WO2018191868A1 - 一种指示子帧配置的方法及装置 - Google Patents

一种指示子帧配置的方法及装置 Download PDF

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Publication number
WO2018191868A1
WO2018191868A1 PCT/CN2017/080965 CN2017080965W WO2018191868A1 WO 2018191868 A1 WO2018191868 A1 WO 2018191868A1 CN 2017080965 W CN2017080965 W CN 2017080965W WO 2018191868 A1 WO2018191868 A1 WO 2018191868A1
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WIPO (PCT)
Prior art keywords
subframe
dci
symbols included
downlink
nth
Prior art date
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PCT/CN2017/080965
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English (en)
French (fr)
Inventor
任占阳
李振宇
韩金侠
张武荣
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201780089504.7A priority Critical patent/CN110495235A/zh
Priority to PCT/CN2017/080965 priority patent/WO2018191868A1/zh
Priority to EP17905983.7A priority patent/EP3606279A4/en
Priority to BR112019021725A priority patent/BR112019021725A2/pt
Publication of WO2018191868A1 publication Critical patent/WO2018191868A1/zh
Priority to US16/657,141 priority patent/US20200053732A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
    • H04L1/0008—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length by supplementing frame payload, e.g. with padding bits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/003—Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a method and an apparatus for indicating subframe configuration.
  • MFA Mult Alliance Alliance
  • LTE Long Term Evolution
  • WCE Wideband Coverage Extension
  • the downlink channel coverage in the WCE is limited relative to the uplink channel. Therefore, at present, the focus is mainly on the coverage enhancement of the downlink channel.
  • the working point of the downlink channel of MF1.1 needs to be enhanced by 8dB based on the downlink channel operating point of MF1.0, that is, the signal of the downlink channel and the interference plus noise that the device of MF1.1 can detect.
  • the Signal to Interference plus Noise Ratio (SINR) needs to be reduced by 8 dB.
  • SINR Signal to Interference plus Noise Ratio
  • the base station transmits information through the downlink channel of MF1.0, for example, downlink control information (DCI) is transmitted through the downlink control channel of MF1.0, the downlink control channel works due to MF1.0. If the point SINR is relatively high, the terminal device of the MF 1.1 cannot demodulate the DCI transmitted through the downlink control channel of the MF 1.0, so that the terminal device of the MF 1.1 may miss the information.
  • DCI downlink control information
  • the embodiment of the invention provides a method and a device for indicating a subframe configuration, which are used to improve the demodulation success rate of the terminal device for information.
  • a method of indicating a subframe configuration is provided, which may be performed by a network device, and in particular, by a communication device in a network device.
  • the network device is, for example, a base station, and the communication device may be the network device itself or a functional module in the network device.
  • the method includes: the network device determines the number of downlink symbols included in the n+Nth subframe, and the network device sends the DCI through the downlink control channel in both the control domain and the data domain of the nth subframe.
  • n is an integer greater than or equal to 0
  • N is an integer greater than or equal to 2
  • DCI is used to indicate the number of downlink symbols included in the n+Nth subframe.
  • the network device sends the DCI through the downlink control channel in the control domain and the data domain, which is equivalent to allocating more physical resources to the downlink control channel, thereby achieving the purpose of coverage enhancement.
  • the downlink control channel DCI can be demodulated by the downlink control channel of the control domain and the extended downlink control channel, and the demodulation success rate of the terminal device for information is improved.
  • the downlink control channel is extended and transmitted in the entire subframe n, if the number of downlink symbols included in the nth subframe is indicated in the nth subframe, or the n+1th indication is indicated.
  • the number of downlink symbols included in the subframe the coverage enhanced terminal device needs to be processed at the starting point of the n+1th subframe.
  • the information carried by the downlink control channel Considering the influence of algorithm delay, etc., even if the terminal device can correctly demodulate the DCI, the effective time point of the symbol indicated by the DCI may have been missed.
  • the nth subframe or the n+1th subframe indicated by the DCI is a special subframe.
  • the network device indicates the number of downlink symbols included in the n+Nth subframe in the nth subframe, and N is greater than or equal to 2, which can ensure that the terminal device can demodulate the DCI in time. The probability of a small system anomaly.
  • the DCI indicates the number of downlink symbols included in the n+Nth subframe by the reserved bits in the DCI.
  • the Reserved field is set in the DCI, and the Reserved field has not been utilized yet. Then, the embodiment of the present invention uses the Reserved field to indicate the number of downlink symbols included in the n+N subframes, thereby improving resource utilization.
  • the Reserved field includes 4 bits, and the embodiment of the present invention may utilize at least one of the bits to indicate the number of downlink symbols included in the n+Nth subframe. The embodiment of the present invention is not limited in terms of how many bits are specifically used to indicate the number of downlink symbols included in the n+Nth subframe.
  • the number of downlink symbols included in the n+Nth subframe is less than a first preset threshold.
  • the first preset threshold is the number of downlink symbols included in one complete subframe.
  • the terminal device needs to complete the downlink to uplink switching at the uplink switching point of the special subframe. If the current subframe or the next subframe indicated by the DCI transmitted in the nth subframe indicates the number of downlink symbols, if the current subframe or the next subframe is a special subframe, the terminal device is in the uplink of the special subframe. When the switch point arrives, it may not be possible to demodulate the received DCI.
  • the number of downlink symbols included in the n+Nth subframe of the terminal device is notified by at least 2 subframes in advance, so that the terminal device has sufficient time to perform downlink-to-uplink switching to ensure normal operation of the system.
  • the first preset threshold is 12.
  • 12 or 14 is only an example, which is a number of symbols included in a complete subframe determined according to different types of subframes.
  • the value of the first preset threshold may be different. It can be determined according to the protocol or the standard, and the embodiment of the present invention is not limited.
  • the network device may also determine that the n+N+1th subframe is an uplink subframe.
  • the n+N+1th subframe may be a separate uplink subframe, or may be the first uplink subframe included in the UL Burst.
  • the base station determines that the n+N+1 subframe is an uplink subframe or the first uplink subframe included in the UL Burst. That is, it is determined that the n+Nth subframe is a special subframe, and the base station may send the CPDCCH DCI to the terminal device in both the control domain and the data domain of the nth subframe, so that the terminal device can demodulate the DCI in time.
  • a method for indicating a subframe configuration is provided, which may be performed by a terminal device, and specifically, may be performed by a communication device in a terminal device.
  • the communication device can be the terminal device itself or a functional module in the terminal device.
  • the method includes: the terminal device receives the DCI through the downlink control channel in both the control domain and the data domain of the nth subframe.
  • the terminal device determines the number of downlink symbols included in the n+Nth subframe according to the DCI.
  • n is an integer greater than or equal to 0, and N is an integer greater than or equal to 2.
  • the method provided by the second aspect and the method provided by the first aspect can be understood as a corresponding method, that is, the method provided by the first aspect describes how the network device processes, and the method of the second aspect introduces the corresponding terminal device. How to deal with it.
  • the terminal device determines, according to the DCI, the number of downlink symbols included in the n+Nth subframe, including: determining, by the terminal device, the downlink symbol included in the n+N subframe according to the indication of the reserved bit in the DCI. Quantity.
  • the network device can use the Reserved field in the DCI to indicate the number of downlink symbols included in the n+N subframes, and the terminal device can determine the n+N by using the Reserved field in the received DCI.
  • the number of downlink symbols included in a sub-frame In this way, the resource utilization is improved, and the method is simple and easy to implement.
  • the terminal device further determines the location of the n+Nth subframe according to the uplink subframe offset information carried by the DCI.
  • the uplink subframe offset information is used to indicate the value of N.
  • N is not a fixed value
  • the network device sends a CPDCCH DCI to the terminal device when determining that the n+N+1th subframe is the first uplink subframe included in the UL Burst
  • N may not be a fixed value.
  • the terminal device determines the location of the n+Nth subframe according to other fields, that is, determines the location of N. value.
  • the embodiment of the present invention may further carry the uplink subframe offset information in the DCI, and the uplink subframe offset information may indicate the location where the n+N subframes are located, and the terminal device is configured according to the uplink subframe in the received DCI.
  • the offset information can determine the location of the n+Nth subframe.
  • the network device may configure the number of downlink symbols indicated by the DCI in 2 subframes or more, and is not limited to the 2 subframes to notify the terminal device in advance, which is more flexible for the network device.
  • the number of downlink symbols included in the n+Nth subframe is smaller than a first preset threshold, and the first preset threshold is the number of downlink symbols included in one complete subframe.
  • the first preset threshold is 12.
  • the terminal device determines that the n+N+1th subframe is an uplink subframe.
  • N is not a fixed value, that is, the terminal device determines the location of the n+Nth subframe according to other fields, in addition to determining the number of downlink symbols included in the n+Nth subframe according to the Rerserved field, then the terminal The device can determine that the n+N+1th subframe is an uplink subframe. If the n+N+1th subframe is the first uplink subframe included in the UL Burst, the terminal device can also determine the UL Burst.
  • a method of indicating a subframe configuration may be performed by a network device, and in particular, by a communication device in a network device.
  • the network device is, for example, a base station, and the communication device may be the network device itself or a functional module in the network device.
  • the method includes: the network device determines the number of downlink symbols included in the n+Nth subframe, and the network device sends the first DCI through the downlink control channel in the data domain of the nth subframe. Where N is an integer greater than or equal to 2, and n is an integer greater than or equal to 0, and the first DCI is used to indicate the number of downlink symbols included in the n+Nth subframe.
  • the first DCI is equivalent to the DCI redesigned for the terminal device of MF1.1, and the DCI sent in the control domain is the DCI designed for the terminal device of MF1.0. Then, if it is necessary to send the DCI to the terminal device of MF1.1, The network device does not need to send DCI in both the control domain and the data domain, but only needs to send DCI in the data domain, which saves transmission resources.
  • the number of bits in the first DCI used to indicate the number of downlink symbols included in the n+N subframes is less than a second preset threshold.
  • the n+Nth subframe packet may be indicated by using 3 bits or less.
  • the number of downlink symbols included, the number of bits specifically occupied is related to the indication mode. That is, the number of bits in the first DCI for indicating the number of downlink symbols included in the n+Nth subframe is smaller than a second preset threshold, and the second preset threshold may be DCI compatible with the terminal device of the MF1.0.
  • the number of bits occupied by the Subframe configuration for LAA or MF field is, for example, 4. It can be seen that the first DCI further saves transmission resources while achieving the purpose of indicating the number of downlink symbols included in the n+N subframes.
  • the network device transmits the second DCI through the downlink control channel in the control domain of the nth subframe.
  • the format of the first DCI and the second DCI is different.
  • the DCI corresponding to the MF1.1 is redesigned, that is, the first DCI, and the first DCI does not need to consider the terminal device compatible with the MF1.0, so the network device may consider different when transmitting the DCI.
  • the version of the terminal device for example, when the DCI needs to be sent to the terminal device of the MF1.0, the network device can send the DCI to the terminal device of the MF1.0 through the downlink control channel of the control domain, and the DCI that will be sent through the control domain in the following
  • the network device may send the first DCI to the terminal device of the MF1.1 through the downlink control signal of the data domain, where the first DCI and the second DCI may be in one
  • the transmission in the subframe for example, is sent in the nth subframe, or may be sent in different subframes.
  • the embodiment of the present invention does not limit the sending time and the sending sequence of the first DCI and the second DCI.
  • the first DCI and the second DCI are two independent parts that do not interfere with each other and are more convenient for network devices to manage.
  • the first DCI is specifically designed for the terminal device of MF1.1, the format of the first DCI and the second DCI are different.
  • the length of the first DCI is less than the length of the second DCI.
  • the second DCI is the DCI corresponding to the terminal device of the MF1.1, which includes the Reserved field, and the first DCI may not include the Reserved field.
  • the reason is that the Reserved field is reserved in the second DCI for compatibility consideration, that is, for compatibility with the MF1.0 terminal device. However, in the embodiment of the present invention, the compatibility situation is no longer considered, and then the Reserved field does not need to be reserved in the first DCI. Compared with the length of the second DCI, the length of the payload is decreased, the waste of resources is reduced, the code rate is lowered, and the coverage enhancement can be further achieved.
  • a method for indicating a subframe configuration is provided, which may be performed by a terminal device, and specifically, may be performed by a communication device in a terminal device.
  • the communication device can be the terminal device itself or a functional module in the terminal device.
  • the method includes: receiving, by the terminal device, the first downlink control information DCI sent by the network device by using the downlink control channel in the data field of the nth subframe, and determining, by the terminal device, the number of downlink symbols included in the n+Nth subframe according to the first DCI.
  • n is an integer greater than or equal to
  • N is an integer greater than or equal to 2.
  • the method provided by the fourth aspect and the method provided by the third aspect can be understood as a corresponding method, that is, the method provided by the third aspect introduces how the network device processes, and the method of the fourth aspect introduces the corresponding terminal device. How to deal with it.
  • the terminal device determines the location of the n+Nth subframe according to the uplink subframe offset information carried by the first DCI.
  • the uplink subframe offset information is used to indicate the value of N.
  • the first DCI can indicate the value of N by using the uplink subframe offset information, in addition to the number of downlink symbols included in the n+N subframes, and the terminal device receives the first.
  • the value of the N is determined according to the uplink subframe offset information carried by the first DCI, and the method is relatively simple.
  • the number of bits in the first DCI used to indicate the number of downlink symbols included in the n+N subframes is less than a second preset threshold.
  • the terminal device receives the second DCI sent by the network device through the downlink control channel in the control domain of the nth subframe.
  • the format of the first DCI and the second DCI is different.
  • the network device can send the second DCI to the terminal device of the MF1.0 through the downlink control channel of the control domain, and the terminal of the MF1.0.
  • the device or the terminal device of the MF1.1 can receive the second DCI in the control domain.
  • the network device can send the first message to the terminal device of the MF1.1 through the downlink control signal of the data domain.
  • the terminal device of MF1.1 can receive the first DCI in the data domain.
  • the terminal device receives the first DCI and the second DCI in one subframe, or the first DCI and the second DCI are sent in different subframes, The terminal device receives the first DCI and the second DCI in different subframes, which is not limited in the embodiment of the present invention.
  • the length of the first DCI is less than the length of the second DCI.
  • a communication device has the function of implementing the network device in the above method design. These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the specific structure of the communication device may include a processing unit and a transmitting unit.
  • the processing unit and the transmitting unit may perform the respective functions of the methods provided by any of the possible aspects of the first aspect or the first aspect described above.
  • a communication device has the function of implementing the terminal device in the above method design. These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the specific structure of the communication device may include a processing unit and a receiving unit.
  • the processing unit and the receiving unit may perform the respective functions of the methods provided by any of the possible aspects of the second aspect or the second aspect described above.
  • a communication device has the function of implementing the network device in the above method design. These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the specific structure of the communication device may include a processing unit and a transmitting unit.
  • the processing unit and the transmitting unit may perform the respective functions of the methods provided by any of the possible aspects of the third aspect or the third aspect described above.
  • a communication device has the function of implementing the terminal device in the above method design. These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the specific structure of the communication device may include a processing unit and a receiving unit.
  • the processing unit and the receiving unit may perform the respective functions of the methods provided by any of the possible aspects of the fourth aspect or the fourth aspect described above.
  • a communication device may be a network device or a functional module such as a chip disposed in the network device.
  • the communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions which, when executed by the processor, cause the communication device to perform the method performed by the network device in any of the possible aspects of the first aspect or the first aspect described above.
  • a communication device may be a terminal device or a functional module such as a chip disposed in the terminal device.
  • the communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface.
  • the program code stored in the memory includes The instructions, when executed by the processor, cause the communication device to perform the method performed by the terminal device in any one of the possible aspects of the second aspect or the second aspect above.
  • a communication device may be a network device or a functional module such as a chip disposed in the network device.
  • the communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions which, when executed by the processor, cause the communication device to perform the method performed by the network device in any of the possible aspects of the third aspect or the third aspect above.
  • a communication device may be a terminal device or a functional module such as a chip disposed in the terminal device.
  • the communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions which, when executed by the processor, cause the communication device to perform the method performed by the terminal device in any of the possible designs of the fourth aspect or the fourth aspect above.
  • a thirteenth aspect a computer storage medium for storing computer software instructions for use in the communication device described in the fifth aspect or the communication device described in the ninth aspect, and for performing the above first aspect or A program designed for a network device in any of the possible designs of the first aspect.
  • a fourteenth aspect a computer storage medium for storing computer software instructions for use in the communication device described in the sixth aspect or the communication device described in the tenth aspect, and for performing the second aspect or A program designed for a terminal device in any of the possible designs of the second aspect.
  • a fifteenth aspect a computer storage medium for storing computer software instructions for use in the communication device described in the seventh aspect or the communication device described in the eleventh aspect, and for performing the first aspect described above Or a program designed for a network device in any of the possible designs of the first aspect.
  • a sixteenth aspect a computer storage medium for storing computer software instructions for use in the communication device described in the above eighth aspect or the communication device described in the twelfth aspect, and for performing the fourth aspect described above Or a program designed for a terminal device in any of the possible designs of the fourth aspect.
  • a computer program product comprising instructions, when run on a computer, causes the computer to perform the method of any of the possible aspects of the first aspect or the first aspect.
  • a computer program product comprising instructions, when run on a computer, causes the computer to perform the method of any one of the possible aspects of the second aspect or the second aspect.
  • a computer program product comprising instructions, when run on a computer, causes the computer to perform the method of any one of the possible aspects of the third aspect or the third aspect.
  • a computer program product comprising instructions, when run on a computer, causes the computer to perform the method of any one of the possible aspects of the fourth aspect or the fourth aspect.
  • the network device indicates, in the nth subframe, the number of downlink symbols included in the n+Nth subframe, where N is greater than or equal to 2, which can ensure that the terminal device can demodulate DCI in time and reduce the probability of system anomaly.
  • FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of expanding a CPDCCH resource in a data domain according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a processing procedure of a terminal device when a DCI indicates a number of downlink symbols included in a next subframe according to an embodiment of the present disclosure
  • FIG. 4 is a flowchart of a method for indicating a subframe configuration according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a processing procedure of a terminal device when a DCI indicates a number of downlink symbols included in an n+2th subframe according to an embodiment of the present disclosure
  • FIG. 6 is a flowchart of a method for indicating a subframe configuration according to an embodiment of the present invention.
  • FIGS. 7-11 are schematic structural diagrams of a communication apparatus according to an embodiment of the present invention.
  • a terminal device which is a device that provides voice and/or data connectivity to a user, for example, may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a Radio Access Network (RAN) to exchange voice and/or data with the RAN.
  • the terminal device may include a user equipment (User Equipment, UE), a wireless terminal device, a mobile terminal device, a Subscriber Unit, a Subscriber Station, a mobile station, a mobile station, and a remote station.
  • Station Remote Station
  • AP Access Point
  • Remote Terminal Access Terminal
  • User Terminal UserAgent
  • User Equipment User Equipment
  • a mobile phone or "cellular” phone
  • a computer with a mobile terminal device a portable, pocket, handheld, computer built-in or in-vehicle mobile device, smart wearable device, and the like.
  • PCS Personal Communication Service
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • Smart Watches smart helmets, smart glasses, smart bracelets and other equipment.
  • the terminal device in the embodiment of the present invention may include a terminal device supporting the MF1.0 version, and a terminal device hereinafter referred to as MF1.0, and may also include a terminal device supporting the MF1.1 version, and the terminal referred to as MF1.1 hereinafter. device.
  • the terminal equipment of MF1.1 supports WCE technology.
  • a network device for example comprising a base station (e.g., an access point), may refer to a device in the access network that communicates over the air interface with the wireless terminal device over one or more sectors.
  • the base station can be used to convert the received air frame to an Internet Protocol (IP) packet as a router between the terminal device and the rest of the access network, wherein the remainder of the access network can include an IP network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in an LTE system or an evolved LTE system (LTE-A), or may also include a next generation in a 5G system
  • NodeB or eNB or e-NodeB, evolutional Node B in an LTE system or an evolved LTE system (LTE-A)
  • LTE-A evolved LTE system
  • LTE-A evolved LTE system
  • the second generation node B (gNB) is not limited in the embodiment of the present invention.
  • the terminal device will perform downlink to uplink switching in a special subframe, and the special subframe generally includes three parts, namely, a downlink part, a guard interval, and an uplink part.
  • a complete subframe that is, a subframe in which the total number of symbols included is equal to the number of symbols to be included in one subframe specified by the protocol.
  • an incomplete subframe can be understood as a subframe in which the total number of symbols included is smaller than the number of symbols to be included in one subframe specified by the protocol.
  • the incomplete subframe is different from the special subframe.
  • the number of symbols included in the special subframe is generally equal to the number of symbols to be included in one subframe specified by the protocol.
  • the downlink subframe is divided into a control domain and a data domain.
  • the control domain is used to carry the control letter Channel, for example, a Physical Control Format Indicator Channel (PCFICH) channel, a Physical Hybrid Automatic Repeat-ReQuest Indicator Channel (PHICH) channel, and a Physical Downlink Control Channel (Physical Downlink Control) Channel, PDCCH), or Common Physical Downlink Control Channel (CPDCCH).
  • the data field is used to carry a data channel, for example, a physical downlink shared channel (PDSCH) channel.
  • PDSCH physical downlink shared channel
  • a downlink control channel for carrying control information is included in the downlink control channel, for example, including a PDCCH, an Enhanced Physical Downlink Control Channel (EPDCCH), or a CPDCCH, and may also include other downlink control channels for transmitting control information.
  • channels for example, including a PDCCH, an Enhanced Physical Downlink Control Channel (EPDCCH), or a CPDCCH, and may also include other downlink control channels for transmitting control information.
  • the CPDCCH may be used to indicate information such as uplink and downlink subframe configuration, and may not carry scheduling information of the PDSCH.
  • the length of the DCI carried by the CPDCCH is the same as the length of the DCI 1C of the scheduled PDSCH.
  • the DCI for scheduling the PDSCH can have multiple formats, and 1C is one of them.
  • the DCI carried in the CPDCCH includes the following information:
  • a sub-frame configuration for LAA or MF field which generally occupies 4 bits (bits);
  • PUSCH Physical Uplink Shared Channel
  • MF-Enhanced Physical Uplink Control Channel trigger indication (ePUCCHtrigger indication)
  • this field is generally only for the MF cell (only for MF cells) field, which generally occupies 1 bit;
  • Reserved field (Reserved) field which generally occupies 4 bits.
  • the DCI payload length that the CPDCCH channel can carry is 11 bits, except for the Reserved field.
  • the Reserved field is set to ensure that the DCI length of the CPDCCH is the same as the DCI length of the normal DCI 1C format.
  • the DCI of the normal DCI 1C format used for scheduling the PDSCH channel contains 15 bits of payload information. Therefore, the CPDCCH is used.
  • the Reserved field is 4bits, that is, Reserved is set for compatibility. The protocol stipulates that when the network device sends the CPDCCH, the Reserved field will be preset to 0.
  • the value of the "Subframe configuration for LAA or MF" can indicate the number of downlink symbols included in the current subframe or the next subframe, and the terminal device can determine the downlink included in the current subframe or the next subframe by using the field.
  • the number of symbols if the current subframe or the next subframe includes the number of downlink symbols smaller than the number of downlink symbols included in the complete subframe, the terminal device may determine that the current subframe or the next subframe is a special subframe or is incomplete. Subframe. If the current subframe or the next subframe is a special subframe, the terminal device can complete the downlink to uplink handover in the special subframe. See Table 1 for the definition of the "Subframe configuration for LAA or MF" field for the MF1.0 protocol:
  • the value of the Subframe configuration for LAA or MF field in the DCI sent by the base station in the first subframe is 0000.
  • the DCI indicates the number of downlink symbols included in the next subframe. 14.
  • the CPDCCH channel and the CPDCCH DCI are equal, that is, the CPDCCH is a special common DCI, and may be carried on the PDCCH channel or on the EPDCCH channel.
  • the CPDCCH channel is not limited to a PDCCH or an EPDCCH.
  • system and “network” in the embodiments of the present invention may be used interchangeably.
  • Multiple means two or more, and in view of this, "a plurality” may also be understood as “at least two” in the embodiment of the present invention.
  • the character "/” unless otherwise specified, generally indicates that the contextual object is an "or" relationship.
  • Figure 1 includes a base station and a terminal device. It can be seen that there is an obstruction between the base station and the terminal device, so coverage enhancement is required. Otherwise, It can cause the terminal device to fail to receive or demodulate the information sent by the base station.
  • the following line control channel is an example of CPDCCH.
  • CPDCCH resources are also allocated in the data domain.
  • FIG. 2 the box on the left represents the control domain, and the frame on the right represents the data domain.
  • the unsshed portion of the domain is the allocated CPDCCH resource.
  • the CPDCCH resource allocated in the data domain may be referred to as a CPDCCH extended resource, and the CPDCCH extended resource may jointly carry the DCI with the CPDCCH resource allocated in the control domain.
  • FIG. 2 is an example in which two CPDCCH extended resources are allocated in a data domain, and is not limited to this number in practical applications.
  • the aggregation level is a concept introduced by the PDCCH/EPDCCH. For example, if the aggregation level of the PDCCH/EPDCCH is 8, the PDCCH/EPDCCH represents 8 control channel elements (CCEs)/enhanced on the time-frequency resources.
  • the Control Channel Element (eCCE) is approximately 72 Resource Element (RE).
  • the payload length is 15bits, plus a 16-bit length Cyclic Redundancy Check (CRC), the total length of the information is 31bits, and the code rate is about The code rate is much lower than the mother code by 0.33. Therefore, when resource expansion is continued for the CPDCCH, the code rate of the CPDCCH will further decrease.
  • QPSK Quadrature Phase Shift Keyin
  • the DCI can implement multiple repeated transmissions on the PDCCH of the control domain and the PDCCH of the data domain by using rate matching, thereby improving the success rate of receiving and demodulating the terminal device.
  • the terminal device of the MF1.0 can obtain the CPDCCH bearer information by detecting the CPDCCH of the control domain, for example, the DCI, and the terminal device of the MF1.1 can jointly demodulate the CPDCCH of the control domain and the CPDCCH of the data domain to obtain the CPDCCH bearer.
  • Information such as DCI, so that the terminal device of MF1.1 can be compatible with the terminal device of MF1.0 and implement coverage enhancement of CPDCCH.
  • the original CPDCCH has an aggregation level of 8.
  • the aggregation level of the CPDCCH can be expanded to 16, and in this way, the CPDCCH can be enhanced by 3 dB.
  • the aggregation level of the CPDCCH is expanded to 32, the CPDCCH can be enhanced by 6 dB.
  • the complete subframe generally includes 14 OFDM symbols, where the OFDM symbols are simply referred to as symbols herein, that is, the downlink symbols described herein may be downlink OFDM symbols, and the uplink symbols may be uplink OFDM symbols. If the number of downlink symbols of the subframe indicated by the CPDCCH is less than 14, the terminal device determines that the subframe is a special subframe or an incomplete subframe. If the subframe is a special subframe, the terminal device needs to complete the downlink to uplink handover in the special word frame.
  • the terminal device determines that the number of uplink symbols included in the special subframe is greater than or equal to 4, the terminal device A Short Physical Uplink Control Channel (SPUCCH) or a Short Physical Random Access Channel (SPRACH) may be transmitted on an uplink symbol of the special subframe.
  • SPUCCH Short Physical Uplink Control Channel
  • SPRACH Short Physical Random Access Channel
  • the "Subframe configuration for LAA or MF" field in the DCI carried by the CPDCCH is introduced. It is used to indicate the number of downlink symbols included in the current subframe or the next subframe, that is, the network device in MF1.0 advances at most 1 subframe to indicate the number of downlink symbols included in the special subframe.
  • the network device sends a CPDCCH 1 subframe in advance, for example, the CPDCCH is transmitted in the subframe n+1. Since the CPDCCH is spread and transmitted in the entire subframe n+1, the terminal device of the MF 1.1 needs to process the CPDCCH resource and the CPDCCH extended resource at least at the starting point of the subframe n+2. If the subframe n+2 is a special subframe, then at least the terminal device of MF1.1 is required to process before the uplink switching point of the special subframe. Considering the influence of algorithm delay, etc., this method has higher requirements on the processing capability of the terminal equipment of MF1.1, and has a greater challenge on reducing the cost of the terminal equipment.
  • the CPDCCH effective time point may be missed, that is, missed.
  • the uplink switching point in the special subframe does not perform the downlink to uplink switching at the correct position, resulting in a system abnormality.
  • the network device indicates the number of downlink symbols included in the n+Nth subframe in the nth subframe, and N is greater than or equal to 2, which can ensure that the terminal device can demodulate the DCI in time. Reduce the probability of system anomalies.
  • the network device is a base station
  • the downlink control channel is a CPDCCH.
  • the network device is a base station
  • the downlink control channel is a CPDCCH.
  • it is of course not limited to this in practical applications.
  • an embodiment of the present invention provides a method for indicating a subframe configuration, and a flow of the method is described as follows.
  • the base station determines, in a period of time that the channel is continuously occupied, the number of downlink symbols included in the n+Nth subframe. Where n is an integer greater than or equal to 0, and N is an integer greater than or equal to 2.
  • the period of time may be the length of time that the base station can occupy the channel. For example, the base station needs to preempt the channel. If the base station occupies the channel for a period of time, for example, after 8 ms or after 10 ms, the base station needs to release the channel. The channel, if it needs to be used, needs to be re-empted. Therefore, in the embodiment of the present invention, the method provided by the embodiment shown in FIG.
  • the base station 4 can be implemented by the base station in the process of occupying the channel, and the premise is that the nth subframe and the n+N subframes need to occupy the channel at the base station. Within the time range.
  • the duration of the channel occupied by the base station is related to the standard or protocol, and is not limited in the embodiment of the present invention.
  • the interval between the n+Nth subframe and the nth subframe is N.
  • the n+Nth subframe may be a complete subframe, or an incomplete subframe, or a special subframe, that is, the number of downlink symbols included in the n+Nth subframe may be smaller than a first preset threshold, or may be equal to
  • the first preset threshold is not limited in the embodiment of the present invention.
  • the first preset threshold is the number of downlink symbols included in the complete subframe specified by the protocol.
  • the complete subframe here may refer to a complete downlink subframe, that is, the first preset threshold may also be understood as a protocol-defined
  • the total number of symbols included in the full subframe For example, in general, the first preset threshold is 14, and it is also possible to be 12, and it is also possible to specify other values.
  • the base station sends the DCI through the CPDCCH in both the control domain and the data domain of the nth subframe, and the terminal device receives the DCI sent by the base station through the CPDCCH in both the control domain and the data domain of the nth subframe.
  • the DCI sent by the base station may be used to indicate the number of downlink symbols included in the n+N subframes.
  • the base station may send the DCI to the terminal device through the CPDCCH in both the control domain and the data domain when determining that the n+Nth subframe is a special subframe or an incomplete subframe, so that the terminal device can identify the terminal in time.
  • the base station may send the DCI to the terminal device through the CPDCCH in both the control domain and the data domain when determining that the n+N+1th subframe is an uplink subframe.
  • the n+N+1th subframe is an uplink subframe, it is possible that there are consecutive one or more uplink subframes after the uplink subframe, that is, starting from the n+N+1th subframe. That is, a continuous uplink subframe, then the first subframe of the first uplink and the subsequent uplink subframe are called a UL Burst.
  • the base station can send the DCI to the terminal device through the CPDCCH in both the control domain and the data domain when determining that the n+N+1th subframe is an uplink subframe, or in both the control domain and the data domain when determining the UL Burst.
  • the DCI is transmitted to the terminal device through the CPDCCH, and the first uplink subframe included in the UL Burst is the n+N+1th subframe. That is to say, if the n+N+1th subframe is an uplink subframe, it may be a separate uplink subframe, or may be UL Burst.
  • the base station determines that the n+N+1 subframe is an uplink subframe or the first uplink included in the UL Burst.
  • the frame is equivalent to determining that the n+Nth subframe is a special subframe, and the base station may send the DCI to the terminal device through the CPDCCH in both the control domain and the data domain of the nth subframe.
  • the DCI sent by the base station in the control domain and the DCI sent in the data domain have the same format, for example, the same DCI 1C format. That is to say, the length of the DCI transmitted in the control domain and the DCI transmitted in the data domain are the same, and the terminal device of the MF1.0 directly demodulates the DCI received from the control domain, and the terminal device of the MF1.1 is combined.
  • the DCI received from the control domain and the DCI received from the data domain are demodulated, that is, the requirements of different versions of the terminal device can be met.
  • the terminal device determines, according to the received DCI, the number of downlink symbols included in the n+Nth subframe.
  • the DCI sent by the base station needs to indicate the number of downlink symbols included in the n+N subframes determined by the base station.
  • the reserved field that has not been utilized is included in the DCI, and the embodiment of the present invention selects the number of downlink symbols included in the n+Nth subframe by using the Reserved field in the DCI. .
  • the purpose of indicating the number of downlink symbols included in the n+Nth subframe is achieved, and other information originally carried by the DCI is not affected, and the fields in the DCI are more effectively utilized, thereby improving resource utilization.
  • One way to indicate the number of downlink symbols included in the n+Nth subframe by the Reserved field in the DCI is described below.
  • the reserved field of DCI occupies 4 bits.
  • the base station can use at least one of the 4 bits occupied by the Reserved field to indicate the number of downlink symbols included in the n+N subframes.
  • the base station may use the 3 bits information in the 4 bits occupied by the Reserved field to indicate the number of downlink symbols included in the n+N subframes.
  • the bit field of the 3 bits is referred to herein as a “subframe configuration of the WCE”. For WCE)".
  • Table 2 is provided below to introduce how to indicate the number of downlink symbols included in the n+N subframes through the Subframe configuration for WCE field. It should be noted that the content included in Table 2 is only an example, and is not limited to this setting manner in practical applications, as long as the number of downlink symbols included in the n+N subframes is indicated by the Subframe configuration for WCE field. Within the scope of protection of the embodiments of the invention.
  • the number of downlink symbols included in the n+N subframes is 14.
  • the DCI carried by the CPDCCH includes the following fields:
  • the Uplink transmission duration and offset indication field occupying 5 bits
  • the MF-ePUCCH trigger indication (only for MF cells) field occupying 1 bit;
  • the DCI transmitted by the CPDCCH can determine the location of the subframe indicated by the DCI.
  • the Subframe configuration for WCE field implicitly indicates the position of the n+Nth subframe. If the n+2th subframe is a special subframe, the terminal device can determine when to go down. Received a switch for upstream transmission. Referring to FIG. 5, the base station sends a CPDCCH 2 subframes in advance, for example, the CPDCCH is transmitted in the subframe n. Even if the CPDCCH is spread and transmitted in the entire subframe n, and even if the n+2th subframe is a special subframe, the terminal device of the MF1.1 can be processed before the uplink switching point of the special subframe.
  • N is not a fixed value.
  • the base station sends the DCI to the terminal device through the CPDCCH when determining that the n+N+1th subframe is UL Burst
  • the N may not be a fixed value.
  • the base station determines that the n+2+1th subframe is UL Burst
  • the Burst will send the DCI to the terminal device through the CPDCCH, and N is equal to 3.
  • the terminal device can only determine the number of downlink symbols included in the n+N subframes through the Subframe configuration for WCE field, and cannot determine the location of the n+N subframes according to the Subframe configuration for WCE field.
  • the position that is, the value of N cannot be determined.
  • the embodiment of the present invention further utilizes other fields included in the DCI.
  • the base station indicates the location of the n+Nth subframe by using an Uplink transmission duration and offset indication field, that is, the value of N is indicated by an Uplink transmission duration and offset indication field.
  • the base station may indicate the location of the n+Nth subframe by using the uplink subframe offset information in the Uplink transmission duration and offset indication field.
  • Table 3 is provided below to describe how to indicate the location of the n+Nth subframe by using the Uplink transmission duration and offset indication field. It should be noted that the content included in Table 3 is only an example, and is not limited to such an arrangement in practical applications, as long as the location of the n+Nth subframe is indicated by the Uplink transmission duration and offset indication field. Within the scope of protection of the embodiments.
  • the value of the UL offset can be understood as the uplink subframe offset information.
  • the value of the UL offset can be understood as the above-mentioned n.
  • the DCI indicates the number of downlink symbols included in the next subframe of the nth subframe, and the UL duration
  • the value of 1 indicates that the UL Burst duration is one subframe.
  • the terminal device can determine the number of downlink symbols included in the n+N subframes through the Subframe configuration for WCE field in the DCI, and The Uplink transmission duration and offset indication field in the DCI determines the location of the n+Nth subframe. Then, the base station may perform the configuration of the number of downlink symbols indicated by the DCI in 2 subframes or more, and is not limited to the 2 subframes to notify the terminal device in advance, which is more flexible for the base station.
  • the network device indicates the number of downlink symbols included in the n+Nth subframe in the nth subframe, and N is greater than or equal to 2.
  • the terminal device can ensure that the terminal device can demodulate the DCI in time. The probability of a small system anomaly.
  • the CPDCCH resource of the MF1.0 in addition to configuring the CPDCCH resource of the MF1.0 in the control domain, the CPDCCH resource of the MF1.0 is also extended in the data domain, so that the terminal device of the MF1.0 can continue to be controlled.
  • the CPDCCH is detected in the domain, and the terminal device of the MF 1.1 can jointly demodulate the DCI by jointly controlling the CPDCCH resource in the domain and the extended CPDCCH resource in the data domain. Therefore, the embodiment shown in FIG. 4 can be compatible with the terminal device of the MF1.0, and the terminal device of the MF1.1 can also utilize the CPDCCH resource of the MF1.0 to maximize the utilization of the time-frequency resource.
  • the base station allocates the CPDCCH DCI that is the same or different from the terminal device of the MF1.0 for the terminal device of the MF1.1.
  • the main description is that the terminal device allocated by the base station to the MF1.1 is different from the terminal device of the MF1.0.
  • DCI that is, a CPDCCH resource is separately allocated to a terminal device whose data field is MF1.1 to carry a DCI transmitted to a terminal device of MF1.1.
  • the DCI here is different, mainly referring to the different formats of DCI.
  • the DCI allocated for the terminal device of the MF1.1 is no longer compatible with the DCI allocated for the terminal device of the MF1.0, and the terminal device of the MF1.1 can no longer utilize the CPDCCH resource of the terminal device of the MF1.0.
  • the CPDCCH separately allocated to the terminal device of the MF1.1 in the data domain is referred to as an enhanced Common Physical Downlink Control Channel (ECPDCCH) or an enhanced physical downlink control channel (enhanced Physical Downlink Control Channel). Control Channel, EPDCCH).
  • EPDCCH enhanced Common Physical Downlink Control Channel
  • EPDCCH enhanced Physical Downlink Control Channel
  • the base station determines the number of downlink symbols included in the n+Nth subframe. Where N is an integer greater than or equal to 2.
  • the n+Nth subframe may be a complete subframe, or an incomplete subframe, or a special subframe, that is, the number of downlink symbols included in the n+N subframe may be smaller than a first preset threshold, and It can be equal to the first preset threshold, which is not limited in the embodiment of the present invention.
  • the first preset threshold is the number of downlink symbols included in a complete subframe specified by the protocol.
  • the complete subframe here may refer to a complete downlink subframe, that is, the first preset threshold may also be understood as a protocol specification. The total number of symbols included in the complete sub-frame.
  • a normal Cyclic Prefix (NCP) subframe generally has a first preset threshold of 14, and an extended Cyclic Prefix (ECP) subframe, generally speaking,
  • a preset threshold is 12, and for other systems, it is also possible to specify other values.
  • 12 or 14 is only an example, which is a number of symbols included in a complete subframe determined according to different types of subframes.
  • the value of the first preset threshold may be different. It can be determined according to the protocol or the standard, and the embodiment of the present invention is not limited.
  • the base station sends the CPDCCH DCI through the EPDCCH in the data field of the nth subframe, and the terminal device is at the nth.
  • the data field of the subframe receives the CPDCCH DCI transmitted by the base station through the EPDCCH.
  • This DCI is hereinafter referred to as a first DCI.
  • the DCI sent by the base station may be used to indicate the number of downlink symbols included in the n+N subframes.
  • the DCI format is redesigned for the terminal device corresponding to MF1.1.
  • the DCI does not need to consider the terminal device compatible with MF1.0, and the base station can consider different versions of the terminal device when transmitting the DCI, for example,
  • the base station may send the DCI to the terminal device of the MF1.0 through the CPDCCH of the control domain.
  • the CPDCCH DCI sent by the control domain is hereinafter referred to as the second DCI, and needs to be sent to the MF1.
  • the base station may send the first DCI to the terminal device of the MF1.1 through the CPDCCH of the data domain, and the first DCI and the second DCI may be sent in one subframe, for example, all in the nth subframe.
  • the sending time of the first DCI and the second DCI and the sending order are not limited in the embodiment of the present invention.
  • the number of downlink symbols included in the n+Nth subframe may be determined by receiving the first DCI carried by the CPDCCH in the data domain.
  • the second DCI of the CPDCCH bearer in the control domain may be received, and if the base station also indicates the number of downlink symbols included in the n+Nth subframe by using the second DCI, then the MF1.0
  • the terminal device may determine, according to the second DCI, the number of downlink symbols included in the n+Nth subframe, and if the base station indicates, by the second DCI, the number of downlink symbols included in the current subframe or the next subframe, then MF1.
  • the terminal device of 0 can determine the number of downlink symbols included in the current subframe or the next subframe according to the second DCI, that is, the number of downlink symbols included in the subframe for which the second DCI is instructed by the embodiment of the present invention. No restrictions.
  • the format of the first DCI is different from the format of the second DCI, where the format of the second DCI may be the format of the DCI introduced in the foregoing clause 7) of the term in the embodiment of the present invention. Alternatively, it may be the format of the DCI introduced in the embodiment shown in FIG. 4, and is not limited herein.
  • the format of the first DCI is introduced below, that is, the fields included in the first DCI are introduced.
  • the first DCI may include the following fields:
  • MF-ePUCCH trigger indication (only for MF cells) field.
  • the PUSCH trigger B field, and the MF-ePUCCH trigger indication (only for MF cells) field refer to the DCI described in the foregoing.
  • the number of downlink symbols included in the n+Nth subframe may be indicated by using a Subframe configuration for LAA or MF field, which is indicated by a Subframe configuration for WCE field, which is introduced in the embodiment shown in FIG.
  • the Subframe configuration for LAA or MF field may occupy only 3 bits, or may be less than 3 bits, and the number of bits occupied by the first DCI is related to the indication manner. .
  • the number of bits in the first DCI for indicating the number of downlink symbols included in the n+Nth subframe is smaller than a second preset threshold, and the second preset threshold may be DCI compatible with the terminal device of the MF1.0.
  • the number of bits occupied by the Subframe configuration for LAA or MF field is, for example, 4.
  • the Reserved field is not included in the first DCI.
  • the Reserved field is reserved for compatibility consideration, that is, , is to be compatible with MF1.0 terminal equipment.
  • the compatibility situation is no longer considered, and then the Reserved field does not need to be reserved in the first DCI. Therefore, the Subframe configuration for LAA or MF field in the first DCI can occupy only 3 bits, or occupy fewer bits than 3 bits.
  • the length of the first DCI is greatly reduced relative to the length of other DCIs introduced in the previous section. For example, when the Subframe configuration for LAA or MF field occupies 3 bits, the length of the first DCI is only 10 bits. Compared with the length of 15 bits of other DCIs introduced in the foregoing, the length of the payload is reduced by 30%, which is reduced. The waste of resources and the reduction of the code rate can further achieve the purpose of coverage enhancement.
  • the terminal device determines, according to the first DCI, the number of downlink symbols included in the n+Nth subframe.
  • the foregoing describes the field included in the first DCI, and also describes how the first DCI indicates the number of downlink symbols included in the n+N subframes, and the terminal device can determine the n+N according to the first DCI after receiving the first DCI.
  • the number of downlink symbols included in a sub-frame is not limited to the first DCI.
  • FIG. 7 shows a schematic structural diagram of a communication device 700.
  • the communication device 700 can implement the functions of the network devices referred to above.
  • the communication device 700 can include a processing unit 701 and a transmitting unit 702.
  • the processing unit 701 can be used to execute S41 in the embodiment shown in FIG. 4, and/or other processes for supporting the techniques described herein.
  • Transmitting unit 702 can be used to perform S42 in the embodiment shown in FIG. 4, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • FIG. 8 shows a schematic structural diagram of a communication device 800.
  • the communication device 800 can implement the functions of the network devices referred to above.
  • the communication device 800 can include a processing unit 801 and a receiving unit 802. Wherein, the processing unit 801 can be used to execute S43 in the embodiment shown in FIG. 4, and/or other processes for supporting the techniques described herein.
  • Receiving unit 802 can be used to perform S42 in the embodiment shown in FIG. 4, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • FIG. 9 shows a schematic structural diagram of a communication device 900.
  • the communication device 900 can implement the functions of the network devices referred to above.
  • the communication device 900 can include a processing unit 901 and a transmitting unit 902.
  • the processing unit 901 can be used to execute S61 in the embodiment shown in FIG. 6, and/or other processes for supporting the techniques described herein.
  • Transmitting unit 902 can be used to perform S62 in the embodiment shown in FIG. 6, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • FIG. 10 shows a schematic structural diagram of a communication device 1000.
  • the communication device 1000 can implement the functions of the network devices referred to above.
  • the communication device 1000 can include a processing unit 1001 and a receiving unit 1002.
  • the processing unit 1001 can be used to perform S63 in the embodiment shown in FIG. 6, and/or other processes for supporting the techniques described herein.
  • the receiving unit 1002 can be used to perform S62 in the embodiment shown in FIG. 6, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • the communication device 700 to the communication device 1000 are presented in the form of dividing each functional module into individual functional modules, or may be presented in an integrated manner to divide the functional modules.
  • a “module” herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and/or other devices that provide the above functionality. .
  • ASIC application-specific integrated circuit
  • any one of the communication device 700 to the communication device 1000 can also be implemented by the structure shown in FIG.
  • the communication device 1100 may include: a memory 1101, a processor 1102, and a system bus 1103. And a communication interface 1104.
  • the processor 1102, the memory 1101, and the communication interface 1104 are connected by a system bus 1103.
  • the memory 1101 is configured to store computer execution instructions.
  • the processor 1102 executes computer execution instructions stored in the memory 1101 to cause the communication device 1100 to perform the embodiment shown in FIG. 4 or the embodiment shown in FIG.
  • the method that indicates the configuration of the subframe For a specific method for indicating the configuration of the subframe, reference may be made to the related descriptions in the above and the drawings, and details are not described herein again.
  • the communication interface 1104 can be a transceiver or an independent receiver and transmitter.
  • the transmitting unit 702 can correspond to the communication interface 1104 in FIG.
  • the processing unit 701 can be embedded in or independent of the memory 1101 of the communication device 1100 in hardware/software.
  • receiving unit 802 can correspond to communication interface 1104 in FIG.
  • the processing unit 801 can be embedded in or independent of the memory 1101 of the communication device 1100 in hardware/software.
  • the transmitting unit 902 can correspond to the communication interface 1104 in FIG.
  • the processing unit 901 can be embedded in or independent of the memory 1101 of the communication device 1100 in hardware/software.
  • receiving unit 1002 can correspond to communication interface 1104 in FIG.
  • the processing unit 1001 may be embedded in or independent of the memory 1101 of the communication device 1100 in hardware/software.
  • the communication device 1100 can be a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), and a central processing unit ( Central processor unit (CPU), network processor (NP), digital signal processor (DSP), microcontroller (micro controller unit (MCU), programmable logic controller (programmable logic) Device, PLD) or other integrated chip.
  • the communication device 1100 may also be a separate network element, such as a network device or a terminal device.
  • the communication device 700 to the communication device 1100 provided by the embodiment of the present invention can be used to perform the above-mentioned communication method. Therefore, the technical effects that can be obtained can be referred to the foregoing method embodiments, and details are not described herein again.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may 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.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another readable storage medium, for example, the computer instructions can be passed from a website site, computer, server or data center Wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a Solid State Disk (SSD)) or the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium eg, a Solid State Disk (SSD)

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Abstract

一种指示子帧配置的方法及装置，用于提高终端设备对于信息的解调成功率。其中一种指示子帧配置的方法包括：网络设备确定第n+N个子帧包括的下行符号的数量；N为大于或等于2的整数，n为大于或等于0的整数；所述网络设备在第n个子帧的控制域和数据域均通过下行控制信道发送下行控制信息DCI；所述DCI用于指示所述第n+N个子帧包括的下行符号的数量。

Description

一种指示子帧配置的方法及装置 技术领域
本发明实施例涉及通信技术领域，尤其涉及一种指示子帧配置的方法及装置。
背景技术
MF联盟(MulteFire Alliance，MFA)在长期演进(Long Term Evolution，LTE)版本(Release)14协议版本的基础上规定了非授权(unlicensed)频谱上独立部署(standalone)系统的工作机制，对应的协议版本为MF1.0。
由于standalone系统工作于许多需要深度覆盖的场景，如工厂、港口、仓库等，因此MFA在MF1.0的演进协议版本MF1.1中已经将宽带覆盖增强(Wideband Coverage Extension，WCE)作为工作项目(Work Item，WI)立项。
由于频谱法规对于unlicensed频谱上的发送功率的限制，相对于上行信道，WCE中下行信道覆盖受限。因此，目前主要聚焦于对下行信道的覆盖增强。根据MFA目前达成的结论，MF1.1的下行信道的工作点需要在MF1.0的下行信道工作点的基础上增强8dB，即，MF1.1的设备能够检测的下行信道的信号与干扰加噪声比(Signal to Interference plus Noise Ratio，SINR)需要降低8dB。显然，MF1.1的终端设备对于下行信道的SINR的要求要高于MF1.0的终端设备。
这样就存在一个问题，如果基站是通过MF1.0的下行信道发送信息，例如通过MF1.0的下行控制信道发送下行控制信息(Downlink Control Information，DCI)，由于MF1.0的下行控制信道的工作点SINR比较高，则MF1.1的终端设备就无法解调通过MF1.0的下行控制信道发送的DCI，从而导致MF1.1的终端设备会遗漏信息。
发明内容
本发明实施例提供一种指示子帧配置的方法及装置，用于提高终端设备对于信息的解调成功率。
第一方面，提供一种指示子帧配置的方法，该方法可由网络设备执行，具体的，可由网络设备中的通信装置执行。该网络设备例如为基站，通信装置可以是网络设备本身，或者是网络设备中的功能模块。该方法包括：网络设备确定第n+N个子帧包括的下行符号的数量，该网络设备在第n个子帧的控制域和数据域均通过下行控制信道发送DCI。其中，n为大于或等于0的整数，N为大于或等于2的整数，DCI用于指示第n+N个子帧包括的下行符号的数量。
本发明实施例中，网络设备在控制域和数据域上均通过下行控制信道发送DCI，相当于为下行控制信道分配了更多的物理资源，从而达到了覆盖增强的目的。对于MF1.1的终端设备来说，可以联合控制域的下行控制信道和扩展的下行控制信道解调得到下行控制信道DCI，提高了终端设备对于信息的解调成功率。
另外，由于进行了覆盖增强，则下行控制信道会在整个子帧n中扩展发送，如果在第n个子帧指示的是第n个子帧包括的下行符号的数量，或者指示的是第n+1个子帧包括的下行符号的数量，则覆盖增强的终端设备需要在第n+1个子帧的起始点才可以处理扩展后 的下行控制信道承载的信息。考虑算法时延等影响，即使终端设备能够正确解调DCI，但可能已经错过了DCI指示的符号的生效时间点，例如，DCI指示的第n个子帧或第n+1个子帧为特殊子帧，终端设备需在特殊子帧中进行下行到上行的切换，然而由于终端设备处理不及时，没能在正确的位置进行下行到上行的切换，可能导致系统异常。考虑到这一点，本发明实施例中，网络设备会在第n个子帧指示第n+N个子帧包括的下行符号的数量，N大于或等于2，可以保证终端设备能够及时解调DCI，减小系统异常的概率。
在一个可能的设计中，DCI通过DCI中的预留位指示第n+N个子帧包括的下行符号的数量。
为了与MF1.0的终端设备兼容，在DCI中设置了Reserved字段，目前对于Reserved字段尚未加以利用。那么本发明实施例就利用Reserved字段来指示第n+N个子帧包括的下行符号的数量，提高了资源的利用率。例如Reserved字段包括4个bits，那么本发明实施例可利用其中的至少一个比特来指示第n+N个子帧包括的下行符号的数量。关于具体利用其中的多少个比特来指示第n+N个子帧包括的下行符号的数量，本发明实施例不作限制。
在一个可能的设计中，第n+N个子帧包括的下行符号的数量小于第一预设阈值。第一预设阈值为一个完整子帧包括的下行符号的数量。
如果第n+N个子帧包括的下行符号的数量小于第一预设阈值，那么表明第n+N个子帧是不完整子帧，如果第n+N个子帧是不完整子帧，那么就有可能是特殊子帧，而终端设备需要在特殊子帧的上行切换点完成下行到上行的切换。如果在第n个子帧发送的DCI指示的当前子帧或下一个子帧包括的下行符号的数量，那么如果当前子帧或下一个子帧是特殊子帧，则终端设备在特殊子帧的上行切换点到来时可能还来不及将接收的DCI解调完毕，这样可能就会错过上行切换点，即在上行切换点不能完成下行到上行的切换，这样就可能导致系统紊乱。因此本发明实施例中，至少提前2个子帧来通知终端设备第n+N个子帧包括的下行符号的数量，从而给终端设备足够的时间进行下行到上行的切换，保障系统正常运行。
在一个可能的设计中，一个完整子帧为扩展循环前缀的子帧，则第一预设阈值为12，或者一个完整子帧为正常循环前缀的子帧，则第一预设阈值为14。
这里的12或14只是举例，是根据不同类型的子帧所确定的完整子帧包含的符号数，在子帧的类型不同时，第一预设阈值的取值可能就会有所不同，具体可根据协议或标准确定，本发明实施例不作限制。
在一个可能的设计中，网络设备还可以确定第n+N+1个子帧为上行子帧。
其中，第n+N+1个子帧可以是单独的上行子帧，或者也可以是UL Burst包括的第一个上行子帧。一般来说，上行子帧或UL Burst的前一个子帧都会是特殊子帧，那么，基站如果确定第n+N+1个子帧是上行子帧或者是UL Burst包括的第一个上行子帧，也就相当于确定了第n+N个子帧是特殊子帧，则基站可以在第n个子帧的控制域和数据域均向终端设备发送CPDCCH DCI，以使得终端设备能够及时解调DCI。
第二方面，提供一种指示子帧配置的方法，该方法可由终端设备执行，具体的，可由终端设备中的通信装置执行。通信装置可以是终端设备本身，或者是终端设备中的功能模块。该方法包括：终端设备在第n个子帧的控制域和数据域均通过下行控制信道接收DCI。终端设备根据DCI确定第n+N个子帧包括的下行符号的数量。n为大于或等于0的整数，N为大于或等于2的整数。
第二方面所提供的方法与第一方面所提供的方法可理解为相应的方法，即，第一方面提供的方法介绍了网络设备如何处理，则第二方面的方法就介绍了对应的终端设备如何处理。
在一个可能的设计中，终端设备根据DCI确定第n+N个子帧包括的下行符号的数量，包括：终端设备根据DCI中的预留位的指示确定第n+N个子帧包括的下行符号的数量。
在第一方面介绍了，网络设备可利用DCI中的Reserved字段来指示第n+N个子帧包括的下行符号的数量，那么终端设备就可以通过接收的DCI中的Reserved字段来确定第n+N个子帧包括的下行符号的数量。通过这种方式指示，提高了资源的利用率，且方式较为简单，易于实现。
在一个可能的设计中，终端设备还根据DCI携带的上行子帧偏移信息确定第n+N个子帧所在的位置。上行子帧偏移信息用于指示N的取值。
如果N不是固定值，例如网络设备如果在确定第n+N+1个子帧是UL Burst包括的第一个上行子帧时向终端设备发送CPDCCH DCI，此时N就可以不是固定值。在这种情况下，终端设备除了要根据Rerserved字段确定第n+N个子帧包括的下行符号的数量之外，还要根据其他字段确定第n+N个子帧所在的位置，即确定N的取值。因此本发明实施例还可以在DCI中携带上行子帧偏移信息，通过上行子帧偏移信息就可以指示第n+N个子帧所在的位置，那么终端设备根据接收的DCI中的上行子帧偏移信息就可以确定第n+N个子帧所在的位置。则网络设备可以可以提前2个子帧或更多子帧进行配置DCI所指示的下行符号的数量，不限定于提前2个子帧通知终端设备，对于网络设备来说更为灵活。
在一个可能的设计中，第n+N个子帧包括的下行符号的数量小于第一预设阈值，第一预设阈值为一个完整子帧包括的下行符号的数量。
在一个可能的设计中，一个完整子帧为扩展循环前缀的子帧，则第一预设阈值为12，或者一个完整子帧为正常循环前缀的子帧，则第一预设阈值为14。
在一个可能的设计中，终端设备确定第n+N+1个子帧为上行子帧。
例如，N不是固定值，即，终端设备除了要根据Rerserved字段确定第n+N个子帧包括的下行符号的数量之外，还要根据其他字段确定第n+N个子帧所在的位置，那么终端设备就可以确定第n+N+1个子帧为上行子帧。如果第n+N+1个子帧是UL Burst包括的第一个上行子帧，那么终端设备还能确定该UL Burst。
第三方面，提供一种指示子帧配置的方法，该方法可由网络设备执行，具体的，可由网络设备中的通信装置执行。该网络设备例如为基站，通信装置可以是网络设备本身，或者是网络设备中的功能模块。该方法包括：网络设备确定第n+N个子帧包括的下行符号的数量，网络设备在第n个子帧的数据域通过下行控制信道发送第一DCI。其中，N为大于或等于2的整数，n为大于或等于0的整数，第一DCI用于指示第n+N个子帧包括的下行符号的数量。
第一DCI相当于是为MF1.1的终端设备重新设计的DCI，而在控制域发送的DCI是为MF1.0的终端设备设计的DCI，那么，如果需要给MF1.1的终端设备发送DCI，则网络设备无需在控制域和数据域都发送DCI，而只需在数据域发送DCI即可，节省了传输资源。
在一个可能的设计中，第一DCI中用于指示第n+N个子帧包括的下行符号的数量的比特数小于第二预设阈值。
在本发明实施例中，在第一DCI中，可以利用3bits或更少的比特来指示第n+N个子帧包 括的下行符号的数量，具体占用的比特数与指示方式有关。也就是说，第一DCI中用于指示第n+N个子帧包括的下行符号的数量的比特数小于第二预设阈值，第二预设阈值可以是与MF1.0的终端设备兼容的DCI中的Subframe configuration for LAA or MF字段占用的比特数，例如为4。可见，第一DCI在达到指示第n+N个子帧包括的下行符号的数量的目的的同时，还进一步节省了传输资源。
在一个可能的设计中，网络设备在第n个子帧的控制域通过下行控制信道发送第二DCI。其中，第一DCI与第二DCI的格式不同。
在本发明实施例中，相当于为MF1.1的终端设备重新设计了DCI，即第一DCI，该第一DCI无需考虑兼容MF1.0的终端设备，那么网络设备在发送DCI时可以考虑不同版本的终端设备，例如，在需要向MF1.0的终端设备发送DCI时，网络设备可通过控制域的下行控制信道向MF1.0的终端设备发送DCI，下文中将通过控制域发送的DCI称为第二DCI，在需要向MF1.1的终端设备发送DCI时，网络设备可通过数据域的下行控制信向MF1.1的终端设备发送第一DCI，第一DCI和第二DCI可以在一个子帧中发送，例如都在第n个子帧里发送，或者也可以在不同的子帧中发送，本发明实施例对于第一DCI和第二DCI的发送时间以及发送顺序不作限制。总之第一DCI和第二DCI是两个独立的部分，互不干扰，更加便于网络设备进行管理。另外，因为第一DCI是专门为MF1.1的终端设备设计的，因此第一DCI与第二DCI的格式是不同的。
在一个可能的设计中，第一DCI的长度小于第二DCI的长度。
第二DCI是MF1.1的终端设备对应的DCI，其中是包括Reserved字段的，而第一DCI则可以不包括Reserved字段了。原因在于，在第二DCI中之所以保留了Reserved字段，是为了兼容考虑的，即，是为了兼容MF1.0的终端设备。而本发明实施例已经不再考虑兼容的情况，那么第一DCI中也就无需再保留Reserved字段。相对于第二DCI的长度来说，净荷的长度有所下降，减少了资源的浪费，降低码率，可以进一步达到覆盖增强目的。
第四方面，提供一种指示子帧配置的方法，该方法可由终端设备执行，具体的，可由终端设备中的通信装置执行。通信装置可以是终端设备本身，或者是终端设备中的功能模块。该方法包括：终端设备在第n个子帧的数据域通过下行控制信道接收网络设备发送的第一下行控制信息DCI，终端设备根据第一DCI确定第n+N个子帧包括的下行符号的数量，n为大于或等于0的整数，N为大于或等于2的整数。
第四方面所提供的方法与第三方面所提供的方法可理解为相应的方法，即，第三方面提供的方法介绍了网络设备如何处理，则第四方面的方法就介绍了对应的终端设备如何处理。
在一个可能的设计中，终端设备根据第一DCI携带的上行子帧偏移信息确定第n+N个子帧所在的位置。上行子帧偏移信息用于指示N的取值。
在第三方面介绍了，第一DCI除了可以指示第n+N个子帧包括的下行符号的数量之外，还可以通过上行子帧偏移信息来指示N的取值，那么终端设备接收第一DCI后，就可以根据第一DCI携带的上行子帧偏移信息确定N的取值，方式较为简单。
在一个可能的设计中，第一DCI中用于指示第n+N个子帧包括的下行符号的数量的比特数小于第二预设阈值。
在一个可能的设计中，终端设备在第n个子帧的控制域通过下行控制信道接收网络设备发送的第二DCI。其中，第一DCI与第二DCI的格式不同。
在第三方面介绍了，例如，在需要向MF1.0的终端设备发送DCI时，网络设备可通过控制域的下行控制信道向MF1.0的终端设备发送第二DCI，则MF1.0的终端设备或MF1.1的终端设备就可以在控制域接收第二DCI，在需要向MF1.1的终端设备发送DCI时，网络设备可通过数据域的下行控制信向MF1.1的终端设备发送第一DCI，则MF1.1的终端设备就可以在数据域接收第一DCI。如果第一DCI和第二DCI在一个子帧中发送，则终端设备就在一个子帧里接收第一DCI和第二DCI，或者第一DCI和第二DCI是在不同的子帧中发送，则终端设备就在不同的子帧里接收第一DCI和第二DCI，本发明实施例不作限制。
在一个可能的设计中，第一DCI的长度小于第二DCI的长度。
第五方面，提供一种通信装置。该通信装置具有实现上述方法设计中网络设备的功能。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单元。
在一个可能的设计中，通信装置的具体结构可包括处理单元和发送单元。处理单元和发送单元可执行上述第一方面或第一方面的任意一种可能的设计所提供的方法中的相应功能。
第六方面，提供一种通信装置。该通信装置具有实现上述方法设计中终端设备的功能。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单元。
在一个可能的设计中，通信装置的具体结构可包括处理单元和接收单元。处理单元和接收单元可执行上述第二方面或第二方面的任意一种可能的设计所提供的方法中的相应功能。
第七方面，提供一种通信装置。该通信装置具有实现上述方法设计中网络设备的功能。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单元。
在一个可能的设计中，通信装置的具体结构可包括处理单元和发送单元。处理单元和发送单元可执行上述第三方面或第三方面的任意一种可能的设计所提供的方法中的相应功能。
第八方面，提供一种通信装置。该通信装置具有实现上述方法设计中终端设备的功能。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单元。
在一个可能的设计中，通信装置的具体结构可包括处理单元和接收单元。处理单元和接收单元可执行上述第四方面或第四方面的任意一种可能的设计所提供的方法中的相应功能。
第九方面，提供一种通信装置。该通信装置可以为网络设备，或者为设置在网络设备中的芯片等功能模块。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，所述指令使通信装置执行上述第一方面或第一方面的任意一种可能的设计中网络设备所执行的方法。
第十方面，提供一种通信装置。该通信装置可以为终端设备，或者为设置在终端设备中的芯片等功能模块。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括 指令，当处理器执行所述指令时，所述指令使通信装置执行上述第二方面或第二方面的任意一种可能的设计中终端设备所执行的方法。
第十一方面，提供一种通信装置。该通信装置可以为网络设备，或者为设置在网络设备中的芯片等功能模块。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，所述指令使通信装置执行上述第三方面或第三方面的任意一种可能的设计中网络设备所执行的方法。
第十二方面，提供一种通信装置。该通信装置可以为终端设备，或者为设置在终端设备中的芯片等功能模块。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，所述指令使通信装置执行上述第四方面或第四方面的任意一种可能的设计中终端设备所执行的方法。
第十三方面，提供一种计算机存储介质，用于存储为上述第五方面所描述的通信装置或第九方面所描述的通信装置所用的计算机软件指令，并包含用于执行上述第一方面或第一方面的任意一种可能的设计中为网络设备所设计的程序。
第十四方面，提供一种计算机存储介质，用于存储为上述第六方面所描述的通信装置或第十方面所描述的通信装置所用的计算机软件指令，并包含用于执行上述第二方面或第二方面的任意一种可能的设计中为终端设备所设计的程序。
第十五方面，提供一种计算机存储介质，用于存储为上述第七方面所描述的通信装置或第十一方面所描述的通信装置所用的计算机软件指令，并包含用于执行上述第一方面或第一方面的任意一种可能的设计中为网络设备所设计的程序。
第十六方面，提供一种计算机存储介质，用于存储为上述第八方面所描述的通信装置或第十二方面所描述的通信装置所用的计算机软件指令，并包含用于执行上述第四方面或第四方面的任意一种可能的设计中为终端设备所设计的程序。
第十七方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第一方面或第一方面的任意一种可能的设计中所述的方法。
第十八方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第二方面或第二方面的任意一种可能的设计中所述的方法。
第十九方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第三方面或第三方面的任意一种可能的设计中所述的方法。
第二十方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第四方面或第四方面的任意一种可能的设计中所述的方法。
本发明实施例中，网络设备会在第n个子帧指示第n+N个子帧包括的下行符号的数量，N大于或等于2，可以保证终端设备能够及时解调DCI，减小系统异常的概率。
附图说明
图1为本发明实施例的一种应用场景示意图；
图2为本发明实施例提供的在数据域对CPDCCH资源进行扩展的示意图；
图3为本发明实施例提供的DCI指示下一个子帧包括的下行符号的数量时终端设备的处理过程的示意图；
图4为本发明实施例提供的一种指示子帧配置的方法的流程图；
图5为本发明实施例提供的DCI指示第n+2个子帧包括的下行符号的数量时终端设备的处理过程的示意图；
图6为本发明实施例提供的一种指示子帧配置的方法的流程图；
图7～11为本发明实施例提供的通信装置的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
以下，对本发明实施例中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，是指向用户提供语音和/或数据连通性的设备，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交换语音和/或数据。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、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、接入点(Access Point，AP)、远程终端设备(Remote Terminal)、接入终端设备(Access Terminal)、用户终端设备(User Terminal)、用户代理(UserAgent)、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、计算机内置的或者车载的移动装置，智能穿戴式设备等。例如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)、智能手表、智能头盔、智能眼镜、智能手环等设备。
本发明实施例中的终端设备，可包括支持MF1.0版本的终端设备，下文中简称MF1.0的终端设备，也可包括支持MF1.1版本的终端设备，下文中简称MF1.1的终端设备。其中，MF1.1的终端设备支持WCE技术。
2)网络设备，例如包括基站(例如，接入点)，可以是指接入网中在空中接口上通过一个或多个扇区与无线终端设备通信的设备。基站可用于将收到的空中帧与网际协议(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。基站还可协调对空中接口的属性管理。例如，基站可以包括LTE系统或演进的LTE系统(LTE-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5G系统中的下一代节点B(next generation node B，gNB)，本发明实施例并不限定。
3)特殊子帧。终端设备在特殊子帧中将进行下行到上行的切换，特殊子帧一般包括三个部分，分别为下行部分、保护间隔、以及上行部分。
4)完整子帧，即，包括的符号的总数量与协议规定的一个子帧需包括的符号的数量相等的子帧。相应的，不完整子帧，就可以理解为包括的符号的总数量小于协议规定的一个子帧需包括的符号的数量的子帧。且不完整子帧与特殊子帧不同，特殊子帧包括的符号的数量一般等于协议规定的一个子帧需包括的符号的数量。
5)在LTE/MF协议中，下行子帧分为控制域和数据域。其中，控制域用于承载控制信 道，例如承载物理控制格式指示信道(Physical Control Format Indicator Channel，PCFICH)信道、物理混合自动重传请求指示信道(Physical Hybrid Automatic Repeat-reQuest Indicator Channel，PHICH)信道、物理下行控制信道(Physical Downlink Control Channel，PDCCH)、或公共物理下行控制信道(Common Physical Downlink Control Channel，CPDCCH)等。数据域用于承载数据信道，例如承载物理下行共享信道(Physical Downlink Shared Channel，PDSCH)信道。
6)下行控制信道，用于承载控制信息。本文不限制下行控制信道究竟包括哪些信道，例如包括PDCCH、增强的物理下行控制信道(Enhanced Physical Downlink Control Channel，EPDCCH)、或CPDCCH，还可包括其他用于传输控制信息的下行控制信道。
7)CPDCCH，作为一种特殊的公共DCI，可用来指示上下行子帧配置等信息，可以不承载PDSCH的调度信息。其中，CPDCCH承载的DCI长度与调度PDSCH的DCI 1C的长度相同。其中，调度PDSCH的DCI可以有多种格式，1C是其中的一种格式。具体的，在MF协议中，CPDCCH中承载的DCI包括如下信息：
(1)授权辅助接入或MF的子帧配置(Subframe configuration for LAA or MF)字段，该字段一般占用4比特(bits)；
(2)上行传输持续时间以及偏移指示(Uplink transmission duration and offset indication)字段，该字段一般占用5bits；
(3)物理上行共享信道(Physical Uplink Shared Channel，PUSCH)触发(trigger)B字段，该字段一般占用1bit；
(4)MF-增强的物理上行控制信道触发指示(EnhancedPhysical Uplink Control Channel trigger indication，ePUCCHtrigger indication)，该字段一般只针对MF小区(only for MF cells)字段，该字段一般占用1bit；
(5)预留位(Reserved)字段，该字段一般占用4bit。
可以看出，除了Reserved字段之外，CPDCCH信道能够承载的DCI净荷长度为11bits。其中，Reserved字段是为了保证CPDCCH承载的DCI长度与普通的DCI 1C格式承载的DCI长度相同而设置的，用于调度PDSCH信道的普通的DCI 1C格式的DCI包含15bits的净荷信息，因此，CPDCCH的Reserved字段为4bits，即Reserved是为了兼容而设置。协议规定，网络设备发送CPDCCH时，该Reserved字段将预置为0。
其中，“Subframe configuration for LAA or MF”的取值就能指示当前子帧或下一个子帧包括的下行符号的数量，则终端设备可以通过该字段确定当前子帧或下一个子帧包括的下行符号的数量，如果当前子帧或下一个子帧包括的下行符号的数量小于完整子帧包括的下行符号的数量，那么终端设备可确定当前子帧或下一个子帧是特殊子帧或不完整子帧。如果当前子帧或下一个子帧是特殊子帧，则终端设备就可以在该特殊子帧完成下行到上行的切换。请参见表1，为MF1.0协议对于“Subframe configuration for LAA or MF”字段的定义：
表1
Figure PCTCN2017080965-appb-000001
例如，基站在第1个子帧发送的DCI中的Subframe configuration for LAA or MF字段的取值为0000，根据表1可知，该DCI指示的是下一个子帧包括的下行符号的数量，该数量为14。
需要说明的是，某些场景下，CPDCCH信道与CPDCCH DCI是可以等同的，即CPDCCH为一种特殊的公共DCI，可以承载在PDCCH信道，也可以承载在EPDCCH信道。CPDCCH信道不限定是PDCCH还是EPDCCH。
8)本发明实施例中的术语“系统”和“网络”可被互换使用。“多个”是指两个或两个以上，鉴于此，本发明实施例中也可以将“多个”理解为“至少两个”。“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这三种情况。另外，字符“/”，如无特殊说明，一般表示前后关联对象是一种“或”的关系。
如上介绍了本发明实施例涉及的一些概念，下面介绍本发明实施例的一种应用场景。其中，本发明实施例可以用于MF需要覆盖增强的系统。MF部署在unlicensed频谱中，存在一些需要深度覆盖的需求，此时就需要进行覆盖增强，可参考图1。图1中包括基站和终端设备，可以看到，在基站和终端设备之间存在遮挡物，因此就需要进行覆盖增强，否则可 能导致终端设备无法接收或无法解调基站发送的信息。
接下来如何对下行控制信道进行覆盖增强，以尽量保证MF1.1的终端设备能够成功解调下行控制信道承载的DCI。在这里的介绍过程中，以下行控制信道是CPDCCH为例。
为了对CPDCCH进行覆盖增强，除了在控制域分配CPDCCH资源外，在数据域也分配CPDCCH资源，请参考图2，图2中，左边的方框代表控制域，右边的外框代表数据域，数据域中未划斜线的部分就是分配的CPDCCH资源。其中，数据域中分配的CPDCCH资源可称为CPDCCH扩展资源，CPDCCH扩展资源可与控制域中分配的CPDCCH资源共同承载DCI。图2中是以在数据域中分配了两份CPDCCH扩展资源为例，在实际应用中不限于此数量。
通过这种方式，为CPDCCH分配了更多的物理资源，即提高了CPDCCH的聚合等级。由于聚合等级增加，而DCI的长度不变，相当于降低了码率，从而达到了覆盖增强的目的。其中，聚合等级是PDCCH/EPDCCH引入的概念，例如，若PDCCH/EPDCCH的聚合等级为8，则代表PDCCH/EPDCCH在时频资源上占用8个控制信道单元(Control Channel Element，CCE)/增强的控制信道单元(EnhancedControl Channel Element，eCCE)，大概为72个资源单元(Resource Element，RE)。
以MF1.0的CPDCCH为例。如果聚合等级为8，相当于分配了8*72个RE，按照正交相移键控(Quadrature Phase Shift Keyin，QPSK)方式调制，可以承载的比特数为8*72*2＝1152bits，DCI 1C的净荷长度为15bits，加上16bits长度的循环冗余校验(Cyclic Redundancy Check，CRC)，则信息的总长度为31bits，码率约为
Figure PCTCN2017080965-appb-000002
远低于母码的码率0.33。因此，当继续对CPDCCH进行资源扩展时，CPDCCH的码率将进一步下降。如果控制域的CPDCCH和数据域的CPDCCH承载相同内容的DCI，则通过速率匹配，DCI可以在控制域的PDCCH和数据域的PDCCH上实现多次重复发送，提高终端设备的接收和解调成功率。
因此，MF1.0的终端设备可以通过检测控制域的CPDCCH来得到该CPDCCH承载的信息，例如DCI，MF1.1的终端设备可以联合控制域的CPDCCH和数据域的CPDCCH来解调得到CPDCCH承载的信息，例如DCI，从而MF1.1的终端设备可以兼容MF1.0的终端设备，并实现CPDCCH的覆盖增强。例如，原有的CPDCCH的聚合等级为8，通过在数据域对CPDCCH进行资源扩展，可以将CPDCCH的聚合等级扩大到16，通过这种方式，可以将CPDCCH增强3dB。同理，如果CPDCCH的聚合等级扩大到32，则可以将CPDCCH增强6dB。
按照协议的规定，完整子帧一般包括14个OFDM符号，其中在本文中将OFDM符号简称为符号，即本文所述的下行符号，可以是下行OFDM符号，上行符号可以是上行OFDM符号。如果CPDCCH指示的子帧的下行符号的数量小于14，则终端设备确定该子帧为特殊子帧或不完整子帧。如果该子帧为特殊子帧，那么终端设备需要在该特殊字帧完成下行到上行的切换，进一步的，如果终端设备确定该特殊子帧包括的上行符号的数量大于或等于4，则终端设备可以在该特殊子帧的上行符号上发送短物理上行控制信道(Short Physical Uplink Control Channel，sPUCCH)或短物理随机接入信道(Short Physical Random Access Channel，sPRACH)。
在前文中介绍了CPDCCH承载的DCI中，“Subframe configuration for LAA or MF”字段 用于指示当前子帧或下一个子帧包括的下行符号的数量，即MF1.0中网络设备最多提前1个子帧指示特殊子帧包括的下行符号的数量。
那么请参考图3，网络设备提前1个子帧发送CPDCCH，例如CPDCCH在子帧n+1发送。由于CPDCCH在整个子帧n+1中扩展发送，因此MF1.1的终端设备至少需要在子帧n+2的起始点才可以处理CPDCCH资源和CPDCCH扩展资源。如果子帧n+2是特殊子帧，那么至少要求MF1.1的终端设备在特殊子帧的上行切换点之前处理完毕。考虑到算法时延等影响，这种方式对MF1.1的终端设备的处理能力要求较高，对降低终端设备的成本挑战较大。也就是说，如果只是通过这种方式对CPDCCH进行增强，却不考虑终端设备的处理能力，那么即使MF1.1的终端设备能够正确解调CPDCCH，但可能已经错过了CPDCCH生效时间点，即错过了特殊子帧中的上行切换点，没有在正确的位置进行下行到上行的切换，从而导致系统异常。
考虑到这一点，本发明实施例中，网络设备会在第n个子帧指示第n+N个子帧包括的下行符号的数量，N大于或等于2，可以尽量保证终端设备能够及时解调DCI，减小系统异常的概率。
下面结合附图介绍本发明实施例提供的技术方案，在下文的介绍过程中，以本发明实施例提供的技术方案应用在图1所示的应用场景、网络设备是基站、下行控制信道是CPDCCH为例，在实际应用中当然不限于此。
请参见图4，本发明一实施例提供一种指示子帧配置的方法，该方法的流程描述如下。
S41、基站在连续占用信道的一段时间内，确定第n+N个子帧包括的下行符号的数量。其中，n为大于或等于0的整数，N为大于或等于2的整数。这里的一段时间，可以是指基站能够占用信道的时长，例如，基站需要抢占信道，如果成功抢占，那么基站占用信道，而基站占用信道一段时间之后，例如8ms之后或者10ms之后，基站就需要释放信道，如果还需使用，则需要重新抢占。因此本发明实施例中，基站在占用信道的过程中都可以实施图4所示的实施例提供的方法，另外前提是，第n个子帧和第n+N个子帧都需要在基站占用信道的时间范围内。其中，基站占用信道的时长与标准或协议的规定有关，本发明实施例不作限制。
其中，第n+N个子帧与第n个子帧的间隔是N。第n+N个子帧可以是完整子帧，或者是不完整子帧，或者是特殊子帧，即，第n+N个子帧包括的下行符号的数量可以小于第一预设阈值，也可以等于第一预设阈值，本发明实施例不作限制。其中，第一预设阈值是协议规定的完整子帧包括的下行符号的数量，这里的完整子帧，可以是指完整的下行子帧，即，第一预设阈值也可以理解为协议规定的完整子帧包括的符号的总数量。例如，一般来说第一预设阈值为14，也有可能为12，还有可能规定为其他的取值。
S42、基站在第n个子帧的控制域和数据域均通过CPDCCH发送DCI，则终端设备在第n个子帧的控制域和数据域都通过CPDCCH接收基站发送的DCI。其中，基站发送的DCI就可以用于指示第n+N个子帧包括的下行符号的数量。
在一种实施方式中，基站可以在确定第n+N个子帧是特殊子帧或不完整子帧时在控制域和数据域均通过CPDCCH向终端设备发送DCI，这样可以使得终端设备及时识别第n+N个子帧包括的下行符号的数量，以进行相应的处理。如果基站确定第n+N个子帧是完整子帧，那么基站可以在控制域和数据域均通过CPDCCH向终端设备发送DCI，或者也可以不向终端设备发送DCI，具体可按照协议或标准的规定执行，或者按照基站的配置执行。
在另一种实施方式中，基站可以在确定第n+N+1个子帧是上行子帧时在控制域和数据域均通过CPDCCH向终端设备发送DCI。特别的，如果第n+N+1个子帧是上行子帧，那么有可能在该上行子帧之后还有连续的一个或多个上行子帧，即，从第n+N+1个子帧开始就是连续的上行子帧，那么，开始发送的第1个上行的完整子帧以及之后连续的上行子帧，称为一个UL Burst。则，基站既可以在确定第n+N+1个子帧是上行子帧时在控制域和数据域均通过CPDCCH向终端设备发送DCI，也可以在确定有UL Burst时在控制域和数据域均通过CPDCCH向终端设备发送DCI，该UL Burst包括的第一个上行子帧就是第n+N+1个子帧。也就是说，第n+N+1个子帧如果是上行子帧，那么它可能是单独的上行子帧，或者也可能是UL Burst。因为一般来说，上行子帧或者UL Burst的前一个子帧都会是特殊子帧，那么，基站如果确定第n+N+1个子帧是上行子帧或者是UL Burst包括的第一个上行子帧，也就相当于确定了第n+N个子帧是特殊子帧，则基站可以在第n个子帧的控制域和数据域均通过CPDCCH向终端设备发送DCI。
基站在控制域发送的DCI和在数据域发送的DCI，格式相同，例如同为DCI 1C格式。也就是说，在控制域发送的DCI和在数据域发送的DCI的长度是相同的，则MF1.0的终端设备直接解调从控制域接收的DCI即可，MF1.1的终端设备就联合解调从控制域接收的DCI和从数据域接收的DCI，即，能够满足不同版本的终端设备的需求。
S43、终端设备根据接收的DCI确定第n+N个子帧包括的下行符号的数量。
本发明实施例中，基站发送的DCI需指示基站确定的第n+N个子帧包括的下行符号的数量。根据前文对于DCI包括的字段的介绍可知，在DCI中包括了尚未被利用的Reserved字段，那么本发明实施例就选择通过DCI中的Reserved字段来指示第n+N个子帧包括的下行符号的数量。如此，既实现了指示第n+N个子帧包括的下行符号的数量的目的，又不影响DCI原本承载的其他信息，而且也更加有效地利用了DCI中的字段，提高了资源的利用率。下面介绍通过DCI中的Reserved字段来指示第n+N个子帧包括的下行符号的数量的一种方式。
在前文中已经介绍了，DCI的Reserved字段占用4bits。那么基站可以利用Reserved字段占用的4bits中至少一个bit来指示第n+N个子帧包括的下行符号的数量。作为一个示例，基站可以利用Reserved字段占用的4bits中的3bits信息来指示第n+N个子帧包括的下行符号的数量，本文中将该3bits的位域称为“WCE的子帧配置(Subframe configuration for WCE)”。
为了更好地理解，下面提供表2，用于介绍如何通过Subframe configuration for WCE字段来指示第n+N个子帧包括的下行符号的数量。需注意的是，表2包括的内容只是举例，在实际应用中不限于此种设置方式，只要是通过Subframe configuration for WCE字段指示第n+N个子帧包括的下行符号的数量的方式均在本发明实施例的保护范围之内。
表2
Figure PCTCN2017080965-appb-000003
Figure PCTCN2017080965-appb-000004
例如，DCI中的Subframe configuration for WCE字段的取值为000，那么根据表2可知，第n+N个子帧包括的下行符号的数为14。
根据如前的介绍可知，在本发明实施例中，CPDCCH承载的DCI包括如下字段：
占用4bits的Subframe configuration for LAA or MF字段；
占用5bits的Uplink transmission duration and offset indication字段；
占用1bits的PUSCH trigger B字段；
占用1bits的MF-ePUCCH trigger indication(only for MF cells)字段；
占用3bits的Subframe configuration for WCE字段；
占用1bits的Reserved字段。
在一种实施方式中，N为固定值，例如N＝2，也就是基站只要在第n个子帧通过CPDCCH发送DCI，那么所发送的DCI固定指示的就是第n+2个子帧包括的下行符号的数量。那么，只要终端设备接收了基站通过CPDCCH发送的DCI，就可以知道DCI中的Subframe configuration for WCE字段指示的是第n+2个子帧包括的下行符号的数量，相当于，只要终端设备接收了基站通过CPDCCH发送的DCI，就可以确定该DCI所指示的子帧所在的位置。因此在这种情况下，Subframe configuration for WCE字段是隐性地指示了第n+N个子帧的位置，如果第n+2个子帧是特殊子帧，那么终端设备也就可以确定何时进行下行接收到上行发送的切换。请参见图5，基站提前2个子帧发送CPDCCH，例如CPDCCH在子帧n发送。即使CPDCCH在整个子帧n中扩展发送，以及即使第n+2个子帧是特殊子帧，MF1.1的终端设备也来得及在特殊子帧的上行切换点之前处理完毕。
在另一种实施方式中，N不是固定值，例如基站如果在确定第n+N+1个子帧是UL Burst时通过CPDCCH向终端设备发送DCI，此时N就可以不是固定值。例如，基站某次确定第n+2+1个子帧是UL Burst，则通过CPDCCH向终端设备发送DCI，此时N＝2，而基站可能下次在确定第n+3+1个子帧是UL Burst就会通过CPDCCH向终端设备发送DCI，此时N又等于3。那么在这种情况下，显然终端设备通过Subframe configuration for WCE字段就只能确定第n+N个子帧包括的下行符号的数量，而无法根据Subframe configuration for WCE字段确定第n+N个子帧所在的位置，即不能确定N的取值。
为了解决该问题，本发明实施例进一步对DCI包括的其他字段加以利用。例如进一步利用DCI包括的Uplink transmission duration and offset indication字段，基站通过Uplink transmission duration and offset indication字段指示第n+N个子帧所在的位置，即，通过Uplink transmission duration and offset indication字段指示N的取值。具体的，基站可通过Uplink transmission duration and offset indication字段中的上行子帧偏移信息来指示第n+N个子帧所在的位置。
为了更好地理解，下面提供表3，用于介绍如何通过Uplink transmission duration and offset indication字段来指示第n+N个子帧所在的位置。需注意的是，表3包括的内容只是举例，在实际应用中不限于此种设置方式，只要是通过Uplink transmission duration and offset indication字段指示第n+N个子帧所在的位置的方式均在本发明实施例的保护范围之内。
表3
Figure PCTCN2017080965-appb-000005
例如，DCI中的Uplink transmission duration and offset indication字段的取值为00111，那么根据表3可知，UL offset即可理解为上行子帧偏移信息，具体的，UL offset的取值可理解为上述n+N+1中N+1的取值。表3中，如果UL offset的取值为2，即N+1＝2，表明N＝1，则该DCI指示的就是第n个子帧的下一个子帧包括的下行符号的数量，且UL duration的取值为1，表明UL Burst持续的时间是一个子帧。再例如，DCI中的Uplink transmission duration and offset indication字段的取值为01000，那么根据表3可知，UL offset的取值为2，即表明N＝1，则该DCI指示的就是第n个子帧的下一个子帧包括的下行符号的数量，且UL duration的取值 为2，表明UL Burst持续的时间是两个子帧。从表3可以看出，在本发明实施例中，基站在第n个子帧发送的CPDCCH，其DCI中Subframe configuration for WCE字段所确定的下行符号个数，对应的是Uplink transmission duration and offset indication字段的UL offset所指示的子帧的前一个子帧的下行符号个数，UL offset取值应该尽量大于或等于3，即，UL offset所指示的N的取值应该尽量大于或等于2。
可见，如果N的值不是固定的，那么，终端设备在接收基站通过CPDCCH发送的DCI后，通过DCI中的Subframe configuration for WCE字段可以确定第n+N个子帧包括的下行符号的数量，以及通过DCI中的Uplink transmission duration and offset indication字段确定第n+N个子帧所在的位置。那么基站可以可以提前2个子帧或更多子帧进行配置DCI所指示的下行符号的数量，不限定于提前2个子帧通知终端设备，对于基站来说更为灵活。
综上，在本发明实施例中，网络设备会在第n个子帧指示第n+N个子帧包括的下行符号的数量，N大于或等于2，可以尽量保证终端设备能够及时解调DCI，减小系统异常的概率。
在图4所示的实施例中，除了在控制域中配置MF1.0的CPDCCH资源之外，在数据域中也扩展了MF1.0的CPDCCH资源，可以保证MF1.0的终端设备继续在控制域中检测CPDCCH，同时，MF1.1的终端设备可以联合控制域中的CPDCCH资源和数据域中的扩展CPDCCH资源来共同解调DCI。因此，图4所示的实施例可以兼容MF1.0的终端设备，同时MF1.1的终端设备也可以利用MF1.0的CPDCCH资源，达到了时频资源利用率的最大化。
下面再介绍本发明的另一实施例，该实施例提供另一种指示子帧配置的方法，请参见图6。在该实施例中，基站为MF1.1的终端设备分配与MF1.0的终端设备相同或不同的CPDCCH DCI，主要介绍的是基站为MF1.1的终端设备分配与MF1.0的终端设备不同的DCI的情况，即，在数据域为MF1.1的终端设备单独分配CPDCCH资源来承载发送给MF1.1的终端设备的DCI。其中，这里的DCI不同，主要是指DCI的格式不同。那么，为MF1.1的终端设备分配的DCI与为MF1.0的终端设备分配的DCI不再兼容，则MF1.1的终端设备无法再利用MF1.0的终端设备的CPDCCH资源。下文为了表述方便，将在数据域中为MF1.1的终端设备单独分配的CPDCCH称为增强的公共物理下行控制信道(enhanced Common Physical Downlink Control Channel，ECPDCCH)或者增强的物理下行控制信道(enhancedPhysical Downlink Control Channel，EPDCCH)。
S61、基站确定第n+N个子帧包括的下行符号的数量。其中，N为大于或等于2的整数。
其中，第n+N个子帧可以是完整子帧，或者是不完整子帧，或者是特殊子帧，即，第n+N个子帧包括的下行符号的数量可以小于第一预设阈值，也可以等于第一预设阈值，本发明实施例不作限制。其中，第一预设阈值是协议规定的一个完整子帧包括的下行符号的数量，这里的完整子帧，可以是指完整的下行子帧，即，第一预设阈值也可以理解为协议规定的完整子帧包括的符号的总数量。例如，对于LTE/MF，正常循环前缀(Normal Cyclic Prefix，NCP)的子帧，一般来说第一预设阈值为14，扩展循环前缀(Extended Cyclic Prefix，ECP)的子帧，一般来说第一预设阈值为12，对于其它系统，还有可能规定为其他的取值。这里的12或14只是举例，是根据不同类型的子帧所确定的完整子帧包含的符号数，在子帧的类型不同时，第一预设阈值的取值可能就会有所不同，具体可根据协议或标准确定，本发明实施例不作限制。
S62、基站在第n个子帧的数据域通过EPDCCH发送CPDCCH DCI，则终端设备在第n 个子帧的数据域通过EPDCCH接收基站发送的CPDCCH DCI。下文中将该DCI称为第一DCI。其中，基站发送的DCI就可以用于指示第n+N个子帧包括的下行符号的数量。
在本发明实施例中，相当于为MF1.1的终端设备重新设计了DCI格式，该DCI无需考虑兼容MF1.0的终端设备，那么基站在发送DCI时可以考虑不同版本的终端设备，例如，在需要向MF1.0的终端设备发送DCI时，基站可通过控制域的CPDCCH向MF1.0的终端设备发送DCI，下文中将通过控制域发送的CPDCCH DCI称为第二DCI，在需要向MF1.1的终端设备发送DCI时，基站可通过数据域的CPDCCH向MF1.1的终端设备发送第一DCI，第一DCI和第二DCI可以在一个子帧中发送，例如都在第n个子帧里发送，或者也可以在不同的子帧中发送，本发明实施例对于第一DCI和第二DCI的发送时间以及发送顺序不作限制。
对于MF1.1的终端设备来说，可以通过接收数据域里的CPDCCH承载的第一DCI来确定第n+N个子帧包括的下行符号的数量。对于MF1.0的终端设备来说，可以接收控制域里的CPDCCH承载的第二DCI，如果基站也是通过第二DCI来指示第n+N个子帧包括的下行符号的数量，那么MF1.0的终端设备就可以根据第二DCI来确定第n+N个子帧包括的下行符号的数量，如果基站通过第二DCI指示的是当前子帧或下一个子帧包括的下行符号的数量，那么MF1.0的终端设备就可以根据第二DCI来确定当前子帧或下一个子帧包括的下行符号的数量，即，本发明实施例对于第二DCI究竟指示的是哪个子帧包括的下行符号的数量不作限制。
在本发明实施例中，第一DCI的格式不同于第二DCI的格式，其中第二DCI的格式可以是前文中介绍本发明实施例中的用语的第7)条所介绍的DCI的格式，或者也可以是图4所示的实施例中介绍的DCI的格式，在此不做限制。
下面介绍第一DCI的格式，即介绍第一DCI包括的字段。在一种实施方式中，第一DCI可以包括如下字段：
Subframe configuration for LAA or MF字段；
Uplink transmission duration and offset indication字段；
PUSCH trigger B字段；
MF-ePUCCH trigger indication(only for MF cells)字段。
其中，Uplink transmission duration and offset indication字段、PUSCH trigger B字段、及MF-ePUCCH trigger indication(only for MF cells)字段所占用的比特数可参考前文中介绍的DCI，不多赘述。在本发明实施例中，可以利用Subframe configuration for LAA or MF字段来指示第n+N个子帧包括的下行符号的数量，参考图4所示的实施例中介绍的通过Subframe configuration for WCE字段来指示第n+N个子帧包括的下行符号的数量的方式可知，在第一DCI中，Subframe configuration for LAA or MF字段也可以只占用3bit，或者也可以小于3bit，具体占用的比特数与指示方式有关。也就是说，第一DCI中用于指示第n+N个子帧包括的下行符号的数量的比特数小于第二预设阈值，第二预设阈值可以是与MF1.0的终端设备兼容的DCI中的Subframe configuration for LAA or MF字段占用的比特数，例如为4。
另外可以看到，第一DCI中不包括Reserved字段了。原因在于，在图4所示的实施例介绍的DCI以及在前文中介绍本发明实施例中的用语的第7)条介绍的DCI中，之所以保留了Reserved字段，是为了兼容考虑的，即，是为了兼容MF1.0的终端设备。而本发明实施例已经不再考虑兼容的情况，那么第一DCI中也就无需再保留Reserved字段。因此，第一DCI中的Subframe configuration for LAA or MF字段可以只占用3bits，或者占用比3bits更少的bits， 且无需保留Reserved字段，那么第一DCI的长度相对于前文中介绍的其他DCI的长度来说也就得到了较大程度的减少。例如，在Subframe configuration for LAA or MF字段占用3bits的情况下，第一DCI的长度只有10bit，相对于前文中介绍的其他DCI的15bits的长度来说，净荷的长度下降了30％，减少了资源的浪费，降低码率，可以进一步达到覆盖增强目的。
S63、终端设备根据第一DCI确定第n+N个子帧包括的下行符号的数量。
前面介绍了第一DCI包括的字段，也介绍了第一DCI如何指示第n+N个子帧包括的下行符号的数量，那么终端设备接收第一DCI之后就能根据第一DCI确定第n+N个子帧包括的下行符号的数量。
下面结合附图介绍本发明实施例提供的装置。
图7示出了一种通信装置700的结构示意图。该通信装置700可以实现上文中涉及的网络设备的功能。该通信装置700可以包括处理单元701和发送单元702。其中，处理单元701可以用于执行图4所示的实施例中的S41，和/或用于支持本文所描述的技术的其它过程。发送单元702可以用于执行图4所示的实施例中的S42，和/或用于支持本文所描述的技术的其它过程。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
图8示出了一种通信装置800的结构示意图。该通信装置800可以实现上文中涉及的网络设备的功能。该通信装置800可以包括处理单元801和接收单元802。其中，处理单元801可以用于执行图4所示的实施例中的S43，和/或用于支持本文所描述的技术的其它过程。接收单元802可以用于执行图4所示的实施例中的S42，和/或用于支持本文所描述的技术的其它过程。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
图9示出了一种通信装置900的结构示意图。该通信装置900可以实现上文中涉及的网络设备的功能。该通信装置900可以包括处理单元901和发送单元902。其中，处理单元901可以用于执行图6所示的实施例中的S61，和/或用于支持本文所描述的技术的其它过程。发送单元902可以用于执行图6所示的实施例中的S62，和/或用于支持本文所描述的技术的其它过程。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
图10示出了一种通信装置1000的结构示意图。该通信装置1000可以实现上文中涉及的网络设备的功能。该通信装置1000可以包括处理单元1001和接收单元1002。其中，处理单元1001可以用于执行图6所示的实施例中的S63，和/或用于支持本文所描述的技术的其它过程。接收单元1002可以用于执行图6所示的实施例中的S62，和/或用于支持本文所描述的技术的其它过程。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本发明实施例中，通信装置700～通信装置1000对应各个功能划分各个功能模块的形式来呈现，或者，可以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定应用集成电路(application-specific integrated circuit，ASIC)，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
在一个简单的实施例中，本领域的技术人员可以想到，还可以将通信装置700～通信装置1000中的任意一个通信装置通过如图11所示的结构实现。
如图11所示，通信装置1100可以包括：存储器1101、处理器1102、系统总线1103 以及通信接口1104。其中，处理器1102、存储器1101以及通信接口1104通过系统总线1103连接。存储器1101用于存储计算机执行指令，当通信装置1100运行时，处理器1102执行存储器1101存储的计算机执行指令，以使通信装置1100执行图4所示的实施例或图6所示的实施例提供的指示子帧配置的方法。具体的指示子帧配置的方法方法可参考上文及附图中的相关描述，此处不再赘述。其中，通信接口1104可以是收发器，或者是独立的接收器和发送器。
在一个示例中，发送单元702可以对应图11中的通信接口1104。处理单元701可以以硬件形式/软件形式内嵌于或独立于通信装置1100的存储器1101中。
在一个示例中，接收单元802可以对应图11中的通信接口1104。处理单元801可以以硬件形式/软件形式内嵌于或独立于通信装置1100的存储器1101中。
在一个示例中，发送单元902可以对应图11中的通信接口1104。处理单元901可以以硬件形式/软件形式内嵌于或独立于通信装置1100的存储器1101中。
在一个示例中，接收单元1002可以对应图11中的通信接口1104。处理单元1001可以以硬件形式/软件形式内嵌于或独立于通信装置1100的存储器1101中。
可选的，通信装置1100可以是现场可编程门阵列(field-programmable gate array，FPGA)，专用集成芯片(application specific integrated circuit，ASIC)，系统芯片(system on chip，SoC)，中央处理器(central processor unit，CPU)，网络处理器(network processor，NP)，数字信号处理电路(digital signal processor，DSP)，微控制器(micro controller unit，MCU)，还可以采用可编程控制器(programmable logic device，PLD)或其他集成芯片。或者，通信装置1100也可以是单独的网元，例如为网络设备或者终端设备。
由于本发明实施例提供的通信装置700～通信装置1100可用于执行上述的通信的方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
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程序指令时，全部或部分地产生按照本发明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(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，DVD)、或者半导体介质(例如，固态硬盘(Solid State Disk，SSD))等。

Claims (44)

  1. 一种指示子帧配置的方法，其特征在于，包括：
    网络设备确定第n+N个子帧包括的下行符号的数量，所述n为大于或等于0的整数，所述N为大于或等于2的整数；
    所述网络设备在第n个子帧的控制域和数据域均通过下行控制信道发送下行控制信息DCI；所述DCI用于指示所述第n+N个子帧包括的下行符号的数量。
  2. 如权利要求1所述的方法，其特征在于，所述DCI通过所述DCI中的预留位指示所述第n+N个子帧包括的下行符号的数量。
  3. 如权利要求1或2所述的方法，其特征在于，所述第n+N个子帧包括的下行符号的数量小于第一预设阈值；所述第一预设阈值为一个完整子帧包括的下行符号的数量。
  4. 如权利要求3所述的方法，其特征在于，所述一个完整子帧为扩展循环前缀的子帧，则所述第一预设阈值为12，或者所述一个完整子帧为正常循环前缀的子帧，则所述第一预设阈值为14。
  5. 如权利要求1～4任一所述的方法，其特征在于，所述方法还包括：
    所述网络设备确定第n+N+1个子帧为上行子帧。
  6. 一种指示子帧配置的方法，其特征在于，包括：
    终端设备在第n个子帧的控制域和数据域均通过下行控制信道接收下行控制信息DCI，所述n为大于或等于0的整数；
    所述终端设备根据所述DCI确定第n+N个子帧包括的下行符号的数量；所述N为大于或等于2的整数。
  7. 如权利要求6所述的方法，其特征在于，所述终端设备根据所述DCI确定第n+N个子帧包括的下行符号的数量，包括：
    所述终端设备根据所述DCI中的预留位的指示确定所述第n+N个子帧包括的下行符号的数量。
  8. 如权利要求6或7所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述DCI携带的上行子帧偏移信息确定所述第n+N个子帧所在的位置；所述上行子帧偏移信息用于指示N的取值。
  9. 如权利要求6～8任一所述的方法，其特征在于，所述第n+N个子帧包括的下行符号的数量小于第一预设阈值；所述第一预设阈值为一个完整子帧包括的下行符号的数量。
  10. 如权利要求9所述的方法，其特征在于，所述一个完整子帧为扩展循环前缀的子帧，则所述第一预设阈值为12，或者所述一个完整子帧为正常循环前缀的子帧，则所述第一预设阈值为14。
  11. 如权利要求6～10任一所述的方法，其特征在于，所述方法还包括：
    所述终端设备确定第n+N+1个子帧为上行子帧。
  12. 一种指示子帧配置的方法，其特征在于，包括：
    网络设备确定第n+N个子帧包括的下行符号的数量，所述n为大于或等于0的整数，所述N为大于或等于2的整数；
    网络设备在第n个子帧的数据域通过下行控制信道发送第一DCI；其中，所述第一DCI用于指示所述第n+N个子帧包括的下行符号的数量。
  13. 如权利要求12所述的方法，其特征在于，所述第一DCI中用于指示所述第n+N个子帧包括的下行符号的数量的比特数小于第二预设阈值。
  14. 如权利要求12或13所述的方法，其特征在于，所述方法还包括：
    所述网络设备在所述第n个子帧的控制域通过下行控制信道发送第二DCI；其中，所述第一DCI与所述第二DCI的格式不同。
  15. 如权利要求14所述的方法，其特征在于，所述第一DCI的长度小于所述第二DCI的长度。
  16. 一种指示子帧配置的方法，其特征在于，包括：
    终端设备在第n个子帧的数据域通过下行控制信道接收网络设备发送的第一下行控制信息DCI，所述n为大于或等于0的整数；
    所述终端设备根据所述第一DCI确定第n+N个子帧包括的下行符号的数量，所述N为大于或等于2的整数。
  17. 如权利要求16所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述第一DCI携带的上行子帧偏移信息确定所述第n+N个子帧所在的位置；所述上行子帧偏移信息用于指示N的取值。
  18. 如权利要求16或17所述的方法，其特征在于，所述第一DCI中用于指示所述第n+N个子帧包括的下行符号的数量的比特数小于第二预设阈值。
  19. 如权利要求16～18任一所述的方法，其特征在于，所述方法还包括：
    所述终端设备在所述第n个子帧的控制域通过下行控制信道接收所述网络设备发送的第二DCI；其中，所述第一DCI与所述第二DCI的格式不同。
  20. 如权利要求19所述的方法，其特征在于，所述第一DCI的长度小于所述第二DCI的长度。
  21. 一种通信装置，其特征在于，包括：
    处理单元，用于确定第n+N个子帧包括的下行符号的数量，所述n为大于或等于0的整数，所述N为大于或等于2的整数；
    发送单元，用于在第n个子帧的控制域和数据域均通过下行控制信道发送下行控制信息DCI；所述DCI用于指示所述第n+N个子帧包括的下行符号的数量。
  22. 如权利要求21所述的装置，其特征在于，所述DCI通过所述DCI中的预留位指示所述第n+N个子帧包括的下行符号的数量。
  23. 如权利要求21或22所述的装置，其特征在于，所述第n+N个子帧包括的下行符号的数量小于第一预设阈值；所述第一预设阈值为一个完整子帧包括的下行符号的数量。
  24. 如权利要求23所述的装置，其特征在于，所述一个完整子帧为扩展循环前缀子帧，则所述第一预设阈值为12，或者所述一个完整子帧为正常循环前缀子帧，则所述第一预设阈值为14。
  25. 如权利要求21～24任一所述的装置，其特征在于，所述处理单元还用于：
    确定第n+N+1个子帧为上行子帧。
  26. 一种通信装置，其特征在于，包括：
    接收单元，用于在第n个子帧的控制域和数据域均通过下行控制信道接收下行控制信息DCI；所述n为大于或等于0的整数；
    处理单元，用于根据所述DCI确定第n+N个子帧包括的下行符号的数量，所述N为 大于或等于2的整数。
  27. 如权利要求26所述的装置，其特征在于，所述处理单元用于根据所述DCI确定第n+N个子帧包括的下行符号的数量，包括：
    根据所述DCI中的预留位的指示确定所述第n+N个子帧包括的下行符号的数量。
  28. 如权利要求26或27所述的装置，其特征在于，所述处理单元还用于：
    根据所述DCI携带的上行子帧偏移信息确定所述第n+N个子帧所在的位置；所述上行子帧偏移信息用于指示N的取值。
  29. 如权利要求26～28任一所述的装置，其特征在于，所述第n+N个子帧包括的下行符号的数量小于第一预设阈值；所述第一预设阈值为一个完整子帧包括的下行符号的数量。
  30. 如权利要求29所述的装置，其特征在于，所述一个完整子帧为扩展循环前缀子帧，则所述第一预设阈值为12，或者所述一个完整子帧为正常循环前缀子帧，则所述第一预设阈值为14。
  31. 如权利要求26～30任一所述的装置，其特征在于，所述处理单元还用于：
    确定第n+N+1个子帧为上行子帧。
  32. 一种通信装置，其特征在于，包括：
    处理单元，用于确定第n+N个子帧包括的下行符号的数量；所述n为大于或等于0的整数，所述N为大于或等于2的整数；
    发送单元，用于在第n个子帧的数据域通过下行控制信道发送第一DCI；其中，所述第一DCI用于指示所述第n+N个子帧包括的下行符号的数量。
  33. 如权利要求32所述的装置，其特征在于，所述第一DCI中用于指示所述第n+N个子帧包括的下行符号的数量的比特数小于第二预设阈值。
  34. 如权利要求32或33所述的装置，其特征在于，所述发送单元还用于：
    在所述第n个子帧的控制域通过下行控制信道发送第二DCI；其中，所述第一DCI与所述第二DCI的格式不同。
  35. 如权利要求34所述的装置，其特征在于，所述第一DCI的长度小于所述第二DCI的长度。
  36. 一种通信装置，其特征在于，包括：
    接收单元，用于在第n个子帧的数据域通过下行控制信道接收网络设备发送的第一下行控制信息DCI，所述n为大于或等于0的整数；
    处理单元，用于根据所述第一DCI确定第n+N个子帧包括的下行符号的数量，所述N为大于或等于2的整数。
  37. 如权利要求36所述的装置，其特征在于，所述处理单元还用于：
    根据所述第一DCI携带的上行子帧偏移信息确定所述第n+N个子帧所在的位置；所述上行子帧偏移信息用于指示N的取值。
  38. 如权利要求36或37所述的装置，其特征在于，所述第一DCI中用于指示所述第n+N个子帧包括的下行符号的数量的比特数小于第二预设阈值。
  39. 如权利要求36～38任一所述的装置，其特征在于，所述接收单元还用于：
    在所述第n个子帧的控制域通过下行控制信道接收所述网络设备发送的第二DCI；其中，所述第一DCI与所述第二DCI的格式不同。
  40. 如权利要求39所述的装置，其特征在于，所述第一DCI的长度小于所述第二DCI 的长度。
  41. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质包括指令，当所述指令在计算机上运行时，使得所述计算机执行如权利要求1～5所述的方法。
  42. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质包括指令，当所述指令在计算机上运行时，使得所述计算机执行如权利要求6～11所述的方法。
  43. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质包括指令，当所述指令在计算机上运行时，使得所述计算机执行如权利要求12～15所述的方法。
  44. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质包括指令，当所述指令在计算机上运行时，使得所述计算机执行如权利要求16～20所述的方法。
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