WO2020223960A1 - 下行控制信息发送方法、装置及可读存储介质 - Google Patents
下行控制信息发送方法、装置及可读存储介质 Download PDFInfo
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- WO2020223960A1 WO2020223960A1 PCT/CN2019/086195 CN2019086195W WO2020223960A1 WO 2020223960 A1 WO2020223960 A1 WO 2020223960A1 CN 2019086195 W CN2019086195 W CN 2019086195W WO 2020223960 A1 WO2020223960 A1 WO 2020223960A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present disclosure relates to the field of wireless communication technology, and in particular to a method, device and readable storage medium for sending downlink control information.
- a terminal when a terminal transmits MTC-type data, it needs to know in advance the resource location and the corresponding modulation and demodulation mode when transmitting the MTC-type data. This information can be pre-determined by the base station.
- the terminal is notified through Downlink Control Information (DCI).
- DCI Downlink Control Information
- the base station may send the generated physical resource block (PRB) to the terminal through DCI.
- PRB physical resource block
- the base station needs to allocate more bits in the DCI to express the PRB resource allocation indication field.
- the base station can usually compress the resource allocation indication field of the PRB in the DCI issued to the terminal each time, thereby reducing the number of bits allocated by the base station to the DCI.
- the present disclosure provides a method, device and readable storage medium for sending downlink control information.
- the technical solution is as follows:
- a method for sending downlink control information including:
- the determining whether to compress the information field in the downlink control information according to the number of transmission blocks, and when compression is needed, sending the downlink control information according to a corresponding compression mode includes:
- the obtaining the pre-compression information amount of the downlink control information according to the number of transmission blocks includes:
- the sum of the number of bits before compression of the shared information field and the product is the amount of information before compression of the downlink control information.
- the shared information field includes a physical resource block PRB field and/or a modulation and coding scheme (Modulation and Coding Scheme, MCS) field.
- MCS Modulation and Coding Scheme
- the compression mode is used to indicate a compression strategy for the information field in the downlink control information.
- the compression strategy includes at least one of the following strategies:
- the compressing the PRB indication field in the downlink control information includes:
- the resource allocation amount indicated by the PRB field and the resource allocation position indicated by the PRB field are restricted.
- the compressing the MCS field in the downlink control information includes:
- the MCS indicated by the MCS domain is restricted to at least two MCS extracted from each MCS supported by the system according to a specified extraction manner.
- the specified extraction method includes uniform extraction or non-uniform extraction.
- a device for sending downlink control information including:
- the quantity acquisition module is used to acquire the quantity of transmission blocks scheduled by the downlink control information
- the information sending module is configured to determine whether to compress the information field in the downlink control information according to the number of transmission blocks, and when compression is required, send the downlink control information according to a corresponding compression method.
- the information sending module includes: an information volume acquisition submodule and a compression mode determination submodule;
- the information volume acquisition submodule is configured to acquire the pre-compression information volume of the downlink control information according to the number of transmission blocks;
- the compression mode determining sub-module is configured to determine the compression mode according to the magnitude relationship between the amount of information before compression and an information amount threshold.
- the information volume acquiring submodule includes: a first acquiring unit and a second acquiring unit;
- the first obtaining unit is configured to 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;
- the second acquiring unit is configured to acquire the product of the number of bits before compression of the non-shared information field and the number of transmission blocks;
- the sum of the number of bits before compression of the shared information field and the product is the amount of information before compression of the downlink control information.
- the shared information field includes a physical resource block PRB field and/or a modulation and coding scheme MCS field.
- the compression mode is used to indicate a compression strategy for the information field in the downlink control information.
- the compression strategy includes at least one of the following strategies:
- the compressing the PRB indication field in the downlink control information includes:
- the resource allocation amount indicated by the PRB field and the resource allocation position indicated by the PRB field are restricted.
- the compressing the MCS field in the downlink control information includes:
- the MCS indicated by the MCS domain is restricted to at least two MCS extracted from each MCS supported by the system according to a specified extraction manner.
- the specified extraction method includes uniform extraction or non-uniform extraction.
- a device for sending downlink control information including:
- a memory for storing executable instructions of the processor
- the processor is configured to:
- a computer-readable storage medium contains executable instructions, and a processor in a base station invokes the executable instructions to implement the above-mentioned first aspect Or the downlink control information sending method described in any optional implementation of the first aspect.
- the base station obtains the number of transmission blocks scheduled by the downlink control information; and determines whether to compress the information field in the downlink control information according to the number of transmission blocks, and when compression is needed, sends the downlink control information according to the corresponding compression mode.
- the base station obtains the number of transmission blocks scheduled by the downlink control information, thereby obtaining a compression mode corresponding to the number of transmission blocks, and compresses the transmitted downlink control information to a corresponding degree according to the compression mode, so that the base station can according to the number of transmission blocks , Flexibly adjust the compression degree of the downlink control information, thereby increasing the flexibility of the downlink control information scheduling transmission block while limiting the number of bits of the downlink control information.
- FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present disclosure
- FIG. 2 is a schematic diagram of the correspondence between a narrowband and a PRB involved in an embodiment of the present disclosure
- FIG. 3 is a schematic diagram of an MPDCCH continuously scheduling multiple MPDSCHs according to an embodiment of the present disclosure
- FIG. 5 is a method flowchart of a method for sending downlink control information provided by an embodiment of the present disclosure
- Fig. 6 is a block diagram showing a device for sending downlink control information according to an exemplary embodiment
- Fig. 7 is a schematic structural diagram showing a base station according to an exemplary embodiment.
- FIG. 1 shows a schematic structural diagram of a wireless communication system provided by an embodiment of the present disclosure.
- 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.
- the terminal 110 may be a device that provides voice and/or data connectivity to the user.
- the terminal 110 can communicate with one or more core networks via a radio access network (RAN).
- RAN radio access network
- the terminal 110 can be an IoT terminal, such as a sensor device, a mobile phone (or “cellular” phone), and
- the computer of the Internet of Things terminal for example, may be a fixed, portable, pocket-sized, handheld, computer-built-in or vehicle-mounted device.
- station Station, STA
- subscriber unit subscriber unit
- subscriber station subscriber station
- mobile station mobile station
- mobile station mobile
- remote station remote station
- access point remote terminal
- access terminal access terminal
- user device user terminal
- user agent user agent
- user equipment user device
- user terminal user equipment
- UE user equipment
- the terminal 110 may also be a device of an unmanned aerial vehicle, a vehicle-mounted device, or the like.
- the base station 120 may be a network side device in a wireless communication system.
- the wireless communication system may be the 4th generation mobile communication (4G) system, also known as the Long Term Evolution (LTE) system; or, the wireless communication system may also be a 5G system, Also known as the new radio (NR) system.
- the wireless communication system may also be the next-generation system of the 5G system.
- the base station 120 may be an evolved base station (eNB) used in a 4G system.
- the base station 120 may also be a base station (gNB) adopting a centralized and distributed architecture in the 5G system.
- the base station 120 adopts a centralized and distributed architecture it usually includes a centralized unit (CU) and at least two distributed units (DU).
- the centralized unit is provided with a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, a radio link layer control protocol (Radio Link Control, RLC) layer, and a media access control (Media Access Control, MAC) layer.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC media access control
- the unit is provided with a physical (PHY) layer protocol stack, and the embodiment of the present disclosure does not limit the specific implementation of the base station 120.
- PHY physical
- a wireless connection can be established between the base station 120 and the terminal 110 through a wireless air interface.
- 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, such as The wireless air interface is a new air interface; or, the wireless air interface may also be a wireless air interface based on 5G-based next-generation mobile communication network technology standards.
- the foregoing wireless communication system may further include a network management device 130.
- the network management device 130 may be a core network device in a wireless communication system.
- the network management device 130 may be a mobility management entity (Mobility Management Entity) in an Evolved Packet Core (EPC) network. MME).
- the network management device may also be other core network devices, such as Serving GateWay (SGW), Public Data Network GateWay (PGW), Policy and Charging Rules function unit (Policy and Charging Rules). Function, PCRF) or Home Subscriber Server (HSS), etc.
- SGW Serving GateWay
- PGW Public Data Network GateWay
- Policy and Charging Rules function unit Policy and Charging Rules
- Function PCRF
- HSS Home Subscriber Server
- the terminals 110 can transmit MTC type data to each other.
- the terminal can support a communication bandwidth of 6 PRBs.
- the communication bandwidth of the entire system is divided into multiple narrowbands (NB), so that the terminal can support narrowband communication.
- FIG. 2 shows a schematic diagram of the correspondence between a narrowband and a PRB involved in an embodiment of the present disclosure.
- the base station can first allocate one of the multiple narrowbands to the terminal that needs to transmit MTC data, and further allocate the corresponding PRB resource in the allocated narrowband.
- MTC-type data can be transmitted on PRB resources allocated by the base station.
- the base station may instruct the terminal to start transmitting MTC type data at the position of the first PRB resource 202 in the first narrowband 201 in FIG. 2 above.
- the terminal may be allocated from the base station. Transmission starts at the position of the first PRB resource 202 in a narrowband 201.
- the base station can reuse the LTE (Long Term Evolution) uplink type 0 allocation method, that is, it can indicate the starting point of the PRB resources and the corresponding allocated amount of PRB resources.
- the terminal is instructed to start from the position of the first PRB resource 202, and data can be transmitted continuously for 8 PRB resources.
- LTE Long Term Evolution
- the base station indicates the PRB of the terminal The starting position of the resource and the amount of PRB resources allocated correspondingly need to be indicated by a 5-bit number (bit).
- the base station carries the content of the DCI for the narrowband indication and the PRB resource allocation indication in the narrowband.
- Table 1 contains a mapping relationship between the 5-bit information carried in the DCI indication information and the specific PRB resource allocation manner in the embodiment of the present disclosure.
- the terminal transmitting MTC type data can also support different modulation and demodulation schemes to deal with different channel scenarios.
- the base station needs to use 5 bits to indicate the starting position of the PRB resources of the terminal and the corresponding amount of PRB resources allocated, and 4 bits to indicate the modulation and demodulation scheme of the terminal when transmitting MTC type data.
- 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.
- Table 2 shows the mapping relationship between the 4-bit information used in the DCI indication information and the MCS scheme in an embodiment of the present disclosure.
- I MCS indicates the number of modulation and coding schemes
- I TBS indicates the number of transport block size
- N PRB indicates the number of physical resource blocks.
- the terminal can determine the corresponding modulation and demodulation scheme according to the 4-bit information corresponding to the MCS contained in the DCI sent by the base station.
- I MCS is 3
- N PRB is 1
- the number in the corresponding table is 40, which means that the number of PRBs allocated by the base station to the terminal is 1, and the terminal is instructed to use the modulation and demodulation method numbered 3 for modulation and decoding. Tune.
- the corresponding number 40 in the table indicates that the size of the transmission block is 40 bits.
- the DCI sent by the base station to the terminal can carry a 5-bit narrowband in-band PRB resource allocation indication and 4-bit modulation and demodulation scheme indication information, thereby informing the terminal to perform MTC on the corresponding PRB resource according to the indicated modulation and demodulation scheme.
- Type of data transmission
- the base station can continuously schedule multiple MPDSCHs (MTC physical downlink shared channel, MTC physical downlink shared channel) on one MPDCCH (MTC physical downlink control channel).
- MPUSCH MTC physical uplink shared channel, MTC physical uplink shared channel
- FIG. 3 shows a schematic diagram of an MPDCCH continuously scheduling multiple MPDSCHs according to an embodiment of the present disclosure.
- one MPDCCH continuously schedules 4 MPDSCHs, that is, when the base station sends one DCI in one MPDCCH, it can schedule the downlink TBs contained in each of the 4 MPDSCHs.
- MTC CE mode A at most 8 uplink or downlink TBs can be scheduled in one DCI sent by the base station. That is, in FIG. 3, one MPDCCH can also schedule 8 MPUSCHs or 8 MPDSCHs continuously.
- the DCI sent by the base station can schedule multiple TBs.
- the shared information field in the DCI can be shared by multiple TBs.
- the DCI indicates the resource allocation mode, modulation and demodulation mode, and the number of repeated transmissions. It may be the same in multiple TBs scheduled by the DCI. That is, different TBs use the same resource allocation method, modulation and demodulation method, and the number of repeated transmissions for transmission.
- the DCI sent by the base station only one corresponding shared information field is needed to complete the scheduling of each TB.
- the base station can reserve 8 bits for NDI and RV in DCI for transmission, and the reserved 8 bits are also carried in DCI. For example, when an NDI needs to occupy 1 bit of information, and an RV needs to occupy 1 bit of information, then the base station needs to allocate additional 16 bits of information to carry the NDI and RV information fields.
- the shared information field in the DCI can be compressed to reduce the number of bits allocated by the base station for the DCI. For example, restrict the PRB allocation mode in the narrowband in the resource allocation domain allocated by the base station, thereby compressing the 5-bit information indicating the PRB resource, and restricting the allocation mode of the MCS allocated by the base station, so as to perform the 4-bit information indicating the MCS mode. Compression, thereby reducing the number of bits contained in the DCI.
- the DCI shared information field is compressed to the same degree. For example, the 5-bit information indicating the PRB resource is compressed to 0 bit, and the 4-bit information indicating the MCS mode is compressed to 1 bit.
- the actual increase in bit overhead for the entire DCI is 8 bits.
- the shared information field in the DCI is The above compression method can achieve the effect of reducing the number of bits contained in DCI.
- 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 DCI, the actual The number of bits required for the required NDI and RV is 4 bits.
- the 8 bits added by DCI can completely characterize the NDI and RV of each TB. There is no need to compress the shared information domain. If the shared information domain is still compressed, then This will lead to a reduction in the location of PRB resources used by the terminal or the use of the MCS scheme when transmitting TB, which affects the flexibility of the terminal when transmitting data.
- the present disclosure provides a method for sending downlink control information.
- FIG. 4 shows a method flow chart of a method for sending downlink control information provided by an embodiment of the present disclosure.
- the method can be applied to the wireless communication system shown in FIG. 1 and executed by a base station in the system. As shown in Figure 4, the method can include the following steps.
- step 401 the base station obtains the number of transmission blocks scheduled by the downlink control information.
- the base station determines whether to compress the information field in the downlink control information according to the number of transmission blocks, and when compression is needed, sends the downlink control information according to the corresponding compression mode.
- the foregoing 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, including:
- the foregoing obtaining the pre-compression information amount of the downlink control information according to the number of transmission blocks includes:
- the sum of the number of bits before compression and the product of the shared information domain is the amount of information before compression of the downlink control information.
- the aforementioned shared information field includes a physical resource block PRB field and/or a modulation and coding scheme MCS field.
- the aforementioned compression method is used to indicate a compression strategy for the information field in the downlink control information.
- the aforementioned compression strategy includes at least one of the following strategies:
- the foregoing compressing the PRB indication field in the downlink control information includes:
- the foregoing compression of the MCS field in the downlink control information includes:
- the MCS indicated by the restricted MCS field is at least two MCS extracted from each MCS supported by the system according to a specified extraction method.
- the aforementioned specified extraction method includes uniform extraction or non-uniform extraction.
- the base station obtains the number of transmission blocks scheduled by the downlink control information; and determines whether to compress the information field in the downlink control information according to the number of transmission blocks, and when compression is needed, it sends the downlink according to the corresponding compression method. Control information.
- the base station obtains the number of transmission blocks scheduled by the downlink control information, thereby obtaining a compression mode corresponding to the number of transmission blocks, and compresses the transmitted downlink control information to a corresponding degree according to the compression mode, so that the base station can according to the number of transmission blocks , Flexibly adjust the degree of compression of the downlink control information, thereby increasing the flexibility of the downlink control information scheduling transmission block while limiting the number of bits of the downlink control information, and expanding the application scenarios of compressing the downlink control information.
- FIG. 5 is a method flowchart of a method for sending downlink control information according to an exemplary embodiment. As shown in FIG. 5, the method for sending downlink control information can be applied to the wireless communication system shown in FIG. Executed by the base station in the system, the method may include the following steps.
- step 501 the base station obtains the number of transmission blocks scheduled by the downlink control information.
- a terminal when a terminal sends data through a wireless cellular network, it often learns the time-frequency resource location of the sent data and the MCS method used when sending the data in the DCI signaling issued by the base station. For example, the terminal needs to perform When sending MTC-type data, it can receive the DCI issued by the base station, and obtain the PRB resource location and MCS allocated by the base station for itself according to the indication information carried in the DCI.
- the base station When the base station generates the DCI that needs to be issued, it 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) Therefore, a corresponding number of bits is allocated to the DCI to be issued, so as to satisfy the amount of information required by the DCI to indicate the resource transmission position of each TB scheduled therein and the MCS.
- the base station obtains the amount of information before compression of the downlink control information according to the number of transmission blocks.
- the number of bits allocated to the shared information field contained therein may be fixed.
- the shared information field may include a physical resource block PRB field and/or a modulation and coding mode MCS field.
- the base station can allocate 5 bits of information to the PRB domain, that is, use 5 bits of information to indicate the PRB domain contained in the DCI; in the aforementioned modulation and coding method MCS domain, the base station can be MCS The domain is allocated with 4 bits of information, that is, the 4 bits of information are used to indicate the MCS domain included in the DCI.
- the number of bits allocated to the non-shared information field contained therein may be calculated by the number of TBs.
- the non-shared information field may include the NDI field and the RV field.
- N is an integer greater than 1
- the number of bits required for the non-shared information field in the DCI is 2Nbit
- the base station can allocate 2Nbit of information for the non-shared information field included in the DCI.
- the base station may obtain the number of bits before compression in the shared information field of the transmission block and the number of bits before compression in the non-shared information field of the transmission block.
- taking the number of allocated bits in the shared information domain is fixed, and the number of allocated bits in the non-shared information domain is related to the number of TBs scheduled in the actual DCI as an example, when the base station is the PRB domain in the shared information domain , When 5bit information is allocated, that is, the 5bit information is used to indicate the PRB field contained in the DCI; for the MCS field in the shared information field, when 4bit information is allocated, that is, the 4bit information is used to indicate that the DCI contains The MCS domain.
- the number of bits before compression of the shared information domain acquired by the base station is 9 bits.
- the number of bits before compression corresponding to the NDI field and the RV field of each TB is 1 bit as an example, the number of bits before compression of the non-shared information field acquired by the base station is 2 bits.
- the base station may obtain the product of the number of bits before compression of the non-shared information domain and the number of transmission blocks according to the number of acquired transmission blocks. That is, the actual number of bits required for the non-shared information field in the DCI is calculated. For example, when the base station obtains the number of TBs scheduled by the DCI is N, the actual number of bits required for the non-shared information field in the DCI is 2Nbit.
- the base station may obtain the sum of the number of bits before compression of the non-shared information domain and the product as the amount of information before compression of the downlink control information. That is, the sum of the number of bits before compression of the shared information domain acquired by the base station and the obtained product is the amount of information before compression of the downlink control information.
- the amount of information before compression of the downlink control information obtained by the base station is (9+2N) bits.
- the base station determines whether the information field in the downlink control information needs to be compressed according to the size relationship between the information volume before compression and the information volume threshold, and the compression method when compression is required.
- the information amount threshold may be a fixed amount of information allocated to the DCI when the base station generates the DCI. That is, no matter how many TBs are scheduled by the DCI, the amount of information allocated by the base station for the DCI is equal to the information amount threshold.
- the amount of information allocated by the base station for DCI for the PRB, MCS, NDI, and RV domains is Mbit (M is an integer greater than or equal to 16). No matter how much information is scheduled in the DCI For each TB, DCI carries Mbit of information to indicate the PRB, MCS, NDI, and RV fields respectively.
- the base station can compare the acquired information volume before compression with the information volume threshold. When the information volume before compression is greater than the information volume threshold, it is determined that the shared information field in the DCI needs to be compressed; when the information volume before compression is not When it is greater than the information amount threshold, it is determined that it is not necessary to compress the shared information field in the DCI.
- the amount of information before compression of the downlink control information obtained by the above 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, it may not be necessary to compress the shared information field in the DCI.
- the base station compresses the shared information field in the DCI, the compressed information volume of the downlink control information should not be greater than M.
- 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 to compress part or all of the information domains in the shared information domain in the downlink control information.
- 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.
- the base station can compress the 5bit information allocated by the PRB field in DCI, or the base station can compress the 4bit information allocated by the MCS field in DCI Or, the base station may also compress both the amount of information allocated by the PRB field and the MCS field in the DCI.
- M 16 as an example, that is, the amount of information used by the base station in the DCI for the PRB, MCS, NDI, and RV fields is 16 bits.
- the information volume is 5 bits
- the MCS domain before compression The amount of information is 4 bits
- the amount of information in the NDI domain is 1 bit
- the amount of information in the RV domain is 1 bit.
- the actual amount of information required by the NDI domain and the RV domain is 2N.
- the compression strategy can refer to Table 3 below. Please refer to Table 3, which shows a compression schematic result of a base station involved in an embodiment of the present disclosure executing a corresponding compression strategy.
- the base station can select the compression method corresponding to the number of TBs to compress the shared information field in the DCI.
- the base station when the number of TBs is 4, the base station can compress the 5 bits of the PRB field to 4 bits, (that is, use 4 bits of information in the DCI to indicate the PRB field), so that the base station allocates the DCI
- the number of bits is not more than the information threshold 16bit.
- the base station when the number of TBs is 4, the base station can also compress the 4bit of the MCS domain to 3bit without compressing the 5bit of the PRB domain, etc., and the number of bits allocated by the base station for the DCI can also be different.
- the effect of 16 bits greater than the information threshold The present disclosure does not limit the specific compression strategy.
- Table 4 shows a compression schematic result of a base station involved in an embodiment of the present disclosure executing a corresponding compression strategy.
- the base station can compress the 5bit of the PRB field in DCI to 2bit when the number of TBs is between 4 and 6, and compress the 4bit of the MCS field to 2bit; when the number of TBs is 7 or 8. , The base station compresses the 5 bits of the PRB field in the DCI to 0 bits, and compresses the 4 bits of the MCS field to 0 bits.
- the base station can also use a single compression strategy to compress. For example, the base station can compress the PRB field in DCI when the number of TBs is greater than 4. Compress 5bit to 0bit, and compress 4bit of MCS domain to 0bit.
- the base station compresses the 5bit of the PRB field in DCI to 0bit and compresses the 4bit of the MCS field to 0bit, that is, the base station does not indicate the specific PRB resources and MCS mode of the terminal in the DCI. Directly adopt the default PRB resource and MCS mode to transmit MTC data.
- the base station compressing the PRB indication field in the downlink control information may include: limiting the amount of resource allocation indicated by the PRB field.
- the base station compresses the PRB domain it limits the resource allocation indicated by the PRB domain to 6 PRB resource allocations, which is equivalent to all PRB resources in a narrowband without additional
- the bits of the PRB domain indicate the PRB domain.
- 5 bits of information can be directly compressed, that is, DCI can carry less 5 bits of information.
- the base station when the base station compresses the PRB domain, it limits the resource allocation indicated by the PRB domain to 6 PRB resource allocation or 4 PRB resource allocation.
- the base station can use 2 bits for The indication of the PRB domain, in the MTC CE mode A mode, can directly compress the amount of 3bit information, that is, the DCI can carry less 3bit information.
- Table 5 shows the mapping relationship between the 3bit information carried in the DCI indication information and the specific PRB resource allocation manner in an embodiment of the present disclosure.
- the base station can use 2 bits to indicate the PRB domain in the DCI.
- the resource allocation position indicated by the PRB field may also be restricted.
- the base station compresses the PRB field it can limit the resource allocation indicated by the PRB field to correspond to one kind of allocated resource position.
- the allocated resource position corresponding to 4 PRB resource allocations is ( 3,4,5,6,), that is, when the resource allocation amount of the PRB domain in the DCI is 4, it indicates that the terminal can transmit data at a resource location of (3,4,5,6,) in a narrowband.
- the base station can use 3 bits to indicate the PRB domain.
- MTC CE mode A mode 2 bits of information can be directly compressed, that is, DCI can carry less 2 bits of information.
- Table 6, shows the mapping relationship between the 3bit information carried in the DCI indication information and the specific PRB resource allocation manner in an embodiment of the present disclosure.
- the base station when the base station compresses the PRB indication field in the downlink control information, it can limit both the amount of resource allocation indicated by the PRB field and the resource allocation position indicated by the PRB field.
- the base station when the base station compresses the PRB field, it can limit the resource allocation indicated by the PRB field to 3, 4, 5, and 6, respectively, and for each resource allocation amount, the resource allocation is also restricted.
- Table 7, shows the mapping relationship between the 2bit information carried in the DCI indication information and the specific PRB resource allocation manner in an embodiment of the present disclosure.
- each has a unique corresponding allocation resource location.
- the base station can also use 2 bits to indicate the PRB domain.
- MTC CE mode A mode 3 bits of information can be directly compressed , That is, DCI can carry 3bit less information.
- the base station compressing the MCS field in the downlink control information may include: restricting the MCS indicated by the MCS field to be a fixed MCS.
- the base station compresses the MCS field it limits the MCS indicated by the MCS field to a fixed MCS.
- the developer sets the fixed MCS to be the MCS with I MCS of 15 in Table 2 above, and the base station is in When assigning to the MCS domain, there is no need for additional bits to indicate the MCS domain.
- the terminal does not indicate the MCS domain in the received DCI, it will automatically select the MCS mode with I MCS of 15 for modulation and demodulation. Therefore, in the MTC CE mode A mode, 4bit information can be directly compressed, that is, DCI can carry less 4bit information.
- 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 designated MCSs, where the at least two MCSs are part of the MCSs in each MCS supported by the system.
- MCS is the MCS with I MCS of 14 and 15 in Table 2 above.
- the base station allocates the MCS domain, it only needs an extra 1 bit to indicate the MCS domain. Therefore, in the MTC CE mode A mode, you can directly Compress 3bit information volume, that is, DCI can carry less 3bit information volume. Please refer to Table 8, which shows the mapping relationship between 1-bit information used in the DCI indication information and the MCS scheme in an embodiment of the present disclosure.
- the MCS indicated by the MCS field may also be restricted to at least two MCS extracted from each MCS supported by the system in a specified extraction manner.
- the specified extraction method includes uniform extraction or non-uniform extraction.
- the MCS indicated by the MCS domain is restricted to 4 fixed MCSs uniformly extracted, for example According to the 4 fixed MCS that are uniformly extracted, they are the MCS with I MCS of 3, 7, 11 and 15 in Table 2 above.
- the base station allocates the MCS domain it only needs an extra 2 bits to indicate the MCS domain.
- the MCS indicated by the MCS domain is restricted to the 4 fixed MCSs extracted non-uniformly.
- the 4 fixed MCS extracted according to non-uniformity are the MCS with I MCS of 1, 7, 11 and 15 in Table 2 above.
- the base station allocates the MCS domain, it only needs an extra 2bit
- 2bit information can be directly compressed, that is, DCI can carry less 2bit information.
- Table 10 shows the mapping relationship between the 2bit information used in the DCI indication information and the MCS scheme in an embodiment of the present disclosure.
- step 504 the base station sends the downlink control information according to whether to compress the information field in the downlink control information, and the compression method when compression is required.
- the base station may determine whether the information field in the downlink control information needs to be compressed through the above steps according to the number of transmission blocks.
- the base station can compress the information field in the DCI according to a compression method corresponding to the number of transport blocks scheduled in the DCI, so as to send the compressed downlink control information to the terminal through the MPDCCH.
- the base station determines that it is not necessary to compress the information field in the downlink control information, the base station can also choose not to compress the information field in the DCI and directly issue the downlink control information.
- the base station obtains the number of transmission blocks scheduled by the downlink control information; and determines whether to compress the information field in the downlink control information according to the number of transmission blocks, and when compression is needed, it sends the downlink according to the corresponding compression method. Control information.
- the base station obtains the number of transmission blocks scheduled by the downlink control information, thereby obtaining a compression mode corresponding to the number of transmission blocks, and compresses the transmitted downlink control information to a corresponding degree according to the compression mode, so that the base station can according to the number of transmission blocks , Flexibly adjust the degree of compression of the downlink control information, thereby increasing the flexibility of the downlink control information scheduling transmission block while limiting the number of bits of the downlink control information, and expanding the application scenarios of compressing the downlink control information.
- Fig. 6 is a block diagram showing a device for sending downlink control information according to an exemplary embodiment.
- the device for sending downlink control information can be implemented as the implementation environment shown in Fig. 1 through hardware or a combination of software and hardware. All or part of the base station in FIG. 4 to perform the steps performed by the base station in any one of the embodiments shown in FIG. 4 or FIG. 5.
- the device for sending downlink control information may include:
- the quantity obtaining module 601 is configured to obtain the quantity of transmission blocks scheduled by downlink control information
- 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 transmission blocks, and when compression is needed, send the downlink control information according to a corresponding compression mode.
- the information sending module 602 includes: an information volume acquisition submodule and a compression mode determination submodule;
- the information volume acquisition submodule is configured to acquire the pre-compression information volume of the downlink control information according to the number of transmission blocks;
- the compression mode determining sub-module is configured to determine the compression mode according to the magnitude relationship between the amount of information before compression and an information amount threshold.
- the information volume acquiring submodule includes: a first acquiring unit and a second acquiring unit;
- the first obtaining unit is configured to 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;
- the second acquiring unit is configured to acquire the product of the number of bits before compression of the non-shared information field and the number of transmission blocks;
- the sum of the number of bits before compression of the shared information field and the product is the amount of information before compression of the downlink control information.
- the shared information field includes a physical resource block PRB field and/or a modulation and coding scheme MCS field.
- the compression mode is used to indicate a compression strategy for the information field in the downlink control information.
- the compression strategy includes at least one of the following strategies:
- the compressing the PRB indication field in the downlink control information includes:
- the resource allocation amount indicated by the PRB field and the resource allocation position indicated by the PRB field are restricted.
- the compressing the MCS field in the downlink control information includes:
- the MCS indicated by the MCS domain is restricted to at least two MCS extracted from each MCS supported by the system according to a specified extraction manner.
- the specified extraction method includes uniform extraction or non-uniform extraction.
- the device provided in the above embodiment realizes its functions, only the division of the above functional modules is used for illustration. In actual applications, the above functions can be allocated by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
- An exemplary embodiment of the present disclosure provides a device for sending downlink control information, which can implement all or part of the steps performed by a base station in the embodiment shown in FIG. 4 or FIG. 5 of the present disclosure.
- the device for sending downlink control information includes: A memory for storing executable instructions of the processor;
- the processor is configured to:
- the 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 a corresponding compression mode, and the processing is configured as:
- the processor is configured to:
- the sum of the number of bits before compression of the shared information field and the product is the amount of information before compression of the downlink control information.
- the shared information field includes a physical resource block PRB field and/or a modulation and coding scheme MCS field.
- the compression mode is used to indicate a compression strategy for the information field in the downlink control information.
- the compression strategy includes at least one of the following strategies:
- the compressing the PRB indication field in the downlink control information includes:
- the resource allocation amount indicated by the PRB field and the resource allocation position indicated by the PRB field are restricted.
- the compressing the MCS field in the downlink control information includes:
- the MCS indicated by the MCS domain is restricted to at least two MCS extracted from each MCS supported by the system according to a specified extraction manner.
- the specified extraction method includes uniform extraction or non-uniform extraction.
- the base station includes hardware structures and/or software modules corresponding to each function.
- the embodiments 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 by hardware or computer software-driven hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the technical solutions of the embodiments of the present disclosure.
- Fig. 7 is a schematic structural diagram showing a base station according to an exemplary embodiment.
- the base station 700 includes a communication unit 704 and a processor 702.
- the processor 702 may also be a controller, which is represented as "controller/processor 702" in FIG. 7.
- the communication unit 704 is used to support the base station to communicate with other network devices (for example, terminals, other base stations, gateways, etc.).
- the base station 700 may further include a memory 703, where the memory 703 is used to store program codes and data of the base station 700.
- FIG. 7 only shows a simplified design of the base station 700.
- 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 protection scope of the embodiments of the present disclosure.
- the functions described in the embodiments of the present disclosure may be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium.
- the computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another.
- the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.
- the embodiment of the present disclosure also provides a computer storage medium for storing computer software instructions used by the above-mentioned base station, which includes a program designed to execute the above-mentioned downlink control information sending method.
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Abstract
Description
调度TB数 | NDI/bit | RV/bit | MCS/bit | PRB/bit | 剩余bit |
1 | 1 | 1 | 4 | 5 | 5 |
2 | 2 | 2 | 4 | 5 | 3 |
3 | 3 | 3 | 4 | 5 | 1 |
4 | 4 | 4 | 4 | 4 | 0 |
5 | 5 | 5 | 2 | 4 | 0 |
6 | 6 | 6 | 2 | 2 | 0 |
7 | 7 | 7 | 1 | 1 | 0 |
8 | 8 | 8 | 0 | 0 | 0 |
调度TB数 | NDI/bit | RV/bit | MCS/bit | PRB/bit | 剩余bit |
1 | 1 | 1 | 4 | 5 | 5 |
2 | 2 | 2 | 4 | 5 | 3 |
3 | 3 | 3 | 4 | 5 | 1 |
4 | 4 | 4 | 2 | 2 | 4 |
5 | 5 | 5 | 2 | 2 | 2 |
6 | 6 | 6 | 2 | 2 | 0 |
7 | 7 | 7 | 0 | 0 | 2 |
8 | 8 | 8 | 0 | 0 | 0 |
Claims (20)
- 一种下行控制信息发送方法,其特征在于,所述方法包括:获取下行控制信息调度的传输块的数量;根据所述传输块的数量确定是否对所述下行控制信息中的信息域进行压缩,以及当需要进行压缩时,根据对应的压缩方式发送所述下行控制信息。
- 根据权利要求1所述的方法,其特征在于,所述根据所述传输块的数量确定是否对所述下行控制信息中的信息域进行压缩,以及当需要进行压缩时,根据对应的压缩方式发送所述下行控制信息,包括:根据所述传输块的数量获取所述下行控制信息的压缩前信息量;根据所述压缩前信息量与信息量阈值之间的大小关系确定是否需要对所述下行控制信息中的信息域进行压缩,以及当需要进行压缩时的所述压缩方式。
- 根据权利要求2所述的方法,其特征在于,所述根据所述传输块的数量获取所述下行控制信息的压缩前信息量,包括:获取所述传输块的共享信息域的压缩前比特数,以及所述传输块的非共享信息域的压缩前比特数;获取所述非共享信息域的压缩前比特数与所述传输块的数量的乘积;所述共享信息域的压缩前比特数与所述乘积之和即为所述下行控制信息的压缩前信息量。
- 根据权利要求3所述的方法,其特征在于,所述共享信息域包括物理资源块PRB域和/或调制编码方式MCS域。
- 根据权利要求1至4任一所述的方法,其特征在于,所述压缩方式用于指示对所述下行控制信息中的信息域的压缩策略。
- 根据权利要求5所述的方法,其特征在于,所述压缩策略包括以下策略中的至少一种:对所述下行控制信息中的PRB域进行压缩;以及,对所述下行控制信息中的MCS域进行压缩。
- 根据权利要求6所述的方法,其特征在于,所述对所述下行控制信息中的PRB指示域进行压缩,包括:限制所述PRB域指示的资源分配量;或者,限制所述PRB域指示的资源分配位置;或者,限制所述PRB域指示的资源分配量以及所述PRB域指示的资源分配位置。
- 根据权利要求6所述的方法,其特征在于,所述对所述下行控制信息中的MCS域进行压缩,包括:限制所述MCS域指示的MCS为固定MCS;或者,限制所述MCS域指示的MCS为指定的至少两个MCS,所述至少两个MCS是系统支持的各个MCS中的部分MCS;或者,限制所述MCS域指示的MCS为按照指定抽取方式从系统支持的各个MCS中抽取的至少两个MCS。
- 根据权利要求8所述的方法,其特征在于,所述指定抽取方式包括均匀抽取或者非均匀抽取。
- 一种下行控制信息发送装置,其特征在于,所述装置包括:数量获取模块,用于获取下行控制信息调度的传输块的数量;信息发送模块,用于根据所述传输块的数量确定是否对所述下行控制信息中的信息域进行压缩,以及当需要进行压缩时,根据对应的压缩方式发送所述下行控制信息。
- 根据权利要求10所述的装置,其特征在于,所述信息发送模块包括:信息量获取子模块以及压缩方式确定子模块;所述信息量获取子模块,用于根据所述传输块的数量获取所述下行控制信息的压缩前信息量;所述压缩方式确定子模块,用于根据所述压缩前信息量与信息量阈值之间的大小关系确定所述压缩方式。
- 根据权利要求11所述的装置,其特征在于,所述信息量获取子模块,包括:第一获取单元以及第二获取单元;所述第一获取单元,用于获取所述传输块的共享信息域的压缩前比特数,以及所述传输块的非共享信息域的压缩前比特数;所述第二获取单元,用于获取所述非共享信息域的压缩前比特数与所述传输块的数量的乘积;所述共享信息域的压缩前比特数与所述乘积之和即为所述下行控制信息的压缩前信息量。
- 根据权利要求12所述的装置,其特征在于,所述共享信息域包括物理资源块PRB域和/或调制编码方式MCS域。
- 根据权利要求10至13任一所述的装置,其特征在于,当所述压缩方式用于指示对所述下行控制信息中的信息域进行压缩时,所述压缩方式还用于指示对所述下行控制信息中的信息域的压缩策略。
- 根据权利要求14所述的装置,其特征在于,所述压缩策略包括以下策略中的至少一种:对所述下行控制信息中的PRB域进行压缩;以及,对所述下行控制信息中的MCS域进行压缩。
- 根据权利要求15所述的装置,其特征在于,所述对所述下行控制信息中的PRB指示域进行压缩,包括:限制所述PRB域指示的资源分配量;或者,限制所述PRB域指示的资源分配位置;或者,限制所述PRB域指示的资源分配量以及所述PRB域指示的资源分配位置。
- 根据权利要求15所述的装置,其特征在于,所述对所述下行控制信息中的MCS域进行压缩,包括:限制所述MCS域指示的MCS为固定MCS;或者,限制所述MCS域指示的MCS为指定的至少两个MCS,所述至少两个MCS是系统支持的各个MCS中的部分MCS;或者,限制所述MCS域指示的MCS为按照指定抽取方式从系统支持的各个MCS中抽取的至少两个MCS。
- 根据权利要求17所述的装置,其特征在于,所述指定抽取方式包括均匀抽取或者非均匀抽取。
- 一种下行控制信息发送装置,其特征在于,所述装置包括:处理器;用于存储所述处理器的可执行指令的存储器;其中,所述处理器被配置为:获取下行控制信息调度的传输块的数量;根据所述传输块的数量确定是否对所述下行控制信息中的信息域进行压缩,以及当需要进行压缩时,根据对应的压缩方式发送所述下行控制信息。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中包含可执行指令,基站中的处理器调用所述可执行指令以实现上述权利要求1至9任一所述的下行控制信息发送方法。
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BR112021022295A BR112021022295A2 (pt) | 2019-05-09 | 2019-05-09 | Método e aparelho para enviar informação de controle de enlace descendente, aparelho para informação de controle de enlace descendente, e, mídia de armazenamento legível por computador |
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US20220217581A1 (en) | 2022-07-07 |
JP2022531715A (ja) | 2022-07-08 |
JP7238169B2 (ja) | 2023-03-13 |
EP3968555A1 (en) | 2022-03-16 |
CN114980201A (zh) | 2022-08-30 |
CN110383748A (zh) | 2019-10-25 |
EP3968555A4 (en) | 2022-05-18 |
SG11202112337QA (en) | 2021-12-30 |
CN110383748B (zh) | 2022-05-13 |
BR112021022295A2 (pt) | 2022-01-18 |
KR20220004211A (ko) | 2022-01-11 |
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