WO2018166421A1 - 传输控制信息的方法、设备和系统 - Google Patents

传输控制信息的方法、设备和系统 Download PDF

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Publication number
WO2018166421A1
WO2018166421A1 PCT/CN2018/078728 CN2018078728W WO2018166421A1 WO 2018166421 A1 WO2018166421 A1 WO 2018166421A1 CN 2018078728 W CN2018078728 W CN 2018078728W WO 2018166421 A1 WO2018166421 A1 WO 2018166421A1
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Prior art keywords
resources
downlink control
terminal
candidate location
candidate
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PCT/CN2018/078728
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English (en)
French (fr)
Inventor
李华
秦熠
王轶
栗忠峰
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华为技术有限公司
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Publication of WO2018166421A1 publication Critical patent/WO2018166421A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/046Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027Scheduling of signalling, e.g. occurrence thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • H04W72/1263Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows

Definitions

  • the present application relates to wireless communication technologies, and in particular, to a communication method, device and system for controlling information transmission.
  • BF beamforming
  • the base station may send N pieces of downlink control information with the same content to the terminal through N beams, that is, the same downlink control information is repeatedly sent N times to ensure that the terminal can correctly receive the downlink control information.
  • Downstream control information is an integer ⁇ 2. Based on this, it is necessary to solve how to effectively utilize multiple downlink control information with the same content to improve the transmission performance of the control channel, and reduce the complexity of receiving and extracting useful information on the terminal side.
  • the present application describes a method, apparatus and system for transmitting control information in a communication system.
  • an embodiment of the present application provides a method for transmitting a control signal in a communication system, where the method includes: receiving, by a terminal, downlink control information sent by a base station, where the downlink control information includes downlink control information that belongs to the terminal, where The downlink control information of the terminal is carried in N resources, where the N resources are located in a downlink control channel of a scheduling time unit, and N is an integer of ⁇ 2; the terminal monitors the downlink control channel, and acquires Determining downlink control information of the terminal; wherein the N resources have a certain relationship in the downlink control channel.
  • the N resources may correspond to the N antenna port sets of the base station, and the antenna port set may include at least one antenna port.
  • the N resources may correspond to N beams transmitted by the base station.
  • At least two antenna port sets in the set of N antenna ports are non-quasi-co-located, that is, any one of any one of the antenna port sets in the at least two antenna port sets.
  • the port is non-co-located with any of the other antenna port sets of the at least two antenna port sets.
  • the transmission direction of the N antenna ports or the N beams may be different. Therefore, the technical solution of the present application can better combat the severe transmission channel degradation in a certain direction.
  • the terminal receives the first information sent by the base station, and the first information is used to indicate the determined relationship.
  • the determined relationship in a possible design is pre-agreed by the base station and the terminal. For example, pre-agreed by agreement.
  • the N resources are respectively corresponding to N candidate location sets, and the N resources have a certain relationship in the downlink control channel, including: in the N candidate location sets,
  • the N aggregation levels and the N candidate location numbers respectively corresponding to the N resources are the same.
  • the N resources are respectively corresponding to N candidate location sets, and the N resources have a certain relationship in the downlink control channel, including: in the N candidate location sets, At least two aggregation levels of the N aggregation levels respectively corresponding to the N resources are different; or, in the N candidate location sets, there are at least two N candidate location numbers corresponding to the N resources respectively The candidate location numbers are not the same; or, in the N candidate location sets, the N aggregation levels corresponding to the N resources respectively have at least two aggregation levels different, and the N resources respectively correspond to N
  • the candidate location number has at least two candidate location numbers that are not the same.
  • the candidate positions of the two resources are different, it can be ensured that the second candidate position has a certain frequency domain deviation from the first one, thereby obtaining the frequency domain diversity gain. If the aggregation levels are different, DCI on different resources can have different reliability and more flexible support for spatial diversity implementation.
  • the N resources are all located in the same search space, and the N resources have different position offsets respectively.
  • the terminal may receive a message that is sent by the base station and includes location offset information. Having N resources in the same search space can further reduce the complexity of blind detection to a certain extent.
  • the location offset may be bound to the cell identifier, and the corresponding location offsets are different for different cell identifiers, so that when one of the N resources is interfered, other resources are The position offset is different and will not be disturbed.
  • the interference randomization of the PDCCH of different cells is further implemented.
  • the N resources are located in the same time domain position of one scheduling time unit, and the terminal performs blind detection on the downlink control channel by using a subset of the aggregation level set.
  • the terminal receives a message that is sent by the base station and includes information about a subset of the aggregation level. In this way, the terminal can be controlled to not exceed the upper limit of its maximum blind detection capability.
  • the N shares of resources are located in N different sub-scheduling time units of a scheduled time unit.
  • an embodiment of the present application provides a method for transmitting a control signal in a communication system, where the method includes: acquiring, by a base station, a relationship determined by N resources in a downlink control channel, where the N resources are located in a scheduling time unit; The base station sends downlink control information to the terminal according to the determined relationship, where the downlink control information includes downlink control information that belongs to the terminal, and downlink control information of the terminal is carried in the N resources.
  • N is an integer ⁇ 2.
  • the N resources may correspond to the N antenna port sets of the base station, and the antenna port set may include at least one antenna port.
  • the N resources may correspond to N beams transmitted by the base station.
  • At least two antenna port sets in the set of N antenna ports are non-quasi-co-located, that is, any one of any one of the antenna port sets in the at least two antenna port sets.
  • the port is non-co-located with any of the other antenna port sets of the at least two antenna port sets.
  • the transmission direction of the N antenna ports or the N beams may be different. Therefore, the technical solution of the present application can better combat the severe transmission channel degradation in a certain direction.
  • the base station sends first information to the terminal, and the first information is used to indicate the determined relationship.
  • the determined relationship in a possible design is pre-agreed by the base station and the terminal. For example, pre-agreed by agreement.
  • the N resources are respectively corresponding to N candidate location sets, and the N resources have a certain relationship in the downlink control channel, including: in the N candidate location sets,
  • the N aggregation levels and the N candidate location numbers respectively corresponding to the N resources are the same.
  • the N resources are respectively corresponding to N candidate location sets, and the N resources have a certain relationship in the downlink control channel, including: in the N candidate location sets, At least two aggregation levels of the N aggregation levels respectively corresponding to the N resources are different; or, in the N candidate location sets, there are at least two N candidate location numbers corresponding to the N resources respectively The candidate location numbers are not the same; or, in the N candidate location sets, the N aggregation levels corresponding to the N resources respectively have at least two aggregation levels different, and the N resources respectively correspond to N
  • the candidate location number has at least two candidate location numbers that are not the same.
  • the candidate positions of the two resources are different, it can be ensured that the second candidate position has a certain frequency domain deviation from the first one, thereby obtaining the frequency domain diversity gain. If the aggregation levels are different, DCI on different resources can have different reliability and more flexible support for spatial diversity implementation.
  • any one of the ⁇ m1, ⁇ m2, ⁇ L1, and ⁇ L2 may be notified by the base station to the terminal.
  • the N resources are all located in the same search space, and the N resources have different position offsets respectively.
  • the base station may send, to the terminal, a message that sends location offset information. Having N resources in the same search space can further reduce the complexity of blind detection to a certain extent.
  • the location offset may be bound to the cell identifier, and the corresponding location offsets are different for different cell identifiers, so that when one of the N resources is interfered, other resources are The position offset is different and will not be disturbed.
  • the interference randomization of the PDCCH of different cells is further implemented.
  • the N resources are located in the same time domain location of a scheduling time unit, and the base station sends third information to the terminal, where the third information is used to indicate the aggregation level of the child.
  • the subset of the aggregation level is used when the terminal performs blind detection on the downlink control channel. In this way, the terminal can be controlled to not exceed the upper limit of its maximum blind detection capability.
  • the N shares of resources are located in N different sub-scheduling time units of a scheduled time unit.
  • an embodiment of the present invention provides a communication device, which may be a terminal, and has a function of implementing terminal behavior in the design of the foregoing method.
  • the function can be implemented by hardware, and the structure of the terminal includes a transceiver and a processor.
  • the corresponding software implementation can also be performed by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the modules can be software and/or hardware.
  • the embodiment of the present invention provides another communication device, which may be a base station, and has the function of realizing the behavior of the base station in the actual method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present invention provides a communication system, including the base station and the terminal in the foregoing aspect.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use in the terminal, including a program designed to perform the above aspects.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use by the base station, including a program designed to perform the above aspects.
  • the technical solution of the present application reduces the complexity of terminal blind detection and gain combining by establishing the relationship between the positions of multiple DCIs in the PDCCH belonging to the same terminal, and improves the transmission performance of the control channel in the communication system.
  • the multiple DCIs with the same content may be sent through different beams respectively.
  • Figure 1 shows an infrastructure of a communication system
  • FIG. 2 is a schematic structural view of a terminal
  • FIG. 3 is a schematic structural diagram of a base station
  • FIG. 5 is a schematic structural diagram of a communication device.
  • a physical downlink control channel is a primary bearer channel for transmitting downlink physical layer control signaling, and physical layer control information of the bearer includes uplink/downlink data transmission. Scheduling information and uplink power control command information.
  • the transmission of the PDCCH is organized in the form of a control channel element (CCE), and one CCE is composed of nine resource element groups (REGs).
  • CCE control channel element
  • REGs resource element groups
  • One PDCCH is transmitted on consecutive CCEs. According to the number of occupied CCEs, four PDCCH sizes are defined, occupying 1, 2, 4, and 8 CCEs respectively, and corresponding to aggregation levels 1, 2, 4, and 8.
  • the PDCCH is transmitted by the base station to the terminal.
  • the terminal adopts a blind detection mode for receiving the PDCCH, that is, the terminal can monitor the PDCCH, and demodulate all PDCCHs that may belong to the PDCCH according to the size of the downlink control information (DCI) that may be used, and search for the PDCCH.
  • DCI downlink control information
  • the terminal may attempt to decode the PDCCH in the PDCCH candidate location (PDCCH candidate) set according to the format of the DCI to be monitored, and the set may be referred to as the search space of the terminal.
  • the search space can be divided into a common search space and a user equipment (UE) specific search space.
  • UE user equipment
  • the common search space is used for transmitting cell-level common control information related to paging paging, broadcast control channel (BCCH), etc.
  • the user equipment-specific search space is used for transmitting UEs related to downlink data, uplink data, and the like. Level of control information.
  • Table 9.1.1-1 (UE candidate detected by UE) in the 3rd generation partnership project (3GPP) technical specification (TS) 36.213 version 14.1.0 (v14.1.0) As shown in Table 1 below:
  • the number of CCEs occupied by the PDCCH is 12, and the number of candidates for the PDCCH that the terminal needs to listen to is 6.
  • the CCE occupied by a certain PDCCH candidate m (that is, the PDCCH candidate number is m) can be calculated by the following formula (1):
  • N CCE,k is the total number of CCEs available for PDCCH in subframe k.
  • the value of the nRNTI is different according to the PDCCH. It can be system information (SI) - radio network temporary identity (RNTI), paging RNTI (paging). - RNTI, P-RNTI) or random access RNTI (RA-RNTI).
  • SI system information
  • RNTI radio network temporary identity
  • paging RNTI paging
  • RA-RNTI random access RNTI
  • high-band communication can be performed based on a beam by using a BF method.
  • the same antenna panel can form an analog beam in one direction at the same time.
  • the terminal can monitor the PDCCH on multiple beams. This kind of monitoring can be simultaneous or not at the same time.
  • the base station can send the same DCI to the terminal through N beams, that is, the same DCI is repeatedly transmitted N times (N is a positive integer ⁇ 2) to ensure that the terminal can correctly receive the DCI.
  • N is a positive integer ⁇ 2
  • the PDCCH is received by using blind detection.
  • the terminal blindly detects the DCI belonging to itself in the PDCCH on the first beam, and if no sufficient information is detected, continues to blindly detect the DCI belonging to itself in the PDCCH on the other beam, and so on. In this way, the terminal can correctly obtain the DCI belonging to itself by combining these pieces of information to obtain a combining gain.
  • the terminal may blindly detect the DCI in the PDCCH on the second or more beams, and for each candidate location, do a message with all candidate locations of the DCI in the first beam. merge. In this way, the total number of blind detections of the terminal is the value obtained by multiplying the number of times of blind detection. Obviously, the complexity is too high and the overhead is too large for the terminal.
  • the present invention reduces the complexity of terminal blind detection and gain combining by establishing the relationship between multiple locations of the same DCI in the PDCCH belonging to the same terminal, and improves the transmission performance of the control channel in the communication system.
  • the multiple DCIs with the same content may be sent through different beams respectively.
  • the technology described in this application can be applied to an LTE system, or other wireless communication systems using various radio access technologies, for example, using code division multiple access (CDMA).
  • CDMA code division multiple access
  • FDMA Frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • the base station may send the various physical layer control information, including the scheduling information of the uplink/downlink data transmission and the uplink power control command, to the PDCCH and send the PDCCH to the terminal.
  • the PDCCH and the DCI in the current PDCCH may have different names in different communication systems, and the present application does not limit this.
  • the following uses the PDCCH to refer to a channel having the similar function, which is referred to by DCI. Control information with similar functions.
  • the terminal involved in the present application may be a device that provides voice and/or data connectivity to a user, including a wired terminal and a wireless terminal.
  • the wireless terminal can be a handheld device with wireless connectivity, or other processing device connected to a wireless modem, and a mobile terminal that communicates with one or more core networks via a wireless access network.
  • the wireless terminal can be a mobile phone, a computer, a tablet, a personal digital assistant (PDA), a mobile internet device (MID), a wearable device, and an e-book reader. Wait.
  • the wireless terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the wireless terminal can be a mobile station or an access point.
  • the aforementioned UE is a type of terminal and is a title in the LTE system.
  • the above-mentioned devices are collectively referred to as terminals.
  • the base station involved in the present application is a device deployed in a radio access network (RAN) to provide a wireless communication function for a terminal.
  • the base station may include various forms of macro base stations, micro base stations, relay stations, access point base station controllers, transmission and reception nodes (TRPs), and the like.
  • TRPs transmission and reception nodes
  • the specific name of the base station may be different.
  • an evolved NodeB (eNB) is used in an evolved system of the LTE system.
  • the terminal as described above may be used by the terminal 200 as shown in FIG. 2 for performing the method steps related to the terminal in the various embodiments involved in the present application.
  • the terminal 200 includes a processing unit 210 and a transceiver unit 220.
  • the base station as described above may be the base station 300 as shown in FIG. 3 for performing the method steps associated with the base station in the various embodiments involved in the present application.
  • the base station 300 includes a processing unit 310 and a transceiver unit 320.
  • the operations performed by the processing unit 210 or the transceiver unit 220 can be regarded as the operation of the terminal 200, and the operations performed by the processing unit 310 or the transceiver unit 320 can be regarded as the operation of the base station 300.
  • the processing unit 310 in the base station 300 can be implemented by a processor of the base station 300, and the transceiver unit 320 can be implemented by a transceiver in the base station 300; the processing unit 210 in the terminal 200 can be processed by a processor in the terminal 200.
  • the transceiver unit 220 can be implemented by a transceiver in the terminal 200.
  • one beam or one antenna port may be included in one beam for transmitting a data channel, a control channel, a sounding signal, and the like.
  • the transmit beam may refer to a distribution of signal strengths formed in different directions of the space after the signal is transmitted through the antenna
  • the receive beam may refer to a signal intensity distribution of the wireless signals received from the antenna in different directions in space.
  • one or more antenna ports forming one beam can also be considered as one antenna port set.
  • the present application relates to the term "scheduling time unit".
  • the scheduling and transmission of data in a communication system is generally based on the scheduling time unit, and the scheduling time unit may also be referred to as a minimum scheduling unit.
  • a communication system for example, a new radio (NR) system
  • NR new radio
  • the LTE system is subsequently evolved may also be a slot, a time domain symbol, or A mini slot consisting of one or more time domain symbols, consisting of multiple slots, or mini-slot aggregation.
  • the time domain symbol may be an orthogonal frequency division multiplexing (OFDM) symbol or an SC-FDMA symbol.
  • OFDM orthogonal frequency division multiplexing
  • listening PDCCH in the present application may also be understood as listening to a set of candidate locations where the PDCCH is located, wherein the interception may be understood as: attempting to decode each of the candidate location sets according to all monitored DCI formats. PDCCH.
  • multiple copies of DCI with the same content does not necessarily mean that multiple DCIs are completely identical in actual transmission, for example, they may have different redundancy versions with each other, but By means of gain combining or the like, they can recover that the content indicates a consistent DCI, so that the terminal can perform a certain action.
  • This embodiment provides a flowchart of a method for transmitting control information.
  • the base station acquires a relationship determined by the N resources in the downlink control channel, where the N resources are located in one scheduling time unit.
  • the base station sends downlink control information to the terminal according to the determined relationship, where the downlink control information includes downlink control information that belongs to the terminal, and downlink control information of the terminal is carried in the N
  • N is an integer ⁇ 2.
  • the base station may select to transmit the DCI with the same content in the PDCCH N times, where N is an integer of ⁇ 2. To ensure that the terminal can receive it correctly.
  • the DCI transmission is implemented in the same scheduling time unit, that is, the N resources carrying the N pieces of the same DCI are located in the same scheduling time unit.
  • a DCI corresponds to a scheduled time unit.
  • the N resources may correspond to the N antenna port sets of the base station, where the antenna port set may include at least one antenna port.
  • the N resources may correspond to N beams transmitted by the base station.
  • the transmission scheme of the N antenna ports or the N beams may be different. Therefore, the technical solution of the present application can better combat the severe transmission channel degradation phenomenon in a certain direction. That is, even if the signal transmission of one or more antenna port sets (or N beams) of the N antenna port sets (or the N beams) is weak due to the transmission channel, the terminal cannot pass the antenna port set (or N).
  • the beam correctly demodulates the DCI, and the remaining signal transmissions of the antenna port set (or beam) with better quality of the transmission channel can still ensure that the DCI is finally correctly demodulated by the terminal.
  • the N resources correspond to the N antenna port sets of the base station
  • at least two antenna port sets in the N antenna port sets are quasi co-located (QCL) of.
  • the non-QCL refers to a spatial parameter non-QCL.
  • Non-QCL between sets of antenna ports means that all antenna ports between one of the antenna port sets and the other antenna port set are non-QCL. If there are multiple antenna ports in the same antenna port set, they can be QCL between them.
  • the so-called antenna port QCL means that the parameters of the channel transmitting one symbol on one antenna port can be inferred by the channel transmitting one symbol on the other antenna port.
  • the parameter may be delay spread, Doppler spread, Doppler shift, average delay, average gain, angle of arrival (AOA), average AOA, AOA extension, and exit angle (Angle of Departure) , AOD), average AOD, AOD extension, receiving antenna spatial correlation parameters, at least one of a transmit beam, a receive beam, and a resource identifier.
  • the spatial parameters may include: AOA, average AOA, AOA extension, AOD, average AOD, AOD extension, receive antenna spatial correlation parameters, transmit beam, receive beam, resource identifier, and the like.
  • the beam includes at least one of the following, a precoding, a weight sequence number, and a beam sequence number.
  • the angle may be a decomposition value of a different dimension, or a combination of different dimensional decomposition values.
  • the antenna ports are antenna ports having different antenna port numbers, and/or antenna ports having the same antenna port number for transmitting or receiving information within different time and/or frequency and/or code domain resources, and/or having Antenna ports for transmitting or receiving information at different time and/or frequency and/or code domain resources for different antenna port numbers.
  • the resource identifier includes a channel state information reference signal (CSI-RS) resource identifier, or an SRS resource identifier, which is used to indicate a beam on the resource. Or, the transmission directions of at least two of the N beams are different.
  • CSI-RS channel state information reference signal
  • the technical solution establishes the relationship determined by the N resources in the PDCCH, that is, the location of one of the resources in the PDCCH (or The related information of the occupied CCE, the terminal can directly obtain the related information of the location (or the occupied CCE) of the remaining N-1 resources in the PDCCH by using the determined relationship, thereby effectively reducing blind detection of the terminal.
  • the number of times may be an aggregation level and a candidate location number of a search space corresponding to the PDCCH.
  • the determined relationship will be described in detail in the subsequent embodiments.
  • the base station acquires the relationship determined by the N resources in the PDCCH, where the base station may include at least the following two implementation manners: 1.
  • the base station obtains the N shares by using a pre-arrangement with the terminal, for example, by a protocol.
  • the base station configures, in the real-time, the relationship determined by the N resources in the PDCCH according to the actual situation of the communication.
  • the terminal may also know the determined relationship in two ways: 1.
  • the terminal obtains the N resources by using a pre-arrangement with the base station, for example, by a protocol.
  • the relationship determined in the downlink control channel.
  • the terminal receives the first information that is sent by the base station in real time, and the first information is used to indicate the determined relationship.
  • the base station may convert the DCIs belonging to the terminal into N shares, respectively carried on the N resources, and all in one scheduling time unit. Send to the terminal.
  • the relationship “determined by the relationship determined by the N resources in the PDCCH” referred to in this embodiment may also be understood as N DCIs corresponding to the N resources (the N DCIs respectively pass the N resources)
  • the transmission is performed) the relationship determined in the PDCCH.
  • This determined relationship may be information related to the location (or occupied CCE).
  • the terminal receives the downlink control information sent by the base station.
  • the terminal monitors the downlink control channel, and acquires downlink control information of the terminal.
  • the terminal first receives all DCIs in a scheduling time unit through the PDCCH.
  • the DCIs include DCIs belonging to the terminal, and DCIs that do not belong to the terminal, and the terminal needs to monitor the PDCCH, that is, adopt blind detection.
  • the way for example, according to the format of the DCI used, searches for and acquires the DCI belonging to the terminal.
  • the terminal can acquire the relationship determined by the N resources in the PDCCH, when the terminal blindly detects one of the resources, the location of the resource in the PDCCH (or the occupied CCE) is adopted. Relevant information, the related information of the remaining N-1 resources in the PDCCH (or the occupied CCE) can be obtained through the determined relationship, so that the N-1 resources can be directly obtained. If the terminal does not obtain the DCI belonging to the terminal from the one resource, the terminal does not need to perform blind detection to directly find the remaining resources to obtain the repeated transmission of the terminal belonging to the terminal. The DCI performs gain combining and other operations to obtain the correct DCI, thereby greatly reducing the complexity of terminal blind detection.
  • This embodiment is based on the first embodiment and includes all the technical solutions of the first embodiment, and specifically describes the N resources in the PDCCH.
  • the N resources have a certain relationship in the PDCCH, and may be characterized by an aggregation level and a candidate location number corresponding to the candidate location set in which the DCI of the N resources is located.
  • the candidate position number can be understood as "m" in the formula (1).
  • the N aggregation levels and the N candidate location numbers respectively corresponding to the N resources are the same. It can also be understood that the DCIs on the N resources are the same in the CCEs occupied by the corresponding search spaces.
  • the N aggregation levels corresponding to the N resources respectively have at least two aggregation levels different; or, in the N candidate location sets, The N candidate location numbers corresponding to the N resources respectively have at least two candidate location numbers that are different; or, in the N candidate location sets, the N aggregation levels respectively corresponding to the N resources have at least two The aggregation levels are different, and the N candidate location numbers corresponding to the N resources respectively have at least two candidate location numbers that are different.
  • the N aggregation levels respectively corresponding to the N resources are L1 and L2
  • the N candidate locations corresponding to the N resources respectively For m1 and m2 the determined relationship can further obtain the following implementation manners:
  • the base station needs to configure the terminal with a corresponding first candidate position offset ⁇ m1.
  • the terminal detects the candidate location on the second resource, according to ⁇ m1, the terminal can directly find the corresponding candidate location on the first resource.
  • the second candidate position has a certain frequency domain deviation from the first one, thereby obtaining the frequency domain diversity gain.
  • L1 2
  • the number of PDCCH candidates is six
  • the above implementations are different in aggregation level, so that DCI on different resources has different reliability, and more flexible support for spatial diversity implementation.
  • various offsets involved in the foregoing various implementation manners may be performed by the base station through high layer signaling or physical layer signaling, such as media connection.
  • At least one of a media access control-control element (MAC-CE) is notified to the terminal.
  • MAC-CE media access control-control element
  • each of the foregoing implementation manners may correspond to one configuration mode, and in one configuration mode, the terminal has an offset in the one configuration mode, and may be on two resources. Perform blind detection and perform gain combining on the obtained DCI.
  • the N aggregation levels respectively corresponding to the N resources are L1, L2, and L3, and the N candidate locations corresponding to the N resources respectively
  • the numbers are m1, m2, and m3, and the determined relationship can further obtain the following implementation manners:
  • Implementation 7 The relationship between L1 and L2, the relationship between m1 and m2 adopts one of the implementation modes 1-4, the relationship between L2 and L3, and the relationship between m2 and m3 adopts the implementation mode 1 One of -4. At this time, if the two aggregation levels are the same, the resources corresponding to them may be located in the same search space or in different search spaces; otherwise, the resources corresponding to them may only be located in different search spaces.
  • N can be any integer of ⁇ 2 as described above.
  • the rest of the implementation manners will not be repeatedly described in this embodiment, and those skilled in the art can derive analogy from the embodiment.
  • the position of other resources can be quickly determined using the above formula (1), that is, belonging to The location of the CCE dedicated to the DCI of the terminal. This will be readily understood by those skilled in the art.
  • This embodiment is based on the first embodiment and the second embodiment, and includes all the technical solutions of the first embodiment and the second embodiment. This embodiment describes in detail the related technical solutions when the N resources, or the N DCIs corresponding to the N resources, are located in the same search space.
  • the N resources may be located in the same search space, or each located in a different search space.
  • the position of the other resources can be quickly determined using the above formula (1), that is, The location of the CCE occupied by the DCI belonging to the terminal.
  • the N resources may be located in the same search space. At this time, the number of blind detections of the terminal may be further reduced relative to the scenario in which the N resources are located in different search spaces.
  • the CCE occupied by a certain PDCCH candidate m (that is, the PDCCH candidate number is m) can be calculated by the following formula (2):
  • offset is an offset, which enables the terminal to blindly detect the PDCCH in two places.
  • the CCE occupied by a certain PDCCH candidate m (that is, the PDCCH candidate number is m) can be calculated by the following formula (3):
  • the offset can be determined according to the identity of the cell (identity, ID). For different cell identifiers, the corresponding offset is different. This ensures that when one of the two resources is interfered, the other resource will not be offset due to the difference. Being disturbed.
  • ID identity
  • the interference randomization of the PDCCH of different cells is further implemented.
  • the optional base station may notify the terminal of the offset by signaling, or enable the terminal to obtain the offset by a manner agreed in advance with the terminal.
  • the size of the single search space and the number of PDCCH candidates may be doubled with respect to the existing single search space.
  • Table 1 is changed to Table 2 below:
  • Implementation 2 There may be two start positions in the search space, and two formulas may be used for the CCEs occupied by the two resources, for example, formulas (4) and (5) are respectively calculated.
  • N cce, ks1 is the total number of CCEs available in the Kth scheduling time unit of the first resource in the search space
  • N cce, ks2 is the second resource in the search space in the Kth scheduling time unit. The total number of CCEs available for use.
  • This embodiment is based on the above-mentioned first embodiment to the third embodiment, and includes all the technical solutions of the first embodiment to the third embodiment.
  • the N resources are located in the same time domain location of one scheduling time unit, and may also be located in different sub-scheduling time units of one scheduling time unit. For example, they are on different symbols. At this time, the symbols in which the N-sub resources are located may be continuous or discontinuous. When it is not continuous, a certain time is reserved for the blind detection side of the terminal on the previous symbol, and it is advantageous for the terminal to measure the beam.
  • the N resources are located in the same time domain location of one scheduling time unit, that is, the base station simultaneously sends N pieces of control information belonging to the terminal to the terminal.
  • the base station may have N antenna panels.
  • one antenna panel is a module in which a plurality of antenna array elements are arranged in a certain manner, and one antenna panel can be connected to one radio frequency channel.
  • An antenna panel can correspond to one beam.
  • the corresponding terminal also has N antenna panels to implement the technical solution of the embodiment.
  • the blind detection capability of the terminal needs to be considered, that is, the number of blind detections of the terminal cannot exceed the maximum blind detection capability of the terminal.
  • the terminal may use the aggregation level subset search method instead of performing blind detection on the PDCCH channel in a manner of searching for all aggregation levels, so that the number of blind detections can be effectively reduced.
  • the base station may configure a subset of the aggregation level for the terminal, and notify the terminal by using a signaling manner; as another implementation manner, the base station may pass the The terminal pre-agreed in such a manner that the terminal obtains a subset of the aggregation levels.
  • the aggregation level is known to be 1, 2, 4, 8. If the aggregation level subsets 1 and 4 are configured, the terminal only needs to perform aggregation levels 1 and 4 when performing blind detection. Blind detection while ignoring aggregation levels 2 and 8. Because the number of aggregation levels is less than half, the maximum number of blind detections of the terminal can be consistent with the original. In other words, it does not exceed the maximum blind detection capability of the original terminal.
  • FIG. 5 A schematic structural diagram of a communication device 500 provided by the implementation of the present application. As shown in FIG. 5, the communication device 500 includes a transceiver 501, a processor 502, a memory 503, and a bus system 504;
  • the memory 503 is used to store a program.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 503 may be a random access memory (RAM) or a non-volatile memory such as at least one disk storage. Only one memory is shown in the figure, of course, the memory can also be set to a plurality as needed. Memory 503 can also be a memory in processor 502.
  • the memory 503 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set thereof:
  • Operation instructions include various operation instructions for implementing various operations.
  • Operating system Includes a variety of system programs for implementing various basic services and handling hardware-based tasks.
  • the processor 502 controls the operation of the communication device 500, which may also be referred to as a CPU (Central Processing Unit).
  • a bus system 504 which may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like.
  • bus system 504 may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like.
  • bus system 504 may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like.
  • bus system 504 for clarity of description, various buses are labeled as bus system 504 in the figure. For ease of representation, only the schematic drawing is shown in FIG.
  • Processor 502 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 502 or an instruction in a form of software.
  • the processor 502 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 503, the processor 502 reads the information in the memory 503, and performs the method steps of the terminal according to any one of the above embodiments 1 to 4 in combination with the hardware thereof; or the base station according to any one of the above embodiments 1 to 4. Method steps.
  • the communication device 500 provided by the embodiment reduces the complexity of blind detection and gain combining of the terminal by establishing the relationship between the positions of multiple DCIs in the PDCCH that belong to the same terminal and improves the control channel in the communication system. Transmission performance.
  • the various illustrative logic blocks, modules and circuits described in the embodiments of the present application may be implemented by a general purpose processing unit, a digital signal processing unit, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic. Devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the functions described.
  • the general purpose processing unit may be a micro processing unit.
  • the general purpose processing unit may be any conventional processing unit, controller, microcontroller or state machine.
  • the processing unit may also be implemented by a combination of computing devices, such as a digital signal processing unit and a microprocessing unit, a plurality of microprocessing units, one or more microprocessing units in conjunction with a digital signal processing unit core, or any other similar configuration. achieve.
  • the steps of the method or algorithm described in the embodiments of the present application may be directly embedded in hardware, a software module executed by a processing unit, or a combination of the two.
  • the software modules can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium in the art.
  • the storage medium can be coupled to the processing unit such that the processing unit can read information from the storage medium and can store information to the storage medium.
  • the storage medium can also be integrated into the processing unit.
  • the processing unit and the storage medium may be configured in an ASIC, and the ASIC may be configured in the user terminal. Alternatively, the processing unit and the storage medium may also be configured in different components in the user terminal.
  • the above-described functions described in the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, these functions may be stored on a computer readable medium or transmitted as one or more instructions or code to a computer readable medium.
  • Computer readable media includes computer storage media and communication media that facilitates the transfer of computer programs from one place to another.
  • the storage medium can be any available media that any general purpose or special computer can access.
  • Such computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other device or data structure that can be used for carrying or storing Other media that can be read by a general purpose or special computer, or a general or special processing unit.
  • any connection can be appropriately defined as a computer readable medium, for example, if the software is from a website site, server or other remote source through a coaxial cable, fiber optic computer, twisted pair, digital subscriber line (DSL) Or wirelessly transmitted in, for example, infrared, wireless, and microwave, is also included in the defined computer readable medium.
  • DSL digital subscriber line
  • the disks and discs include compact disks, laser disks, optical disks, DVDs, floppy disks, and Blu-ray disks. Disks typically replicate data magnetically, while disks typically optically replicate data with a laser. Combinations of the above may also be included in a computer readable medium.

Abstract

本申请提供了一种接收控制信息的方法,包括:终端接收基站发送的下行控制信息,所述下行控制信息中包括属于所述终端的下行控制信息,其中,所述终端的下行控制信息承载于N份资源,所述N份资源位于一个调度时间单元的下行控制信道中,N为≥2的整数;所述终端监听所述下行控制信道,并获取所述终端的下行控制信息;其中,所述N份资源在所述下行控制信道中具有确定的关系。通过建立属于同一终端多份内容相同的DCI在PDCCH中的位置之间的关系,来降低终端盲检测与增益合并的复杂度,提高通信系统中控制信道的传输性能。其中,该多份内容相同的DCI可以分别通过不同的波束发送。

Description

传输控制信息的方法、设备和系统 技术领域
本申请涉及无线通信技术,尤其涉及一种与控制信息传输的通信方法、设备和系统。
背景技术
随着通信技术的不断发展,高频段通信因为具有较大的带宽以支持高速率的数据通信,得到了广泛的关注。高频段通信因路径衰减大导致通信质量较差,因此通常采用波束赋形(beam forming,BF)的方式对通信质量进行改善。
进一步地,为了增加控制信息传输的鲁棒性,基站可以通过N个波束向终端发送N份内容相同的下行控制信息,即同一份下行控制信息被重复发送N次,以确保终端可以正确接收该下行控制信息。其中,N为≥2的整数。基于此,需要解决如何有效利用多份内容相同的下行控制信息来提高控制信道的传输性能、降低终端侧接收、提取有用信息的复杂度。
发明内容
本申请描述了一种通信系统中传输控制信息的方法、装置和系统。
一方面,本申请的实施例提供一种通信系统中传输控制信号的方法,该方法包括:终端接收基站发送的下行控制信息,所述下行控制信息中包括属于所述终端的下行控制信息,其中,所述终端的下行控制信息承载于N份资源,所述N份资源位于一个调度时间单元的下行控制信道中,N为≥2的整数;所述终端监听所述下行控制信道,并获取所述终端的下行控制信息;其中,所述N份资源在所述下行控制信道中具有确定的关系。
在一种可能的设计中,所述N份资源可以对应于所述基站的N个天线端口集合,其中,所述天线端口集合中,可以至少包含一个天线端口。或者该N份资源可以对应所述基站发射的N个波束。
在一种可能的设计中,上述所述N个天线端口集合中至少两个天线端口集合之间是非准共址的,也即至少两个天线端口集合中任一天线端口集合中的任一天线端口与所述至少两个天线端口集合中其它天线端口集合中任一天线端口是非准共址的。这样所述N个天线端口集合或者所述N个波束的发射方向可以是不同的,因此,本申请技术方案可以较好的对抗在某一个方向上严重的传输信道衰弱现象。
在一种可能的设计中,所述终端接收所述基站发送的第一信息,所述第一信息用于指示所述确定的关系。
在一种可能的设计中所述确定的关系由基站和终端预先约定。如,通过协议预先约定。
在一种可能的设计中,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别和N个候选位置编号均相同。
在一种可能的设计中,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同;或者,在所述N个候选位置集合中,所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同;或者,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同,且所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同。
在一种可能的设计中,所述N份资源分别对应N个候选位置集合,N=2,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别为L1和L2,所述N份资源分别对应的N个候选位置编号为m1和m2,所述N份资源在所述下行控制信道中具有确定的关系,包括:L1=L2,且m1=m2+△m1,△m1为第一偏移量且不等于0;或者,L1=L2+△L1,△L1为第二偏移量且不等于0,且m1=m2mod M,其中,M为L1和L2所对应的候选位置数目中的较小值;或者,L1=L2+△L2,△L2为第三偏移量且不等于0,且m1=(m2+△m2)mod M,△m2为第四偏移量且不等于0,M为L1和L2所对应的候选位置数目中的较小值;其中,mod为取模运算符。若两份资源的候选位置不同,可以保证第二个候选位置相对第一个具有一定的频域偏差,从而获得频域分集增益。若聚合级别不同,可以使得在不同资源上的DCI具有不同的可靠性,更灵活的支持空间分集的实现。
在一种可能的设计中,所述N份资源均位于同一个搜索空间,且所述N份资源分别具有不同的位置偏移量。可选的,所述终端可以接收所述基站发送的包含位置偏移量信息的消息。使N份资源位于同一搜索空间,可以在一定程度上进一步降低盲检测的复杂度。
可选的,所述位置偏移量可以与小区标识绑定,对不同的小区标识,对应的位置偏移量不同,这样保证了N份资源中的其中一份资源受到干扰时,其它资源由于位置偏移量不同,不会受到干扰。进一步实现不同小区的PDCCH的干扰随机化。
在一种可能的设计中,所述N份资源位于一个调度时间单元相同的时域位置,所述终端使用聚合级别集合的子集对所述下行控制信道进行盲检测。可选的,所述终端接收所述基站发送的包含所述聚合级别的子集的信息的消息。如此,可以控制终端不会超过其最大盲检测能力的上限。
在一种可能的设计中所述N份资源位于一个调度时间单元的N个不同的子调度时间单元。
另一方面,本申请的实施例提供一种通信系统中传输控制信号的方法,该方法包括:基站获取N份资源在下行控制信道中确定的关系,所述N份资源位 于一个调度时间单元;所述基站根据所述确定的关系,向所述终端发送下行控制信息,所述下行控制信息中包括属于所述终端的下行控制信息,所述终端的下行控制信息承载于所述N份资源,N为≥2的整数。在一种可能的设计中,所述N份资源可以对应于所述基站的N个天线端口集合,其中,所述天线端口集合中,可以至少包含一个天线端口。或者该N份资源可以对应所述基站发射的N个波束。
在一种可能的设计中,上述所述N个天线端口集合中至少两个天线端口集合之间是非准共址的,也即至少两个天线端口集合中任一天线端口集合中的任一天线端口与所述至少两个天线端口集合中其它天线端口集合中任一天线端口是非准共址的。这样所述N个天线端口集合或者所述N个波束的发射方向可以是不同的,因此,本申请技术方案可以较好的对抗在某一个方向上严重的传输信道衰弱现象。
在一种可能的设计中,所述基站向所述终端发送第一信息,所述第一信息用于指示所述确定的关系。
在一种可能的设计中所述确定的关系由基站和终端预先约定。如,通过协议预先约定。
在一种可能的设计中,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别和N个候选位置编号均相同。
在一种可能的设计中,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同;或者,在所述N个候选位置集合中,所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同;或者,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同,且所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同。
在一种可能的设计中,所述N份资源分别对应N个候选位置集合,N=2,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别为L1和L2,所述N份资源分别对应的N个候选位置编号为m1和m2,所述N份资源在所述下行控制信道中具有确定的关系,包括:L1=L2,且m1=m2+△m1,△m1为第一偏移量且不等于0;或者,L1=L2+△L1,△L1为第二偏移量且不等于0,且m1=m2mod M,其中,M为L1和L2所对应的候选位置数目中的较小值;或者,L1=L2+△L2,△L2为第三偏移量且不等于0,且m1=(m2+△m2)mod M,△m2为第四偏移量且不等于0,M为L1和L2所对应的候选位置数目中的较小值;其中,mod为取模运算符。若两份资源的候选位置不同,可以保证第二个候选位置相对第一个具有一定的频域偏差,从而获得频域分集增益。若聚合级别不同,可以使得在不同资源上的DCI具有不同的可靠性,更灵活的支持空间分集的实现。
可选的所述△m1,△m2,△L1和△L2中的任意一个可以由所述基站向所述终端进行通知。
在一种可能的设计中,所述N份资源均位于同一个搜索空间,且所述N份资源分别具有不同的位置偏移量。可选的,所述基站可以向所述终端发送发送包含位置偏移量信息的消息。使N份资源位于同一搜索空间,可以在一定程度上进一步降低盲检测的复杂度。
可选的,所述位置偏移量可以与小区标识绑定,对不同的小区标识,对应的位置偏移量不同,这样保证了N份资源中的其中一份资源受到干扰时,其它资源由于位置偏移量不同,不会受到干扰。进一步实现不同小区的PDCCH的干扰随机化。
在一种可能的设计中,所述N份资源位于一个调度时间单元相同的时域位置,所述基站向所述终端发送第三信息,所述第三信息用于指示所述聚合级别的子集,所述所述聚合级别的子集为所述终端对所述下行控制信道进行盲检测时所使用。如此,可以控制终端不会超过其最大盲检测能力的上限。
在一种可能的设计中所述N份资源位于一个调度时间单元的N个不同的子调度时间单元。
另一方面,本发明实施例提供了一种通信设备,该设备可以是终端,具有实现上述方法设计中终端行为的功能。所述功能可以通过硬件实现,终端的结构中包括收发器和处理器。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模块。所述模块可以是软件和/或硬件。
另一方面,本发明实施例提供了另一种通信设备,该设备可以是基站,具有实现上述方法实际中基站行为的功能。所述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模块。
又一方面,本发明实施例提供了一种通信系统,该系统包括上述方面所述的基站和终端。
再一方面,本发明实施例提供了一种计算机存储介质,用于储存为上述终端所用的计算机软件指令,其包含用于执行上述方面所设计的程序。
再一方面,本发明实施例提供了一种计算机存储介质,用于储存为上述基站所用的计算机软件指令,其包含用于执行上述方面所设计的程序。
本申请的技术方案,通过建立属于同一终端多份内容相同的DCI在PDCCH中的位置之间的关系,来降低终端盲检测与增益合并的复杂度,提高通信系统中控制信道的传输性能。其中,该多份内容相同的DCI可以分别通过不同的波束发送。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施 例或现有技术描述中所需要使用的附图作简单地介绍。
图1为通信系统的一种基础架构;
图2为一种终端的结构示意图;
图3为一种基站的结构示意图;
图4为一种控制信息的传输方法的流程图;
图5为一种通信设备的结构示意图。
具体实施方式
在长期演进(long term evolution,LTE)系统中,下行控制信道(physical downlink control channel,PDCCH)是传输下行物理层控制信令的主要承载信道,承载的物理层控制信息包括上行/下行数据传输的调度信息和上行功率控制命令信息。PDCCH的传输以控制信道元素(control channel element,CCE)的形式来组织,一个CCE由9个资源粒子组(resource element group,REG)组成。一个PDCCH在连续的CCE上传输。根据所占用的CCE数目的不同,定义了4种PDCCH大小,分别占用1、2、4、8个CCE,并对应聚合等级(aggregation level)1、2、4、8。
PDCCH由基站向终端发送。终端对PDCCH的接收采用盲检测的方式,即终端可以监听所述PDCCH,根据可能所使用的下行控制信息(downlink control information,DCI)的大小,解调所有可能属于自身的PDCCH,搜索属于自身的DCI。也就是说,终端可以根据所需要监听的DCI的格式,来尝试解码PDCCH候选位置(PDCCH candidates)集合中的PDCCH,该集合可以被称为所述终端的搜索空间(search space)。搜索空间可以分为公共搜索空间(common search space)和用户设备(user equipment,UE)特定的搜索空间(UE-specific search space)。公共搜索空间用于传输与寻呼paging、广播控制信道(broadcast control channel,BCCH)等相关的小区级别的公共控制信息,用户设备特定的搜索空间用于传输与下行数据、上行数据等相关的UE级别的控制信息。
进一步地,第三代合作伙伴项目(the 3rd generation partnership project,3GPP)技术规范(technical specification,TS)36.213版本14.1.0(v14.1.0)中表格9.1.1-1(UE检测的PDCCH candidate)如下表1所示:
Figure PCTCN2018078728-appb-000001
表1
从上表中可知,例如,对于UE特定的搜索空间,若聚合级别L=2,PDCCH占用的CCE数量为12个,终端需要监听的PDCCH的候选数目为6个。
搜索空间
Figure PCTCN2018078728-appb-000002
内的某个PDCCH candidate m(即PDCCH candidates的编号为m)所占用的CCE可以通过如下公式(1)计算:
Figure PCTCN2018078728-appb-000003
其中,i=0,...,L-1,且m=0,...,M (L)-1,L为聚合级别,M (L)为给定搜索空间内需要监听的PDCCH的候选数目,N CCE,k为子帧k中所有可供PDCCH使用的CCE总数。对于公共搜索空间,Y k=0;对于UE特定搜索空间,Y k=(A·Y k-1)modD。其中,Y -1=n RNTI≠0,A=39827,D=65537,
Figure PCTCN2018078728-appb-000004
ns为系统中的时隙(slot)号,nRNTI的值根据PDCCH不同而不同,可以是系统信息(system information,SI)-无线网络临时标识(radio network temporary identity,RNTI)、寻呼RNTI(paging-RNTI,P-RNTI)或随机接入RNTI(random access-RNTI,RA-RNTI)等标识。
另外,公共搜索空间的起始位置从CCE0开始,而UE特定搜索空间的起始位置可以通过公式(1),(令i=0)计算得出。
如背景技术所述,高频段通信可以采用BF的方式,基于波束进行通信。例如,采用模拟波束的情况下,同一个天线面板在同一时间可以形成一个方向的模拟波束。根据3GPP技术规范组(technical specification group,TSG)无线接入网(radio access network,RAN)工作组(work group,WG)1第88次会议达成的结论,终端能够在多个波束上监听PDCCH,这种监听可以是同时的,也可以是不同时的。为了增强PDCCH中DCI的鲁棒性。基站可以通过N个波束向终端发送内 容相同的DCI,即同一份DCI被重复发送N次,(N为≥2的正整数),以确保终端可以正确接收该DCI。一种可能的实现方式是,N=2,即基站通过2个波束向终端分别发送2份相同的DCI。
在终端侧,采用盲检测的方式对PDCCH进行接收。例如,终端在第一个波束上的PDCCH中盲检测属于自身的DCI,如果没有检测到足够的信息,则继续在另外一个波束上的PDCCH中盲检测属于自身的DCI,依次类推。这样,终端能够通过将这些信息合并,以获得合并增益,正确地获得属于自身的DCI。
如果想要取得合并增益,终端可能在盲检测第二个或者更多个波束上的PDCCH中的DCI时,对于每一个候选位置,都去和第一个波束中DCI的全部候选位置做一个信息合并。这样,终端总的盲检测的次数会是多次盲检测次数相乘后的值,显然对于终端来说,复杂度过高,开销太大。
本申请就是通过建立,属于同一终端多份内容相同的DCI在PDCCH中的位置之间的关系,来降低终端盲检测与增益合并的复杂度,提高通信系统中控制信道的传输性能。其中,该多份内容相同的DCI可以分别通过不同的波束发送。
下面介绍一下本申请的系统运行环境,本申请描述的技术可以适用于LTE系统,或其他采用各种无线接入技术的无线通信系统,例如采用码分多址(code division multiple access,CDMA),频分多址(frequency division multiple access,FDMA),时分多址(time division multiple access,TDMA),正交频分多址(orthogonal frequency division multiple access,OFDMA),单载波频分多址(single carrier-frequency division multiple access,SC-FDMA)等接入技术的系统,还适用于后续的演进系统,如第五代5G(还可以称为新无线电(new radio,NR))系统等。如图1所示,为通信系统的一种基础架构。基站和终端通过无线接口可以进行数据或者信令的传输,包括上行传输和下行传输。其中,基站可以将各种物理层控制信息,包括上行/下行数据传输的调度信息和上行功率控制命令,承载于PDCCH发送给终端。需要说明的是,在不同的通信系统中PDCCH以及承载现在PDCCH中的DCI可能具有不同的名称,本申请对此不做限制,以下都以PDCCH称呼具有该类似功能的信道,都以DCI来称呼具有类似功能的控制信息。
本申请所涉及到的终端可以为向用户提供语音和/或数据连通性的设备(device),包括有线终端和无线终端。无线终端可以是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其他处理设备,经无线接入网与一个或多个核心网进行通信的移动终端。例如,无线终端可以为移动电话、计算机、平板电脑、个人数码助理(personal digital assistant,PDA)、移动互联网设备(mobile Internet device,MID)、可穿戴设备和电子书阅读器(e-book reader)等。又如,无线终端也可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动设备。再如,无线终端可以为移动站(mobile station)、接入点(access point)。前述提及的UE即为终端的一种,是在LTE系统中的称谓。为方便描述,本申请后续的描述中,上面提到的设备统称为终端。本申请所涉及到的基站是一种部署在无线接 入网(radio access network,RAN)中用以为终端提供无线通信功能的装置。所述基站可以包括各种形式的宏基站,微基站,中继站,接入点基站控制器,收发节点(transmission reception point,TRP)等等。在采用不同的无线接入技术的系统中,基站的具体名称可能会有所不同,例如在LTE系统中,称为演进的节点B(evolved NodeB,eNB),在LTE系统后续的演进系统中,还可以称为下一代无线节点B(generation nodeB,gNB)。进一步的,如上所述的终端可以如图2所示的终端200,用于执行本申请所涉及的各种实施例中与终端相关的方法步骤。如图2所示,终端200包括处理单元210和收发单元220。如上所述的基站可以是如图3所示的基站300,用于执行本申请所涉及的各种实施例中与基站相关的方法步骤。如图3所示,基站300包括处理单元310和收发单元320。需要说明的是,处理单元210或者收发单元220所执行的操作都可以视为是终端200的操作,所述处理单元310或者所述收发单元320所执行的操作都可以视为是基站300的操作。所述基站300中的处理单元310可以由基站300的处理器实现,所述收发单元320可以由基站300中的收发器实现;所述终端200中的处理单元210可以由终端200中的处理器实现,所述收发单元220可以由终端200中的收发器实现。
下面对本申请中涉及到的名词做一些说明。
本申请涉及名词“波束”,可以理解的是,一个波束内可以包括一个或多个天线端口,用于传输数据信道,控制信道和探测信号等。例如,发射波束可以是指信号经天线发射出去后在空间不同方向上形成的信号强度的分布,接收波束可以是指从天线上接收到的无线信号在空间不同方向上的信号强度分布。另外,形成一个波束的一个或多个天线端口也可以看作是一个天线端口集。
本申请涉及名词“调度时间单元”,可以理解的是,通信系统中对数据的调度和传输,一般都是基于所述调度时间单元的,调度时间单元也可以被称为最小调度单元。例如,在LTE系统中可以是传输时间间隔(transmission time interval,TTI),LTE系统后续演进的通信系统(例如,新无线电(new radio,NR)系统)中还可以为slot、时域符号、由一个或多个时域符号组成的迷你时隙(mini slot)、由多个slot、或者mini-slot聚合组成。其中,时域符号可以是正交频分复用(orthogonal frequency division multiplexing,OFDM)符号,也可以SC-FDMA符号。
本申请所涉及短语“监听PDCCH”,也可以理解为监听所述PDCCH所在的候选位置集合,其中,所述监听可以理解为:根据所有监听的DCI格式,尝试解码所述候选位置集合中的每个PDCCH。
本申请所涉及短语“多份内容相同的DCI”,可以理解的是,并不是一定指的是实际传输中完全一致的多份DCI,例如,它们互相之间可以具有不同的冗余版本,但是通过增益合并等方式,它们可以恢复出内容指示一致的DCI,使得所述终端可以执行确定的一个动作。
实施例一
本实施例提供了一种控制信息的传输方法的流程图。
如图4所示,401部分,基站获取N份资源在下行控制信道中确定的关系,所述N份资源位于一个调度时间单元。
402部分,所述基站根据所述确定的关系,向所述终端发送下行控制信息,所述下行控制信息中包括属于所述终端的下行控制信息,所述终端的下行控制信息承载于所述N份资源,N为≥2的整数。
本申请的技术方案中,为了增强DCI传输的鲁棒性、提高终端正确接收属于自身的DCI的效率,所述基站可以选择将内容相同的DCI在PDCCH中发送N次,N为≥2的整数,以确保终端可以正确的接收。需要注意的是,该DCI的发送是在同一个调度时间单元中实现的,也即,承载这N份内容相同的DCI的N份资源位于同一个调度时间单元当中。一份DCI是与一个调度时间单元相对应的。
可选的,该N份资源可以对应于所述基站的N个天线端口集合,其中,所述天线端口集合中,可以至少包含一个天线端口。或者该N份资源可以对应所述基站发射的N个波束。因为所述N个天线端口集合或者所述N个波束的发射方向可以是不同的,因此,本申请技术方案可以较好的对抗在某一个方向上严重的传输信道衰弱现象。也即,即使N个天线端口集合(或者所述N个波束)中某一个或者多个天线端口集合(或者N个波束)的信号传输因为传输信道衰弱,终端无法通过该天线端口集合(或者N个波束)正确解调DCI,其余传输信道质量比较好的天线端口集合(或者波束)的信号传输仍能够保证所述DCI最终被终端正确解调。进一步的,当该N份资源对应于所述基站的N个天线端口集合时,所述N个天线端口集合中至少两个天线端口集合之间为非准共址(quasi co-located,QCL)的。可选的,所述非QCL指的是关于空间参数非QCL。天线端口集合之间为非QCL是指,其中一个天线端口集合中的所有天线端口与另一个天线端口集合之间的所有天线端口是非QCL的。同一天线端口集合内若存在多个天线端口,那么它们之间可以是QCL的。所谓天线端口QCL指的是:传输一个天线端口上一个符号的信道的参数能够被传输另外一个天线端口上一个符号的信道推断出。其中,该参数可以为时延扩展,多普勒扩展,多普勒频移,平均时延,平均增益,到达角(Angle of arrival,AOA),平均AOA、AOA扩展,离开角(Angle of Departure,AOD),平均AOD、AOD扩展,接收天线空间相关性参数,发送波束,接收波束,资源标识中的至少一个。其中,空间参数可以包括:AOA,平均AOA,AOA扩展,AOD,平均AOD,AOD扩展,接收天线空间相关性参数,发送波束,接收波束,资源标识等。所述波束包括以下至少一个,预编码,权值序号,波束序号。所述角度可以为不同维度的分解值,或不同维度分解值的组合。所述的天线端口为具有不同天线端口编号的天线端口,和/或具有相同天线端口号在不同时间和/或频率和/或码域资源内进行信息发送或接收的天线端口,和/或具有不同天线端口号在不同时间和/或频率和/或码域资源内进行信息发送或接收的天线端口。所述资源标识包括信道状态信息参考信号(Channel State Information  Reference Signal,CSI-RS)资源标识,或SRS资源标识,用于指示资源上的波束。或者,所述N个波束中至少存在两个波束的传输方向是不相同的。
为了降低终端侧因盲检而带来的复杂度,本技术方案建立了这N份资源在所述PDCCH中确定的关系,也即,通过其中一份资源在所述PDCCH中所处位置(或者所占用的CCE)的相关信息,终端可以通过该确定的关系,直接获得其余N-1份资源在所述PDCCH中所处位置(或者所占用的CCE)的相关信息,从而有效降低终端盲检测的次数。例如,所述位置(或者所占用的CCE)的相关信息可以是与所述PDCCH对应的搜索空间的聚合级别和候选位置编号。所述确定的关系将会在后续实施例中详细描述。
401部分中,基站获取N份资源在PDCCH中确定的关系,其中具体可以至少包括如下两种实现方式:1、所述基站通过与所述终端的预先约定,例如协议规定,得到所述N份资源在所述下行控制信道中确定的关系。2、所述基站根据通信的实际情况等,实时为所述终端配置所述N份资源在所述PDCCH中确定的关系。
对应的,在终端侧,所述终端也可以对应的通过两种方式获知所述确定的关系:1、所述终端通过与所述基站的预先约定,例如协议规定,得到所述N份资源在所述下行控制信道中确定的关系。2、所述终端接收所述基站实时发送的第一信息,所述第一信息用于指示所述确定的关系。
在获取了所述N份资源在PDCCH中确定的关系确定的关系之后,基站可以将属于所述终端的DCI转化为N份,分别承载在所述N份资源上、在一个调度时间单元内全部发送给所述终端。
本实施例中所指的“N份资源在PDCCH中确定的关系确定的关系”,也可以理解为与所述N份资源对应的N份DCI(所述N份DCI分别通过所述N份资源进行传输)在PDCCH中确定的关系。这种确定的关系可以是与位置(或者占用的CCE)相关的信息。
所述终端接收所述基站发送的所述下行控制信息。
403部分,所述终端监听所述下行控制信道,并获取所述终端的下行控制信息。
终端先通过PDCCH把一个调度时间单元上所有的DCI接收下来,这些DCI中包括了属于所述终端的DCI,也会包括不属于所述终端的DCI,需要所述终端监听PDCCH,即采用盲检测的方式,例如根据所使用的DCI的格式,搜索并获取属于所述终端的DCI。
如前所述,因为终端可以获取所述N份资源在PDCCH中确定的关系,所以终端对其中一份资源盲检测时,通过该份资源在所述PDCCH中所处位置(或者占用的CCE)的相关信息,就能够通过所述确定的关系获知其余N-1份资源的在所述PDCCH中所处位置(或者占用的CCE)的相关信息,从而可以直接获得所述N-1份资源在所述PDCCH中的位置,若终端没有从所述一份资源上获得属于所述终端的DCI,不需要再进行盲检测就能直接找到其余的资源去获取所述基站重复 发送的属于所述终端的DCI,进行增益合并等操作获取正确的DCI,从而大大降低了终端盲检测的复杂度。
实施例二
本实施例是基于实施例一并且包括了实施例一所有的技术方案,并对所述N份资源在PDCCH中具有确定的关系进行了具体说明。
如实施例一所述,所述N份资源在PDCCH中具有确定的关系,可以通过承载于所述N份资源的DCI所在的候选位置集合中所对应的聚合级别和候选位置编号来表征。其中所述候选位置编号可以理解为公式(1)中的“m”。
作为一种实现方式,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别和N个候选位置编号均相同。也可以理解为,N份资源上的DCI在对应的搜索空间所占用的CCE对应相同。
作为另一种实现方式,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同;或者,在所述N个候选位置集合中,所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同;或者,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同,且所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同。
进一步的,当N=2时,假设在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别为L1和L2,所述N份资源分别对应的N个候选位置编号为m1和m2,所述确定的关系还可以进一步获得如下几种实现方式:
实现方式1:L1=L2,m1=m2。此时两份资源可以位于两个搜索空间中,或者位于一个搜索空间中。
实现方式2:L1=L2,且m1=m2+△m1,△m1不等于0。即聚合级别相同,且候选位置编号之间具有偏移量。此时两份资源可以位于两个搜索空间中,或者位于一个搜索空间中。
在这种情况下,所述基站需要给所述终端配置对应的第一候选位置偏移量△m1。所述终端在检测第二份资源上的候选位置的时候,根据△m1,就可以直接找到第一份资源上对应的候选位置。通过两份资源的候选位置不同,可以保证第二个候选位置相对第一个具有一定的频域偏差,从而获得频域分集增益。
实现方式3:L1=L2+△L1,△L1不等于0,且m1=m2mod M,其中,M为L1和L2所对应的候选位置数目中的较小值。mod为取模运算符。即聚合级别之间具有偏移量,而候选位置编号(取模后)相同,取模是为了实现在候选位置数不同时,仍能建立彼此之间有规律的简单对应关系。此时因为两份资源的聚合级别不同,所以该两份资源应位于两个搜索空间中。
例如,结合参照前述表1,L1=2,则PDCCH候选数目为6个,L2=8,则PDCCH候选数目为2,则L1=L2+6,则△L1=6。M=2,m2=0时,m1=0,m2=1时,m1=1。
又例如:L1=8,则PDCCH候选数目为2,L=2,则PDCCH候选数目为6个,则L1=L2-6,△L1=-6。M=2,m2=0时,m1=0;m2=1时,m1=1;m2=2时,m1=0;m2=3时,m1=1;m2=4时,m1=0;m2=5时,m1=1。
以上实现方式因为聚合级别不同,从而使得在不同资源上的DCI具有不同的可靠性,更灵活的支持空间分集的实现。
实现方式4:L1=L2+△L2,△L2不等于0,且m1=(m2+△m2)mod M,△m2不等于0,M为L1和L2所对应的候选位置数目中的较小值。mod为取模运算符。即聚合级别和候选位置编号(取模后)都具有偏移量。此时因为两份资源的聚合级别不同,所以该两份资源应两个搜索空间中。
例如,再次结合参照表1,L1=2,则PDCCH候选数目为6个,L2=8,则PDCCH候选数目为2,则L1=L2+6,则△L1=6。M=2,△m2=1,m2=0时,m1=1;m2=1时,m1=0。
又例如:L1=8,则PDCCH候选数目为2,L=2,则PDCCH候选数目为6个,则L1=L2-6,△L1=-6。M=2,△m2=1,m2=0时,m1=1;m2=1时,m1=0;m2=2时,m1=1;m2=3时,m1=0;m2=4时,m1=1;m2=5时,m1=0。
实现方式4为以上4中实现方式中最灵活的实现方式。
可选的,上述各种实现方式中所涉及的各种偏移量,如△m1,△L1,△m2,△L2等可以由所述基站通过高层信令或者物理层信令,例如媒体接入控制-控制元素(media access control-control element,MAC-CE)中的至少一种向终端进行通知。
可选的,上述各种实现方式可以分别对应一种配置模式,在其中一种配置模式下,所述终端结合在所述一种配置模式下的具有的偏移量,可以对两份资源上进行盲检测,对获得的DCI进行增益合并。
或者,当N=3时,假设在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别为L1、L2和L3,所述N份资源分别对应的N个候选位置编号为m1、m2和m3,所述确定的关系还可以进一步获得如下几种实现方式:
实现方式5:L1=L2=L3,m1=m2=m3。此时三份资源可以位于三个搜索空间中,或者位于一个搜索空间中。
实现方式6:L1=L2=L3,且m1=m2+△m3,m3=m2+△m4,△m3和△m4不等于0。即聚合级别相同,且候选位置编号之间具有偏移量。此时三份资源可以位于三个搜索空间中,或者位于一个搜索空间中。
实现方式7:L1与L2之间的关系,m1与m2之间的关系采用实现方式1-4中的其中一种,L2与L3之间的关系,m2与m3之间的关系采用实现方式1-4中其中一种。此时,若两个聚合级别相同,则与它们对应的资源可以位于同一搜索空间,也可以位于不同的搜索空间;否则,与它们对应的资源只能位于不同的搜索空间中。
当然N的取值如前所述,可以为≥2的任意整数,本实施例在此不再一一赘述 其余的实现方式,本领域的技术人员能够更具本实施例类推而得出。
当N份资源位于N个搜索空间中时,根据对其中一份资源完整的盲检测的结果,以及所述确定的关系,可以使用上述公式(1)快速地确定其它资源的位置,也即属于所述终端的DCI所专用的CCE的位置。这对于本领域技术人员来说是容易理解的。
实施例三
本实施例是基于实施例一和实施例二,且包括了实施例一和实施例二所有的技术方案。本实施例详细介绍了,当所述N份资源,或者说与所述N份资源对应的N份DCI,位于同一个搜索空间中时相关的技术方案。
在实施例二中提到,所述N份资源可以位于同一搜索空间,或者各自位于不同的搜索空间中。当N份资源各自位于N个搜索空间中时,根据对其中一份资源完整的盲检测的结果,以及所述确定的关系,可以使用上述公式(1)快速地确定其它资源的位置,也即属于所述终端的DCI所占用的CCE的位置。
若满足所述N份资源分别对应的聚合级别相同,那么所述N份资源就可以位于同一个搜索空间中。此时,相对于N份资源各自位于不同的搜索空间的场景,终端的盲检测次数可能进一步降低。
仍以N=2为例进行阐述:
实现方式1:所述搜索空间中只有1个开始位置,则可以对两份资源上的CCE进行统一编号。
当所述两份资源位于同一个调度时间单元的不同子调度时间单元(如,符号)时,搜索空间
Figure PCTCN2018078728-appb-000005
内的某个PDCCH candidate m(即PDCCH candidates的编号为m)所占用的CCE可以通过如下公式(2)计算:
Figure PCTCN2018078728-appb-000006
其中,k1,k2分别对应两个子调度时间单元,offset为偏移量,这使得所述终端在两个地方对PDCCH进行盲检测。
当所述两份资源位于同一个调度时间单元的相同子调度时间单元(如,符号)时,搜索空间
Figure PCTCN2018078728-appb-000007
内的某个PDCCH candidate m(即PDCCH candidates的编号为m)所占用的CCE可以通过如下公式(3)计算:
Figure PCTCN2018078728-appb-000008
将j=0和j=1时对应的每次检测进行合并,就可以降低盲检测的合并复杂度。
offset可以根据小区标识(identity,ID)来确定,对不同的小区标识,对应的offset不同,这样保证了两份资源中的其中一份资源受到干扰时,另一份资源由于offset不同,不会受到干扰。进一步实现不同小区的PDCCH的干扰随机化。
可选的基站可以通过信令向所述终端通知所述offset,或者通过与所述终端预先约定的方式,使终端获得所述offset。
此时,单个搜索空间的size和PDCCH候选数目可能会相对于现有的单个搜索空间翻倍。例如对于UE特定搜索空间,表1变更为如下表2:
Figure PCTCN2018078728-appb-000009
表2
实现方式2:所述搜索空间中可以对应有2个开始位置,则可以对两份资源所占用的CCE使用两个公式,例如,公式(4)和(5)分别进行计算。
Figure PCTCN2018078728-appb-000010
Figure PCTCN2018078728-appb-000011
其中,N cce,ks1为搜索空间中第一份资源在第K个调度时间单元中可供使用的CCE总数,N cce,ks2为搜索空间中第二份资源在第K个调度时间单元中可供使用的CCE总数。
实施例四
本实施例是基于上述实施例一到实施例三,并且包括了实施例一到实施例三所有的技术方案。
所述N份资源位于一个调度时间单元的相同时域位置,也可以位于一个调度时间单元的不同子调度时间单元。例如,位于不同的符号上。此时所述N分资源所位于的符号之间可以是连续的,也可以是不连续的。当不连续时,为前一个符号上所述终端的盲检侧预留了一定的时间,并且有利于终端对波束进行测量。
本实施例中,特别的,所述N份资源位于一个调度时间单元的相同时域位置,也即基站同时向所述终端发送N份属于所述终端的控制信息。
此时,所述基站可以具有N个天线面板。其中,一个天线面板是多个天线阵元的集合以一定方式排列构成的模块,一个天线面板可以连接到一个射频通道。一个天线面板可以对应一个波束。对应的所述终端也具有N个天线面板来实现本实施例的技术方案。
因为所述终端需要在同一时间段对N份资源同时进行检测,需要考虑所述终端的盲检测能力,即,所述终端的盲检测次数不能超过所述终端的最大盲检测能力。
可选的,所述终端可以使用聚合级别的子集搜索的方式,而不是采用对所有聚合级别搜索的方式对所述PDCCH信道进行盲检测,这样就能有效降低盲检测的次数。
作为一种实现方式,所述基站可以为所述终端配置所述聚合级别的子集,并通过信令的方式通知给所述终端;作为另一种实现方式,所述基站可以通过与所述终端预先约定的方式,使得所述终端获得所述聚合级别的子集。
以N=2为例,已知聚合级别为1,2,4,8,如果配置的聚合级别子集1和4,那么所述终端在进行盲检测的时候只需要对聚合级别1和4进行盲检测,而忽略聚合级别2和8。因为聚合级别的个数少了一半,所述终端的最大盲检测次数就能和原先保持一致。也就是说,不会超过原先终端的最大盲检测能力。
实施例五
本申请实施提供的一种通信设备500的结构示意图。如图5所示,该通信设备500包括收发器501、处理器502、存储器503和总线系统504;
其中,存储器503,用于存放程序。具体地,程序可以包括程序代码,程序代码包括计算机操作指令。存储器503可能为随机存取存储器(random access memory,RAM),也可能为非易失性存储器(non-volatile memory),例如至少一个磁盘存储器。图中仅示出了一个存储器,当然,存储器也可以根据需要,设置为多个。存储器503也可以是处理器502中的存储器。
存储器503存储了如下的元素,可执行模块或者数据结构,或者它们的子集,或者它们的扩展集:
操作指令:包括各种操作指令,用于实现各种操作。
操作系统:包括各种系统程序,用于实现各种基础业务以及处理基于硬件的任务。
处理器502控制通信设备500的操作,处理器502还可以称为CPU(Central Processing Unit,中央处理单元)。具体的应用中,通信设备500的各个组件通过总线系统504耦合在一起,其中总线系统504除包括数据总线之外,还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见,在图中将各种总线都标为总线系统504。为便于表示,图5中仅是示意性画出。
上述实施例一至四任一揭示的终端的方法;或者上述实施例一至四任一揭示的基站的方法可以应用于处理器502中,或者由处理器502实现。处理器502可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法的各步骤可以通过处理器502中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器502可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器503,处理器502读取存储器503中的信息,结合其硬件执行上述实施例一至四任一所述的终端的方法步骤;或者结合上述实施例一至四任一所述的基站的方法步骤。
通过本实施例提供的通信设备500,通过建立,属于同一终端多份内容相同的DCI在PDCCH中的位置之间的关系,来降低终端盲检测与增益合并的复杂度,提高通信系统中控制信道的传输性能。
本领域技术人员还可以了解到本申请实施例列出的各种说明性逻辑块(illustrative logical block)和步骤(step)可以通过电子硬件、电脑软件,或两者的结合进行实现。为清楚展示硬件和软件的可替换性(interchangeability),上述的各种说明性部件(illustrative components)和步骤已经通用地描述了它们的功能。这样的功能是通过硬件还是软件来实现取决于特定的应用和整个系统的设计要求。本领域技术人员可以对于每种特定的应用,可以使用各种方法实现所述的功能,但这种实现不应被理解为超出本发明实施例保护的范围。
本申请实施例中所描述的各种说明性的逻辑块,模块和电路可以通过通用处理单元,数字信号处理单元,专用集成电路(ASIC),现场可编程门阵列(FPGA)或其它可编程逻辑装置,离散门或晶体管逻辑,离散硬件部件,或上述任何组合的设计来实现或操作所描述的功能。通用处理单元可以为微处理单元,可选地,该通用处理单元也可以为任何传统的处理单元、控制器、微控制器或状态机。处理单元也可以通过计算装置的组合来实现,例如数字信号处理单元和微处理单元,多个微处理单元,一个或多个微处理单元联合一个数字信号处理单元核,或任何其它类似的配置来实现。
本申请实施例中所描述的方法或算法的步骤可以直接嵌入硬件、处理单元执行的软件模块、或者这两者的结合。软件模块可以存储于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、可移动磁盘、CD-ROM或本领域中其它任意形式的存储媒介中。示例性地,存储媒介可以与处理单元连接,以使得处理单元可以从存储媒介中读取信息,并可以向存储媒介存 写信息。可选地,存储媒介还可以集成到处理单元中。处理单元和存储媒介可以配置于ASIC中,ASIC可以配置于用户终端中。可选地,处理单元和存储媒介也可以配置于用户终端中的不同的部件中。
在一个或多个示例性的设计中,本发明实施例所描述的上述功能可以在硬件、软件、固件或这三者的任意组合来实现。如果在软件中实现,这些功能可以存储与电脑可读的媒介上,或以一个或多个指令或代码形式传输于电脑可读的媒介上。电脑可读媒介包括电脑存储媒介和便于使得让电脑程序从一个地方转移到其它地方的通信媒介。存储媒介可以是任何通用或特殊电脑可以接入访问的可用媒体。例如,这样的电脑可读媒体可以包括但不限于RAM、ROM、EEPROM、CD-ROM或其它光盘存储、磁盘存储或其它磁性存储装置,或其它任何可以用于承载或存储以指令或数据结构和其它可被通用或特殊电脑、或通用或特殊处理单元读取形式的程序代码的媒介。此外,任何连接都可以被适当地定义为电脑可读媒介,例如,如果软件是从一个网站站点、服务器或其它远程资源通过一个同轴电缆、光纤电脑、双绞线、数字用户线(DSL)或以例如红外、无线和微波等无线方式传输的也被包含在所定义的电脑可读媒介中。所述的碟片(disk)和磁盘(disc)包括压缩磁盘、镭射盘、光盘、DVD、软盘和蓝光光盘,磁盘通常以磁性复制数据,而碟片通常以激光进行光学复制数据。上述的组合也可以包含在电脑可读媒介中。
本发明说明书的上述描述可以使得本领域技术任何可以利用或实现本发明的内容,任何基于所公开内容的修改都应该被认为是本领域显而易见的,本发明所描述的基本原则可以应用到其它变形中而不偏离本发明的发明本质和范围。因此,本发明所公开的内容不仅仅局限于所描述的实施例和设计,还可以扩展到与本发明原则和所公开的新特征一致的最大范围。

Claims (36)

  1. 一种接收控制信息的方法,其特征在于,所述方法包括:
    终端接收基站发送的下行控制信息,所述下行控制信息中包括属于所述终端的下行控制信息,其中,所述终端的下行控制信息承载于N份资源,所述N份资源位于一个调度时间单元的下行控制信道中,N为≥2的整数;
    所述终端监听所述下行控制信道,并获取所述终端的下行控制信息;其中,所述N份资源在所述下行控制信道中具有确定的关系。
  2. 如权利要求1所述的方法,其特征在于,所述N份资源中至少两份资源分别对应的天线端口之间是非准共址的。
  3. 如权利要求1或者2所述的方法,其特征在于,所述方法还包括:
    所述终端接收所述基站发送的第一信息,所述第一信息用于指示所述确定的关系。
  4. 如权利要求1-3任一所述的方法,其特征在于,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别和N个候选位置编号均相同。
  5. 如权利要求1-3任一所述的方法,其特征在于,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同;或者,
    在所述N个候选位置集合中,所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同;或者,
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同,且所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同。
  6. 如权利要求1-3任一所述方法,其特征在于,所述N份资源分别对应N个候选位置集合,N=2,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别为L1和L2,所述N份资源分别对应的N个候选位置编号为m1和m2,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    L1=L2,且m1=m2+△m1,△m1为第一偏移量且不等于0;或者,
    L1=L2+△L1,△L1为第二偏移量且不等于0,且m1=m2 mod M,其中,M为L1和L2所对应的候选位置数目中的较小值;或者,
    L1=L2+△L2,△L2为第三偏移量且不等于0,且m1=(m2+△m2)mod M,△m2为第四偏移量且不等于0,M为L1和L2所对应的候选位置数目中的较小值;
    其中,mod为取模运算符。
  7. 如权利要求1-6任一所述的方法,其特征在于,所述N份资源均位于同一个搜索空间,且所述N份资源分别具有不同的位置偏移量。
  8. 如权利要求1-7任一所述的方法,其特征在于,所述N份资源位于一个调度时间单元相同的时域位置,所述终端使用聚合级别集合的子集对所述下行控制信道进行盲检测。
  9. 如权利要求8所示的方法,其特征在于,所述方法还包括:
    所述终端接收所述基站发送的第二信息,所述第二信息用于指示所述聚合级别的子集。
  10. 一种发送控制信息的方法,其特征在于,所述方法包括:
    基站获取N份资源在下行控制信道中确定的关系,所述N份资源位于一个调度时间单元;
    所述基站根据所述确定的关系,向所述终端发送下行控制信息,所述下行控制信息中包括属于所述终端的下行控制信息,所述终端的下行控制信息承载于所述N份资源,N为≥2的整数。
  11. 如权利要求10所述的方法,其特征在于,所述N份资源中至少两份资源分别对应的天线端口之间是非准共址的。
  12. 如权利要求10或者11所述的方法,其特征在于,所述方法还包括:
    所述基站向所述终端发送第一信息,所述第一信息用于指示所述确定的关系。
  13. 如权利要求10-12任一所述的方法,其特征在于,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别和N个候选位置编号均相同
  14. 如权利要求10-12任一所述的方法,其特征在于,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同;或者,
    在所述N个候选位置集合中,所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同;或者,
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同,且所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同。
  15. 如权利要求10-12任一所述方法,其特征在于,所述N份资源分别对应N个候选位置集合,N=2,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别为L1和L2,所述N份资源分别对应的N个候选位置编号 为m1和m2,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    L1=L2,且m1=m2+△m1,△m1为第一偏移量且不等于0;或者,
    L1=L2+△L1,△L1为第二偏移量且不等于0,且m1=m2 mod M,其中,M为L1和L2所对应的候选位置数目中的较小值;或者,
    L1=L2+△L2,△L2为第三偏移量且不等于0,且m1=(m2+△m2)mod M,△m2为第四偏移量且不等于0,M为L1和L2所对应的候选位置数目中的较小值;
    其中,mod为取模运算符。
  16. 如权利要求10-15任一所述的方法,其特征在于,所述N份资源均位于同一个搜索空间,且所述N份资源分别具有不同的位置偏移量。
  17. 如权利要求16所述的方法,其特征在于,所述基站向所述终端发送第二信息,所述第二信息用于指示所述偏移量。
  18. 如权利要求10-17任一所述的方法,其特征在于,所述N份资源位于一个调度时间单元相同的时域位置;
    所述基站向所述终端发送第三信息,所述第三信息用于指示所述聚合级别的子集,所述所述聚合级别的子集为所述终端对所述下行控制信道进行盲检测时所使用。
  19. 一种通信设备,其特征在于,包括:
    收发器,用于接收基站发送的下行控制信息,所述下行控制信息中包括属于所述通信设备的下行控制信息,其中,所述通信设备的下行控制信息承载于N份资源,所述N份资源位于一个调度时间单元的下行控制信道中,N为≥2的整数;
    处理器,用于监听所述下行控制信道,并获取所述通信设备的下行控制信息;其中,所述N份资源在所述下行控制信道中具有确定的关系。
  20. 如权利要求19所述的通信设备,其特征在于,所述N份资源中至少两份资源分别对应的天线端口之间是非准共址的。
  21. 如权利要求19或者20所述的通信设备,其特征在于,
    所述收发器还用于,接收所述基站发送的第一信息,所述第一信息用于指示所述确定的关系。
  22. 如权利要求19-21任一所述的通信设备,其特征在于,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别和N个候选位置编号均相同。
  23. 如权利要求19-21任一所述的通信设备,其特征在于,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在 至少两个聚合级别不相同;或者,
    在所述N个候选位置集合中,所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同;或者,
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同,且所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同。
  24. 如权利要求19-21任一所述的通信设备,其特征在于,所述N份资源分别对应N个候选位置集合,N=2,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别为L1和L2,所述N份资源分别对应的N个候选位置编号为m1和m2,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    L1=L2,且m1=m2+△m1,△m1为第一偏移量且不等于0;或者,
    L1=L2+△L1,△L1为第二偏移量且不等于0,且m1=m2 mod M,其中,M为L1和L2所对应的候选位置数目中的较小值;或者,
    L1=L2+△L2,△L2为第三偏移量且不等于0,且m1=(m2+△m2)mod M,△m2为第四偏移量且不等于0,M为L1和L2所对应的候选位置数目中的较小值;
    其中,mod为取模运算符。
  25. 如权利要求19-24任一所述的通信设备,其特征在于,所述N份资源均位于同一个搜索空间,且所述N份资源分别具有不同的位置偏移量。
  26. 如权利要求19-25任一所述的通信设备,其特征在于,所述N份资源位于一个调度时间单元相同的时域位置,所述处理器还用于,使用聚合级别集合的子集对所述下行控制信道进行盲检测。
  27. 如权利要求26所述的通信设备,其特征在于,
    所述收发器还用于,接收所述基站发送的第二信息,所述第二信息用于指示所述聚合级别的子集。
  28. 一种基站,其特征在于,包括:
    处理器,用于获取N份资源在下行控制信道中确定的关系,所述N份资源位于一个调度时间单元;
    收发器,用于根据所述确定的关系,向所述终端发送下行控制信息,所述下行控制信息中包括属于所述终端的下行控制信息,所述终端的下行控制信息承载于所述N份资源,N为≥2的整数。
  29. 如权利要求28所述的基站,其特征在于,所述N份资源中至少两份资源分别对应的天线端口之间是非准共址的。
  30. 如权利要求28所述的基站,其特征在于,
    所述收发器还用于,向所述终端发送第一信息,所述第一信息用于指示所述确定的关系。
  31. 如权利要求28-30任一所述的基站,其特征在于,所述N份资源分别 对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别和N个候选位置编号均相同
  32. 如权利要求28-30任一所述的基站,其特征在于,所述N份资源分别对应N个候选位置集合,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同;或者,
    在所述N个候选位置集合中,所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同;或者,
    在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别存在至少两个聚合级别不相同,且所述N份资源分别对应的N个候选位置编号存在至少两个候选位置编号不相同。
  33. 如权利要求28-30任一所述的基站,其特征在于,所述N份资源分别对应N个候选位置集合,N=2,在所述N个候选位置集合中,所述N份资源分别对应的N个聚合级别为L1和L2,所述N份资源分别对应的N个候选位置编号为m1和m2,所述N份资源在所述下行控制信道中具有确定的关系,包括:
    L1=L2,且m1=m2+△m1,△m1为第一偏移量且不等于0;或者,
    L1=L2+△L1,△L1为第二偏移量且不等于0,且m1=m2 mod M,其中,M为L1和L2所对应的候选位置数目中的较小值;或者,
    L1=L2+△L2,△L2为第三偏移量且不等于0,且m1=(m2+△m2)mod M,△m2为第四偏移量且不等于0,M为L1和L2所对应的候选位置数目中的较小值;
    其中,mod为取模运算符。
  34. 如权利要求28-33任一所述的基站,其特征在于,所述N份资源均位于同一个搜索空间,且所述N份资源分别具有不同的位置偏移量。
  35. 如权利要求34所述的基站,其特征在于,
    所述收发器还用于向所述终端发送第二信息,所述第二信息用于指示所述偏移量。
  36. 如权利要求28-35任一所述的基站,其特征在于,所述N份资源位于一个调度时间单元相同的时域位置;
    所述收发器还用于,所述终端发送第三信息,所述第三信息用于指示所述聚合级别的子集,所述所述聚合级别的子集为所述终端对所述下行控制信道进行盲检测时所使用。
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