WO2017066967A1 - 一种发送下行控制信息dci的方法及装置 - Google Patents

一种发送下行控制信息dci的方法及装置 Download PDF

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Publication number
WO2017066967A1
WO2017066967A1 PCT/CN2015/092580 CN2015092580W WO2017066967A1 WO 2017066967 A1 WO2017066967 A1 WO 2017066967A1 CN 2015092580 W CN2015092580 W CN 2015092580W WO 2017066967 A1 WO2017066967 A1 WO 2017066967A1
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WIPO (PCT)
Prior art keywords
channel resource
time unit
equal
resource
time
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PCT/CN2015/092580
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English (en)
French (fr)
Inventor
李超君
马莎
吕永霞
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华为技术有限公司
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Priority to KR1020187014378A priority Critical patent/KR102074437B1/ko
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202010428997.6A priority patent/CN111800246B/zh
Priority to EP22196798.7A priority patent/EP4171152A1/en
Priority to CN201910664805.9A priority patent/CN110365462B/zh
Priority to EP15906485.6A priority patent/EP3361686B1/en
Priority to CN201910665349.XA priority patent/CN110418414B/zh
Priority to CN201580072394.4A priority patent/CN107113276B/zh
Priority to CN202010428982.XA priority patent/CN111800245B/zh
Priority to PCT/CN2015/092580 priority patent/WO2017066967A1/zh
Priority to KR1020207003095A priority patent/KR102248027B1/ko
Publication of WO2017066967A1 publication Critical patent/WO2017066967A1/zh
Priority to US15/959,279 priority patent/US10973012B2/en
Priority to US17/220,753 priority patent/US11497013B2/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • 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
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072Error control for data other than payload data, e.g. control data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting DCI (Downlink Control Information).
  • DCI Downlink Control Information
  • the terminal device In the LTE (Long Term Evolution) system, the terminal device needs to know scheduling information configured by the base station to the terminal device, such as time-frequency resource allocation, modulation and coding, and the like, before receiving the downlink data or transmitting the uplink data.
  • the power control command information related to the uplink transmission of the terminal device needs to be notified.
  • These scheduling information and power control command information belong to DCI.
  • the base station mainly carries the DCI through a PDCCH (Physical Downlink Control Channel).
  • the current TTI (Transmission Time Interval) is the duration of one subframe, that is, 1 ms. As the technology evolves, in order to reduce the delay, the TTI duration needs to be reduced. This puts new demands on the current data transmission mechanism. .
  • the currently defined PDCCH for example, the PDCCH defined by the version (Rel)-8 and the ePDCCH (Enhanced PDCCH) defined by the Rel-11 are used for scheduling data packets with a TTI duration of 1 ms, and data for a TTI duration of less than 1 ms.
  • the scheduling delay is long.
  • the PDCCH region is located in the first two symbols in one subframe.
  • the base station needs to schedule a data packet in the sixth symbol in one subframe, the PDCCH defined for Rel-8 cannot be in the current subframe.
  • the data packet is scheduled immediately, and it needs to be delayed by 8 symbols, that is, the data packet can be scheduled in the next subframe. Therefore, for a packet whose TTI is less than 1 ms, there is a defect that the scheduling delay is long.
  • the embodiment of the invention provides a method for transmitting a downlink DCI, which is used to solve the defect that the scheduling delay is long in the prior art.
  • a method for transmitting downlink control information DCI including:
  • a first base channel resource the channel resource in a first subframe i-th time units in the time domain, one subframe includes N T time units, the N T is greater than or equal to 2 integer, i is a positive integer less than or equal to the N T;
  • the base station sends downlink control information DCI to the terminal device on the first channel resource.
  • the N T is at least one of 2, 4, 6, 7, 12, and 14.
  • the two time units included in the one subframe respectively a first time unit and a second time unit, the first time unit is located in a first slot of the one subframe, and the second time unit is located in a second slot of the one subframe;
  • the four time units included in the one subframe are a first time unit, a second time unit, a third time unit, and a fourth time unit, where the first time unit is located at the a symbol set ⁇ #0, #1, #2, #3 ⁇ , the second time unit is located in the second symbol set ⁇ #4, #5, #6 ⁇ , and the third time unit is located in the third symbol set ⁇ #7, #8, #9, #10 ⁇ , the fourth time unit is located in the fourth symbol set ⁇ #11, #12, #13 ⁇ .
  • the method before the determining, by the base station, the first channel resource, the method further includes:
  • the base station Determining, by the base station, that the aggregation level AL is L in a time period of T, and the L is a positive integer;
  • the base station determines that AL is L, and sends signaling to the terminal device, where the signaling is used to indicate that the AL of the first channel resource is the L, and the L is a positive integer.
  • the determining, by the base station, the first channel resource includes:
  • the base station determines M candidate channel resources, and the AL of each candidate channel resource of the M candidate channel resources is L, and the M is a positive integer;
  • the base station selects one candidate channel resource from the M candidate channel resources as the first channel resource.
  • the base station selects one candidate channel resource from the M candidate channel resources as the first channel resource, including :
  • the base station selects one candidate channel resource from the M candidate channel resources as the first channel resource according to the terminal device identifier.
  • a sixth possible implementation if the N T is equal to 2, and the L is equal to 1 or 2, the M is equal to 3 ;
  • N T is equal to 4, 6, 7, 12 or 14, and the L is equal to 1 or 2, then the M is equal to 1 or 2;
  • the M is equal to 1.
  • the DCI includes information for indicating a transmission resource
  • the method further includes:
  • the base station performs data transmission with the terminal device on the transmission resource.
  • the transmission resource cannot be used to carry DCI of other terminal devices.
  • the ith time unit includes at least one data symbol, the first channel The data symbol in the ith time unit of the resource in the time domain.
  • the first when the ith symbol is included in the i th time unit, the first a channel resource located in the ith symbol in the i th time unit in a time domain;
  • the first channel resource is located in a data symbol in the i th time unit in a time domain.
  • the first channel resource when the first channel resource is located in the ith time unit in the time domain
  • the first channel resource includes X RUs, and any one of the X RUs occupies 1 symbol in the time domain, and occupies in the frequency domain.
  • the first channel resource is located in the ith time unit in the time domain.
  • the first data symbol in the frequency domain occupies the X RUs, where Y is the number of RUs occupied by the available bandwidth in the frequency domain;
  • the first channel resource is located in the first N data symbols in the i th time unit in the time domain, and the first channel resource is used for each data symbol of the N data symbols. Occupying the frequency domain RU, the N is less than or equal to the total number of data symbols included in the ith time unit;
  • the first channel resource is located in the first N data symbols in the ith time unit in the time domain, and for the first N-1 data symbols in the N data symbols, The first channel resource occupies W RUs in the frequency domain, and the first channel resource occupies XW*(N-1) RUs in the frequency domain for the Nth data symbol of the N data symbols.
  • the N is less than or equal to the total number of data symbols included in the ith time unit, and the W is less than or equal to the Y, and XW*(N-1) is less than or equal to the Y.
  • the first channel resource when the first channel resource is located in the ith When the data symbols in the time unit are, the first channel resource is a centralized channel resource, or a distributed channel resource.
  • the DCI includes information for indicating a transmission resource
  • the transmission resource occupies at least one centralized enhanced resource block group LELBG in the frequency domain;
  • the transmission resource occupies at least one distributed enhanced resource block group DERBG in the frequency domain.
  • the first channel resource is one PDCCH in the first control region, and the first control region is located in the first N sym1 symbols in the first slot;
  • the first channel resource is one PDCCH in the second control region, and the second control region is located in the second The first N sym2 symbols in the slot;
  • the N sym1 is 1, 2, 3 or 4, and N sym2 is a positive integer.
  • the frequency domain resource occupied by the second control area is less than or equal to the frequency domain resource occupied by the first control area.
  • the method before the determining, by the base station, the first channel resource, the method further includes:
  • the signaling is a control format indication CFI carried by the physical control format indication channel PCFICH on the first slot, or a CFI carried by the PCFICH on the second slot, or a high layer signaling.
  • a method for receiving downlink control information DCI including:
  • the channel resource in a first subframe i-th time units in the time domain one subframe includes N T time units, the N T is greater than or equal 2 is an integer, i is a positive integer less than or equal to the N T;
  • the terminal device interprets downlink control information DCI sent by the base station, where the DCI is carried in the first channel resource.
  • the N T is at least one of 2, 4, 6, 7, 12, and 14.
  • the two time units included in the one subframe respectively a first time unit and a second time unit
  • the first time unit is located in a first slot of the one subframe
  • the second time unit is located in a second slot of the one subframe
  • the four time units included in the one subframe are a first time unit, a second time unit, a third time unit, and a fourth time unit, where the first time unit is located at the a symbol set ⁇ #0, #1, #2, #3 ⁇ , the second time unit is located in the second symbol set ⁇ #4, #5, #6 ⁇ , and the third time unit is located in the third symbol set ⁇ #7, #8, #9, #10 ⁇ , the fourth time unit is located in the fourth symbol set ⁇ #11, #12, #13 ⁇ .
  • the method before the detecting, by the terminal device, the first channel resource, the method further includes:
  • the terminal device determines that the aggregation level AL is L in a time period of T, and the L is a positive integer; or
  • the terminal device receives the signaling sent by the base station, and determines that AL is L according to the signaling, where the signaling is used to indicate that the AL of the first channel resource is the L, and the L is a positive integer. .
  • the detecting, by the terminal device, the first channel resource includes:
  • the terminal device determines M candidate channel resources, and the AL of each candidate channel resource of the M candidate channel resources is L, and the M is a positive integer;
  • the terminal device detects, from the M candidate channel resources, a candidate channel resource as the first channel resource.
  • the terminal device detects a candidate channel from the M candidate channel resources
  • the resource is the first channel resource, including:
  • the terminal device detects one from the M candidate channel resources according to the terminal device identifier.
  • the candidate channel resources are used as the first channel resource.
  • a sixth possible implementation if the N T is equal to 2, and the L is equal to 1 or 2, the M is equal to 3 ;
  • N T is equal to 4, 6, 7, 12 or 14, and the L is equal to 1 or 2, then the M is equal to 1 or 2;
  • the M is equal to 1.
  • the DCI includes information for indicating a transmission resource
  • the terminal device interprets the DCI sent by the base station, the terminal device further includes:
  • the terminal device performs data transmission with the base station on the transmission resource.
  • the transmission resource cannot be used to carry DCI of other terminal devices.
  • the ith time unit includes at least one data symbol, the first channel The data symbol in the ith time unit of the resource in the time domain.
  • the first channel resource is located in a data symbol in the i th time unit in a time domain.
  • the first channel resource when the first channel resource is located in the ith time unit in the time domain
  • the first channel resource includes X RUs, and any one of the X RUs occupies 1 symbol in the time domain, and occupies in the frequency domain.
  • the first channel resource is located in the ith time unit in the time domain.
  • the first data symbol in the frequency domain occupies the X RUs, where Y is the number of RUs occupied by the available bandwidth in the frequency domain;
  • the first channel resource is located in the first N data symbols in the i th time unit in the time domain, and the first channel resource is used for each data symbol of the N data symbols. Occupying the frequency domain RU, the N is less than or equal to the total number of data symbols included in the ith time unit;
  • the first channel resource is located in the first N data symbols in the ith time unit in the time domain, and for the first N-1 data symbols in the N data symbols, The first channel resource occupies W RUs in the frequency domain, and the first channel resource occupies XW*(N-1) RUs in the frequency domain for the Nth data symbol of the N data symbols.
  • the N is less than or equal to the total number of data symbols included in the ith time unit, and the W is less than or equal to the Y, and XW*(N-1) is less than or equal to the Y.
  • the first channel resource when the first channel resource is located in the ith When the data symbols in the time unit are, the first channel resource is a centralized channel resource, or a distributed channel resource.
  • the DCI includes information for indicating a transmission resource
  • the transmission resource occupies at least one centralized enhanced resource block group LELBG in the frequency domain;
  • the transmission resource occupies at least one distributed enhanced resource block group DERBG in the frequency domain.
  • the first channel resource is one PDCCH in the first control region, and the first control region is located in the first N sym1 symbols in the first slot;
  • the first channel resource is one PDCCH in the second control region, and the second control region is located in the second The first N sym2 symbols in the slot;
  • the N sym1 is 1, 2, 3 or 4, and N sym2 is a positive integer.
  • the frequency domain resource occupied by the second control area is less than or equal to the frequency domain resource occupied by the first control area.
  • the method before the detecting, by the terminal device, the first channel resource, the method further includes:
  • the signaling is a control format indication CFI carried by the physical control format indication channel PCFICH on the first slot, or a CFI carried by the PCFICH on the second slot, or a high layer signaling.
  • a base station including:
  • a processing unit for determining a first channel resource, when in said one subframe i-th time domain a first channel unit resource, the one subframe comprising N T time units, is the N T integer greater than or equal to 2, the i is smaller than or equal to the positive integer N in T;
  • a sending unit configured to send downlink control information DCI to the terminal device on the first channel resource.
  • the N T is at least one of 2, 4, 6, 7, 12, and 14.
  • the 36 time units included in the one subframe respectively a first time unit and a second time unit, the first time unit is located in a first slot of the one subframe, and the second time unit is located in a second slot of the one subframe;
  • the four time units included in the one subframe are a first time unit, a second time unit, a third time unit, and a fourth time unit, where the first time unit is located at the a symbol set ⁇ #0, #1, #2, #3 ⁇ , the second time unit is located in the second symbol set ⁇ #4, #5, #6 ⁇ , and the third time unit is located in the third symbol set ⁇ #7, #8, #9, #10 ⁇ , the fourth time unit is located in the fourth symbol set ⁇ #11, #12, #13 ⁇ .
  • the processing unit is further configured to determine, when the aggregation level AL is at a time T If the L is a positive integer, the L is a positive integer; or the AL is determined to be L, and the signaling is sent to the terminal device, where the signaling is used to indicate that the AL of the first channel resource is the L, L is a positive integer.
  • the processing unit determines the first channel resource, specifically:
  • each of the M candidate channel resources has an L of L, and the M is a positive integer
  • the processing unit when selecting one candidate channel resource from the M candidate channel resources, is used as the first channel resource , Specifically:
  • a sixth possible implementation if the N T is equal to 2, and the L is equal to 1 or 2, the M is equal to 3 ;
  • N T is equal to 4, 6, 7, 12 or 14, and the L is equal to 1 or 2, then the M is equal to 1 or 2;
  • the M is equal to 1.
  • the DCI includes information for indicating a transmission resource
  • the sending unit is further configured to perform data transmission with the terminal device on the transmission resource.
  • the transmission resource cannot be used to carry DCI of other terminal devices.
  • the ith time unit includes at least one data symbol, the first channel The data symbol in the ith time unit of the resource in the time domain.
  • the first when the ith symbol is included in the i th time unit, the first a channel resource located in the ith symbol in the i th time unit in a time domain;
  • the first channel resource is located in a data symbol in the i th time unit in a time domain.
  • the eleventh possible implementation manner when the first channel resource is located in the ith time unit in the time domain In the case of a symbol, the first channel resource includes X RUs, and any one of the X RUs occupies 1 symbol in the time domain, and occupies in the frequency domain. Subcarriers, where X is a positive integer.
  • the first channel resource is located in the ith time unit in the time domain.
  • the first data symbol in the frequency domain occupies the X RUs, where Y is the number of RUs occupied by the available bandwidth in the frequency domain;
  • the first channel resource is located in the first N data symbols in the i th time unit in the time domain, and the first channel resource is used for each data symbol of the N data symbols. Occupying the frequency domain RU, the N is less than or equal to the total number of data symbols included in the ith time unit;
  • the first channel resource is located in the first N data symbols in the ith time unit in the time domain, and for the first N-1 data symbols in the N data symbols, The first channel resource occupies W RUs in the frequency domain, and the first channel resource occupies XW*(N-1) RUs in the frequency domain for the Nth data symbol of the N data symbols.
  • the N is less than or equal to the total number of data symbols included in the ith time unit, and the W is less than or equal to the Y, and XW*(N-1) is less than or equal to the Y.
  • the first channel resource when the first channel resource is located in the ith When the data symbols in the time unit are, the first channel resource is a centralized channel resource, or a distributed channel resource.
  • the DCI includes information for indicating a transmission resource
  • the transmission resource occupies at least one centralized enhanced resource block group LELBG in the frequency domain;
  • the transmission resource occupies at least one distributed enhanced resource block group DERBG in the frequency domain.
  • the first channel resource is one PDCCH in the second control region, and the second control region is located in the second The first N sym2 symbols in the slot;
  • the N sym1 is 1, 2, 3 or 4, and N sym2 is a positive integer.
  • the frequency domain resource occupied by the second control area is less than or equal to the frequency domain resource occupied by the first control area.
  • the sending unit is further configured to: send, to the terminal device, signaling that indicates the value of the N sym2 ;
  • the signaling is a control format indication CFI carried by the physical control format indication channel PCFICH on the first slot, or a CFI carried by the PCFICH on the second slot, or a high layer signaling.
  • a fourth aspect provides a terminal device, including:
  • a sending unit configured to decode downlink control information DCI sent by the base station, where the DCI is carried in the first channel resource.
  • the N T is at least one of 2, 4, 6, 7, 12, and 14.
  • the two time units included in the one subframe respectively a first time unit and a second time unit, the first time unit is located in a first slot of the one subframe, and the second time unit is located in a second slot of the one subframe;
  • the four time units included in the one subframe are a first time unit, a second time unit, a third time unit, and a fourth time unit, where the first time unit is located at the a symbol set ⁇ #0, #1, #2, #3 ⁇ , the second time unit is located in the second symbol set ⁇ #4, #5, #6 ⁇ , and the third time unit is located in the third symbol set ⁇ #7, #8, #9, #10 ⁇ , the fourth time unit is located in the fourth symbol set ⁇ #11, #12, #13 ⁇ .
  • the processing unit is further configured to determine, when the aggregation level AL is at a time T Inside is L, the L is a positive integer; or,
  • a receiving unit configured to receive signaling sent by the base station
  • the processing unit is further configured to determine, according to the signaling received by the receiving unit, that the AL is L, The signaling is used to indicate that the AL of the first channel resource is the L, and the L is a positive integer.
  • the processing unit when the processing unit detects the first channel resource, specifically:
  • each of the M candidate channel resources has an L of L, and the M is a positive integer
  • One candidate channel resource is detected as the first channel resource from the M candidate channel resources.
  • the processing unit detects a candidate channel from the M candidate channel resources When the resource is the first channel resource, specifically:
  • the M is equal to 3;
  • N T is equal to 4, 6, 7, 12 or 14, and the L is equal to 1 or 2, then the M is equal to 1 or 2;
  • the M is equal to 1.
  • the DCI includes information for indicating a transmission resource
  • the sending unit is further configured to perform data transmission with the base station on the transmission resource.
  • the transmission resource cannot be used to carry DCI of other terminal devices.
  • the ith time unit includes at least one data symbol, where A channel symbol is a data symbol located in the i-th time unit in the time domain.
  • the first channel resource is located in a data symbol in the i th time unit in a time domain.
  • the first channel resource when the first channel resource is located in the ith time unit in the time domain
  • the first channel resource includes X RUs, and any one of the X RUs occupies 1 symbol in the time domain, and occupies in the frequency domain.
  • the first channel resource is located in the ith time unit in a time domain.
  • the first data symbol in the frequency domain occupies the X RUs, where Y is the number of RUs occupied by the available bandwidth in the frequency domain;
  • the first channel resource is located in the first N data symbols in the i th time unit in the time domain, and the first channel resource is used for each data symbol of the N data symbols. Occupying the frequency domain RU, the N is less than or equal to the total number of data symbols included in the ith time unit;
  • the first channel resource is located in the first N data symbols in the ith time unit in the time domain, and for the first N-1 data symbols in the N data symbols, The first channel resource occupies W RUs in the frequency domain, and the first channel resource occupies XW*(N-1) RUs in the frequency domain for the Nth data symbol of the N data symbols.
  • the N is less than or equal to the total number of data symbols included in the ith time unit, and the W is less than or equal to the Y, and XW*(N-1) is less than or equal to the Y.
  • the first channel resource when the first channel resource is located in the ith Time When the data symbol is in the unit, the first channel resource is a centralized channel resource or a distributed channel resource.
  • the DCI includes information for indicating a transmission resource
  • the transmission resource occupies at least one centralized enhanced resource block group LELBG in the frequency domain;
  • the transmission resource occupies at least one distributed enhanced resource block group DERBG in the frequency domain.
  • the first channel resource is one PDCCH in the first control region, and the first control region is located in the first N sym1 symbols in the first slot;
  • the first channel resource is one PDCCH in the second control region, and the second control region is located in the second The first N sym2 symbols in the slot;
  • the N sym1 is 1, 2, 3 or 4, and N sym2 is a positive integer.
  • the frequency domain resource occupied by the second control area is less than or equal to the frequency domain resource occupied by the first control area.
  • the method further includes: a receiving unit, configured to receive, by the base station, signaling used to indicate the value of the N sym2 ;
  • the signaling is a control format indication CFI carried by the physical control format indication channel PCFICH on the first slot, or a CFI carried by the PCFICH on the second slot, or a high layer signaling.
  • Embodiments of the present invention a method of transmitting downlink DCI: determining a first base channel resources, channel resource in a first subframe i-th time units in the time domain, one subframe includes N T time Unit, N T is an integer greater than or equal to 2, i is a positive integer less than or equal to N T ; the base station sends DCI to the terminal device on the first channel resource, in which the first channel resource carrying the DCI is in time
  • the i-th time unit in a sub-frame on the domain, i is a positive integer less than or equal to N T , that is, each time unit in the sub-frame has a first channel resource, so no matter which one The data needs to be transmitted on the time unit, and can be transmitted immediately without waiting for the next subframe transmission, thus reducing the scheduling delay.
  • one subframe includes 7 time units, one time unit includes 2 symbols, the 6th symbol needs to transmit data, the 6th symbol is located in the 3rd time unit, and the first channel is present on the 3rd time unit. Therefore, in the sixth symbol, the scheduling of the uplink data transmission can be performed, and the terminal device sends the uplink data, and does not need to wait until the next subframe performs the scheduling of the uplink data transmission. Therefore, the scheduling delay in the prior art is solved. Longer defects.
  • 2A is a flowchart of sending a downlink DCI according to an embodiment of the present invention
  • 2B is a schematic diagram of a subframe including two time units according to an embodiment of the present invention.
  • 2C is a schematic diagram of a subframe including four time units according to an embodiment of the present invention.
  • 2D is a schematic diagram of LELBG and DERBG according to an embodiment of the present invention.
  • FIG. 3 is another flowchart of sending a downlink DCI according to an embodiment of the present invention.
  • FIG. 4A is a schematic diagram of a base station according to an embodiment of the present invention.
  • FIG. 4B is another schematic diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 5B is another schematic diagram of a terminal device according to an embodiment of the present invention.
  • a radio frame in the embodiment of the present invention includes 10 subframes, each subframe has a length of 1 millisecond (ms), and each subframe includes two slots, and each slot is 0.5ms.
  • each slot The number of symbols included in each slot is related to the length of CP (Cyclic Prefix) in the subframe. If the CP is Normal (normal) CP, each slot includes 7 symbols; if the CP is Extended (long) CP, each slot consists of 6 symbols.
  • CP Cyclic Prefix
  • each subframe when Normal CP is set in front of the subframe, each subframe consists of 14 symbols, that is, each subframe has a sequence number of #0, #1, #2, #3, #4, #5,# 6, #7, #8, #9, #10, #11, #12, #13 symbol composition; when the extended CP is set in front of the subframe, each subframe consists of 12 symbols, that is, each subframe consists of
  • the serial numbers are symbolic components of #0, #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11, respectively.
  • the symbols included in each slot may have an uplink symbol or a downlink symbol.
  • the uplink symbol is called a SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbol, and the downlink symbol is called OFDM. (Orthogonal Frequency Division Multiplexing) symbol. It should be noted that if the subsequent technology introduces an uplink multiple access method of OFDMA (Orthogonal Frequency Division Multiple Access), the uplink symbol may also be referred to as an OFDM symbol.
  • the form of the uplink symbol and the downlink symbol is not specifically limited in the embodiment of the present invention.
  • the PDCCH mentioned in the embodiment of the present invention may be a PDCCH defined by a version (Rel)-8, an ePDCCH defined by Rel-11, and a PDCCH of a future evolution.
  • the channel carrying DCI is not limited to PDCCH, as long as it can be used. It is sufficient to send DCI to the terminal device.
  • the search space is composed of one or more PDCCHs, and each PDCCH is a candidate PDCCH (PDCCH candidate), which can be used to carry DCI.
  • the search space is a collection of candidate PDCCHs.
  • the terminal device needs to listen to each candidate PDCCH, so the search space is also the PDCCH set monitored by the terminal device.
  • a search space composed of PDCCHs defined by Rel-8 is referred to as a PDCCH search space
  • a search space composed of ePDCCHs defined by Rel-11 is referred to as an ePDCCH search space.
  • the search space includes two types: CSS (Common Search Space) and UESS (UE Specific Search Space).
  • the CSS is a search space that multiple terminal devices in the cell have to listen to
  • the UESS is a search space that needs to be monitored by a specific terminal device in the cell.
  • the PDCCH UESS is a UESS composed of a PDCCH defined by Rel-8
  • the ePDCCH UESS is a UESS composed of an ePDCCH defined by Rel-11.
  • the PDCCH for transmitting the scheduling information in the embodiment of the present invention is formed by aggregating L CCEs (Control Channel Element), and L is a positive integer, and is called an Ag (Aggregation Level).
  • L can be 1, 2, 4 or 8.
  • L can be 1, 2, 4, 8, 16, or 32.
  • the first channel resource for carrying the DCI on the data symbol is formed by aggregating L DsCCEs (Data-symbol Control Information Element), and L is a positive integer, which is called AL.
  • L DsCCEs Data-symbol Control Information Element
  • the data transmission mode in the embodiment of the present invention includes a data transmission mode using a normal TTI and a data transmission mode using a short TTI.
  • the terminal device may send signaling indicating a data transmission mode, where the signaling is high layer signaling or physical layer signaling.
  • the terminal device determines the data transmission mode after receiving the signaling.
  • the normal TTI means that the length of the TTI is 1 subframe or 1 ms.
  • the data packet transmitted by the normal TTI is called a "normal TTI data packet".
  • the time domain resource occupied by the normal TTI data packet may not be Is a complete 1 subframe or 1ms.
  • the first 1, 2, 3 or 4 symbols in one downlink subframe may be used to transmit the PDCCH. Therefore, the time domain resource occupied by the downlink normal TTI data packet may not be a complete subframe.
  • the last symbol in an uplink subframe may be used to transmit a SRS (Sounding Reference Signal). Therefore, the time domain resource occupied by the uplink normal TTI packet may not be a complete subframe.
  • SRS Sounding Reference Signal
  • the short TTI means that the length of the TTI is less than 1 subframe or 1 ms, and the data packet transmitted by using the short TTI is called a "short TTI data packet".
  • a process for sending a downlink DCI is as follows:
  • Step 200 the base station determining a first channel resource, a first channel resource in a subframe i-th time units in the time domain, one subframe includes N T time units, N T is the integer greater than or equal to 2, i is a positive integer less than or equal to N T ;
  • Step 210 The base station sends the DCI to the terminal device on the first channel resource.
  • step 200 may also be described as follows:
  • the base station determines the first channel resource, where the first channel resource is located in the i-th time unit within 1 ms in the time domain, and includes N T time units in 1 ms, and N T is an integer greater than or equal to 2, and i is less than or equal to N. A positive integer of T.
  • N T is at least one of 2, 4, 6, 7, 12, and 14.
  • N T is 2, 4, 7, or 14; for a long CP, N T is 2, 4, 6, or 12.
  • time length of one subframe or 1 ms may be equal to the sum of time lengths of NT time units, or the time length of one subframe or 1 ms may be greater than the sum of time lengths of NT time units.
  • the two time units included in one subframe are the first time unit and the second time unit, respectively, and the first time unit is located in one subframe.
  • a slot the second time unit is located in the second slot in one subframe, as shown in FIG. 2B;
  • the four time units included in one subframe are a first time unit, a second time unit, a third time unit, and a fourth time unit, and the first time unit is located in the first symbol.
  • the second time unit is located in the second symbol set ⁇ #4, #5, #6 ⁇
  • the third time unit is located in the third symbol set ⁇ #7, #8 , #9, #10 ⁇
  • the fourth time unit is located in the fourth symbol set ⁇ #11, #12, #13 ⁇ , as shown in FIG. 2C.
  • the first time unit is located in the first symbol set ⁇ #0, #1, #2 ⁇ ; the second time unit is located in the second symbol set ⁇ #3, #4, #5 , #6 ⁇ ; the third time unit is located in the third symbol set ⁇ #7, #8, #9 ⁇ , and the fourth time unit is located in the fourth symbol set ⁇ #10, #11, #12, #13 ⁇ .
  • the aggregation level AL needs to be determined.
  • the aggregation level is a positive integer, for example, a value of 1, 2, 4, 8, 16, or 32.
  • the base station may determine an aggregation level of the first channel resource as follows:
  • the base station can determine the AL according to the channel state of the terminal device.
  • the base station may determine the AL according to the CSI (Channel State Information) of the terminal device.
  • CSI Channel State Information
  • the base station determines that the aggregation level AL is L in a time period of T, and L is a positive integer. Accordingly, the terminal device can determine that the AL is L for a time period of time T. Since the aggregation level remains unchanged for a period of time, the terminal device once detects that the DCI is once in T, and knows that the AL of the channel resource carrying the DCI is L, and then only needs to blindly detect that the AL is the candidate channel resource corresponding to L. In addition, the DCI is determined, and the number of blind detections of the DCI is reduced, thereby improving the processing speed of the terminal and reducing the power consumption of the terminal.
  • the terminal device detects the DCI transmitted by the base station for the first time, since the AL is not known, it is necessary to detect all the candidate channel resources corresponding to the AL to determine the DCI. After the terminal device detects that the AL is the first time, the terminal device learns that the AL is L, and after 3 times, the terminal device only needs to detect the candidate channel resource corresponding to the L as L to determine the DCI.
  • the base station determines that the AL is L, and sends signaling to the terminal device, where the signaling may be used to indicate that the AL of the first channel resource is L, and L is a positive integer.
  • the terminal device does not need to blindly detect all candidate channel resources corresponding to the AL to acquire DCI, which reduces the processing complexity of the terminal device.
  • the method when the base station determines the first channel resource, the method may be as follows:
  • the base station determines M candidate channel resources, and the AL of each candidate channel resource of the M candidate channel resources is L, and M is a positive integer;
  • the base station selects one candidate channel resource from the M candidate channel resources as the first channel resource.
  • the base station determines three candidate channel resources, and the AL of each of the three candidate channel resources is L, the base station selects one candidate channel resource from the three candidate channel resources, and selects the candidate.
  • the channel resource serves as the first channel resource.
  • the method when the base station selects one candidate channel resource from the M candidate channel resources, the method may be as follows:
  • the base station uses the detected first idle candidate channel resource as the first channel resource.
  • the base station selects one candidate channel resource from the M candidate channel resources as the first channel resource according to the terminal device identifier.
  • the UE ID may be a C-RNTI (Cell Radio Network Temporary Identifiers) or an SPS C-RNTI (Semi-Persistent Scheduling C-RNTI). -RNTI).
  • C-RNTI Cell Radio Network Temporary Identifiers
  • SPS C-RNTI Semi-Persistent Scheduling C-RNTI
  • F(n RNTI ) represents a function with n RNTI as a parameter, and n RNTI is a UE ID.
  • F(n RNTI ) n RNTI mod M.
  • the terminal device does not need to blindly detect M ALs as L candidate channel resources.
  • the value of M is related to the number of blind detections of the DCI of the terminal device. In order to maintain a reasonable number of blind detections, the value of M cannot be too large.
  • M can be related to the aggregation level. For example, when the aggregation level is 1 or 2, M is equal to 4; when the aggregation level is 4, M is equal to 2; when the aggregation level is 8, M is equal to 1. For another example, when the aggregation level is 1 or 2, M is equal to 2.
  • the candidate channel resources with the aggregation level of 1 or 2 may be respectively located in the upper and lower sidebands of the available bandwidth.
  • the aggregation level is 4 or 8, and M is equal to 1.
  • the candidate channel resources with the aggregation level of 4 or 8 are all located on the upper sideband of the available bandwidth, or both are located in the lower sideband.
  • the candidate channel resource with the aggregation level of 4 and the candidate channel resource with the aggregation level of 8 are respectively located in the upper and lower sidebands of the available bandwidth.
  • M may also be associated with the value of N T.
  • M is for one time unit, that is, there are M candidate channel resources with an aggregation level of L on one time unit. For example, if N T is equal to 2 and L is equal to 1 or 2, then M is equal to 3;
  • N T is equal to 2, and L is equal to 4 or 8, then M is equal to 1;
  • N T is equal to 4, 6, 7, 12 or 14, and L is equal to 1 or 2, then M is equal to 1 or 2;
  • N T is equal to 4, 6, 7, 12 or 14, and L is equal to 4 or 8, then M is equal to 1.
  • the DCI includes information for indicating a transmission resource. Further, after the base station sends the DCI to the terminal device on the first channel resource, the method further includes the following operations:
  • the base station performs data transmission with the terminal device on the transmission resource.
  • the transmission resource indicated by the DCI occupies one time unit in the time domain.
  • the data transmission resource indicated by the resource allocation information occupies a symbol other than the PDCCH symbol in the one time unit in the time domain.
  • the data transmission resource indicated by the resource allocation information occupies one slot, or 2/3/4 symbols, in the time domain.
  • the DCI can be used to schedule short TTI data transmissions.
  • the base station sends a downlink data packet to the terminal device on the transmission resource indicated by the DCI.
  • the time domain resource occupied by the transmission resource is located in the ith time unit, that is, the downlink data packet and the DCI are located in the same time unit.
  • the base station receives the uplink data packet sent by the terminal device on the transmission resource indicated by the DCI.
  • the time domain resource occupied by the transmission resource is located in the i+Kth time unit, that is, the time unit occupied by the uplink data packet is the Kth time unit after the i th time unit occupied by the DCI, where K is greater than or equal to 4 The integer.
  • the terminal device For the uplink data transmission, there is a case where the terminal device separately transmits the CSI on the PUSCH, that is, the terminal device does not transmit the transport block carrying the UL-SCH (Uplink Shared Channel) on the PUSCH, and only transmits the current PUSCH reporting mode.
  • CIF Control Information Feedback
  • the base station receives the CSI transmitted by the terminal device on the transmission resource indicated by the DCI.
  • the time domain resource occupied by the transmission resource is one time unit in one subframe, for example, the time domain resource occupied by the transmission resource is the i+Kth time unit.
  • the time domain resource occupied by the transmission resource is one subframe or 1 ms.
  • the time domain resource occupied by the transmission resource is one subframe occupied by the i+K time units or 1 ms; when (i+k) mod N T >1
  • the time domain resource occupied by the transmission resource is the first subframe or 1 ms after the i+Kth time unit.
  • N T is 4, K is 4, and DCI is located in the third time unit on subframe 0, then the time domain resource occupied by the transmission resource is subframe 2.
  • the DCI further includes at least one of uplink scheduling information, downlink scheduling information, and information for requesting aperiodic CSI reporting.
  • the uplink scheduling information or the downlink scheduling information includes at least one of information for indicating a transmission resource, an MCS (Modulation and Coding Scheme), a precoding, an antenna port, and a number of layers.
  • MCS Modulation and Coding Scheme
  • the uplink scheduling information may further include configuration information indicating an uplink reference signal, for example, the configuration information indicates a time domain resource, a frequency domain resource, or a code domain resource occupied by the uplink reference signal.
  • the downlink scheduling information may further include configuration information indicating a downlink reference signal, for example, the configuration information indicates a type of the downlink reference signal, or a time domain resource, a frequency domain resource, or a code domain resource occupied by the downlink reference signal.
  • the transmission resource indicated by the DCI cannot be used to carry DCI of other terminal devices. That is, the base station does not transmit the DCI of other terminal devices on the transmission resource. It should be noted that, if the first channel resource is located in the transmission resource indicated by the DCI, the transmission resource remaining after the first channel resource is removed from the transmission resource indicated by the DCI is not used to carry the DCI of other terminal devices. In this way, when receiving the downlink data, the terminal device knows that the DCI of other terminal devices does not appear on the data transmission resource allocated to itself.
  • the terminal device does not know whether the data transmission resources allocated to itself will have DCI of other terminal devices, so the base station needs to notify the terminal device by using additional DCI bits; or, the base station always reserves some possible bearers for other devices.
  • the transmission resources of the DCI of the terminal device these resources cannot be used for downlink data transmission, so the resource waste is increased.
  • the i-th time unit includes at least one data symbol
  • the first channel resource is located in the time domain in a data symbol in the i-th time unit.
  • the data symbol refers to a symbol other than the PDCCH symbol in the subframe, or a symbol whose sequence number is not the same as the sequence number of the PDCCH symbol in one subframe.
  • the PDCCH symbol defined by Rel-8 is a symbol for transmitting a PDCCH.
  • the PDCCH symbol is the first 2, 3, or 4 symbols of the one subframe, and the data symbol is the one sub-frame. Other symbols except the first 2, 3 or 4 symbols are removed from the frame; when the downlink system bandwidth is greater than 10 RBs, in one subframe, the PDCCH symbol is the first 1, 2 or 3 symbols of the one subframe, and the data The symbol is the other symbols except the first 1, 2 or 3 symbols in the one subframe.
  • the base station may notify the terminal device of the number of PDCCH symbols or the number of data symbols by using a CFI (Control Format Indicator) or a higher layer signaling carried by the PCFICH (Physical Control Format Indicator Channel).
  • CFI Control Format Indicator
  • PCFICH Physical Control Format Indicator Channel
  • the base station determines the first channel resource according to whether the PDCCH symbol is included in the i th time unit. Specifically, when the PDCCH symbol is included in the i th time unit, the first channel resource is located in the ith symbol of the ith time unit in the time domain; when the ith symbol is not included in the i th time unit, and at least one is included In the case of a data symbol, the first channel resource is located in the data symbol in the i-th time unit in the time domain.
  • the first channel resource when the first channel resource is located in the PDCCH symbol in the i th time unit in the time domain, the first channel resource is one candidate PDCCH in the UESS or CSS.
  • the CSS is composed of 16 CCEs, and the CSS includes four candidate PDCCHs with an aggregation level of 4.
  • the CSS includes two candidate PDCCHs with an aggregation level of 8.
  • the UESS of PDCCH UESS UESS comprising M 1 aggregation level candidate PDCCH 1 and M 2 contains the UESS aggregation level of a candidate PDCCH 2, M 4 comprising the UESS aggregation level of a candidate PDCCH 4,
  • the UESS contains M 8 candidate PDCCHs with an aggregation level of 8, wherein M 1 and M 2 are positive integers less than 6, and M 4 and M 8 are positive integers less than 2.
  • the first channel resource when the first channel resource is located in the data symbol in the i-th time unit in the time domain, the first channel resource includes X RUs (Resource Units), and X RUs. Any one of the RUs occupies 1 symbol in the time domain and occupies in the frequency domain Subcarriers, where X is a positive integer.
  • the first channel resource is located in the first data symbol in the i-th time unit in the time domain, and occupies X RUs in the frequency domain.
  • the solution is only applicable to the case where Y is greater than or equal to X, where Y is the number of RUs occupied by the available bandwidth in the frequency domain.
  • X is 6, and on the first data symbol in the i-th time unit, the first channel resource occupies 6 RUs in the frequency domain of the available bandwidth.
  • the first channel resource is located in the first N data symbols in the i th time unit in the time domain, and the first channel resource is in the frequency domain for each data symbol of the N data symbols. Occupied RUs, where N is less than or equal to the total number of data symbols contained in the i-th time unit.
  • the scheme is applicable to the case where Y is smaller than X. For example, X is 12 and N is 2. For each of the 2 data symbols, the first channel resource occupies 6 RUs in the frequency domain.
  • the first channel data resource is located in the first N data symbols in the i th time unit in the time domain, and the first N-1 data symbols in the N data symbols, the first channel The resource occupies W RUs in the frequency domain.
  • the first channel resource occupies XW*(N-1) RUs in the frequency domain, where N is less than or equal to the i th
  • the total number of data symbols contained in the time unit, W is less than or equal to Y
  • XW*(N-1) is less than or equal to Y.
  • the scheme is applicable to the case where Y is smaller than X.
  • the first channel resource occupies all 15 RUs in the frequency domain, and 2 data symbols
  • the first channel resource occupies 9 RUs in the frequency domain.
  • X L*Q.
  • Q is a positive integer, and optionally, Q is 3.
  • L 1
  • the first channel resource includes 3 RUs, and when L is 4, the first channel resource includes 12 RUs.
  • Q indicates DsCCE (Data-symbol Control Information Element, The data symbol control information element) includes the number of RUs, and the DsCCE is the smallest resource occupied by the first channel resource.
  • the available bandwidth is the system bandwidth or the short TTI data transmission available bandwidth or a specific bandwidth.
  • the short TTI data transmission available bandwidth refers to the frequency domain bandwidth that can be occupied by short TTI data transmission.
  • the base station after determining, by the base station, the available bandwidth of the short TTI data transmission, the base station sends signaling indicating the available bandwidth of the short TTI data transmission to the terminal device.
  • the specific bandwidth is a predefined bandwidth, or a bandwidth configured by the base station.
  • the first channel resource when the first channel resource is located in the data symbol in the i-th time unit in the time domain, the first channel resource is a centralized channel resource, or a distributed channel resource.
  • the first channel resource is a centralized channel resource, the first channel resource is continuously distributed in the frequency domain; when the first channel resource is a distributed channel resource, the first channel resource is discontinuously distributed in the frequency domain.
  • the base station can determine that the first channel resource of the high aggregation level is a distributed channel resource.
  • the first channel resource with an aggregation level of 1 or 2 is a centralized channel resource
  • the first channel resource with an aggregation level of 4 or 8 is a distributed channel resource.
  • candidate channel resources with aggregation level 1 or 2 are centralized channel resources
  • candidate channel resources with aggregation level 4 or 8 are distributed channel resources.
  • the DCI includes information for indicating a transmission resource.
  • the transmission resource occupies at least one ERBG (Enhanced Resource Block Group) in the frequency domain.
  • ERBG Enhanced Resource Block Group
  • Any one of the ERBGs occupies P RBs in the frequency domain, where P is an integer greater than 1.
  • the ERBG includes LERBG (Localized ERBG) and DERBG (Distributed ERBG).
  • LERBG Large ERBG
  • DERBG distributed ERBG
  • One LERBG occupies consecutive subcarriers in the frequency domain, and one DERBG occupies non-contiguous subcarriers in the frequency domain.
  • one LERBG occupies P consecutive RBs in the frequency domain, and one DERBG occupies P non-contiguous RBs in the frequency domain.
  • the entire system bandwidth includes 4 ERBGs, corresponding LERBGs and DERBGs, as shown in FIG. 2D.
  • the transmission resource occupies at least one LELBG in the frequency domain. It should be noted that when the transmission resource occupies two or more LERBGs in the frequency domain, the two or more LELBGs may be continuously distributed or discontinuously distributed in the frequency domain.
  • the transmission resource occupies at least one DERBG in the frequency domain. That is, when the first channel resource carrying the DCI is a distributed channel resource, the transmission resource indicated by the DCI occupies a discontinuous frequency domain resource.
  • the first channel resource is one PDCCH in the first control region, and the first control region is located in the first The first N sym1 symbols in the slot;
  • the first channel resource is one PDCCH in the second control region, and the second control region is located in the first N sym 2 symbols in the second slot;
  • N sym1 is 1, 2, 3 or 4, and N sym2 is an integer or a positive integer.
  • N sym2 is 1, 2 or 3.
  • N sym2 is 0, 1, 2 or 3, or N sym2 is 1, 2 or 3.
  • N sym2 is 0, it means that there is no second control area on the second time unit.
  • the frequency domain resource occupied by the second control area is less than or equal to the frequency domain resource occupied by the first control area.
  • the second control region is located within the available bandwidth in the frequency domain such that the second control region is equal to or less than the available bandwidth. It should be noted that when the first control area occupies the entire system bandwidth, if the second control area also occupies the entire system bandwidth, the data transmission of the old version terminal device is affected. Because the old version terminal device does not know the existence of the second control region, in order to avoid the second control region, the base station cannot schedule the old version terminal device and the terminal device supporting short TTI transmission in the same subframe in the same carrier.
  • the frequency domain resource occupied by the second control area is smaller than the frequency domain resource occupied by the first control area. In this way, the base station can schedule the old version of the terminal device in a frequency band other than the second control region.
  • the first control area is a control area defined by LTE Rel-8, and any one of the PDCCHs in the first control area is a PDCCH defined by LTE Rel-8.
  • the first channel resource is one PDCCH in the CSS or UESS, wherein the CSS and/or the UESS are located in the first control region.
  • the first channel resource is one of feCSS (further enhanced CSS) or feUESS (further enhanced UESS).
  • PDCCH where feUESS and/or feCSS are located in the second control region.
  • the UESS includes three candidate PDCCHs with an aggregation level of 1 or 2; the UESS includes one aggregation level. Is a candidate PDCCH of 4 or 8.
  • the method before the determining, by the base station, the first channel resource, the method further includes the following operations:
  • the base station sends signaling indicating the value of N sym2 to the terminal device;
  • the signaling is the CFI (Control Format Indicator) carried by the PCFICH (Physical Control Format Indicator Channel) on the first slot, or the CFI carried by the PCFICH on the second slot. Or, the DCI carried by the PDCCH on the first slot, or higher layer signaling.
  • CFI Control Format Indicator
  • PCFICH Physical Control Format Indicator Channel
  • DCI carried by the PDCCH on the first slot, or higher layer signaling.
  • the base station configuration N sym1 and N sym2 are equal. Further, the base station sends the CFI of the PCFICH carried on the first slot to the terminal device, where the CFI indicates the values of N sym1 and N sym2 .
  • the CFI indicates the values of N sym1 and N sym2 .
  • N max is 1, 2, 3 or 4.
  • the base station configures N sym2 . Further, the base station sends the CFI of the PCFICH carried on the second slot to the terminal device, where the CFI indicates the value of N sym2 . In this way, the base station can separately configure the number of PDCCH symbols on the first time unit and the second time unit according to requirements, which may be the same or different, thereby improving the flexibility of the subframe.
  • the first channel resource carrying the DCI is located in the i-th time unit in one subframe in the time domain, and i is a positive integer less than or equal to N T , that is, each time in the subframe
  • the unit has the first channel resource. Therefore, no matter which time unit needs to transmit data, it can be transmitted immediately without waiting for the next subframe transmission, thus reducing the scheduling delay.
  • another process for sending a downlink DCI is as follows:
  • Step 300 The terminal device detects a first channel resource, a first channel resource in a subframe i-th time units in the time domain, one subframe includes N T time units, N T is greater than or equal to an integer of 2 , i is a positive integer less than or equal to N T ;
  • Step 310 The terminal device interprets the downlink control information DCI sent by the base station, where the DCI is carried in the first channel resource.
  • step 300 can also be described as follows:
  • the terminal device detects the first channel resource, where the first channel resource is in the i-th time unit within 1 ms in the time domain, and includes N T time units in 1 ms, and N T is an integer greater than or equal to 2, and i is less than or equal to A positive integer of N T .
  • N T is at least one of 2, 4, 6, 7, 12, and 14.
  • N T is 2, 4, 7, or 14; for a long CP, N T is 2, 4, 6, or 12.
  • time length of one subframe or 1 ms may be equal to the sum of time lengths of NT time units, or the time length of one subframe or 1 ms may be greater than the sum of time lengths of NT time units.
  • the two time units included in one subframe are the first time unit and the second time unit, respectively, and the first time unit is located in one subframe.
  • a slot, the second time unit is located in the second slot in one subframe, as shown in FIG. 2B.
  • the four time units included in one subframe are the first time unit, the second time unit, the third time unit, and the fourth time unit, and the first time unit is located in the first symbol set ⁇ #0 , #1, #2, #3 ⁇ , the second time unit is located in the second symbol set ⁇ #4, #5, #6 ⁇ , and the third time unit is located in the third symbol set ⁇ #7, #8, #9, #10 ⁇ , the fourth time unit is located in the fourth symbol set ⁇ #11, #12, #13 ⁇ , as shown in FIG. 2C.
  • the first time unit is located in the first symbol set ⁇ #0, #1, #2 ⁇ ; the second time unit is located in the second symbol set ⁇ #3, #4, #5 , #6 ⁇ ; the third time unit is located in the third symbol set ⁇ #7, #8, #9 ⁇ , and the fourth time unit is located in the fourth symbol set ⁇ #10, #11, #12, #13 ⁇ .
  • the method before the terminal device detects the first channel resource, the method further includes the following operations:
  • the terminal device determines that AL is L in the time period T, and L is a positive integer.
  • the terminal device Since the AL remains unchanged for a period of time, once the terminal device detects the DCI once in T, and knows that the AL of the channel resource carrying the DCI is L, it is only necessary to blindly detect that the AL is the candidate channel resource corresponding to L. Determining DCI reduces the number of blind detections of DCI, thus improving the processing speed of the terminal and reducing the power consumption of the terminal.
  • the terminal device detects the DCI transmitted by the base station for the first time, since the AL is not known, it is necessary to detect all the candidate channel resources corresponding to the AL to determine the DCI.
  • the terminal device detects the DCI sent by the base station for the first time, it knows that the AL is L. After the next three times, the terminal device only needs to detect the candidate channel resource corresponding to L as L to determine the DCI.
  • the method before the terminal device detects the first channel resource, the method further includes the following operations:
  • the terminal device receives the signaling sent by the base station, and determines that AL is L according to the signaling, and the signaling is used to indicate that the AL of the first channel resource is L, and L is a positive integer.
  • the terminal device does not need to blindly detect all candidate channel resources corresponding to the AL to acquire DCI, which reduces the processing complexity of the terminal device.
  • the aggregation level is a positive integer, for example, a value of 1, 2, 4, 8, 16, or 32.
  • the method when the terminal device detects the first channel resource, the method may be as follows:
  • the terminal device determines M candidate channel resources, and the AL of each candidate channel resource of the M candidate channel resources is L, and M is a positive integer;
  • the terminal device detects, from the M candidate channel resources, one candidate channel resource as the first channel resource.
  • the terminal device when the terminal device detects that one candidate channel resource is the first channel resource from the M candidate channel resources, the terminal device may be configured as follows:
  • the terminal device detects one candidate channel resource from the M candidate channel resources as the first channel resource according to the terminal device identifier.
  • the terminal device determines three candidate channel resources, and the AL of each of the three candidate channel resources is L, and the terminal device detects one candidate channel resource from the three candidate channel resources, and detects the channel resource.
  • the candidate channel resource is used as the first channel resource.
  • the UE ID may be a C-RNTI or an SPS C-RNTI.
  • the terminal device does not need to blindly detect M aggregation levels as L candidate channel resources.
  • the value of M is related to the number of blind detections of the DCI of the terminal device. In order to maintain a reasonable number of blind detections, the value of M cannot be too large.
  • M can be related to the aggregation level. For example, when the aggregation level is 1 or 2, M is equal to 4; when the aggregation level is 4, M is equal to 2; when the aggregation level is 8, M is equal to 1. For another example, when the aggregation level is 1 or 2, M is equal to 2.
  • the candidate channel resources with the aggregation level of 1 or 2 may be respectively located in the upper and lower sidebands of the available bandwidth.
  • the aggregation level is 4 or 8, and M is equal to 1.
  • the candidate channel resources with the aggregation level of 4 or 8 are all located on the upper sideband of the available bandwidth, or both are located in the lower sideband.
  • the candidate channel resource with the aggregation level of 4 and the candidate channel resource with the aggregation level of 8 are respectively located in the upper and lower sidebands of the available bandwidth.
  • the value M may be associated with N T.
  • M is for one time unit, that is, there are M candidate channel resources with an aggregation level of L on one time unit.
  • N T is equal to 2 and L is equal to 1 or 2, then M is equal to 3;
  • N T is equal to 2, and L is equal to 4 or 8, then M is equal to 1;
  • N T is equal to 4, 6, 7, 12 or 14, and L is equal to 1 or 2, then M is equal to 1 or 2;
  • N T is equal to 4, 6, 7, 12 or 14, and L is equal to 4 or 8, then M is equal to 1.
  • the DCI includes information for indicating a transmission resource.
  • the terminal device interprets the DCI sent by the base station, the following operations are also included:
  • the terminal device performs data transmission with the base station on the transmission resource.
  • the transmission resource indicated by the DCI occupies one time unit in the time domain.
  • the data transmission resource indicated by the resource allocation information occupies a symbol other than the PDCCH symbol in the one time unit in the time domain.
  • the data transmission resource indicated by the resource allocation information occupies a slot in the time domain, or, 2/3/4 Symbols.
  • the DCI can be used to schedule short TTI data transmissions.
  • the terminal device receives the downlink data packet sent by the base station on the transmission resource indicated by the DCI.
  • the time domain resource occupied by the transmission resource is located in the ith time unit, that is, the downlink data packet and the DCI are located in the same time unit.
  • the terminal device sends an uplink data packet to the base station on the transmission resource indicated by the DCI.
  • the time domain resource occupied by the transmission resource is located in the i+Kth time unit, that is, the time unit occupied by the uplink data packet is the Kth time unit after the i th time unit occupied by the DCI, where K is greater than or equal to 4 The integer.
  • the terminal device For the uplink data transmission, there is a case where the terminal device separately transmits the CSI on the PUSCH, that is, the terminal device does not transmit the transport block carrying the UL-SCH on the PUSCH, and only transmits the CIF of the current PUSCH reporting mode. For this case, the terminal device transmits CSI to the base station on the transmission resource indicated by the DCI.
  • the time domain resource occupied by the transmission resource is one time unit in one subframe, for example, the time domain resource occupied by the transmission resource is the i+Kth time unit.
  • the time domain resource occupied by the transmission resource is one subframe or 1 ms.
  • the time domain resource occupied by the transmission resource is one subframe occupied by the i+K time units or 1 ms; when (i+k) mod N T >1
  • the time domain resource occupied by the transmission resource is the first subframe or 1 ms after the i+Kth time unit.
  • N T is 4, K is 4, and DCI is located in the third time unit on subframe 0, then the time domain resource occupied by the transmission resource is subframe 2.
  • the DCI further includes at least one of uplink scheduling information, downlink scheduling information, and information for requesting aperiodic CSI reporting.
  • the uplink scheduling information or the downlink scheduling information includes at least one of information for indicating a transmission resource, MCS, precoding, an antenna port, and a layer number.
  • the uplink scheduling information may further include configuration information indicating an uplink reference signal, for example,
  • the configuration information indicates a time domain resource, a frequency domain resource, or a code domain resource occupied by the uplink reference signal.
  • the downlink scheduling information may further include configuration information indicating a downlink reference signal, for example, the configuration information indicates a type of the downlink reference signal, or a time domain resource, a frequency domain resource, or a code domain resource occupied by the downlink reference signal.
  • the transmission resource cannot be used to carry the DCI of other terminal devices. That is, the base station does not transmit the DCI of other terminal devices on the transmission resource. It should be noted that, if the first channel resource is located in the transmission resource indicated by the DCI, the transmission resource remaining after the first channel resource is removed from the transmission resource indicated by the DCI is not used to carry the DCI of other terminal devices.
  • the terminal device when receiving the downlink data, the terminal device knows that the DCI of other terminal devices does not appear on the data transmission resource allocated to itself. Assuming that there is no such limitation, the terminal device does not know whether the data transmission resources allocated to itself will have DCI of other terminal devices, so the base station needs to notify the terminal device by using additional DCI bits; or, the base station always reserves some possible bearers for other devices. The transmission resources of the DCI of the terminal device, these resources cannot be used for downlink data transmission, so the resource waste is increased.
  • the i-th time unit includes at least one data symbol
  • the first channel resource is located in the time domain in a data symbol in the i-th time unit.
  • the data symbol refers to a symbol other than the PDCCH symbol in the subframe, or a symbol whose sequence number is not the same as the sequence number of the PDCCH symbol in one subframe.
  • the PDCCH symbol defined by Rel-8 is a symbol for transmitting a PDCCH.
  • the PDCCH symbol when the downlink system bandwidth is less than or equal to 10 RBs, in one subframe, the PDCCH symbol is the first 2, 3 or 4 symbols of the one subframe, and the data symbol is the first 2, 3 in the one subframe. Or other symbols outside the 4 symbols; when the downlink system bandwidth is greater than 10 RBs, in one subframe, the PDCCH symbol is the first 1, 2 or 3 symbols of the one subframe, and the data symbols are in the one subframe. Remove the symbols other than the first 1, 2 or 3 symbols.
  • the base station may notify the terminal device of the PDCCH symbol number or the number of data symbols by using CFI or higher layer signaling carried by the PCFICH.
  • a PDCCH symbol of a channel resource located in an ith time unit in a time domain optionally, when the PDCCH symbol is included in the i th time unit, a PDCCH symbol of a channel resource located in an ith time unit in a time domain;
  • the first channel resource is located in the data symbol in the i-th time unit in the time domain.
  • the first channel resource when the first channel resource is located in the PDCCH symbol in the i th time unit in the time domain, the first channel resource is one candidate PDCCH in the UESS or CSS.
  • the CSS is composed of 16 CCEs, and the CSS includes four candidate PDCCHs with an aggregation level of 4.
  • the CSS includes two candidate PDCCHs with an aggregation level of 8.
  • the UESS of PDCCH UESS UESS comprising M 1 aggregation level candidate PDCCH 1 and M 2 contains the UESS aggregation level of a candidate PDCCH 2, M 4 comprising the UESS aggregation level of a candidate PDCCH 4, M 8 UESS comprising polymerized level candidates PDCCH 8, wherein, M 1 and M 2 is a positive integer less than 6, M 4 and M 8 is a positive integer of less than 2.
  • the first channel resource when the first channel resource is located in the data symbol in the i th time unit in the time domain, the first channel resource includes X RUs, and any one of the X RUs is in time. 1 symbol on the domain, occupied in the frequency domain Subcarriers, where X is a positive integer.
  • the first channel resource is located in the first data symbol in the i-th time unit in the time domain, and occupies X RUs in the frequency domain.
  • the solution is applicable only to Y is greater than or equal to X, where Y is the number of RUs occupied by the available bandwidth in the frequency domain;
  • X is 6, and on the first data symbol in the i-th time unit, the first channel resource occupies 6 RUs in the frequency domain of the available bandwidth.
  • the first channel resource is located in the first N data symbols in the i th time unit in the time domain, and the first channel resource is in the frequency domain for each data symbol of the N data symbols. Occupied The number of RUs, N is less than or equal to the total number of data symbols contained in the i-th time unit. Alternatively, the scheme is applicable to the case where Y is smaller than X. For example, X is 12 and N is 2. For each of the 2 data symbols, the first channel resource occupies 6 RUs in the frequency domain.
  • the first channel resource is located in the ith time unit in the time domain.
  • the scheme is applicable to the case where Y is smaller than X.
  • the first channel resource occupies all 15 RUs in the frequency domain, and 2 data symbols
  • the first channel resource occupies 9 RUs in the frequency domain.
  • X L*Q.
  • Q is a positive integer, and optionally, Q is 3.
  • L 1
  • the first channel resource includes 3 RUs, and when L is 4, the first channel resource includes 12 RUs.
  • Q indicates the number of RUs included in the DsCCE, and the DsCCE is the minimum resource occupied by the first channel resource.
  • the available bandwidth is the system bandwidth or the short TTI data transmission available bandwidth or a specific bandwidth.
  • the short TTI data transmission available bandwidth refers to the frequency domain bandwidth that can be occupied by short TTI data transmission.
  • the base station after determining, by the base station, the available bandwidth of the short TTI data transmission, the base station sends signaling indicating the available bandwidth of the short TTI data transmission to the terminal device.
  • the specific bandwidth is a predefined bandwidth, or a bandwidth configured by the base station.
  • the first channel resource when the first channel resource is located in the data symbol in the i-th time unit in the time domain, the first channel resource is a centralized channel resource, or a distributed channel resource.
  • the first channel resource is a centralized channel resource
  • the first channel resource is continuously distributed in the frequency domain; when the first channel resource is a distributed channel resource, the first channel resource is discontinuously distributed in the frequency domain.
  • the frequency diversity gain In order to obtain the frequency diversity gain, distributed channel resources are used when the channel state is poor, and a high aggregation level is selected when the channel state is poor, so the first channel resource of the high aggregation level is a distributed channel resource, so that The frequency diversity gain can be obtained.
  • the first channel resource with an aggregation level of 1 or 2 is a centralized channel resource
  • the first channel resource with an aggregation level of 4 or 8 is a distributed channel resource.
  • candidate channel resources with aggregation level 1 or 2 are centralized letters.
  • candidate channel resources with aggregation level 4 or 8 are distributed channel resources.
  • the DCI includes information for indicating a transmission resource.
  • the transmission resource occupies at least one LELBG in the frequency domain
  • the transmission resource occupies at least one DERBG in the frequency domain.
  • the ERBGs occupies P RBs in the frequency domain, where P is an integer greater than 1.
  • the ERBG includes LERBG and DERBG.
  • One LERBG occupies consecutive subcarriers in the frequency domain, and one DERBG occupies non-contiguous subcarriers in the frequency domain.
  • one LERBG occupies P consecutive RBs in the frequency domain, and one DERBG occupies P non-contiguous RBs in the frequency domain.
  • the entire system bandwidth includes 4 ERBGs, corresponding LERBGs and DERBGs, as shown in FIG. 2D.
  • the transmission resource occupies at least one LELBG in the frequency domain. It should be noted that when the transmission resource occupies two or more LERBGs in the frequency domain, the two or more LELBGs may be continuously distributed or discontinuously distributed in the frequency domain.
  • the transmission resource occupies at least one DERBG in the frequency domain. That is, when the first channel resource carrying the DCI is a distributed channel resource, the transmission resource indicated by the DCI occupies a discontinuous frequency domain resource.
  • the first channel resource is one PDCCH in the first control region, and the first control region is located in the first The first N sym1 symbols in the slot;
  • the first channel resource is one PDCCH in the second control region, and the second control region is located in the first N sym 2 symbols in the second slot;
  • N sym1 is 1, 2, 3 or 4, and N sym2 is a positive integer or a positive integer. Alternatively, N sym2 is 1, 2 or 3. Optionally, N sym2 is 0, 1, 2 or 3. Or, N sym2 is 1, 2 or 3. When N sym2 is 0, it means that there is no second control area on the second time unit.
  • the frequency domain resource occupied by the second control area is less than or equal to the frequency domain resource occupied by the first control area.
  • the second control region is located within the available bandwidth in the frequency domain such that the second control region is equal to or less than the available bandwidth. It should be noted that when the first control area occupies the entire system bandwidth, if the second control area also occupies the entire system bandwidth, the data transmission of the old version terminal device is affected. Because the old version terminal device does not know the existence of the second control region, in order to avoid the second control region, the base station cannot schedule the old version terminal device and the terminal device supporting short TTI transmission in the same subframe in the same carrier.
  • the frequency domain resource occupied by the second control area is smaller than the frequency domain resource occupied by the first control area. In this way, the base station can schedule the old version of the terminal device in a frequency band other than the second control region.
  • the first control area is a control area defined by LTE Rel-8, and any one of the PDCCHs in the first control area is a PDCCH defined by LTE Rel-8.
  • the first channel resource is one PDCCH in the CSS or UESS, wherein the CSS and/or the UESS are located in the first control region.
  • the first channel resource is one of feCSS or feUESS, wherein feUESS and/or feCSS are located in the second control region.
  • the UESS includes three candidate PDCCHs with an aggregation level of 1 or 2; the UESS includes one aggregation level. Is a candidate PDCCH of 4 or 8.
  • the method before the terminal device detects the first channel resource, the method further includes the following operations:
  • the terminal device receives signaling sent by the base station to indicate the value of N sym2 ;
  • the signaling is the CFI carried by the PCFICH on the first slot, or the CFI carried by the PCFICH on the second slot, or the DCI carried by the PDCCH on the first slot, or higher layer signaling.
  • N sym1 and N sym2 are equal.
  • the terminal device receives the CFI of the PCFICH carried by the base station and is carried by the base station, where the CFI indicates the values of N sym1 and N sym2 .
  • the CFI indicates the values of N sym1 and N sym2 .
  • N sym2 F(N sym1 ), where F(N sym1 ) represents a function with N sym1 as a parameter, and further, the terminal device receives the CFI of the PCFICH carried by the base station and carried on the first slot, The CFI indicates the value of N sym1 .
  • N max is 1, 2, 3 or 4.
  • the base station configures N sym2 .
  • the terminal device receives the CFI of the PCFICH carried by the base station and is carried by the base station, where the CFI indicates the value of N sym2 .
  • the base station can separately configure the number of PDCCH symbols on the first time unit and the second time unit according to requirements, which may be the same or different, thereby improving the flexibility of the subframe.
  • the first channel resource carrying the DCI is located in the i-th time unit in one subframe in the time domain, and i is a positive integer less than or equal to N T , that is, each time in the subframe
  • the unit has the first channel resource. Therefore, no matter which time unit needs to transmit data, it can be transmitted immediately without waiting for the next subframe transmission, thus reducing the scheduling delay.
  • a base station is provided, where the base station includes a processing unit 40 and a sending unit 41, where:
  • Processing unit 40 for determining a first channel resource, the channel resource in a first subframe i-th time units in the time domain, one subframe includes N T time units, N T is greater than or equal to 2 An integer, i is a positive integer less than or equal to N T ;
  • the sending unit 41 is configured to send downlink control information DCI to the terminal device on the first channel resource.
  • N T is at least one of 2, 4, 6, 7, 12, and 14.
  • time units included in one subframe are respectively a first time unit and a second time unit, and the first time unit is located in a subframe. a slot, the second time unit is located in a second slot in a subframe;
  • the four time units included in one subframe are the first time unit, the second time unit, the third time unit, and the fourth time unit, and the first time unit is located in the first symbol set ⁇ #0 , #1, #2, #3 ⁇ , the second time unit is located in the second symbol set ⁇ #4, #5, #6 ⁇ , and the third time unit is located in the third symbol set ⁇ #7, #8, #9, #10 ⁇ , the fourth time unit is located in the fourth symbol set ⁇ #11, #12, #13 ⁇ .
  • the processing unit 40 is further configured to: determine that the aggregation level AL is L and L is a positive integer in a time period of T; or, determine that AL is L, and send signaling to the terminal device, The signaling is used to indicate that the AL of the first channel resource is L, and L is a positive integer.
  • the processing unit 40 determines the first channel resource, specifically:
  • One candidate channel resource is selected from the M candidate channel resources as the first channel resource.
  • the processing unit 40 selects one candidate channel resource from the M candidate channel resources as the first channel resource, specifically:
  • one candidate channel resource is selected as the first channel resource from the M candidate channel resources.
  • N T is equal to 2, and L is equal to 1 or 2, then M is equal to 3;
  • N T is equal to 2, and L is equal to 4 or 8, then M is equal to 1;
  • N T is equal to 4, 6, 7, 12 or 14, and L is equal to 1 or 2, then M is equal to 1 or 2;
  • N T is equal to 4, 6, 7, 12 or 14, and L is equal to 4 or 8, then M is equal to 1.
  • the DCI includes information for indicating a transmission resource.
  • the sending unit 41 is further configured to perform data transmission with the terminal device on the transmission resource.
  • the transmission resource cannot be used to carry the DCI of other terminal devices.
  • the i-th time unit includes at least one data symbol
  • the first channel resource is located in the time domain in a data symbol in the i-th time unit.
  • the PDCCH symbol of the first channel resource is located in the i th time unit in the time domain;
  • the first channel resource is located in the data symbol in the i-th time unit in the time domain.
  • the first channel resource when the first channel resource is located in the data symbol in the i th time unit in the time domain, the first channel resource includes X RUs, and any one of the X RUs is in time. 1 symbol on the domain, occupied in the frequency domain Subcarriers, where X is a positive integer.
  • the first channel resource is located in the first data symbol in the i-th time unit in the time domain, and occupies X RUs in the frequency domain, where Y is the number of RUs occupied by the available bandwidth in the frequency domain;
  • the first channel resource is located in the first N data symbols in the i-th time unit in the time domain, and for each data symbol of the N data symbols, the first channel resource occupies NX RUs in the frequency domain. , N is less than or equal to the total number of data symbols contained in the i-th time unit;
  • the first channel resource is located in the first N data symbols in the i-th time unit in the time domain, and the first channel resource is in the frequency domain for the first N-1 data symbols in the N data symbols. Occupying W RUs, for the Nth data symbol of the N data symbols, the first channel resource occupies XW*(N-1) RUs in the frequency domain, and N is less than or equal to the data included in the i th time unit The total number of symbols, W is less than or equal to Y, and XW*(N-1) is less than or equal to Y.
  • the first channel resource when the first channel resource is located in the data symbol in the i-th time unit in the time domain, the first channel resource is a centralized channel resource, or a distributed channel resource.
  • the DCI includes information for indicating a transmission resource.
  • the transmission resource occupies at least one centralized enhanced resource block group LELBG in the frequency domain;
  • the transmission resource occupies at least one distributed enhanced resource block group DERBG in the frequency domain.
  • the first channel resource is one PDCCH in the first control region, and the first control region is located in the first The first N sym1 symbols in the slot;
  • the first channel resource is one PDCCH in the second control region, and the second control region is located in the first N sym 2 symbols in the second slot;
  • the N sym1 is 1, 2, 3 or 4, and N sym2 is a positive integer.
  • the frequency domain resource occupied by the second control area is less than or equal to the frequency domain resource occupied by the first control area.
  • the sending unit 41 is further configured to: send, to the terminal device, signaling that indicates a value of N sym2 ;
  • the signaling is the control format indication CFI of the physical control format indication channel PCFICH carried on the first slot, or the CFI carried by the PCFICH on the second slot, or the DCI carried by the PDCCH on the first slot. Or, high-level signaling.
  • FIG. 4B a schematic diagram of a base station is provided.
  • the base station includes a processor 400 and a transmitter 410, where:
  • the processor 400 for determining a first channel resource, the channel resource in a first subframe i-th time units in the time domain, one subframe includes N T time units, N T is greater than or equal to 2 An integer, i is a positive integer less than or equal to N T ;
  • the transmitter 410 is configured to send downlink control information DCI to the terminal device on the first channel resource.
  • processor 400 is further configured to perform other operations performed by the processing unit 40
  • transmitter 410 is further configured to perform other operations performed by the sending unit 41.
  • the base stations described in FIG. 4A and FIG. 4B can perform all the steps in the first embodiment, that is, the steps that the base station described in FIG. 4A and FIG. 4B can perform are not specifically described in the third embodiment. Operations such as simplification or expansion, but if these steps have specific refinement or extension operations in the first embodiment, operations such as specific refinement or extension of these steps are equally applicable to the base stations described in FIG. 4A and FIG. 4B.
  • the base station described in FIG. 4A and FIG. 4B can specifically refine and expand the corresponding steps according to the specific refinement and extension of the first embodiment.
  • the first channel resource determined by the base station provided by FIG. 4A and FIG. 4B is located in the i-th time unit in one subframe in the time domain, and i is a positive integer less than or equal to N T , that is, in the subframe
  • i is a positive integer less than or equal to N T , that is, in the subframe
  • Each time unit has a first channel resource. Therefore, no matter which time unit needs to transmit data, the base stations provided in FIG. 4A and FIG. 4B can be transmitted immediately without waiting for the next subframe transmission.
  • the base stations provided by 4A and 4B reduce the scheduling delay.
  • a terminal device As shown in FIG. 5A, in the embodiment of the present invention, a terminal device is provided, where the terminal device includes a processing unit 50 and a sending unit 51, where:
  • Processing unit 50 for detecting a first channel resource, a first channel resource is located in the time domain in one subframe i-th time unit, a subframe includes N T time units, N T is greater than or equal to 2 An integer, i is a positive integer less than or equal to N T ;
  • the sending unit 51 is configured to interpret the downlink control information DCI sent by the base station, where the DCI is carried in the first channel resource.
  • N T is at least one of 2, 4, 6, 7, 12, and 14.
  • the two time units included in one subframe are the first time unit and the second time unit, respectively, and the first time unit is located in one subframe.
  • a slot the second time unit is located in a second slot in a subframe;
  • the four time units included in one subframe are the first time unit, the second time unit, the third time unit, and the fourth time unit, and the first time unit is located in the first symbol set ⁇ #0 , #1, #2, #3 ⁇ , the second time unit is located in the second symbol set ⁇ #4, #5, #6 ⁇ , and the third time unit is located in the third symbol set ⁇ #7, #8, #9, #10 ⁇ , the fourth time unit is located in the fourth symbol set ⁇ #11, #12, #13 ⁇ .
  • the processing unit 50 is further configured to: determine that the aggregation level AL is L and L is a positive integer in a time period of T; or
  • the method further includes a receiving unit 52, configured to receive signaling sent by the base station;
  • the processing unit 50 is further configured to determine, according to the signaling received by the receiving unit, that the AL is L, and the signaling is used to indicate that the AL of the first channel resource is L, and L is a positive integer.
  • the processing unit 50 detects the first channel resource, specifically:
  • each of the M candidate channel resources AL is L, and M is a positive integer
  • One candidate channel resource is detected as the first channel resource from the M candidate channel resources.
  • the processing unit 50 detects, from the M candidate channel resources, that one candidate channel resource is the first channel resource, specifically:
  • one candidate channel resource is detected as the first channel resource from the M candidate channel resources.
  • N T is equal to 2, and L is equal to 1 or 2, then M is equal to 3;
  • N T is equal to 2, and L is equal to 4 or 8, then M is equal to 1;
  • N T is equal to 4, 6, 7, 12 or 14, and L is equal to 1 or 2, then M is equal to 1 or 2;
  • N T is equal to 4, 6, 7, 12 or 14, and L is equal to 4 or 8, then M is equal to 1.
  • the DCI includes information for indicating a transmission resource.
  • the sending unit 51 is further configured to perform data transmission with the base station on the transmission resource.
  • the transmission resource cannot be used to carry the DCI of other terminal devices.
  • the i-th time unit includes at least one data symbol
  • the first channel resource is located in the time domain in a data symbol in the i-th time unit.
  • the PDCCH symbol of the first channel resource is located in the i th time unit in the time domain;
  • the first channel resource is located in the data symbol in the i-th time unit in the time domain.
  • the first channel resource when the first channel resource is located in the data symbol in the i th time unit in the time domain, the first channel resource includes X RUs, and any one of the X RUs is in time. 1 symbol on the domain, occupied in the frequency domain Subcarriers, where X is a positive integer.
  • the first channel resource is located in the first data symbol in the i-th time unit in the time domain, and occupies X RUs in the frequency domain, where Y is the number of RUs occupied by the available bandwidth in the frequency domain;
  • the first channel resource is located in the first N data symbols in the i-th time unit in the time domain, and for each data symbol of the N data symbols, the first channel resource is occupied in the frequency domain.
  • RU N is less than or equal to the total number of data symbols contained in the i-th time unit;
  • the first channel resource is located in the first N data symbols in the i-th time unit in the time domain, and the first channel resource is in the frequency domain for the first N-1 data symbols in the N data symbols. Occupying W RUs, for the Nth data symbol of the N data symbols, the first channel resource occupies XW*(N-1) RUs in the frequency domain, and N is less than or equal to the data included in the i th time unit The total number of symbols, W is less than or equal to Y, and XW*(N-1) is less than or equal to Y.
  • the first channel resource when the first channel resource is located in the data symbol in the i-th time unit in the time domain, the first channel resource is a centralized channel resource, or a distributed channel resource.
  • the DCI includes information for indicating a transmission resource.
  • the transmission resource occupies at least one centralized enhanced resource block group LELBG in the frequency domain;
  • the transmission resource occupies at least one distributed enhanced resource block group DERBG in the frequency domain.
  • the first channel resource is one PDCCH in the first control region, and the first control region is located in the first The first N sym1 symbols in the slot;
  • the first channel resource is one PDCCH in the second control region, and the second control region is located in the first N sym 2 symbols in the second slot;
  • the N sym1 is 1, 2, 3 or 4, and N sym2 is a positive integer.
  • the frequency domain resource occupied by the second control area is less than or equal to the frequency domain resource occupied by the first control area.
  • the embodiment of the present invention further includes a receiving unit 52, configured to receive signaling sent by the base station to indicate the value of N sym2 ;
  • the signaling is the control format indication CFI of the physical control format indication channel PCFICH carried on the first slot, or the CFI carried by the PCFICH on the second slot, or the DCI carried by the PDCCH on the first slot. Or, high-level signaling.
  • the base station includes a processor 500 and a transmitter 510, where:
  • the processor 500 for detecting a first channel resource, a first channel resource is located in the time domain in one subframe i-th time unit, a subframe includes N T time units, N T is greater than or equal to 2 An integer, i is a positive integer less than or equal to N T ;
  • the transmitter 510 is configured to interpret the downlink control information DCI sent by the base station, where the DCI is carried in the first channel resource.
  • the processor 500 is further configured to perform other operations performed by the processing unit 50
  • the transmitter 510 is further configured to perform other operations performed by the sending unit 51
  • the terminal device described in FIG. 5A and FIG. 5B can perform all the steps in the second embodiment, that is, the steps that the terminal device described in FIG. 5A and FIG. 5B can perform are not even in the fourth embodiment. Specific operations such as refinement or expansion, but these steps have specific refinement or expansion operations in the second embodiment, and the specific refinement or expansion of these steps also applies to the terminal described in FIG. 5A and FIG. 5B.
  • the device, the terminal device described in FIG. 5A and FIG. 5B can specifically refine and expand the corresponding steps according to the specific refinement and extension of the second embodiment.
  • the first channel resource detected by the terminal device in the time domain is located in the i-th time unit in one subframe, and i is a positive integer less than or equal to N T , that is, the subframe
  • i is a positive integer less than or equal to N T , that is, the subframe
  • Each time unit has a first channel resource, so no matter which time unit needs to transmit data, it can be transmitted immediately, without waiting for the next subframe transmission, that is, Figure 5A and Figure 5B
  • the terminal device provided can receive the data immediately, no matter which time unit needs to receive the data, and does not need to wait until the next subframe is received. Therefore, the terminal device provided in FIG. 5A and FIG. 5B reduces the scheduling delay.
  • embodiments of the present invention may be provided as a method, system, or Computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种发送下行DCI的方法及装置:基站确定第一信道资源,第一信道资源在时域上位于一个子帧中的第i个时间单元,一个子帧包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数;基站在第一信道资源上向终端设备发送DCI,在该方案中,承载DCI的第一信道资源在时域上位于一个子帧中的第i个时间单元,i为小于或者等于NT的正整数,也就是说,子帧中的每一个时间单元均有第一信道资源,因此,无论在哪一个时间单元上需要传输数据,都可以立即传输,不需要等到下一个子帧传输,因此,降低了调度时延。

Description

一种发送下行控制信息DCI的方法及装置 技术领域
本发明涉及通信技术领域,尤其涉及一种发送DCI(Downlink Control Information,下行控制信息)的方法及装置。
背景技术
LTE(Long Term Evolution,长期演进)系统中,终端设备在接收下行数据或发送上行数据前,需要知道基站配置给终端设备的调度信息,如时频资源分配、调制编码方式等,另外,基站也需要通知终端设备与上行传输相关的功控命令信息。这些调度信息和功控命令信息属于DCI。目前,基站主要通过PDCCH(Physical Downlink Control Channel,物理下行控制信道)承载DCI。
目前的TTI(Transmission Time Interval,传输时间间隔)为一个子帧的时长,即1ms,随着技术的演进,为了降低时延,需要缩减TTI时长,这对当前的数据传输机制提出了新的需求。
目前定义的PDCCH,例如版本(Rel)-8定义的PDCCH和Rel-11定义的ePDCCH(Enhanced PDCCH,增强PDCCH),都是用于调度TTI时长为1ms的数据包,对于TTI时长小于1ms的数据包,存在调度时延较长的缺陷。
以图1为例,PDCCH区域位于1个子帧内的前2个符号,当基站需要在1个子帧内的第6个符号调度数据包时,针对Rel-8定义的PDCCH,不能在当前子帧上立即调度数据包,需要延迟8个符号后,即在下一个子帧上才能调度该数据包。因此,针对TTI小于1ms的数据包,存在调度时延较长的缺陷。
发明内容
本发明实施例提供了一种发送下行DCI的方法,用于解决现有技术中存在的调度时延较长的缺陷。
第一方面,提供一种发送下行控制信息DCI的方法,包括:
基站确定第一信道资源,所述第一信道资源在时域上位于一个子帧中的第i个时间单元,所述一个子帧包含NT个时间单元,所述NT为大于或者等于2的整数,所述i为小于或者等于所述NT的正整数;
所述基站在所述第一信道资源上向终端设备发送下行控制信息DCI。
结合第一方面,在第一种可能的实现方式中,所述NT为2、4、6、7、12,及14中的至少一种。
结合第一方面,或者第一方面的第一种可能的实现方式,在第二种可能的实现方式中,当所述NT=2时,所述一个子帧中包含的2个时间单元分别为第一时间单元和第二时间单元,所述第一时间单元位于所述一个子帧中的第一个slot,所述第二时间单元位于所述一个子帧中的第二个slot;
当所述NT=4时,所述一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,所述第一时间单元位于第一符号集{#0,#1,#2,#3},所述第二时间单元位于第二符号集{#4,#5,#6},所述第三时间单元位于第三符号集{#7,#8,#9,#10},所述第四时间单元位于第四符号集{#11,#12,#13}。
结合第一方面,或者第一方面的第一种至第二种可能的实现方式,在第三种可能的实现方式中,所述基站确定第一信道资源之前,还包括:
所述基站确定聚合级别AL在时长为T的时间内为L,所述L为正整数;或者,
所述基站确定AL为L,并向所述终端设备发送信令,所述信令用于指示所述第一信道资源的AL为所述L,所述L为正整数。
结合第一方面,或者第一方面的第一种至第三种可能的实现方式,在第四种可能的实现方式中,所述基站确定第一信道资源,包括:
所述基站确定M个候选信道资源,所述M个候选信道资源中的每个候选信道资源的AL均为L,所述M为正整数;
所述基站从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源。
结合第一方面的第四种可能的实现方式,在第五种可能的实现方式中,所述基站从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源,包括:
所述基站根据终端设备标识,从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源。
结合第一方面的第四种或者第五种可能的实现方式,在第六种可能的实现方式中,若所述NT等于2,且所述L等于1或2,则所述M等于3;
若所述NT等于2,且所述L等于4或8,则所述M等于1;
若所述NT等于4,6,7,12或14,且所述L等于1或2,则所述M等于1或2;
若所述NT等于4,6,7,12或14,且所述L等于4或8,则所述M等于1。
结合第一方面,或者第一方面的第一种至第六种可能的实现方式,在第七种可能的实现方式中,所述DCI包括用于指示传输资源的信息;
所述基站在所述第一信道资源上向终端设备发送DCI之后,还包括:
所述基站在所述传输资源上与所述终端设备进行数据传输。
结合第一方面的第七种可能的实现方式,在第八种可能的实现方式中,所述传输资源不能够用于承载其他终端设备的DCI。
结合第一方面,或者第一方面的第一种至第八种可能的实现方式,在第九种可能的实现方式中,所述第i个时间单元包括至少一个数据符号,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
结合第一方面,或者第一方面的第一种至第八种可能的实现方式,在第十种可能的实现方式中,当所述第i个时间单元中包括PDCCH符号时,所述第一信道资源在时域上位于所述第i个时间单元中的所述PDCCH符号;
当所述第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
结合第一方面的第九种或者第十种可能的实现方式,在第十一种可能的实现方式中,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源包括X个RU,所述X个RU中的任意一RU在时域上占用1个符号,在频域上占用
Figure PCTCN2015092580-appb-000001
个子载波,其中,X为正整数。
结合第一方面的第十一种可能的实现方式,在第十二种可能的实现方式中,若Y大于或者等于X,所述第一信道资源在时域上位于所述第i个时间单元中的第一个数据符号,在频域上占用所述X个RU,其中,Y为可用带宽在频域上占用的RU数;
若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号的每个数据符号,所述第一信道资源在频域上占用所述
Figure PCTCN2015092580-appb-000002
个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数;
若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号中的前N-1个数据符号,所述第一信道资源在频域上占用W个RU,针对所述N个数据符号中的第N个数据符号,所述第一信道资源在频域上占用X-W*(N-1)个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数,所述W小于或等于所述Y,X-W*(N-1)小于或等于所述Y。
结合第一方面,或者第一方面的第一种至第十二种可能的实现方式,在第十三种可能的实现方式中,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源为集中式信道资源,或者,分布式信道资源。
结合第一方面的第十三种可能的实现方式,在第十四种可能的实现方式中,所述DCI包括用于指示传输资源的信息;
若所述第一信道资源为集中式信道资源,所述传输资源在频域上占用至少一个集中式增强资源块组LERBG;
若所述第一信道资源为分布式信道资源,所述传输资源在频域上占用至少一个分布式增强资源块组DERBG。
结合第一方面的第二种至第七种可能的实现方式,在第十五种可能的实现方式中,若NT=2,且所述第i个时间单元为所述第一时间单元,所述第一信道资源为第一控制区域中的一个PDCCH,所述第一控制区域位于所述第一个slot中的前Nsym1个符号;
若NT=2,且所述第i个时间单元为所述第二时间单元,所述第一信道资源为第二控制区域中的一个PDCCH,所述第二控制区域位于所述第二个slot中的前Nsym2个符号;
其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
结合第一方面的第十五种可能的实现方式,在第十六种可能的实现方式中,基站确定第一信道资源之前,还包括:
所述基站向终端设备发送指示所述Nsym2取值的信令;
其中,所述信令为所述第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,所述第二个slot上的PCFICH承载的CFI,或者,高层信令。
第二方面,提供一种接收下行控制信息DCI的方法,包括:
终端设备检测第一信道资源,所述第一信道资源在时域上位于一个子帧中的第i个时间单元,所述一个子帧包含NT个时间单元,所述NT为大于或者等于2的整数,所述i为小于或者等于所述NT的正整数;
所述终端设备解译基站发送的下行控制信息DCI,所述DCI承载于所述第一信道资源。
结合第二方面,在第一种可能的实现方式中,所述NT为2、4、6、7、12, 及14中的至少一种。
结合第二方面,或者第二方面的第一种可能的实现方式,在第二种可能的实现方式中,当所述NT=2时,所述一个子帧中包含的2个时间单元分别为第一时间单元和第二时间单元,所述第一时间单元位于所述一个子帧中的第一个slot,所述第二时间单元位于所述一个子帧中的第二个slot;
当所述NT=4时,所述一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,所述第一时间单元位于第一符号集{#0,#1,#2,#3},所述第二时间单元位于第二符号集{#4,#5,#6},所述第三时间单元位于第三符号集{#7,#8,#9,#10},所述第四时间单元位于第四符号集{#11,#12,#13}。
结合第二方面,或者第二方面的第一种至第二种可能的实现方式,在第三种可能的实现方式中,所述终端设备检测第一信道资源之前,还包括:
所述终端设备确定聚合级别AL在时长为T的时间内为L,所述L为正整数;或者,
所述终端设备接收所述基站发送的信令,并根据所述信令确定AL为L,所述信令用于指示所述第一信道资源的AL为所述L,所述L为正整数。
结合第二方面,或者第二方面的第一种至第三种可能的实现方式,在第四种可能的实现方式中,所述终端设备检测第一信道资源,包括:
所述终端设备确定M个候选信道资源,所述M个候选信道资源中的每个候选信道资源的AL均为L,所述M为正整数;
所述终端设备从所述M个候选信道资源中检测出一个候选信道资源为所述第一信道资源。
结合第二方面,或者第二方面的第一种至第三种可能的实现方式,在第五种可能的实现方式中,所述终端设备从所述M个候选信道资源中检测出一个候选信道资源为所述第一信道资源,包括:
所述终端设备根据终端设备标识,从所述M个候选信道资源中检测出一 个候选信道资源作为所述第一信道资源。
结合第二方面的第四种或者第五种可能的实现方式,在第六种可能的实现方式中,若所述NT等于2,且所述L等于1或2,则所述M等于3;
若所述NT等于2,且所述L等于4或8,则所述M等于1;
若所述NT等于4,6,7,12或14,且所述L等于1或2,则所述M等于1或2;
若所述NT等于4,6,7,12或14,且所述L等于4或8,则所述M等于1。
结合第二方面,或者第二方面的第一种至第六种可能的实现方式,在第七种可能的实现方式中,所述DCI包括用于指示传输资源的信息;
所述终端设备解译基站发送的DCI之后,还包括:
所述终端设备在所述传输资源上与所述基站进行数据传输。
结合第二方面的第七种可能的实现方式,在第八种可能的实现方式中,所述传输资源不能够用于承载其他终端设备的DCI。
结合第二方面,或者第二方面的第一种至第八种可能的实现方式,在第九种可能的实现方式中,所述第i个时间单元包括至少一个数据符号,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
结合第二方面,或者第二方面的第一种至第八种可能的实现方式,在第十种可能的实现方式中,当所述第i个时间单元中包括PDCCH符号时,所述第一信道资源在时域上位于所述第i个时间单元中的PDCCH符号;
当所述第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
结合第二方面的第九种或者第十种可能的实现方式,在第十一种可能的实现方式中,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源包括X个RU,所述X个RU中的任意一RU在时域上占用1个符号,在频域上占用
Figure PCTCN2015092580-appb-000003
个子载波,其中,X为正整数。
结合第二方面的第十一种可能的实现方式,在第十二种可能的实现方式中,若Y大于或者等于X,所述第一信道资源在时域上位于所述第i个时间单元中的第一个数据符号,在频域上占用所述X个RU,其中,Y为可用带宽在频域上占用的RU数;
若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号的每个数据符号,所述第一信道资源在频域上占用所述
Figure PCTCN2015092580-appb-000004
个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数;
若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号中的前N-1个数据符号,所述第一信道资源在频域上占用W个RU,针对所述N个数据符号中的第N个数据符号,所述第一信道资源在频域上占用X-W*(N-1)个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数,所述W小于或等于所述Y,X-W*(N-1)小于或等于所述Y。
结合第二方面,或者第二方面的第一种至第十二种可能的实现方式,在第十三种可能的实现方式中,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源为集中式信道资源,或者,分布式信道资源。
结合第二方面的第十三种可能的实现方式,在第十四种可能的实现方式中,所述DCI包括用于指示传输资源的信息;
若所述第一信道资源为集中式信道资源,所述传输资源在频域上占用至少一个集中式增强资源块组LERBG;
若所述第一信道资源为分布式信道资源,所述传输资源在频域上占用至少一个分布式增强资源块组DERBG。
结合第二方面的第二种至第七种可能的实现方式,在第十五种可能的实现方式中,若NT=2,且所述第i个时间单元为所述第一时间单元,所述第一 信道资源为第一控制区域中的一个PDCCH,所述第一控制区域位于所述第一个slot中的前Nsym1个符号;
若NT=2,且所述第i个时间单元为所述第二时间单元,所述第一信道资源为第二控制区域中的一个PDCCH,所述第二控制区域位于所述第二个slot中的前Nsym2个符号;
其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
结合第二方面的第十五种可能的实现方式,在第十六种可能的实现方式中,所述终端设备检测第一信道资源之前,还包括:
所述终端设备接收所述基站发送的用于指示所述Nsym2取值的信令;
其中,所述信令为所述第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,所述第二个slot上的PCFICH承载的CFI,或者,高层信令。
第三方面,提供一种基站,包括:
处理单元,用于确定第一信道资源,所述第一信道资源在时域上位于一个子帧中的第i个时间单元,所述一个子帧包含NT个时间单元,所述NT为大于或者等于2的整数,所述i为小于或者等于所述NT的正整数;
发送单元,用于在所述第一信道资源上向终端设备发送下行控制信息DCI。
结合第三方面,在第一种可能的实现方式中,所述NT为2、4、6、7、12,及14中的至少一种。
结合第三方面,或者第三方面的第一种可能的实现方式,在第二种可能的实现方式中,当所述NT=2时,所述一个子帧中包含的36个时间单元分别为第一时间单元和第二时间单元,所述第一时间单元位于所述一个子帧中的第一个slot,所述第二时间单元位于所述一个子帧中的第二个slot;
当所述NT=4时,所述一个子帧中包含的4个时间单元为第一时间单元、 第二时间单元、第三时间单元和第四时间单元,所述第一时间单元位于第一符号集{#0,#1,#2,#3},所述第二时间单元位于第二符号集{#4,#5,#6},所述第三时间单元位于第三符号集{#7,#8,#9,#10},所述第四时间单元位于第四符号集{#11,#12,#13}。
结合第三方面,或者第三方面的第一种至第二种可能的实现方式,在第三种可能的实现方式中,所述处理单元还用于,确定聚合级别AL在时长为T的时间内为L,所述L为正整数;或者,确定AL为L,并向所述终端设备发送信令,所述信令用于指示所述第一信道资源的AL为所述L,所述L为正整数。
结合第三方面,或者第三方面的第一种至第三种可能的实现方式,在第四种可能的实现方式中,所述处理单元确定第一信道资源时,具体为:
确定M个候选信道资源,所述M个候选信道资源中的每个候选信道资源的AL均为L,所述M为正整数;
从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源。
结合第三方面的第四种可能的实现方式,在第五种可能的实现方式中,所述处理单元从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源时,具体为:
根据终端设备标识,从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源。
结合第三方面的第四种或者第五种可能的实现方式,在第六种可能的实现方式中,若所述NT等于2,且所述L等于1或2,则所述M等于3;
若所述NT等于2,且所述L等于4或8,则所述M等于1;
若所述NT等于4,6,7,12或14,且所述L等于1或2,则所述M等于1或2;
若所述NT等于4,6,7,12或14,且所述L等于4或8,则所述M等于 1。
结合第三方面,或者第三方面的第一种至第六种可能的实现方式,在第七种可能的实现方式中,所述DCI包括用于指示传输资源的信息;
所述发送单元还用于,在所述传输资源上与所述终端设备进行数据传输。
结合第三方面的第七种可能的实现方式,在第八种可能的实现方式中,所述传输资源不能够用于承载其他终端设备的DCI。
结合第三方面,或者第三方面的第一种至第八种可能的实现方式,在第九种可能的实现方式中,所述第i个时间单元包括至少一个数据符号,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
结合第三方面,或者第三方面的第一种至第八种可能的实现方式,在第十种可能的实现方式中,当所述第i个时间单元中包括PDCCH符号时,所述第一信道资源在时域上位于所述第i个时间单元中的所述PDCCH符号;
当所述第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
结合第三方面的第九种或者第十种可能的实现方式,在第十一种可能的实现方式中,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源包括X个RU,所述X个RU中的任意一RU在时域上占用1个符号,在频域上占用
Figure PCTCN2015092580-appb-000005
个子载波,其中,X为正整数。
结合第三方面的第十一种可能的实现方式,在第十二种可能的实现方式中,若Y大于或者等于X,所述第一信道资源在时域上位于所述第i个时间单元中的第一个数据符号,在频域上占用所述X个RU,其中,Y为可用带宽在频域上占用的RU数;
若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号的每个数据符号,所述第一信道资源在频域上占用所述
Figure PCTCN2015092580-appb-000006
个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数;
若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号中的前N-1个数据符号,所述第一信道资源在频域上占用W个RU,针对所述N个数据符号中的第N个数据符号,所述第一信道资源在频域上占用X-W*(N-1)个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数,所述W小于或等于所述Y,X-W*(N-1)小于或等于所述Y。
结合第三方面,或者第三方面的第一种至第十二种可能的实现方式,在第十三种可能的实现方式中,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源为集中式信道资源,或者,分布式信道资源。
结合第三方面的第十三种可能的实现方式,在第十四种可能的实现方式中,所述DCI包括用于指示传输资源的信息;
若所述第一信道资源为集中式信道资源,所述传输资源在频域上占用至少一个集中式增强资源块组LERBG;
若所述第一信道资源为分布式信道资源,所述传输资源在频域上占用至少一个分布式增强资源块组DERBG。
结合第三方面的第二种至第七种可能的实现方式,在第十五种可能的实现方式中,若NT=2,且所述第i个时间单元为所述第一时间单元,所述第一信道资源为第一控制区域中的一个PDCCH,所述第一控制区域位于所述第一个slot中的前Nsym1个符号;
若NT=2,且所述第i个时间单元为所述第二时间单元,所述第一信道资源为第二控制区域中的一个PDCCH,所述第二控制区域位于所述第二个slot中的前Nsym2个符号;
其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
结合第三方面的第十五种可能的实现方式,在第十六种可能的实现方式 中,所述发送单元还用于,向终端设备发送指示所述Nsym2取值的信令;
其中,所述信令为所述第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,所述第二个slot上的PCFICH承载的CFI,或者,高层信令。
第四方面,提供一种终端设备,包括:
处理单元,用于检测第一信道资源,所述第一信道资源在时域上位于一个子帧中的第i个时间单元,所述一个子帧包含NT个时间单元,所述NT为大于或者等于2的整数,所述i为小于或者等于所述NT的正整数;
发送单元,用于解译基站发送的下行控制信息DCI,所述DCI承载于所述第一信道资源。
结合第四方面,在第一种可能的实现方式中,所述NT为2、4、6、7、12,及14中的至少一种。
结合第四方面,或者第四方面的第一种可能的实现方式,在第二种可能的实现方式中,当所述NT=2时,所述一个子帧中包含的2个时间单元分别为第一时间单元和第二时间单元,所述第一时间单元位于所述一个子帧中的第一个slot,所述第二时间单元位于所述一个子帧中的第二个slot;
当所述NT=4时,所述一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,所述第一时间单元位于第一符号集{#0,#1,#2,#3},所述第二时间单元位于第二符号集{#4,#5,#6},所述第三时间单元位于第三符号集{#7,#8,#9,#10},所述第四时间单元位于第四符号集{#11,#12,#13}。
结合第四方面,或者第四方面的第一种至第二种可能的实现方式,在第三种可能的实现方式中,所述处理单元还用于,确定聚合级别AL在时长为T的时间内为L,所述L为正整数;或者,
还包括接收单元,用于接收所述基站发送的信令;
所述处理单元还用于,根据所述接收单元接收到的信令确定AL为L,所 述信令用于指示所述第一信道资源的AL为所述L,所述L为正整数。
结合第四方面,或者第四方面的第一种至第三种可能的实现方式,在第四种可能的实现方式中,所述处理单元检测第一信道资源时,具体为:
确定M个候选信道资源,所述M个候选信道资源中的每个候选信道资源的AL均为L,所述M为正整数;
从所述M个候选信道资源中检测出一个候选信道资源为所述第一信道资源。
结合第四方面,或者第四方面的第一种至第三种可能的实现方式,在第五种可能的实现方式中,所述处理单元从所述M个候选信道资源中检测出一个候选信道资源为所述第一信道资源时,具体为:
根据终端设备标识,从所述M个候选信道资源中检测出一个候选信道资源作为所述第一信道资源。
结合第四方面的第四种或者第五种可能的实现方式,在第六种可能的实现方式中若所述NT等于2,且所述L等于1或2,则所述M等于3;
若所述NT等于2,且所述L等于4或8,则所述M等于1;
若所述NT等于4,6,7,12或14,且所述L等于1或2,则所述M等于1或2;
若所述NT等于4,6,7,12或14,且所述L等于4或8,则所述M等于1。
结合第四方面,或者第四方面的第一种至第六种可能的实现方式,在第七种可能的实现方式中,所述DCI包括用于指示传输资源的信息;
所述发送单元还用于,在所述传输资源上与所述基站进行数据传输。
结合第四方面的第七种可能的实现方式,在第八种可能的实现方式中,所述传输资源不能够用于承载其他终端设备的DCI。
结合第四方面,或者第四方面的第一种至第八种可能的实现方式,在第九种可能的实现方式中,所述第i个时间单元包括至少一个数据符号,所述第 一信道资源在时域上位于所述第i个时间单元中的数据符号。
结合第四方面,或者第四方面的第一种至第八种可能的实现方式,在第十种可能的实现方式中,当所述第i个时间单元中包括PDCCH符号时,所述第一信道资源在时域上位于所述第i个时间单元中的PDCCH符号;
当所述第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
结合第四方面的第九种或者第十种可能的实现方式,在第十一种可能的实现方式中,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源包括X个RU,所述X个RU中的任意一RU在时域上占用1个符号,在频域上占用
Figure PCTCN2015092580-appb-000007
个子载波,其中,X为正整数。
结合第四方面的第十一种可能的实现方式,在第十二种可能的实现方式中,若Y大于或者等于X,所述第一信道资源在时域上位于所述第i个时间单元中的第一个数据符号,在频域上占用所述X个RU,其中,Y为可用带宽在频域上占用的RU数;
若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号的每个数据符号,所述第一信道资源在频域上占用所述
Figure PCTCN2015092580-appb-000008
个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数;
若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号中的前N-1个数据符号,所述第一信道资源在频域上占用W个RU,针对所述N个数据符号中的第N个数据符号,所述第一信道资源在频域上占用X-W*(N-1)个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数,所述W小于或等于所述Y,X-W*(N-1)小于或等于所述Y。
结合第四方面,或者第四方面的第一种至第十二种可能的实现方式,在第十三种可能的实现方式中,当所述第一信道资源在时域上位于所述第i个时 间单元中的数据符号时,所述第一信道资源为集中式信道资源,或者,分布式信道资源。
结合第四方面的第十三种可能的实现方式,在第十四种可能的实现方式中,所述DCI包括用于指示传输资源的信息;
若所述第一信道资源为集中式信道资源,所述传输资源在频域上占用至少一个集中式增强资源块组LERBG;
若所述第一信道资源为分布式信道资源,所述传输资源在频域上占用至少一个分布式增强资源块组DERBG。
结合第四方面的第二种至第七种可能的实现方式,在第十五种可能的实现方式中,若NT=2,且所述第i个时间单元为所述第一时间单元,所述第一信道资源为第一控制区域中的一个PDCCH,所述第一控制区域位于所述第一个slot中的前Nsym1个符号;
若NT=2,且所述第i个时间单元为所述第二时间单元,所述第一信道资源为第二控制区域中的一个PDCCH,所述第二控制区域位于所述第二个slot中的前Nsym2个符号;
其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
结合第四方面的第十五种可能的实现方式,在第十六种可能的实现方式中,还包括接收单元,用于接收所述基站发送的用于指示所述Nsym2取值的信令;
其中,所述信令为所述第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,所述第二个slot上的PCFICH承载的CFI,或者,高层信令。
本发明实施例中,提出一种发送下行DCI的方法:基站确定第一信道资源,第一信道资源在时域上位于一个子帧中的第i个时间单元,一个子帧包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数; 基站在第一信道资源上向终端设备发送DCI,在该方案中,承载DCI的第一信道资源在时域上位于一个子帧中的第i个时间单元,i为小于或者等于NT的正整数,也就是说,子帧中的每一个时间单元均有第一信道资源,因此,无论在哪一个时间单元上需要传输数据,都可以立即传输,不需要等到下一个子帧传输,因此,降低了调度时延。
例如,一个子帧包括7个时间单元,一个时间单元包括2个符号,在第6个符号需要传输数据,第6个符号位于第3个时间单元,由于第3个时间单元上有第一信道资源,因此,在第6个符号可以进行上行数据传输的调度,进而终端设备发送上行数据,不需要再等到下一个子帧进行上行数据传输的调度,因此,解决了现有技术中调度时延较长的缺陷。
附图说明
图1为现有技术中数据调度的示意图;
图2A为本发明实施例提供的发送下行DCI的一种流程图;
图2B为本发明实施例提供的一个子帧包括两个时间单元的示意图;
图2C为本发明实施例提供的一个子帧包括四个时间单元的示意图;
图2D为本发明实施例提供的LERBG和DERBG的示意图;
图3为本发明实施例提供的发送下行DCI的另一种流程图;
图4A为本发明实施例提供的基站的一种示意图;
图4B为本发明实施例提供的基站的另一种示意图;
图5A为本发明实施例提供的终端设备的一种示意图;
图5B为本发明实施例提供的终端设备的另一种示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明作进一步地详细描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在 没有做出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
为了便于理解对本发明实施例的理解,下面对本发明实施例涉及的基本概念进行介绍。
一、帧结构
本发明实施例中的一个无线帧(frame)包括10个子帧(subframe),每一个子帧的长度为1毫秒(ms),每个子帧均包括两个时隙(slot),每个slot为0.5ms。
每一个slot包括的符号的数量与子帧中CP(Cyclic Prefix,循环前缀)长度相关,如果CP为Normal(普通)CP,每个slot包括7个符号(symbol);如果CP为Extended(长)CP,每个slot包括6个符号。也就是说,子帧前面设置的是Normal CP时,每个子帧由14个符号组成,即每个子帧由序号分别为#0,#1,#2,#3,#4,#5,#6,#7,#8,#9,#10,#11,#12,#13的符号组成;子帧前面设置的是Extended CP时,每个子帧由12个符号组成,即每个子帧由序号分别为#0,#1,#2,#3,#4,#5,#6,#7,#8,#9,#10,#11的符号组成。
每一个slot中包括的符号可以有上行符号,也可以有下行符号,其中,上行符号称为SC-FDMA(Single Carrier-Frequency Division Multiple Access,单载波频分多址)符号,下行符号称为OFDM(Orthogonal Frequency Division Multiplexing,正交频分复用)符号。需要说明的是,若后续技术引入OFDMA(Orthogonal Frequency Division Multiple Access,正交频分多址)的上行多址方式,上行符号也可以称为OFDM符号。本发明实施例中不对上行符号和下行符号的形式做具体限定。
二、PDCCH及搜索空间
本发明实施例中提到的PDCCH可以是版本(Rel)-8定义的PDCCH,Rel-11定义的ePDCCH,以及未来演进的PDCCH。
当然,随着科技的发展,承载DCI的信道并不限定于PDCCH,只要能用 于向终端设备发送DCI即可。
搜索空间由一个或多个PDCCH组合而成,每个PDCCH均为一个候选PDCCH(PDCCH candidate),可用于承载DCI。简言之,搜索空间为候选PDCCH的集合。终端设备需要监听每个候选PDCCH,所以搜素空间也就是终端设备监听的PDCCH集合。由Rel-8定义的PDCCH组成的搜索空间称为PDCCH搜索空间,由Rel-11定义的ePDCCH组成的搜索空间称为ePDCCH搜索空间。
搜索空间包括CSS(Common Search Space,公共搜索空间)和UESS(UE Specific Search Space,用户设备特定搜索空间)两种类型。其中,CSS是小区内多个终端设备都要监听的搜索空间,UESS是小区内特定终端设备需要监听的搜索空间。
相应地,PDCCH UESS是由Rel-8定义的PDCCH组成的UESS,ePDCCH UESS是由Rel-11定义的ePDCCH组成的UESS。
三、聚合级别
本发明实施例中用于发送调度信息的PDCCH由L个CCE(Control Channel Element,控制信道单元)聚合而成,L为正整数,称为AL(Aggregation Level,聚合级别)。例如:对于Rel-8定义的PDCCH,L可以是1、2、4或8。又例如:对于Rel-11中定义的ePDCCH,L可以是1、2、4、8、16或32。
另外,本发明中,在数据符号上用于承载DCI的第一信道资源由L个DsCCE(Data-symbol Control Information Element,数据符号控制信息单元)聚合而成,L为正整数,称为AL。
四、数据传输模式
本发明实施例中的数据传输模式包括采用正常TTI的数据传输模式和采用短TTI的数据传输模式。基站配置数据传输模式后,可以向终端设备发送指示数据传输模式的信令,该信令为高层信令或物理层信令。终端设备接收该信令后确定数据传输模式。
正常TTI是指TTI的长度为1个子帧或1ms。其中,采用正常TTI传输的数据包称为“正常TTI数据包”。可选的,正常TTI数据包占用的时域资源可以不 是完整的1个子帧或1ms。
例如,一个下行子帧中的前1、2、3或4个符号可以用于传输PDCCH,因此,下行正常TTI数据包占用的时域资源可以不是一个完整的子帧。
又例如,一个上行子帧中的最后1个符号可以用于传输SRS(Sounding Reference Signal,信道探测参考信号),因此,上行正常TTI数据包占用的时域资源也可以不是一个完整的子帧。
短TTI是指TTI的长度小于1个子帧或1ms,其中,采用短TTI传输的数据包称为“短TTI数据包”。
下面结合说明书附图对本发明优选的实施方式进行详细说明,应当理解,此处所描述的优选实施例仅用于说明和解释本发明,并不用于限定本发明,并且在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。
下面结合附图对本发明实施例进行详细说明。
实施例一
参阅图2A所示,本发明实施例中,发送下行DCI的一种流程如下:
步骤200:基站确定第一信道资源,第一信道资源在时域上位于一个子帧中的第i个时间单元,一个子帧包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数;
步骤210:基站在第一信道资源上向终端设备发送DCI。
本发明实施例中,一个子帧也可以用1ms来替代,因此,步骤200也可以采用如下描述:
基站确定第一信道资源,第一信道资源在时域上位于1ms内的第i个时间单元,1ms内包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数。
本发明实施例中,可选的,NT为2、4、6、7、12,及14中的至少一种。
可选的,对于普通CP,NT为2、4、7或14;对于长CP,NT为2、4、6或12。
需要说明的是,一个子帧的时间长度或者1ms可以等于NT个时间单元的时间长度总和,或者,一个子帧的时间长度或者1ms也可以大于NT个时间单元的时间长度总和。
本发明实施例中,可选的,当NT=2时,一个子帧中包含的2个时间单元分别为第一时间单元和第二时间单元,第一时间单元位于一个子帧中的第一个slot,第二时间单元位于一个子帧中的第二个slot,如图2B所示;
当NT=4时,可选的,一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,第一时间单元位于第一符号集{#0,#1,#2,#3},第二时间单元位于第二符号集{#4,#5,#6},第三时间单元位于第三符号集{#7,#8,#9,#10},第四时间单元位于第四符号集{#11,#12,#13},如图2C所示。本发明实施例中,对于普通CP的情况,第一时间单元位于第一符号集{#0,#1,#2};第二时间单元位于第二符号集{#3,#4,#5,#6};第三时间单元位于第三符号集{#7,#8,#9},第四时间单元位于第四符号集{#10,#11,#12,#13}。
或者,对于长CP,NT=4,每三个连续符号为一个时间单元。或者,对于普通CP,NT=7,每两个连续符号为一个时间单元。或者,对于长CP,NT=6,每两个连续符号为一个时间单元。或者,对于普通CP,NT=14,每个符号为一个时间单元。或者,对于长CP,NT=12,每个符号为一个时间单元。
本发明实施例中,进一步的,基站确定第一信道资源之前,还需要确定聚合级别AL。
本发明实施例中,聚合级别的取值为正整数,例如1、2、4、8、16或32等数值。具体地,基站可以按如下操作确定第一信道资源的聚合级别:
基站可根据终端设备的信道状态确定AL。
例如,基站可根据终端设备的CSI(Channel State Information,信道状态信息)确定AL。当信道状态差的时候,选择高聚合级别,例如8;当信道状态好的时候,选择低聚合级别,例如1。
可选的,基站确定聚合级别AL在时长为T的时间内为L,L为正整数。相应地,终端设备可以确定AL在时长为T的时间内为L。由于聚合级别在一段时间内保持不变,所以终端设备在T内一旦检测到一次DCI,获知承载该DCI的信道资源的AL为L后,后面就只需要盲检测AL为L对应的候选信道资源,进而确定DCI了,降低了DCI的盲检测次数,因此,提高了终端的处理速度,并降低了终端的耗电量。
例如,时长为T的时间内基站发送4次DCI,终端设备在检测基站第一次发送的DCI时,因为不知道AL,所以需要检测所有AL对应的候选信道资源来确定DCI。当终端设备通过检测基站第一次发送的DCI,获知AL为L后,后面3次,终端设备就只需要检测AL为L对应的候选信道资源来确定DCI。
可选的,基站确定AL为L后,并向终端设备发送信令,该信令可用于指示第一信道资源的AL为L,L为正整数。这样,终端设备不需要每次盲检测所有AL对应的候选信道资源来获取DCI,降低了终端设备的处理复杂度。
本发明实施例中,基站确定第一信道资源时,可选的,可以采用如下方式:
基站确定M个候选信道资源,M个候选信道资源中的每个候选信道资源的AL均为L,M为正整数;
基站从M个候选信道资源中选择出一个候选信道资源作为第一信道资源。
本发明实施例中,当M=1时,直接将候选信道资源作为第一信道资源,当M大于1时,需要从候选信道资源中选择出第一信道资源。
例如,基站确定了3个候选信道资源,3个候选信道资源中的每个候选信道资源的AL均为L,基站从3个候选信道资源中选择出一个候选信道资源,并将选择出的候选信道资源作为第一信道资源。
本发明实施例中,基站从M个候选信道资源中选择出一个候选信道资源时,可选的,可以采用如下方式:
基站将检测到的第一个空闲的候选信道资源作为第一信道资源。
或者,也可以采用如下方式:
基站根据终端设备标识,从M个候选信道资源中选择出一个候选信道资源作为第一信道资源。
可选的,UE ID(UE Identifier,终端设备标识)可以是C-RNTI(Cell Radio Network Temporary Identifiers,小区无线网络临时标识)或SPS C-RNTI(Semi-Persistent Scheduling C-RNTI,半持续调度C-RNTI)。
例如,第一信道资源为M个候选信道资源中的第k个候选信道资源,其中k=F(nRNTI)。F(nRNTI)表示以nRNTI为参数的函数,nRNTI为UE ID。
例如,F(nRNTI)=nRNTI mod M。
这样,终端设备就不用盲检测M个AL为L候选信道资源。
本发明实施例中,M的取值与终端设备的DCI的盲检测次数有关。为了维持一个合理的盲检测次数,M的取值不能太大。M可以跟聚合级别相关,例如,聚合级别为1或2时,M等于4;聚合级别为4时,M等于2;聚合级别为8时,M等于1。又例如,聚合级别为1或2时,M等于2。
聚合级别为1或2,M等于2这种情况下,可选的,该2个聚合级别为1或2的候选信道资源可以分别位于可用带宽的上下边带。
聚合级别为4或8,M等于1这种情况下,该1个聚合级别为4或8的候选信道资源均位于可用带宽的上边带,或均位于下边带。可选的,该1个聚合级别为4的候选信道资源和该1个聚合级别为8的候选信道资源分别位于可用带宽的上下边带。
可选的,M的取值也可以跟NT相关。
需要说明的是,M是针对一个时间单元来说的,即一个时间单元上有M个聚合级别为L的候选信道资源。例如,若NT等于2,且L等于1或2,则M等于3;
若NT等于2,且L等于4或8,则M等于1;
若NT等于4,6,7,12或14,且L等于1或2,则M等于1或2;
若NT等于4,6,7,12或14,且L等于4或8,则M等于1。
本发明实施例中,DCI包括用于指示传输资源的信息。进一步的,基站在第一信道资源上向终端设备发送DCI之后,还包括如下操作:
基站在传输资源上与终端设备进行数据传输。
本发明实施例中,DCI指示的传输资源在时域上占用一个时间单元。可选的,当一个时间单元包括PDCCH符号时,资源分配信息指示的数据传输资源在时域上占用该一个时间单元内除PDCCH符号外的符号。
例如,资源分配信息指示的数据传输资源在时域上占用一个slot,或,2/3/4个符号。这样,该DCI可用于调度短TTI数据传输。
本发明实施例中,可选的,对于下行数据传输,基站在该DCI指示的传输资源上向终端设备发送下行数据包。其中,传输资源占用的时域资源位于第i个时间单元,即下行数据包和DCI位于同一个时间单元。
本发明实施例中,可选的,对于上行数据传输,基站在该DCI指示的传输资源上接收终端设备发送的上行数据包。其中,传输资源占用的时域资源位于第i+K个时间单元,即上行数据包占用的时间单元为DCI占用的第i个时间单元之后的第K个时间单元,其中K为大于或等于4的整数。
例如,NT为4,K为4,DCI位于子帧0上的第一个时间单元(i=1),那么传输资源占用的时域资源为子帧1上的第一个时间单元。
对于上行数据传输,有一种情况是终端设备在PUSCH上单独发送CSI,即终端设备在PUSCH上不发送承载UL-SCH(Uplink Shared Channel,上行共享信道)的传输块,只发送当前PUSCH上报模式的CIF(Control Information Feedback,控制信息反馈)。对于该情况,基站在该DCI指示的传输资源上接收终端设备发送的CSI。该情况下,传输资源占用的时域资源为一个子帧中的一个时间单元,例如,传输资源占用的时域资源为第i+K个时间单元。或者,可选的,传输资源占用的时域资源为一个子帧或1ms。例如,当(i+k)mod NT=1 时,传输资源占用的时域资源为第i+K个时间单元占用的一个子帧或1ms;当(i+k)mod NT>1时,传输资源占用的时域资源为第i+K个时间单元之后的第一个子帧或1ms。
例如,NT为4,K为4,DCI位于子帧0上的第一个时间单元(i=1),那么传输资源占用的时域资源为子帧1。例如,NT为4,K为4,DCI位于子帧0上的第三个时间单元,那么传输资源占用的时域资源为子帧2。
本发明实施例中,DCI还包括上行调度信息、下行调度信息、请求非周期CSI上报的信息中的至少一种。
上行调度信息或者下行调度信息包括用于指示传输资源的信息、MCS(Modulation and Coding Scheme,调制编码方案)、预编码、天线端口和层数(number of layers)中的至少一种信息。
进一步地,上行调度信息还可以包括指示上行参考信号的配置信息,例如,配置信息指示上行参考信号占用的时域资源、频域资源或码域资源。
下行调度信息还可以包括指示下行参考信号的配置信息,例如,配置信息指示下行参考信号的类型,或者,下行参考信号占用的时域资源、频域资源或码域资源。
可选的,对于下行数据传输,该DCI指示的传输资源不能够用于承载其他终端设备的DCI。也就是说,基站不在该传输资源上发送其他终端设备的DCI。需要说明的是,若第一信道资源位于该DCI指示的传输资源内时,那么该DCI指示的传输资源内除去第一信道资源后剩余的传输资源不用于承载其他终端设备的DCI。这样,终端设备在接收下行数据时,就知道分配给自己的数据传输资源上不会出现其他终端设备的DCI。假设没有该限制,终端设备不知道分配给自己的数据传输资源是否会出现其他终端设备的DCI,所以基站需要通过额外的DCI比特来通知终端设备;或者,基站总是预留出一些可能承载其他终端设备的DCI的传输资源,这些资源不能用于下行数据传输,所以增加了资源浪费。
本发明实施例中,可选的,第i个时间单元包括至少一个数据符号,第一信道资源在时域上位于第i个时间单元中的数据符号。
本发明实施例中,数据符号是指子帧中除去PDCCH符号外的其他符号,或者说,在一个子帧内,对应的序号与PDCCH符号的序号不相同的符号。Rel-8定义的PDCCH符号为用于传输PDCCH的符号。
其中,当下行系统带宽小于或者等于10个RB(Resource Block,资源块)时,在一个子帧内,PDCCH符号为该一个子帧的前2、3或4个符号,数据符号为该一个子帧中除去前2,3或4个符号外的其他符号;当下行系统带宽大于10个RB时,在一个子帧内,PDCCH符号为该一个子帧的前1,2或3个符号,数据符号为该一个子帧中除去前1,2或3个符号外的其他符号。
可选的,基站可通过PCFICH(Physical Control Format Indicator Channel,物理控制格式指示信道)承载的CFI(Control Format Indicator,控制格式指示)或高层信令通知终端设备PDCCH符号数或数据符号数。
本发明实施例中,可选的,基站根据第i个时间单元中是否包括PDCCH符号来确定第一信道资源。具体地,当第i个时间单元中包括PDCCH符号时,第一信道资源在时域上位于第i个时间单元中的PDCCH符号;当第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,第一信道资源在时域上位于第i个时间单元中的数据符号。
在这种方式下,当第一信道资源在时域上位于第i个时间单元中的PDCCH符号时,第一信道资源为UESS或CSS中的一个候选PDCCH。
其中,可选的,CSS由16个CCE组成,CSS包含4个聚合级别为4的候选PDCCH,CSS包含2个聚合级别为8的候选PDCCH。
其中,可选的,UESS为PDCCH UESS,UESS包含M1个聚合级别为1的候选PDCCH,UESS包含M2个聚合级别为2的候选PDCCH,UESS包含M4个聚合级别为4的候选PDCCH,UESS包含M8个聚合级别为8的候选PDCCH,其中,M1和M2为小于6的正整数,M4和M8为小于2的正整数。
本发明实施例中,可选的,当第一信道资源在时域上位于第i个时间单元 中的数据符号时,第一信道资源包括X个RU(Resource Unit,资源单元),X个RU中的任意一RU在时域上占用1个符号,在频域上占用
Figure PCTCN2015092580-appb-000009
个子载波,其中,X为正整数。
可选的,
Figure PCTCN2015092580-appb-000010
本发明实施例中,可选的,第一信道资源在时域上位于第i个时间单元中的第一个数据符号,在频域上占用X个RU。可选的,该方案仅适用于Y大于或者等于X的情况,其中,Y为可用带宽在频域上占用的RU数。
例如,X为6,第i个时间单元中的第一个数据符号上,第一信道资源在可用带宽的频域上占用6个RU。
本发明实施例中,可选的,第一信道资源在时域上位于第i个时间单元中的前N个数据符号,针对N个数据符号的每个数据符号,第一信道资源在频域上占用
Figure PCTCN2015092580-appb-000011
个RU,其中,N小于或等于第i个时间单元中包含的数据符号的总个数。可选的,该方案适用于Y小于X的情况。例如,X为12,N为2,针对2个数据符号中的每个数据符号,第一信道资源在频域上占用6个RU。
本发明实施例中,可选的,第一信道资源在时域上位于第i个时间单元中的前N个数据符号,针对N个数据符号中的前N-1个数据符号,第一信道资源在频域上占用W个RU,针对N个数据符号中的第N个数据符号,第一信道资源在频域上占用X-W*(N-1)个RU,其中,N小于或等于第i个时间单元中包含的数据符号的总个数,W小于或等于Y,X-W*(N-1)小于或等于Y。可选的,该方案适用于Y小于X的情况。
例如,X为24,Y为15,N为2,针对,2个数据符号中的第一个数据符号,第一信道资源在频域上占用了全部的15个RU,2个数据符号中的第二个数据符号,第一信道资源在频域上占用的是9个RU。
本发明实施例中,可选的,X=L*Q。其中,Q为正整数,可选的,Q为3,当L为1时,第一信道资源包括3个RU,当L为4时,第一信道资源包括12个RU。Q指示的是DsCCE(Data-symbol Control Information Element, 数据符号控制信息单元)包括的RU数,DsCCE为第一信道资源占用的最小资源。
本发明实施例中,可用带宽为系统带宽或短TTI数据传输可用带宽或特定带宽。短TTI数据传输可用带宽是指,短TTI数据传输可占用的频域带宽。
可选的,基站在确定短TTI数据传输可用带宽后,要向终端设备发送指示短TTI数据传输可用带宽的信令。
可选的,特定带宽是预定义的带宽,或者,基站配置的带宽。
本发明实施例中,可选的,当第一信道资源在时域上位于第i个时间单元中的数据符号时,第一信道资源为集中式信道资源,或者,分布式信道资源。当第一信道资源为集中式信道资源,第一信道资源在频域上是连续分布的;当第一信道资源为分布式信道资源,第一信道资源在频域上是非连续分布的。
为了获得频率分集增益,在信道状态差的时候,采用分布式信道资源,而在信道状态差的时候,会选择高聚合级别,所以基站可以确定高聚合级别的第一信道资源为分布式信道资源,这样,可以获得频率分集增益。例如,聚合级别为1或2的第一信道资源为集中式信道资源,聚合级别为4或8的第一信道资源为分布式信道资源。相应地,聚合级别为1或2的候选信道资源为集中式信道资源,聚合级别为4或8的候选信道资源为分布式信道资源。
本发明实施例中,可选的,DCI包括用于指示传输资源的信息。
本发明实施例中,可选的,传输资源在频域上占用至少一个ERBG(Enhanced Resource Block Group,增强的资源块组)。其中,任意一个ERBG在频域上占用P个RB,其中,P为大于1的整数。可选的,ERBG包括LERBG(Localized ERBG,集中式ERBG)和DERBG(Distributed ERBG,分布式ERBG)。一个LERBG在频域上占用连续的子载波,一个DERBG在频域上占用非连续的子载波。或者说,一个LERBG在频域上占用P个连续的RB,一个DERBG在频域上占用P个非连续的RB。
例如,系统带宽为20MHz(包括100个RB)时,假设P为25,那么整个系统带宽上包括4个ERBG,对应的LERBG和DERBG,如图2D所示。
若第一信道资源为集中式信道资源,传输资源在频域上占用至少一个LERBG。需要说明的是,当传输资源在频域上占用两个或两个以上LERBG时,该两个或两个以上LERBG在频域上可以是连续分布或者非连续分布。
若第一信道资源为分布式信道资源,传输资源在频域上占用至少一个DERBG。也就是说,对于承载DCI的第一信道资源为分布式信道资源时,该DCI指示的传输资源占用非连续的频域资源。
本发明实施例中,可选的,若NT=2,且第i个时间单元为第一时间单元,第一信道资源为第一控制区域中的一个PDCCH,第一控制区域位于第一个slot中的前Nsym1个符号;
若NT=2,且第i个时间单元为第二时间单元,第一信道资源为第二控制区域中的一个PDCCH,第二控制区域位于第二个slot中的前Nsym2个符号;
其中,Nsym1为1、2、3或4,Nsym2为整数或者正整数。可选的,Nsym2为1,2或3,可选的,Nsym2为0,1,2或3,或者,Nsym2为1,2或3。当Nsym2为0时,说明第二时间单元上没有第二控制区域。
可选的,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。或者,第二控制区域在频域上位于可用带宽内,这样,第二控制区域等于或小于可用带宽。需要说明的是,当第一控制区域占用整个系统带宽时,如果第二控制区域也占用整个系统带宽,就会影响老版本终端设备的数据传输。因为老版本终端设备不知道第二控制区域的存在,为了避开第二控制区域,基站不能在同一个载波同一个子帧调度老版本终端设备和支持短TTI传输的终端设备。为了不影响老版本终端设备的数据传输,可选的,第二控制区域占用的频域资源小于第一控制区域占用的频域资源。这样,基站可以在第二控制区域以外的频带调度老版本终端设备。
可选的,第一控制区域为LTE Rel-8定义的控制区域,该第一控制区域中的任一个PDCCH为LTE Rel-8定义的PDCCH。第一信道资源为CSS或UESS中的一个PDCCH,其中,CSS和/或UESS位于第一控制区域。
若NT=2,且第i个时间单元为第二时间单元时,第一信道资源为feCSS(further enhanced CSS,进一步增强的CSS)或feUESS(further enhanced UESS,进一步增强的UESS)中的一个PDCCH,其中,feUESS和/或feCSS位于第二控制区域。
为了均衡终端设备在2个时间单元上的盲检测次数,可选的,在第一时间单元或第二时间单元,UESS包含3个聚合级别为1或2的候选PDCCH;UESS包含1个聚合级别为4或8的候选PDCCH。
本发明实施例中,进一步的,基站确定第一信道资源之前,还包括如下操作:
基站向终端设备发送指示Nsym2取值的信令;
其中,信令为第一个slot上的PCFICH(Physical Control Format Indicator Channel,物理控制格式指示信道)承载的CFI(Control Format Indicator,控制格式指示),或者,第二个slot上的PCFICH承载的CFI,或者,第一个slot上的PDCCH承载的DCI,或者,高层信令。
可选的,基站配置Nsym1和Nsym2相等,进一步地,基站向终端设备发送承载于第一个slot上的PCFICH的CFI,该CFI指示Nsym1和Nsym2的取值。这样,一个子帧上只有一个PCFICH,和现有系统相比,没有增加额外PCIFICH开销。
可选的,基站配置Nsym2=F(Nsym1),其中,F(Nsym1)表示以Nsym1为参数的函数,进一步地,基站向终端设备发送承载于第一个slot上的PCFICH的CFI,该CFI指示Nsym1的取值。终端设备可以根据Nsym2=F(Nsym1)计算出Nsym2的取值,所以该CFI也是隐式指示了Nsym2的取值。可选的,F(Nsym1)=k×Nsym1或者F(Nsym1)=min(|k×Nsym1|,Nmax),其中,k为正数,
Figure PCTCN2015092580-appb-000012
表示向上取整,Nmax为1,2,3或4。这样,一个子帧上只有一个PCFICH,和现有系统相比,没有增加额外PCIFICH开销。
可选的,基站配置Nsym2,进一步地,基站向终端设备发送承载于第二个 slot上的PCFICH的CFI,该CFI指示Nsym2的取值。这样,基站可以根据需要单独配置第一个时间单元和第二个时间单元上的PDCCH符号数,可以相同,也可以不相同,提高了子帧的灵活性。
在该方案中,承载DCI的第一信道资源在时域上位于一个子帧中的第i个时间单元,i为小于或者等于NT的正整数,也就是说,子帧中的每一个时间单元均有第一信道资源,因此,无论在哪一个时间单元上需要传输数据,都可以立即传输,不需要等到下一个子帧传输,因此,降低了调度时延。
实施例二
参阅图3所示,本发明实施例中,发送下行DCI的另一种流程如下:
步骤300:终端设备检测第一信道资源,第一信道资源在时域上位于一个子帧中的第i个时间单元,一个子帧包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数;
步骤310:终端设备解译基站发送的下行控制信息DCI,DCI承载于第一信道资源。
本发明实施例中,一个子帧也可以用1ms来替代看,因此,步骤300也可以采用如下描述:
终端设备检测第一信道资源,第一信道资源在时域上位于1ms内的第i个时间单元,1ms内包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数。
本发明实施例中,可选的,NT为2、4、6、7、12,及14中的至少一种。
可选的,对于普通CP,NT为2、4、7或14;对于长CP,NT为2、4、6或12。
需要说明的是,一个子帧的时间长度或者1ms可以等于NT个时间单元的时间长度总和,或者,一个子帧的时间长度或者1ms也可以大于NT个时间单元的时间长度总和。
本发明实施例中,可选的,当NT=2时,一个子帧中包含的2个时间单元 分别为第一时间单元和第二时间单元,第一时间单元位于一个子帧中的第一个slot,第二时间单元位于一个子帧中的第二个slot,如图2B所示。
当NT=4时,一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,第一时间单元位于第一符号集{#0,#1,#2,#3},第二时间单元位于第二符号集{#4,#5,#6},第三时间单元位于第三符号集{#7,#8,#9,#10},第四时间单元位于第四符号集{#11,#12,#13},如图2C所示。
本发明实施例中,对于普通CP的情况,第一时间单元位于第一符号集{#0,#1,#2};第二时间单元位于第二符号集{#3,#4,#5,#6};第三时间单元位于第三符号集{#7,#8,#9},第四时间单元位于第四符号集{#10,#11,#12,#13}。
本发明实施例中,对于长CP,NT=4,每三个连续符号为一个时间单元。或者,对于普通CP,NT=7,每两个连续符号为一个时间单元。或者,对于长CP,NT=6,每两个连续符号为一个时间单元。或者,对于普通CP,NT=14,每个符号为一个时间单元。或者,对于长CP,NT=12,每个符号为一个时间单元。
本发明实施例中,进一步的,终端设备检测第一信道资源之前,还包括如下操作:
终端设备确定AL在时长为T的时间内为L,L为正整数。
由于AL在一段时间内保持不变,所以终端设备在T内一旦检测到一次DCI,获知承载该DCI的信道资源的AL为L后,后面就只需要盲检测AL为L对应的候选信道资源来确定DCI,降低了DCI的盲检测次数,因此,提高了终端的处理速度,并降低了终端的耗电量
例如,时长为T的时间内基站发送4次DCI,终端设备在检测基站第一次发送的DCI时,因为不知道AL,所以需要检测所有AL对应的候选信道资源来确定DCI。当终端设备通过检测基站第一次发送的DCI,获知AL为L 后,后面3次,终端设备就只需要检测AL为L对应的候选信道资源来确定DCI。
本发明实施例中,进一步的,终端设备检测第一信道资源之前,还包括如下操作:
终端设备接收基站发送的信令,并根据信令确定AL为L,信令用于指示第一信道资源的AL为L,L为正整数。
这样,终端设备不需要每次盲检测所有AL对应的候选信道资源来获取DCI,降低了终端设备的处理复杂度。
本发明实施例中,聚合级别的取值为正整数,例如1、2、4、8、16或32等数值。
本发明实施例中,终端设备检测第一信道资源时,可选的,可以采用如下方式:
终端设备确定M个候选信道资源,M个候选信道资源中的每个候选信道资源的AL均为L,M为正整数;
终端设备从M个候选信道资源中检测出一个候选信道资源为第一信道资源。
本发明实施例中,终端设备从M个候选信道资源中检测出一个候选信道资源为第一信道资源时,可选的,可以采用如下方式:
终端设备根据终端设备标识,从M个候选信道资源中检测出一个候选信道资源作为第一信道资源。
例如,终端设备确定了3个候选信道资源,3个候选信道资源中的每个候选信道资源的AL均为L,终端设备从3个候选信道资源中检测出一个候选信道资源,并将检测出的候选信道资源作为第一信道资源。
可选的,UE ID可以是C-RNTI或SPS C-RNTI。
例如,第一信道资源为M个候选信道资源中的第k个候选信道资源,其中k=F(nRNTI),F(nRNTI)表示以nRNTI为参数的函数,nRNTI为UE ID,例如, F(nRNTI)=nRNTI mod M。
这样,终端设备就不用盲检测M个聚合级别为L候选信道资源。
本发明实施例中,M的取值与终端设备的DCI的盲检测次数有关。为了维持一个合理的盲检测次数,M的取值不能太大。M可以跟聚合级别相关,例如,聚合级别为1或2时,M等于4;聚合级别为4时,M等于2;聚合级别为8时,M等于1。又例如,聚合级别为1或2时,M等于2。
聚合级别为1或2,M等于2这种情况下,可选的,该2个聚合级别为1或2的候选信道资源可以分别位于可用带宽的上下边带。
聚合级别为4或8,M等于1这种情况下,该1个聚合级别为4或8的候选信道资源均位于可用带宽的上边带,或均位于下边带。可选的,该1个聚合级别为4的候选信道资源和该1个聚合级别为8的候选信道资源分别位于可用带宽的上下边带。
本发明实施例中,可选的,M的取值也可以跟NT相关。
需要说明的是,M是针对一个时间单元来说的,即一个时间单元上有M个聚合级别为L的候选信道资源。
例如,若NT等于2,且L等于1或2,则M等于3;
若NT等于2,且L等于4或8,则M等于1;
若NT等于4,6,7,12或14,且L等于1或2,则M等于1或2;
若NT等于4,6,7,12或14,且L等于4或8,则M等于1。
本发明实施例中,可选的,DCI包括用于指示传输资源的信息;
终端设备解译基站发送的DCI之后,还包括如下操作:
终端设备在传输资源上与基站进行数据传输。
本发明实施例中,DCI指示的传输资源在时域上占用一个时间单元。可选的,当一个时间单元包括PDCCH符号时,资源分配信息指示的数据传输资源在时域上占用该一个时间单元内除PDCCH符号外的符号。
例如,资源分配信息指示的数据传输资源在时域上占用一个slot,或,2/3/4 个符号。这样,该DCI可用于调度短TTI数据传输。
本发明实施例中,可选的,对于下行数据传输,终端设备在该DCI指示的传输资源上接收基站发送的下行数据包。其中,传输资源占用的时域资源位于第i个时间单元,即下行数据包和DCI位于同一个时间单元。
本发明实施例中,可选的,对于上行数据传输,终端设备在该DCI指示的传输资源上向基站发送上行数据包。其中,传输资源占用的时域资源位于第i+K个时间单元,即上行数据包占用的时间单元为DCI占用的第i个时间单元之后的第K个时间单元,其中K为大于或等于4的整数。
例如,NT为4,K为4,DCI位于子帧0上的第一个时间单元(i=1),那么传输资源占用的时域资源为子帧1上的第一个时间单元。
对于上行数据传输,有一种情况是终端设备在PUSCH上单独发送CSI,即终端设备在PUSCH上不发送承载UL-SCH的传输块,只发送当前PUSCH上报模式的CIF。对于该情况,终端设备在该DCI指示的传输资源上向基站发送CSI。该情况下,传输资源占用的时域资源为一个子帧中的一个时间单元,例如,传输资源占用的时域资源为第i+K个时间单元。或者,可选的,传输资源占用的时域资源为一个子帧或1ms。例如,当(i+k)mod NT=1时,传输资源占用的时域资源为第i+K个时间单元占用的一个子帧或1ms;当(i+k)mod NT>1时,传输资源占用的时域资源为第i+K个时间单元之后的第一个子帧或1ms。
例如,NT为4,K为4,DCI位于子帧0上的第一个时间单元(i=1),那么传输资源占用的时域资源为子帧1。例如,NT为4,K为4,DCI位于子帧0上的第三个时间单元,那么传输资源占用的时域资源为子帧2。
本发明实施例中,DCI还包括上行调度信息、下行调度信息、请求非周期CSI上报的信息中的至少一种。
上行调度信息或者下行调度信息包括用于指示传输资源的信息、MCS、预编码、天线端口和层数中的至少一种信息。
进一步地,上行调度信息还可以包括指示上行参考信号的配置信息,例 如,配置信息指示上行参考信号占用的时域资源、频域资源或码域资源。
下行调度信息还可以包括指示下行参考信号的配置信息,例如,配置信息指示下行参考信号的类型,或者,下行参考信号占用的时域资源、频域资源或码域资源。
本发明实施例中,可选的,传输资源不能够用于承载其他终端设备的DCI。也就是说,基站不在该传输资源上发送其他终端设备的DCI。需要说明的是,若第一信道资源位于该DCI指示的传输资源内时,那么该DCI指示的传输资源内除去第一信道资源后剩余的传输资源不用于承载其他终端设备的DCI。
这样,终端设备在接收下行数据时,就知道分配给自己的数据传输资源上不会出现其他终端设备的DCI。假设没有该限制,终端设备不知道分配给自己的数据传输资源是否会出现其他终端设备的DCI,所以基站需要通过额外的DCI比特来通知终端设备;或者,基站总是预留出一些可能承载其他终端设备的DCI的传输资源,这些资源不能用于下行数据传输,所以增加了资源浪费。
本发明实施例中,可选的,第i个时间单元包括至少一个数据符号,第一信道资源在时域上位于第i个时间单元中的数据符号。
本发明实施例中,数据符号是指子帧中除去PDCCH符号外的其他符号,或者说,在一个子帧内,对应的序号与PDCCH符号的序号不相同的符号。Rel-8定义的PDCCH符号为用于传输PDCCH的符号。
其中,当下行系统带宽小于或者等于10个RB时,在一个子帧内,PDCCH符号为该一个子帧的前2、3或4个符号,数据符号为该一个子帧中除去前2,3或4个符号外的其他符号;当下行系统带宽大于10个RB时,在一个子帧内,PDCCH符号为该一个子帧的前1,2或3个符号,数据符号为该一个子帧中除去前1,2或3个符号外的其他符号。
可选的,基站可通过PCFICH承载的CFI或高层信令通知终端设备PDCCH符号数或数据符号数。
本发明实施例中,可选的,当第i个时间单元中包括PDCCH符号时,第 一信道资源在时域上位于第i个时间单元中的PDCCH符号;
当第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,第一信道资源在时域上位于第i个时间单元中的数据符号。
在这种方式下,当第一信道资源在时域上位于第i个时间单元中的PDCCH符号时,第一信道资源为UESS或CSS中的一个候选PDCCH。
其中,可选的,CSS由16个CCE组成,CSS包含4个聚合级别为4的候选PDCCH,CSS包含2个聚合级别为8的候选PDCCH。
其中,可选的,UESS为PDCCH UESS,UESS包含M1个聚合级别为1的候选PDCCH,UESS包含M2个聚合级别为2的候选PDCCH,UESS包含M4个聚合级别为4的候选PDCCH,UESS包含M8个聚合级别为8的候选PDCCH,其中,M1和M2为小于6的正整数,M4和M8为小于2的正整数。
本发明实施例中,可选的,当第一信道资源在时域上位于第i个时间单元中的数据符号时,第一信道资源包括X个RU,X个RU中的任意一RU在时域上占用1个符号,在频域上占用
Figure PCTCN2015092580-appb-000013
个子载波,其中,X为正整数。
可选的,
Figure PCTCN2015092580-appb-000014
本发明实施例中,可选的,第一信道资源在时域上位于第i个时间单元中的第一个数据符号,在频域上占用X个RU,可选的,该方案仅适用于Y大于或者等于X的情况,其中,Y为可用带宽在频域上占用的RU数;
例如,X为6,第i个时间单元中的第一个数据符号上,第一信道资源在可用带宽的频域上占用6个RU。
本发明实施例中,可选的,第一信道资源在时域上位于第i个时间单元中的前N个数据符号,针对N个数据符号的每个数据符号,第一信道资源在频域上占用
Figure PCTCN2015092580-appb-000015
个RU,N小于或等于第i个时间单元中包含的数据符号的总个数。可选的,该方案适用于Y小于X的情况。例如,X为12,N为2,针对2个数据符号中的每个数据符号,第一信道资源在频域上占用6个RU。
本发明实施例中,可选的,第一信道资源在时域上位于第i个时间单元中 的前N个数据符号,针对N个数据符号中的前N-1个数据符号,第一信道资源在频域上占用W个RU,针对N个数据符号中的第N个数据符号,第一信道资源在频域上占用X-W*(N-1)个RU,N小于或等于第i个时间单元中包含的数据符号的总个数,W小于或等于Y,X-W*(N-1)小于或等于Y。可选的,该方案适用于Y小于X的情况。
例如,X为24,Y为15,N为2,针对,2个数据符号中的第一个数据符号,第一信道资源在频域上占用了全部的15个RU,2个数据符号中的第二个数据符号,第一信道资源在频域上占用的是9个RU。
本发明实施例中,可选的,X=L*Q。其中,Q为正整数,可选的,Q为3,当L为1时,第一信道资源包括3个RU,当L为4时,第一信道资源包括12个RU。Q指示的是DsCCE包括的RU数,DsCCE为第一信道资源占用的最小资源。
本发明实施例中,可用带宽为系统带宽或短TTI数据传输可用带宽或特定带宽。短TTI数据传输可用带宽是指,短TTI数据传输可占用的频域带宽。
可选的,基站在确定短TTI数据传输可用带宽后,要向终端设备发送指示短TTI数据传输可用带宽的信令。
可选的,特定带宽是预定义的带宽,或者,基站配置的带宽。
本发明实施例中,可选的,当第一信道资源在时域上位于第i个时间单元中的数据符号时,第一信道资源为集中式信道资源,或者,分布式信道资源。
当第一信道资源为集中式信道资源,第一信道资源在频域上是连续分布的;当第一信道资源为分布式信道资源,第一信道资源在频域上是非连续分布的。
为了获得频率分集增益,在信道状态差的时候,采用分布式信道资源,而在信道状态差的时候,会选择高聚合级别,所以高聚合级别的第一信道资源为分布式信道资源,这样,可以获得频率分集增益。例如,聚合级别为1或2的第一信道资源为集中式信道资源,聚合级别为4或8的第一信道资源为分布式信道资源。相应地,聚合级别为1或2的候选信道资源为集中式信 道资源,聚合级别为4或8的候选信道资源为分布式信道资源。
本发明实施例中,可选的,DCI包括用于指示传输资源的信息。
本发明实施例中,可选的,若第一信道资源为集中式信道资源,传输资源在频域上占用至少一个LERBG;
若第一信道资源为分布式信道资源,传输资源在频域上占用至少一个DERBG。
其中,任意一个ERBG在频域上占用P个RB,其中,P为大于1的整数。可选的,ERBG包括LERBG和DERBG。一个LERBG在频域上占用连续的子载波,一个DERBG在频域上占用非连续的子载波。或者说,一个LERBG在频域上占用P个连续的RB,一个DERBG在频域上占用P个非连续的RB。
例如,系统带宽为20MHz(包括100个RB)时,假设P为25,那么整个系统带宽上包括4个ERBG,对应的LERBG和DERBG,如图2D所示。
若第一信道资源为集中式信道资源,传输资源在频域上占用至少一个LERBG。需要说明的是,当传输资源在频域上占用两个或两个以上LERBG时,该两个或两个以上LERBG在频域上可以是连续分布或者非连续分布。
若第一信道资源为分布式信道资源,传输资源在频域上占用至少一个DERBG。也就是说,对于承载DCI的第一信道资源为分布式信道资源时,该DCI指示的传输资源占用非连续的频域资源。
本发明实施例中,可选的,若NT=2,且第i个时间单元为第一时间单元,第一信道资源为第一控制区域中的一个PDCCH,第一控制区域位于第一个slot中的前Nsym1个符号;
若NT=2,且第i个时间单元为第二时间单元,第一信道资源为第二控制区域中的一个PDCCH,第二控制区域位于第二个slot中的前Nsym2个符号;
其中,Nsym1为1,2,3或4,Nsym2为正整数或者正整数,可选的,Nsym2为1,2或3,可选的,Nsym2为0,1,2或3,或者,Nsym2为1,2或3。当Nsym2为0时,说明第二时间单元上没有第二控制区域。
可选的,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。或者,第二控制区域在频域上位于可用带宽内,这样,第二控制区域等于或小于可用带宽。需要说明的是,当第一控制区域占用整个系统带宽时,如果第二控制区域也占用整个系统带宽,就会影响老版本终端设备的数据传输。因为老版本终端设备不知道第二控制区域的存在,为了避开第二控制区域,基站不能在同一个载波同一个子帧调度老版本终端设备和支持短TTI传输的终端设备。为了不影响老版本终端设备的数据传输,可选的,第二控制区域占用的频域资源小于第一控制区域占用的频域资源。这样,基站可以在第二控制区域以外的频带调度老版本终端设备。
可选的,第一控制区域为LTE Rel-8定义的控制区域,该第一控制区域中的任一个PDCCH为LTE Rel-8定义的PDCCH。第一信道资源为CSS或UESS中的一个PDCCH,其中,CSS和/或UESS位于第一控制区域。
若NT=2,且第i个时间单元为第二时间单元时,第一信道资源为feCSS或feUESS中的一个PDCCH,其中,feUESS和/或feCSS位于第二控制区域。
为了均衡终端设备在2个时间单元上的盲检测次数,可选的,在第一时间单元或第二时间单元,UESS包含3个聚合级别为1或2的候选PDCCH;UESS包含1个聚合级别为4或8的候选PDCCH。
本发明实施例中,进一步的,终端设备检测第一信道资源之前,还包括如下操作:
终端设备接收基站发送的用于指示Nsym2取值的信令;
其中,信令为第一个slot上的PCFICH承载的CFI,或者,第二个slot上的PCFICH承载的CFI,或者,第一个slot上的PDCCH承载的DCI,或者,高层信令。
可选的,Nsym1和Nsym2相等,进一步地,终端设备接收基站发送的承载于第一个slot上的PCFICH的CFI,该CFI指示Nsym1和Nsym2的取值。这样,一个子帧上只有一个PCFICH,和现有系统相比,没有增加额外PCIFICH开销。
可选的,Nsym2=F(Nsym1),其中,F(Nsym1)表示以Nsym1为参数的函数,进一步地,终端设备接收基站发送的承载于第一个slot上的PCFICH的CFI,该CFI指示Nsym1的取值。终端设备可以根据Nsym2=F(Nsym1)计算出Nsym2的取值,所以该CFI也是隐式指示了Nsym2的取值。
可选的,F(Nsym1)=k×Nsym1或者F(Nsym1)=min(|k×Nsym1|,Nmax),其中,k为正数,
Figure PCTCN2015092580-appb-000016
表示向上取整,Nmax为1,2,3或4。这样,一个子帧上只有一个PCFICH,和现有系统相比,没有增加额外PCIFICH开销。
可选的,基站配置Nsym2,进一步地,终端设备接收基站发送的承载于第二个slot上的PCFICH的CFI,该CFI指示Nsym2的取值。这样,基站可以根据需要单独配置第一个时间单元和第二个时间单元上的PDCCH符号数,可以相同,也可以不相同,提高了子帧的灵活性。
在该方案中,承载DCI的第一信道资源在时域上位于一个子帧中的第i个时间单元,i为小于或者等于NT的正整数,也就是说,子帧中的每一个时间单元均有第一信道资源,因此,无论在哪一个时间单元上需要传输数据,都可以立即传输,不需要等到下一个子帧传输,因此,降低了调度时延。
实施例三
参阅图4A所示,本发明实施例中,提出一种基站,该基站包括处理单元40、发送单元41,其中:
处理单元40,用于确定第一信道资源,第一信道资源在时域上位于一个子帧中的第i个时间单元,一个子帧包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数;
发送单元41,用于在第一信道资源上向终端设备发送下行控制信息DCI。
本发明实施例中,可选的,NT为2、4、6、7、12,及14中的至少一种。
本发明实施例中,可选的,当NT=2时,一个子帧中包含的36个时间单元分别为第一时间单元和第二时间单元,第一时间单元位于一个子帧中的第一个slot,第二时间单元位于一个子帧中的第二个slot;
当NT=4时,一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,第一时间单元位于第一符号集{#0,#1,#2,#3},第二时间单元位于第二符号集{#4,#5,#6},第三时间单元位于第三符号集{#7,#8,#9,#10},第四时间单元位于第四符号集{#11,#12,#13}。
本发明实施例中,进一步的,处理单元40还用于,确定聚合级别AL在时长为T的时间内为L,L为正整数;或者,确定AL为L,并向终端设备发送信令,信令用于指示第一信道资源的AL为L,L为正整数。
本发明实施例中,可选的,处理单元40确定第一信道资源时,具体为:
确定M个候选信道资源,M个候选信道资源中的每个候选信道资源的AL均为L,M为正整数;
从M个候选信道资源中选择出一个候选信道资源作为第一信道资源。
本发明实施例中,可选的,处理单元40从M个候选信道资源中选择出一个候选信道资源作为第一信道资源时,具体为:
根据终端设备标识,从M个候选信道资源中选择出一个候选信道资源作为第一信道资源。
本发明实施例中,可选的,若NT等于2,且L等于1或2,则M等于3;
若NT等于2,且L等于4或8,则M等于1;
若NT等于4,6,7,12或14,且L等于1或2,则M等于1或2;
若NT等于4,6,7,12或14,且L等于4或8,则M等于1。
本发明实施例中,可选的,DCI包括用于指示传输资源的信息;
发送单元41还用于,在传输资源上与终端设备进行数据传输。
本发明实施例中,可选的,传输资源不能够用于承载其他终端设备的DCI。
本发明实施例中,可选的,第i个时间单元包括至少一个数据符号,第一信道资源在时域上位于第i个时间单元中的数据符号。
本发明实施例中,可选的,当第i个时间单元中包括PDCCH符号时,第一信道资源在时域上位于第i个时间单元中的PDCCH符号;
当第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,第一信道资源在时域上位于第i个时间单元中的数据符号。
本发明实施例中,可选的,当第一信道资源在时域上位于第i个时间单元中的数据符号时,第一信道资源包括X个RU,X个RU中的任意一RU在时域上占用1个符号,在频域上占用
Figure PCTCN2015092580-appb-000017
个子载波,其中,X为正整数。
本发明实施例中,可选的,若Y大于或者等于X,第一信道资源在时域上位于第i个时间单元中的第一个数据符号,在频域上占用X个RU,其中,Y为可用带宽在频域上占用的RU数;
若Y小于X,第一信道资源在时域上位于第i个时间单元中的前N个数据符号,针对N个数据符号的每个数据符号,第一信道资源在频域上占用NX个RU,N小于或等于第i个时间单元中包含的数据符号的总个数;
若Y小于X,第一信道资源在时域上位于第i个时间单元中的前N个数据符号,针对N个数据符号中的前N-1个数据符号,第一信道资源在频域上占用W个RU,针对N个数据符号中的第N个数据符号,第一信道资源在频域上占用X-W*(N-1)个RU,N小于或等于第i个时间单元中包含的数据符号的总个数,W小于或等于Y,X-W*(N-1)小于或等于Y。
本发明实施例中,可选的,当第一信道资源在时域上位于第i个时间单元中的数据符号时,第一信道资源为集中式信道资源,或者,分布式信道资源。
本发明实施例中,可选的,DCI包括用于指示传输资源的信息;
若第一信道资源为集中式信道资源,传输资源在频域上占用至少一个集中式增强资源块组LERBG;
若第一信道资源为分布式信道资源,传输资源在频域上占用至少一个分布式增强资源块组DERBG。
本发明实施例中,可选的,若NT=2,且第i个时间单元为第一时间单元,第一信道资源为第一控制区域中的一个PDCCH,第一控制区域位于第一个slot中的前Nsym1个符号;
若NT=2,且第i个时间单元为第二时间单元,第一信道资源为第二控制区域中的一个PDCCH,第二控制区域位于第二个slot中的前Nsym2个符号;
其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
本发明实施例中,进一步的,发送单元41还用于,向终端设备发送指示Nsym2取值的信令;
其中,信令为第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,第二个slot上的PCFICH承载的CFI,或者,第一个slot上的PDCCH承载的DCI,或者,高层信令。参阅图4B所示,本发明实施例中,提出一种基站的示意图,该基站包括处理器400、发送器410,其中:
处理器400,用于确定第一信道资源,第一信道资源在时域上位于一个子帧中的第i个时间单元,一个子帧包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数;
发送器410,用于在第一信道资源上向终端设备发送下行控制信息DCI。
需要说明的是,处理器400还用于执行处理单元40所执行的其他操作,发送器410还用于执行发送单元41所执行的其他操作。
需要说明的是,图4A和图4B所描述的基站可以执行实施例一中的所有步骤,也就是说,图4A和图4B所描述的基站可以执行的步骤即使在实施例三中没有具体细化或者扩展等操作,但是,这些步骤在实施例一中有具体细化或者扩展等操作的话,那这些步骤的具体细化或者扩展等操作也同样适用于图4A和图4B所描述的基站,图4A和图4B所描述的基站可以根据实施例一的具体细化和扩展对相应的步骤进行具体细化和扩展。
同理,实施例一中的所有静态限定的描述也同样适用于图4A和图4B所描述的基站。
图4A和图4B所提供的基站确定的第一信道资源在时域上位于一个子帧中的第i个时间单元,i为小于或者等于NT的正整数,也就是说,子帧中的每 一个时间单元均有第一信道资源,因此,无论在哪一个时间单元上需要传输数据,图4A和图4B所提供的基站都可以立即传输,不需要等到下一个子帧传输,因此,图4A和图4B所提供的基站降低了调度时延。
实施例四
参阅图5A所示,本发明实施例中,提出一种终端设备,该终端设备包括处理单元50、发送单元51,其中:
处理单元50,用于检测第一信道资源,第一信道资源在时域上位于一个子帧中的第i个时间单元,一个子帧包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数;
发送单元51,用于解译基站发送的下行控制信息DCI,DCI承载于第一信道资源。
本发明实施例中,可选的,NT为2、4、6、7、12,及14中的至少一种。
本发明实施例中,可选的,当NT=2时,一个子帧中包含的2个时间单元分别为第一时间单元和第二时间单元,第一时间单元位于一个子帧中的第一个slot,第二时间单元位于一个子帧中的第二个slot;
当NT=4时,一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,第一时间单元位于第一符号集{#0,#1,#2,#3},第二时间单元位于第二符号集{#4,#5,#6},第三时间单元位于第三符号集{#7,#8,#9,#10},第四时间单元位于第四符号集{#11,#12,#13}。
本发明实施例中,进一步的,处理单元50还用于,确定聚合级别AL在时长为T的时间内为L,L为正整数;或者,
还包括接收单元52,用于接收基站发送的信令;
处理单元50还用于,根据接收单元接收到的信令确定AL为L,信令用于指示第一信道资源的AL为L,L为正整数。
本发明实施例中,可选的,处理单元50检测第一信道资源时,具体为:
确定M个候选信道资源,M个候选信道资源中的每个候选信道资源的 AL均为L,M为正整数;
从M个候选信道资源中检测出一个候选信道资源为第一信道资源。
本发明实施例中,可选的,处理单元50从M个候选信道资源中检测出一个候选信道资源为第一信道资源时,具体为:
根据终端设备标识,从M个候选信道资源中检测出一个候选信道资源作为第一信道资源。
本发明实施例中,可选的,若NT等于2,且L等于1或2,则M等于3;
若NT等于2,且L等于4或8,则M等于1;
若NT等于4,6,7,12或14,且L等于1或2,则M等于1或2;
若NT等于4,6,7,12或14,且L等于4或8,则M等于1。
本发明实施例中,可选的,DCI包括用于指示传输资源的信息;
发送单元51还用于,在传输资源上与基站进行数据传输。
本发明实施例中,可选的,传输资源不能够用于承载其他终端设备的DCI。
本发明实施例中,可选的,第i个时间单元包括至少一个数据符号,第一信道资源在时域上位于第i个时间单元中的数据符号。
本发明实施例中,可选的,当第i个时间单元中包括PDCCH符号时,第一信道资源在时域上位于第i个时间单元中的PDCCH符号;
当第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,第一信道资源在时域上位于第i个时间单元中的数据符号。
本发明实施例中,可选的,当第一信道资源在时域上位于第i个时间单元中的数据符号时,第一信道资源包括X个RU,X个RU中的任意一RU在时域上占用1个符号,在频域上占用
Figure PCTCN2015092580-appb-000018
个子载波,其中,X为正整数。
本发明实施例中,可选的,若Y大于或者等于X,第一信道资源在时域上位于第i个时间单元中的第一个数据符号,在频域上占用X个RU,其中,Y为可用带宽在频域上占用的RU数;
若Y小于X,第一信道资源在时域上位于第i个时间单元中的前N个数 据符号,针对N个数据符号的每个数据符号,第一信道资源在频域上占用
Figure PCTCN2015092580-appb-000019
个RU,N小于或等于第i个时间单元中包含的数据符号的总个数;
若Y小于X,第一信道资源在时域上位于第i个时间单元中的前N个数据符号,针对N个数据符号中的前N-1个数据符号,第一信道资源在频域上占用W个RU,针对N个数据符号中的第N个数据符号,第一信道资源在频域上占用X-W*(N-1)个RU,N小于或等于第i个时间单元中包含的数据符号的总个数,W小于或等于Y,X-W*(N-1)小于或等于Y。
本发明实施例中,可选的,当第一信道资源在时域上位于第i个时间单元中的数据符号时,第一信道资源为集中式信道资源,或者,分布式信道资源。
本发明实施例中,可选的,DCI包括用于指示传输资源的信息;
若第一信道资源为集中式信道资源,传输资源在频域上占用至少一个集中式增强资源块组LERBG;
若第一信道资源为分布式信道资源,传输资源在频域上占用至少一个分布式增强资源块组DERBG。
本发明实施例中,可选的,若NT=2,且第i个时间单元为第一时间单元,第一信道资源为第一控制区域中的一个PDCCH,第一控制区域位于第一个slot中的前Nsym1个符号;
若NT=2,且第i个时间单元为第二时间单元,第一信道资源为第二控制区域中的一个PDCCH,第二控制区域位于第二个slot中的前Nsym2个符号;
其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
本发明实施例中,进一步的,还包括接收单元52,用于接收基站发送的用于指示Nsym2取值的信令;
其中,信令为第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,第二个slot上的PCFICH承载的CFI,或者,第一个slot上的PDCCH承载的DCI,或者,高层信令。
参阅图5B所示,本发明实施例中,提出一种终端设备的示意图,该基站包括处理器500、发送器510,其中:
处理器500,用于检测第一信道资源,第一信道资源在时域上位于一个子帧中的第i个时间单元,一个子帧包含NT个时间单元,NT为大于或者等于2的整数,i为小于或者等于NT的正整数;
发送器510,用于解译基站发送的下行控制信息DCI,DCI承载于第一信道资源。
需要说明的是,处理器500还用于执行处理单元50所执行的其他操作,发送器510还用于执行发送单元51所执行的其他操作,还包括接收器520,用于执行接收单元52所执行的操作。
需要说明的是,图5A和图5B所描述的终端设备可以执行实施例二中的所有步骤,也就是说,图5A和图5B所描述的终端设备可以执行的步骤即使在实施例四中没有具体细化或者扩展等操作,但是,这些步骤在实施例二中有具体细化或者扩展等操作,那这些步骤的具体细化或者扩展等操作也同样适用于图5A和图5B所描述的终端设备,图5A和图5B所描述的终端设备可以根据实施例二的具体细化和扩展对相应的步骤进行具体细化和扩展。
同理,实施例二中的所有静态限定的描述也同样适用于图5A和图5B所描述的终端设备。
图5A和图5B所提供的终端设备检测到的第一信道资源在时域上位于一个子帧中的第i个时间单元,i为小于或者等于NT的正整数,也就是说,子帧中的每一个时间单元均有第一信道资源,因此,无论在哪一个时间单元上需要传输数据,都可以立即传输,不需要等到下一个子帧传输,也就是说,图5A和图5B所提供的终端设备无论在哪一个时间单元上需要接收数据,都可以立即接收,不需要等到下一个子帧接收,因此,图5A和图5B所提供的终端设备降低了调度时延。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或 计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例做出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然,本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样,倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些 改动和变型在内。

Claims (68)

  1. 一种发送下行控制信息DCI的方法,其特征在于,包括:
    基站确定第一信道资源,所述第一信道资源在时域上位于一个子帧中的第i个时间单元,所述一个子帧包含NT个时间单元,所述NT为大于或者等于2的整数,所述i为小于或者等于所述NT的正整数;
    所述基站在所述第一信道资源上向终端设备发送下行控制信息DCI。
  2. 如权利要求1所述的方法,其特征在于,所述NT为2、4、6、7、12,及14中的至少一种。
  3. 如权利要求1或2所述的方法,其特征在于,当所述NT=2时,所述一个子帧中包含的2个时间单元分别为第一时间单元和第二时间单元,所述第一时间单元位于所述一个子帧中的第一个slot,所述第二时间单元位于所述一个子帧中的第二个slot;
    当所述NT=4时,所述一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,所述第一时间单元位于第一符号集{#0,#1,#2,#3},所述第二时间单元位于第二符号集{#4,#5,#6},所述第三时间单元位于第三符号集{#7,#8,#9,#10},所述第四时间单元位于第四符号集{#11,#12,#13}。
  4. 如权利要求1-3任一项所述的方法,其特征在于,所述基站确定第一信道资源之前,还包括:
    所述基站确定聚合级别AL在时长为T的时间内为L,所述L为正整数;或者,
    所述基站确定AL为L,并向所述终端设备发送信令,所述信令用于指示所述第一信道资源的AL为所述L,所述L为正整数。
  5. 如权利要求1-4任一项所述的方法,其特征在于,所述基站确定第一信道资源,包括:
    所述基站确定M个候选信道资源,所述M个候选信道资源中的每个候选 信道资源的AL均为L,所述M为正整数;
    所述基站从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源。
  6. 如权利要求5所述的方法,其特征在于,所述基站从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源,包括:
    所述基站根据终端设备标识,从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源。
  7. 如权利要求5或6所述的方法,其特征在于,若所述NT等于2,且所述L等于1或2,则所述M等于3;
    若所述NT等于2,且所述L等于4或8,则所述M等于1;
    若所述NT等于4,6,7,12或14,且所述L等于1或2,则所述M等于1或2;
    若所述NT等于4,6,7,12或14,且所述L等于4或8,则所述M等于1。
  8. 如权利要求1-7任一所述的方法,其特征在于,所述DCI包括用于指示传输资源的信息;
    所述基站在所述第一信道资源上向终端设备发送DCI之后,还包括:
    所述基站在所述传输资源上与所述终端设备进行数据传输。
  9. 如权利要求8所述的方法,其特征在于,所述传输资源不能够用于承载其他终端设备的DCI。
  10. 如权利要求1-9任一所述的方法,其特征在于,所述第i个时间单元包括至少一个数据符号,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
  11. 如权利要求1-9任一所述的方法,其特征在于,当所述第i个时间单元中包括PDCCH符号时,所述第一信道资源在时域上位于所述第i个时间单元中的所述PDCCH符号;
    当所述第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
  12. 如权利要求10或11所述的方法,其特征在于,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源包括X个RU,所述X个RU中的任意一RU在时域上占用1个符号,在频域上占用
    Figure PCTCN2015092580-appb-100001
    个子载波,其中,X为正整数。
  13. 如权利要求12所述的方法,其特征在于,若Y大于或者等于X,所述第一信道资源在时域上位于所述第i个时间单元中的第一个数据符号,在频域上占用所述X个RU,其中,Y为可用带宽在频域上占用的RU数;
    若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号的每个数据符号,所述第一信道资源在频域上占用所述
    Figure PCTCN2015092580-appb-100002
    个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数;
    若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号中的前N-1个数据符号,所述第一信道资源在频域上占用W个RU,针对所述N个数据符号中的第N个数据符号,所述第一信道资源在频域上占用X-W*(N-1)个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数,所述W小于或等于所述Y,X-W*(N-1)小于或等于所述Y。
  14. 如权利要求1-13任一所述的方法,其特征在于,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源为集中式信道资源,或者,分布式信道资源。
  15. 如权利要求14所述的方法,其特征在于,所述DCI包括用于指示传输资源的信息;
    若所述第一信道资源为集中式信道资源,所述传输资源在频域上占用至少一个集中式增强资源块组LERBG;
    若所述第一信道资源为分布式信道资源,所述传输资源在频域上占用至少一个分布式增强资源块组DERBG。
  16. 如权利要求3-8任一所述的方法,其特征在于,若NT=2,且所述第i个时间单元为所述第一时间单元,所述第一信道资源为第一控制区域中的一个PDCCH,所述第一控制区域位于所述第一个slot中的前Nsym1个符号;
    若NT=2,且所述第i个时间单元为所述第二时间单元,所述第一信道资源为第二控制区域中的一个PDCCH,所述第二控制区域位于所述第二个slot中的前Nsym2个符号;
    其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
  17. 如权利要求16所述的方法,其特征在于,基站确定第一信道资源之前,还包括:
    所述基站向终端设备发送指示所述Nsym2取值的信令;
    其中,所述信令为所述第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,所述第二个slot上的PCFICH承载的CFI,或者,高层信令。
  18. 一种接收下行控制信息DCI的方法,其特征在于,包括:
    终端设备检测第一信道资源,所述第一信道资源在时域上位于一个子帧中的第i个时间单元,所述一个子帧包含NT个时间单元,所述NT为大于或者等于2的整数,所述i为小于或者等于所述NT的正整数;
    所述终端设备解译基站发送的下行控制信息DCI,所述DCI承载于所述第一信道资源。
  19. 如权利要求18所述的方法,其特征在于,所述NT为2、4、6、7、12,及14中的至少一种。
  20. 如权利要求18或19所述的方法,其特征在于,当所述NT=2时,所述一个子帧中包含的2个时间单元分别为第一时间单元和第二时间单元,所 述第一时间单元位于所述一个子帧中的第一个slot,所述第二时间单元位于所述一个子帧中的第二个slot;
    当所述NT=4时,所述一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,所述第一时间单元位于第一符号集{#0,#1,#2,#3},所述第二时间单元位于第二符号集{#4,#5,#6},所述第三时间单元位于第三符号集{#7,#8,#9,#10},所述第四时间单元位于第四符号集{#11,#12,#13}。
  21. 如权利要求18-20任一项所述的方法,其特征在于,所述终端设备检测第一信道资源之前,还包括:
    所述终端设备确定聚合级别AL在时长为T的时间内为L,所述L为正整数;或者,
    所述终端设备接收所述基站发送的信令,并根据所述信令确定AL为L,所述信令用于指示所述第一信道资源的AL为所述L,所述L为正整数。
  22. 如权利要求18-21任一项所述的方法,其特征在于,所述终端设备检测第一信道资源,包括:
    所述终端设备确定M个候选信道资源,所述M个候选信道资源中的每个候选信道资源的AL均为L,所述M为正整数;
    所述终端设备从所述M个候选信道资源中检测出一个候选信道资源为所述第一信道资源。
  23. 如权利要求18-21任一所述的方法,其特征在于,所述终端设备从所述M个候选信道资源中检测出一个候选信道资源为所述第一信道资源,包括:
    所述终端设备根据终端设备标识,从所述M个候选信道资源中检测出一个候选信道资源作为所述第一信道资源。
  24. 如权利要求22或23所述的方法,其特征在于,若所述NT等于2,且所述L等于1或2,则所述M等于3;
    若所述NT等于2,且所述L等于4或8,则所述M等于1;
    若所述NT等于4,6,7,12或14,且所述L等于1或2,则所述M等于1或2;
    若所述NT等于4,6,7,12或14,且所述L等于4或8,则所述M等于1。
  25. 如权利要求18-24任一所述的方法,其特征在于,所述DCI包括用于指示传输资源的信息;
    所述终端设备解译基站发送的DCI之后,还包括:
    所述终端设备在所述传输资源上与所述基站进行数据传输。
  26. 如权利要求25所述的方法,其特征在于,所述传输资源不能够用于承载其他终端设备的DCI。
  27. 如权利要求18-26任一所述的方法,其特征在于,所述第i个时间单元包括至少一个数据符号,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
  28. 如权利要求18-26任一所述的方法,其特征在于,当所述第i个时间单元中包括PDCCH符号时,所述第一信道资源在时域上位于所述第i个时间单元中的PDCCH符号;
    当所述第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
  29. 如权利要求27或28所述的方法,其特征在于,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源包括X个RU,所述X个RU中的任意一RU在时域上占用1个符号,在频域上占用
    Figure PCTCN2015092580-appb-100003
    个子载波,其中,X为正整数。
  30. 如权利要求29所述的方法,其特征在于,若Y大于或者等于X,所述第一信道资源在时域上位于所述第i个时间单元中的第一个数据符号,在频域上占用所述X个RU,其中,Y为可用带宽在频域上占用的RU数;
    若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的 前N个数据符号,针对所述N个数据符号的每个数据符号,所述第一信道资源在频域上占用所述
    Figure PCTCN2015092580-appb-100004
    个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数;
    若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号中的前N-1个数据符号,所述第一信道资源在频域上占用W个RU,针对所述N个数据符号中的第N个数据符号,所述第一信道资源在频域上占用X-W*(N-1)个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数,所述W小于或等于所述Y,X-W*(N-1)小于或等于所述Y。
  31. 如权利要求18-30任一所述的方法,其特征在于,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源为集中式信道资源,或者,分布式信道资源。
  32. 如权利要求31所述的方法,其特征在于,所述DCI包括用于指示传输资源的信息;
    若所述第一信道资源为集中式信道资源,所述传输资源在频域上占用至少一个集中式增强资源块组LERBG;
    若所述第一信道资源为分布式信道资源,所述传输资源在频域上占用至少一个分布式增强资源块组DERBG。
  33. 如权利要求20-25任一所述的方法,其特征在于,若NT=2,且所述第i个时间单元为所述第一时间单元,所述第一信道资源为第一控制区域中的一个PDCCH,所述第一控制区域位于所述第一个slot中的前Nsym1个符号;
    若NT=2,且所述第i个时间单元为所述第二时间单元,所述第一信道资源为第二控制区域中的一个PDCCH,所述第二控制区域位于所述第二个slot中的前Nsym2个符号;
    其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
  34. 如权利要求33所述的方法,其特征在于,所述终端设备检测第一信道资源之前,还包括:
    所述终端设备接收所述基站发送的用于指示所述Nsym2取值的信令;
    其中,所述信令为所述第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,所述第二个slot上的PCFICH承载的CFI,或者,高层信令。
  35. 一种基站,其特征在于,包括:
    处理单元,用于确定第一信道资源,所述第一信道资源在时域上位于一个子帧中的第i个时间单元,所述一个子帧包含NT个时间单元,所述NT为大于或者等于2的整数,所述i为小于或者等于所述NT的正整数;
    发送单元,用于在所述第一信道资源上向终端设备发送下行控制信息DCI。
  36. 如权利要求35所述的基站,其特征在于,所述NT为2、4、6、7、12,及14中的至少一种。
  37. 如权利要求35或36所述的基站,其特征在于,当所述NT=2时,所述一个子帧中包含的36个时间单元分别为第一时间单元和第二时间单元,所述第一时间单元位于所述一个子帧中的第一个slot,所述第二时间单元位于所述一个子帧中的第二个slot;
    当所述NT=4时,所述一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,所述第一时间单元位于第一符号集{#0,#1,#2,#3},所述第二时间单元位于第二符号集{#4,#5,#6},所述第三时间单元位于第三符号集{#7,#8,#9,#10},所述第四时间单元位于第四符号集{#11,#12,#13}。
  38. 如权利要求35-37任一项所述的基站,其特征在于,所述处理单元还用于,确定聚合级别AL在时长为T的时间内为L,所述L为正整数;或者,确定AL为L,并向所述终端设备发送信令,所述信令用于指示所述第一信道 资源的AL为所述L,所述L为正整数。
  39. 如权利要求35-38任一项所述的基站,其特征在于,所述处理单元确定第一信道资源时,具体为:
    确定M个候选信道资源,所述M个候选信道资源中的每个候选信道资源的AL均为L,所述M为正整数;
    从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源。
  40. 如权利要求39所述的基站,其特征在于,所述处理单元从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源时,具体为:
    根据终端设备标识,从所述M个候选信道资源中选择出一个候选信道资源作为所述第一信道资源。
  41. 如权利要求39或40所述的基站,其特征在于,若所述NT等于2,且所述L等于1或2,则所述M等于3;
    若所述NT等于2,且所述L等于4或8,则所述M等于1;
    若所述NT等于4,6,7,12或14,且所述L等于1或2,则所述M等于1或2;
    若所述NT等于4,6,7,12或14,且所述L等于4或8,则所述M等于1。
  42. 如权利要求35-41任一所述的基站,其特征在于,所述DCI包括用于指示传输资源的信息;
    所述发送单元还用于,在所述传输资源上与所述终端设备进行数据传输。
  43. 如权利要求42所述的基站,其特征在于,所述传输资源不能够用于承载其他终端设备的DCI。
  44. 如权利要求35-43任一所述的基站,其特征在于,所述第i个时间单元包括至少一个数据符号,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
  45. 如权利要求35-43任一所述的基站,其特征在于,当所述第i个时间单元中包括PDCCH符号时,所述第一信道资源在时域上位于所述第i个时间单元中的所述PDCCH符号;
    当所述第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
  46. 如权利要求44或45所述的基站,其特征在于,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源包括X个RU,所述X个RU中的任意一RU在时域上占用1个符号,在频域上占用
    Figure PCTCN2015092580-appb-100005
    个子载波,其中,X为正整数。
  47. 如权利要求46所述的基站,其特征在于,若Y大于或者等于X,所述第一信道资源在时域上位于所述第i个时间单元中的第一个数据符号,在频域上占用所述X个RU,其中,Y为可用带宽在频域上占用的RU数;
    若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号的每个数据符号,所述第一信道资源在频域上占用所述
    Figure PCTCN2015092580-appb-100006
    个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数;
    若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号中的前N-1个数据符号,所述第一信道资源在频域上占用W个RU,针对所述N个数据符号中的第N个数据符号,所述第一信道资源在频域上占用X-W*(N-1)个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数,所述W小于或等于所述Y,X-W*(N-1)小于或等于所述Y。
  48. 如权利要求35-47任一所述的基站,其特征在于,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源为集中式信道资源,或者,分布式信道资源。
  49. 如权利要求48所述的基站,其特征在于,所述DCI包括用于指示传 输资源的信息;
    若所述第一信道资源为集中式信道资源,所述传输资源在频域上占用至少一个集中式增强资源块组LERBG;
    若所述第一信道资源为分布式信道资源,所述传输资源在频域上占用至少一个分布式增强资源块组DERBG。
  50. 如权利要求37-42任一所述的基站,其特征在于,若NT=2,且所述第i个时间单元为所述第一时间单元,所述第一信道资源为第一控制区域中的一个PDCCH,所述第一控制区域位于所述第一个slot中的前Nsym1个符号;
    若NT=2,且所述第i个时间单元为所述第二时间单元,所述第一信道资源为第二控制区域中的一个PDCCH,所述第二控制区域位于所述第二个slot中的前Nsym2个符号;
    其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
  51. 如权利要求50所述的基站,其特征在于,所述发送单元还用于,向终端设备发送指示所述Nsym2取值的信令;
    其中,所述信令为所述第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,所述第二个slot上的PCFICH承载的CFI,或者,高层信令。
  52. 一种终端设备,其特征在于,包括:
    处理单元,用于检测第一信道资源,所述第一信道资源在时域上位于一个子帧中的第i个时间单元,所述一个子帧包含NT个时间单元,所述NT为大于或者等于2的整数,所述i为小于或者等于所述NT的正整数;
    发送单元,用于解译基站发送的下行控制信息DCI,所述DCI承载于所述第一信道资源。
  53. 如权利要求52所述的终端设备,其特征在于,所述NT为2、4、6、7、12,及14中的至少一种。
  54. 如权利要求52或53所述的终端设备,其特征在于,当所述NT=2时,所述一个子帧中包含的2个时间单元分别为第一时间单元和第二时间单元,所述第一时间单元位于所述一个子帧中的第一个slot,所述第二时间单元位于所述一个子帧中的第二个slot;
    当所述NT=4时,所述一个子帧中包含的4个时间单元为第一时间单元、第二时间单元、第三时间单元和第四时间单元,所述第一时间单元位于第一符号集{#0,#1,#2,#3},所述第二时间单元位于第二符号集{#4,#5,#6},所述第三时间单元位于第三符号集{#7,#8,#9,#10},所述第四时间单元位于第四符号集{#11,#12,#13}。
  55. 如权利要求52-54任一项所述的终端设备,其特征在于,所述处理单元还用于,确定聚合级别AL在时长为T的时间内为L,所述L为正整数;或者,
    还包括接收单元,用于接收所述基站发送的信令;
    所述处理单元还用于,根据所述接收单元接收到的信令确定AL为L,所述信令用于指示所述第一信道资源的AL为所述L,所述L为正整数。
  56. 如权利要求52-55任一项所述的终端设备,其特征在于,所述处理单元检测第一信道资源时,具体为:
    确定M个候选信道资源,所述M个候选信道资源中的每个候选信道资源的AL均为L,所述M为正整数;
    从所述M个候选信道资源中检测出一个候选信道资源为所述第一信道资源。
  57. 如权利要求52-55任一所述的终端设备,其特征在于,所述处理单元从所述M个候选信道资源中检测出一个候选信道资源为所述第一信道资源时,具体为:
    根据终端设备标识,从所述M个候选信道资源中检测出一个候选信道资源作为所述第一信道资源。
  58. 如权利要求56或57所述的终端设备,其特征在于,若所述NT等于2,且所述L等于1或2,则所述M等于3;
    若所述NT等于2,且所述L等于4或8,则所述M等于1;
    若所述NT等于4,6,7,12或14,且所述L等于1或2,则所述M等于1或2;
    若所述NT等于4,6,7,12或14,且所述L等于4或8,则所述M等于1。
  59. 如权利要求52-58任一所述的终端设备,其特征在于,所述DCI包括用于指示传输资源的信息;
    所述发送单元还用于,在所述传输资源上与所述基站进行数据传输。
  60. 如权利要求59所述的终端设备,其特征在于,所述传输资源不能够用于承载其他终端设备的DCI。
  61. 如权利要求52-60任一所述的终端设备,其特征在于,所述第i个时间单元包括至少一个数据符号,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
  62. 如权利要求52-60任一所述的终端设备,其特征在于,当所述第i个时间单元中包括PDCCH符号时,所述第一信道资源在时域上位于所述第i个时间单元中的PDCCH符号;
    当所述第i个时间单元中不包括PDCCH符号,且包括至少一个数据符号时,所述第一信道资源在时域上位于所述第i个时间单元中的数据符号。
  63. 如权利要求61或62所述的终端设备,其特征在于,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源包括X个RU,所述X个RU中的任意一RU在时域上占用1个符号,在频域上占用
    Figure PCTCN2015092580-appb-100007
    个子载波,其中,X为正整数。
  64. 如权利要求63所述的终端设备,其特征在于,若Y大于或者等于X,所述第一信道资源在时域上位于所述第i个时间单元中的第一个数据符号,在 频域上占用所述X个RU,其中,Y为可用带宽在频域上占用的RU数;
    若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号的每个数据符号,所述第一信道资源在频域上占用所述
    Figure PCTCN2015092580-appb-100008
    个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数;
    若Y小于X,所述第一信道资源在时域上位于所述第i个时间单元中的前N个数据符号,针对所述N个数据符号中的前N-1个数据符号,所述第一信道资源在频域上占用W个RU,针对所述N个数据符号中的第N个数据符号,所述第一信道资源在频域上占用X-W*(N-1)个RU,所述N小于或等于所述第i个时间单元中包含的数据符号的总个数,所述W小于或等于所述Y,X-W*(N-1)小于或等于所述Y。
  65. 如权利要求52-64任一所述的终端设备,其特征在于,当所述第一信道资源在时域上位于所述第i个时间单元中的数据符号时,所述第一信道资源为集中式信道资源,或者,分布式信道资源。
  66. 如权利要求65所述的终端设备,其特征在于,所述DCI包括用于指示传输资源的信息;
    若所述第一信道资源为集中式信道资源,所述传输资源在频域上占用至少一个集中式增强资源块组LERBG;
    若所述第一信道资源为分布式信道资源,所述传输资源在频域上占用至少一个分布式增强资源块组DERBG。
  67. 如权利要求54-59任一所述的终端设备,其特征在于,若NT=2,且所述第i个时间单元为所述第一时间单元,所述第一信道资源为第一控制区域中的一个PDCCH,所述第一控制区域位于所述第一个slot中的前Nsym1个符号;
    若NT=2,且所述第i个时间单元为所述第二时间单元,所述第一信道资源为第二控制区域中的一个PDCCH,所述第二控制区域位于所述第二个slot中的前Nsym2个符号;
    其中,Nsym1为1,2,3或4,Nsym2为正整数,第二控制区域占用的频域资源小于或等于第一控制区域占用的频域资源。
  68. 如权利要求67所述的终端设备,其特征在于,还包括接收单元,用于接收所述基站发送的用于指示所述Nsym2取值的信令;
    其中,所述信令为所述第一个slot上的物理控制格式指示信道PCFICH承载的控制格式指示CFI,或者,所述第二个slot上的PCFICH承载的CFI,或者,高层信令。
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