WO2022067649A1 - 一种dci传输方法、装置、芯片及*** - Google Patents
一种dci传输方法、装置、芯片及*** Download PDFInfo
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- WO2022067649A1 WO2022067649A1 PCT/CN2020/119349 CN2020119349W WO2022067649A1 WO 2022067649 A1 WO2022067649 A1 WO 2022067649A1 CN 2020119349 W CN2020119349 W CN 2020119349W WO 2022067649 A1 WO2022067649 A1 WO 2022067649A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/12—Mobility data transfer between location registers or mobility servers
Definitions
- the present application relates to the field of wireless communication technologies, and in particular, to a DCI transmission method, device, chip and system.
- the network device can select specific transmission weights to send different data streams to eliminate the need for each user. Since the transmission weights need to avoid each other, the transmission power loss of the network equipment will be large, resulting in performance loss. In addition, when the channel frequency selection and time variation are severe, the selection of transmission weights based on information will be inaccurate. Therefore, it is difficult to eliminate residual interference between the data streams of different users corresponding to the selected transmission weights, which will also cause performance loss. . In addition, if the network device uses a predetermined codebook set to select the transmission weight, there will also be a problem that residual interference between data streams is difficult to eliminate, resulting in performance loss.
- Embodiments of the present application provide a downlink control information (downlink control information, DCI) transmission method, device, chip, and system, which are used to eliminate interference in data transmission between users, improve performance, and meet multiple DCI transmission scenarios.
- DCI downlink control information
- an embodiment of the present application provides a DCI transmission method, including: a network device sends a first DCI and a second DCI, a first terminal device receives the first DCI and the second DCI, and the first DCI
- the second DCI is used for scheduling the first data flow of the first terminal equipment
- the second DCI is used for scheduling the second data flow DCI of the second terminal equipment, and the second data flow causes interference to the first data flow.
- the first DCI may schedule one or more first data streams.
- Each second DCI may schedule one or more second data streams.
- the network device sends the first DCI of the first terminal device itself and the second DCI that interferes with the first terminal device to the first terminal device, and the first terminal device may, according to the first DCI and the second DCI,
- the first data stream sent to the first terminal device itself is directly demodulated, so that interference can be directly suppressed, the interference suppression capability of the terminal device can be improved, the interference existing in data transmission between the terminal devices can be eliminated, and the network performance can be improved.
- a second data stream that interferes with the first terminal device may be demodulated according to the first DCI and the second DCI, so as to further improve the interference suppression capability of the terminal device.
- the network device may further send the first downlink reference signal of the first DCI and the second downlink reference signal of the second DCI to the first terminal device.
- the first terminal device may receive a first downlink reference signal and at least one second downlink reference signal, where the first downlink reference signal and the second downlink reference signal are used to demodulate the first data stream.
- the first downlink reference signal and the second downlink reference signal may also be used to demodulate the second data stream.
- the network device can ensure that the first terminal device can estimate the channel with the network device as accurately as possible, so as to maximize the It is possible to accurately demodulate the received data stream and improve network performance.
- the first terminal device may perform channel estimation according to the first downlink reference signal of the first DCI to obtain a first channel estimation result; the first terminal device may also perform channel estimation according to the first downlink reference signal of the first DCI. performing channel estimation on the second downlink reference signal of the second DCI to obtain a second channel estimation result.
- the first terminal device can estimate the channel with the network device as accurately as possible according to the first downlink reference signal and the second downlink reference signal, so as to demodulate the received signal as accurately as possible. data flow and improve network performance.
- the network device may send the first data stream to the first terminal device and send the second data stream to the second terminal device.
- the first terminal device receives the first data stream, and since the second data stream interferes with the first data stream, the first terminal device may also receive the second data stream.
- the first terminal device can directly demodulate the first data stream sent to the first terminal device itself according to the first DCI and the second DCI, so that interference can be directly suppressed and each terminal device can be eliminated. Interference between data transmission and improve network performance. And optionally, the second data stream causing interference to the pair may be demodulated according to the first DCI and the second DCI, so as to further improve the interference suppression capability of the terminal device.
- the first terminal device demodulates the first data stream according to the first DCI and the second DCI, including:
- the first terminal device may demodulate the first data stream according to the first channel estimation result and the second channel estimation result.
- the first terminal device can demodulate the received data stream as accurately as possible according to the channel estimation result, thereby improving network performance.
- the network device may further determine a second data stream that interferes with the first data stream.
- the network device sends the first DCI corresponding to the first data stream and the second DCI causing interference to the first terminal device by determining the second data stream that interferes with the first data stream , to ensure that the first terminal device can correctly demodulate the first data stream and eliminate the interference of the second data stream to the first data stream.
- an embodiment of the present application provides a DCI transmission method, including a network device sending a first DCI and a second DCI, a first terminal device receiving the first DCI and the second DCI, and the first DCI indicating time-domain resources and frequency-domain resources used for transmitting retransmission data, the second DCI indicates time-domain resources and frequency-domain resources used for transmitting initial transmission data, and the time-domain resources indicated by the first DCI and the first DCI
- the time domain resources indicated by the two DCIs are the same, and the frequency domain resources indicated by the first DCI are different from the frequency domain resources indicated by the second DCI;
- the network device sends retransmission data on the time domain resources and frequency domain resources indicated by the first DCI, and sends initial transmission data on the time domain resources and frequency domain resources indicated by the second DCI.
- the first terminal device receives retransmission data on the time domain resources and frequency domain resources indicated by the first DCI, and receives initial transmission data on the time domain resources and frequency domain resources indicated by the second DCI.
- the network device When the network device sends the retransmitted data, it will use the full bandwidth to send the retransmitted data, but the retransmitted data may not be able to occupy the full bandwidth, resulting in wasted part of the bandwidth resources that do not send the retransmitted data in the full bandwidth.
- This application implements In an example, the network device can transmit the retransmission data and the initial transmission data at the same time on the same time domain resource, so as to avoid waste of resources and improve the throughput rate and network performance.
- the network device may further divide the entire bandwidth of the channel between the network device and the first terminal device into the first subband and a second subband; the network device allocates a first DCI for retransmission data to the first subband, and allocates a second DCI for initial transmission data to the second subband.
- the first subband is a frequency domain resource used for transmitting retransmission data
- the second subband is a frequency domain resource used for transmitting initial transmission data.
- the network device can transmit the retransmission data and the initial transmission data at the same time, thereby avoiding the waste of resources.
- an embodiment of the present application provides a DCI transmission method, including: a network device sending a first DCI and a second DCI to a terminal device, where the first DCI indicates a time slot and a first subband used for data transmission, The second DCI indicates a time slot and a second subband for transmitting data, the first DCI and the second DCI indicate the same time slot, and the first subband and the second subband are different ; the network device sends the first data on the first subband and sends the second data on the second subband.
- the terminal device may receive the first data on the first subband and/or receive the second data on the second subband.
- the time-frequency resources indicated by the first DCI and the second DCI are the same or different.
- the first subband and the second subband suffer from different degrees of interference.
- the corresponding DCI is selected according to the subband with greater interference; Select the corresponding DCI for the smaller subband. If the bandwidth allocated by the network device to the terminal device spans the subband with greater interference and the subband with less interference, the DCI and interference corresponding to the subband with greater interference are used at the same time.
- the DCI corresponding to the smaller subband performs data transmission.
- the terminal device simultaneously uses the DCI corresponding to the subband with greater interference and the DCI corresponding to the subband with less interference to demodulate the data.
- embodiments of the present application provide a DCI transmission apparatus/communication apparatus, where the apparatus has the function of implementing the terminal equipment or network equipment in the foregoing method embodiments.
- These functions can be implemented by hardware or by executing corresponding software by hardware.
- the hardware or software includes one or more functional modules corresponding to the above-mentioned functions.
- the terminal equipment includes a first terminal equipment.
- an embodiment of the present application provides a DCI transmission device/communication device.
- the device may be a terminal device or a network device in the above method embodiments, or a chip set in a terminal device or a network device.
- the communication device It includes a transceiver and a processor, and optionally, also includes a memory, wherein the memory is used to store computer programs or instructions, and the processor is respectively coupled to the memory and the transceiver, and when the processor executes the computer program or instructions, the The communication apparatus executes the method executed by the terminal device or the network device in the foregoing method embodiments.
- an embodiment of the present application provides a computer program product, where the computer program product includes: computer program code, when the computer program code is run on a computer, causing the computer to execute the method described in any one of the foregoing aspects.
- an embodiment of the present application provides a chip system, the chip system includes a processor and a memory, the processor and the memory are electrically coupled; the memory is used for storing computer program instructions; the processing A processor is used to execute part or all of the computer program instructions in the memory, and when the part or all of the computer program instructions are executed, it is used to implement the method described in any one of the above aspects.
- the chip system further includes a transceiver, and the transceiver is configured to send a signal processed by the processor, or receive a signal input to the processor.
- the chip system may be composed of chips, or may include chips and other discrete devices.
- an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method described in any one of the foregoing aspects is implemented.
- an embodiment of the present application provides a communication system, and the system may include a (first) terminal device that executes the method described in any of the foregoing aspects, and a network device that executes the method described in any of the foregoing aspects.
- FIG. 1 is an architectural diagram of a network system applicable in the embodiment of the application
- FIG. 2 , FIG. 3 , FIG. 4 , and FIG. 6 are schematic flowcharts of a DCI transmission applicable in the embodiments of the present application;
- FIG. 5 and FIG. 7 are schematic diagrams of time-frequency domain resources occupied by data transmission applicable in the embodiment of the present application.
- FIG. 8 and FIG. 9 are structural diagrams of a DCI transmission apparatus applicable in the embodiments of the present application.
- the word "exemplary” is used to mean serving as an example, illustration or illustration. Any embodiment or design described in this application as "exemplary” should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word example is intended to present a concept in a concrete way.
- the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application.
- the evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
- Terminal devices including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity sexual equipment.
- it may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem.
- the terminal equipment can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN.
- RAN radio access network
- the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, vehicle to everything (V2X) terminal equipment , machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, light terminal equipment (light UE), subscriber unit ( subscriber unit), subscriber station (subscriber station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), User terminal, user agent, or user device, etc.
- UE user equipment
- D2D device-to-device
- V2X vehicle to everything
- M2M/MTC machine-to-machine/machine-type communications
- IoT Internet of things
- light UE light UE
- subscriber unit subscriber unit
- subscriber station subscriber station
- mobile station mobile station
- remote station remote station
- access point access point
- AP remote terminal
- these may include mobile telephones (or "cellular" telephones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, computer-embedded mobile devices, and the like.
- mobile telephones or "cellular" telephones
- PCS personal communication service
- SIP session initiation protocol
- WLL wireless local loop
- PDA personal digital assistant
- constrained devices such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc.
- it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners.
- RFID radio frequency identification
- GPS global positioning system
- the terminal device may also be a wearable device.
- Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait.
- a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
- wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
- Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
- the various terminal devices described above if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as on-board terminal equipment.
- the on-board terminal equipment is also called on-board unit (OBU). ).
- the terminal device may further include a relay (relay).
- a relay relay
- any device capable of data communication with the base station can be regarded as a terminal device.
- the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, such as a chip system, and the apparatus may be installed in the terminal device.
- the chip system may be composed of chips, or may include chips and other discrete devices.
- Network equipment including, for example, access network (AN) equipment, such as a base station (for example, an access point or a transmission point), which may refer to an access network that communicates with wireless terminal equipment through one or more cells over the air interface.
- AN access network
- base station for example, an access point or a transmission point
- the device for communication or for example, a network device in a vehicle-to-everything (V2X) technology is a roadside unit (RSU).
- the base station may be used to interconvert the received air frames and IP packets, acting as a router between the terminal equipment and the rest of the access network, which may include the IP network.
- the RSU can be a fixed infrastructure entity supporting V2X applications and can exchange messages with other entities supporting V2X applications.
- the network device can also coordinate the attribute management of the air interface.
- the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (long term evolution, LTE) system or long term evolution-advanced (LTE-A), Alternatively, it may also include the next generation node B (gNB) in the 5th generation mobile communication technology (the 5th generation, 5G) NR system (also referred to as the NR system for short), or may also include a cloud access network (cloud access network).
- a centralized unit (CU) and a distributed unit (DU) in a radio access network (Cloud RAN) system or may be an apparatus for carrying network device functions in a future communication system.
- the embodiments of this application do not Not limited.
- the network equipment may also include core network equipment.
- the core network equipment includes, for example, an access and mobility management function (AMF) or a user plane function (UPF) and the like.
- AMF access and mobility management function
- UPF user plane function
- the network device may also be a device for device-to-device (D2D) communication, machine-to-machine (M2M) communication, Internet of Vehicles, or a device carrying network device functions in a satellite communication system.
- D2D device-to-device
- M2M machine-to-machine
- Internet of Vehicles Internet of Vehicles
- At least one item(s) below or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
- at least one item (a) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c may be single or multiple .
- the ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority or priority of multiple objects. Importance.
- the first data packet and the second data packet are only for distinguishing different data packets, but do not indicate the difference in content, priority, sending order, or importance of the two data packets.
- the first DCI, the second DCI, the third DCI, the fourth DCI, the fifth DCI, and the sixth DCI are only used to distinguish different DCIs. / Whether the second DCI is the same is not limited.
- the first sub-band, the second sub-band, the third sub-band and the fourth sub-band are only to distinguish different sub-bands. The same is not limited.
- the communication methods provided in the embodiments of the present application can be applied to various communication systems, for example, satellite communication systems, Internet of things (Internet of things, IoT), narrow-band Internet of things (NB-IoT) systems, global Mobile communication system (global system for mobile communications, GSM), enhanced data rate for GSM evolution (enhanced data rate for GSM evolution, EDGE), wideband code division multiple access system (wideband code division multiple access, WCDMA), code division multiple access 2000 system (code division multiple access, CDMA2000), time division synchronization code division multiple access system (time division-synchronization code division multiple access, TD-SCDMA), long term evolution system (long term evolution, LTE), fifth generation (5G) ) communication systems, such as 5G new radio (NR), and three major application scenarios of 5G mobile communication systems: enhanced mobile broadband (eMBB), ultra-reliable, low-latency communications (ultra reliable low latency communications) , uRLLC) and massive machine type communications (mMTC), or other or future communication systems.
- enhanced mobile broadband
- the network architecture shown in FIG. 1 includes network devices and terminal devices, and the number of the network devices may be one or more, and the number of the terminal devices may be one or more (as shown in FIG. 1 , two terminals equipment), the types and quantities of network equipment and terminal equipment are not limited in the embodiments of this application.
- the network device may also be understood as a downlink transmission transmission point.
- the network device can implement scheduling of downlink resources, and optionally, a downlink resource scheduling module in the network device can deliver DCI and a data stream corresponding to the DCI to the terminal device.
- the data stream corresponding to the DCI refers to the data stream scheduled by the DCI.
- the terminal device may receive downlink scheduling information, for example, a receiver module in the terminal device may receive downlink scheduling information.
- the terminal device can also implement functions such as channel estimation, channel equalization, and signal/information demodulation. It can be understood that one terminal device corresponds to one (scheduling) user, so in this embodiment of the present application, the concepts of terminal device and (scheduling) user may be used interchangeably.
- the terminal device demodulates the received data stream according to the instruction of the DCI, thereby realizing the service.
- the network device can select specific transmission weights to send different data streams to eliminate the need for each user. Because the transmission weights need to avoid each other, that is, the transmission weights need to be kept different, which will lead to a large loss of transmission power of the network device, resulting in performance loss. In addition, when the channel frequency selection and time variation are severe, the selection of transmission weights based on information will be inaccurate. Therefore, it is difficult to eliminate residual interference between the data streams of different users corresponding to the selected transmission weights, which will also cause performance loss. . In addition, if the network device uses a predetermined codebook set to select the transmission weight, there will also be a problem that residual interference between data streams is difficult to eliminate, resulting in performance loss.
- an embodiment of the present application provides a DCI transmission method, and the DCI transmission method provided by the embodiment of the present application is applicable to the communication system shown in FIG. 1 .
- the first terminal equipment can receive the first DCI of the first terminal equipment and the second DCI of other terminal equipment, and the data flow of other terminal equipment interferes with the data flow of the first terminal equipment, the first terminal equipment
- the received data stream can be jointly detected according to the first DCI and the second DCI, the data stream of the first terminal device can be detected, and the data stream of other terminal devices can be optionally detected, thereby eliminating the data streams of other terminal devices.
- the interference caused by the data flow to the first terminal device improves the performance.
- the specific flow of the DCI transmission method may include:
- a network device sends a first DCI and a second DCI to a first terminal device, and the first terminal device receives the first DCI and the second DCI, where the first DCI is used to schedule the first DCI The first data flow, the second DCI is used to schedule the second data flow of the second terminal device, and the second data flow causes interference to the first data flow.
- the first DCI may schedule one or more second data streams.
- each second DCI may also schedule one or more second data streams.
- the network device may further determine a second data flow that interferes with the first data flow, so that the first DCI used to schedule the first data flow and the second data flow that is used to schedule the interference
- the second DCI is sent to the first terminal device to ensure that the first terminal device can correctly demodulate the first data stream, and optionally demodulate the second data stream that causes interference, thereby eliminating the second data stream flow interference with the first data flow.
- the network device may determine whether the following conditions are met: the (downlink) transmission weight of the other terminal equipment is equal to the (downlink) transmission weight of the first terminal equipment. Whether the correlation satisfies the first value range, or the channel of other terminal equipment is the same as the channel of the first terminal equipment.
- the correlation between the (downlink) transmission weights of the other terminal equipment and the (downlink) transmission weights of the first terminal equipment can be calculated by a certain algorithm, which is not implemented in this embodiment of the present application. limited.
- the first data stream is the data stream that the first terminal device actually expects to receive, so it can be considered that the first data stream is a real data stream.
- the first DCI is used to schedule the first data stream , so the first DCI can be considered to be the real DCI.
- the second data stream is a data stream that the first terminal device does not expect to receive and causes interference to the first data stream. Therefore, it can be considered that the second data stream is a virtual data stream.
- the second DCI is used to schedule the second data stream, so the second DCI can be considered as a virtual DCI.
- the first terminal device can receive both the first data stream and the second data stream, since the first data stream is actually sent by the network device to the second data stream
- the second data stream is actually sent by the network device to the second terminal device, but is received by the first terminal device due to interference. Therefore, for the first terminal device, the first data stream is The stream is a real data stream, and the second data stream is a virtual data stream.
- the first DCI is used to schedule real data streams
- the second DCI is used to schedule virtual data streams. Therefore, for the first terminal device, the first DCI is a real DCI, and the second DCI is a virtual data stream. DCI.
- the network device may also send indication information to the first terminal device, indicating that the first DCI is used to schedule the first data stream, and the second DCI is used to schedule the second data stream that causes interference . It can also be understood that the indication information is used to indicate that the first DCI is a real DCI and the second DCI is a virtual DCI.
- the network device may send the first DCI and the second DCI to the first terminal device through a physical downlink control channel (PDCCH) channel or other methods.
- PDCH physical downlink control channel
- the network device may also send the first downlink reference signal of the first DCI and the second downlink reference signal of the second DCI to the first terminal device.
- the first downlink reference signal and the second downlink reference signal are used for channel estimation and demodulation of the first data stream. If there are one or more second DCIs, there are also one or more second downlink reference signals, and the second DCIs and the second downlink reference signals are in one-to-one correspondence.
- the downlink reference signal may be a demodulation reference signal (demodulation reference signal, DMRS), or other downlink reference signals used for channel estimation.
- the network device sends a first data stream to the first terminal device, and sends a second data stream to the second terminal device; the first terminal device receives the first data stream and the second data stream data flow.
- the network device only sends the first data stream to the first terminal device, and the first terminal device expects to receive only the first data stream, but because the second data stream affects the first data stream. Therefore, when the network device sends the second data stream to the second terminal device, the first terminal device will actually receive the second data stream. At this time, the first terminal device It is necessary to accurately demodulate the first data stream from the received multiple data streams.
- the first data stream sent by the network device to the first terminal device may be one or more data streams.
- only the first data stream is one data stream as:
- the present application is also applicable to the scenario in which the first data stream is multiple data streams.
- the network device may send the first data stream and the second data stream through a physical downlink shared channel (PDSCH) or other methods, and the first terminal device may send the first data stream through the PDSCH channel or other methods
- the second terminal device may receive the second data stream through a PDSCH channel or other means.
- PDSCH physical downlink shared channel
- S203 The first terminal device demodulates the first data stream according to the first DCI and the second DCI.
- the first terminal device may further demodulate the second data stream according to the first DCI and the second DCI.
- the first terminal device may further perform channel estimation according to the first downlink reference signal to obtain a first channel estimation result; and perform channel estimation according to the second downlink reference signal to obtain a second channel estimation result.
- the first terminal device demodulates the first data stream according to the first channel estimation result and the second channel estimation result.
- the first terminal device demodulates the second data stream according to the first channel estimation result and the second channel estimation result.
- the first terminal device can directly use the demodulated second data stream as an interference stream, so that interference can be directly suppressed.
- S301 The base station 1 selects the virtual data stream of the terminal device 1.
- the real data stream of the terminal device 1 includes S1_1, and the virtual data stream of the terminal device 1 includes S2_1, S2_2 and S3_1.
- the DCI used for scheduling the real data flow is the real DCI
- the DCI used for scheduling the virtual data flow is the virtual DCI.
- the real DCI of the S1_1 used for scheduling the terminal device 1 is DCI1.
- the S2_1 and S2_2 are delivered to the terminal device 2, and the virtual DCI of the S2_1 and S2_2 used for scheduling the terminal device 2 is DCI2.
- S3_1 is delivered to the terminal device 3, and the virtual DCI of the S3_1 used for scheduling the terminal device 3 is DCI3.
- the base station 1 sends the real DCI and virtual DCI of the terminal device 1 to the terminal device 1 through the PDCCH channel or other means.
- the terminal device 1 receives the real DCI and virtual DCI.
- the base station 1 sends real DCI (eg DCI1 ) and virtual DCI (eg DCI2 and DCI3 ) to the terminal device 1 .
- real DCI eg DCI1
- virtual DCI eg DCI2 and DCI3
- the base station 1 sends the demodulation reference signal (demodulation reference signal, DMRS) 1 of the DCI1, the DMRS2 of the DCI2, and the DMRS3 of the DCI3 to the terminal device 1.
- the terminal device 1 receives DMRS1, DMRS2 and DMRS3.
- DMRS1, DMRS2 and DMRS3 can also be replaced with other downlink reference signals used for channel estimation.
- the method further includes S304: the terminal device 1 performs channel estimation according to DMRS1 to obtain a first channel estimation result H1, performs channel estimation according to DMRS2 to obtain a second channel estimation result H2, and performs channel estimation according to DMRS3 to obtain a third channel. Estimated result H3.
- H1, H2 and H3 are the channel estimation results from the base station to the terminal equipment 1
- H1 is the channel estimation result of the equivalent channel of the base station sending DMRS1 to the terminal equipment 1
- H2 is the equivalent channel of the base station sending DMRS2 to the terminal equipment 1.
- the channel estimation result, H3 is the channel estimation result of the equivalent channel that the base station sends DMRS3 to the terminal device 1 .
- the base station 1 weights the data of the terminal device 1 according to the transmission weight of the terminal device 1, and sends the weighted data S1_1 to the terminal device 1 through the PDSCH channel.
- the data is weighted, the weighted data S2_1 and S2_2 are sent to the terminal device 2 through the PDSCH channel, the data of the terminal device 3 is weighted according to the transmission weight of the terminal device 3, and the weighted data S3_1 is sent through the PDSCH channel to terminal device 3.
- the terminal device 1 receives S1_1 sent to the terminal device 1 , S2_1 and S2_2 sent to the terminal device 2 , and S3_1 sent to the terminal device 3 .
- S2_1, S2_2, and S3_1 will reach the terminal device 1 through the physical channel from the base station to the terminal device 1, and be received by the terminal device 1, thereby causing interference to the S1_1 that the terminal device 1 actually wants to receive.
- data is also called data symbol, and the two can be used interchangeably.
- the method further includes S306: the terminal device 1 demodulates S1_1 according to H1, H2, H3, and DCI1, DCI2, and DCI3.
- the terminal device 1 may also demodulate S2_1 and S2_2, and/or demodulate S3_1 according to H1, H2, H3 and DCI1, DCI2, and DCI3.
- the embodiment is described with a scenario.
- the number of streams is 2, and the number of streams in which the base station sends DMRS pilot symbols or data symbols to the terminal device 2 is 2. That is, the base station sends two data streams to terminal device 1 and two data streams to terminal device 2 .
- the data symbols are data symbols in the data stream.
- the data symbols When the base station sends the second data stream to the terminal device 2, the data symbols will be weighted by the transmission weight of the terminal device 2, and the weighted data symbols will reach the destination device through the physical channel from the base station to the terminal device 1.
- the terminal device 1 is received by the terminal device 1, thereby causing interference to the terminal device 1.
- the terminal device 1 can calculate the equalization coefficient according to the received DMRS pilot symbols, and then detect the data symbols in the real data stream from the received data symbols according to the calculated equalization coefficients.
- y 1 is the DMRS symbol received by the terminal device 1, the dimension is 4*1, H 1, 4 ⁇ 64 is the physical channel from the base station to the terminal device 1, the dimension is 4*64, P 1, 64 ⁇ 2 is the base station to The transmission weight used for the weighting of terminal equipment 1 (for both DMRS pilot signals and data symbols), the dimension is 64*2, s 1, 2 ⁇ 1 is the pilot symbol of terminal equipment 1, and the dimension is 2*1, P 2, 64 ⁇ 2 is the transmission weight used by the base station to weight the terminal device 2 (both for DMRS pilot symbols and data symbols), dimension 64*2, s 2, 2 ⁇ 1 is the pilot symbol of the terminal device 2, the dimension is 2*1, and n 4 ⁇ 1 is the noise received by the terminal device 1, and the dimension is 4*1.
- H 1 P 1 s 1 is the real symbol that the terminal device 1 wants to receive, and both H 1 P 2 s 2 and n are interference.
- the base station sends P 1,64 ⁇ 2 to the terminal equipment 1, and when the terminal equipment 1 calculates the equalization coefficient:
- y data 1,4 ⁇ 1 H 1,4 ⁇ 64 P 1,64 ⁇ 2 s data 1,2 ⁇ 1 +H 1,4 ⁇ 64 P 2,64 ⁇ 2 s data 2,2 ⁇ 1 +n 4 ⁇ 1
- the terminal device 1 determines the product of W 1,2 ⁇ 4 and y data 1,4 ⁇ 1 as the data symbol in the detected real data stream.
- the base station sends P 1, 64 ⁇ 2 and P 2, 64 ⁇ 2 to terminal device 1.
- terminal device 1 calculates the equalization coefficient:
- the network device sends both the DCI for scheduling the real data stream and the virtual data stream to the first terminal device, and sends the downlink reference signal for demodulating the real data stream to the first terminal device, and the terminal device can directly decode the DCI of the real data stream and the virtual data stream.
- the terminal device can directly decode the DCI of the real data stream and the virtual data stream.
- Call out the data of the interference flow so as to directly suppress the interference and improve the interference suppression capability of the terminal device, so that the SINR of the signal to interference plus noise ratio (signal to interference plus noise ratio) when each data stream of the terminal device is received increases, thereby improving the Throughput, improve network performance.
- the initial transmission data may be sent, and the retransmission data may be sent.
- the retransmission data may be sent.
- the network device when the network device sends the retransmitted data, it will use the full bandwidth to send the retransmitted data, and the retransmitted data may not be able to occupy the full bandwidth, resulting in no retransmitted data being sent in the full bandwidth. Some bandwidth resources are wasted.
- an embodiment of the present application provides a DCI transmission method, and the DCI transmission method provided by the embodiment of the present application is applicable to the communication system shown in FIG. 1 .
- the first terminal device receives a third DCI and a fourth DCI
- the third DCI indicates time domain resources and frequency domain resources used for transmitting retransmission data
- the fourth DCI indicates a time domain resource used for transmitting initial transmission
- the time domain resources and frequency domain resources of the data, the time domain resources indicated by the third DCI are the same as the time domain resources indicated by the fourth DCI, and the frequency domain resources indicated by the third DCI are the same as those indicated by the fourth DCI
- the frequency domain resources are different; the first terminal device receives retransmission data on the time domain resources and frequency domain resources indicated by the third DCI, and receives the initial transmission on the time domain resources and frequency domain resources indicated by the fourth DCI data, the first terminal device can receive the retransmission data and the initial transmission data at the same time, thereby avoiding resource waste. Referring to
- the network device sends the third DCI and the fourth DCI
- the first terminal device receives the third DCI and the fourth DCI
- the third DCI indicates the time domain resource and the frequency domain resource for transmitting the retransmission data
- the fourth DCI indicates the time domain resources and frequency domain resources used for transmitting initial transmission data
- the time domain resources indicated by the third DCI are the same as the time domain resources indicated by the fourth DCI
- the time domain resources indicated by the third DCI are the same.
- the frequency domain resources are different from the frequency domain resources indicated by the fourth DCI.
- the third DCI includes information on time-domain resources and frequency-domain resources for transmitting retransmission data
- the fourth DCI includes information on time-domain resources and frequency-domain resources for transmitting initial transmission data
- the network device may allocate part of the frequency domain resources on the same time domain resource for retransmission data of the first terminal device, and select a part of the frequency domain resources for the retransmission data of the first terminal device.
- a third DCI suitable for retransmission data is determined, and a part of the frequency domain is allocated for the initially transmitted data of the first terminal device, and a fourth DCI suitable for the initially transmitted data is selected for this part of the frequency domain.
- the first subband is allocated to transmit retransmission data
- the second subband is allocated to transmit initial transmission data
- the frequency domain resources of the first subband and the second subband are different.
- the time domain resource may be a time slot.
- the third DCI is different from the fourth DCI, and the first subband and the second subband do not overlap, that is, the frequency domain resources of the first subband and the second subband are different.
- the network device sends retransmission data on the time domain resources and frequency domain resources indicated by the third DCI, and sends initial transmission data on the time domain resources and frequency domain resources indicated by the fourth DCI
- the first terminal device receives retransmission data on the time domain resources and frequency domain resources indicated by the third DCI, and receives initial transmission data on the time domain resources and frequency domain resources indicated by the fourth DCI.
- Sending the retransmission data and the initial transmission data by the network device on the same time domain resource can be regarded as sending the retransmission data and the initial transmission data at the same time.
- the network device may execute S402 to simultaneously send retransmission data and initial transmission data under the following conditions:
- Condition 1 The network device determines to send retransmission data and initial transmission data simultaneously according to the set first subband and second subband.
- Condition 2 If the retransmission data or the initial transmission data cannot occupy the full bandwidth, the network device can send the retransmission data and the initial transmission data at the same time.
- the third DCI may further include indication information of retransmission data.
- the fourth DCI may further include indication information of the initially transmitted data.
- the horizontal axis is the time slot sequence number
- the vertical axis is the frequency domain resources
- the white box is the data that is scheduled for initial transmission and does not need to be retransmitted
- the black box is the data that needs to be retransmitted.
- Data the shaded box is the data that is retransmitted and does not need to be retransmitted.
- Acknowledgment (ACK) indicates that the network device receives information that certain data fed back by the terminal device does not need to be retransmitted
- NACK non-acknowledgment
- the network device confirms that a certain initial data transmission fails and needs to be retransmitted, the network device uses the same time slot (the time slot sequence number in the figure is 8), according to DCI1 sends retransmission data (that is, the initial data of the transmission failure), and sends other initial transmission data (different from the initial data of the transmission failure) according to DCI0, and DCI0 and DCI1 are different.
- the network device can send the retransmission data and the initial transmission data on the same time slot to avoid waste of resources, and can improve the flexibility of the retransmission data and the initial transmission data in selecting DCI, and improve the selection of DCI data. Flexibility on slots and subbands to improve throughput and network performance.
- the data in the full bandwidth schedules the same DCI or avoids the interference bandwidth, but in the actual scenario, due to the complexity of the multipath propagation characteristics and the complexity of the interference situation, the SINR corresponding to each data stream and each subband is The difference can reach 10 to 20 decibels (dB) or even higher, and the SINR difference is large, resulting in performance loss.
- dB decibels
- the bandwidth of 100M may contain 40M interference subbands.
- an embodiment of the present application provides a DCI transmission method, and the DCI transmission method provided by the embodiment of the present application is applicable to the communication system shown in FIG. 1 .
- the network device sends a fifth DCI and a sixth DCI to the terminal device, the fifth DCI indicates a time slot and a third subband for data transmission, and the sixth DCI indicates a time slot for data transmission and the fourth subband, the time slots indicated by the fifth DCI and the sixth DCI are the same, and the third subband and the fourth subband are different, so that a more suitable DCI is selected for different resources, improving performance.
- the specific flow of the DCI transmission method may include:
- the network device divides the entire bandwidth of the channel between the network device and the terminal device into at least two subbands, and different subbands suffer from different degrees of interference.
- the network device may divide the full bandwidth into multiple subbands according to different interference degrees, and the interference degrees of different subbands are different.
- the full bandwidth is the entire bandwidth of the channel between the network device and the terminal device.
- the full bandwidth refers to the full bandwidth of the terminal device, which depends on the hardware module of the terminal device and the bandwidth allocated by the network device for data transmission to the terminal device, that is to say, different
- the full bandwidth of the end device may vary.
- the network equipment allocates different DCIs for different subbands.
- the at least two subbands include a third subband and a fourth subband, the third subband and the fourth subband suffer from different degrees of interference, and the network device allocates the third subband to the third subband
- Five DCIs that is, the fifth DCI includes the information of the third subband used for data transmission
- the network device allocates the sixth DCI to the fourth subband, that is, the sixth DCI includes the information of the third subband used for transmitting data Information on the fourth subband.
- the third subband is a subband that suffers from greater interference
- the fourth subband is a subband that suffers less interference.
- the network device sends a fifth DCI and/or a sixth DCI to the terminal device, where the fifth DCI indicates a time slot and a third subband for data transmission, and the sixth DCI indicates a time slot for data transmission and the fourth subband.
- the time slots indicated by the fifth DCI and the sixth DCI are the same. It can be understood that the time slots indicated by the fifth DCI and the sixth DCI are the same, and the time domain resources indicated by the fifth DCI and the time domain resources indicated by the sixth DCI are the same or different.
- the third subband and the fourth subband are different, and the interference levels of the third subband and the fourth subband are different.
- the network device may allocate a subband to the terminal device, and the subband allocated by the network device to the terminal device may be located in the frequency domain range of the third subband, or may be located in the In the frequency domain range of the fourth subband, a part may be located in the frequency domain range of the third subband, and another part may be located in the frequency domain range of the fourth subband.
- the network device may send the DCI indicating the subband to the terminal device according to the subband allocated to the terminal device. For example, if the subband allocated by the network device to the terminal device is within the frequency domain of the third subband, the network device sends the fifth DCI to the terminal device; if the network device is the The subband allocated by the terminal device is located in the frequency domain range of the fourth subband, and the network device sends the sixth DCI to the terminal device; if a part of the subband allocated by the network device for the terminal device is located in the is within the frequency domain range of the third subband, and another part is within the frequency domain range of the fourth subband, the network device sends the fifth DCI and the sixth DCI to the terminal device.
- the network device may send the fifth DCI and the sixth DCI to the terminal device.
- the terminal device can demodulate data transmitted on different subbands, thereby improving the detection capability and flexibility of the terminal device.
- S603 The network device sends data on the first subband and sends data on the second subband.
- the terminal device receives data on the first subband and/or transmits data on the second subband.
- the network device may send on the third subband data, the terminal device receives data on the third subband.
- the terminal device may also demodulate the received data according to the fifth DCI. For example, if the subband allocated to the terminal device is in the third subband that suffers from greater interference, the network device may select DCI0 according to the third subband that suffers from greater interference, and use DCI0 to schedule data, and the terminal device may The data received on the third subband is demodulated based on DCIO.
- the network device may be on the fourth subband data is sent, and the terminal device receives data on the fourth subband.
- the terminal device may also demodulate the received data according to the sixth DCI. For example, the subband allocated to the terminal device is in the fourth subband with less interference, the network device may select DCI1 according to the fourth subband with less interference, and use DCI1 to schedule data, the terminal device may The data received on the fourth subband is demodulated based on DCI1.
- the network device may send data on the third subband and send data on the fourth subband.
- the bandwidth allocated to the terminal device spans the third subband that suffers from greater interference and the fourth subband that suffers less interference, and the network device schedules data according to using DCI0 and DCI1, and the terminal device may Support dual DCI detection respectively, use DCI0 to demodulate the data on the third subband with greater interference, and use DCI1 to demodulate the data on the fourth subband with less interference.
- the following description will be given with reference to the schematic diagram of time-frequency domain resources occupied during data transmission.
- the entire bandwidth of the channel between the network device and the first terminal device is divided into disturbed subbands and undisturbed subbands.
- the network device schedules data of the full bandwidth based on a specific single DCI (eg, DCI0).
- the network device schedules the data of the undisturbed subband based on a specific single DCI (eg, DCI0), and no data transmission is performed on the disturbed subband.
- the network device schedules the data of the disturbed subband based on DCI0, and schedules the data of the undisturbed subband based on DCI1.
- the network device may also select appropriate DCIs for different subbands according to different interference levels of the subbands, and different DCIs include different modulation and coding strategy (modulation and coding scheme, MCS) information, such as A smaller MCS can be selected for the subbands with a greater degree of interference, and a larger MCS can be selected for the subbands with a smaller interference degree.
- MCS modulation and coding scheme
- the network device selects the MCS order for each subband to better match the SINR of each data stream. It is ensured that the bit error rate of the selected MCS meets the bit error rate target when the corresponding subband is transmitted, and is more in line with the actual transmission requirements, thereby improving the throughput rate and network performance.
- the embodiments of the present application may be applicable to multi-stream transmission in SU scenario, multi-stream transmission in MU scenario, simultaneous transmission of retransmission data and initial transmission data of a single user in SU/MU scenario, and reception of single user in SU/MU scenario Data in multiple subbands with different interference levels are transmitted simultaneously.
- WiFi wireless fidelity
- URLLC ultra-reliable low-latency communication
- MTC machine-type communication
- the embodiment of the present application further provides a DCI transmission device, as shown in FIG. 8 , the
- the apparatus 800 includes a processing unit 801 and a transceiving unit 802, and the apparatus 800 can be used to implement the methods described in the foregoing method embodiments applied to terminal equipment or network equipment.
- the terminal equipment includes a first terminal equipment.
- the apparatus 800 is applied to a terminal device, such as a first terminal device.
- the transceiver unit 802 is configured to receive a first DCI and a second DCI, the first DCI is used to schedule the first data stream of the first terminal device, and the second DCI is used to schedule the second terminal device the second data stream, the second data stream interferes with the first data stream;
- the processing unit 801 is configured to demodulate the first data stream according to the first DCI and the second DCI.
- the processing unit 801 when demodulating the first data stream according to the first DCI and the second DCI, is specifically configured to perform channel estimation according to the first downlink reference signal of the first DCI , obtain a first channel estimation result; perform channel estimation according to the second downlink reference signal of the second DCI to obtain a second channel estimation result; demodulate according to the first channel estimation result and the second channel estimation result the first data stream.
- the apparatus 800 is applied to a network device.
- the processing unit 801 is configured to determine a first DCI and a second DCI, where the first DCI is used to schedule the first data stream of the first terminal device, and the second DCI is used to schedule the second terminal device the second data stream, the second data stream interferes with the first data stream;
- the transceiver unit 802 is configured to send the first DCI and the second DCI to the first terminal device; send the first data stream to the first terminal device; send the first data stream to the second terminal device. Two data streams.
- the transceiver unit 802 is further configured to send the first downlink reference signal of the first DCI and the second downlink reference signal of the second DCI; the first downlink reference signal and the second downlink reference signal for demodulating the first data stream.
- the processing unit 801 is further configured to determine a second data stream that interferes with the first data stream before the transceiver unit sends the first DCI and the second DCI to the first terminal device .
- the apparatus 800 is applied to a terminal device, such as a first terminal device.
- the transceiver unit 802 is configured to receive a first DCI and a second DCI, the first DCI indicates a time domain resource and a frequency domain resource used for transmitting retransmission data, and the second DCI indicates a time domain resource used for transmission
- the time domain resources and frequency domain resources of the initial transmission data, the time domain resources indicated by the first DCI and the time domain resources indicated by the second DCI are the same, and the frequency domain resources indicated by the first DCI are the same as the second DCI.
- the frequency domain resources indicated by the DCI are different; the retransmission data is received on the time domain resources and frequency domain resources indicated by the first DCI, and the initial transmission data is received on the time domain resources and frequency domain resources indicated by the second DCI data;
- the processing unit 801 is configured to determine retransmission data and initial transmission data.
- the apparatus 800 is applied to a network device.
- the processing unit 801 is configured to determine a first DCI and a second DCI, where the first DCI indicates a time domain resource and a frequency domain resource used for transmitting retransmission data, and the second DCI indicates a time domain resource used for transmission
- the time domain resources and frequency domain resources of the initial transmission data, the time domain resources indicated by the first DCI and the time domain resources indicated by the second DCI are the same, and the frequency domain resources indicated by the first DCI are the same as the second DCI.
- the frequency domain resources indicated by the DCI are different;
- the transceiver unit 802 is configured to send a first DCI and a second DCI; send retransmission data on the time domain resources and frequency domain resources indicated by the first DCI, and send retransmission data on the time domain resources indicated by the second DCI and frequency domain resources, the initial transmission data is sent.
- the apparatus 800 is applied to a network device.
- the processing unit 801 is configured to determine a first DCI and a second DCI, where the first DCI indicates a time slot and a first subband for transmitting data, and the second DCI indicates a A time slot and a second subband, the time slots indicated by the first DCI and the second DCI are the same, and the first subband and the second subband are different;
- the transceiver unit 802 is configured to send the first DCI and the second DCI; send first data on the first subband, and send second data on the second subband.
- the first subband and the second subband suffer from different degrees of interference.
- each functional unit in each embodiment of the present application It can be integrated in one processing unit, or it can exist physically alone, or two or more units can be integrated in one unit.
- the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
- the integrated unit if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium.
- the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .
- an embodiment of the present application further provides a schematic structural diagram of a DCI transmission apparatus 900 .
- the apparatus 900 may be configured to implement the methods described in the foregoing method embodiments applied to terminal equipment or network equipment, and reference may be made to the descriptions in the foregoing method embodiments.
- the apparatus 900 may be in a terminal device or a network device or be a terminal device or a network device.
- the terminal equipment includes a first terminal equipment.
- the apparatus 900 includes one or more processors 901 .
- the processor 901 may be a general-purpose processor or a special-purpose processor, or the like.
- it may be a baseband processor, or a central processing unit.
- the baseband processor may be used to process communication protocols and communication data
- the central processing unit may be used to control devices (eg, base stations, terminals, or chips, etc.), execute software programs, and process data of software programs.
- the apparatus may include a transceiving unit for implementing signal input (reception) and output (transmission).
- the transceiver unit may be a transceiver, a radio frequency chip, or the like.
- the apparatus 900 includes one or more of the processors 901, and the one or more processors 901 can implement the method of the first terminal device or the network device in the above-mentioned embodiment.
- processor 901 may also implement other functions in addition to implementing the methods in the above-described embodiments.
- the processor 901 may execute an instruction, so that the apparatus 900 executes the method described in the foregoing method embodiments.
- the instructions may be stored in whole or in part in the processor, such as instruction 903, or may be stored in whole or in part in a memory 902 coupled to the processor, such as instructions 904, or may be jointly caused by instructions 903 and 904.
- the apparatus 900 executes the methods described in the above method embodiments.
- the DCI transmission apparatus 900 may also include a circuit, and the circuit may implement the function of the first terminal device or the network device in the foregoing method embodiments.
- the apparatus 900 may include one or more memories 902 having stored thereon instructions 904 that may be executed on the processor to cause the apparatus 900 to perform the above-described method methods described in the examples.
- data may also be stored in the memory.
- Instructions and/or data may also be stored in the optional processor.
- the one or more memories 902 may store the correspondences described in the foregoing embodiments, or related parameters or tables involved in the foregoing embodiments, and the like.
- the processor and the memory can be provided separately or integrated together.
- the apparatus 900 may further include a transceiver 905 and an antenna 906 .
- the processor 901 may be referred to as a processing unit, and controls an apparatus (terminal or base station).
- the transceiver 905 may be referred to as a transceiver, a transceiver circuit, or a transceiver unit, etc., and is used to implement the transceiver function of the device through the antenna 906 .
- the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
- each step of the above method embodiment may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
- the above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA), or other possible solutions.
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA field programmable gate array
- Programming logic devices discrete gate or transistor logic devices, discrete hardware components.
- a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
- the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
- the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
- the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
- the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
- the non-volatile memory can be read only memory (ROM), programmable read only memory (programmable ROM, PROM), erasable programmable read only memory (erasable PROM, EPROM), electrically erasable programmable read only memory Read memory (electrically EPROM, EEPROM) or flash memory.
- Volatile memory may be random access memory (RAM), which acts as an external cache.
- RAM random access memory
- DRAM dynamic random access memory
- SDRAM synchronous DRAM
- SDRAM double data rate synchronous dynamic random access memory
- ESDRAM enhanced synchronous dynamic random access memory
- SLDRAM synchronous link dynamic random access memory
- direct rambus RAM direct rambus RAM
- Embodiments of the present application further provide a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, implements the DCI transmission method described in any of the foregoing method embodiments applied to a terminal device or a network device.
- An embodiment of the present application further provides a computer program product, which implements the DCI transmission method described in any of the foregoing method embodiments applied to a terminal device or a network device when the computer program product is executed by a computer.
- the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
- software it can be implemented in whole or in part in the form of a computer program product.
- the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
- the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
- the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.).
- the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media.
- the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks, SSD)) etc.
- An embodiment of the present application further provides a processing apparatus, including a processor and an interface; the processor is configured to execute the DCI transmission method described in any of the foregoing method embodiments applied to a terminal device or a network device.
- the above-mentioned processing device may be a chip, and the processor may be implemented by hardware or software.
- the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software
- the processor may be a general-purpose processor, which is implemented by reading software codes stored in a memory, and the memory may be integrated in the processor or located outside the processor and exist independently.
- An embodiment of the present application further provides a chip, including a logic circuit and an input-output interface, where the input-output interface is used for receiving/outputting code instructions or information, and the logic circuit is used for executing the code instructions or according to the information , so as to execute the DCI transmission method described in any of the above method embodiments applied to a terminal device or a network device.
- the chip can implement the functions shown in the processing unit and/or the transceiver unit in the above embodiments.
- An embodiment of the present application further provides a communication system, including a terminal device or a network device, where the first terminal device is configured to execute the DCI transmission method described in any of the foregoing method embodiments applied to a terminal device, and the network device For executing the DCI transmission method described in any of the above method embodiments applied to a network device.
- the disclosed system, apparatus and method may be implemented in other manners.
- the apparatus embodiments described above are only illustrative.
- the division of units is only a logical function division.
- there may be other division methods for example, multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented.
- the shown or discussed mutual coupling or direct coupling or DCI transmission connection may be indirect coupling or DCI transmission connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
- Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solutions of the embodiments of the present application.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
- the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
- Computer-readable media includes both computer storage media and DCI transmission media including any medium that facilitates transfer of a computer program from one place to another.
- a storage medium can be any available medium that a computer can access.
- computer readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or be capable of carrying or storing instructions or data structures in the form of desired program code and any other medium that can be accessed by a computer. also.
- any connection can be appropriately made into a computer-readable medium.
- the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
- the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fusing of the pertinent medium.
- Disk and disc includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and blu-ray disc, where disks generally reproduce data magnetically, and discs Lasers are used to optically copy data. Combinations of the above should also be included within the scope of computer-readable media.
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- Mobile Radio Communication Systems (AREA)
Abstract
一种DCI传输方法、装置、芯片及***,用于消除各用户之间数据传输存在的干扰,提升性能,满足多DCI的传输场景。该DCI传输方法包括:第一终端设备接收第一DCI和第二DCI,所述第一DCI用于调度第一终端设备的第一数据流,所述第二DCI用于调度第二终端设备的第二数据流,所述第二数据流对所述第一数据流造成干扰;所述第一终端设备可以根据第一DCI和第二DCI解调第一数据流。
Description
本申请涉及无线通信技术领域,尤其涉及一种DCI传输方法、装置、芯片及***。
现有通信场景中存在单用户(single user,SU)场景和多用户(multi user,MU)场景,在MU配对的部分场景中,各用户之间的数据传输会存在干扰,造成性能损失。
网络设备在发送不同的数据流时,数据流对应的发送权值和下行参考信号有所区别,因此现有技术中网络设备可以选择特定的发送权值来发送不同的数据流,来消除各用户之间的干扰,由于发送权值之间需要互相避让,就会导致网络设备的发送功率损失大,造成性能损失。另外,当信道频选、时变严重时,基于信息选取发送权值时会不准确,因此选定的发送权值对应的不同用户的数据流之间残余干扰很难消除,也会造成性能损失。并且网络设备如果使用预先给定的码本集选择发送权值,也会存在数据流之间残余干扰很难消除,造成性能损失的问题。
可见,现有技术中各用户之间的数据传输存在干扰,造成性能损失。
发明内容
本申请实施例提供一种下行控制信息(downlink control information,DCI)传输方法、装置、芯片及***,用以消除各用户之间数据传输存在的干扰,提升性能,满足多DCI的传输场景。
第一方面,本申请实施例提供一种DCI传输方法,包括:网络设备发送第一DCI和第二DCI,第一终端设备接收所述第一DCI和所述第二DCI,所述第一DCI用于调度所述第一终端设备的第一数据流,所述第二DCI用于调度第二终端设备的第二数据流DCI,所述第二数据流对所述第一数据流造成干扰。
所述第一DCI可以调度一个或多个第一数据流。
第二DCI为一个或多个,对应的,第二终端设备为一个或多个。每个第二DCI可以调度一个或多个第二数据流。
网络设备向第一终端设备发送所述第一终端设备自身的第一DCI和对所述第一终端设备造成干扰的第二DCI,所述第一终端设备可以根据第一DCI和第二DCI,直接解调出发送给所述第一终端设备自身的第一数据流,从而可以直接抑制干扰,提升终端设备的干扰抑制能力,消除各终端设备之间数据传输存在的干扰,提升网络性能。可选的,还可以根据第一DCI和第二DCI,解调出对所述第一终端设备造成干扰的第二数据流,以进一步提升终端设备的干扰抑制能力。
在一种可能的实现中,所述网络设备还可以向第一终端设备发送所述第一DCI的第一下行参考信号,和所述第二DCI的第二下行参考信号。所述第一终端设备可以接收第一下行参考信号和至少一个第二下行参考信号,所述第一下行参考信号和所述第二下行参考信号用于解调第一数据流。可选的,所述第一下行参考信号和所述第二下行参考信号还可以用于解调第二数据流。
在该实现中,网络设备通过向第一终端设备下发第一下行参考信号和第二下行参考信号,可以保证第一终端设备尽可能准确地估计出与网络设备之间的信道,从而尽可能准确地解调出接收到的数据流,提升网络性能。
在一种可能的实现中,所述第一终端设备可以根据所述第一DCI的第一下行参考信号,进行信道估计,得到第一信道估计结果;所述第一终端设备还可以根据所述第二DCI的第二下行参考信号,进行信道估计,得到第二信道估计结果。
在该实现中,所述第一终端设备根据第一下行参考信号和第二下行参考信号,可以尽可能准确地估计出与网络设备之间的信道,从而尽可能准确地解调出接收到的数据流,提升网络性能。
在一种可能的实现中,所述网络设备可以向所述第一终端设备发送第一数据流,向所述第二终端设备发送第二数据流。所述第一终端设备接收第一数据流,并且由于第二数据流对所述第一数据流造成干扰,所述第一终端设备还可能接收到第二数据流。
在该实现中,所述第一终端设备可以根据第一DCI和第二DCI,直接解调出发送给所述第一终端设备自身的第一数据流,从而可以直接抑制干扰,消除各终端设备之间数据传输存在的干扰,提升网络性能。并且可选的,还可以根据第一DCI和第二DCI,解调出对造成干扰的第二数据流,以进一步提升终端设备的干扰抑制能力。
在一种可能的实现中,所述第一终端设备根据所述第一DCI和所述第二DCI解调第一数据流,包括:
所述第一终端设备可以根据所述第一信道估计结果和所述第二信道估计结果解调所述第一数据流。
在该实现中,所述第一终端设备可以根据信道估计结果,尽可能准确地解调出接收到的数据流,提升网络性能。
在一种可能的实现中,所述网络设备发送第一DCI和第二DCI之前,所述网络设备还可以确定对所述第一数据流造成干扰的第二数据流。
在该实现中,所述网络设备通过确定对第一数据流造成干扰的第二数据流,从而将第一数据流对应的第一DCI和造成干扰的第二DCI发送给所述第一终端设备,保证所述第一终端设备能够正确解调出第一数据流,消除第二数据流对第一数据流的干扰。
第二方面,本申请实施例提供一种DCI传输方法,包括网络设备发送第一DCI和第二DCI,第一终端设备接收所述第一DCI和所述第二DCI,所述第一DCI指示用于传输重传数据的时域资源和频域资源,所述第二DCI指示用于传输初传数据的时域资源和频域资源,所述第一DCI指示的时域资源和所述第二DCI指示的时域资源相同,所述第一DCI指示的频域资源和所述第二DCI指示的频域资源不同;
所述网络设备在所述第一DCI指示的时域资源和频域资源上,发送重传数据,在所述第二DCI指示的时域资源和频域资源上,发送初传数据。所述第一终端设备在所述第一DCI指示的时域资源和频域资源上,接收重传数据,在所述第二DCI指示的时域资源和频域资源上,接收初传数据。
网络设备在发送重传数据时,会采用全带宽发送该重传数据,但是重传数据可能无法占满全带宽,就导致全带宽中不发送重传数据的部分带宽资源被浪费,本申请实施例中,网络设备可以在同一时域资源上实现重传数据和初传数据的同时发送,避免资源浪费,提 高吞吐率和网络性能。
在一种可能的实现中,所述网络设备发送第一DCI和第二DCI之前,所述网络设备还可以将所述网络设备与第一终端设备之间信道的整个带宽划分为第一子带和第二子带;所述网络设备为所述第一子带分配重传数据的第一DCI,为所述第二子带分配初传数据的第二DCI。所述第一子带为用于传输重传数据的频域资源,所述第二子带为用于传输初传数据的频域资源。
在该实现中,网络设备通过为重传数据和初传数据分配不同的DCI,可以实现同时发送重传数据和初传数据,避免资源浪费。
第三方面,本申请实施例提供一种DCI传输方法,包括:网络设备向终端设备发送第一DCI和第二DCI,所述第一DCI指示用于传输数据的时隙和第一子带,所述第二DCI指示用于传输数据的时隙和第二子带,所述第一DCI和所述第二DCI指示的时隙相同,所述第一子带和所述第二子带不同;所述网络设备在所述第一子带上发送第一数据,在所述第二子带上发送第二数据。所述终端设备可以在所述第一子带上接收所述第一数据,和/或在所述第二子带上接收所述第二数据。
所述第一DCI和所述第二DCI指示的时隙相同时,所述第一DCI和所述第二DCI指示的时频资源相同或不同。
在一种可能的实现中,所述第一子带与所述第二子带受干扰程度不同。
如果网络设备为终端设备分配的带宽位于干扰较大的子带,则依据干扰较大的子带选取对应的DCI,如果网络设备为终端设备分配的带宽位于干扰较小的子带,则依据干扰较小的子带选取对应的DCI,如果网络设备为终端设备分配的带宽横跨了干扰较大的子带和干扰较小的子带,则同时使用干扰较大的子带对应的DCI和干扰较小的子带对应的DCI进行数据的发送,对应的,终端设备同时使用干扰较大的子带对应的DCI和干扰较小的子带对应的DCI解调数据。
第四方面,本申请实施例提供一种DCI传输装置/通信装置,所述装置具有实现上述方法实施例中的终端设备或网络设备的功能。这些功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的功能模块。所述终端设备包括第一终端设备。
第五方面,本申请实施例提供一种DCI传输装置/通信装置,该装置可以为上述方法实施例中的终端设备或网络设备,或者为设置在终端设备或网络设备中的芯片,该通信装置包括收发器以及处理器,可选的,还包括存储器,其中,该存储器用于存储计算机程序或指令,处理器分别与存储器、收发器耦合,当处理器执行所述计算机程序或指令时,使通信装置执行上述方法实施例中由终端设备或网络设备所执行的方法。
第六方面,本申请实施例提供一种计算机程序产品,所述计算机程序产品包括:计算机程序代码,当所述计算机程序代码在计算机上运行时,使得计算机执行上述任一方面所述的方法。
第七方面,本申请实施例提供一种芯片***,该芯片***包括处理器和存储器,所述处理器、所述存储器之间电耦合;所述存储器,用于存储计算机程序指令;所述处理器,用于执行所述存储器中的部分或者全部计算机程序指令,当所述部分或者全部计算机程序 指令被执行时,用于实现上述任一方面所述的方法。
在一种可能的设计中,所述芯片***还包括收发器,所述收发器,用于发送所述处理器处理后的信号,或者接收信号输入给所述处理器。该芯片***,可以由芯片构成,也可以包括芯片和其他分立器件。
第八方面,本申请实施例提供一种计算机可读存储介质,该计算机可读存储介质存储有计算机程序,当该计算机程序被运行时,实现上述任一方面所述的方法。
第九方面,本申请实施例提供一种通信***,该***可以包括执行上述任一方面所述方法的(第一)终端设备、以及执行上述任一方面所述方法的网络设备。
上述第四方面至第九方面中任一方面及其任一方面中任意一种可能的实现可以达到的技术效果,请参照上述第一方面、第二方面或第三方面可以带来的技术效果描述,这里不再重复赘述。
图1为本申请实施例中适用的一种网络***的架构图;
图2、图3、图4、图6为本申请实施例中适用的一种DCI传输的流程示意图;
图5、图7为本申请实施例中适用的数据传输占用时频域资源的示意图;
图8、图9为本申请实施例中适用的一种DCI传输装置结构图。
下面将结合附图对本发明作进一步地详细描述。
本申请将围绕可包括多个设备、组件、模块等的***来呈现各个方面、实施例或特征。应当理解和明白的是,各个***可以包括另外的设备、组件、模块等,并且/或者可以并不包括结合附图讨论的所有设备、组件、模块等。此外,还可以使用这些方案的组合。
另外,在本申请实施例中,“示例的”一词用于表示作例子、例证或说明。本申请中被描述为“示例”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言,使用示例的一词旨在以具体方式呈现概念。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案,并不构成对于本申请实施例提供的技术方案的限定,本领域普通技术人员可知,随着网络架构的演变和新业务场景的出现,本申请实施例提供的技术方案对于类似的技术问题,同样适用。
以下对本申请实施例的部分用语进行解释说明,以便于本领域技术人员理解。
1)终端设备,包括向用户提供语音和/或数据连通性的设备,具体的,包括向用户提供语音的设备,或包括向用户提供数据连通性的设备,或包括向用户提供语音和数据连通性的设备。例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network,RAN)与核心网进行通信,与RAN交换语音或数据,或与RAN交互语音和数据。该终端设备可以包括用户设备(user equipment,UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device,D2D)终端设备、车到一切(vehicle to everything,V2X)终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications,M2M/MTC)终端设备、物联网(internet of things,IoT)终端设备、轻型终端设备(light UE)、订户单元(subscriber unit)、订户站(subscriber station),移动站(mobile station)、远程站(remote station)、接入点(access point,AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如,可以包括移动电话(或称为“蜂窝”电话),具有移动终端设备的计算机,便携式、袖珍式、手持式、计算机内置的移动装置等。例如,个人通信业务(personal communication service,PCS)电话、无绳电话、会话发起协议(session initiation protocol,SIP)话机、无线本地环路(wireless local loop,WLL)站、个人数字助理(personal digital assistant,PDA)、等设备。还包括受限设备,例如功耗较低的设备,或存储能力有限的设备,或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification,RFID)、传感器、全球定位***(global positioning system,GPS)、激光扫描器等信息传感设备。
作为示例而非限定,在本申请实施例中,该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等,是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称,如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上,或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备,更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能,例如:智能手表或智能眼镜等,以及只专注于某一类应用功能,需要和其它设备如智能手机配合使用,如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端设备,如果位于车辆上(例如放置在车辆内或安装在车辆内),都可以认为是车载终端设备,车载终端设备例如也称为车载单元(on-board unit,OBU)。
本申请实施例中,终端设备还可以包括中继(relay)。或者理解为,能够与基站进行数据通信的都可以看作终端设备。
本申请实施例中,用于实现终端设备的功能的装置可以是终端设备,也可以是能够支持终端设备实现该功能的装置,例如芯片***,该装置可以被安装在终端设备中。本申请实施例中,芯片***可以由芯片构成,也可以包括芯片和其他分立器件。本申请实施例提供的技术方案中,以用于实现终端的功能的装置是终端设备为例,描述本申请实施例提供的技术方案。
2)网络设备,例如包括接入网(access network,AN)设备,例如基站(例如,接入点或传输点),可以是指接入网中在空口通过一个或多个小区与无线终端设备通信的设备,或者例如,一种车到一切(vehicle-to-everything,V2X)技术中的网络设备为路侧单元(road side unit,RSU)。基站可用于将收到的空中帧与IP分组进行相互转换,作为终端设备与接入网的其余部分之间的路由器,其中接入网的其余部分可包括IP网络。RSU可以是支持V2X应用的固定基础设施实体,可以与支持V2X应用的其他实体交换消息。网络设备还可协调对空口的属性管理。例如,网络设备可以包括长期演进(long term evolution,LTE)***或高级长期演进(long term evolution-advanced,LTE-A)中的演进型基站(NodeB或eNB或e-NodeB,evolutional Node B),或者也可以包括第五代移动通信技术(the 5th generation,5G)NR***(也简称为NR***)中的下一代节点B(next generation node B,gNB)或者也可以包括云接入网(cloud radio access network,Cloud RAN)***中的集中式单元(centralized unit,CU)和分布式单元(distributed unit,DU),或者可以是未来的 通信***中承载网络设备功能的装置,本申请实施例并不限定。
网络设备还可以包括核心网设备。核心网设备例如包括访问和移动管理功能(access and mobility management function,AMF)或用户面功能(user plane function,UPF)等。
网络设备还可以是设备到设备(device to device,D2D)通信、机器到机器(machine to machine,M2M)通信、车联网、或卫星通信***中承载网络设备功能的装置。
3)本申请实施例中的术语“***”和“网络”可被互换使用。“至少一个(种)”是指一个(种)或者多个(种),“多个(种)”是指两个(种)或两个(种)以上。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B的情况,其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达,是指的这些项中的任意组合,包括单项(个)或复数项(个)的任意组合。例如,a,b,或c中的至少一项(个),可以表示:a,b,c,a-b,a-c,b-c,或a-b-c,其中a,b,c可以是单个,也可以是多个。
以及,除非有相反的说明,本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分,不用于限定多个对象的顺序、时序、优先级或者重要程度。例如,第一数据包和第二数据包,只是为了区分不同的数据包,而并不是表示这两个数据包的内容、优先级、发送顺序或者重要程度等的不同。又如,第一DCI、第二DCI、第三DCI、第四DCI、第五DCI和第六DCI,只是用于区别不同的DCI,可以理解,这里对在不同实施例中涉及的第一DCI/第二DCI是否相同不做限定。又如,第一子带、第二子带、第三子带和第四子带,也只是为了区分不同的子带,这里对不同实施例中涉及的第一子带/第二子带是否相同不做限定。
本申请实施例提供的通信方法可以应用于各类通信***中,例如,卫星通信***、物联网(internet of things,IoT)、窄带物联网(narrow band internet of things,NB-IoT)***、全球移动通信***(global system for mobile communications,GSM)、增强型数据速率GSM演进***(enhanced data rate for GSM evolution,EDGE)、宽带码分多址***(wideband code division multiple access,WCDMA)、码分多址2000***(code division multiple access,CDMA2000)、时分同步码分多址***(time division-synchronization code division multiple access,TD-SCDMA),长期演进***(long term evolution,LTE)、第五代(5G)通信***,例如5G新无线(new radio,NR),以及5G移动通信***的三大应用场景增强型移动带宽(enhanced mobile broadband,eMBB),超可靠、低时延通信(ultra reliable low latency communications,uRLLC)和海量机器类通信(massive machine type communications,mMTC),或者还可以是其他的或者未来的通信***。
为了便于理解本申请实施例,以图1所示的网络架构对本申请实施例所使用的应用场景进行说明,该网络架构可以应用于上述各类通信***。图1所示的网络架构中包括网络设备和终端设备,所述网络设备的数量可以为一个或多个,所述终端设备的数量可以为一个或多个(如图1所示为两个终端设备),在本申请实施例中对网络设备和终端设备的类型和数量均不做限定。
所述网络设备还可以理解为下行发送传输点。所述网络设备可以实现下行资源的调度,可选的,所述网络设备中的下行资源调度模块可以向所述终端设备下发DCI及DCI对应的 数据流。所述DCI对应的数据流指DCI调度的数据流。
所述终端设备可以接收下行调度信息,例如,所述终端设备中的接收机模块可以接收下行调度信息。此外,所述终端设备还可以实现信道估计、信道均衡、信号/信息解调等功能。可以理解的是,一个终端设备对应一个(调度)用户,因此在本申请实施例中终端设备和(调度)用户的概念可以交替使用。
一般的,所述终端设备根据DCI的指示,对接收到的数据流进行解调,从而实现业务。但是现有技术中的DCI传输过程中存在以下问题。
问题一:
现有通信场景中存在SU场景和MU场景,在MU配对的部分场景中,各用户之间的数据传输会存在干扰,造成性能损失。
网络设备在发送不同的数据流时,数据流对应的发送权值和下行参考信号有所区别,因此现有技术中网络设备可以选择特定的发送权值来发送不同的数据流,来消除各用户之间的干扰,由于发送权值之间需要互相避让,即需要发送权值之间需要保持不同,就会导致网络设备的发送功率损失大,造成性能损失。另外,当信道频选、时变严重时,基于信息选取发送权值时会不准确,因此选定的发送权值对应的不同用户的数据流之间残余干扰很难消除,也会造成性能损失。并且网络设备如果使用预先给定的码本集选择发送权值,也会存在数据流之间残余干扰很难消除,造成性能损失的问题。
基于此,本申请实施例提供一种DCI传输方法,本申请实施例提供的DCI传输方法适用于如图1所示的通信***。该方法中,第一终端设备可以接收所述第一终端设备的第一DCI和其他终端设备的第二DCI,其他终端设备的数据流对第一终端设备的数据流有干扰,第一终端设备可以根据第一DCI和第二DCI对接收到的数据流进行联合检测,检测出所述第一终端设备的数据流,并且可选的检测出其他终端设备的数据流,从而剔除其他终端设备的数据流对所述第一终端设备造成的干扰,提升性能。参阅图2所示,所述DCI传输方法的具体流程可以包括:
S201:网络设备向第一终端设备发送第一DCI和第二DCI,第一终端设备接收所述第一DCI和所述第二DCI,所述第一DCI用于调度所述第一终端设备的第一数据流,所述第二DCI用于调度第二终端设备的第二数据流,所述第二数据流对所述第一数据流造成干扰。
所述第一DCI可以调度一个或多个第二数据流。
第二DCI可以为一个或多个,每个第二DCI也可以调度一个或多个第二数据流。
在该S201之前,所述网络设备还可以确定对第一数据流造成干扰的第二数据流,从而将用于调度第一数据流的第一DCI和用于调度造成干扰的第二数据流的第二DCI发送给所述第一终端设备,保证所述第一终端设备能够正确解调第一数据流,并且可选的解调出造成干扰的第二数据流,从而剔除所述第二数据流对所述第一数据流的干扰。
所述第一数据流和至少一个第二数据流之间存在高相关,即所述至少一个第二数据流为所述第一数据流的高相关流。所述网络设备确定其他数据流是否为第一数据流的高相关流时,可以判断是否满足以下条件:其他终端设备的(下行)发送权值与第一终端设备的(下行)发送权值的相关性是否满足第一数值范围,或者其他终端设备的信道和第一终端设备的信道相同。其中,所述其他终端设备的(下行)发送权值与所述第一终端设备的(下行)发送权值的相关性可以通过一定的算法计算得到,在本申请实施例中对该算法不做限定。
所述第一数据流为所述第一终端设备实际期望接收到的数据流,因此可以认为所述第一数据流为真实数据流,相应的,第一DCI用于调度所述第一数据流,因此可以认为所述第一DCI为真实DCI。所述第二数据流为所述第一终端设备并不期望接收到的、对所述第一数据流造成干扰的数据流,因此可以认为所述第二数据流为虚拟数据流,相应的,第二DCI用于调度所述第二数据流,因此可以认为所述第二DCI为虚拟DCI。也就是说,虽然所述第一终端设备既可以接收到所述第一数据流,又可以接收到所述第二数据流,但是由于所述第一数据流为网络设备真实发送给所述第一终端设备的,所述第二数据流为网络设备真实发送给第二终端设备,但是由于干扰被所述第一终端设备接收到的,因此针对第一终端设备来说,所述第一数据流为真实数据流,所述第二数据流为虚拟数据流。而第一DCI用于调度真实数据流,所述第二DCI用于调度虚拟数据流,因此针对所述第一终端设备来说,所述第一DCI为真实DCI,所述第二DCI为虚拟DCI。
可选的,所述网络设备还可以向所述第一终端设备发送指示信息,指示所述第一DCI用于调度第一数据流,所述第二DCI用于调度造成干扰的第二数据流。也可以理解为,所述指示信息用于指示所述第一DCI为真实DCI,所述第二DCI为虚拟DCI。
在该S201中,所述网络设备可以通过物理下行控制信道(physical downlink control channel,PDCCH)信道或其他方式将所述第一DCI和所述第二DCI发送给所述第一终端设备。
所述网络设备还可以向所述第一终端设备发送所述第一DCI的第一下行参考信号,和所述第二DCI的第二下行参考信号。所述第一下行参考信号和所述第二下行参考信号用于进行信道估计,解调第一数据流。如果所述第二DCI为一个或多个,所述第二下行参考信号也为一个或多个,第二DCI和第二下行参考信号一一对应。在本申请实施例中,下行参考信号可以为解调参考信号(demodulation reference signal,DMRS),或者其他用于信道估计的下行参考信号。
S202:所述网络设备向所述第一终端设备发送第一数据流,向所述第二终端设备发送第二数据流;所述第一终端设备接收所述第一数据流和所述第二数据流。
实际数据发送过程中,所述网络设备向所述第一终端设备仅发送第一数据流,且所述第一终端设备期望仅接收到第一数据流,但是由于第二数据流对第一数据流造成干扰,因此所述网络设备向所述第二终端设备发送第二数据流时,所述第一终端设备实际上还会接收到所述第二数据流,此时所述第一终端设备就需要在接收到的多个数据流中准确解调出第一数据流。
可以理解的是,所述网络设备发送给所述第一终端设备的第一数据流可以为一个或多个数据流,在本申请实施例中仅以所述第一数据流为一个数据流为例进行说明,本申请同样适用于所述第一数据流为多个数据流的场景。
在该S202中,所述网络设备可以通过物理下行共享信道(physical downlink shared channel,PDSCH)或其他方式发送第一数据流和第二数据流,所述第一终端设备可以通过PDSCH信道或其他方式接收所述第一数据流,所述第二终端设备可以通过PDSCH信道或其他方式接收所述第二数据流。
S203:所述第一终端设备根据所述第一DCI和所述第二DCI解调第一数据流。
可选的,所述第一终端设备根据所述第一DCI和所述第二DCI,还可以解调第二数据流。
在该S203中,所述第一终端设备还可以根据第一下行参考信号,进行信道估计,得到第一信道估计结果;根据第二下行参考信号,进行信道估计,得到第二信道估计结果。所述第一终端设备根据所述第一信道估计结果和所述第二信道估计结果解调第一数据流。
可选的,所述第一终端设备根据所述第一信道估计结果和所述第二信道估计结果,解调第二数据流。所述第一终端设备可以直接将解调出的第二数据流作为干扰流,从而可以直接抑制干扰。
如图3所示,以一个具体的实施例来说明DCI传输的交互流程,包括以下步骤:
可选的,S301:基站1选择终端设备1的虚拟数据流。
例如终端设备1的真实数据流包括S1_1,终端设备1的虚拟数据流包括S2_1、S2_2和S3_1。用于调度真实数据流的DCI为真实DCI,用于调度虚拟数据流的DCI为虚拟DCI。
用于调度终端设备1的所述S1_1的真实DCI为DCI1。所述S2_1和S2_2下发给终端设备2,且用于调度终端设备2的所述S2_1和S2_2的虚拟DCI为DCI2。S3_1下发给终端设备3,且用于调度终端设备3的所述S3_1的虚拟DCI为DCI3。
S302:基站1通过PDCCH信道或其他方式将终端设备1的真实DCI和虚拟DCI发送给所述终端设备1。终端设备1接收所述真实DCI和虚拟DCI。
即基站1向终端设备1发送真实DCI(例如DCI1)和虚拟DCI(例如DCI2和DCI3)。
S303:基站1向终端设备1发送所述DCI1的解调参考信号(demodulation reference signal,DMRS)1,所述DCI2的DMRS2,和所述DCI3的DMRS3。所述终端设备1接收DMRS1、DMRS2和DMRS3。
可以理解的是,DMRS1、DMRS2和DMRS3也可以替换成其他用于信道估计的下行参考信号。
可选的,方法还包括S304:终端设备1根据DMRS1进行信道估计,得到第一信道估计结果H1,根据DMRS2进行信道估计,得到第二信道估计结果H2,根据DMRS3进行信道估计,得到第三信道估计结果H3。
H1、H2和H3均为对基站到终端设备1的信道估计结果,H1为基站发送DMRS1到终端设备1的等效信道的信道估计结果,H2为基站发送DMRS2到终端设备1的等效信道的信道估计结果,H3为基站发送DMRS3到终端设备1的等效信道的信道估计结果。
S305:基站1根据终端设备1的发送权值对终端设备1的数据进行加权,将加权后得到的数据S1_1通过PDSCH信道发送给终端设备1,根据终端设备2的发送权值对终端设备2的数据进行加权,将加权后得到的数据S2_1和S2_2通过PDSCH信道发送给终端设备2,根据终端设备3的发送权值对终端设备3的数据进行加权,将加权后得到的数据S3_1通过PDSCH信道发送给终端设备3。终端设备1接收发送给所述终端设备1的S1_1、发送给所述终端设备2的S2_1和S2_2、和发送给所述终端设备3的S3_1。
S2_1和S2_2、S3_1会通过基站到终端设备1的物理信道到达终端设备1,被终端设备1接收到,从而对终端设备1实际想要接收到的S1_1造成干扰。
在本申请实施例中,数据也称数据符号,两者可以替换使用。
可选的,方法还包括S306:终端设备1根据H1、H2、H3和DCI1、DCI2、DCI3,解调出S1_1。
可选的,终端设备1还可以根据H1、H2、H3和DCI1、DCI2、DCI3,解调出S2_1和S2_2、和/或解调出S3_1。
这里以一个场景对该实施例进行说明,该场景下存在以下假设:基站的发送天线数目为64,终端设备1的接收天线数目为4,基站向终端设备1发送DMRS导频符号或数据符号的流数为2,基站向终端设备2发送DMRS导频符号或数据符号的流数为2。即,基站向终端设备1发送2个数据流,向终端设备2发送2个数据流。所述数据符号即为数据流中的数据符号。
所述基站向所述终端设备2发送第二数据流时,会通过所述终端设备2的发送权值对数据符号进行加权,加权后的数据符号会通过基站到终端设备1的物理信道到达所述终端设备1,被所述终端设备1接收到,从而对所述终端设备1产生干扰。
终端设备1可以根据接收到的DMRS导频符号计算均衡系数,然后根据计算得到的均衡系数,在接收到的数据符号中检测出真实数据流中的数据符号。
终端设备1接收到的DMRS导频符号满足下述公式:y
1,4×1=H
1,4×64P
1,64×2s
1,2×1+H
1,4×64P
2,64×2s
2,2×1+n
4×1。其中,y
1为终端设备1接收到DMRS符号,维度为4*1,H
1,4×64为基站到终端设备1的物理信道,维度为4*64,P
1,64×2为基站到终端设备1的加权所使用的发送权值(既用于DMRS导频信号,也用于数据符号),维度为64*2,s
1,2×1为终端设备1的导频符号,维度为2*1,P
2,64×2为基站对终端设备2的加权所使用的发送权值(既用于DMRS导频符号,也用于数据符号),维度64*2,s
2,2×1为终端设备2的导频符号,维度2*1,n
4×1为终端设备1接收到的噪声,维度4*1。H
1P
1s
1是终端设备1想要接收到的真实符号,H
1P
2s
2和n均为干扰。
传统检测方法中,基站将P
1,64×2发送给终端设备1,终端设备1计算均衡系数时:
先对终端设备1的导频符号到终端设备1的等效信道进行信道估计:H
e,1,4×2≈H
1,4×64P
1,64×2;然后对终端设备1接收到的干扰噪声的协方差进行估计:R
1,4×4=(y
1,4×1-H
e,1,4×2s
1,2×1)(y
1,4×1-H
e,1,4×2s
1,2×1)
H;最后计算最小均方误差(minimum mean squared error,MMSE)均衡系数:
假设终端设备1接收到的数据符号为:y
数据1,4×1=H
1,4×64P
1,64×2s
数据1,2×1+H
1,4×64P
2,64×2s
数据2,2×1+n
4×1,终端设备1将W
1,2×4和y
数据1,4×1的乘积确定为检测出的真实数据流中的数据符号。
而本申请中,基站将P
1,64×2和P
2,64×2发送给终端设备1,终端设备1计算均衡系数时:
先对终端设备1的导频符号到终端设备1的等效信道进行信道估计:H
e,1,4×4≈[H
1,4×64P
1,64×2,H
1,4×64P
2,64×2];然后对终端设备1接收到的干扰噪声的协方差进行估计:
为终端设备1接收到的噪声协方差,维度为1*1,I
4×4为单位矩阵;最后计算MMSE均衡系数:
接收终端设备1接收到的数据符号为:y
数据1,4×1=H
1,4×64P
1,64×2s
数据1,2×1+H
1,4×64P
2,64×2s
数据2,2×1+n
4×1,终端设备1取W
1,4×4的前两行(即第一行和第二行)与y
数据1,4×1相乘,将乘积确定为检测出的真实数据流中的数据符号。可选的,终端设备1取W
1,4×4的后两行(即第三行和第四行)与y
数据1,4×1相乘,将乘积确定为检测出的虚拟数据流中的数据符号。
由上述可见,网络设备将调度真实数据流和虚拟数据流的DCI均发送给第一终端设备,以及将用于解调真实数据流的下行参考信号发送给第一终端设备,终端设备可以直接解调出干扰流的数据,从而直接抑制干扰,提升终端设备的干扰抑制能力,使得终端设备的各数据流接收时的信号与干扰加噪声比(signal to interference plus noise ratio)SINR增大,从而提高吞吐率、提升网络性能。
问题二:
网络设备和终端设备在通信过程中,可能会发送初传数据,可能会发送重传数据。以发送重传数据为例,所述网络设备在发送重传数据时,会采用全带宽发送该重传数据,而重传数据可能无法占满全带宽,导致全带宽中不发送重传数据的部分带宽资源被浪费。
基于此,本申请实施例提供一种DCI传输方法,本申请实施例提供的DCI传输方法适用于如图1所示的通信***。在该方法中,第一终端设备接收第三DCI和第四DCI,所述第三DCI指示用于传输重传数据的时域资源和频域资源,所述第四DCI指示用于传输初传数据的时域资源和频域资源,所述第三DCI指示的时域资源和所述第四DCI指示的时域资源相同,所述第三DCI指示的频域资源和所述第四DCI指示的频域资源不同;所述第一终端设备在第三DCI指示的时域资源和频域资源上,接收重传数据,在第四DCI指示的时域资源和频域资源上,接收初传数据,第一终端设备可以同时接收重传数据和初传数据,从而避免资源浪费。参阅图4所示,所述DCI传输方法的具体流程可以包括:
S401:网络设备发送第三DCI和第四DCI,第一终端设备接收所述第三DCI和第四DCI,所述第三DCI指示用于传输重传数据的时域资源和频域资源,所述第四DCI指示用于传输初传数据的时域资源和频域资源,所述第三DCI指示的时域资源和所述第四DCI指示的时域资源相同,所述第三DCI指示的频域资源和所述第四DCI指示的频域资源不同。
即所述第三DCI包含用于传输重传数据的时域资源和频域资源的信息,所述第四DCI包含用于传输初传数据的时域资源和频域资源的信息。
所述网络设备在为所述第一终端设备调度下行资源时,可以在同一时域资源上,分配部分频域资源用于所述第一终端设备的重传数据,并为这部分频域选定适合重传数据的第三DCI,同时分配部分频域用于所述第一终端设备的初传数据,并为这部分频域选定适合初传数据的第四DCI。例如分配第一子带传输重传数据,分配第二子带传输初传数据,所述第一子带和所述第二子带的频域资源不同。
例如所述时域资源可以为时隙。
第三DCI和第四DCI不同,第一子带和第二子带不重合,即所述第一子带和所述第二子带的频域资源不同。
S402:所述网络设备在所述第三DCI指示的时域资源和频域资源上,发送重传数据,在所述第四DCI指示的时域资源和频域资源上,发送初传数据,所述第一终端设备在所述第三DCI指示的时域资源和频域资源上,接收重传数据,在所述第四DCI指示的时域资源和频域资源上,接收初传数据。
所述网络设备在同一时域资源上发送重传数据和初传数据,可以看作是同时发送重传数据和初传数据。
所述网络设备可以在以下条件下,执行S402以同时发送重传数据和初传数据:
条件一、所述网络设备根据设置的第一子带和第二子带,确定同时发送重传数据和初 传数据。
条件二、如果重传数据或初传数据无法占满全带宽,所述网络设备可以同时发送重传数据和初传数据。
所述第三DCI还可以包含重传数据的指示信息。所述第四DCI还可以包含初传数据的指示信息。
下面结合数据传输时占用时频域资源的示意图进行说明,横轴为时隙序号,纵轴为频域资源,白色框为初传调度且不需要重传的数据,黑色框为需要重传的数据,阴影框为重传且不需要继续重传的数据。确认(ACK)表示网络设备接收到终端设备反馈的某数据不需要重传的信息,不确认(NACK)表示网络设备接收到终端设备反馈的某数据需要重传的信息。例如图5中的(a)所示,现有技术中初传数据或重传数据会占用全带宽,在初传数据或重传数据无法占满全带宽时,就会造成资源浪费。图5中的(b)所示,本申请实施例中,网络设备确认某初始数据传输失败,需要重传时,所述网络设备采用同一时隙上(图中时隙序号为8),根据DCI1发送重传数据(即该传输失败的初始数据),并根据DCI0发送其他初传数据(不同于该传输失败的初始数据),DCI0和DCI1不同。
可见在该实施例中,网络设备可以在同一时隙上发送重传数据和初传数据,避免资源浪费,并且可以提升重传数据、初传数据在选取DCI上的灵活性,提高在选取时隙、子带上的灵活性,从而提高吞吐率和网络性能。
问题三:
现有数据传输过程,全带宽中的数据调度相同的DCI或避让干扰带宽,但是实际场景中由于多径传播特征的复杂性,和干扰情况的复杂性,各数据流、各子带对应的SINR差异可达10~20分贝(dB)甚至更高,SINR差异较大,造成性能损失。
示例性的,在以下场景中存在该问题:
场景一、LTE与NR通信***频谱共享时,100M(MB per second,兆比特/秒)的带宽可能包含40M干扰的子带。
场景二、大气波导干扰场景下,部分子带只受到邻区干扰,部分子带可能还会额外受到强大气波导干扰。
基于此,本申请实施例提供一种DCI传输方法,本申请实施例提供的DCI传输方法适用于如图1所示的通信***。该方法中,网络设备向终端设备发送第五DCI和第六DCI,所述第五DCI指示用于传输数据的时隙和第三子带,所述第六DCI指示用于传输数据的时隙和第四子带,所述第五DCI和所述第六DCI指示的时隙相同,所述第三子带和所述第四子带不同,从而为不同的资源选取更合适的DCI,提升性能。如图6所示,所述DCI传输方法的具体流程可以包括:
S601:网络设备将所述网络设备与终端设备之间信道的整个带宽划分为至少两个子带,不同子带受干扰程度不同。
网络设备可以按照干扰程度的不同,将全带宽划分为多个子带,不同子带的干扰程度不同。所述全带宽为所述网络设备与终端设备之间信道的整个带宽。在本申请实施例中所述全带宽指所述终端设备的全带宽,取决于所述终端设备的硬件模块和所述网络设备分配所述终端设备的用于数据传输的带宽,也就说不同终端设备的全带宽可能不同。
所述网络设备为不同子带分配的DCI不同。
例如,所述至少两个子带包括第三子带和第四子带,所述第三子带与所述第四子带受干扰程度不同,所述网络设备为所述第三子带分配第五DCI,即所述第五DCI包含用于传输数据的第三子带的信息,所述网络设备为所述第四子带分配第六DCI,即所述第六DCI包含用于传输数据的第四子带的信息。可选的,所述第三子带为受干扰较大的子带,所述第四子带为受干扰较小的子带。
S602:所述网络设备向终端设备发送第五DCI和/或第六DCI,所述第五DCI指示用于传输数据的时隙和第三子带,第六DCI指示用于传输数据的时隙和第四子带。
所述第五DCI和第六DCI指示的时隙相同。可以理解,所述第五DCI和所述第六DCI指示的时隙相同,所述第五DCI指示的时域资源和所述第六DCI指示的时域资源相同或不同。
所述第三子带和所述第四子带不同,所述第三子带和所述第四子带的受干扰程度不同。
在该S602中,所述网络设备可以为所述终端设备分配子带,所述网络设备为所述终端设备分配的子带,可能位于所述第三子带的频域范围内,可能位于所述第四子带的频域范围内,可能一部分位于所述第三子带的频域范围内,且另一部分位于所述第四子带的频域范围内。
可选的,所述网络设备可以根据为所述终端设备分配的子带,向所述终端设备发送用于指示所述子带的DCI。例如若所述网络设备为所述终端设备分配的子带位于所述第三子带的频域范围内,所述网络设备向所述终端设备发送第五DCI;若所述网络设备为所述终端设备分配的子带位于所述第四子带的频域范围内,所述网络设备向所述终端设备发送第六DCI;若所述网络设备为所述终端设备分配的子带一部分位于所述第三子带的频域范围内,且另一部分位于所述第四子带的频域范围内,所述网络设备向所述终端设备发送第五DCI和第六DCI。
或者可选的,不论为所述终端设备分配的子带位于哪个频域范围内,所述网络设备可以将所述第五DCI和所述第六DCI发送给所述终端设备。这样,终端设备能够解调不同子带上传输的数据,提高终端设备的检测能力和灵活性。
S603:所述网络设备在所述第一子带上发送数据,在所述第二子带上发送数据。所述终端设备在所述第一子带上接收数据,和/或在所述第二子带上发送数据。
一种可能的实现方式中,若为所述终端设备分配的子带位于所述第三子带的频域范围内,在该S603中,所述网络设备可以在所述第三子带上发送数据,所述终端设备在所述第三子带上接收数据。所述终端设备还可以根据所述第五DCI解调接收到的数据。例如,为所述终端设备分配的子带在受干扰较大的第三子带,所述网络设备可以根据受干扰较大的第三子带选取DCI0,采用DCI0调度数据,所述终端设备可以基于DCI0解调出在所述第三子带上接收到的数据。
另一种可能的实现方式中,若为所述终端设备分配的子带位于所述第四子带的频域范围内,在该S603中,所述网络设备可以在所述第四子带上发送数据,所述终端设备在所述第四子带上接收数据。所述终端设备还可以根据所述第六DCI解调接收到的数据。例如,为所述终端设备分配的子带在受干扰较小的第四子带,所述网络设备可以根据受干扰较小的第四子带选取DCI1,采用DCI1调度数据,所述终端设备可以基于DCI1解调出在所述第四子带上接收到的数据。
又一种可能的实现方式中,若为所述终端设备分配的子带的一部分位于所述第三子带 的频域范围内,另一部分位于所述第四子带的频域范围内,在该S603中,所述网络设备可以在所述第三子带上发送数据,并在所述第四子带上发送数据。例如,为所述终端设备分配的带宽横跨了受干扰较大的第三子带和受干扰较小的第四子带,所述网络设备根据采用DCI0和DCI1调度数据,所述终端设备可以支持双DCI分别检测,使用DCI0解调出受干扰较大的第三子带上的数据,使用DCI1解调出受干扰较小的第四子带上的数据。
下面结合数据传输时占用时频域资源的示意图进行说明,网络设备和第一终端设备之间信道的整个带宽划分为受干扰的子带和未受干扰的子带。如图7中的(a)所示,现有技术中无论整个带宽中是否存在受干扰或未受干扰的子带,网络设备均基于特定的单DCI(如DCI0)调度全带宽的数据。或者如图7中的(b)所示,现有技术中网络设备基于特定的单DCI(如DCI0)调度未受干扰的子带的数据,受干扰的子带上不进行数据的传输。而如图7中的(c)所示,本申请实施例中所示的DCI传输流程中,网络设备基于DCI0调度受干扰的子带的数据,基于DCI1调度未受干扰的子带的数据。
在本申请实施例中网络设备还可以根据子带受干扰程度的不同,为不同的子带选取合适的DCI,不同DCI中包含不同的调制与编码策略(modulation and coding scheme,MCS)信息,例如可以为受干扰程度较大的子带选取较小的MCS,可以为受干扰程度较小的子带选取较大的MCS,网络设备为各子带的MCS选阶更匹配各数据流的SINR,保证选取的MCS在对应子带传输时误码率符合误码率目标,更符合实际传输需求,从而提高吞吐率和网络性能。
可以理解的是,上述各实施例之间可以单独使用,也可以结合使用。
本申请实施例可以适用于SU场景下的多流传输、MU场景下的多流传输、SU/MU场景下单用户的重传数据和初传数据同时传输、SU/MU场景下单用户的受干扰程度不同的多个子带中数据同时传输。
本申请实施例还可以适用于无线保真(wireless fidelity,WiFi)场景、超高可靠与低时延通信(ultra-reliable low-latency communication,URLLC)数据和可靠性要求为普通的数据同时传输场景、机器类通信(machine-type communication,MTC)数据和普通数据同时传输场景。
以上结合图1至图7详细说明了本申请实施例的通信方法,基于与上述DCI传输方法的同一发明构思,本申请实施例还提供了一种DCI传输装置,如图8所示,所述装置800包含处理单元801和收发单元802,装置800可用于实现上述应用于终端设备或网络设备的方法实施例中描述的方法。所述终端设备包括第一终端设备。
在一个实施例中,装置800应用于终端设备,如第一终端设备。
具体的,所述收发单元802,用于接收第一DCI和第二DCI,所述第一DCI用于调度第一终端设备的第一数据流,所述第二DCI用于调度第二终端设备的第二数据流,所述第二数据流对所述第一数据流造成干扰;
所述处理单元801,用于根据所述第一DCI和第二DCI解调第一数据流。
在一个实现方式中,所述处理单元801在根据所述第一DCI和第二DCI解调第一数据流时,具体用于根据所述第一DCI的第一下行参考信号,进行信道估计,得到第一信道估 计结果;根据所述第二DCI的第二下行参考信号,进行信道估计,得到第二信道估计结果;根据所述第一信道估计结果和所述第二信道估计结果解调所述第一数据流。
在另一个实施例中,装置800应用于网络设备。
具体的,所述处理单元801,用于确定第一DCI和第二DCI,所述第一DCI用于调度第一终端设备的第一数据流,所述第二DCI用于调度第二终端设备的第二数据流,所述第二数据流对所述第一数据流造成干扰;
所述收发单元802,用于向所述第一终端设备发送所述第一DCI和所述第二DCI;向所述第一终端设备发送第一数据流;向所述第二终端设备发送第二数据流。
在一个实现方式中,所述收发单元802,还用于发送所述第一DCI的第一下行参考信号,和所述第二DCI的第二下行参考信号;所述第一下行参考信号和所述第二下行参考信号用于解调第一数据流。
在一个实现方式中,所述处理单元801,还用于在所述收发单元向第一终端设备发送第一DCI和第二DCI之前,确定对所述第一数据流造成干扰的第二数据流。
在一个实施例中,装置800应用于终端设备,如第一终端设备。
具体的,所述收发单元802,用于接收第一DCI和第二DCI,所述第一DCI指示用于传输重传数据的时域资源和频域资源,所述第二DCI指示用于传输初传数据的时域资源和频域资源,所述第一DCI指示的时域资源和所述第二DCI指示的时域资源相同,所述第一DCI指示的频域资源和所述第二DCI指示的频域资源不同;在所述第一DCI指示的时域资源和频域资源上,接收重传数据,在所述第二DCI指示的时域资源和频域资源上,接收初传数据;
所述处理单元801,用于确定重传数据和初传数据。
在另一个实施例中,装置800应用于网络设备。
具体的,所述处理单元801,用于确定第一DCI和第二DCI,所述第一DCI指示用于传输重传数据的时域资源和频域资源,所述第二DCI指示用于传输初传数据的时域资源和频域资源,所述第一DCI指示的时域资源和所述第二DCI指示的时域资源相同,所述第一DCI指示的频域资源和所述第二DCI指示的频域资源不同;
所述收发单元802,用于发送第一DCI和第二DCI;在所述第一DCI指示的时域资源和频域资源上,发送重传数据,在所述第二DCI指示的时域资源和频域资源上,发送初传数据。
在一个实施例中,装置800应用于网络设备。
具体的,所述处理单元801,用于确定第一DCI和第二DCI,所述第一DCI指示用于传输数据的时隙和第一子带,所述第二DCI指示用于传输数据的时隙和第二子带,所述第一DCI和所述第二DCI指示的时隙相同,所述第一子带和所述第二子带不同;
所述收发单元802,用于发送所述第一DCI和所述第二DCI;在所述第一子带上发送第一数据,在所述第二子带上发送第二数据。
在一个实现方式中,所述第一子带与所述第二子带受干扰程度不同。
需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,另外,在本申请各个实施例中的各功能单元可以集成 在一个处理单元中,也可以是单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(read-only memory,ROM)、随机存取存储器(random access memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
基于与上述DCI传输方法相同的构思,如图9所示,本申请实施例还提供了一种DCI传输装置900的结构示意图。装置900可用于实现上述应用于终端设备或网络设备的方法实施例中描述的方法,可以参见上述方法实施例中的说明。所述装置900可以处于终端设备或网络设备中或为终端设备或网络设备。所述终端设备包括第一终端设备。
所述装置900包括一个或多个处理器901。所述处理器901可以是通用处理器或者专用处理器等。例如可以是基带处理器、或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理,中央处理器可以用于对装置(如,基站、终端、或芯片等)进行控制,执行软件程序,处理软件程序的数据。所述装置可以包括收发单元,用以实现信号的输入(接收)和输出(发送)。例如,所述收发单元可以为收发器,射频芯片等。
所述装置900包括一个或多个所述处理器901,所述一个或多个处理器901可实现上述所示的实施例中第一终端设备或网络设备的方法。
可选的,处理器901除了实现上述所示的实施例的方法,还可以实现其他功能。
可选的,一种设计中,处理器901可以执行指令,使得所述装置900执行上述方法实施例中描述的方法。所述指令可以全部或部分存储在所述处理器内,如指令903,也可以全部或部分存储在与所述处理器耦合的存储器902中,如指令904,也可以通过指令903和904共同使得装置900执行上述方法实施例中描述的方法。
在又一种可能的设计中,DCI传输装置900也可以包括电路,所述电路可以实现前述方法实施例中第一终端设备或网络设备的功能。
在又一种可能的设计中所述装置900中可以包括一个或多个存储器902,其上存有指令904,所述指令可在所述处理器上被运行,使得所述装置900执行上述方法实施例中描述的方法。可选的,所述存储器中还可以存储有数据。可选的处理器中也可以存储指令和/或数据。例如,所述一个或多个存储器902可以存储上述实施例中所描述的对应关系,或者上述实施例中所涉及的相关的参数或表格等。所述处理器和存储器可以单独设置,也可以集成在一起。
在又一种可能的设计中,所述装置900还可以包括收发器905以及天线906。所述处理器901可以称为处理单元,对装置(终端或者基站)进行控制。所述收发器905可以称为收发机、收发电路、或者收发单元等,用于通过天线906实现装置的收发功能。
应注意,本申请实施例中的处理器可以是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软 件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application specific integrated circuit,ASIC)、现成可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
可以理解,本申请实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(ROM)、可编程只读存储器(programmable ROM,PROM)、可擦除可编程只读存储器(erasable PROM,EPROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM,DR RAM)。应注意,本文描述的***和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读介质,其上存储有计算机程序,该计算机程序被计算机执行时实现上述应用于终端设备或网络设备的任一方法实施例所述的DCI传输方法。
本申请实施例还提供了一种计算机程序产品,该计算机程序产品被计算机执行时实现上述应用于终端设备或网络设备的任一方法实施例所述的DCI传输方法。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如,软盘、硬盘、磁带)、光介质(例如,高密度数字视频光盘(digital video disc,DVD))、或者半导体介质(例如,固态硬盘(solid state disk,SSD))等。
本申请实施例还提供了一种处理装置,包括处理器和接口;所述处理器,用于执行上述应用于终端设备或网络设备的任一方法实施例所述的DCI传输方法。
应理解,上述处理装置可以是一个芯片,所述处理器可以通过硬件来实现也可以通过软件来实现,当通过硬件实现时,该处理器可以是逻辑电路、集成电路等;当通过软件来实现时,该处理器可以是一个通用处理器,通过读取存储器中存储的软件代码来实现,该存储器可以集成在处理器中,可以位于所述处理器之外,独立存在。
本申请实施例还提供了一种芯片,包括逻辑电路和输入输出接口,所述输入输出接口用于接收/输出代码指令或信息,所述逻辑电路用于执行所述代码指令或根据所述信息,以执行上述应用于终端设备或网络设备的任一方法实施例所述的DCI传输方法。
所述芯片可以实现上述实施例中处理单元和/或收发单元所示的功能。
本申请实施例还提供了一种通信***,包括终端设备或网络设备,所述第一终端设备用于执行上述应用于终端设备的任一方法实施例所述的DCI传输方法,所述网络设备用于执行上述应用于网络设备的任一方法实施例所述的DCI传输方法。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为了描述的方便和简洁,上述描述的***、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的***、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个***,或一些特征可以忽略,或不执行。另外,所显示或讨论的相互之间的耦合或直接耦合或DCI传输连接可以是通过一些接口、装置或单元的间接耦合或DCI传输连接,也可以是电的,机械的或其它的形式连接。
作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本申请可以用硬件实现,或固件实现,或它们的组合方式来实现。当使用软件实现时,可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算 机可读介质包括计算机存储介质和DCI传输介质,其中DCI传输介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于:计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如,如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的,那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本申请所使用的,盘(Disk)和碟(disc)包括压缩光碟(CD)、激光碟、光碟、数字通用光碟(DVD)、软盘和蓝光光碟,其中盘通常磁性的复制数据,而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
总之,以上所述仅为本申请技术方案的较佳实施例而已,并非用于限定本申请的保护范围。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。
Claims (25)
- 一种下行控制信息DCI传输方法,其特征在于,包括:第一终端设备接收第一DCI和第二DCI,所述第一DCI用于调度所述第一终端设备的第一数据流,所述第二DCI用于调度第二终端设备的第二数据流,所述第二数据流对所述第一数据流造成干扰;所述第一终端设备根据所述第一DCI和第二DCI解调第一数据流。
- 如权利要求1所述的方法,其特征在于,所述第一终端设备根据所述第一DCI和第二DCI解调第一数据流,包括:所述第一终端设备根据所述第一DCI的第一下行参考信号,进行信道估计,得到第一信道估计结果;所述第一终端设备根据所述第二DCI的第二下行参考信号,进行信道估计,得到第二信道估计结果;所述第一终端设备根据所述第一信道估计结果和所述第二信道估计结果解调所述第一数据流。
- 一种下行控制信息DCI传输方法,其特征在于,包括:网络设备向第一终端设备发送第一DCI和第二DCI,所述第一DCI用于调度第一终端设备的第一数据流,所述第二DCI用于调度第二终端设备的第二数据流,所述第二数据流对所述第一数据流造成干扰;所述网络设备向所述第一终端设备发送第一数据流;所述网络设备向所述第二终端设备发送第二数据流。
- 如权利要求3所述的方法,其特征在于,还包括:所述网络设备发送所述第一DCI的第一下行参考信号,和所述第二DCI的第二下行参考信号;所述第一下行参考信号和所述第二下行参考信号用于解调第一数据流。
- 如权利要求3或4所述的方法,其特征在于,所述网络设备向第一终端设备发送第一DCI和第二DCI之前,还包括:所述网络设备确定对所述第一数据流造成干扰的第二数据流。
- 一种通信装置,其特征在于,包括处理单元和收发单元;所述收发单元,用于接收第一DCI和第二DCI,所述第一DCI用于调度第一终端设备的第一数据流,所述第二DCI用于调度第二终端设备的第二数据流,所述第二数据流对所述第一数据流造成干扰;所述处理单元,用于根据所述第一DCI和第二DCI解调第一数据流。
- 如权利要求6所述的装置,其特征在于,所述处理单元在根据所述第一DCI和第二DCI解调第一数据流时,具体用于根据所述第一DCI的第一下行参考信号,进行信道估计,得到第一信道估计结果;根据所述第二DCI的第二下行参考信号,进行信道估计,得到第二信道估计结果;根据所述第一信道估计结果和所述第二信道估计结果解调所述第一数据流。
- 一种通信装置,其特征在于,包括处理单元和收发单元;所述处理单元,用于确定第一DCI和第二DCI,所述第一DCI用于调度第一终端设备的第一数据流,所述第二DCI用于调度第二终端设备的第二数据流,所述第二数据流对所述第一数据流造成干扰;所述收发单元,用于向所述第一终端设备发送所述第一DCI和所述第二DCI;向所述第一终端设备发送第一数据流;向所述第二终端设备发送第二数据流。
- 如权利要求8所述的装置,其特征在于,所述收发单元,还用于发送所述第一DCI的第一下行参考信号,和所述第二DCI的第二下行参考信号;所述第一下行参考信号和所述第二下行参考信号用于解调第一数据流。
- 如权利要求8或9所述的装置,其特征在于,所述处理单元,还用于在所述收发单元向第一终端设备发送第一DCI和第二DCI之前,确定对所述第一数据流造成干扰的第二数据流。
- 一种下行控制信息DCI传输方法,其特征在于,包括:第一终端设备接收第一DCI和第二DCI,所述第一DCI指示用于传输重传数据的时域资源和频域资源,所述第二DCI指示用于传输初传数据的时域资源和频域资源,所述第一DCI指示的时域资源和所述第二DCI指示的时域资源相同,所述第一DCI指示的频域资源和所述第二DCI指示的频域资源不同;所述第一终端设备在所述第一DCI指示的时域资源和频域资源上,接收重传数据,在所述第二DCI指示的时域资源和频域资源上,接收初传数据。
- 一种下行控制信息DCI传输方法,其特征在于,包括:网络设备发送第一DCI和第二DCI,所述第一DCI指示用于传输重传数据的时域资源和频域资源,所述第二DCI指示用于传输初传数据的时域资源和频域资源,所述第一DCI指示的时域资源和所述第二DCI指示的时域资源相同,所述第一DCI指示的频域资源和所述第二DCI指示的频域资源不同;所述网络设备在所述第一DCI指示的时域资源和频域资源上,发送重传数据,在所述第二DCI指示的时域资源和频域资源上,发送初传数据。
- 一种通信装置,其特征在于,包括处理单元和收发单元;所述收发单元,用于接收第一DCI和第二DCI,所述第一DCI指示用于传输重传数据的时域资源和频域资源,所述第二DCI指示用于传输初传数据的时域资源和频域资源,所述第一DCI指示的时域资源和所述第二DCI指示的时域资源相同,所述第一DCI指示的频域资源和所述第二DCI指示的频域资源不同;在所述第一DCI指示的时域资源和频域资源上,接收重传数据,在所述第二DCI指示的时域资源和频域资源上,接收初传数据;所述处理单元,用于确定重传数据和初传数据。
- 一种通信装置,其特征在于,包括处理单元和收发单元;所述处理单元,用于确定第一DCI和第二DCI,所述第一DCI指示用于传输重传数据的时域资源和频域资源,所述第二DCI指示用于传输初传数据的时域资源和频域资源,所述第一DCI指示的时域资源和所述第二DCI指示的时域资源相同,所述第一DCI指示的频域资源和所述第二DCI指示的频域资源不同;所述收发单元,用于发送第一DCI和第二DCI;在所述第一DCI指示的时域资源和频域资源上,发送重传数据,在所述第二DCI指示的时域资源和频域资源上,发送初传数据。
- 一种下行控制信息DCI传输方法,其特征在于,包括:网络设备向终端设备发送第一DCI和第二DCI,所述第一DCI指示用于传输数据的时隙和第一子带,所述第二DCI指示用于传输数据的时隙和第二子带,所述第一DCI和所述第二DCI指示的时隙相同,所述第一子带和所述第二子带不同;所述网络设备在所述第一子带上发送第一数据,在所述第二子带上发送第二数据。
- 如权利要求15所述的方法,其特征在于,所述第一子带与所述第二子带受干扰程度不同。
- 一种通信装置,其特征在于,包括处理单元和收发单元;所述处理单元,用于确定第一DCI和第二DCI,所述第一DCI指示用于传输数据的时隙和第一子带,所述第二DCI指示用于传输数据的时隙和第二子带,所述第一DCI和所述第二DCI指示的时隙相同,所述第一子带和所述第二子带不同;所述收发单元,用于发送所述第一DCI和所述第二DCI;在所述第一子带上发送第一数据,在所述第二子带上发送第二数据。
- 如权利要求17所述的装置,其特征在于,所述第一子带与所述第二子带受干扰程度不同。
- 一种通信装置,其特征在于,包括处理器和存储器,所述处理器与所述存储器耦合;存储器,用于存储计算机程序;处理器,用于执行所述存储器中存储的计算机程序,以使得所述装置执行如权利要求1-2任一项所述的方法,或者执行如权利要求3-5任一项所述的方法,或者执行如权利要求11所述的方法,或者执行如权利要求12所述的方法,或者执行如权利要求15-16任一项所述的方法。
- 一种计算机可读存储介质,其特征在于,包括程序或指令,当所述程序或指令在计算机上运行时,如权利要求1-2任一项所述的方法被执行,或者如权利要求3-5任一项所述的方法被执行,或者如权利要求11所述的方法被执行,或者如权利要求12所述的方法被执行,或者如权利要求15-16任一项所述的方法被执行。
- 一种计算机程序产品,其特征在于,包括程序或指令,当所述程序或指令在计算机上运行时,如权利要求1-2任一项所述的方法被执行,或者如权利要求3-5任一项所述的方法被执行,或者如权利要求11所述的方法被执行,或者如权利要求12所述的方法被执行,或者如权利要求15-16任一项所述的方法被执行。
- 一种芯片,其特征在于,所述芯片与存储器耦合,用于读取并执行所述存储器中存储的程序指令,以执行如权利要求1-2任一项所述的方法,或者执行如权利要求3-5任一项所述的方法,或者执行如权利要求11所述的方法,或者执行如权利要求12所述的方法,或者执行如权利要求15-16任一项所述的方法。
- 一种通信***,其特征在于,包括执行如权利要求1-2任一项所述方法的第一终端设备,和执行如权利要求3-5任一项所述方法的网络设备。
- 一种通信***,其特征在于,包括执行如权利要求11所述方法的第一终端设备,和执行如权利要求12所述方法的网络设备。
- 一种通信***,其特征在于,包括终端设备,和执行如权利要求15-16任一项所述方法的网络设备。
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