Downlink control information sending method, device and readable storage medium

Abstract

The present disclosure discloses a method for sending downlink control information, which belongs to the field of wireless communication technology. The method includes: obtaining the number of transmission blocks scheduled by the downlink control information; and determining whether to compress the information field in the downlink control information according to the number of transmission blocks, and when compression is required, sending the downlink control information according to the corresponding compression method. The present disclosure obtains the number of transmission blocks scheduled by the downlink control information through the base station, thereby obtaining the compression method corresponding to the number of transmission blocks, and compresses the sent downlink control information to a corresponding degree according to the compression method, so that the base station can flexibly adjust the compression degree of the downlink control information according to the number of transmission blocks, thereby improving the flexibility of scheduling the transmission blocks of the downlink control information while limiting the number of bits of the downlink control information.

Description

[0001] This application is a divisional application of the invention patent with application number 201980000822.0 filed on May 9, 2019, and invention name “Downlink control information sending method, device and readable storage medium”. Technical Field

[0002] The present disclosure relates to the field of wireless communication technologies, and in particular to a method and device for sending downlink control information, and a readable storage medium. Background Art

[0003] With the development of wireless communication technology, the Internet of Things (IoT) has brought many conveniences to people's lives and work. Among them, Machine Type Communication (MTC) is one of the typical representatives of cellular IoT technology applications.

[0004] In the related art, for MTC type communication services, when the terminal transmits MTC type data, it needs to know in advance the resource location when sending the MTC type data and the corresponding modulation and demodulation mode and other information. This information can be notified to the terminal in advance by the base station through downlink control information (Downlink Control Information, DCI). For example, the base station can send the generated physical resource block (Physical resource block, PRB) to the terminal through DCI. Usually the base station needs to allocate more bits in the DCI to express the PRB resource allocation indication field. In order to save the number of bits allocated by the base station to the DCI, the base station can usually compress the resource allocation indication field of the PRB in the DCI sent to the terminal each time, thereby reducing the number of bits allocated by the base station to the DCI. Summary of the Invention

[0005] The present disclosure provides a method, device, and readable storage medium for transmitting downlink control information. The technical solution is as follows:

[0006] According to a first aspect of an embodiment of the present disclosure, a method for sending downlink control information is provided, the method comprising:

[0007] Obtaining the number of transport blocks scheduled by downlink control information;

[0008] Determine whether to compress the information field in the downlink control information according to the number of the transmission blocks, and when compression is required, send the downlink control information according to the corresponding compression method.

[0009] Optionally, determining whether to compress the information field in the downlink control information according to the number of the transport blocks, and sending the downlink control information according to a corresponding compression method when compression is required, includes:

[0010] Acquire the amount of pre-compression information of the downlink control information according to the number of the transmission blocks;

[0011] Whether the information field in the downlink control information needs to be compressed, and the compression method when compression is required, are determined based on the size relationship between the information amount before compression and the information amount threshold.

[0012] Optionally, the acquiring, according to the number of the transport blocks, the amount of pre-compression information of the downlink control information includes:

[0013] Obtaining the number of bits of the shared information field of the transport block before compression and the number of bits of the non-shared information field of the transport block before compression;

[0014] Obtaining a product of the number of bits of the non-shared information field before compression and the number of the transport blocks;

[0015] The sum of the number of bits of the shared information field before compression and the product is the amount of information of the downlink control information before compression.

[0016] Optionally, the shared information field includes a physical resource block (PRB) field and / or a modulation and coding scheme (MCS) field.

[0017] Optionally, the compression method is used to indicate a compression strategy for the information field in the downlink control information.

[0018] Optionally, the compression strategy includes at least one of the following strategies:

[0019] compressing the PRB field in the downlink control information; and

[0020] The MCS field in the downlink control information is compressed.

[0021] Optionally, compressing the PRB indication field in the downlink control information includes:

[0022] Limiting the resource allocation amount indicated by the PRB field;

[0023] Alternatively, limiting the resource allocation position indicated by the PRB field;

[0024] Alternatively, the resource allocation amount indicated by the PRB field and the resource allocation position indicated by the PRB field are limited.

[0025] Optionally, compressing the MCS field in the downlink control information includes:

[0026] Limiting the MCS indicated by the MCS field to a fixed MCS;

[0027] Alternatively, the MCS indicated by the MCS field is limited to at least two specified MCSs, where the at least two MCSs are part of the MCSs supported by the system;

[0028] Alternatively, the MCS indicated by the MCS field is limited to at least two MCSs extracted from various MCSs supported by the system according to a specified extraction method.

[0029] Optionally, the specified extraction method includes uniform extraction or non-uniform extraction.

[0030] According to a second aspect of an embodiment of the present disclosure, a device for sending downlink control information is provided, the device including:

[0031] A quantity acquisition module, configured to acquire the number of transmission blocks scheduled by downlink control information;

[0032] The information sending module is used to determine whether to compress the information field in the downlink control information according to the number of the transmission blocks, and when compression is required, send the downlink control information according to the corresponding compression method.

[0033] Optionally, the information sending module includes: an information quantity acquisition submodule and a compression mode determination submodule;

[0034] The information amount acquisition submodule is used to obtain the pre-compression information amount of the downlink control information according to the number of the transmission blocks;

[0035] The compression mode determination submodule is used to determine the compression mode according to the size relationship between the amount of information before compression and the information amount threshold.

[0036] Optionally, the information acquisition submodule includes: a first acquisition unit and a second acquisition unit;

[0037] The first acquiring unit is configured to acquire the number of bits of the shared information field of the transport block before compression, and the number of bits of the non-shared information field of the transport block before compression;

[0038] The second acquiring unit is configured to acquire a product of the number of bits of the non-shared information field before compression and the number of the transport blocks;

[0039] The sum of the number of bits of the shared information field before compression and the product is the amount of information of the downlink control information before compression.

[0040] Optionally, the shared information field includes a physical resource block (PRB) field and / or a modulation and coding scheme (MCS) field.

[0041] Optionally, the compression method is used to indicate a compression strategy for the information field in the downlink control information.

[0042] Optionally, the compression strategy includes at least one of the following strategies:

[0043] compressing the PRB field in the downlink control information; and

[0044] The MCS field in the downlink control information is compressed.

[0045] Optionally, compressing the PRB indication field in the downlink control information includes:

[0046] Limiting the resource allocation amount indicated by the PRB field;

[0047] Alternatively, limiting the resource allocation position indicated by the PRB field;

[0048] Alternatively, the resource allocation amount indicated by the PRB field and the resource allocation position indicated by the PRB field are limited.

[0049] Optionally, compressing the MCS field in the downlink control information includes:

[0050] Limiting the MCS indicated by the MCS field to a fixed MCS;

[0051] Alternatively, the MCS indicated by the MCS field is limited to at least two specified MCSs, where the at least two MCSs are part of the MCSs supported by the system;

[0052] Alternatively, the MCS indicated by the MCS field is limited to at least two MCSs extracted from various MCSs supported by the system according to a specified extraction method.

[0053] Optionally, the specified extraction method includes uniform extraction or non-uniform extraction.

[0054] According to a third aspect of an embodiment of the present disclosure, a device for sending downlink control information is provided, the device including:

[0055] processor;

[0056] a memory for storing executable instructions for the processor;

[0057] Wherein, the processor is configured to:

[0058] Obtaining the number of transport blocks scheduled by downlink control information;

[0059] Determine whether to compress the information field in the downlink control information according to the number of the transmission blocks, and when compression is required, send the downlink control information according to the corresponding compression method.

[0060] According to the fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, which contains executable instructions. The processor in the base station calls the executable instructions to implement the downlink control information sending method described in the above-mentioned first aspect or any optional implementation method of the first aspect.

[0061] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0062] The base station obtains the number of transport blocks scheduled for downlink control information; determines whether to compress the information field in the downlink control information based on the number of transport blocks; and, when compression is required, sends the downlink control information according to the corresponding compression method. The present disclosure obtains the number of transport blocks scheduled for downlink control information by the base station, thereby obtaining a compression method corresponding to the number of transport blocks, and compresses the sent downlink control information to a corresponding degree according to the compression method. This allows the base station to flexibly adjust the compression level of the downlink control information based on the number of transport blocks, thereby improving the flexibility of scheduling the downlink control information transport blocks while limiting the number of bits of the downlink control information.

[0063] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0065] Figure 1 is a structural diagram of a wireless communication system provided by an embodiment of the present disclosure;

[0066] Figure 2 is a schematic diagram of the correspondence between a narrowband and a PRB involved in an embodiment of the present disclosure;

[0067] Figure 3 FIG1 is a schematic diagram of an MPDCCH continuously scheduling multiple MPDSCHs according to an embodiment of the present disclosure;

[0068] Figure 4 This is a method flow chart of a method for sending downlink control information provided by an embodiment of the present disclosure;

[0069] Figure 5This is a method flow chart of a method for sending downlink control information provided by an embodiment of the present disclosure;

[0070] Figure 6 is a block diagram of a device for sending downlink control information according to an exemplary embodiment;

[0071] Figure 7 The figure is a schematic structural diagram of a base station according to an exemplary embodiment. DETAILED DESCRIPTION

[0072] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0073] It should be understood that the "several" mentioned in this article refers to one or more, and "multiple" refers to two or more. "And / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. For ease of understanding, the following is a brief introduction to some application scenarios involved in this disclosure.

[0074] Please refer to Figure 1 , which shows a schematic structural diagram of a wireless communication system provided by an embodiment of the present disclosure. Figure 1 As shown, the wireless communication system is a communication system based on cellular mobile communication technology, and the wireless communication system may include: several terminals 110 and several base stations 120.

[0075] Terminal 110 may refer to a device that provides voice and / or data connectivity to a user. Terminal 110 may communicate with one or more core networks via a Radio Access Network (RAN). Terminal 110 may be an IoT terminal, such as a sensor device, a mobile phone (or "cellular" phone), and a computer with an IoT terminal. For example, the terminal may be a fixed, portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted device. For example, a station (STA), subscriber unit, subscriber station, mobile station, mobile, remote station, access point, remote terminal, access terminal, user terminal, user agent, user device, or user equipment (UE). Alternatively, terminal 110 may be a device on an unmanned aerial vehicle, a vehicle-mounted device, or the like.

[0076] Base station 120 may be a network-side device in a wireless communication system. The wireless communication system may be a fourth-generation mobile communication technology (4G) system, also known as a long-term evolution (LTE) system; or a 5G system, also known as a new radio (NR) system. Alternatively, the wireless communication system may be a next-generation system of the 5G system.

[0077] Among them, the base station 120 can be an evolved base station (eNB) adopted in a 4G system. Alternatively, the base station 120 can also be a base station (gNB) adopting a centralized distributed architecture in a 5G system. When the base station 120 adopts a centralized distributed architecture, it usually includes a centralized unit (CU) and at least two distributed units (DU). The centralized unit is provided with a protocol stack of a packet data convergence protocol (PDCP) layer, a radio link layer control protocol (RLC) layer, and a media access control (MAC) layer; the distributed unit is provided with a physical (PHY) layer protocol stack. The embodiment of the present disclosure does not limit the specific implementation method of the base station 120.

[0078] A wireless connection can be established between the base station 120 and the terminal 110 via a wireless air interface. In different implementations, the wireless air interface is a wireless air interface based on the fourth generation mobile communication network technology (4G) standard; or, the wireless air interface is a wireless air interface based on the fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; or, the wireless air interface can also be a wireless air interface based on the next generation mobile communication network technology standard of 5G.

[0079] Optionally, the wireless communication system may further include a network management device 130 .

[0080] Several base stations 120 are respectively connected to a network management device 130. The network management device 130 may be a core network device in a wireless communication system. For example, the network management device 130 may be a mobility management entity (MME) in an evolved packet core (EPC). Alternatively, the network management device may be other core network devices, such as a serving gateway (SGW), a public data network gateway (PGW), a policy and charging rules function (PCRF), or a home subscriber server (HSS). The embodiments of the present disclosure do not limit the implementation form of the network management device 130.

[0081] In one possible implementation, in the communication system, terminals 110 may transmit MTC-type data to each other. Typically, for MTC-type data, the terminal may support a communication bandwidth of 6 PRBs. Furthermore, in Release 13, the entire system communication bandwidth is divided into multiple narrowbands (NBs), enabling the terminal to support narrowband communication.

[0082] Please refer to Figure 2 , which shows a schematic diagram of the correspondence between a narrowband and a PRB involved in an embodiment of the present disclosure. Figure 2 As shown, it includes the first narrowband 201, the first PRB resource 202, and the PRB resource number (1-6) corresponding to each narrowband, which is represented by Figure 2 It can be seen that one narrowband can correspond to 6 PRBs. Figure 2 In the narrowband communication mode shown, the base station can first allocate one of the multiple narrowbands to the terminal that needs to transmit MTC type data, and further allocate corresponding PRB resources in the allocated narrowband. When the terminal needs to transmit MTC type data, it can transmit the MTC type data on the PRB resources allocated by the base station. For example, the base station can instruct the terminal to transmit MTC type data in the above Figure 2 The terminal starts transmitting MTC-type data at the position of the first PRB resource 202 in the first narrowband 201 in the base station. When the terminal needs to transmit MTC-type data, it can start transmitting from the position of the first PRB resource 202 in the first narrowband 201 allocated by the base station. Optionally, the base station can reuse the LTE (Long Term Evolution) uplink type 0 allocation method for allocating PRB resources in the narrowband, that is, it can indicate the starting point of the PRB resources and the corresponding allocated PRB resource amount. For example, it instructs the terminal to start transmitting data from the position of the first PRB resource 202 and continue for 8 PRB resources.

[0083] Optional, for the above Figure 2 The narrowband allocation diagram shown is a case where one narrowband corresponds to 6 PRB resources. In MTC Coverage Enhancement mode A (CE mode A), when the base station indicates the starting position of the PRB resources of the terminal and the corresponding allocated PRB resources, it is necessary to use 5 bits (bits) for indication. Among them, the base station's narrowband indication in the above resource allocation and the PRB resource allocation indication within the narrowband are both carried by the content of DCI. Please refer to Table 1, which contains a mapping relationship between the 5-bit information carried in a DCI indication information involved in an embodiment of the present disclosure and a specific PRB resource allocation method.

[0084]

[0085]

[0086] Table 1

[0087] In one possible implementation, similar to the terminals in traditional LTE, terminals that transmit MTC type data may also support different modulation and demodulation schemes to cope with different channel scenarios. In addition to using 5 bits in the DCI to indicate the starting position of the terminal's PRB resources and the corresponding allocated PRB resource amount, the base station also needs to use 4 bits to indicate the terminal's modulation and demodulation scheme when transmitting MTC type data. For example, in MTC CE mode A, the terminal supports 16 modulation and demodulation schemes in the protocol, and the base station needs to use 4 bits in the DCI to indicate which modulation and demodulation scheme the terminal uses to transmit data. Please refer to Table 2, which shows the mapping relationship between the 4-bit information used in a DCI indication information involved in an embodiment of the present disclosure and the MCS scheme.

[0088]

[0089]

[0090] Table 2

[0091] As shown in Table 2, I MCS : represents the number of the modulation and coding mode; TBS : indicates the number of the transport block size; N PRB : Indicates the number of physical resource blocks. The terminal can determine the corresponding modulation and demodulation scheme based on the 4-bit information corresponding to the MCS contained in the DCI sent by the base station. For example, I MCS is 3, N PRB The number 40 in the table is 1, which means that the base station allocates 1 PRB to the terminal and instructs the terminal to use the modulation and demodulation mode numbered 3 for modulation and demodulation. The number 40 in the table means that the size of the transport block is 40 bits.

[0092] That is, the base station can carry a 5-bit narrowband PRB resource allocation indication and a 4-bit modulation and demodulation scheme indication information in the DCI sent to the terminal, thereby informing the terminal to transmit MTC type data on the corresponding PRB resources according to the indicated modulation and demodulation scheme.

[0093] Optionally, during the transmission of MTC type data, the base station can continuously schedule multiple MPDSCHs (MTCphysical downlink shared channel) or MPUSCHs (MTCphysicaluplink shared channel) on one MPDCCH (MTCphysicaldownlinkcontrolchannel). In other words, the DCI sent by the base station to the terminal can continuously schedule multiple uplink data blocks (TB) or downlink data blocks. Please refer to Figure 3 , which shows a schematic diagram of an MPDCCH continuously scheduling multiple MPDSCHs according to an embodiment of the present disclosure. Figure 3 As shown in Figure 1, one MPDCCH schedules four MPDSCHs consecutively. That is, when the base station sends a DCI in one MPDCCH, it can schedule the downlink TBs contained in each of the four MPDSCHs. Optionally, in MTC CE mode A, a DCI sent by the base station can schedule up to eight uplink or downlink TBs. Figure 3 In this scenario, one MPDCCH can also continuously schedule eight MPUSCHs or eight MPDSCHs.

[0094] In implementations where a DCI sent by a base station can schedule multiple TBs, the shared information field in the DCI can be shared by multiple TBs. For example, the shared information field in the DCI, which indicates the resource allocation mode, modulation and demodulation mode, and number of repeated transmissions, can be the same across multiple TBs scheduled by the DCI. That is, different TBs are transmitted using the same resource allocation mode, modulation and demodulation mode, and number of repeated transmissions. The base station only needs one corresponding shared information field in the DCI sent to schedule each TB. Optionally, the DCI sent by the base station may also contain non-shared information fields. For example, when the DCI indicates the new data indicator (NDI) and the redundancy version (RV), a corresponding information field (referred to as the non-shared information field in this disclosure) is reserved for each TB to separately indicate the corresponding channel coding for the NDI and RV transmissions. Optionally, in MTC CE mode A, the base station may reserve 8 bits for each NDI and RV in the DCI for transmission, and these reserved 8 bits are also carried in the DCI. For example, when an NDI needs to occupy 1 bit of information and an RV needs to occupy 1 bit of information, the base station needs to allocate an additional 16 bits of information to carry the information fields of the NDI and RV.

[0095] In the related art, in order to avoid an excessive increase in the number of bits allocated by the base station for a single DCI when one DCI schedules multiple TBs, the shared information field in the DCI can be compressed, thereby reducing the number of bits allocated by the base station for the DCI. For example, the narrowband PRB allocation method in the resource allocation field allocated by the base station is restricted, thereby compressing the 5-bit information indicating the PRB resources, and the allocation method of the MCS allocated by the base station is restricted, thereby compressing the 4-bit information indicating the MCS method, thereby reducing the number of bits contained in the DCI. In the related art, when compressing the PRB field and MCS field contained in the DCI, the shared information field of the DCI is compressed to the same degree in any case. For example, the 5-bit information indicating the PRB resources is compressed to 0 bit, and the 4-bit information indicating the MCS method is compressed to 1 bit, etc.

[0096] When the number of TBs scheduled in the DCI is 8, the number of bits required for the NDI and RV contained in the DCI is 16 bits. At this time, the actual increased bit overhead of the entire DCI is 8 bits. At this time, compressing the shared information field in the DCI according to the above compression method can achieve the effect of reducing the number of bits contained in the DCI. However, since the number of bits required for NDI and RV is related to the actual number of TBs scheduled, for example, when only 2 TBs are scheduled in the DCI, the actual number of bits required for NDI and RV is 4 bits. The 8 bits added by the DCI can fully characterize the NDI and RV of each TB, and there is no need to compress the shared information field. If the shared information field is still compressed, the PRB resource location used by the terminal when transmitting the TB or the MCS scheme used will be reduced, affecting the flexibility of the terminal in transmitting data.

[0097] In order to solve the problems existing in the above-mentioned related technologies, the present disclosure provides a method for sending downlink control information without losing the flexibility of terminal data transmission under the condition of compressing the number of DCI bits. Figure 4 , which shows a method flow chart of a method for sending downlink control information provided by an embodiment of the present disclosure, which can be applied to Figure 1 In the wireless communication system shown in FIG, the base station in the system performs the following operations: Figure 4 As shown, the method may include the following steps.

[0098] In step 401, the base station obtains the number of transport blocks scheduled by downlink control information.

[0099] In step 402, the base station determines whether to compress the information field in the downlink control information according to the number of transport blocks, and when compression is required, sends the downlink control information according to the corresponding compression method.

[0100] Optionally, the determining whether to compress the information field in the downlink control information according to the number of transport blocks, and when compression is required, sending the downlink control information according to a corresponding compression method, includes:

[0101] Obtaining the amount of pre-compression information of the downlink control information according to the number of transmission blocks;

[0102] Whether the information field in the downlink control information needs to be compressed, and the compression method when compression is required, are determined based on the size relationship between the information volume before compression and the information volume threshold.

[0103] Optionally, the obtaining of the amount of pre-compression information of the downlink control information according to the number of transport blocks includes:

[0104] Obtaining the number of bits of the shared information field of the transport block before compression and the number of bits of the non-shared information field of the transport block before compression;

[0105] Obtaining a product of the number of pre-compression bits of the non-shared information field and the number of transport blocks;

[0106] The sum of the number of bits before compression and the product of the shared information field is the amount of information before compression of the downlink control information.

[0107] Optionally, the shared information field includes a physical resource block (PRB) field and / or a modulation and coding scheme (MCS) field.

[0108] Optionally, the above compression method is used to indicate a compression strategy for the information field in the downlink control information.

[0109] Optionally, the compression strategy includes at least one of the following strategies:

[0110] compressing the PRB field in the downlink control information; and

[0111] Compress the MCS field in the downlink control information.

[0112] Optionally, the compressing the PRB indication field in the downlink control information includes:

[0113] Limit the resource allocation amount indicated by the PRB field;

[0114] Alternatively, the resource allocation location indicated by the PRB field is restricted;

[0115] Alternatively, the resource allocation amount and the resource allocation position indicated by the PRB field are limited.

[0116] Optionally, the compressing the MCS field in the downlink control information includes:

[0117] Limit the MCS indicated by the MCS field to a fixed MCS;

[0118] Alternatively, the MCS indicated by the MCS field is limited to at least two specified MCSs, where the at least two MCSs are part of the MCSs supported by the system;

[0119] Alternatively, the MCS indicated by the MCS field is limited to at least two MCSs extracted from various MCSs supported by the system according to a specified extraction method.

[0120] Optionally, the above-mentioned specified extraction method includes uniform extraction or non-uniform extraction.

[0121] In summary, the base station obtains the number of transmission blocks scheduled for downlink control information; determines whether to compress the information field in the downlink control information based on the number of transmission blocks, and when compression is required, sends the downlink control information according to the corresponding compression method. The present disclosure obtains the number of transmission blocks scheduled for downlink control information by the base station, thereby obtaining a compression method corresponding to the number of transmission blocks, and compresses the sent downlink control information to a corresponding degree according to the compression method, so that the base station can flexibly adjust the compression degree of the downlink control information based on the number of transmission blocks, thereby improving the flexibility of scheduling transmission blocks for the downlink control information while limiting the number of bits of the downlink control information, and expanding the application scenarios of compressed downlink control information.

[0122] Figure 5 FIG. 1 is a flow chart of a method for sending downlink control information according to an exemplary embodiment. Figure 5 As shown, the downlink control information sending method can be applied to Figure 1 In the wireless communication system shown, and executed by a base station in the system, the method may include the following steps.

[0123] In step 501, the base station obtains the number of transport blocks scheduled by downlink control information.

[0124] In a wireless communication system, when a terminal sends data through a wireless cellular network, it often obtains the time-frequency resource location of the data to be sent and the MCS method used when sending the data from the DCI signaling sent by the base station. For example, when the terminal needs to send MTC-type data, it can receive the DCI sent by the base station and obtain the PRB resource location and MCS allocated by the base station based on the indication information carried in the DCI. When generating the DCI to be sent, the base station can first obtain the number of TBs that the DCI needs to schedule (for example, when a DCI needs to schedule 4 TBs, the number of TBs scheduled in the DCI obtained by the base station is 4), thereby allocating the corresponding number of bits to the DCI to be sent to meet the amount of information required by the DCI to indicate the resource sending location and MCS of each scheduled TB.

[0125] In step 502, the base station obtains the amount of pre-compression information of the downlink control information according to the number of transport blocks.

[0126] Optionally, when generating a DCI, the base station may allocate a fixed number of bits to the shared information field contained therein. Optionally, the shared information field may include a physical resource block (PRB) field and / or a modulation and coding scheme (MCS) field. For example, in the above-mentioned physical resource block (PRB) field, the base station may allocate 5 bits of information to the PRB field, that is, use 5 bits of information to indicate the PRB field contained in the DCI; in the above-mentioned modulation and coding scheme (MCS) field, the base station may allocate 4 bits of information to the MCS field, that is, use 4 bits of information to indicate the MCS field contained in the DCI.

[0127] Optionally, when generating a DCI, the base station can calculate the number of bits allocated to the non-shared information field contained therein by the number of TBs. Optionally, the non-shared information field may include an NDI field and an RV field. For example, in each TB scheduled by the DCI, the number of bits before compression corresponding to the NDI field and the RV field of each TB is 1 bit. Then, when the number of TBs scheduled by the DCI is N (N is an integer greater than 1), the number of bits required for the non-shared information field in the DCI is 2N bits. The base station can allocate 2N bits of information to the non-shared information field contained in the DCI.

[0128] Optionally, the base station can obtain the number of bits before compression of the shared information field of the transmission block, and the number of bits before compression of the non-shared information field of the transmission block. Optionally, taking the example that the number of bits allocated for the above-mentioned shared information field is fixed and the number of bits allocated for the non-shared information field is related to the number of TBs scheduled in the actual DCI, when the base station allocates 5 bits of information for the PRB field in the shared information field, that is, 5 bits of information are used to indicate the PRB field contained in the DCI; when the base station allocates 4 bits of information for the MCS field in the shared information field, that is, 4 bits of information are used to indicate the MCS field contained in the DCI. Then the number of bits before compression of the shared information field obtained by the base station is 9 bits. Optionally, taking the example that the number of bits before compression corresponding to the NDI field and the RV field of each TB mentioned above are both 1 bit, then the number of bits before compression of the non-shared information field obtained by the base station is 2 bits.

[0129] Optionally, the base station may obtain the product of the number of bits in the non-shared information field before compression and the number of transport blocks based on the number of transport blocks obtained. In other words, the base station calculates the actual number of bits required for the non-shared information field in the DCI. For example, when the number of TBs scheduled by the DCI obtained by the base station is N, the actual number of bits required for the non-shared information field in the DCI is 2N bits.

[0130] Optionally, the base station may obtain the sum of the number of pre-compression bits of the non-shared information field and the product as the pre-compression information amount of the downlink control information. That is, the sum of the number of pre-compression bits of the shared information field obtained by the base station and the obtained product is the pre-compression information amount of the downlink control information. Taking the example of the pre-compression number of bits of the non-shared information field obtained above being 9 bits and the actual required number of bits of the non-shared information field being 2N bits, the pre-compression information amount of the downlink control information obtained by the base station is (9+2N) bits.

[0131] In step 503, the base station determines whether the information field in the downlink control information needs to be compressed, and the compression method when compression is required, based on the relationship between the amount of information before compression and the information amount threshold.

[0132] Optionally, the information amount threshold may be a fixed amount of information allocated by the base station to the DCI when generating the DCI. That is, no matter how many TBs the DCI schedules, the amount of information allocated by the base station to the DCI is equal to the information amount threshold. For example, in one possible implementation, the amount of information allocated by the base station to the DCI for the PRB domain, MCS domain, NDI domain, and RV domain is a total of Mbit (M is an integer greater than or equal to 16). No matter how many TBs the DCI schedules, the DCI carries Mbit of information to indicate the PRB domain, MCS domain, NDI domain, and RV domain, respectively.

[0133] The base station can compare the amount of information obtained before compression with the information amount threshold. When the amount of information before compression is greater than the information amount threshold, it is determined that the shared information field in the DCI needs to be compressed; when the amount of information before compression is not greater than the information amount threshold, it is determined that the shared information field in the DCI does not need to be compressed. Taking the amount of information before compression of the downlink control information obtained by the above-mentioned base station as (9+2N) bits as an example, when (9+2N)>M, the shared information field in the DCI needs to be compressed. Otherwise, the shared information field in the DCI does not need to be compressed. Among them, when the base station compresses the shared information field in the DCI, the compressed information amount of the downlink control information is no more than M.

[0134] Optionally, the compression method may be used to indicate a compression strategy for the information field in the downlink control information. That is, the compression method may also indicate compression of part or all of the information field in the shared information field in the downlink control information. Optionally, the compression strategy includes at least one of the following strategies: compressing the PRB field in the downlink control information; and compressing the MCS field in the downlink control information.

[0135] In one possible implementation method, the example of the amount of information before compression of the downlink control information obtained by the base station is (9+2N) bits, where the base station allocates 5 bits of information to the PRB domain and 4 bits of information to the MCS domain. When (9+2N)>M, the base station can compress the 5 bits of information allocated to the PRB domain in the DCI, or the base station can compress the 4 bits of information allocated to the MCS domain in the DCI, or the base station can compress both the PRB domain and the MCS domain in the DCI.

[0136] Taking M=16 as an example, that is, the base station has a total of 16 bits of information for the PRB field, MCS field, NDI field, and RV field in the DCI. When the amount of information in the PRB field obtained by the base station before compression is 5 bits, the amount of information in the MCS field before compression is 4 bits, the amount of information in the NDI field is 1 bit, and the amount of information in the RV field is 1 bit, the base station obtains the actual required amount of information for the NDI field and the RV field according to the number of TBs N scheduled by the DCI as 2N. At this time, the compression strategy adopted by the base station can refer to Table 3 below. Please refer to Table 3, which shows a compression schematic result of a base station executing a corresponding compression strategy involved in an embodiment of the present disclosure.

[0137]

[0138]

[0139] Table 3

[0140] As shown in Table 3, when N is less than 4, the amount of pre-compression information of the downlink control information obtained by the base station is less than 16 bits, so there is no need to compress the information field in the DCI. When N is greater than or equal to 4, the amount of pre-compression information of the downlink control information obtained by the base station is greater than 16 bits. At this time, the base station needs to compress the information field in the DCI. As shown in Table 3, the base station can select the compression method corresponding to the number of TBs to compress the shared information field in the DCI. For example, as can be seen from Table 3, when the number of TBs is 4, the base station can compress the 5 bits of the PRB field to 4 bits (that is, change the amount of information to 4 bits in the DCI to indicate the PRB field), so that the number of bits allocated by the base station for the DCI is no more than the information amount threshold of 16 bits. In one possible implementation method, when the number of TBs is 4, the base station can also compress the 4 bits of the MCS field to 3 bits, and not compress the 5 bits of the PRB field, etc., which can also achieve the effect of not more than the information amount threshold of 16 bits. The present disclosure does not limit the specific compression strategy.

[0141] Please refer to Table 4, which shows a schematic compression result of a base station involved in an embodiment of the present disclosure executing a corresponding compression strategy.

[0142]

[0143]

[0144] Table 4

[0145] As shown in Table 4, when the number of TBs is between 4 and 6, the base station can compress the 5 bits of the PRB field in the DCI to 2 bits and the 4 bits of the MCS field to 2 bits. When the number of TBs is 7 or 8, the base station can compress the 5 bits of the PRB field in the DCI to 0 bits and the 4 bits of the MCS field to 0 bits. In one possible implementation, when compression of the information field in the DCI is required, the base station can also adopt a single compression strategy. For example, when the number of TBs is greater than 4, the base station can compress the 5 bits of the PRB field in the DCI to 0 bits and the 4 bits of the MCS field to 0 bits. It should be noted that when the base station compresses the 5 bits of the PRB field in the DCI to 0 bits and the 4 bits of the MCS field to 0 bits, the base station does not indicate the specific PRB resources and MCS mode to the terminal in the DCI, and the terminal directly uses the default PRB resources and MCS mode to transmit MTC data.

[0146] Optionally, the base station compresses the PRB indication field in the downlink control information, which may include: limiting the resource allocation amount indicated by the PRB field. In one possible implementation, when compressing the PRB field, the base station limits the resource allocation amount indicated by the PRB field to the resource allocation of 6 PRBs, which is equivalent to all PRB resources in a narrowband. No additional bits are required for the PRB field indication. In MTC CE mode A, 5 bits of information can be directly compressed, that is, the DCI can carry 5 fewer bits of information.

[0147] In one possible implementation, when compressing the PRB field, the base station limits the resource allocation indicated by the PRB field to resource allocation of 6 PRBs or resource allocation of 4 PRBs. In this case, the base station can use 2 bits to indicate the PRB field. In MTC CE mode A, 3 bits of information can be directly compressed, that is, the DCI can carry 3 fewer bits of information. Please refer to Table 5, which shows the mapping relationship between the 3 bits of information carried in a DCI indication information and the specific PRB resource allocation method involved in the embodiment of the present disclosure.

[0148]

[0149] Table 5

[0150] As shown in Table 5, the base station can use 2 bits to indicate the PRB region in the DCI.

[0151] Optionally, when the base station compresses the PRB indication field in the downlink control information, it can also limit the resource allocation position indicated by the PRB field. In one possible implementation method, when the base station compresses the PRB field, it can limit the resource allocation amount indicated by the PRB field to correspond to one allocation resource position. For example, the allocation resource position corresponding to 4 PRB resource allocation amounts is (3, 4, 5, 6), that is, when the resource allocation amount of the PRB field in the DCI is 4, it indicates that the terminal can transmit data at the resource position (3, 4, 5, 6) in a narrowband. At this time, the base station can use 3 bits to indicate the PRB field. In the MTC CE mode A mode, 2 bits of information can be directly compressed, that is, the DCI can carry 2 bits less information. Please refer to Table 6, which shows the mapping relationship between the 3 bits of information carried in a DCI indication information involved in an embodiment of the present disclosure and the specific PRB resource allocation method.

[0152]

[0153]

[0154] Table 6

[0155] Optionally, when the base station compresses the PRB indication field in the downlink control information, it can limit both the resource allocation amount indicated by the PRB field and the resource allocation position indicated by the PRB field. In one possible implementation, when the base station compresses the PRB field, it can limit the resource allocation amount indicated by the PRB field to 3, 4, 5, and 6 respectively, and for each resource allocation amount, the resource allocation position is also limited. Please refer to Table 7, which shows the mapping relationship between the 2-bit information carried in a DCI indication information involved in an embodiment of the present disclosure and a specific PRB resource allocation method.

[0156]

[0157] Table 7

[0158] As can be seen from Table 7, for the limited PRB allocation resource amount, there is a unique corresponding allocation resource position. At this time, the base station can also use 2 bits to indicate the PRB field. In MTC CE mode A, 3 bits of information can be directly compressed, that is, DCI can carry 3 fewer bits of information.

[0159] Optionally, the base station compresses the MCS field in the downlink control information, which may include: limiting the MCS indicated by the MCS field to a fixed MCS. In one possible implementation, when compressing the MCS field, the base station limits the MCS indicated by the MCS field to a fixed MCS. For example, the developer sets the fixed MCS to be I in Table 2 above. MCS For an MCS of 15, the base station may not need an additional bit to indicate the MCS domain when allocating the MCS domain. When the terminal does not indicate the MCS domain in the received DCI, it automatically selects I MCS The modulation and demodulation are performed in an MCS mode of 15. Therefore, in MTC CE mode A, 4 bits of information can be directly compressed, that is, DCI can carry 4 bits less of information.

[0160] Optionally, the base station compresses the MCS field in the downlink control information, and may also limit the MCS indicated by the MCS field to at least two specified MCSs, where the at least two MCSs are part of the MCSs supported by the system.

[0161] In one possible implementation, taking two specified MCSs as an example, when compressing the MCS field, the base station limits the MCS indicated by the MCS field to two specified fixed MCSs. For example, the developer sets the two fixed MCSs to be I and II in Table 2 above. MCSFor MCSs of 14 and 15, the base station only needs an additional 1 bit to indicate the MCS domain when allocating the MCS domain. Therefore, in MTC CE mode A, 3 bits of information can be directly compressed, that is, the DCI can carry 3 fewer bits of information. Please refer to Table 8, which shows the mapping relationship between the 1-bit information used in a DCI indication information and the MCS scheme involved in the embodiments of the present disclosure.

[0162]

[0163] Table 8

[0164] Optionally, when compressing the MCS field in the downlink control information, the base station may also limit the MCS indicated by the MCS field to at least two MCSs extracted from various MCSs supported by the system according to a specified extraction method. Optionally, the specified extraction method includes uniform extraction or non-uniform extraction. In one possible implementation, taking the example of the specified extraction method of uniformly extracting 4 MCSs, when compressing the MCS field, the base station limits the MCS indicated by the MCS field to the 4 fixed MCSs uniformly extracted. For example, the 4 fixed MCSs uniformly extracted are 1 in Table 2 above. MCS For MCSs of 3, 7, 11, and 15, the base station only needs an additional 2 bits to indicate the MCS domain when allocating the MCS domain. Therefore, in MTC CE mode A, the 2-bit information can be directly compressed, that is, the DCI can carry 2 fewer bits of information. Please refer to Table 9, which shows the mapping relationship between the 2-bit information used in a DCI indication information and the MCS scheme involved in the embodiments of the present disclosure.

[0165]

[0166] Table 9

[0167] In one possible implementation, taking the case where the designated extraction method is 4 MCSs extracted non-uniformly as an example, when the base station compresses the MCS field, it limits the MCS indicated by the MCS field to the 4 fixed MCSs extracted non-uniformly. For example, the 4 fixed MCSs extracted non-uniformly are 1 in Table 2 above. MCS For MCSs of 1, 7, 11, and 15, the base station only needs an additional 2 bits to indicate the MCS field when allocating the MCS field. Therefore, in MTC CE mode A, 2 bits of information can be directly compressed, that is, the DCI can carry 2 fewer bits of information. Please refer to Table 10, which shows the mapping relationship between the 2 bits of information used in a DCI indication information and the MCS scheme involved in the embodiments of the present disclosure.

[0168]

[0169] Table 10

[0170] In step 504, the base station sends the downlink control information based on whether to compress the information field in the downlink control information and the compression method when compression is required.

[0171] Optionally, the base station may determine whether to compress the information field in the downlink control information according to the number of transport blocks through the above steps. If compression is determined to be necessary, the base station may compress the information field in the DCI according to a compression method corresponding to the number of transport blocks scheduled in the DCI, and then send the compressed downlink control information to the terminal via the MPDCCH. If the base station determines that compression is not necessary for the information field in the downlink control information, the base station may also choose not to compress the information field in the DCI and directly send the downlink control information.

[0172] In summary, the base station obtains the number of transmission blocks scheduled for downlink control information; determines whether to compress the information field in the downlink control information based on the number of transmission blocks, and when compression is required, sends the downlink control information according to the corresponding compression method. The present disclosure obtains the number of transmission blocks scheduled for downlink control information by the base station, thereby obtaining a compression method corresponding to the number of transmission blocks, and compresses the sent downlink control information to a corresponding degree according to the compression method, so that the base station can flexibly adjust the compression degree of the downlink control information based on the number of transmission blocks, thereby improving the flexibility of scheduling transmission blocks for the downlink control information while limiting the number of bits of the downlink control information, and expanding the application scenarios of compressed downlink control information.

[0173] The following are embodiments of the apparatus disclosed herein, which can be used to implement the method embodiments disclosed herein. For details not disclosed in the apparatus embodiments disclosed herein, please refer to the method embodiments disclosed herein.

[0174] Figure 6 is a block diagram of a device for sending downlink control information according to an exemplary embodiment. Figure 6 As shown, the downlink control information sending device can be implemented by hardware or a combination of hardware and software. Figure 1 All or part of the base station in the implementation environment shown to perform Figure 4 or Figure 5 The steps performed by the base station in any of the illustrated embodiments. The downlink control information sending device may include:

[0175] The number acquisition module 601 is used to obtain the number of transport blocks scheduled by downlink control information;

[0176] The information sending module 602 is configured to determine whether to compress the information field in the downlink control information according to the number of the transmission blocks, and when compression is required, send the downlink control information according to a corresponding compression method.

[0177] Optionally, the information sending module 602 includes: an information amount acquisition submodule and a compression mode determination submodule;

[0178] The information amount acquisition submodule is used to obtain the pre-compression information amount of the downlink control information according to the number of the transmission blocks;

[0179] The compression mode determination submodule is used to determine the compression mode according to the size relationship between the amount of information before compression and the information amount threshold.

[0180] Optionally, the information acquisition submodule includes: a first acquisition unit and a second acquisition unit;

[0181] The first acquiring unit is configured to acquire the number of bits of the shared information field of the transport block before compression, and the number of bits of the non-shared information field of the transport block before compression;

[0182] The second acquiring unit is configured to acquire a product of the number of bits of the non-shared information field before compression and the number of the transport blocks;

[0183] The sum of the number of bits of the shared information field before compression and the product is the amount of information of the downlink control information before compression.

[0184] Optionally, the shared information field includes a physical resource block (PRB) field and / or a modulation and coding scheme (MCS) field.

[0185] Optionally, the compression method is used to indicate a compression strategy for the information field in the downlink control information.

[0186] Optionally, the compression strategy includes at least one of the following strategies:

[0187] compressing the PRB field in the downlink control information; and

[0188] The MCS field in the downlink control information is compressed.

[0189] Optionally, compressing the PRB indication field in the downlink control information includes:

[0190] Limiting the resource allocation amount indicated by the PRB field;

[0191] Alternatively, limiting the resource allocation position indicated by the PRB field;

[0192] Alternatively, the resource allocation amount indicated by the PRB field and the resource allocation position indicated by the PRB field are limited.

[0193] Optionally, compressing the MCS field in the downlink control information includes:

[0194] Limiting the MCS indicated by the MCS field to a fixed MCS;

[0195] Alternatively, the MCS indicated by the MCS field is limited to at least two specified MCSs, where the at least two MCSs are part of the MCSs supported by the system;

[0196] Alternatively, the MCS indicated by the MCS field is limited to at least two MCSs extracted from various MCSs supported by the system according to a specified extraction method.

[0197] Optionally, the specified extraction method includes uniform extraction or non-uniform extraction.

[0198] It should be noted that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0199] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0200] An exemplary embodiment of the present disclosure provides a downlink control information sending device capable of implementing the above-mentioned Figure 4 or Figure 5 In the illustrated embodiment, all or part of the steps performed by the base station, the downlink control information sending device includes: a processor, a memory for storing instructions executable by the processor;

[0201] Wherein, the processor is configured to:

[0202] Obtaining the number of transport blocks scheduled by downlink control information;

[0203] Determine whether to compress the information field in the downlink control information according to the number of the transmission blocks, and when compression is required, send the downlink control information according to the corresponding compression method.

[0204] Optionally, the determining, according to the number of the transport blocks, whether to compress the information field in the downlink control information, and when compression is required, sending the downlink control information according to a corresponding compression method, the processor is configured to:

[0205] Acquire the amount of pre-compression information of the downlink control information according to the number of the transmission blocks;

[0206] Whether the information field in the downlink control information needs to be compressed, and the compression method when compression is required, are determined based on the size relationship between the information amount before compression and the information amount threshold.

[0207] Optionally, the acquiring, according to the number of the transport blocks, the amount of information before compression of the downlink control information, the processor is configured to:

[0208] Obtaining the number of bits of the shared information field of the transport block before compression and the number of bits of the non-shared information field of the transport block before compression;

[0209] Obtaining a product of the number of bits of the non-shared information field before compression and the number of the transport blocks;

[0210] The sum of the number of bits of the shared information field before compression and the product is the amount of information of the downlink control information before compression.

[0211] Optionally, the shared information field includes a physical resource block (PRB) field and / or a modulation and coding scheme (MCS) field.

[0212] Optionally, the compression method is used to indicate a compression strategy for the information field in the downlink control information.

[0213] Optionally, the compression strategy includes at least one of the following strategies:

[0214] compressing the PRB field in the downlink control information; and

[0215] The MCS field in the downlink control information is compressed.

[0216] Optionally, compressing the PRB indication field in the downlink control information includes:

[0217] Limiting the resource allocation amount indicated by the PRB field;

[0218] Alternatively, limiting the resource allocation position indicated by the PRB field;

[0219] Alternatively, the resource allocation amount indicated by the PRB field and the resource allocation position indicated by the PRB field are limited.

[0220] Optionally, compressing the MCS field in the downlink control information includes:

[0221] Limiting the MCS indicated by the MCS field to a fixed MCS;

[0222] Alternatively, the MCS indicated by the MCS field is limited to at least two specified MCSs, where the at least two MCSs are part of the MCSs supported by the system;

[0223] Alternatively, the MCS indicated by the MCS field is limited to at least two MCSs extracted from various MCSs supported by the system according to a specified extraction method.

[0224] Optionally, the specified extraction method includes uniform extraction or non-uniform extraction.

[0225] The above mainly takes the base station as an example to introduce the solution provided by the embodiment of the present disclosure. It can be understood that in order to realize the above functions, the base station includes hardware structures and / or software modules corresponding to the execution of each function. In combination with the modules and algorithm steps of each example described in the embodiment disclosed in this disclosure, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner 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 to exceed the scope of the technical solution of the embodiment of the present disclosure.

[0226] Figure 7 The figure is a schematic structural diagram of a base station according to an exemplary embodiment.

[0227] The base station 700 includes a communication unit 704 and a processor 702. The processor 702 may also be a controller. Figure 7 The communication unit 704 is used to support the base station to communicate with other network devices (such as terminals, other base stations, gateways, etc.).

[0228] Furthermore, the base station 700 may further include a memory 703 , and the memory 703 is used to store program codes and data of the base station 700 .

[0229] It is understandable that Figure 7 Only a simplified design of the base station 700 is shown. In actual applications, the base station 700 may include any number of processors, controllers, memories, communication units, etc., and all terminals that can implement the embodiments of the present disclosure are within the scope of protection of the embodiments of the present disclosure.

[0230] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present disclosure can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0231] The embodiment of the present disclosure further provides a computer storage medium for storing computer software instructions used by the above-mentioned base station, which includes a program designed for executing the above-mentioned downlink control information sending method.

[0232] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0233] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for sending downlink control information, characterized in that: The method comprises: Obtaining the number of transport blocks scheduled by downlink control information; Determine whether to compress the shared information field in the downlink control information according to the number of the transmission blocks, and when compression is required, compress the shared information field before sending the downlink control information; the shared information field includes a modulation and coding scheme MCS field.

2. The method according to claim 1, characterized in that The determining, according to the number of the transport blocks, whether to compress the shared information field in the downlink control information, and when compression is required, compressing the shared information field before sending the downlink control information, includes: Acquire the amount of pre-compression information of the downlink control information according to the number of the transmission blocks; Whether the shared information field in the downlink control information needs to be compressed, and the compression method when compression is needed, are determined according to the size relationship between the information volume before compression and the information volume threshold.

3. The method according to claim 1 or 2, characterized in that The compression mode for compressing the shared information field is used to indicate a compression strategy for the shared information field in the downlink control information.

4. The method according to claim 3, characterized in that The compression strategy includes: The MCS field in the downlink control information is compressed.

5. The method according to claim 4, characterized in that The compressing the MCS field in the downlink control information includes: The MCS indicated by the MCS field is limited to at least two MCSs extracted from various MCSs supported by the system according to a specified extraction method.

6. The method according to claim 5, characterized in that The specified extraction method includes uniform extraction or non-uniform extraction.

7. The method according to claim 3, characterized in that The compression mode for compressing the shared information field is used to indicate compressing a part of the information field or the whole of the information field in the shared information field in the downlink control information.

8. The method according to claim 1, characterized in that The method further comprises: In response to the number of uplink data blocks scheduled by the downlink control information being greater than or equal to 4, it is determined that the shared information field in the downlink control information needs to be compressed.

9. A downlink control information sending device, characterized in that: The device comprises: A quantity acquisition module, configured to acquire the number of transmission blocks scheduled by downlink control information; An information sending module is used to determine whether to compress the shared information field in the downlink control information according to the number of the transmission blocks, and when compression is required, compress the shared information field and then send the downlink control information; the shared information field includes a modulation and coding scheme MCS field.

10. The device according to claim 9, characterized in that The information sending module includes: an information quantity acquisition submodule and a compression mode determination submodule; The information amount acquisition submodule is used to obtain the pre-compression information amount of the downlink control information according to the number of the transmission blocks; The compression mode determination submodule is used to determine whether the shared information field in the downlink control information needs to be compressed, and the compression mode when compression is required, based on the size relationship between the information amount before compression and the information amount threshold.

11. The device according to claim 9 or 10, characterized in that The compression mode for compressing the shared information field is used to indicate a compression strategy for the shared information field in the downlink control information.

12. The device according to claim 11, characterized in that The compression strategy includes: The MCS field in the downlink control information is compressed.

13. The device according to claim 12, characterized in that The compressing the MCS field in the downlink control information includes: The MCS indicated by the MCS field is limited to at least two MCSs extracted from various MCSs supported by the system according to a specified extraction method.

14. The device according to claim 13, characterized in that The specified extraction method includes uniform extraction or non-uniform extraction.

15. The device according to claim 11, characterized in that The compression mode for compressing the shared information field is used to indicate compressing a part of the information field or the whole of the information field in the shared information field in the downlink control information.

16. The device according to claim 9, characterized in that The information sending module includes: a compression mode determination submodule; The compression mode determination submodule is configured to determine that the shared information field in the downlink control information needs to be compressed in response to the number of uplink data blocks scheduled by the downlink control information being greater than or equal to 4.

17. A downlink control information sending device, characterized in that: The device comprises: processor; a memory for storing executable instructions for the processor; Wherein, the processor is configured to: Obtaining the number of transport blocks scheduled by downlink control information; Determine whether to compress the shared information field in the downlink control information according to the number of the transmission blocks, and when compression is required, compress the shared information field before sending the downlink control information; the shared information field includes a modulation and coding scheme MCS field.

18. A computer-readable storage medium, characterized in that The computer-readable storage medium includes executable instructions, and the processor in the base station calls the executable instructions to implement the downlink control information sending method according to any one of claims 1 to 8.

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