Information Transmission Method, Apparatus, Terminal, Device and Medium

Abstract

The present disclosure relates to an information transmission method, apparatus, terminal, device, and medium, belonging to the field of communication technologies. The method includes: jointly transmitting information carried by at least two Physical Downlink Control Channels (PDCCHs) through at least two Transmission and Reception Points (TRPs) or antenna panels, where the information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels. This method is beneficial to improving the reliability of PDCCH transmission.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to an information transmission method, apparatus, terminal, device, and medium. Background Art

[0002] In the 5G New Radio (NR) technology, when a network device has multiple Transmission Reception Points (TRPs), the network device can use multiple TRPs to cooperate and simultaneously transmit data to a terminal through multiple beams at multiple angles to improve the data transmission quality.

[0003] In the related art, the network device uses multiple TRPs to cooperate to transmit the information carried on the Physical Downlink Shared Channel (PDSCH), while the information carried on the Physical Downlink Control Channel (PDCCH) is transmitted by a single TRP. If the link between the TRP and the terminal is blocked or in a deep fading state, the terminal will not be able to obtain the information carried on the PDCCH, and the transmission reliability of the PDCCH is relatively low. Summary of the Invention

[0004] Embodiments of the present disclosure provide an information transmission method, apparatus, terminal, device, and medium. The technical solutions are as follows:

[0005] According to a first aspect of the embodiments of the present disclosure, there is provided an information transmission method, the method including: jointly transmitting, by at least two Transmission Reception Points (TRPs) or antenna panels, the information carried on at least two Physical Downlink Control Channels (PDCCHs), where the information carried on different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels.

[0006] According to a second aspect of the embodiments of the present disclosure, there is provided an information transmission method, the method including: receiving the information carried on at least two Physical Downlink Control Channels (PDCCHs) jointly transmitted by a network device through at least two Transmission Reception Points (TRPs) / antenna panels, where the information carried on different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels.

[0007] In an embodiment of the present disclosure, the information includes a demodulation reference signal (DMRS) and downlink control information (DCI). The PDCCH carries the information in units of resource element groups (REGs). In one REG, the REG includes a plurality of first resource elements (REs) and a plurality of second REs. The first REs are used to carry the DMRS, and the second REs are used to carry the DCI.

[0008] Optionally, the plurality of first REs form at least two orthogonal DMRS ports through frequency division multiplexing.

[0009] Optionally, the plurality of first REs are divided into at least two groups through frequency division multiplexing, and each group of first REs forms two orthogonal DMRS ports through code division multiplexing.

[0010] Optionally, the plurality of first REs form at least two orthogonal DMRS ports through code division multiplexing.

[0011] Optionally, the DMRS occupies 4 first resource elements (REs) in the REG, and the 4 first REs are evenly distributed in the REG.

[0012] Exemplarily, the 4 first REs are respectively the 1st RE, the 4th RE, the 7th RE, and the 10th RE in the REs.

[0013] Optionally, the DCI information carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is the same.

[0014] Optionally, the DCI information carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is different.

[0015] Optionally, the DCI carried by different PDCCHs among the at least two PDCCHs is scrambled with different scrambling codes; or, the CRC check bits of the DCI carried by different PDCCHs among the at least two PDCCHs are scrambled with different scrambling codes.

[0016] Optionally, the different scrambling codes are configured by a network device; or,

[0017] the different scrambling codes are generated according to a predetermined rule based on a scrambling code configured by a network device; or,

[0018] the different scrambling codes are generated according to a predetermined rule based on a cell ID.

[0019] Optionally, different ones of the at least two PDCCHs carry a part of the coded bits of a DCI, and each part includes a plurality of consecutive coded bits in the coded bits of a DCI.

[0020] According to a third aspect of the embodiments of the present disclosure, there is provided an information transmission apparatus, the apparatus including:

[0021] A sending module, configured to jointly send information carried by at least two PDCCHs through at least two transmit and receive points (TRPs) or antenna panels, and information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels.

[0022] According to a fourth aspect of the embodiments of the present disclosure, there is provided an information transmission apparatus, the apparatus including:

[0023] A receiving module, configured to receive information carried by at least two PDCCHs jointly sent by a network device through at least two transmit and receive points (TRPs) / antenna panels, and information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels.

[0024] According to a fifth aspect of the embodiments of the present disclosure, there is provided a network device, the network device including:

[0025] A processor;

[0026] A memory for storing instructions executable by the processor;

[0027] Wherein, the processor is configured to load and execute the executable instructions to implement the information transmission method as described in any one of the foregoing items.

[0028] According to a sixth aspect of the embodiments of the present disclosure, there is provided a terminal, the terminal including:

[0029] A processor;

[0030] A memory for storing instructions executable by the processor;

[0031] Wherein, the processor is configured to load and execute the executable instructions to implement the information transmission method as described in any one of the foregoing items.

[0032] According to a seventh aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium, when the instructions in the computer-readable storage medium are executed by a processor, capable of executing the information transmission method as described in any one of the foregoing first aspects, or capable of executing the information transmission method as described in any one of the foregoing second aspects.

[0033] In the embodiments of the present disclosure, by collaborating multiple TRPs or multiple antenna panels to transmit the information carried on the PDCCH, the reliability of the PDCCH can be improved, thereby enhancing the reliability and coverage of communication services, especially Ultra-Reliable and Low Latency Communication (URLLC) services.

[0034] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Brief Description of the Drawings

[0035] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0036] Figure 1 Shown is a block diagram of a communication system provided by an exemplary embodiment of the present disclosure;

[0037] Figure 2 Is a flowchart of a method for information transmission shown according to an exemplary embodiment;

[0038] Figure 3 Is a flowchart of a method for information transmission shown according to an exemplary embodiment;

[0039] Figure 4 Is a flowchart of a method for information transmission shown according to an exemplary embodiment;

[0040] Figure 5 Is a schematic diagram of the resource distribution of a PDCCH shown according to an exemplary embodiment;

[0041] Figure 6 Is a schematic diagram of the resource distribution of a PDCCH shown according to an exemplary embodiment;

[0042] Figure 7 Is a schematic diagram of the resource distribution of a PDCCH shown according to an exemplary embodiment;

[0043] Figure 8 Is a schematic diagram of the structure of an information transmission device shown according to an exemplary embodiment;

[0044] Figure 9 Is a schematic diagram of the structure of an information transmission device shown according to an exemplary embodiment;

[0045] Figure 10 Is a block diagram of a network device shown according to an exemplary embodiment;

[0046] Figure 11It is a block diagram of a terminal shown according to an exemplary embodiment. Detailed implementation manners

[0047] Here, the exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0048] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present disclosure. The singular forms "a" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0049] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "when" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0050] It should be understood that although the steps are described in a numbered manner for ease of understanding in the embodiments of the present disclosure, these numbers do not represent the execution order of the steps, nor do they mean that the steps with sequential numbers must be executed together. It should be understood that one or several of the steps with sequential numbers may be executed alone to solve the corresponding technical problems and achieve the predetermined technical solutions. Even if multiple steps are shown together exemplarily in the drawings, it does not mean that these steps must be executed together; the drawings are only for ease of understanding and exemplarily list these steps together.

[0051] Figure 1 Shown is a block diagram of a communication system provided by a schematic embodiment of the present disclosure, as Figure 1 shown, the communication system may include: a network side 12 and a terminal 13.

[0052] The network side 12 includes several network devices 120. The network device 120 may be a base station, which is a device deployed in the access network to provide wireless communication functions for terminals. The base station may be either the base station of the serving cell of the terminal 13 or the base station of an adjacent cell of the serving cell of the terminal 13. The base station may include various forms of macro base stations, micro base stations, relay stations, access points, transmission and reception points (TRPs), etc. In systems adopting different radio access technologies, the names of the devices with base station functions may be different. In the 5G NR system, it is called gNodeB or gNB. With the evolution of communication technologies, the description of the name "base station" may change. The network device 120 may also be a Location Management Function (LMF).

[0053] The terminal 13 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, which have wireless communication functions, as well as various forms of user equipment, mobile stations (MS), terminals, Internet of Things (IoT) devices, Industry Internet of Things (IIoT) devices, etc. For the sake of convenient description, the above-mentioned devices are collectively referred to as terminals. The network device 120 and the terminal 13 communicate with each other through a certain air interface technology, such as the Uu interface.

[0054] In the embodiments of the present disclosure, the network device 120 has one or more Transmission Reception Points (TRPs), also known as transmission points, and each TRP has one or more antenna panels. Multiple TRPs can simultaneously perform data transmission with a terminal 13.

[0055] Exemplarily, as Figure 1 shown, two network devices 120 simultaneously send the information carried on the PDCCH to the terminal 13 through a TRP respectively. Optionally, a TRP uses one or more antenna panels to send information to the terminal 13.

[0056] The terminal 13 has at least two antenna panels, and by adjusting the parameters of the antenna panels, the direction of the receiving beam of the antenna panels can be changed.

[0057] The communication system and service scenarios described in the embodiments of the present disclosure are used to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. As can be known to those of ordinary skill in the art, with the evolution of communication systems and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems.

[0058] Figure 2 is a flowchart of an information transmission method shown according to an exemplary embodiment. This method can be executed by a network device. Refer to Figure 2 and the method includes the following steps:

[0059] In step 101, information carried by at least two PDCCHs is jointly transmitted through at least two TRPs or antenna panels, and information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels.

[0060] In the embodiments of the present disclosure, by collaborating multiple TRPs or multiple antenna panels to transmit information carried on the PDCCH, the reliability of the PDCCH can be improved, thereby improving the reliability and coverage of communication services, especially URLLC services.

[0061] In the embodiments of the present disclosure, the information includes a demodulation reference signal DMRS and downlink control information DCI. The PDCCH carries the information in units of resource element groups REG. In one REG, the REG includes multiple first resource elements RE and multiple second REs. The first RE is used to carry the DMRS, and the second RE is used to carry the DCI.

[0062] Optionally, the multiple first REs form at least two orthogonal DMRS ports through frequency division multiplexing.

[0063] Optionally, the multiple first REs are divided into at least two groups through frequency division multiplexing, and each group of first REs forms two orthogonal DMRS ports through code division multiplexing.

[0064] Optionally, the multiple first REs form at least two orthogonal DMRS ports through code division multiplexing.

[0065] Optionally, the DMRS occupies 4 first resource elements RE in the REG, and the 4 first REs are evenly distributed in the REG.

[0066] Exemplarily, the 4 first REs are respectively the 1st RE, the 4th RE, the 7th RE, and the 10th RE in the RE.

[0067] Optionally, the DCI information carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is the same.

[0068] Optionally, the DCI information carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is different.

[0069] Optionally, the DCI carried by different PDCCHs among the at least two PDCCHs is scrambled with different scrambling codes; or, the CRC check bits of the DCI carried by different PDCCHs among the at least two PDCCHs are scrambled with different scrambling codes.

[0070] Optionally, the different scrambling codes are configured by a network device; or, the different scrambling codes are generated based on a scrambling code configured by the network device according to a predetermined rule; or, the different scrambling codes are generated based on a cell ID according to a predetermined rule.

[0071] Optionally, different PDCCHs among the at least two PDCCHs carry a part of the coded bits of a DCI, and each part includes multiple consecutive coded bits in the coded bits of a DCI.

[0072] It should be noted that the foregoing step 101 and the above optional steps can be combined arbitrarily.

[0073] Figure 3 is a flowchart of an information transmission method shown according to an exemplary embodiment. This method can be executed by a terminal. Refer to Figure 3 and this method includes the following steps:

[0074] In step 201, receive the information carried by at least two PDCCHs jointly sent by a network device through at least two transmit and receive points TRP / antenna panels, where the information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels.

[0075] In the embodiments of the present disclosure, by collaborating multiple TRPs or multiple antenna panels to transmit the information carried on the PDCCH, the reliability of the PDCCH can be improved, thereby improving the reliability and coverage of communication services, especially URLLC services.

[0076] In the embodiments of the present disclosure, the information includes a demodulation reference signal DMRS and a downlink control information DCI. The PDCCH carries the information in units of resource element groups REG. In one REG, the REG includes multiple first resource elements REs and multiple second REs. The first RE is used to carry the DMRS, and the second RE is used to carry the DCI.

[0077] Optionally, the multiple first resource elements (REs) form at least two orthogonal demodulation reference signal (DMRS) ports through frequency division multiplexing.

[0078] Optionally, the multiple first REs are divided into at least two groups through frequency division multiplexing, and each group of first REs forms two orthogonal DMRS ports through code division multiplexing.

[0079] Optionally, the multiple first REs form at least two orthogonal DMRS ports through code division multiplexing.

[0080] Optionally, the DMRS occupies 4 first REs in the resource element group (REG), and the 4 first REs are evenly distributed in the REG.

[0081] Exemplarily, the 4 first REs are respectively the 1st RE, the 4th RE, the 7th RE, and the 10th RE in the REs.

[0082] Optionally, the downlink control information (DCI) carried by the REs corresponding to different physical downlink control channels (PDCCHs) among the at least two PDCCHs is the same.

[0083] Optionally, the DCI carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is different.

[0084] Optionally, the DCI carried by different PDCCHs among the at least two PDCCHs is scrambled with different scrambling codes; or, the cyclic redundancy check (CRC) check bits of the DCI carried by different PDCCHs among the at least two PDCCHs are scrambled with different scrambling codes.

[0085] Optionally, the different scrambling codes are configured by the network device; or, the different scrambling codes are generated based on a scrambling code configured by the network device according to a predetermined rule; or, the different scrambling codes are generated based on the cell ID according to a predetermined rule.

[0086] Optionally, different PDCCHs among the at least two PDCCHs carry a part of the coded bits of a DCI, and each part includes multiple consecutive coded bits in the coded bits of a DCI.

[0087] Optionally, the method further includes:

[0088] Performing channel estimation according to the received DMRS to obtain the channel estimation value of the corresponding PDCCH;

[0089] Demodulating and performing channel decoding on the corresponding DCI according to the channel estimation value.

[0090] It should be noted that the foregoing step 201 and the above optional steps can be combined arbitrarily.

[0091] Figure 4 is a flowchart of an information transmission method shown according to an exemplary embodiment. This method can be jointly executed by a terminal and a network device. Refer to Figure 4 , this method includes the following steps:

[0092] In step 301, the network device maps information to resources corresponding to at least two PDCCHs.

[0093] In the embodiments of the present disclosure, the information carried on the PDCCH includes DMRS and DCI.

[0094] Through this step 301, the network device realizes carrying information through at least two PDCCHs. Here, the resource refers to time-frequency resource.

[0095] For a PDCCH, the resource is in units of REG. One REG corresponds to one OFDM symbol in the time domain and 12 subcarriers in the frequency domain. One REG includes 12 REs located in the same OFDM symbol.

[0096] In the embodiments of the present disclosure, one REG includes a plurality of first REs and a plurality of second REs. The first REs are used to carry DMRS, and the second REs are used to carry DCI. The second REs are the REs in the REG other than the first REs. In other words, in the embodiments of the present disclosure, the REs occupied by DMRS are called first REs, and the REs occupied by DCI are called second REs.

[0097] Optionally, in one REG, the number of REs occupied by DMRS is 4, that is, the number of first REs is 4, and the 4 first REs are evenly distributed in the REG.

[0098] In the related art, in one REG, the number of REs occupied by DMRS is 3, which is 1 / 4 of the number of REs in the REG. While in the embodiments of the present disclosure, it is 1 / 3 of the number of REs in the REG. The density of the REs occupied by DMRS increases. At the same time, since the REs occupied by DMRS are evenly distributed in the REG group to which they belong, after the terminal receives the PDCCH, it can obtain the optimal channel estimation performance through interpolation according to the DMRS in the PDCCH at different RE positions in the entire REG, thereby improving the reliability of DCI information transmission.

[0099] Optionally, the DMRS ports corresponding to different PDCCHs are different, or the DMRS ports corresponding to different PDCCHs are the same. Here, the DMRS port refers to the antenna port used to send DMRS. Below, the case where a PDCCH corresponds to multiple DMRS ports will be described by taking 4 first REs evenly distributed in the REG to which they belong as an example.

[0100] Figure 5 A schematic diagram of the resource distribution of a PDCCH provided by an embodiment of the present disclosure. As Figure 5 shown, one REG includes 12 REs, namely the 0th RE, the 1st RE, the 2nd RE... the 11th RE. Among them, DMRS occupies the 1st RE, the 4th RE, the 7th RE and the 10th RE. DCI occupies the 0th RE, the 2nd - 3rd REs, the 5th - 6th REs, the 8th - 9th REs and the 11th RE.

[0101] In a first possible implementation manner, the multiple first REs form at least two orthogonal DMRS ports in a frequency - division multiplexing (FDM) manner.

[0102] For example, as Figure 5 shown, the 1st RE and the 7th RE form a DMRS port (for example, port 0), and the 4th RE and the 10th RE form another DMRS port (for example, port 1). It can be seen that in Figure 5 , the 4 first REs are divided into two groups by FDM, each group includes two first REs, and each group of first REs forms a DMRS port.

[0103] In this case, the two DMRS ports are orthogonal by frequency - division multiplexing, and it can support the transmission of one layer corresponding to each TRP or antenna panel.

[0104] From Figure 5 it can be seen that the first REs in each group of first REs are also evenly distributed in the REG. In this way, for each PDCCH, the optimal channel estimation performance can be obtained by interpolation according to the different RE positions of DMRS in the entire REG, thereby further improving the reliability of DCI transmission.

[0105] In a second possible implementation manner, the multiple first REs are divided into at least two groups by FDM, and each group of first REs forms two orthogonal DMRS ports in a code - division multiplexing (CDM) manner.

[0106] For example, as Figure 6As shown, the 4 first REs are divided into two groups by means of FDM. One group includes the 1st RE and the 7th RE, and the 1st RE and the 7th RE form two orthogonal DMRS ports (such as port0&2) by means of CDM. The other group includes the 4th RE and the 10th RE, and the 4th RE and the 10th RE form another two orthogonal DMRS ports (such as port1&3) by means of code division multiplexing.

[0107] Optionally, in this second possible implementation, the orthogonality of the corresponding two DMRS ports is achieved by using a Time Domain-Orthogonal cover code (TD-OCC), which can support data transmission with 2 layers corresponding to each TRP or antenna panel. In this case, each TRP or antenna panel can respectively correspond to different DMRS ports. For example, the PDCCH sent by one TRP can correspond to port0, and the PDCCH sent by another TRP can correspond to port2.

[0108] Exemplarily, the TD-OCC code adopts the form in Table 1.

[0109] Serial number n <![CDATA[OCC code w n > 0 [+1 +1] 1 [+1 -1]

[0110] Table 1. TD-OCC code with a length of 2

[0111] In the third possible implementation, the multiple first REs form at least two orthogonal DMRS ports by means of CDM.

[0112] As Figure 7 shown, the 4 first REs form two orthogonal DMRS ports by means of CDM. The 1st RE, the 4th RE, the 7th RE, and the 10th RE form at least two orthogonal DMRS ports (such as port0 and port1) by means of CDM.

[0113] Optionally, in this third possible implementation, the orthogonality of the corresponding two DMRS ports is achieved by using a TD-OCC with a length of 2. For example, the TD-OCC shown in Table 1. This method can support 1 or 2 orthogonal DMRS ports, thus supporting the joint transmission of up to 2 PDCCHs.

[0114] In this third possible implementation, the number of DMRS ports formed is related to the length of the TD-OCC adopted by CDM. By adopting a TD-OCC with a greater length, the number of DMRS ports can be increased, thereby supporting more TRPs or antenna panel collaborations. For example, as shown in Table 2, when the length of the TD-OCC is 4, it can support 1 to 4 orthogonal DMRS ports, thereby supporting the joint transmission of up to 4 PDCCHs.

[0115] n <![CDATA[w n > 0 [+1 +1 +1 +1] 1 [+1 -j -1 +j] 2 [+1 -1 +1 -1] 3 [+1 +j -1 -j]

[0116] Table 2. TD-OCC code with a length of 4

[0117] Exemplarily, in the second and third possible implementations, the DMRS corresponding to the DMRS port is determined by the following formula:

[0118] y(k) = w n ·d(k) (1)

[0119] In formula (1), y(k) is the DMRS sequence after adopting the TD-OCC code. w n is the TD-OCC code, and d(k) is the initial DMRS sequence.

[0120] The initial DMRS sequence is generated using a pseudo-random sequence according to formula (2) on symbol l:

[0121]

[0122] In formula (2), m is the serial number of the DMRS sequence, m = 0, 1…, M - 1, M is equal to the bandwidth allocated by the PDCCH (i.e., the number of REGs multiplied by the number of REs in each REG), and c(i) is initialized by formula (3).

[0123]

[0124] In formula (3), is the number of OFDM symbols in a time slot, which is fixed at 14 for the NR system, is the time slot number within the radio frame; l is the symbol position within the time slot; N ID ∈{0, 1,..., 65535}, which is configured by a high-layer parameter. If not configured by the high layer, i.e., it is equal to the PCI.

[0125] In the embodiments of the present disclosure, by designing multiple DMRS ports, independent DCI information or partial information of the same DCI can be transmitted using different DMRS ports on the same time-frequency resources, thereby implementing the joint transmission of information carried on the PDCCH by multiple TRPs or antenna panels.

[0126] In the embodiments of the present disclosure, joint transmission is also referred to as NonCoherent-Joint Transmission (NC-JT).

[0127] It should be noted that in other embodiments, different PDCCHs correspond to the same DMRS port. In this case, the DCI information carried by the REs corresponding to different PDCCHs is also the same, that is, the information carried by different PDCCHs is exactly the same, and it is sent to the terminal by at least two TRPs and antenna panels in a Space-division multiplexing (SDM) manner.

[0128] In the embodiments of the present disclosure, the network device provides beams in different directions through N TRPs, and sends N PDCCHs through the beams in different directions, so as to implement the SDM transmission of PDCCH.

[0129] Optionally, the N TRPs belong to the same network device, or belong to different network devices.

[0130] In this embodiment, each TRP has only one antenna panel. In some other embodiments, each TRP has multiple antenna panels, and different antenna panels of the same TRP can provide beams in different directions at different times. Then, the network device can use different antenna panels to send the information carried by the PDCCH.

[0131] To facilitate the understanding of the embodiments of the present disclosure, DCI is briefly described below. DCI is the payload carried on the PDCCH. In the embodiments of the present disclosure, DCI includes two parts: an information body and a check information. The information body includes downlink scheduling assignment, uplink scheduling grant, etc. The check information is the CRC bit obtained through scrambling operation, that is, the CRC bit modified by the terminal identifier. When the terminal receives the DCI, the terminal will adopt the same process, calculate the scrambled CRC bit according to the received payload, and then compare it with the received CRC bit. If the calculated CRC bit is the same as the received CRC bit, it means that the DCI is correctly received and belongs to the terminal. Exemplarily, the identifier of the terminal is C-RNTI.

[0132] After CRC scrambling, channel coding needs to be performed on the DCI to obtain the coded bits (or called information bits) of the DCI. Then, after rate matching, scrambling the coded bits of the DCI, and modulating the scrambled bits, DCI information is obtained, and the DCI information is mapped to the corresponding REs.

[0133] It should be noted that in the embodiments of the present disclosure, the DCI information is the information obtained after a series of processes on the DCI and is used to be carried on physical resources.

[0134] In the embodiments of the present disclosure, the DCI information carried by the REs corresponding to different PDCCHs may be the same or different.

[0135] When the DCI information carried by the REs corresponding to different PDCCHs is the same, for each PDCCH, the same processing is performed on the foregoing information part. For example, the same scrambling code is used to scramble the same DCI, and the same transmission parameters (such as coding parameters, modulation parameters, mapping parameters) are used for processing. In this case, the different PDCCHs sent by each TRP carry the same DCI, that is, the DCI carried by the PDCCHs sent by each TRP is repeated, supporting Single Frequency Network (SFN) transmission.

[0136] In this embodiment, the scrambling code is predefined, or the scrambling code is configured by a network device, for example, configured by high-layer signaling.

[0137] When the DCI information carried by the REs corresponding to different PDCCHs is different, it includes but is not limited to the following two cases:

[0138] First, different DCI carried by different PDCCHs among the at least two PDCCHs are scrambled with different scrambling codes, so as to obtain different DCI information.

[0139] Second, the CRC check bits of the DCI carried by different PDCCHs among the at least two PDCCHs are scrambled with different scrambling codes, so as to obtain different DCI information.

[0140] Optionally, in the first and second cases, the different scrambling codes are configured by a network device. For example, the network device configures a set of scrambling codes, and the set of scrambling codes includes multiple scrambling codes, such as (C-RNTI-1, C-RNTI-2,..., C-RNTI-m), where m represents the serial number of the scrambling code, and m is an integer greater than 1. For example, m is equal to the number of PDCCHs.

[0141] Optionally, the different scrambling codes are generated based on a scrambling code configured by a network device according to a predetermined rule. For example, when the network device configures a scrambling code, at least two scrambling codes are generated based on the scrambling code according to a predetermined rule, and the number of generated scrambling codes corresponds to the number of PDCCHs.

[0142] Optionally, the different scrambling codes are generated based on a Physical Cell Identifier (PCI) according to a predetermined rule. For example, when the network device does not configure a scrambling code, at least two scrambling codes are generated based on the PCI according to a predetermined rule, and the number of generated scrambling codes corresponds to the number of PDCCHs.

[0143] Exemplarily, the predetermined rule includes but is not limited to the following:

[0144] C-RNTI1 = mod(1 * C-RNTI, 65536) = C-RNTI,

[0145] C-RNTI2 = mod(2 * C-RNTI, 65536),

[0146] C-RNTI3 = mod(3 * C-RNTI, 65536), ……

[0147] C-RNTIm = mod(n * C-RNTI, 65536).

[0148] Wherein, C-RNTI is the scrambling code or PCI configured by the network device, mod(x, y) represents the remainder after the division operation of x and y, and m represents the serial number of the scrambling code.

[0149] Optionally, different PDCCHs among the at least two PDCCHs carry a part of the coded bits of a DCI, and each part includes multiple consecutive coded bits in the coded bits of a DCI.

[0150] For example, assume that two TRPs jointly transmit 2 PDCCHs, where one PDCCH carries the first half of the coded bits of the DCI, and the other PDCCH carries the second half of the coded bits of the DCI.

[0151] This step 301 includes: mapping the DMRS to the first RE in the REG; mapping the DCI information to the second RE in the REG.

[0152] It should be noted that in Figure 5 and Figure 6 In the shown cases, when the network device performs resource mapping, it maps the DMRS corresponding to each PDCCH to the first RE corresponding to that PDCCH, and for the first REs corresponding to other PDCCHs, when performing resource mapping, it will keep the first REs not carrying information. For example, assume that PDCCH1 corresponds to the 1st RE and the 7th RE, then the corresponding DMRS is mapped to the 1st RE and the 7th RE, while the 4th RE and the 10th RE are kept not carrying information.

[0153] In step 302, the network device jointly transmits the information carried by at least two PDCCHs through at least two TRPs or at least two antenna panels.

[0154] The information carried by different PDCCHs is transmitted through different TRPs or antenna panels.

[0155] Optionally, one PDCCH corresponds to at least one DMRS port, for example, 1 or 2 DMRS ports, and the DMRS ports corresponding to different PDCCHs are different.

[0156] In step 303, the terminal receives the information carried by at least two PDCCHs jointly transmitted by the network device through at least two TRPs or at least two antenna panels.

[0157] After the terminal receives the information carried by at least two PDCCHs, it first performs channel estimation according to the DMRS in the PDCCH respectively to obtain channel estimation values; then it demodulates and performs channel decoding on the received information according to the channel estimation values, and obtains DCI through independent or joint reception on multiple PDCCHs.

[0158] Here, performing channel decoding on the received information according to the channel estimation values includes the following situations:

[0159] First, when the transmission information (i.e., the aforementioned DCI information) of the same DCI carried by different PDCCHs is the same when mapped to physical resources, independent channel decoding can be performed on the DCI carried by each PDCCH; alternatively, before channel decoding, the DCIs carried by the received PDCCHs can be soft combined first, and then channel decoding can be performed on the DCI coding information.

[0160] Second, when the transmission information (i.e., the aforementioned DCI information) of the same DCI carried by different PDCCHs is different when mapped to physical resources, for example, in the two situations where the DCI information carried by the REs corresponding to different PDCCHs in step 301 is different, the channel decoding methods are as follows:

[0161] For the first situation where the DCI information carried by the REs corresponding to different PDCCHs in step 301 is different, that different DCIs carried by different PDCCHs are scrambled with different scrambling codes means that the coded bits of the DCI are scrambled with different scrambling codes, and the scrambling of the coded bits of the DCI is performed after channel coding, so soft combination can be performed before channel decoding, so there are two channel decoding methods: one is to perform independent channel decoding on the DCI carried by each PDCCH; the other is to first perform soft combination on the DCIs carried by the received PDCCHs before channel decoding, and then perform channel decoding on the DCI coding information;

[0162] For the second case where the DCI information carried by the REs corresponding to different PDCCHs in step 301 is different, since CRC scrambling is performed before channel coding, the transmission information of the same DCI carried by the PDCCH is different, and soft combining cannot be performed before channel decoding. Therefore, independent channel decoding needs to be performed on the information carried by each PDCCH;

[0163] Thirdly, when different PDCCHs carry different parts of the same DCI, it is necessary to first combine the DCI coding information before channel decoding carried by each received PDCCH, and then perform channel decoding.

[0164] In the embodiments of the present disclosure, by carrying the DCI information corresponding to the same DCI on multiple PDCCHs and transmitting them through different TRPs or antenna panels, the terminal can independently or jointly receive the DCI information on multiple PDCCHs, obtaining a certain combining gain and improving the accuracy of channel decoding. And carrying different parts of the same DCI on multiple PDCCHs and transmitting them through different TRPs or antenna panels can obtain a certain diversity gain and improve the accuracy of channel decoding.

[0165] Figure 8 It is a schematic structural diagram of an information transmission device shown according to an exemplary embodiment. The device has the functions of the terminal in the above method embodiments, and these functions can be implemented by hardware or by hardware executing corresponding software. As Figure 8 shown, the device 400 includes: a sending module 401. The sending module 401 is configured to jointly send the information carried by at least two physical downlink control channels (PDCCHs) through at least two transmit and receive points (TRPs) or antenna panels, and the information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels.

[0166] In the embodiments of the present disclosure, the information includes demodulation reference signals (DMRS) and downlink control information (DCI), the PDCCH carries the information in units of resource element groups (REGs), and in one REG, the REG includes a plurality of first resource elements (REs) and a plurality of second REs, the first REs are used to carry the DMRS, and the second REs are used to carry the DCI.

[0167] Optionally, the plurality of first REs form at least two orthogonal DMRS ports through frequency division multiplexing.

[0168] Optionally, the plurality of first REs are divided into at least two groups through frequency division multiplexing, and each group of first REs forms two orthogonal DMRS ports through code division multiplexing.

[0169] Optionally, the multiple first resource elements (REs) form at least two orthogonal demodulation reference signal (DMRS) ports through code division multiplexing.

[0170] Optionally, the DMRS occupies 4 first REs in the resource element group (REG), and the 4 first REs are evenly distributed in the REG.

[0171] Exemplarily, the 4 first REs are respectively the 1st RE, the 4th RE, the 7th RE, and the 10th RE in the REs.

[0172] Optionally, the downlink control information (DCI) carried by the REs corresponding to different physical downlink control channels (PDCCHs) among the at least two PDCCHs is the same.

[0173] Optionally, the DCI carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is different.

[0174] Optionally, the DCI carried by different PDCCHs among the at least two PDCCHs is scrambled with different scrambling codes; or, the cyclic redundancy check (CRC) check bits of the DCI carried by different PDCCHs among the at least two PDCCHs are scrambled with different scrambling codes.

[0175] Optionally, the different scrambling codes are configured by the network device; or,

[0176] the different scrambling codes are generated based on a scrambling code configured by the network device according to a predetermined rule; or,

[0177] the different scrambling codes are generated based on the cell ID according to a predetermined rule.

[0178] Optionally, different PDCCHs among the at least two PDCCHs carry a part of the coded bits of a DCI, and each part includes multiple consecutive coded bits in the coded bits of a DCI.

[0179] Figure 9 is a schematic structural diagram of an information transmission device shown according to an exemplary embodiment. The device has the functions of the network device in the above method embodiment, and these functions can be implemented by hardware or by hardware executing corresponding software. As Figure 9 shown, the device 500 includes: a receiving module 501. The receiving module 501 is configured to receive information carried by at least two PDCCHs jointly sent by the network device through at least two transmit and receive points (TRPs) / antenna panels, and the information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels.

[0180] In an embodiment of the present disclosure, the information includes a demodulation reference signal DMRS and downlink control information DCI. The PDCCH carries the information in units of REGs. In one REG, the REG includes a plurality of first resource elements (REs) and a plurality of second REs. The first REs are used to carry the DMRS, and the second REs are used to carry the DCI.

[0181] Optionally, the plurality of first REs form at least two orthogonal DMRS ports through frequency division multiplexing.

[0182] Optionally, the plurality of first REs are divided into at least two groups through frequency division multiplexing, and each group of first REs forms two orthogonal DMRS ports through code division multiplexing.

[0183] Optionally, the plurality of first REs form at least two orthogonal DMRS ports through code division multiplexing.

[0184] Optionally, the DMRS occupies 4 first resource elements (REs) in the REG, and the 4 first REs are evenly distributed in the REG.

[0185] Exemplarily, the 4 first REs are respectively the 1st RE, the 4th RE, the 7th RE, and the 10th RE in the REs.

[0186] Optionally, the DCI information carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is the same.

[0187] Optionally, the DCI information carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is different.

[0188] Optionally, the DCI carried by different PDCCHs among the at least two PDCCHs is scrambled with different scrambling codes; or, the CRC check bits of the DCI carried by different PDCCHs among the at least two PDCCHs are scrambled with different scrambling codes.

[0189] Optionally, the different scrambling codes are configured by a network device; or,

[0190] the different scrambling codes are generated according to a predetermined rule based on a scrambling code configured by a network device; or,

[0191] the different scrambling codes are generated according to a predetermined rule based on a cell ID.

[0192] Optionally, different PDCCHs among the at least two PDCCHs carry a part of the coded bits of a DCI, and each part includes a plurality of consecutive coded bits in the coded bits of a DCI.

[0193] Figure 10 is a block diagram of a network device 600 shown according to an exemplary embodiment. As Figure 10 shown, the network device 600 may include: a processor 601, a receiver 602, a transmitter 603, and a memory 604. The receiver 602, the transmitter 603, and the memory 604 are respectively connected to the processor 601 through a bus.

[0194] Among them, the processor 601 includes one or more processing cores. The processor 601 executes the methods performed by the network device in the information transmission method provided by the embodiments of the present disclosure by running software programs and modules. The memory 604 can be used to store software programs and modules. Specifically, the memory 604 can store an operating system 6041 and application program modules 6042 required for at least one function. The receiver 602 is used to receive communication data sent by other devices, and the transmitter 603 is used to send communication data to other devices.

[0195] In an exemplary embodiment, there is also provided a computer-readable storage medium, in which at least one instruction, at least one program segment, a code set, or an instruction set is stored. The at least one instruction, the at least one program segment, the code set, or the instruction set is loaded and executed by the processor to implement the steps performed by the network device in the information transmission method provided by the above-mentioned various method embodiments.

[0196] Figure 11 is a block diagram of a terminal 700 shown according to an exemplary embodiment. As Figure 11 shown, the terminal 700 may include: a processor 701, a receiver 702, a transmitter 703, a memory 704, and a bus 705.

[0197] The processor 701 includes one or more processing cores. The processor 701 executes various functional applications and information processing by running software programs and modules.

[0198] The receiver 702 and the transmitter 703 can be implemented as a communication component, and the communication component can be a communication chip.

[0199] The memory 704 is connected to the processor 701 through the bus 705.

[0200] The memory 704 can be used to store at least one instruction, and the processor 701 is used to execute the at least one instruction to perform the methods performed by the terminal in the information transmission method provided by the embodiments of the present disclosure.

[0201] In addition, the memory 704 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. The volatile or non-volatile storage devices include, but are not limited to: magnetic disks or optical discs, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).

[0202] In an exemplary embodiment, a computer-readable storage medium is further provided. At least one instruction, at least one segment of program, a code set or an instruction set is stored in the computer-readable storage medium. The at least one instruction, the at least one segment of program, the code set or the instruction set is loaded and executed by the processor to implement the steps performed by the terminal in the information transmission method provided in each of the above method embodiments.

[0203] An exemplary embodiment of the present disclosure further provides a communication system, which includes a network device and a terminal. The network device is the network device provided in the embodiment as Figure 10 shown in the embodiment. The terminal is the terminal provided in the embodiment as Figure 11 shown in the embodiment.

[0204] Those skilled in the art will readily conceive of other implementations of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and the embodiments are only to be regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0205] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. An information transmission method, characterized in that, The method includes: Jointly transmitting, by at least two transmit and receive points (TRPs) or antenna panels, information carried by at least two physical downlink control channels (PDCCHs), where information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels; Wherein, the information includes a demodulation reference signal (DMRS) and downlink control information (DCI), the PDCCH carries the information in units of resource element groups (REGs), in one REG, the REG includes a plurality of first resource elements (REs) and a plurality of second REs, the first REs are used to carry the DMRS, and the second REs are used to carry the DCI; The plurality of first REs form at least two orthogonal DMRS ports through frequency division multiplexing; or, the plurality of first REs are divided into at least two groups through frequency division multiplexing, and each group of first REs forms two orthogonal DMRS ports through code division multiplexing; or, the plurality of first REs form at least two orthogonal DMRS ports through code division multiplexing; Wherein, DMRS ports corresponding to different PDCCHs are different, the number of the first REs is 4, and the 4 first REs are evenly distributed in the REG.

2. The method according to claim 1, wherein The 4 first REs are respectively the 1st RE, the 4th RE, the 7th RE, and the 10th RE among the plurality of REs.

3. The method according to any one of claims 1 to 2, characterized in that DCI information carried by REs corresponding to different PDCCHs among the at least two PDCCHs is the same.

4. The method according to any one of claims 1 to 2, characterized in that DCI information carried by REs corresponding to different PDCCHs among the at least two PDCCHs is different.

5. The method according to claim 4, characterized in that DCI carried by different PDCCHs among the at least two PDCCHs is scrambled with different scrambling codes; or, cyclic redundancy check (CRC) check bits of DCI carried by different PDCCHs among the at least two PDCCHs are scrambled with different scrambling codes.

6. The method according to claim 5, wherein The different scrambling codes are configured by a network device; or, The different scrambling codes are generated based on a scrambling code configured by a network device according to a predetermined rule; or, The different scrambling codes are generated based on a cell ID according to a predetermined rule.

7. The method according to any one of claims 1 to 2, characterized in that Different PDCCHs among the at least two PDCCHs carry a part of the coded bits of a DCI, and each part includes a plurality of consecutive coded bits in the coded bits of a DCI.

8. An information transmission method, characterized in that, The method includes: Receiving information carried by at least two PDCCHs jointly transmitted by a network device through at least two transmit and receive points (TRPs) or antenna panels, where information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels; Wherein, the information includes a demodulation reference signal (DMRS) and downlink control information (DCI), the PDCCH carries the information in units of resource element groups (REGs), in one REG, the REG includes a plurality of first resource elements (REs) and a plurality of second REs, the first REs are used to carry the DMRS, and the second REs are used to carry the DCI; The multiple first resource elements (REs) form at least two orthogonal demodulation reference signal (DMRS) ports through frequency division multiplexing; or, the multiple first REs are divided into at least two groups through frequency division multiplexing, and each group of first REs forms two orthogonal DMRS ports through code division multiplexing; or, the multiple first REs form at least two orthogonal DMRS ports through code division multiplexing; Among them, the DMRS ports corresponding to different physical downlink control channels (PDCCHs) are different, the number of the first REs is 4, and the 4 first REs are evenly distributed in the resource element group (REG).

9. The method according to claim 8, wherein The 4 first REs are respectively the 1st RE, the 4th RE, the 7th RE, and the 10th RE among the multiple REs.

10. The method according to any one of claims 8 to 9, characterized in that The downlink control information (DCI) carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is the same.

11. The method according to any one of claims 8 to 9, characterized in that The DCI carried by the REs corresponding to different PDCCHs among the at least two PDCCHs is different.

12. The method according to claim 11, wherein The DCI carried by different PDCCHs among the at least two PDCCHs is scrambled with different scrambling codes to obtain different DCI information; or, the cyclic redundancy check (CRC) check bits of the DCI carried by different PDCCHs among the at least two PDCCHs are scrambled with different scrambling codes.

13. The method according to claim 12, wherein, the different scrambling codes are configured by a network device; or, the different scrambling codes are generated according to a predetermined rule based on a scrambling code configured by a network device; or, the different scrambling codes are generated according to a predetermined rule based on a cell identifier (ID).

14. The method according to any one of claims 8 to 9, characterized in that, Different PDCCHs among the at least two PDCCHs carry a part of the coded bits of a DCI, and each part includes multiple consecutive coded bits in the coded bits of a DCI.

15. An information transmission device, characterized in that, The apparatus comprises: a transmitting module, configured to jointly transmit the information carried by at least two PDCCHs through at least two transmit and receive points (TRPs) or antenna panels, and the information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels; Among them, the information includes a demodulation reference signal (DMRS) and downlink control information (DCI), the PDCCH carries the information in units of resource element groups (REGs), in a REG, the REG includes multiple first resource elements (REs) and multiple second REs, the first REs are used to carry the DMRS, and the second REs are used to carry the DCI; The multiple first REs form at least two orthogonal DMRS ports through frequency division multiplexing; or, the multiple first REs are divided into at least two groups through frequency division multiplexing, and each group of first REs forms two orthogonal DMRS ports through code division multiplexing; or, the multiple first REs form at least two orthogonal DMRS ports through code division multiplexing; Among them, the DMRS ports corresponding to different PDCCHs are different, the number of the first REs is 4, and the 4 first REs are evenly distributed in the REG.

16. An information transmission device, characterized in that, The apparatus comprises: A receiving module, configured to receive information carried by at least two Physical Downlink Control Channels (PDCCHs) jointly transmitted by a network device through at least two Transmission and Reception Points (TRPs) / antenna panels, where the information carried by different PDCCHs among the at least two PDCCHs is transmitted through different TRPs or antenna panels; Wherein, the information includes Demodulation Reference Signals (DMRS) and Downlink Control Information (DCI), the PDCCH carries the information in units of Resource Element Groups (REGs), and in one REG, the REG includes a plurality of first Resource Elements (REs) and a plurality of second REs, the first REs are used to carry the DMRS, and the second REs are used to carry the DCI; The plurality of first REs form at least two orthogonal DMRS ports through frequency division multiplexing; or, the plurality of first REs are divided into at least two groups through frequency division multiplexing, and each group of first REs forms two orthogonal DMRS ports through code division multiplexing; or, the plurality of first REs form at least two orthogonal DMRS ports through code division multiplexing; Wherein, the DMRS ports corresponding to different PDCCHs are different, the number of the first REs is 4, and the 4 first REs are evenly distributed in the REG.

17. A terminal, characterized in that, The terminal includes: A processor; A memory for storing processor-executable instructions; Wherein, the processor is configured to load and execute the executable instructions to implement the information transmission method according to any one of claims 8 to 14.

18. A network device, characterized in that, The network device includes: A processor; A memory for storing processor-executable instructions; Wherein, the processor is configured to load and execute the executable instructions to implement the information transmission method according to any one of claims 1 to 7.

19. A computer-readable storage medium, characterized in that, When the instructions in the computer-readable storage medium are executed by the processor, it can execute the information transmission method according to any one of claims 1 to 7, or can execute the information transmission method according to any one of claims 8 to 14.

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