k) i )=H i (x,y,z,k i )·s(k i Formula 4, i = 1, 2, 3.

[0067] Where H i (x,y,z,k), i=1,2,3 represents the channel response from APi to the receiver at spatial location (x,y,z) in the RE with resource element (RE) index k, where k=0,1,2....N-1, and k is the index of one of the multiple time-frequency resources (REs) occupied by the channel or signal. s(k) represents the modulation symbol transmitted on the RE with index k. i(k) represents the modulation symbol corresponding to the i-th channel or signal on the RE with index k. This signal includes at least one of the following: a demodulation reference signal for the common channel, a data signal for the common channel, or a synchronization signal. When it is a demodulation reference signal or a synchronization signal for the common channel, the modulation symbol can also be called a reference signal, that is, the modulation symbol is the modulation symbol agreed upon by the transmitter and receiver, and the receiver knows it before the transmitter sends the signal. When it is a data signal for the common channel, the modulation symbol carries the information that the transmitter wants to pass to the receiver. The modulation symbol is unknown to the receiver, and the receiver needs to demodulate it to know what modulation symbol the transmitter sent.

[0068] In signal model 3, signals from different APs are transmitted on different time-frequency resources, where k i It is the time-frequency resource index occupied by the i-th signal, and the modulation symbol set s of the three signals. i (k i The differences between signal model 4 and signal model 3 are that the modulation symbol set of the three signals is the same, which is s(k). i ), only at different time-frequency resources k i Send from above. k = 0, 1, ..., N-1, k i =0,1,...N-1, where N is the number of REs occupied by the signal.

[0069] In signal model 1, P APs transmit the same modulation symbol s(k) on the same time-frequency resource k. In signal model 2, three APs transmit a modulation symbol s on different demodulation reference signal ports on the same time-frequency resource k. i (k). Different demodulation reference signal ports correspond to different spatial resources, such as different access points (APs), or different precoding methods for the same AP or the same group of APs. Simply put, P demodulation reference signals enable the transmission of P modulation symbols on the same time-frequency resource k. These P modulation symbols arrive at the receiver via different spatial paths. If the spatial path discrimination is good enough, the receiver can successfully detect k modulation symbols on the same time-frequency resource k. Of course, the number of different modulation symbols among the P modulation symbols can be less than or equal to P, for example, H.

[0070] The modulation symbols on the P demodulation reference signal ports are usually referred to as P-stream signals. When the above signal model is applied to the demodulation reference signal of the common channel, in signal model 1, the common channel of the 3 synchronization signals (corresponding to 3 APs) occupies one demodulation reference signal port, and in signal model 2, the common channel of the 3 synchronization signals occupies 3 demodulation reference signal ports.

[0071] However, signal model 1 leads to unstable signal reception performance because the power of H1(x,y,z,k)+H2(x,y,z,k)+H3(x,y,z,k) varies at different (x,y,z) coordinates: at some (x,y,z) coordinates, the three channels are positively superimposed, resulting in very high received power for H1(x,y,z,k)+H2(x,y,z,k)+H3(x,y,z,k); at other (x,y,z) coordinates, the three channels are negatively superimposed, resulting in very low received power for H1(x,y,z,k)+H2(x,y,z,k)+H3(x,y,z,k)+H3(x,y,z,k)+H3(x,y,z,k). This phenomenon can be called spatial deep attenuation.

[0072] Signal Model 2 does not involve the superposition of multiple channels, so its signal reception stability is better than that of Signal Model 1. However, in Signal Model 1, when three channels are positively superimposed, the optimal gain of all three channels can be achieved. For example, assuming the average amplitude of each of the three channels is 1, the maximum power of the superimposed channels of the three APs in Signal Model 1 is 3. 2 =9, but when negative phases are superimposed, the gain may be 0. In signal model 2, a diversity gain of 3 with an average channel power can always be obtained.

[0073] In signal models 3 and 4, the signals from the three APs are transmitted on different time-frequency resources. Compared to signal model 3, signal model 4 transmits the same modulation symbol on different time-frequency resources, which reduces the detection complexity of the terminal. Furthermore, it can combine the signals from the three time-frequency locations to achieve combining gain, improving the detection performance of the modulation symbol. This combining can also be done before demodulating the modulation symbol, further reducing terminal complexity. If P signals contain the same pre-channel coded information bits but different modulation symbols, such as in signal model 2, for different i, s... i (k) are different, but s i (k) The set includes the same information bits c(j) before channel coding, and signal model 3, for different i, s i (k i ) are different, but s i (k i The set includes the same information bits c(j) before channel coding. The terminal can also combine P signals, but the combination is performed after modulation and before channel decoding. The combined information is sent to a channel decoder. That is, the combination at this time is bit-level combination before channel decoding. Therefore, the terminal must demodulate each signal first and then combine them, instead of combining them before demodulation as in signal model 4, so that demodulation can be performed once based on the combined signal.

[0074] Formulas 1-4 use P=3 as an example and can be generalized to any P, as in Formulas 5-8:

[0075] Signal Model 1:

[0076] Signal Model 2:

[0077] Signal Model 3: Y(x,y,z,k) i )=H i (x,y,z,k i )·s i (k i Formula 7, i = 0, 1, 2, 3... P-1;

[0078] Signal Model 4: Y(x,y,z,k) i )=H i (x,y,z,k i )·s(k i Formula 8, i = 0, 1, 2, 3... P-1

[0079] like Figure 3 As shown, if the signal is a data signal in a broadcast channel, then signal model 1 is as follows: Figure 3 In (a), P APs transmit the same PBCH modulation symbol set s(k) on the same time-frequency resources (i.e., one PBCH transmission opportunity includes one PBCH). Signal Model 2 is as follows. Figure 3 As shown in (b), P APs transmit P sets of modulation symbols s on P demodulation reference signal ports on the same time-frequency resources. i (k) (i.e., one PBCH transmission opportunity includes 3 PBCHs (such as PBCH1, PBCH2, and PBCH3)). Signal model 3 and signal model 4 can be as follows: Figure 3 As shown in (c) in the figure, Figure 3 The broadcast channel in (c) includes {PBCH1, PBCH2} and PBCH3 (i.e., transmission opportunity 1 of PBCH includes PBCH1 and PBCH2, and transmission opportunity 2 of PBCH includes PBCH3). {PBCH1, PBCH2} is signal model 2, and the area between {PBCH1, PBCH2} and PBCH3 is signal model 3 or signal model 4. Signal model 4 is defined when the modulation symbol set of PBCH3 and at least one of {PBCH1, PBCH2} is the same; otherwise, signal model 3 is used.

[0080] In summary, by comparing the above four signal models, we can obtain a comparative analysis of the characteristics of each signal model, including its advantages, disadvantages, and applicable scenarios, as shown in Table 1 below:

[0081] Table 1. Feature Comparison and Analysis of Signal Models

[0082]

[0083] In the following description, the common channel includes the common channel demodulated signal and the common channel data signal. The common channel data signal is obtained from common information, such as the common information {c(0), c(1), ... c(E-1)}, which is then channel-coded, scrambled, and modulated to obtain the common channel data modulation symbol set. This data modulation symbol set is transmitted on the common channel data signal. When the common channel includes multiple demodulation reference signals, each demodulation reference signal corresponds to a data modulation symbol set, which is transmitted on the spatial resources corresponding to the port of that demodulation reference signal. The P modulation symbol set on P demodulation reference ports can also be called P-stream data. A demodulation reference signal can be used to demodulate the data modulation symbol set transmitted on the port of that demodulation reference signal.

[0084] It should be noted that, Figure 1 This is just an example framework diagram. Figure 1 The number of devices included and the names of each device are unlimited, except for... Figure 1 In addition to the devices shown, the communication system may also include other devices, such as core network equipment.

[0085] The application scenarios of the embodiments disclosed herein are not limited. The system architecture and business scenarios described in the embodiments of this disclosure are for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of this disclosure. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this disclosure are also applicable to similar technical problems.

[0086] Figure 4 A flowchart of a communication method is shown, such as... Figure 4 As shown, this communication method is applied to the first communication node and includes:

[0087] S401. Receive at least one demodulation reference signal from the P demodulation reference signals of the common channel.

[0088] Wherein, P demodulation reference signals correspond to H sets of data modulation symbols, and H sets of data modulation symbols correspond to the same common information, where P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P.

[0089] In one implementation, each of the P demodulation reference signals corresponds to one of the H data modulation symbol sets, and each of the H data modulation symbol sets corresponds to at least one demodulation reference signal among the P demodulation reference signals. Each data symbol set is transmitted on a port corresponding to each demodulation reference signal in its at least one demodulation reference signal.

[0090] Specifically, for example, when a set of data modulation symbols corresponds to a demodulation reference signal, it means that they are on the same antenna port. The channel obtained from this demodulation reference signal can be used for demodulation of its corresponding set of data modulation symbols. When a set of data modulation symbols corresponds to more than one demodulation reference signal, it means that the set of data modulation symbols is repeatedly transmitted on multiple ports of more than one demodulation reference signal, or it means that different subsets of the set of data modulation symbols are transmitted on multiple ports of these multiple demodulation reference signals respectively.

[0091] Alternatively, it can be said that there is a one-to-one correspondence between the P demodulation reference signals and the P sets of data modulation symbols in the common channel. The number of different data modulation symbol sets in the P sets of data modulation symbols is H. Each set of data modulation symbols in the P sets of data modulation symbols is transmitted on the port of one of the demodulation reference signals in its corresponding P demodulation reference signals.

[0092] As one possible implementation, the set of H data modulation symbols corresponds to A different redundant versions, where A is a positive integer less than or equal to H. The A different redundant versions are A different redundant versions of the same public information in channel coding, where A is a positive integer less than or equal to P.

[0093] Furthermore, the P demodulation reference signals include A demodulation reference signal groups, and the A demodulation reference signal groups correspond one-to-one with A redundant versions.

[0094] It should be noted that A demodulation reference signal groups can satisfy any of the following:

[0095] The generation parameters of A demodulated reference signal groups and A scrambling sequences correspond one-to-one;

[0096] Each of the A demodulation reference signal groups corresponds to one or more scrambling sequence generation parameters. When A is greater than 1, different demodulation reference signal groups in the A demodulation reference signal groups correspond to different or the same scrambling sequence generation parameters.

[0097] A demodulation reference signal group corresponds to the generation parameters of a scrambling sequence.

[0098] In this embodiment of the disclosure, at least two of the H data modulation symbol sets have scrambling sequences that are determined based on the same generation parameter.

[0099] Alternatively, at least two of the H data modulation symbol sets have scrambling sequences that are determined based on different generation parameters.

[0100] As one possible implementation, the set of H data modulation symbols satisfies any of the following:

[0101] The H data modulation symbol set is obtained by dividing a first modulation symbol set into H subsets, where the first modulation symbol set is determined based on common information and the generation parameters of a scrambling sequence;

[0102] Each of the H sets of data modulation symbols is obtained separately based on common information, wherein any two sets of data modulation symbols in the H sets of data modulation symbols are different;

[0103] H equals 1, and each of the P demodulation reference signals corresponds to the same set of data modulation symbols.

[0104] In some embodiments, the j-th demodulation reference signal group in A demodulation reference signal groups includes P j P is a demodulation reference signal and H data modulation symbol sets. j P corresponding to each demodulated reference signal j The data modulation symbol sets are respectively in P j Received on the port corresponding to each demodulation reference signal, and P j A set of data modulation symbols is formed by dividing a first set of modulation symbols into P. j A subset is obtained;

[0105] Here, a first modulation symbol set is obtained based on common information, the generation parameters of a scrambling sequence, and a redundant version. A redundant version is a redundant version corresponding to the j-th demodulated reference signal group among A redundant versions, P j Let J be a positive integer less than or equal to P, where j ∈ {1....A}, and P j It is a positive integer less than or equal to P.

[0106] In some embodiments, the j-th demodulation reference signal group in A demodulation reference signal groups includes P j P is a demodulation reference signal and H data modulation symbol sets. j P corresponding to each demodulated reference signal j The data modulation symbol sets are respectively in P j Received on the port corresponding to the demodulation reference signal;

[0107] Among them, P j The set of modulation symbols is formed by processing the first bit sequence through P... j The first bit sequence is obtained by scrambling and then modulating a scrambled sequence. It is derived from common information and a redundant version corresponding to the j-th demodulated reference signal group from A redundant versions. j A positive integer less than or equal to P, where P j Each scrambling sequence corresponds to P j The generation parameters of the scrambling sequence, j∈{1....A}, P j It is a positive integer less than or equal to P.

[0108] In some embodiments, the j-th demodulation reference signal group in A demodulation reference signal groups includes P j P is a demodulation reference signal and H data modulation symbol sets. j A set of data modulation symbols corresponding to a demodulation reference signal is in P. j Received on each port corresponding to the demodulation reference signal;

[0109] In this set of data modulation symbols, a first bit sequence is obtained by scrambling it with a scrambling sequence and then modulating it. The first bit sequence is obtained based on common information and a redundant version corresponding to the j-th demodulation reference signal group in A redundant versions. j Let J be a positive integer less than or equal to P, where j ∈ {1....A}, and P j It is a positive integer less than or equal to P.

[0110] It should be noted that in the above embodiments, A demodulation reference signal groups correspond to one time-frequency resource set; or, A demodulation reference signal groups correspond to M time-frequency resource sets, where M is a positive integer less than or equal to P and greater than 1.

[0111] As one possible implementation, when A demodulation reference signal groups correspond to M time-frequency resource sets, the m-th time-frequency resource set among the M time resource sets corresponds to A in the A demodulation reference signal groups. m A demodulation reference signal group, of which A m Less than A, m∈{1,2,...,M}.

[0112] It should be noted that the P demodulation reference signals can satisfy at least one of the following:

[0113] Each of the P demodulation reference signals corresponds one-to-one with the P synchronization signals.

[0114] P demodulation reference signals correspond to one synchronization signal;

[0115] Of the P demodulation reference signals, some of the demodulation reference signals correspond to the synchronization signal, and the other demodulation reference signals correspond to the tracking reference signal.

[0116] The P demodulation reference signals include at least one first demodulation reference signal, and one of the first demodulation reference signals corresponds to at least two synchronization signals.

[0117] Based on the characteristics of the P demodulation reference signals described above, the P synchronization signals are determined according to at least one of the following:

[0118] Reservation rules;

[0119] Signaling information;

[0120] Parameters of the synchronization signal.

[0121] In other words, the communication method provided in this disclosure embodiment may further include at least one of the following:

[0122] P synchronization signals are determined according to the first predetermined rule;

[0123] According to the second predetermined rule, at least two synchronization signals are determined corresponding to a first demodulation reference signal;

[0124] A first demodulation reference signal corresponding to at least two synchronization signals is determined according to the third predetermined rule;

[0125] Receive first signaling information, wherein the first signaling information includes at least one of the following: P synchronization signals, at least two synchronization signals corresponding to a first demodulation reference signal, and a first demodulation reference signal corresponding to at least two synchronization signals;

[0126] Based on the parameters of the synchronization signals, at least one of the following is determined: P synchronization signals, at least two synchronization signals corresponding to a first demodulation reference signal, and a first demodulation reference signal corresponding to at least two synchronization signals.

[0127] As one possible implementation, the parameters of one of the P demodulation reference signals are obtained from the synchronization signal corresponding to that demodulation reference signal.

[0128] Wherein, a demodulation reference signal can be any one of P demodulation reference signals; or, a demodulation reference signal can be one of P demodulation reference signals; or, a demodulation reference signal can be any one of P demodulation reference signals belonging to a predetermined set.

[0129] It should be noted that the parameters of the demodulation reference signal may include at least one of the following:

[0130] Quasi-co-located reference signal;

[0131] Sequence parameters of a demodulated reference signal;

[0132] The time-domain resources occupied by a demodulation reference signal;

[0133] The frequency domain resources occupied by a demodulation reference signal;

[0134] The code domain resources occupied by a demodulation reference signal;

[0135] Large-scale channel parameters of a demodulated reference signal.

[0136] Furthermore, when multiple demodulation reference signals in P demodulation reference signals correspond to multiple synchronization signals, and multiple demodulation reference signals correspond to the generation parameters of a scrambling sequence, the parameters of the multiple synchronization signals all correspond to the generation parameters of a scrambling sequence.

[0137] In some embodiments, the synchronization signal corresponding to the demodulation reference signal may satisfy at least one of the following:

[0138] The P synchronization signals include at least two synchronization signals, and the physical cell indices corresponding to the different synchronization signals among the at least two synchronization signals are different.

[0139] The P synchronization signals include at least two synchronization signals, and the synchronization signal sequences corresponding to the different synchronization signals among the at least two synchronization signals are different.

[0140] When at least two of the P synchronization signals correspond to the same synchronization signal sequence and different synchronization signal blocks, the different modulation symbol sets in the H data modulation symbol sets corresponding to the at least two synchronization signals also include different common information.

[0141] When at least two of the P synchronization signals correspond to different synchronization signal sequences, the different data modulation symbol sets in the H data modulation symbol sets corresponding to the at least two synchronization signals only include the same common information and do not include different common information.

[0142] In some embodiments, the set of H data modulation symbols occupies a time-frequency resource set. In a time-frequency resource set, H data modulation symbols are received on P demodulation reference signal ports on each time-frequency resource. The P demodulation reference signals and P demodulation reference signal ports correspond one-to-one. One modulation symbol among the H data modulation symbols is received on each of the P demodulation reference signal ports. Each of the H data modulation symbols is received on one or more demodulation reference signal ports among the P demodulation reference signal ports. The H data modulation symbols belong to the set of H data modulation symbols respectively.

[0143] In some embodiments, H sets of data modulation symbols occupy M sets of time-frequency resources, where M is a positive integer less than or equal to P and greater than 1, and at least one set of data modulation symbols from the H sets of data modulation symbols is received on the time-frequency resource set of each of the M sets of time-frequency resources.

[0144] In the above embodiments, the resource multiplexing method of the P demodulation reference signals includes at least one of the following: time division multiplexing, frequency division multiplexing, and code division multiplexing.

[0145] Where the resource multiplexing method of the P demodulation reference signals includes code division multiplexing, at least two of the P demodulation reference signals adopt code division multiplexing, and at least two demodulation reference signals satisfy at least one of the following:

[0146] At least two demodulation reference signals correspond to the same master sequence, which is determined based on the parameters of one or more synchronization signals among the plurality of synchronization signals corresponding to the at least two demodulation reference signals.

[0147] At least two demodulation reference signals correspond one-to-one with at least two orthogonal covering codes;

[0148] Each of the at least two demodulation reference signals is determined by the product of the orthogonal covering code corresponding to each demodulation reference signal and the parent sequence.

[0149] Optionally, the P demodulation reference signals are determined based on at least one of the following:

[0150] Reservation rules;

[0151] Signaling information;

[0152] Parameters of the synchronization signal;

[0153] Parameters of the demodulation reference signal.

[0154] In other words, the communication method provided in this disclosure embodiment may further include at least one of the following:

[0155] P demodulation reference signals are determined according to predetermined rules (such as the fourth predetermined rule).

[0156] Receive second signaling information, wherein the second signaling information includes relevant information of P demodulation reference signals;

[0157] P demodulation reference signals are determined based on the parameters of the synchronization signal;

[0158] P demodulation reference signals are determined based on the parameters of the demodulation reference signals.

[0159] Furthermore, the same public information is the information bits before channel coding corresponding to the public channel; and / or, different data modulation symbol sets in the H data modulation symbol sets only include the same public information, and do not include different public information.

[0160] S402. Based on the received at least one demodulation reference signal, detect the set of data modulation symbols corresponding to the at least one demodulation reference signal to obtain common information.

[0161] It is understandable that by having P demodulation reference signals of a common channel correspond to H sets of data modulation symbols, and H sets of data modulation symbols correspond to the same common information, there is a correlation between the common channel data modulation symbol sets corresponding to multiple demodulation reference signals, or one common channel demodulation reference signal corresponds to more than one synchronization signal. Taking into account the spatial deep fading problem, interference, load and terminal complexity of the common channel, the reception performance of the common channel can be effectively improved, while minimizing the interference and load of the common channel and avoiding frequent cell handover of the receiving node.

[0162] The following section introduces several schemes (Scheme A to Scheme I) that can be used for the common channel, with specific examples.

[0163] Option A: A common channel includes P demodulation reference signal (DMRS) ports. Figure 2 In the context of P=3), this common channel corresponds to a redundant version of a codeword. The modulation symbols of this common channel are first mapped to the demodulation reference signal ports, and then mapped to the time-frequency resources, thereby obtaining the spatial diversity gain of the three demodulation reference signal ports. For example, {c(0),c(1),...c(E-1)} is channel-coded to obtain {a(0),a(1),...a(N*P*q-1)}, and then based on a scrambling sequence {b(0),b(1),...b(N*P*q-1)}, we obtain {a(0)+b(0),a(1)+b(1),...a(N*P*q-1)+b(N*P*q-1)}, where q is the modulation order, i.e., the number of bits corresponding to a modulation symbol. This sequence is modulated to obtain the set of modulation symbols {x(0),x(1),...,x(N*P-1)}, and the set of modulation symbols on each of the P demodulation reference signal ports is as follows:

[0164]

[0165] The above requirement stipulates that the number of modulation symbols included in {x(0),x(1),...,x(N*P-1)} must be an integer multiple of P; otherwise, some demodulation reference signal ports will have N modulation symbols, while others will have N-1. Where s i (k) represents the modulation symbol of the i-th demodulation reference signal port at resource RE index k. Preferably, the terminal can demodulate the modulation symbol set {x(0),x(1),...,x(N*P-1)} and decode {c(0),c(1),...c(E-1)} only when it receives all DMRS ports from the P DMRS ports.

[0166] For example, in the above Figure 2 In this scenario, a terminal at the intersection of three access points (APs) will not have poor reception performance on the common channel because it can receive the three demodulation reference signals sent by these three APs. However, if a terminal can only receive the signal from one AP, it cannot properly demodulate {x(0),x(1),...,x(N*P-1)}, resulting in poor reception performance of {c(0),c(1),...c(E-1)}, meaning the channel decoding performance of the common channel may be poor.

[0167] Therefore, this scheme is more suitable for situations where the target coverage areas of the signals transmitted by P APs highly overlap. The target coverage area of ​​an AP represents the geographical area where the target receiver of the signal transmitted by that AP is located. Moreover, since different demodulation reference signals correspond to different modulation symbols, the signal model of the P demodulation signals is one of signal model 2, 3, or 4. The P common channel data signals corresponding to the P demodulation reference signals correspond to signal model 2, which can avoid the spatial deep attenuation problem and make signal model 2 of the common channel data signals advantageous.

[0168] At this point, H can be considered as P, where one of the data modulation symbol sets is the set of data modulation symbols transmitted on a demodulation reference signal port, for example, s. i (k), i = 0, ..., P-1, for each i, s i (k) is a set of data modulation symbols, where different elements correspond to different k values.

[0169] Scheme B: Three common channels correspond to three demodulation reference signal ports. Each of the three common channels corresponds to one of these three demodulation reference signal ports. The data signal of each of the three common channels includes the same information {c(0), c(1), ... c(E-1)}. Each of these three channels is obtained based on {c(0), c(1), ... c(E-1)}. The redundant versions of the channel coding corresponding to these three common channels are the same, but the scrambling sequences before modulation are different. For example, {c(0), c(1), ... c(E-1)} becomes the sequence {a(0), a(1), ..., a(N*q-1)} after channel coding, where q has the same meaning as above, that is, the modulation order. Then, P demodulation reference signal ports correspond to P scrambling sequences. For example, the scrambling sequences corresponding to 3 demodulation reference signals are: {b0(0),b0(1),…,b0(N*q-1)}, {b1(0),b1(1),…,b1(N*q-1)}, {b2(0),b2(1),…,b2(N*q-1)}. Then, 3 sequences are formed according to the following method: {a(0)+b0(0),a(1)+b0(1),…,a(N*q-1)+b0(N*q-1)}, {a(0)+b1(0),a(1)+b1(0),b1(0)+ ... (1),…,a(N*q-1)+b1(N*q-1)},{a(0)+b2(0),a(1)+b2(1),…,a(N*q-1)+b2(N*q-1)},and thus form 3 different sets of modulation symbols: {s0(0),s0(1),…,s0(N-1)},{s1(0),s1(1),…,s1(N-1)},{s2(0),s2(1),…,s2(N-1)},The data signals of these 3 common channels occupy the same time and frequency resources, and the signal transmission model is signal model 2.

[0170] When the terminal receives the data signal corresponding to any one or more of the P demodulation reference signals, it can decode the bit sequence {a(0),a(1),...,a(N*q-1)}, and then obtain {c(0),c(1),...c(E-1)}. Furthermore, the P data modulation symbols corresponding to the P demodulation reference signal ports are located on the same time-frequency resources, conforming to signal model 2 shown in Formula 6 above. This avoids the problem of spatial deep attenuation of data signals in common channels. Moreover, when the terminal receives multiple of the P demodulation reference signals, it can decode the bit sequence {a(0),a(1),...c(E-1)} from these multiple demodulation reference signal ports. The soft information before channel decoding corresponding to {a(0), a(1), ..., a(N*q-1)} is soft-combined to improve decoding performance. This allows terminals in the cell center (e.g., receiving only one of the P demodulation reference signals) and terminals at the cell edge (e.g., receiving multiple of the P demodulation reference signals) to decode the common channel well. The former has a higher received power for a single demodulation reference signal, while the latter, due to the diversity gain of multiple demodulation reference signals, also has good received performance of the common channel. This results in relatively stable measurement performance of the common channel at different geographical locations. The bit sequences {a(0), a(1), ..., a(N*q-1)} corresponding to the three common channels are identical before scrambling after channel coding. When the three demodulation reference signals correspond to three synchronization signals transmitted by three APs, these three synchronization signals correspond to three physical cell indices. Three scrambling sequences are obtained based on these three physical cell indices. For example, the three physical cell indices are used to obtain the initialization parameters of the scrambling sequences, so that the terminal can decode the common channel without knowing which APs constitute an AP group. Alternatively, the three demodulation reference signals can correspond to three combinations of (physical cell index, synchronization signal block index). Each combination includes a physical cell index and a synchronization signal block index. The same physical cell index can correspond to one or more synchronization signal block indices. Different combinations of the three signals correspond to at least one of the following: physical cell index, synchronization signal block index. Three scrambling sequences are obtained based on these three combinations.

[0171] At this point, H can be considered as P, where one of the data modulation symbol sets is the set of data modulation symbols transmitted on a demodulation reference signal port, for example, s. i (k), i = 0, ..., P-1, for each i, s i (k) is a set of data modulation symbols, where different elements correspond to different k values.

[0172] Scheme C: Three common channels correspond to three demodulation reference signal ports, with each common channel corresponding to one of these three ports. The three common channels contain the same information, and the redundant versions of these channels are identical; in other words, these three common channels represent repeated transmissions of the same information. Furthermore, the scrambling sequence before modulation is also the same.

[0173] Specifically, for example, the common information bit sequence {c(0),c(1),...c(E-1)}, after channel coding, becomes the bit sequence {a(0),a(1),...,a(N*q-1)}, and the scrambling sequence becomes {b(0),b(1),...b(N*q-1)}. After scrambling, we get {a(0)+b(0),a(1)+b(1),...a(N*q-1)+b(N*q-1)}. After modulation, we get a set of modulation symbols {x(0),x(1),...,x(N-1)}. The set of data modulation symbols corresponding to each of the P demodulation reference signal ports is {s(0),s(1),...,s(N-1)}, as shown in the following formula:

[0174] s i (k)=x(k),k=0,1,...,N-1,i=0,1,...P-1 Formula 10.

[0175] At this point, the terminal can decode {x(0),x(1),...,x(N-1)} from any one of the P demodulation reference signal ports, and then decode {c(0),c(1),...c(E-1)}. When the terminal receives multiple of the P demodulation reference signal ports, it can also decode {s(0),s(1),...,s(N-1)}. Before channel decoding, {s(0),s(1),...,s(N-1)} on these multiple demodulation reference signal ports can be soft-combined to improve decoding performance. This allows terminals in the cell center (e.g., only receiving one of the P demodulation reference signals) and terminals at the cell edge (e.g., receiving multiple of the P demodulation reference signals) to decode the common channel well. The former has a higher received power for a single demodulation reference signal, while the latter, due to the diversity gain of multiple demodulation reference signals, also has good received performance of the common channel. P common channels can be located on the same time-frequency resources, and the signal model is shown in Signal Model 1. In this case, the data signal of the common channel suffers from spatial deep attenuation. However, since the demodulation reference signals corresponding to the P common channels are different (i.e., the signal model of the demodulation reference signal is one of Signal Models 2, 3, or 4), the terminal's receiving algorithm can reduce the spatial deep attenuation of the data signal of the common channel. For example, although the signal model of the data signal is Signal Model 1, the terminal can obtain the channel estimate H from each AP to the terminal based on the demodulation reference signal. i (x,y,z,k), if It's relatively large; the terminal can make the formula in formula six... if The power is less than H i (x,y,z,k), meaning multiple channels H occurred. i If (x,y,z,k) are negatively superimposed, then the terminal can make Y(x,y,z,k) / H i Given (x, y, z, k), we obtain estimates of s(k) for each of these values. Then, we combine the P estimates of s(k) to decode {c(0), c(1), ..., c(E-1)}. In this case, the demodulation reference signal is one of signal models 2, 3, or 4, but the data signal is signal model 1. This allows the data signal to acquire the advantages of signal model 1, and also partially alleviates the spatial deep decay problem in signal model 1.

[0176] In Scheme A above, it is called a common channel. Schemes B and C are called P common channels. Alternatively, Schemes B and C can also be called a common channel because the P common channels are highly correlated. The P common channels in Schemes B and C can replace the set of P data modulation symbols corresponding to the P demodulation reference signals of a common channel.

[0177] At this point, we can assume that H = 1, where one of the data modulation symbols is x(k), and x(k) is repeatedly transmitted on P demodulation reference signal ports.

[0178] In schemes D to F below, P common channels correspond to P demodulation reference signal ports, and each of the P common channels corresponds to one of these P demodulation reference signal ports. The P common channels correspond to the same information {c(0), c(1), ... c(E-1)}, and the P common channels correspond to at least two redundant versions of the same information. For example, P common channels correspond to Q redundant versions, where Q is a positive integer less than or equal to P, and Q is a positive integer greater than 1. If Q = 1, it is schemes A to C above, that is, schemes A to C are special cases of schemes D to F below, i.e., Q = 1. For example, the same common information {c(0), c(1), ... c(E-1)}, after channel coding, forms Q redundant versions, that is, it forms Q channel-coded bit sequences. The above r j Let j = 0, 1, ..., Q-1 be real numbers. Therefore, the P demodulation reference signals can be divided into Q groups, each group corresponding to one of the Q redundant versions. If a demodulation reference signal group contains only one demodulation reference signal, the channel-coded bit sequence corresponding to this demodulation reference signal group is scrambled and modulated to obtain a set of modulation symbols, which is transmitted on this single demodulation reference signal port. If a demodulation reference signal port group contains more than one demodulation reference signal, for example, if a demodulation reference signal port group j contains P... j There are demodulation reference signals, where P j If P is a positive integer greater than 1, then P in a demodulation reference signal group is... j Each demodulation reference signal corresponds to a redundant version sequence, which can be achieved using one of the above schemes A, B, and C. That is, for each demodulation reference port group, one of schemes A, B, and C can be used. For demodulation reference signal port group j, simply replace the P demodulation reference signals in schemes A, B, and C with P. jThere are Q demodulation reference signals. When all Q demodulation reference signal port groups, including more than one demodulation reference signal, adopt scheme A, it is called scheme D. Of course, different demodulation reference signal port groups can also adopt different schemes from schemes A, B, and C. For example, scheme A is used for demodulation reference signal port group 1, and scheme B is used for demodulation reference signal port group 2. When all Q demodulation reference signal port groups, including more than one demodulation reference signal, adopt scheme B, it is called scheme E. When all Q demodulation reference signal port groups, including more than one demodulation reference signal, adopt scheme C, it is called scheme F. Schemes D to F have the advantages of schemes A to C, respectively. However, since the P demodulation reference signal port groups adopt Q redundant versions, the redundancy versions corresponding to the modulation symbol sets in different DMRS port groups are different, so the performance may be different. For example, the channel decoding performance of redundancy version 0 is the best, and the channel decoding performance of redundancy version 1 is the second best. This means that when the terminal only receives data from one DMRS port group, the best performance cannot be obtained. However, if the terminal receives multiple demodulation reference signal port groups, the channel decoding performance is worse when the redundancy versions of these multiple demodulation reference signal port groups are all 0 than when the redundancy versions of these multiple demodulation reference signal port groups are different. Therefore, assigning different redundancy versions to different DMRS groups can improve channel coding gain. However, compared to schemes A to C, if the terminal can only receive one DMRS port group from these P DMRS ports and the corresponding redundancy version is not 0 (assuming redundancy version 0 is the redundancy version with the largest channel coding gain), its demodulation performance is worse than schemes A to C. However, if the terminal receives multiple demodulation reference signals from multiple demodulation reference signal ports belonging to multiple demodulation reference port groups from Q demodulation reference signal ports, the channel coding gain can be improved because there are more than one redundancy version corresponding to these multiple demodulation reference signal ports. Therefore, to obtain better performance, in one implementation, ports in a DMRS port group can be transmitted by APs with less overlap in the target receiving area, so that each terminal under the coverage of these multiple APs can receive at least the best redundancy version, for example, Figure 5As shown, three access points (APs) can cover an area, meaning each user in that area will receive a signal from any one of the three APs. The DMRS ports in different DMRS port groups are sent by APs with the most overlapping target coverage areas. This ensures that each terminal receives the best redundancy version 0, and terminals in overlapping areas of multiple APs can receive demodulation reference signal performance gains corresponding to different redundancy versions. Furthermore, the number of DMRS ports included in the DMRS port groups corresponding to different redundancy versions can be different. For example, redundancy version 0 includes the most demodulation reference signal ports. For example, when P demodulation references correspond to P synchronization signals, the synchronization signal sequences corresponding to the demodulation reference signals in the same demodulation reference signal port group satisfy predetermined characteristics, such as the corresponding physical cell ID (PCI) belonging to a predetermined set.

[0179] Option D: Q redundant versions + each redundant version adopts the method of Option A, P in the j-th DMRS port group j If there is a DMRS port, then the set of modulation symbols corresponding to this DMRS port group is {x}. j (0),x j (1),...,x j (N*P j -1)}, then the set of modulation symbols on each DMRS port in this DMRS port group is obtained according to the following formula eleven:

[0180]

[0181] Where s j,m (k) is the modulation symbol s(k) transmitted on the m-th DMRS port in the j-th DMRS port group, where m∈{0,1,...,P} j -1}.

[0182] It is evident that the main difference between Formula 11 and Formula 9 is that P is replaced by P. j The signal model of the data signals on the P demodulation reference ports is signal model 2, which can take advantage of signal model 2.

[0183] At this point, H can be considered as P, where one of the data modulation symbol sets is the set of data modulation symbols transmitted on a demodulation reference signal port, for example, s. j,m (k), for a j and m, s j,m (k) is a set of data modulation symbols, where different elements correspond to different k values.

[0184] Scheme E: Q redundant versions + each redundant version adopts the method of Scheme B. Specifically, when a demodulation reference signal port group includes more than one demodulation reference signal, this demodulation reference signal port group adopts the method of Scheme B. For example, the j-th demodulation reference signal group includes P... j Each demodulation reference signal corresponds to a redundant version sequence {a} j (0),a j (1),...,a j (N-1)}, this redundant version sequence is processed by P j A scrambling sequence {b j,m (0),b j,m (1),...,b j,m (N*q-1)},m=0,1...P j The scrambling of -1 forms P j A scrambled bit sequence {a j (0)+b j,m (0),a h (1)+b j,m (1),...,a j (N*q-1)+b j,m (N*q-1)}, P is formed through modulation j A set of modulation symbols {s j,m (0),s j,m (1),...,s j,m (N-1)}, this P j In the demodulation reference signal group P j Transmitted on the demodulation reference signal port, P j Each modulation symbol set in P is in the set of modulation symbols. j Transmission occurs on one of the demodulation reference signal ports in the demodulation reference signal port group, that is, the set of data modulation symbols corresponding to the m-th demodulation reference signal port in this demodulation reference signal port group is {s}. j,m (0),s j,m (1),...,s j,m (N*q-1)}. At this time, for a DMRS port group, the mapping from the channel-coded modulation symbol set to the demodulation reference signal port is not an independent mapping for each layer, but rather, within a DMRS group, layer mapping is performed first, followed by time-frequency resource mapping.

[0185] At this point, H can be considered as P, where one of the data modulation symbol sets is the set of data modulation symbols transmitted on a demodulation reference signal port, for example, s. j,m (k), for a j and m, s j,m (k) is a set of data modulation symbols, where different elements correspond to different k values.

[0186] Scheme F: Q redundant versions + each redundant version adopts the method of Scheme C, that is, when a demodulation reference signal port group includes more than one demodulation reference signal, Scheme C is adopted. For example, the redundant version sequence corresponding to the j-th demodulation reference signal port group is {a j (0),a j (1),...,a j (N*q-1)}, this redundant version sequence, after being scrambled by a scrambled sequence {b j (0),b j (1),...,b j Scrambling (N*q-1)} yields the scrambled bit sequence {a}. j (0)+b j (0),a j (1)+b j (1),...,a j (N*q-1)+b j After modulation, a set of modulation symbols {x} is obtained (N*q-1)}. j (0),x j (1),...,x j (N-1)}, this set of modulation symbols is P in this demodulation reference signal port group. j Transmitted on each demodulation reference signal port, as shown in Formula Twelve below:

[0187] s j,m (k)=x j (k) Formula Twelve.

[0188] At this point, H can be considered as M, where each demodulation reference signal group corresponds to a set of data modulation symbols, and each set of data modulation symbols is repeatedly transmitted on the port of each demodulation reference signal in its corresponding demodulation reference signal group.

[0189] In schemes A through F above, the modulation symbol sets of the P common channels corresponding to the P demodulation reference signals are transmitted on the same time-frequency resources, i.e., space-division transmission. The P demodulation reference signals can be transmitted on the same or different time-frequency resources; that is, the P demodulation reference signals can adopt one or more of signal models 2, 3, and 4. Preferably, the time-frequency resources occupied by the P demodulation reference signals and the time-frequency resources occupied by the corresponding data modulation symbol sets satisfy a predefined relationship. The data modulation symbol sets of the P common channels corresponding to the P demodulation reference signals can be the same modulation symbol set, as in schemes C and F, or different modulation symbol sets, as in schemes A, B, D, and E. In scheme F, the demodulation reference signals corresponding to different redundant versions correspond to different data modulation symbol sets.

[0190] Scheme G: A common channel includes a demodulation reference signal, a demodulation reference signal port and P synchronization signals satisfying a quasi-co-address relationship. For example, this demodulation reference signal is transmitted by P APs using signal model 1. This demodulation reference signal corresponds to a set of data modulation symbols for a common channel, and this set of data modulation symbols is also transmitted by P APs.

[0191] At this point, H can be considered as 1, where one set of data modulation symbols is transmitted on the port of this demodulation reference signal.

[0192] Scheme H: P common channels include P demodulation reference signals. These P common channels are transmitted on P sets of time-frequency resources. The modulation symbol set at each demodulation reference signal port in the P demodulation reference signals is obtained based on the same common information {c(0), c(1), ... c(E-1)}. The data modulation symbol sets at the P demodulation reference signal ports are different. For example, different demodulation reference signal ports may correspond to at least one of the following: redundant versions, scrambling sequences. In this case, H = P.

[0193] Scheme I: P common channels include P demodulation reference signals. These P common channels are transmitted on P sets of time-frequency resources. All demodulation reference signal ports in the P demodulation reference signals have the same set of modulation symbols, for example, they are all obtained based on the same common information {c(0), c(1), ... c(E-1)}. The modulation symbol sets on the P demodulation reference signal ports are also the same; for example, different demodulation reference signal ports in the P demodulation reference signals correspond to the same redundant version and the same scrambling sequence. In this case, =1, a set of data modulation symbols is repeatedly transmitted on each of the P demodulation reference signals.

[0194] Assuming the number of demodulation reference signal groups is A, and the number of redundant versions is A, then in schemes A to C above, A equals 1; in schemes D to F, A equals Q; in scheme H, A is less than or equal to P; in scheme I, A = 1; and in scheme G, A = 1.

[0195] The main features of schemes A through I are summarized below. Schemes A through I all involve having multiple APs repeatedly transmit the same common information {c(0),c(1),...c(E-1)}, or having P APs jointly transmit a single common information {c(0),c(1),...c(E-1)}. The main differences between the different schemes include at least one of the following: redundancy version, number of demodulation reference signal ports, mapping method from modulation symbols to resources, total number of time and frequency resources occupied, acquisition of scrambling sequence, and signal model. Table 2 shows the characteristics of each of schemes A through I:

[0196] Table 2 Scheme Features

[0197]

[0198]

[0199] Where N is the number of REs occupied by the data signal in the common channel, or it can be the total number of REs occupied by the demodulation reference signal and the data signal in the common channel. In the above schemes A to F, the time-frequency resources occupied by the P demodulation reference signals belong to one portion of the time-frequency resources of the common channel. Each portion of the time-frequency resources includes N REs. The demodulation reference signal and the data signal in the common channel can occupy different or the same time-frequency resources, preferably different. If they are the same, an AI receiver may need to be introduced.

[0200] Advantage 1 represents the advantage of signal model 1, and advantage 2 represents the advantage of signal model 2. Advantage 3 indicates that receiving any one or more demodulation reference signals from P demodulation reference signals can correctly decode the common channel. Advantage 4 indicates that multiple redundant versions of gain can be obtained; for example, when a terminal receives multiple DMRS groups, different redundant versions of performance gain can be obtained. Advantage 5 indicates that when the terminal receives only one of the P demodulation reference signals, the optimal redundant version of performance can be obtained. The processing in scheme A is simple because the multiple demodulation reference signal scheme for the common channel is the same as the multiple demodulation reference signal scheme for the dedicated channel, so the terminal does not need to use multiple processing steps to process the common channel and the dedicated channel separately. Advantage 6 represents the advantage of signal model 3, and advantage 7 represents the advantage of signal model 4. When scheme H / I is combined with any one of schemes A to G, the total number of time-frequency resources occupied can be changed to N*M, that is, occupying M portions of common channel time-frequency resources, where the M portions of common channel time-frequency resources can be located in different time domains and / or different frequency domains. For each common channel time-domain resource in the M common channel time-frequency resources, one or more of schemes A to G can be adopted. When one of schemes A to G is adopted for each of the M common channel time-frequency resources, each of the M common channel time-frequency resources has its corresponding Q demodulation reference signal port group. For example, the m-th time-frequency resource corresponds to Q... m There are three demodulated reference signal groups, m∈{1,2...M}, and for different m, their corresponding Q... m They can be the same or different. For the m-th time-frequency resource, the P demodulation reference signals in schemes A to F can be replaced with the P signals corresponding to the m-th time-frequency resource. m There are P demodulation reference signals. All demodulation reference signals in the M time-frequency resources constitute P demodulation reference signals, for example... Different demodulation reference signal groups in different time-frequency resource sets correspond to the same or different redundant versions. For M less than or equal to P, when M is less than P, at least two of the P common channels occupy the same time-frequency resource, and one or more of schemes A to F can be used. A common channel time-frequency resource can also be called a time-frequency resource set. Assuming the number of demodulation reference signal groups is A, and the number of redundant versions is A, then when each of the M time-frequency resource sets applies scheme A, A = M or A is less than or equal to M, depending on whether the redundant versions on different time-frequency resource sets in the M time-frequency resource sets are the same. If they are the same, A = 1; if they are different, A = M; if some are the same and some are different, it is less than M. Similarly, depending on whether different time-frequency resource sets in the M time-frequency resource sets correspond to the same redundant version, when any of schemes B to G is used for each time-frequency resource set in the M time-frequency resource sets, the case of A needs to be specifically analyzed. In short, A is a positive integer less than or equal to P, or A is a positive integer less than or equal to H.

[0201] In summary, schemes A through C can also be considered special cases of D through F, i.e., Q = 1. In the combined schemes A through F, Q is a positive integer greater than or equal to (Q = A). For each time-frequency resource, one or more schemes from A through I can be used. In schemes D through F, different demodulation reference signal groups correspond to the same or different scrambling sequences to generate parameters. Because different demodulation reference signal groups correspond to different redundant bits, the bit sequence 'a' is different. Having the same or different scrambling sequences can avoid the problem of deep fading.

[0202] A set of data modulation symbols corresponding to a demodulation reference signal is transmitted on the port corresponding to that demodulation reference signal. The channel estimation result obtained by the terminal based on this demodulation reference signal can be used for demodulation of the set of data modulation symbols on the port of this demodulation reference signal. For example, certain transmission parameters between the demodulation reference signal and its corresponding set of data modulation symbols meet predetermined conditions, such as having the same precoding at their transmitting ends, occupying no more than a predetermined value in time domain resources within a specified range (e.g., within a slot), and occupying no more than a specified range in frequency domain resources (e.g., within a PRB or several consecutive PRBs).

[0203] In the example above, P = 3, but this embodiment does not exclude other values ​​for P. Each of the P demodulation reference signals is transmitted by one AP, or each of the P demodulation reference signals can be transmitted by one or more APs. When a demodulation reference signal is transmitted by multiple APs, this is signal model 1, preferably when these multiple APs are co-located.

[0204] In the above description, the redundant version refers to the bit rate matching scheme before modulation after channel coding. For the same bit sequence before channel coding {c(0), c(1), ... c(E-1)}, different redundant versions can be used after channel coding to obtain different bit sequences before scrambling {a j (0),a j (1),...,a j (N*r-1)}, where j is the redundancy version number, is then scrambled and modulated to obtain the data modulation symbol set. For example, {c(0), c(1), ... c(E-1)}, after initial channel coding, yields an initial information bit sequence {d(0), d(1), ... d(F-1)}. Different redundancy versions represent different sets of bits extracted from this bit sequence, resulting in different bit sequences {a j (0),a j (1),...,a j (N*r-1)}.

[0205] When the physical resource block (PRB) containing the data signal of the common channel does not include a demodulation reference signal, and the synchronization signal is used as its demodulation reference signal, the aforementioned demodulation reference signal can also be replaced by the synchronization signal, or the demodulation reference signal can also be called the synchronization signal. For simplicity, the synchronization signal in this case can also be called the demodulation reference signal of the common channel.

[0206] In some embodiments, the transmission of the synchronization signal may employ one or more of the signal models 1 to 4 described above. For example, the synchronization signal may employ one or more of the following schemes (Scheme 1 to Scheme 4):

[0207] Scheme 1: Three APs transmit the same synchronization signal on the same time-frequency resources, that is, the same synchronization signal is transmitted by the three APs together. The receiving signal model of the receiver located at spatial position (x,y,z) is shown in Figure 1.

[0208] Scheme 2: Each of the three APs sends a synchronization signal, and the three synchronization signals of these three APs occupy the same time-frequency resources, but their corresponding sequences are different. The receiving signal model of the receiver located at spatial location (x,y,z) at time-frequency resource k is shown in Formula 2.

[0209] Option 3: Each of the three access points (APs) sends a synchronization signal, and the three synchronization signals of these three APs occupy at least one of the time-domain resources and / or frequency-domain resources differently. The receiver located at spatial location (x,y,z) has different time-frequency resources k. i The received signal model is 3, and the synchronization sequence sent by each AP is different.

[0210] Option 4: Similar to Option 3, the only difference is that different APs send the same synchronization signal sequence. Because different synchronization signals occupy different time-frequency resources, the synchronization signals can be distinguished by time-frequency resources even if the synchronization signal sequence is the same. Moreover, compared to Option 3, Option 4 can reduce the terminal search complexity, because the search complexity of the synchronization signal is equal to the number of synchronization signal sequences multiplied by the number of time-domain search points.

[0211] As one possible implementation, the P demodulation reference signals of the aforementioned common channel can each correspond to P synchronization signals. Each of the P demodulation reference signals obtains its parameters based on one of the P synchronization signals. These parameters include: a quasi-co-location reference signal, sequence parameters, the time-domain resources occupied by the demodulation reference signal, and the frequency-domain resources occupied by the demodulation reference signal. The P synchronization signals are transmitted by P APs respectively, or by multiple beams of a single AP. The P synchronization signals can be transmitted using one or more of the schemes 2 to 4 described above. The P synchronization signals can include synchronization signals with different sequences within a single synchronization signal block, or synchronization signals with corresponding synchronization signal sequences from different synchronization signal blocks. For example, the P synchronization signals may include at least two synchronization signals, where the physical cell indices corresponding to the different synchronization signals are different; or the P synchronization signals may include at least two synchronization signals, where the synchronization signal sequences corresponding to the different synchronization signals are different. Preferably, if multiple different synchronization signals correspond to the same synchronization signal sequence and multiple synchronization signal blocks, then the common channel corresponding to these multiple synchronization signals includes both the same common information and different common information. This allows the terminal to use the prior knowledge of different common information to distinguish between different synchronization signal blocks, thereby improving the accuracy of time positioning. However, if multiple synchronization signals correspond to the same synchronization signal block, then the common channel corresponding to these multiple synchronization signals can include only the same common information and not the different common information.

[0212] When the synchronization signal uses transmission scheme 1, the common channel can also use one or more of schemes A to I mentioned above. However, in this case, all P demodulation reference signals of the common channel correspond to one synchronization signal transmitted by the P APs in scheme 1, i.e., P demodulation reference signals correspond to one synchronization signal. Alternatively, the P demodulation signals of the common channel may not correspond to any synchronization signal, or some of the P demodulation signals of the common channel may correspond to one synchronization signal in scheme 1, while the other demodulation reference signals may not have corresponding synchronization signals, or they may have corresponding quasi-co-address reference signals of other types, such as phase tracking reference signals. One of the demodulation reference signals has a synchronization signal or a signal of other types that corresponds to it. This includes a demodulation reference signal whose parameters are obtained from a synchronization signal, wherein the parameters include at least one of the following: quasi-co-address reference signal, sequence parameters, time domain resources occupied by the demodulation reference signal, and frequency domain resources occupied by the demodulation reference signal.

[0213] When the quasi-co-address parameters of a demodulation reference signal are determined based on a synchronization signal, it means that the demodulation reference signal and the synchronization signal satisfy a quasi-co-address relationship with respect to one or more channel large-scale parameters.

[0214] When the scrambling sequences corresponding to the P common channels of the P demodulation reference signals are different (e.g., in schemes B, E, and H), each demodulation reference signal obtains its own corresponding scrambling sequence, which is used to scramble the data information bits corresponding to the demodulation reference signal. For example, each of the P demodulation reference signals obtains the scrambling sequence of the common channel data signal before modulation based on its corresponding synchronization signal, so that there are P scrambling sequences corresponding to the P synchronization signals. For example, if the P demodulation reference signals correspond to P physical cell indices, such as corresponding to P PCIs, the P scrambling sequences are obtained based on the P PCIs. If the P demodulation reference signals correspond to P synchronization signals, and the synchronization signal sequences of the P synchronization signals are the same, only the time-frequency resources are different, then P scrambling sequences are obtained based on the synchronization signal sequence index (also called the physical cell index) and the time-frequency index of the synchronization signal.

[0215] When multiple demodulation reference signals correspond to a single scrambling sequence (e.g., schemes A, C, D, F, G, I), and these multiple demodulation reference signals correspond to multiple synchronization signals, the scrambling sequence corresponding to the multiple synchronization signals becomes a single sequence. For example, if P synchronization signals correspond to P physical cell indices, such as P PCIs, this single scrambling sequence is determined according to... We obtain the scrambling sequence, where L is a positive integer, such as L = P or L is less than P. If the synchronization signal sequences of the P synchronization signals are the same, but the time and frequency resources are different, such as corresponding to one PCI and multiple synchronization signal blocks, then this scrambling sequence is obtained according to the PCI.

[0216] Furthermore, it is necessary to determine how the P demodulation reference signals are multiplexed. In summary, any one or more of signal models 2-4 can be used. The P demodulation reference signals correspond to at least one of the following, obtained from the parameters of the synchronization signal: time-domain resources, frequency-domain resources, and code-domain resources. Specifically, if these P demodulation reference signals include multiple demodulation reference signals using code division multiplexing, then the multiple demodulation reference signals correspond to a common master sequence and multiple OCC codes. In the case where multiple demodulation reference signals correspond to multiple synchronization signal sequences, the multiple synchronization signal sequences correspond to a master sequence of a demodulation reference signal. The scheme for obtaining this common master sequence can be similar to the method described above, where multiple demodulation reference signals correspond to a scrambling sequence. The demodulation reference signal is the product of the target sequence and the OCC code.

[0217] In the above description, the scrambling sequence includes the scrambling sequence after channel coding and before modulation, and it can also include the scrambling sequence applied to the CRC checksum during channel coding. Each scrambling sequence corresponds to a scrambling sequence generation parameter. Different scrambling sequence generation parameters can generate different scrambling sequences. For example, if the sequence is a random sequence, the random sequence is determined by the initialization parameters, and the scrambling sequence generation parameters are the initialization parameters of the random sequence.

[0218] When a terminal receives common channels, knowing which common channels' demodulation reference signals correspond to the same common information (i.e., knowing the aforementioned P demodulation reference signals) will improve the terminal's performance in detecting common information. To this end, at least one of the following methods can be used to obtain the P demodulation reference signals: signaling information notified by the base station; predetermined rules (e.g., P demodulation reference signals can be obtained based on the parameters of any one of the P demodulation reference signals, or the base station and terminal pre-agree on multiple demodulation reference signal sets, with demodulation reference signals belonging to one set constituting P demodulation reference signals, including the aforementioned A demodulation reference signal groups); or obtaining the P demodulation reference signals based on the parameters of the synchronization signals corresponding to the P demodulation reference signals (e.g., the base station and terminal agree on multiple synchronization signal sets, with demodulation reference signals corresponding to one set constituting P demodulation reference signals).

[0219] In the above description, each synchronization signal corresponds to a combination of time-domain, frequency-domain, code-domain, and spatial-domain resources. Different synchronization signals correspond to at least one of the time-domain, frequency-domain, code-domain, and spatial-domain resources differently. The spatial-domain resources correspond to a set of quasi-co-address parameters, and signals corresponding to the same spatial-domain resources satisfy a quasi-co-address relationship with respect to the quasi-co-address parameters. The quasi-co-address parameters (also known as channel large-scale parameters) include at least one of the following: Doppler shift, Doppler spread, average delay, delay spread, and average gain.

[0220] Furthermore, in embodiments of this disclosure, transmission includes at least one of the following: sending or receiving. When used by a sender, it is sending; when used by a receiver, it is receiving; and in a system that uses both sending and receiving, it is sending by the sender and receiving by the receiver.

[0221] This disclosure mainly considers the following four factors: the time-frequency resource load occupied by the common channel, the deep attenuation of the data space of the common channel, the interference of the common channel, and the detection complexity of the terminal. It provides a variety of common channel transmission schemes. In practical applications, depending on which of the above four factors is more important, a suitable transmission scheme is selected from the above common channel transmission schemes to solve the transmission of the common channel under the distributed communication model.

[0222] This disclosure also provides a communication method applied to a second communication node, such as... Figure 6 As shown, the communication method may include:

[0223] S601, Transmit P demodulation reference signals for the common channel.

[0224] Wherein, P demodulation reference signals correspond to H sets of data modulation symbols, and H sets of data modulation symbols correspond to the same common information, where P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P.

[0225] In this embodiment of the disclosure, each of the P demodulation reference signals corresponds to one of the H data modulation symbol sets, and each of the H data modulation symbol sets corresponds to at least one demodulation reference signal among the P demodulation reference signals. Each data symbol set is transmitted on the port corresponding to each demodulation reference signal among its at least one demodulation reference signal.

[0226] It should be noted that the descriptions of the P demodulation reference signals and the H data modulation symbol sets can be found in the above embodiments, and will not be repeated here.

[0227] In some embodiments, the P demodulation reference signals can satisfy at least one of the following:

[0228] Each of the P demodulation reference signals corresponds one-to-one with the P synchronization signals.

[0229] P demodulation reference signals correspond to one synchronization signal;

[0230] Of the P demodulation reference signals, some of the demodulation reference signals correspond to the synchronization signal, and the other demodulation reference signals correspond to the tracking reference signal.

[0231] The P demodulation reference signals include at least one first demodulation reference signal, and one of the first demodulation reference signals corresponds to at least two synchronization signals.

[0232] The communication method provided in this disclosure may further include at least one of the following:

[0233] P synchronization signals are determined according to the first predetermined rule;

[0234] According to the second predetermined rule, at least two synchronization signals are determined corresponding to a first demodulation reference signal;

[0235] A first demodulation reference signal corresponding to at least two synchronization signals is determined according to the third predetermined rule;

[0236] Send first signaling information, wherein the first signaling information includes at least one of the following: P synchronization signals, at least two synchronization signals corresponding to a first demodulation reference signal, and a first demodulation reference signal corresponding to at least two synchronization signals;

[0237] Based on the parameters of the synchronization signals, at least one of the following is determined: P synchronization signals, at least two synchronization signals corresponding to a first demodulation reference signal, and a first demodulation reference signal corresponding to at least two synchronization signals.

[0238] Similarly, the P demodulation reference signals are determined based on at least one of the following:

[0239] Reservation rules;

[0240] Signaling information;

[0241] Parameters of the synchronization signal;

[0242] Parameters of the demodulation reference signal.

[0243] In other words, the communication method provided in this disclosure embodiment may further include at least one of the following:

[0244] P demodulation reference signals are determined according to predetermined rules (such as the fourth predetermined rule);

[0245] Send a second signaling message, which includes relevant information for P demodulation reference signals;

[0246] P demodulation reference signals are determined based on the parameters of the synchronization signal;

[0247] P demodulation reference signals are determined based on the parameters of the demodulation reference signals.

[0248] The following describes the communication method provided in the above embodiment using the interaction between the first communication node and the second communication node as an example. Figure 7 As shown, it includes:

[0249] S701, The second communication node sends P demodulation reference signals of the common channel to the first communication node.

[0250] S702, The first communication node receives at least one demodulation reference signal from among the P demodulation reference signals of the common channel.

[0251] S703. The first communication node detects the set of data modulation symbols corresponding to at least one demodulation reference signal based on the received demodulation reference signal to obtain common information.

[0252] It is understood that, in order to achieve the above-mentioned functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the algorithmic steps of the examples described in conjunction with the embodiments of this disclosure, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art 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 disclosure.

[0253] This disclosure embodiment can divide the communication device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosure embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each functional module according to each function.

[0254] Figure 8 This is a schematic diagram of the structure of a communication device provided in an embodiment of this disclosure. Figure 1 The communication device can be applied to the first communication node and perform the above-mentioned functions. Figure 4 The communication method shown, and Figure 7 An example from the first node side. (e.g.) Figure 8 As shown, the communication device 800 includes a receiving module 801 and a processing module 802.

[0255] The receiving module 801 is used to receive at least one demodulation reference signal from P demodulation reference signals of a common channel. The P demodulation reference signals correspond to H sets of data modulation symbols, and the H sets of data modulation symbols correspond to the same common information. P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P. The processing module 802 is used to detect the set of data modulation symbols corresponding to the at least one demodulation reference signal based on the received at least one demodulation reference signal to obtain the common information.

[0256] In some embodiments, each of the P demodulation reference signals corresponds to one of the H data modulation symbol sets, and each of the H data modulation symbol sets corresponds to at least one demodulation reference signal among the P demodulation reference signals. Each data symbol set is transmitted on the port corresponding to each demodulation reference signal among its at least one demodulation reference signal.

[0257] In some embodiments, the H sets of data modulation symbols correspond to A different redundant versions, where A is a positive integer less than or equal to H, and the A different redundant versions are A different redundant versions of the same public information in channel coding, where A is a positive integer less than or equal to P.

[0258] In some embodiments, the P demodulation reference signals include A demodulation reference signal groups, and the A demodulation reference signal groups correspond one-to-one with A redundant versions.

[0259] In some embodiments, A demodulation reference signal groups satisfy any one of the following:

[0260] The generation parameters of A demodulated reference signal groups and A scrambling sequences correspond one-to-one;

[0261] Each of the A demodulation reference signal groups corresponds to one or more scrambling sequence generation parameters. When A is greater than 1, different demodulation reference signal groups in the A demodulation reference signal groups correspond to different or the same scrambling sequence generation parameters.

[0262] A demodulation reference signal group corresponds to the generation parameters of a scrambling sequence.

[0263] In some embodiments, at least two of the H data modulation symbol sets have scrambling sequences that are determined based on the same generation parameter.

[0264] In some embodiments, the scrambling sequence corresponding to at least two of the H data modulation symbol sets is determined based on different generation parameters.

[0265] In some embodiments, the set of H data modulation symbols satisfies any one of the following:

[0266] The H data modulation symbol set is obtained by dividing a first modulation symbol set into H subsets, where the first modulation symbol set is determined based on common information and the generation parameters of a scrambling sequence;

[0267] Each of the H sets of data modulation symbols is obtained separately based on common information, wherein any two sets of data modulation symbols in the H sets of data modulation symbols are different;

[0268] H equals 1, and each of the P demodulation reference signals corresponds to the same set of data modulation symbols.

[0269] In some embodiments, the j-th demodulation reference signal group in A demodulation reference signal groups includes P j P is a demodulation reference signal and H data modulation symbol sets. j P corresponding to each demodulated reference signal j The data modulation symbol sets are respectively in P j Received on the port corresponding to each demodulation reference signal, and P j A set of data modulation symbols is formed by dividing a first set of modulation symbols into P. j A subset is obtained;

[0270] Here, a first modulation symbol set is obtained based on common information, the generation parameters of a scrambling sequence, and a redundant version. A redundant version is a redundant version corresponding to the j-th demodulated reference signal group among A redundant versions, P j Let J be a positive integer less than or equal to P, where j ∈ {1....A}, and P j It is a positive integer less than or equal to P.

[0271] In some embodiments, the j-th demodulation reference signal group in A demodulation reference signal groups includes P j P is a demodulation reference signal and H data modulation symbol sets. j P corresponding to each demodulated reference signal j The data modulation symbol sets are respectively in P j Received on the port corresponding to the demodulation reference signal;

[0272] Among them, P j The set of modulation symbols is formed by processing the first bit sequence through P... jThe first bit sequence is obtained by scrambling and then modulating a scrambled sequence. It is derived from common information and a redundant version corresponding to the j-th demodulated reference signal group from A redundant versions. j A positive integer less than or equal to P, where P j Each scrambling sequence corresponds to P j The generation parameters of the scrambling sequence, j∈{1....A}, P j It is a positive integer less than or equal to P.

[0273] In some embodiments, the j-th demodulation reference signal group in A demodulation reference signal groups includes P j P is a demodulation reference signal and H data modulation symbol sets. j A set of data modulation symbols corresponding to a demodulation reference signal is in P. j Received on each port corresponding to the demodulation reference signal;

[0274] In this set of data modulation symbols, a first bit sequence is obtained by scrambling it with a scrambling sequence and then modulating it. The first bit sequence is obtained based on common information and a redundant version corresponding to the j-th demodulation reference signal group in A redundant versions. j Let J be a positive integer less than or equal to P, where j ∈ {1....A}, and P j It is a positive integer less than or equal to P.

[0275] In some embodiments, the set of H data modulation symbols occupies a time-frequency resource set. In a time-frequency resource set, H data modulation symbols are received on P demodulation reference signal ports on each time-frequency resource. The P demodulation reference signals and P demodulation reference signal ports correspond one-to-one. One modulation symbol among the H data modulation symbols is received on each of the P demodulation reference signal ports. Each of the H data modulation symbols is received on one or more demodulation reference signal ports among the P demodulation reference signal ports. The H data modulation symbols belong to the set of H data modulation symbols respectively.

[0276] In some embodiments, H sets of data modulation symbols occupy M sets of time-frequency resources, where M is a positive integer less than or equal to P and greater than 1, and at least one set of data modulation symbols from the H sets of data modulation symbols is received on the time-frequency resource set of each of the M sets of time-frequency resources.

[0277] In some embodiments, A demodulation reference signal groups correspond to one time-frequency resource set; or, A demodulation reference signal groups correspond to M time-frequency resource sets, where M is a positive integer less than or equal to P and greater than 1.

[0278] In some embodiments, where A demodulation reference signal groups correspond to M time-frequency resource sets, the m-th time-frequency resource set among the M time resource sets corresponds to A in the A demodulation reference signal groups. m A demodulation reference signal group, of which A m Less than A, m∈{1,2,...,M}.

[0279] In some embodiments, the P demodulation reference signals satisfy at least one of the following:

[0280] Each of the P demodulation reference signals corresponds one-to-one with the P synchronization signals.

[0281] P demodulation reference signals correspond to one synchronization signal;

[0282] Of the P demodulation reference signals, some of the demodulation reference signals correspond to the synchronization signal, and the other demodulation reference signals correspond to the tracking reference signal.

[0283] The P demodulation reference signals include at least one first demodulation reference signal, and one of the first demodulation reference signals corresponds to at least two synchronization signals.

[0284] In some embodiments, the communication method provided in this disclosure further includes at least one of the following:

[0285] P synchronization signals are determined according to the first predetermined rule;

[0286] According to the second predetermined rule, at least two synchronization signals are determined corresponding to a first demodulation reference signal;

[0287] A first demodulation reference signal corresponding to at least two synchronization signals is determined according to the third predetermined rule;

[0288] Receive first signaling information, wherein the first signaling information includes at least one of the following: P synchronization signals, at least two synchronization signals corresponding to a first demodulation reference signal, and a first demodulation reference signal corresponding to at least two synchronization signals;

[0289] Based on the parameters of the synchronization signals, at least one of the following is determined: P synchronization signals, at least two synchronization signals corresponding to a first demodulation reference signal, and a first demodulation reference signal corresponding to at least two synchronization signals.

[0290] In some embodiments, the parameters of one of the P demodulation reference signals are obtained based on the synchronization signal corresponding to that demodulation reference signal; the parameters include at least one of the following:

[0291] Quasi-co-located reference signal;

[0292] Sequence parameters of a demodulated reference signal;

[0293] The time-domain resources occupied by a demodulation reference signal;

[0294] The frequency domain resources occupied by a demodulation reference signal;

[0295] The code domain resources occupied by a demodulation reference signal;

[0296] Large-scale channel parameters of a demodulated reference signal.

[0297] In some embodiments, when multiple demodulation reference signals in P demodulation reference signals correspond to multiple synchronization signals and multiple demodulation reference signals correspond to the generation parameters of a scrambling sequence, the parameters of the multiple synchronization signals all correspond to the generation parameters of a scrambling sequence.

[0298] In some embodiments, at least one of the following conditions is met:

[0299] The P synchronization signals include at least two synchronization signals, and the physical cell indices corresponding to the different synchronization signals among the at least two synchronization signals are different.

[0300] The P synchronization signals include at least two synchronization signals, and the synchronization signal sequences corresponding to the different synchronization signals among the at least two synchronization signals are different.

[0301] When at least two of the P synchronization signals correspond to the same synchronization signal sequence and different synchronization signal blocks, the different modulation symbol sets in the H data modulation symbol sets corresponding to the at least two synchronization signals also include different common information.

[0302] When at least two of the P synchronization signals correspond to different synchronization signal sequences, the different data modulation symbol sets in the H data modulation symbol sets corresponding to the at least two synchronization signals only include the same common information and do not include different common information.

[0303] In some embodiments, the resource multiplexing method of the P demodulation reference signals includes at least one of the following: time division multiplexing, frequency division multiplexing, and code division multiplexing.

[0304] In some embodiments, when the resource multiplexing method of the P demodulation reference signals includes code division multiplexing, at least two of the P demodulation reference signals are multiplexed using code division multiplexing, and at least two demodulation reference signals satisfy at least one of the following:

[0305] At least two demodulation reference signals correspond to the same master sequence, which is determined based on the parameters of one or more synchronization signals among the plurality of synchronization signals corresponding to the at least two demodulation reference signals.

[0306] At least two demodulation reference signals correspond one-to-one with at least two orthogonal covering codes;

[0307] Each of the at least two demodulation reference signals is determined by the product of the orthogonal covering code corresponding to each demodulation reference signal and the parent sequence.

[0308] In some embodiments, the P demodulation reference signals are determined based on at least one of the following:

[0309] Reservation rules;

[0310] Signaling information;

[0311] Parameters of the synchronization signal;

[0312] Parameters of the demodulation reference signal.

[0313] In some embodiments, at least one of the following conditions is met:

[0314] The same public information consists of the information bits before channel coding corresponding to the public channel;

[0315] Different sets of data modulation symbols in H sets of data modulation symbols include only the same common information, and do not include different common information.

[0316] Figure 9 This is a schematic diagram of the structure of a communication device provided in an embodiment of this disclosure. Figure 2 The communication device can be applied to the second communication node and perform the above-mentioned functions. Figure 6 The communication method shown, and Figure 7 An example of an implementation on the second communication node side. For example... Figure 9 As shown, the communication device 900 includes: a transmitting module 901.

[0317] The transmitting module 901 is used to transmit P demodulation reference signals of the common channel. The P demodulation reference signals correspond to H sets of data modulation symbols. The H sets of data modulation symbols correspond to the same common information. P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P.

[0318] In some embodiments, each of the P demodulation reference signals corresponds to one of the H data modulation symbol sets, and each of the H data modulation symbol sets corresponds to at least one demodulation reference signal among the P demodulation reference signals. Each data symbol set is transmitted on the port corresponding to each demodulation reference signal among its at least one demodulation reference signal.

[0319] In some embodiments, the H sets of data modulation symbols correspond to A different redundant versions, where A is a positive integer less than or equal to H, and the A different redundant versions are A different redundant versions of the same public information in channel coding, where A is a positive integer less than or equal to P.

[0320] In some embodiments, the P demodulation reference signals include A demodulation reference signal groups, and the A demodulation reference signal groups correspond one-to-one with A redundant versions.

[0321] In some embodiments, A demodulation reference signal groups satisfy any one of the following:

[0322] The generation parameters of A demodulated reference signal groups and A scrambling sequences correspond one-to-one;

[0323] Each of the A demodulation reference signal groups corresponds to one or more scrambling sequence generation parameters. When A is greater than 1, different demodulation reference signal groups in the A demodulation reference signal groups correspond to different or the same scrambling sequence generation parameters.

[0324] A demodulation reference signal group corresponds to the generation parameters of a scrambling sequence.

[0325] In some embodiments, at least two of the H data modulation symbol sets have scrambling sequences that are determined based on the same generation parameter.

[0326] In some embodiments, the scrambling sequence corresponding to at least two of the H data modulation symbol sets is determined based on different generation parameters.

[0327] In some embodiments, the set of H data modulation symbols satisfies any one of the following:

[0328] The H data modulation symbol set is obtained by dividing a first modulation symbol set into H subsets, where the first modulation symbol set is determined based on common information and the generation parameters of a scrambling sequence;

[0329] Each of the H sets of data modulation symbols is obtained separately based on common information, wherein any two sets of data modulation symbols in the H sets of data modulation symbols are different;

[0330] H equals 1, and each of the P demodulation reference signals corresponds to the same set of data modulation symbols.

[0331] In some embodiments, the j-th demodulation reference signal group in A demodulation reference signal groups includes P j P is a demodulation reference signal and H data modulation symbol sets. jP corresponding to each demodulated reference signal j The data modulation symbol sets are respectively in P j Transmitted on the port corresponding to each demodulation reference signal, and P j A set of data modulation symbols is formed by dividing a first set of modulation symbols into P. j A subset is obtained;

[0332] Here, a first modulation symbol set is obtained based on common information, the generation parameters of a scrambling sequence, and a redundant version. A redundant version is a redundant version corresponding to the j-th demodulated reference signal group among A redundant versions, P j Let J be a positive integer less than or equal to P, where j ∈ {1....A}, and P j It is a positive integer less than or equal to P.

[0333] In some embodiments, the j-th demodulation reference signal group in A demodulation reference signal groups includes P j P is a demodulation reference signal and H data modulation symbol sets. j P corresponding to each demodulated reference signal j The data modulation symbol sets are respectively in P j Transmitted on the port corresponding to each demodulation reference signal;

[0334] Among them, P j The set of modulation symbols is formed by processing the first bit sequence through P... j The first bit sequence is obtained by scrambling and then modulating a scrambled sequence. It is derived from common information and a redundant version corresponding to the j-th demodulated reference signal group from A redundant versions. j A positive integer less than or equal to P, where P j Each scrambling sequence corresponds to P j The generation parameters of the scrambling sequence, j∈{1....A}, P j It is a positive integer less than or equal to P.

[0335] In some embodiments, the j-th demodulation reference signal group in A demodulation reference signal groups includes P j P is a demodulation reference signal and H data modulation symbol sets. j A set of data modulation symbols corresponding to a demodulation reference signal is in P. j Transmitted on each port corresponding to the demodulation reference signal;

[0336] In this set of data modulation symbols, a first bit sequence is obtained by scrambling it with a scrambling sequence and then modulating it. The first bit sequence is obtained based on common information and a redundant version corresponding to the j-th demodulation reference signal group in A redundant versions. jLet J be a positive integer less than or equal to P, where j ∈ {1....A}, and P j It is a positive integer less than or equal to P.

[0337] In some embodiments, the set of H data modulation symbols occupies a time-frequency resource set. In a time-frequency resource set, H data modulation symbols are transmitted on P demodulation reference signal ports on each time-frequency resource. The P demodulation reference signals and P demodulation reference signal ports correspond one-to-one. One modulation symbol of the H data modulation symbols is transmitted on each of the P demodulation reference signal ports. Each of the H data modulation symbols is transmitted on one or more of the P demodulation reference signal ports. The H data modulation symbols belong to the set of H data modulation symbols respectively.

[0338] In some embodiments, H sets of data modulation symbols occupy M sets of time-frequency resources, where M is a positive integer less than or equal to P and greater than 1. At least one set of data modulation symbols from the H sets of data modulation symbols is transmitted on the time-frequency resource set of each of the M sets of time-frequency resources.

[0339] In some embodiments, A demodulation reference signal groups correspond to one time-frequency resource set; or, A demodulation reference signal groups correspond to M time-frequency resource sets, where M is a positive integer less than or equal to P and greater than 1.

[0340] In some embodiments, where A demodulation reference signal groups correspond to M time-frequency resource sets, the m-th time-frequency resource set among the M time resource sets corresponds to A in the A demodulation reference signal groups. m A demodulation reference signal group, of which A m Less than A, m∈{1,2,...,M}.

[0341] In some embodiments, the P demodulation reference signals satisfy at least one of the following:

[0342] Each of the P demodulation reference signals corresponds one-to-one with the P synchronization signals.

[0343] P demodulation reference signals correspond to one synchronization signal;

[0344] Of the P demodulation reference signals, some of the demodulation reference signals correspond to the synchronization signal, and the other demodulation reference signals correspond to the tracking reference signal.

[0345] The P demodulation reference signals include at least one first demodulation reference signal, and one of the first demodulation reference signals corresponds to at least two synchronization signals.

[0346] In some embodiments, the communication method provided in this disclosure further includes at least one of the following:

[0347] P synchronization signals are determined according to the first predetermined rule;

[0348] According to the second predetermined rule, at least two synchronization signals are determined corresponding to a first demodulation reference signal;

[0349] A first demodulation reference signal corresponding to at least two synchronization signals is determined according to the third predetermined rule;

[0350] Receive first signaling information, wherein the first signaling information includes at least one of the following: P synchronization signals, at least two synchronization signals corresponding to a first demodulation reference signal, and a first demodulation reference signal corresponding to at least two synchronization signals;

[0351] Based on the parameters of the synchronization signals, at least one of the following is determined: P synchronization signals, at least two synchronization signals corresponding to a first demodulation reference signal, and a first demodulation reference signal corresponding to at least two synchronization signals.

[0352] In some embodiments, the parameters of one of the P demodulation reference signals are obtained based on the synchronization signal corresponding to that demodulation reference signal; the parameters include at least one of the following:

[0353] Quasi-co-located reference signal;

[0354] Sequence parameters of a demodulated reference signal;

[0355] The time-domain resources occupied by a demodulation reference signal;

[0356] The frequency domain resources occupied by a demodulation reference signal;

[0357] The code domain resources occupied by a demodulation reference signal;

[0358] Large-scale channel parameters of a demodulated reference signal.

[0359] In some embodiments, when multiple demodulation reference signals in P demodulation reference signals correspond to multiple synchronization signals and multiple demodulation reference signals correspond to the generation parameters of a scrambling sequence, the parameters of the multiple synchronization signals all correspond to the generation parameters of a scrambling sequence.

[0360] In some embodiments, at least one of the following conditions is met:

[0361] The P synchronization signals include at least two synchronization signals, and the physical cell indices corresponding to the different synchronization signals among the at least two synchronization signals are different.

[0362] The P synchronization signals include at least two synchronization signals, and the synchronization signal sequences corresponding to the different synchronization signals among the at least two synchronization signals are different.

[0363] When at least two of the P synchronization signals correspond to the same synchronization signal sequence and different synchronization signal blocks, the different modulation symbol sets in the H data modulation symbol sets corresponding to the at least two synchronization signals also include different common information.

[0364] When at least two of the P synchronization signals correspond to different synchronization signal sequences, the different data modulation symbol sets in the H data modulation symbol sets corresponding to the at least two synchronization signals only include the same common information and do not include different common information.

[0365] In some embodiments, the resource multiplexing method of the P demodulation reference signals includes at least one of the following: time division multiplexing, frequency division multiplexing, and code division multiplexing.

[0366] In some embodiments, when the resource multiplexing method of the P demodulation reference signals includes code division multiplexing, at least two of the P demodulation reference signals are multiplexed using code division multiplexing, and at least two demodulation reference signals satisfy at least one of the following:

[0367] At least two demodulation reference signals correspond to the same master sequence, which is determined based on the parameters of one or more synchronization signals among the plurality of synchronization signals corresponding to the at least two demodulation reference signals.

[0368] At least two demodulation reference signals correspond one-to-one with at least two orthogonal covering codes;

[0369] Each of the at least two demodulation reference signals is determined by the product of the orthogonal covering code corresponding to each demodulation reference signal and the parent sequence.

[0370] In some embodiments, the communication method provided in this disclosure further includes at least one of the following:

[0371] P demodulation reference signals are determined according to predetermined rules;

[0372] Send a second signaling message, which includes relevant information for P demodulation reference signals;

[0373] P demodulation reference signals are determined based on the parameters of the synchronization signal;

[0374] P demodulation reference signals are determined based on the parameters of the demodulation reference signals.

[0375] In some embodiments, at least one of the following conditions is met:

[0376] The same public information consists of the information bits before channel coding corresponding to the public channel;

[0377] Different sets of data modulation symbols in H sets of data modulation symbols include only the same common information, and do not include different common information.

[0378] In other words, in this embodiment, the demodulation reference signals of P common channels correspond to H sets of data modulation symbols, where the H sets of data modulation symbols correspond to the same common information. When P is greater than 1, the sets of data modulation symbols corresponding to the demodulation reference signals of multiple common channels are associated. The same common information is jointly transmitted or repeatedly transmitted through the demodulation signals of multiple common channels to improve the reception performance of the common channels, avoid spatial deep fading of the common channels, and comprehensively consider the load, interference, and terminal complexity of the common channels. Various common channel transmission schemes that can be adopted to avoid different factors mentioned above are given. In practical applications, the transmission scheme of the common channels needs to consider factors such as spatial deep fading, cell handover rate and number of times, interference and load of the common channels, and detection complexity of the terminal. The appropriate transmission scheme is selected according to the main influencing factors mentioned above.

[0379] In implementing the functions of the integrated modules described above using hardware, this disclosure provides another possible structural illustration of the communication device involved in the above embodiments. Figure 3 .like Figure 10 As shown, the communication device 1000 includes: a processor 1002 and a bus 1004. Optionally, the communication device 1000 may also include a memory 1001; optionally, the communication device may also include a communication interface 1003.

[0380] Processor 1002 may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1002 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1002 may also be a combination of functions implementing computation, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0381] Communication interface 1003 is used to connect with other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0382] The memory 1001 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0383] In one possible implementation, the memory 1001 can exist independently of the processor 1002. The memory 1001 can be connected to the processor 1002 via a bus 1004 and is used to store instructions or program code. When the processor 1002 calls and executes the instructions or program code stored in the memory 1001, it can implement the communication method provided in the embodiments of this disclosure.

[0384] In another possible implementation, the memory 1001 can also be integrated with the processor 1002.

[0385] Bus 1004 can be an extended industry standard architecture (EISA) bus, etc. Bus 1004 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 10 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0386] Some embodiments of this disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform the communication method as described in any of the above embodiments.

[0387] Exemplary examples of computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0388] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the communication method described in any of the above embodiments.

[0389] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, Applied to a first communication node, the method includes: At least one demodulation reference signal is received from P demodulation reference signals of a common channel. The P demodulation reference signals correspond to H sets of data modulation symbols. The H sets of data modulation symbols correspond to the same common information. P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P. Based on the received at least one demodulation reference signal, the set of data modulation symbols corresponding to the at least one demodulation reference signal is detected to obtain the common information.

2. The method according to claim 1, characterized in that, Each of the P demodulation reference signals corresponds to one of the H data modulation symbol sets, and each of the H data modulation symbol sets corresponds to at least one of the P demodulation reference signals. Each data symbol set is transmitted on a port corresponding to each of the at least one demodulation reference signals.

3. The method according to claim 1, characterized in that, The H sets of data modulation symbols correspond to A different redundant versions, where A is a positive integer less than or equal to H. The A different redundant versions are A different redundant versions of the same public information in channel coding, where A is a positive integer less than or equal to P.

4. The method according to claim 3, characterized in that, The P demodulation reference signals include A demodulation reference signal groups, and the A demodulation reference signal groups correspond one-to-one with the A redundant versions.

5. The method according to claim 4, characterized in that, The A demodulation reference signal groups satisfy any one of the following: The generation parameters of the A demodulation reference signal groups and the A scrambling sequences correspond one-to-one; Each of the A demodulation reference signal groups corresponds to one or more scrambling sequence generation parameters. When A is greater than 1, different demodulation reference signal groups in the A demodulation reference signal groups correspond to different or the same scrambling sequence generation parameters. The A demodulation reference signal groups correspond to the generation parameters of a scrambling sequence.

6. The method according to claim 1, characterized in that, Among the H sets of data modulation symbols, at least two sets of data modulation symbols have scrambling sequences that are determined based on the same generation parameter.

7. The method according to claim 1, characterized in that, Among the H sets of data modulation symbols, at least two sets of data modulation symbols have scrambling sequences that are determined based on different generation parameters.

8. The method according to claim 1, characterized in that, The set of H data modulation symbols satisfies any one of the following: The H sets of data modulation symbols are obtained by dividing a first set of modulation symbols into H subsets, wherein the first set of modulation symbols is determined based on the common information and the generation parameters of a scrambling sequence; Each of the H sets of data modulation symbols is obtained based on the common information, wherein any two sets of data modulation symbols in the H sets of data modulation symbols are different. H equals 1, and each of the P demodulation reference signals corresponds to the same set of data modulation symbols.

9. The method according to claim 4, characterized in that, The j-th demodulation reference signal group among the A demodulation reference signal groups includes P. j The demodulation reference signal, P in the set of H data modulation symbols j P corresponding to each demodulated reference signal j Each set of data modulation symbols is respectively in P j Received on the port corresponding to each demodulation reference signal, and the P j A set of data modulation symbols is formed by dividing a first set of modulation symbols into P. j A subset is obtained; The first modulation symbol set is obtained based on the common information, the generation parameters of a scrambling sequence, and a redundant version. The redundant version is a redundant version corresponding to the j-th demodulation reference signal group among the A redundant versions. j Let J be a positive integer less than or equal to P, where j ∈ {1....A}, and P j It is a positive integer less than or equal to P.

10. The method according to claim 4, characterized in that, The j-th demodulation reference signal group among the A demodulation reference signal groups includes P. j The demodulation reference signal, P in the set of H data modulation symbols j P corresponding to each demodulated reference signal j Each set of data modulation symbols is respectively in P j Received on the port corresponding to the demodulation reference signal; Wherein, P j The set of modulation symbols is formed by processing the first bit sequence through P... j The first bit sequence is obtained by scrambling and then modulating a scrambled sequence. The first bit sequence is obtained based on the common information and a redundant version corresponding to the j-th demodulation reference signal group from the A redundant versions. j A positive integer less than or equal to P, where P j Each scrambling sequence corresponds to P j The generation parameters of the scrambling sequence, j∈{1....A}, P j It is a positive integer less than or equal to P.

11. The method according to claim 4, characterized in that, The j-th demodulation reference signal group among the A demodulation reference signal groups includes P. j The demodulation reference signal, P in the set of H data modulation symbols j A set of data modulation symbols corresponding to each demodulation reference signal is described in P. j Received on each port corresponding to the demodulation reference signal; The data modulation symbol set is obtained by scrambling a first bit sequence with a scrambling sequence and then modulating it. The first bit sequence is obtained based on the common information and a redundant version corresponding to the j-th demodulation reference signal group in the A redundant versions. j Let J be a positive integer less than or equal to P, where j ∈ {1....A}, and P j It is a positive integer less than or equal to P.

12. The method according to any one of claims 1 to 11, characterized in that, The set of H data modulation symbols occupies a time-frequency resource set. H data modulation symbols are received on P demodulation reference signal ports on each time-frequency resource in the time-frequency resource set. The P demodulation reference signals and the P demodulation reference signal ports correspond one-to-one. One modulation symbol of the H data modulation symbols is received on each of the P demodulation reference signal ports. Each of the H data modulation symbols is received on one or more of the P demodulation reference signal ports. The H data modulation symbols belong to the set of H data modulation symbols.

13. The method according to any one of claims 1 to 11, characterized in that, The H sets of data modulation symbols occupy M sets of time-frequency resources, where M is a positive integer less than or equal to P and greater than 1. At least one set of data modulation symbols from the H sets of data modulation symbols is received on the time-frequency resource set of each of the M sets of time-frequency resources.

14. The method according to any one of claims 4 to 11, characterized in that, The A demodulation reference signal groups correspond to one time-frequency resource set; or... The A demodulation reference signal groups correspond to M time-frequency resource sets, where M is a positive integer less than or equal to P and greater than 1.

15. The method according to claim 14, characterized in that, In the case where the A demodulation reference signal groups correspond to the M time-frequency resource sets, the m-th time-frequency resource set among the M time resource sets corresponds to A in the A demodulation reference signal groups. m The demodulation reference signal group, wherein A m Less than A, m∈{1,2,...,M}.

16. The method according to any one of claims 1 to 15, characterized in that, The P demodulation reference signals satisfy at least one of the following: The P demodulation reference signals correspond one-to-one with the P synchronization signals; Each of the P demodulation reference signals corresponds to one synchronization signal; Of the P demodulation reference signals, some of the demodulation reference signals correspond to the synchronization signal, and the other demodulation reference signals correspond to the tracking reference signal. The P demodulation reference signals include at least one first demodulation reference signal, and one of the first demodulation reference signals corresponds to at least two synchronization signals.

17. The method according to claim 16, characterized in that, The method further includes at least one of the following: The P synchronization signals are determined according to a first predetermined rule; According to a second predetermined rule, at least two synchronization signals are determined corresponding to a first demodulation reference signal; A first demodulation reference signal corresponding to the at least two synchronization signals is determined according to a third predetermined rule; Receive first signaling information, wherein the first signaling information includes at least one of the following: the P synchronization signals, at least two synchronization signals corresponding to the first demodulation reference signal, and the first demodulation reference signal corresponding to the at least two synchronization signals; Based on the parameters of the synchronization signal, at least one of the following is determined: the P synchronization signals, at least two synchronization signals corresponding to the first demodulation reference signal, and the first demodulation reference signal corresponding to the at least two synchronization signals.

18. The method according to claim 16, characterized in that, The parameters of one of the P demodulation reference signals are obtained based on the synchronization signal corresponding to that demodulation reference signal; the parameters include at least one of the following: Quasi-co-located reference signal; The sequence parameters of a demodulated reference signal; The time-domain resources occupied by a demodulation reference signal; The frequency domain resources occupied by a demodulation reference signal; The code domain resources occupied by a demodulation reference signal; The channel large-scale parameters of a demodulation reference signal.

19. The method according to claim 16, characterized in that, In the case where multiple demodulation reference signals in the P demodulation reference signals correspond to multiple synchronization signals, and the multiple demodulation reference signals correspond to the generation parameters of a scrambling sequence, the parameters of the multiple synchronization signals all correspond to the generation parameters of the scrambling sequence.

20. The method according to claim 16, characterized in that, At least one of the following must be satisfied: The P synchronization signals include at least two synchronization signals, and the physical cell indices corresponding to the different synchronization signals among the at least two synchronization signals are different. The P synchronization signals include at least two synchronization signals, and the synchronization signal sequences corresponding to the different synchronization signals among the at least two synchronization signals are different. When at least two of the P synchronization signals correspond to the same synchronization signal sequence and different synchronization signal blocks, the different modulation symbol sets in the H data modulation symbol sets corresponding to the at least two synchronization signals also include different common information. When at least two of the P synchronization signals correspond to different synchronization signal sequences, the different data modulation symbol sets in the H data modulation symbol sets corresponding to the at least two synchronization signals only include the same common information and do not include different common information.

21. The method according to any one of claims 1 to 20, characterized in that, The resource multiplexing method of the P demodulation reference signals includes at least one of the following: time division multiplexing, frequency division multiplexing, and code division multiplexing; When the resource multiplexing method of the P demodulation reference signals includes code division multiplexing, at least two of the P demodulation reference signals adopt the code division multiplexing, and the at least two demodulation reference signals satisfy at least one of the following: The at least two demodulation reference signals each correspond to the same master sequence, which is determined based on the parameters of one or more synchronization signals among a plurality of synchronization signals corresponding to the at least two demodulation reference signals. The at least two demodulation reference signals correspond one-to-one with at least two orthogonal covering codes; Each of the at least two demodulation reference signals is determined based on the product of the orthogonal covering code corresponding to each demodulation reference signal and the parent sequence.

22. The method according to any one of claims 1 to 20, characterized in that, The P demodulation reference signals are determined based on at least one of the following: Reservation rules; Signaling information; Parameters of the synchronization signal; Parameters of the demodulation reference signal.

23. A communication method, characterized in that, Applied to a second communication node, the method includes: P demodulation reference signals are transmitted through a common channel. The P demodulation reference signals correspond to H sets of data modulation symbols. The H sets of data modulation symbols correspond to the same common information. P is an integer greater than or equal to 1, and H is a positive integer less than or equal to P.

24. The method according to claim 23, characterized in that, Each of the P demodulation reference signals corresponds to one of the H data modulation symbol sets, and each of the H data modulation symbol sets corresponds to at least one of the P demodulation reference signals. Each data symbol set is transmitted on the port corresponding to each of the at least one demodulation reference signals in its corresponding set.

25. The method according to claim 23, characterized in that, The H sets of data modulation symbols correspond to A different redundant versions, where A is a positive integer less than or equal to H. The A different redundant versions are A different redundant versions of the same public information during channel coding, where A is a positive integer less than or equal to P.

26. The method according to claim 25, characterized in that, The P demodulation reference signals include A demodulation reference signal groups, and the A demodulation reference signal groups correspond one-to-one with the A redundant versions.

27. A communication device, characterized in that, include: Memory and processor; Memory and processor are coupled; The memory is used to store instructions that can be executed by the processor; When the processor executes the instructions, it performs the method as described in any one of claims 1-26.

28. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1-26.

29. A computer program product, characterized in that, The computer program product includes computer program instructions that, when executed, implement the method as described in any one of claims 1-26.

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