WO2016004560A1 - 一种数据传输方法及设备 - Google Patents

一种数据传输方法及设备 Download PDF

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Publication number
WO2016004560A1
WO2016004560A1 PCT/CN2014/080426 CN2014080426W WO2016004560A1 WO 2016004560 A1 WO2016004560 A1 WO 2016004560A1 CN 2014080426 W CN2014080426 W CN 2014080426W WO 2016004560 A1 WO2016004560 A1 WO 2016004560A1
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WO
WIPO (PCT)
Prior art keywords
control channel
search space
scheduling control
information
preset
Prior art date
Application number
PCT/CN2014/080426
Other languages
English (en)
French (fr)
Inventor
韩广林
熊新
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112016030001-7A priority Critical patent/BR112016030001A2/pt
Priority to EP14897277.1A priority patent/EP3148242A4/en
Priority to PCT/CN2014/080426 priority patent/WO2016004560A1/zh
Priority to CN201480030913.6A priority patent/CN105393576B/zh
Priority to JP2016574160A priority patent/JP2017525237A/ja
Publication of WO2016004560A1 publication Critical patent/WO2016004560A1/zh
Priority to US15/383,551 priority patent/US10306659B2/en

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Classifications

    • 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
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038Blind format detection
    • 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
    • H04L1/0045Arrangements at the receiver end
    • H04L1/0046Code rate detection or code type detection
    • 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
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • 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
    • H04W72/20Control channels or signalling for resource management
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications, and in particular, to a data transmission method and device.
  • the eNB In the downlink transmission of the LTE (Long Term Evolution; short term evolution) communication system, the eNB (English: evolved Node B; abbreviated as: evolved base station) usually performs data transmission in units of subframes, and one subframe length is 1 ms, a subframe includes a physical downlink shared channel (English: Physical Downlink Shared Channel; abbreviated as: PDSCH) region and a physical downlink control channel (English: Physical Downlink Control Channel; PDCCH) region, where the PDSCH is used to carry the eNB.
  • the data sent to the user equipment, the PDCCH is used to carry resource allocation information sent by the eNB to the user equipment.
  • the eNB divides the PDCCH region into different sub-regions, and each sub-region is a search space.
  • the eNB transmits resource allocation information to the user equipment by searching the PDCCH in the space.
  • the user equipment performs blind detection on the PDCCH in the search space in order to receive the resource allocation information sent by the base station in the search space. If the user equipment detects the resource allocation information sent by the eNB to the user equipment, the user equipment receives the resource allocation information. .
  • one PDCCH carries one resource allocation information. Since the lengths of different resource allocation information are not completely the same, the number of physical resource units occupied by different PDCCHs carrying different resource allocation information, that is, the length of the scheduling control channel is not completely the same. Therefore, when the user equipment performs blind detection, blind detection is performed in the search space according to various possible scheduling control channel lengths, resulting in low efficiency and excessive power consumption of the user equipment.
  • Embodiments of the present invention provide a data transmission method and device, which can improve the efficiency of blind detection of user equipment and reduce the power consumed by the user equipment due to blind detection.
  • a data transmission device includes:
  • a receiving unit configured to receive scheduling control channel length information, where the scheduling control channel length information includes a quantity of physical resource units occupied by the scheduling control channel, and the scheduling control channel a control channel when transmitting resource allocation information to the data transmission device;
  • the processing unit configured to perform blind detection according to the scheduling control channel length information received by the receiving unit in the preset search space, and obtain the scheduling control channel after detecting the scheduling control channel corresponding to the scheduling control channel length information
  • the resource allocation information that is carried, the preset search space is a search space for carrying the resource allocation information.
  • the receiving unit is further configured to receive preset search space configuration information, where the preset search space configuration information includes location information of the preset search space, where location information of the preset search space is used to indicate The time-frequency resource occupied by the preset search space.
  • the preset search space configuration information received by the receiving unit further includes: category information of the preset search space, the category information of the preset search space is used to indicate a category of the preset search space, and the
  • the categories of search spaces include: public search space, dedicated search space, or group-specific search space.
  • the preset search space configuration information received by the receiving unit further includes category information of a preset search space, and the category information of the preset search space indicates that the preset search space is a group-specific search space
  • the preset search space configuration information further includes the identifier information of the preset subframe, where the identifier information of the preset subframe is used to indicate a subframe that carries the scheduling control channel
  • the processing unit is further configured to The identification information of the preset subframe received by the receiving unit is blindly detected according to the scheduling control channel length information in the preset search space on the preset subframe.
  • the scheduling control channel length information received by the receiving unit is one of the following: a quantity of channel control units CCE occupied by the scheduling control channel;
  • the number of subcarriers occupied by the scheduling control channel The number of physical symbols occupied by the scheduling control channel;
  • the processing unit is configured to: in the preset search space, the consecutive k physical resource units according to the number of physical resource units occupied by the scheduling control channel indicated by the scheduling control channel length information As a scheduling control channel, the resource allocation information carried by the scheduling control channel in the preset search space is descrambled according to the preset descrambling identifier, where the preset descrambling identifier is information about the resource allocation.
  • the resource allocation information is resource allocation information that is sent to the first device, where the i th scheduling control channel is the scheduling control channel, where the i is an integer greater than 0.
  • a data transmission device includes:
  • a processing unit configured to acquire scheduling control channel length information, where the scheduling control channel length information includes a quantity of physical resource units occupied by the scheduling control channel, where the scheduling control channel is used to send resource allocation information to the first device Control channel
  • a sending unit configured to send the scheduling control channel length information acquired by the processing unit, where the processing unit is configured to configure a length of the scheduling control channel according to the acquired scheduling control channel length information;
  • the sending unit is configured to send the scheduling control channel to the first device after the processing unit finishes configuring the length of the scheduling control channel.
  • the sending unit is further configured to send preset search space configuration information, where the preset search space configuration information includes location information of the preset search space, where the location information of the preset search space is used to indicate the location The time-frequency resource occupied by the preset search space.
  • the preset search space configuration information sent by the sending unit further includes: the preset search space is The category information of the preset search space is used to indicate a category of the preset search space, and the category of the preset search space includes: a public search space, a dedicated search space, or a group-specific search space.
  • the scheduling control channel length information acquired by the processing unit is one of the following:
  • a data transmission method includes:
  • the first device receives the scheduling control channel length information, where the scheduling control channel length information includes the number of physical resource units occupied by the scheduling control channel, where the scheduling control channel is when the resource allocation information is sent to the first device.
  • Control channel includes the number of physical resource units occupied by the scheduling control channel, where the scheduling control channel is when the resource allocation information is sent to the first device.
  • the first device performs blind detection according to the scheduling control channel length information in a preset search space
  • the first device After the first device detects the scheduling control channel corresponding to the scheduling control channel length information, acquiring the resource allocation information carried by the scheduling control channel, where the preset search space is used to carry the resource Distribution, search space.
  • the method further includes: the first device receiving preset search space configuration information, where the preset search space configuration information includes location information of the preset search space The location information of the preset search space is used to indicate a time-frequency resource occupied by the preset search space.
  • the preset search space configuration information further includes: category information of the preset search space, the preset search space The category information is used to indicate a category of the preset search space, and the categories of the preset search space include: a public search space, a dedicated search space, or a group-specific search.
  • category information is used to indicate a category of the preset search space
  • the categories of the preset search space include: a public search space, a dedicated search space, or a group-specific search.
  • the preset search space configuration information received by the first device further includes category information of a preset search space, and the category information of the preset search space indicates that the preset search space is a group-specific search space
  • the preset search space configuration information further includes identifier information of the preset subframe, where the identifier information of the preset subframe is used to indicate a subframe that carries the scheduling control channel; Perform blind detection according to the scheduling control channel length information in the space, including:
  • the first device performs blind detection according to the scheduling control channel length information in the preset search space on the preset subframe according to the identifier information of the preset subframe.
  • the scheduling control channel length information is one of the following:
  • the first device performs blind detection according to the scheduling control channel length information in a preset search space, and includes:
  • the first device in the preset search space, uses consecutive k physical resource units as one scheduling according to the number of physical resource units occupied by the scheduling control channel indicated by the scheduling control channel length information.
  • the control channel is configured to descramble the resource allocation information carried by the scheduling control channel in the preset search space according to the preset descrambling identifier, where the preset descrambling identifier is to scramble the resource allocation information Processing the corresponding descrambling identifier, where k is the number of physical resource units occupied by the scheduling control channel;
  • the resource allocation information is sent to the first device
  • the resource allocation information, the i-th scheduling control channel is the scheduling control channel, where the i is an integer greater than 0.
  • a data transmission method includes:
  • the second device sends the scheduling control channel length information, where the scheduling control channel length information includes the number of physical resource units occupied by the scheduling control channel, and the scheduling control channel is a control channel when the resource allocation information is sent to the first device. ;
  • the second device sends the scheduling control channel to the first device according to the scheduling control channel length information.
  • the method further includes: the second device sending preset search space configuration information, where the preset search space configuration information includes location information of the preset search space The location information of the preset search space is used to indicate a time-frequency resource occupied by the preset search space.
  • the preset search space configuration information further includes: the category information of the preset search space, the category information of the preset search space is used to indicate a category of the preset search space, and the category of the preset search space Includes: Public search space, dedicated search space, or group-specific search space.
  • the scheduling control channel length information is one of the following:
  • the data transmission method and device provided by the embodiment of the present invention because the second device has first sent the length of the scheduling control channel to the first device, so that the first device only needs to perform blind detection in the preset search space according to the length of the scheduling control channel. Compared with the prior art, there is no need to follow it. It schedules the control channel length to perform blind detection in the preset search space to receive resource allocation information. Further, when the second device sends the resource allocation information to the first device by using the group-specific search space, the second device sends the preset subframe identifier to the first device, so that the first device only needs to be indicated by the preset subframe identifier. Blind detection is performed within sub-frames without blind detection in each sub-frame.
  • the blind detection method provided by the embodiment of the invention reduces the number of blind detections of the first device, thereby improving the blind detection efficiency of the first device and reducing the power consumption of the first device due to blind detection.
  • FIG. 1 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of another data transmission device according to an embodiment of the present invention
  • FIG. 3 is a data according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of another data transmission method according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of still another data transmission method according to an embodiment of the present invention.
  • the embodiment of the present invention provides a data transmission device.
  • the device 101 includes a receiving unit 101 1 and a processing unit 1012.
  • the receiving unit 101 1 is configured to receive scheduling control channel length information, where the scheduling control channel length information includes a quantity of physical resource units occupied by the scheduling control channel, and the scheduling control channel is a control channel when the resource allocation information is sent to the data transmission device. .
  • the processing unit 1012 is configured to control channel length information according to scheduling in a preset search space. Performing blind detection, after detecting the scheduling control channel corresponding to the scheduling control channel length information, acquiring the resource allocation information carried by the scheduling control channel, where the preset search space is used to carry the resource allocation The search space for information.
  • the data transmission device provided by the embodiment of the present invention can receive the resource allocation information by receiving the data transmission device length information and performing blind detection in the preset search space according to the length of the data transmission device, without further complying with other data transmission devices.
  • the length is blindly detected in the preset search space, thereby reducing the number of blind detections of the data transmission device, thereby improving the blind detection efficiency of the data transmission device and reducing the power consumption of the data transmission device due to blind detection.
  • the receiving unit 101 1 is further configured to receive the preset search space configuration information, where the preset search space configuration information includes the location information of the preset search space, where the location information of the preset search space is used to indicate the preset search. Time-frequency resources occupied by space.
  • the preset search space configuration information received by the receiving unit 101 1 further includes: category information of the preset search space, where the category information of the preset search space is used to indicate a category of the preset search space, and the preset search
  • the categories of space include: public search space, dedicated search space, or group-specific search space.
  • the preset search space configuration information received by the receiving unit 101 1 further includes category information of the preset search space, and the category information of the preset search space indicates that the preset search space is a group-specific search space.
  • the preset search space configuration information further includes the identifier information of the preset subframe, and the identifier information of the preset subframe is a subframe used to indicate the bearer scheduling control channel.
  • the processing unit 1012 is further configured to: the identification information of the preset subframe received by the receiving unit 1011, and perform blind detection according to the scheduling control channel length information in a preset search space on the preset subframe.
  • the scheduling control channel length information received by the receiving unit 101 1 is one of the following:
  • the scheduling control channel length information is one of the following:
  • the number of channel control units CCE occupied by the scheduling control channel is the number of channel control units CCE occupied by the scheduling control channel.
  • the number of subcarriers occupied by the scheduling control channel is the number of subcarriers occupied by the scheduling control channel.
  • the number of physical symbols occupied by the scheduling control channel is the number of physical symbols occupied by the scheduling control channel.
  • the processing unit 1012 is specifically configured to perform, according to the preset search space And controlling, by the control channel length information, the number of physical resource units occupied by the scheduling control channel, and using the consecutive k physical resource units as one scheduling control channel, according to the preset descrambling identifier, in the preset search space
  • the resource allocation information carried by the scheduling control channel is descrambled, wherein the preset descrambling identifier is a descrambling identifier corresponding to the scrambling process of the resource allocation information, and k is a physics occupied by the scheduling control channel
  • the number of resource units; if the resource allocation information carried by the i th scheduling control channel in the preset search space is correctly descrambled, the resource allocation information is resource allocation information sent to the data transmission device.
  • the i-th scheduling control channel is the scheduling control channel, where the i is an integer greater than 0.
  • the hardware device corresponding to the receiving unit in the embodiment shown in FIG. 1 may be a receiver, and the hardware device corresponding to the processing unit may be a processor.
  • the data transmission device provided by the embodiment of the present invention can receive the resource allocation information by receiving the scheduling control channel length information and performing blind detection in the preset search space according to the length of the scheduling control channel, and does not need to follow other scheduling control channels.
  • the length is blindly detected in the preset search space, thereby reducing the number of blind detections of the data transmission device, thereby improving the blind detection efficiency of the data transmission device and reducing the power consumption of the data transmission device due to blind detection.
  • the device 201 includes a transmitting unit 2011 and a processing unit 2012.
  • the processing unit 2012 is configured to obtain scheduling control channel length information, where the scheduling control channel length information includes a quantity of physical resource units occupied by the scheduling control channel, and the scheduling control channel is a control channel when the resource allocation information is sent to the first device.
  • the sending unit 2011 is configured to send scheduling control channel length information acquired by the processing unit.
  • the processing unit 2012 is configured to configure a length of the scheduling control channel according to the acquired scheduling control channel length information.
  • the sending unit 2011 is configured to send a scheduling control channel to the first device after the processing unit 2012 completes the length configuration of the scheduling control channel.
  • the data transmission device provided by the embodiment of the present invention can receive the resource allocation information by transmitting the scheduling control channel length information to the first device, so that the first device performs blind detection in the preset search space according to the scheduling control channel length. It is not necessary to perform blind detection in the preset search space according to other scheduling control channel lengths, thereby reducing the number of blind detections of the first device. Thereby, the blind detection efficiency of the first device is improved, and the power consumed by the first device due to blind detection is reduced.
  • the sending unit 201 1 is further configured to send preset search space configuration information, where the preset search space configuration information includes location information of the preset search space, where the location information of the preset search space is used to indicate the preset search. Time-frequency resources occupied by space.
  • the preset search space configuration information sent by the sending unit 201 1 further includes: category information of the preset search space, where the category information of the preset search space is used to indicate a category of the preset search space, and the category of the preset search space.
  • category information of the preset search space includes: Public search space, dedicated search space, or group-specific search space.
  • the scheduling control channel length information obtained by the processing unit 2012 is one of the following: The number of channel control units CCEs occupied by the scheduling control channel.
  • the number of subcarriers occupied by the scheduling control channel is the number of subcarriers occupied by the scheduling control channel.
  • the number of physical symbols occupied by the scheduling control channel is the number of physical symbols occupied by the scheduling control channel.
  • the hardware device corresponding to the receiving unit in the embodiment shown in FIG. 2 may be a receiver, and the hardware device corresponding to the processing unit may be a processor.
  • the data transmission device provided by the embodiment of the present invention can receive the resource allocation information by transmitting the scheduling control channel length information to the first device, so that the first device performs blind detection in the preset search space according to the scheduling control channel length. It is not necessary to perform blind detection in the preset search space according to other scheduling control channel lengths, thereby reducing the number of blind detections of the first device, thereby improving the blind detection efficiency of the first device, and reducing the first device because The amount of power consumed by blind detection.
  • the embodiment of the present invention provides a data transmission method, which is applied to the field of wireless communication.
  • the LTE wireless communication system is taken as an example for description. This does not mean that the method provided by the embodiment of the present invention can only be applied to LTE wireless communication. system. Referring to Figure 3, the following steps are included:
  • the first device receives scheduling control channel length information.
  • the scheduling control channel length information includes the number of physical resource units occupied by the scheduling control channel, where the scheduling control channel is when the resource allocation information is sent to the first device. Control channel.
  • the first device is a mobile phone, and the first device may receive scheduling control channel length information sent by the base station.
  • the scheduling control channel may be a physical downlink control channel (PDCCH) sent by the base station to the mobile phone, or may be a scheduling assignment sent by the other mobile phone to the mobile phone (Scheduling)
  • PDCCH physical downlink control channel
  • This embodiment is exemplified with the PDCCH as a scheduling control channel.
  • the base station In the downlink transmission of the LTE communication system, the base station usually performs data transmission in units of subframes, and one subframe includes multiple physical resource units in the time domain and the frequency domain, and the physical resource units are divided into a PDCCH region and a PDSCH region. section.
  • the PDCCH region may be further divided into different sub-regions, each sub-region being a search space, and different search spaces may be used to carry different types of resource allocation information.
  • the base station can configure a location of a search space within the PDCCH region.
  • the user equipment when the base station sends data to the user equipment, the user equipment is allocated a PDSCH to carry data, and a PDCCH is allocated to the user equipment in a search space to carry resource allocation information.
  • the resource allocation is performed.
  • the information may include at least one of the following: 1.
  • a resource location for transmitting data such as: a physical resource block location index corresponding to a resource occupied by the transmission data, and a location index of a physical resource block group corresponding to the resource occupied by the transmission data; Indicates the resource format used to transmit data, such as: modulation and coding mode, BPSK (Binary Phase Shift Keying), QPSK (Quadature Phase Shift Keying), 16QAM (Quadature Amplitude Modulation) , Quadrature Amplitude Modulation), 64Q AM, etc.
  • the user equipment receives data from the PDSCH allocated to the user equipment according to the resource allocation information.
  • the number of physical resource units occupied by different PDCCHs carrying different resource allocation information is not completely the same.
  • the number of physical resource units occupied by one PDCCH is called the scheduling control channel length of the PDCCH.
  • the first device receives the scheduling control channel length information, and determines the scheduling control channel length by using the scheduling control channel length information.
  • the first device receives the resource allocation information sent by the base station, the first device sends the resource to the first device by using the length of the scheduling control channel.
  • the length of the PDCCH when the source allocates information is the first device receives the scheduling control channel length information.
  • the first device performs blind detection according to scheduling control channel length information in a preset search space.
  • the first device cannot determine whether the base station sends the resource allocation information to the user equipment in the preset search space.
  • the base station sends the resource allocation information to the user equipment in the preset search space
  • the first device cannot determine the resource allocation information.
  • the specific location in the preset search space so the first device receives the resource allocation information sent by the base station to the user equipment in a manner of performing blind detection in the preset search space.
  • the base station When the base station sends the resource allocation information to the user equipment, the base station may mark the resource allocation information. If the first device detects the flag in the blind detection, the resource allocation information is the resource allocation information sent by the base station to the first device. Then the first device receives data from the PDSCH indicated by the resource allocation information, and if no resource allocation information flag is detected, the data is not received.
  • the first device performs blind detection in a preset search space according to various possible scheduling control channel lengths.
  • the blind detection method provided by the embodiment of the present invention, the base station has first sent the length of the scheduling control channel to the first device, so that the first device only needs to perform blindness in the preset search space according to the length of the scheduling control channel sent by the first device.
  • the detection can receive the resource allocation information without performing blind detection in the preset search space according to other scheduling control channel lengths, thereby reducing the number of blind detections of the first device, thereby improving the blind detection of the first device. Efficiency, and reduces the amount of power consumed by the first device due to blind detection.
  • An embodiment of the present invention provides another data transmission method. Referring to FIG. 4, the method includes the following steps:
  • the second device sends scheduling control channel length information.
  • the scheduling control channel length information includes the number of physical resource units occupied by the scheduling control channel, and the scheduling control channel is a control channel when the resource allocation information is sent to the first device.
  • the second device is a base station
  • the first device is a mobile phone
  • the scheduling control channel may be a PDCCH sent by the base station to the mobile phone, or may be a scheduling assignment sent by the other mobile phone to the mobile phone.
  • This embodiment uses the PDCCH as a scheduling control channel as an example. Sexual description.
  • the second device sends the PDCCH length required to carry the resource allocation information to the first device by using the scheduling control channel length information, so that the first device determines the length of the scheduling control channel according to the scheduling control channel length information and performs blindness in the preset search space. Detection.
  • the second device sends a scheduling control channel to the first device according to the scheduling control channel length information.
  • the PDCCH is allocated to the first device according to the length of the scheduling control channel, that is, the length of the PDCCH is the length of the scheduling control channel.
  • the base station first sends the length of the scheduling control channel to the first device, and then sends the resource allocation information to the first device, where the length of the PDCCH occupied by the resource allocation information is the length of the scheduling control channel,
  • the first device only needs to perform blind detection in the search space where the scheduling control channel is located according to the scheduling control channel length, and does not perform blind detection in the search space where the scheduling control channel is located according to other scheduling control channel lengths. This reduces the number of blind detections of the first device, thereby improving the blind detection efficiency of the first device and reducing the amount of power consumed by the first device due to blind detection.
  • Embodiments of the present invention provide a further data transmission method for use in an LTE wireless communication system.
  • the second device is an eNB
  • the first device is a mobile phone. Referring to Figure 5, the following steps are included:
  • the second device sends preset search space configuration information.
  • the preset search space configuration information includes: location information of the preset search space, and category information of the preset search space, where the location information of the preset search space is used to indicate the time-frequency resource occupied by the preset search space.
  • the category information of the preset search space is used to indicate the category of the preset search space.
  • the first device may be a base station.
  • the position of the preset search space is the position of the preset search space in the PDCCH area.
  • the location information of the preset search space may be a frequency domain or a time domain resource occupied by the preset search space, for example, a frequency domain bandwidth occupied by the preset search space, a subcarrier, and the like.
  • the category of the preset search space may be a common search space, and the resource allocation information sent by the second device in the public search space, and the user equipment in the small area can be correctly received.
  • the second device uses the downlink bandwidth information of the cell as the location information of the preset search space. The information is sent to the user device.
  • the category of the preset search space may be a dedicated search space, and each resource allocation information in the dedicated search space is only received by a certain user equipment.
  • the second device sends the temporary identifier of the cell radio network as the location information of the preset search space to the user equipment.
  • the second device sends the search space configuration information to the user equipment in the coverage area of the second device by using a system broadcast or a dedicated message.
  • the second device sends scheduling control channel length information.
  • the scheduling control channel length information includes the number of physical resource units occupied by the scheduling control channel, and the scheduling control channel is a control channel when the resource allocation information is sent to the first device.
  • the scheduling control channel may be a PDCCH that is sent by the second device to the first device, or may be a scheduling assignment sent by the other terminal device other than the first device to the second device. This embodiment is exemplified by using a PDCCH as a scheduling control channel.
  • the corresponding PDCCH length can also take many forms.
  • the scheduling control channel length may be any one of the following:
  • the present invention does not limit the specific physical resource format.
  • only the channel control unit is taken as an example for description.
  • the second device may send the scheduling control channel length information to the first device by using a system broadcast;
  • the second device may send the scheduling control channel length information to the mobile phone by using a dedicated message. 503.
  • the second device sends a preset descrambling identifier to the first device.
  • the preset descrambling identifier is a descrambling identifier corresponding to the scrambling processing of the resource allocation information by the second device.
  • the base station second device allocates a PDCCH to the first device of the user equipment to carry the resource allocation information in the preset search space, and the preset search space may include multiple PDCCHs to carry the resource allocation information sent to the first device of the different user equipment,
  • the second device of the base station marks the information when the resource allocation information is sent to the first device of the target user equipment, so that the first device of the target user equipment can correctly receive the resource allocation information, instead of the first device of the target user equipment. Receive correctly.
  • the second device performs scrambling on the resource allocation information, and sends the corresponding descrambling identifier as a preset descrambling identifier to the first device, and then sends the resource allocation information to the first device.
  • the first device can perform descrambling processing on the scrambled resource allocation information by using the preset descrambling identifier to correctly receive the resource allocation information.
  • the preset descrambling identifier sent to the first device may be a temporary identifier of the wireless network configured to the first device.
  • the search space category indicated by the preset search space configuration information sent by the second device to the first device is a common search space, and the resource allocation information may not be scrambled, or The resource allocation information is scrambled using a unified scrambling flag and the corresponding descrambling flag is transmitted as a preset descrambling identifier to the first device through the system broadcast.
  • the search space category indicated by the preset search space configuration information sent by the second device to the first device is a dedicated search space, because the resource allocation information in the dedicated search space is sent to a certain search space.
  • the second device can send the preset descrambling identifier to the first device by using a dedicated message.
  • the second device sends the scrambled resource allocation information to the first device, only the first device can correctly descramble the resource allocation information because only the first device receives the preset descrambling identifier.
  • the steps 501, 502, and 503 have no sequence, and may be sent once or multiple times.
  • the present invention does not limit the specific sending manner.
  • the first device performs blind detection according to scheduling control channel length information in a preset search space.
  • the resource allocation information is sent.
  • the second device sends the resource allocation information to the first device in the preset search space
  • the first device cannot determine the specific location of the resource allocation information in the preset search space, so the first device is The blind search is performed in the preset search space. If the resource allocation information is detected, the data is received from the PDSCH indicated by the resource allocation information, and if the resource allocation information flag is not detected, the data is not received.
  • the blind detection process is exemplified here.
  • the scheduling control channel length may be 1, 2, 4, or 8.
  • 16 channel control units are allocated to 5 PDCCHs A, B, C, D, and E, and the corresponding scheduling control channel lengths are 4, 2, 1, 1, and 8.
  • the channel control unit allocation mode of the PDCCH is listed here, and the present invention is limited to this mode.
  • Each PDCCH that the first device needs to perform blind detection is one control channel candidate.
  • the first device will use 0 ⁇ 3, 4 ⁇ 7, 8 ⁇ 1 1 and 12 ⁇ 15 as 4 controls.
  • the channel candidate performs blind detection; if blind detection is performed according to the scheduling control channel length of 8, the first device performs blind detection as 0 control channels candidate 0 ⁇ 7, 8 ⁇ 15.
  • the process of blind detection according to other scheduling control channel lengths is the same and will not be enumerated here.
  • the process of blindly detecting the preset search space by the first device is specifically:
  • the first device starts from the preset search space starting position indicated by the preset search space configuration information, and the continuous k physical resources are in accordance with the number of physical resource units occupied by the scheduling control channel indicated by the scheduling control channel length information.
  • the unit is used as a PDCCH, that is, a control channel candidate, and descrambles the resource allocation information carried by the control channel candidate according to the preset descrambling identifier, where k is the number of physical resource units occupied by the scheduling control channel, that is, The length of the scheduling control channel when the second device sends the resource allocation information to the first device. If the descrambling fails, the k consecutive physical resource units following the control channel candidate are taken as the next PDCCH for blind detection, and so on.
  • the first device allocates resources to the ith PDCCH in the preset search space
  • the information is correctly descrambled, and the first device receives data from the PDSCH indicated by the resource allocation information. If the resource allocation information is not transmitted in the second device, the first device needs to perform blind detection on all control channel candidates in the search space.
  • the search space category indicated by the search space configuration information sent by the second device to the first device is a common search space, where the location of the common search space is the first 16 channel controls of the PDCCH region.
  • the scheduling control channel length of the PDCCH in the common search space may be 4 or 8. According to Table 2, if the scheduling control channel length is 4, corresponding to 4 control channel candidates, since each control channel candidate can carry 2 different payloads, two blind detections are performed for each control channel candidate, then 4 The number of blind detections corresponding to the control channel candidates is 8 times. If the length of the scheduling control channel is 8, corresponding to 2 control channel candidates, the number of blind detections is 4 times. In the blind detection method in the prior art, the first device needs to perform the control channel lengths according to 4 and 8 respectively, and the number of blind detections is 12 times.
  • the search space category indicated by the search space configuration information sent by the second device to the first device is a dedicated search space
  • the first channel control unit location of the dedicated search space is Parameters such as frame number and cell wireless network temporary identifier are calculated by a hash function.
  • the scheduling control channel length of the PDCCH in the dedicated search space may be 1, 2, 4, or 8, and the number of control channel candidates corresponding to each scheduling control channel length and the corresponding number of blind detections are shown in Table 3.
  • the first device only needs to perform blind detection according to one of the scheduling control channel lengths, that is, 1, 2, 4 or 8, and the number of detections is 12 or 4 times.
  • the first device performs blind detection according to the length of each scheduling control channel, and the number of blind detections is the sum of the blind detection times corresponding to the lengths of the respective scheduling control channels, that is, 32 times. It can be seen that the blind detection method provided by the embodiment of the present invention can reduce the number of blind detections of the first device, thereby improving the efficiency of blind detection of the first device and reducing the power consumed by the first device due to blind detection.
  • the second device sends a scheduling control channel to the first device according to the scheduling control channel length information.
  • the PDCCH is sent to the first device according to the length of the scheduling control channel, that is, the PDCCH length is the length of the scheduling control channel.
  • the first device performs blind detection according to scheduling control channel length information in a preset search space.
  • step 506 The method of performing blind detection in step 506 is the same as in step 504.
  • the preset search space includes only one resource allocation information that is sent to the first device, so after the first device correctly receives the resource allocation information carried by the preset PDCCH in the search space, Stop blind detection in the preset search space.
  • Step 504 is the same as the blind detection method in step 506, and the number of blind detections may be different.
  • the first device since the second device does not send the resource allocation information to the first device in the search space, the first device performs blind detection on all control channel candidates in the preset search space according to the scheduling control channel length.
  • the second device since the second device has transmitted the resource allocation information to the first device in the search space, the first device can detect the resource allocation information and stop the blind detection after detecting the resource allocation information. Therefore, the number of blind detections in step 504 is the maximum number of blind detections in step 506.
  • the data transmission method provided by the embodiment of the present invention sends the preset search space configuration information by the second device, the second device sends the scheduling control channel length information, and the second device sends the preset descrambling identifier to the first device, where the first device
  • the second device sends a scheduling control channel to the first device according to the scheduling control channel length information in the preset search space, and the first device performs the scheduling control channel length information in the preset search space.
  • blind when the first device detects the resource allocation information, stops the blind detection in the preset search space, so that the first device only needs to perform blind detection in the preset search space according to the scheduling control channel length information sent by the second device.
  • the number of blind detections of the first device is reduced, thereby improving the efficiency of blind detection of the first device and reducing the blindness of the first device.
  • the amount of power consumed by the test is reduced.
  • the embodiment of the present invention provides another data transmission method, where the second device is a base station, and the first device is a mobile phone, and the base station sends resource allocation information to the mobile phone in a group manner, which can improve the number of times of blind detection of the mobile phone.
  • the utilization efficiency of physical resources in a sub-frame includes the following steps:
  • the second device sends preset search space configuration information.
  • the preset search space configuration information includes location information of the preset search space, and the location information of the preset search space is used to indicate time-frequency resources occupied by the preset search space.
  • Preset search space The type of search space indicated by the configuration information is group-specific search space, and each resource allocation information in the group-specific search space can be correctly received only by the mobile phone in a certain group. In this embodiment, a group-specific search space is used as a preset search space.
  • the base station uses a plurality of mobile phones as a group, allocates a PDCCH to the group as a whole in the group-specific search space, and transmits resource allocation information through the channel. In this way, only one PDCCH and one PDSCH are needed to transmit resource allocation information and data to mobile phones in a group, thereby improving the utilization efficiency of physical resources in one subframe.
  • the range of the group-specific search space in the PDCCH area may be configured according to actual conditions.
  • the location information of the group-specific search space may be a frequency domain resource range corresponding to the search space, for example, a frequency domain bandwidth occupied by the group-specific search space, a sub-carrier, and the like.
  • the configuration information of the group-specific search space includes: a cell radio network temporary identifier of the group and location information of the control channel candidate of the group.
  • the location information of the control channel candidate of the group may be the location of the physical resource block where the group-specific search space is located.
  • the base station may send the physical resource block index of the physical resource block where the group-specific search space is located to the group.
  • the mobile phone in the group; the location information of the control channel candidate of the group may also be an OFDM (Orthogonal Frequency Division Multiplexing) symbol in which the group-specific search space is located; further, the control channel candidate of the group Location information can also be a group
  • the index of the preset PDCCH in the group-specific search space for example, the group-specific search space includes 10 PDCCHs, and the index indicates one of the 10 PDCCHs as the preset PDCCH, and the mobile phone directly from the location indicated by the index Blind detection is performed according to the length of the scheduling control channel.
  • the configuration information of the group-specific search space may further include a group service identifier, and the base station uses the mobile phone that performs the same service as a group and sends resource allocation information to the group.
  • the present invention does not limit the specific division manner of the group.
  • the base station may send the group-specific search space configuration information to the mobile phone in the group through a dedicated message.
  • the second device sends scheduling control channel length information.
  • the base station may determine, according to the size of the coverage area of the group, scheduling control required by the group preset PDCCH.
  • the channel length that is, the mobile phone in a certain coverage area can correctly receive the resource allocation information carried by the preset PDCCH of the group.
  • the length of the scheduling control channel required for selecting the mobile phone that is the farthest from the base station is the length of the scheduling control channel, and the length of the scheduling control channel can be Each mobile phone in the group sends resource allocation information.
  • the base station may determine, according to the signal quality of the mobile phone in the group, a scheduling control channel length of the group preset PDCCH. Specifically, the worse the signal quality is, the higher the length of the required scheduling control channel is.
  • the length of the scheduling control channel required by the mobile phone with the worst signal quality is the length of the scheduling control channel, and the length of the scheduling control channel can be used to the group.
  • Each mobile phone within it sends resource allocation information. In this way, the base station needs to pre-evaluate the signal quality of the mobile phone in the group. For the accuracy of the evaluation, the base station can instruct the mobile phone to report the signal quality information.
  • the scheduling control channel length may be selected from two or more possible values, and the specific number may be selected according to actual conditions.
  • the base station needs different scheduling control channel lengths for transmitting resource allocation information to different groups of mobile phones. If only one scheduling control channel length is used, in order to enable different groups to correctly receive resource allocation information, the scheduling control channel length should select the largest one of a plurality of possible values, which will make use of the search space physical resources. low efficiency. Therefore, different scheduling control channel lengths are selected for different groups, compared to using a single Scheduling the control channel length can improve the utilization efficiency of physical resources in the search space.
  • the base station After determining the length of the scheduling control channel, the base station generates scheduling control channel length information, and sends the scheduling control channel length information to the mobile phone in the group.
  • the second device sends a preset descrambling identifier to the first device.
  • the base station When the base station transmits resource allocation information to a mobile phone in a certain group, the base station performs scrambling processing on the resource allocation information.
  • the base station sends the preset descrambling identifier to the mobile phone in the group in advance, so that the mobile phone in the group can correctly descramble the resource allocation information.
  • the preset descrambling identifier may be a cell wireless network temporary identifier of the group.
  • the step 601 to the step 603 have no sequence, and may be sent once or multiple times.
  • the present invention does not limit the specific sending manner.
  • the first device performs blind detection according to scheduling control channel length information in a preset search space.
  • the mobile phone performs blind detection according to the length of the scheduling control channel in the location indicated by the group-specific search space configuration information.
  • the second device sends a scheduling control channel to the first device according to the scheduling control channel length information.
  • the preset search space configuration information received by the first device further includes category information of the preset search space, and the category information of the preset search space indicates that the preset search space is a group-specific search space.
  • the preset search space configuration information further includes the identifier information of the preset subframe, and the identifier information of the preset subframe is a subframe used to indicate the bearer scheduling control channel.
  • the same frequency domain resource in different subframes may be time-division multiplexed, that is, the PDCCH may be used as the preset PDCCH of different groups in the same location of the different subframes.
  • the base station treats consecutive 5 subframes as one cycle, and uses the PDCCH of the same location in the group-specific search space on each subframe in the loop as the preset PDCCH of 5 different groups.
  • the base station sends resource allocation information to the mobile phone of the first group in the first subframe of the cycle, and sends resource allocation information to the mobile phone of the second group in the second subframe of the cycle, and so on.
  • the resource allocation information is sent to the five groups in turn in the second cycle. Then, for the mobile phone in the first group, only blind detection is needed in the first subframe in one cycle, and blind detection is not required in 5 subframes in the loop.
  • the mobile phones in the other 4 groups only need to follow one Blind detection is performed within one subframe in the ring. It is not necessary to perform blind detection in 5 subframes in the loop.
  • the number of subframes included in each loop can be configured according to actual conditions.
  • the time division multiplexing method of the same frequency domain resource makes the mobile phone in the group do not need to be blindly detected in each subframe, thereby reducing the number of blind detection of the mobile phone, thereby improving the efficiency of blind detection of the mobile phone and Reduces the amount of power the phone consumes due to blind detection.
  • the first device performs blind detection according to scheduling control channel length information in a preset search space.
  • step 606 The method of performing blind detection in step 606 is the same as in step 604.
  • the group-specific search space includes only one resource allocation information sent to the group, so when the mobile phone in the group correctly receives the resource allocation carried by the preset PDCCH in the search space. After the information, the blind detection in the group-specific search space is stopped.
  • Step 604 is the same as the blind detection method in step 606, and the number of blind detections may be different.
  • the base station since the base station does not send resource allocation information to the mobile phone in the group-specific search space, the mobile phone blindly detects all control signal candidates in the search space according to the scheduling control channel length.
  • the base station since the base station has transmitted the resource allocation information to the mobile phone in the search space, the user can detect the resource allocation information and stop the blind detection after detecting the resource allocation information. Therefore, the number of blind detections in step 604 is the maximum value of the number of blind detections in step 606.
  • the data processing method provided by the embodiment of the present invention sends a group-specific search space configuration information to a mobile phone through a base station, and sends a scheduling control channel length information and a preset descrambling identifier to the mobile phone in the group, where the base station is in different subframes.
  • the same frequency domain resource is time-division multiplexed, and the resource allocation information is sent to different group mobile phones in different subframes, so that the group mobile phone does not need to perform blind detection in each subframe, thereby reducing the number of blind detection of the mobile phone.
  • the blind detection efficiency of the mobile phone is improved and the power consumption of the mobile phone due to blind detection is reduced, and the utilization efficiency of the physical resources in the subframe is improved.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer. Taking this as an example, but not limited to:
  • the computer readable medium may include RAM ( Random Access
  • ROM Read Only Memory
  • EEPROM Electrically Erasable Programmable Read Only Memory
  • CD-ROM Compact Disc Read Only Memory
  • Any connection may suitably be a computer readable medium.
  • the disc and the disc include a CD (Compact Disc), a laser disc, a disc, a DVD disc (Digital Versatile Disc), a floppy disc, and a Blu-ray disc, wherein the disc is usually magnetically copied, The disc uses a laser to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

Abstract

本发明公开了一种数据传输方法及设备,涉及通信领域,能够解决用户设备对调度控制信道进行盲检测时效率低,耗电过多的问题。具体方案为:第一设备接收调度控制信道长度信息,第一设备在预设搜索空间内按照调度控制信道长度信息进行盲检测,第一设备检测到调度控制信道长度信息对应的调度控制信道后,获取调度控制信道所承载的所述资源分配信息,本发明用于数据传输。

Description

一种数据传输方法及设备
技术领域
本发明涉及通信领域, 尤其涉及一种数据传输方法及设备。
背景技术
在 LTE (英文: Long Term Evolution; 简称: 长期演进) 通信系统的 下行传输中, eNB (英文: evolved Node B ; 简称: 演进型基站)通常以子帧 为单位进行数据传输, 一个子帧长度为 1毫秒, 一个子帧包含物理下行共 享信道(英文: Physical Downlink Shared Channel; 简称: PDSCH)区域以及 物理下行控制信道(英文: Physical Downlink Control Channel; 简称: PDCCH )区域,其中, PDSCH用于承载 eNB发送给用户设备的数据, PDCCH 用于承载 eNB发送给用户设备的资源分配信息。 为合理利用 PDCCH区域 的物理资源, eNB将 PDCCH区域划分为不同的子区域, 每个子区域为一 个搜索空间。
eNB通过搜索空间内的 PDCCH向给用户设备发送资源分配信息。 用 户设备为了接收基站在搜索空间内发送的资源分配信息, 对搜索空间内的 PDCCH进行盲检测, 如果用户设备检测到 eNB发送给该用户设备的资源 分配信息, 则该用户设备接收该资源分配信息。
在搜索空间内, 一个 PDCCH承载一条资源分配信息, 由于不同资源 分配信息长度不完全相同, 承载不同资源分配信息的不同 PDCCH所占用 的物理资源单元数量, 即调度控制信道长度也不完全相同。 因此, 用户设 备进行盲检测时, 分别按照各种可能的调度控制信道长度在搜索空间内进 行盲检测, 导致用户设备盲检测效率低且耗电过多。
发明内容
本发明的实施例提供一种数据传输方法及设备, 能够提高用户设备盲 检测的效率并减少用户设备因盲检测而消耗的电量。
为达到上述目的, 本发明的实施例采用如下技术方案:
第一方面, 一种数据传输设备, 包括:
接收单元, 用于接收调度控制信道长度信息, 所述调度控制信道长度 信息包括调度控制信道所占用的物理资源单元的数量, 所述调度控制信道 为向所述数据传输设备发送资源分配信息时的控制信道;
处理单元,用于在预设搜索空间内按照所述接收单元接收的调度控制 信道长度信息进行盲检测, 当检测到所述调度控制信道长度信息对应的调 度控制信道后, 获取所述调度控制信道所承载的所述资源分配信息, 所述 预设搜索空间为用于承载所述资源分配信, 的搜索空间。
结合第一方面, 在第一种可能的实现方式中,
所述接收单元, 还用于接收预设搜索空间配置信息, 所述预设搜索空 间配置信息包括所述预设搜索空间的位置信息, 其中, 所述预设搜索空间 的位置信息用于指示所述预设搜索空间占用的时频资源。
结合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,
所述接收单元所接收的预设搜索空间配置信息还包括:所述预设搜索 空间的类别信息, 所述预设搜索空间的类别信息用于指示所述预设搜索空 间的类别, 所述预设搜索空间的类别包括: 公共搜索空间、 专用搜索空间 或者群组专用搜索空间。
结合第一方面的第一种可能的实现方式, 在第三种可能的实现方式 中,
当所述接收单元接收的所述预设搜索空间配置信息还包括预设搜索 空间的类别信息且所述预设搜索空间的类别信息指示所述预设搜索空间为 群组专用搜索空间时, 所述预设搜索空间配置信息还包括预设子帧的标识 信息,所述预设子帧的标识信息为用于指示承载所述调度控制信道的子帧; 所述处理单元, 还用于根据所述接收单元接收的预设子帧的标识信 息, 在所述预设子帧上的所述预设搜索空间内按照所述调度控制信道长度 信息进行盲检测。
结合第一方面至第一方面的第三种可能的实现方式中的任一种,在第 四种可能的实现方式中,
所述接收单元接收的所述调度控制信道长度信息为以下一种: 所述调度控制信道所占用的信道控制单元 CCE数量;
所述调度控制信道所占用的子载波数量; 所述调度控制信道所占用的物理符号数量;
所述调度控制信道所对应的调度控制信道长度。
结合第一方面至第一方面的第三种可能的实现方式中的任一种,在第 五种可能的实现方式中,
所述处理单元, 具体用于在所述预设搜索空间内, 按照所述调度控制 信道长度信息所指示的调度控制信道所占用的物理资源单元的数量, 将连 续的 k个所述物理资源单元作为一个调度控制信道, 根据预设解扰标识对 所述预设搜索空间内的调度控制信道所承载的资源分配信息进行解扰, 其 中, 所述预设解扰标识为对所述资源分配信息进行加扰处理所对应的解扰 标识, k为所述调度控制信道所占用的物理资源单元的数量, 如果所述预 设搜索空间内的第 i个调度控制信道所承载的资源分配信息正确解扰, 则 所述资源分配信息为向所述第一设备发送的资源分配信息, 所述第 i个调 度控制信道为所述调度控制信道, 其中, 所述 i为大于 0的整数。
第二方面, 一种数据传输设备, 包括:
处理单元, 用于获取调度控制信道长度信息, 所述调度控制信道长度 信息包括所述调度控制信道所占用的物理资源单元的数量, 所述调度控制 信道为向第一设备发送资源分配信息时的控制信道;
发送单元, 用于发送所述处理单元获取的调度控制信道长度信息; 所述处理单元,用于根据所述获取的调度控制信道长度信息配置所述 调度控制信道的长度;
所述发送单元,用于在所述处理单元完成对所述调度控制信道的长度 配置后, 向所述第一设备发送所述调度控制信道。
结合第二方面, 在第一种可能的实现方式中,
所述发送单元, 还用于发送预设搜索空间配置信息, 所述预设搜索空 间配置信息包括所述预设搜索空间的位置信息, 其中, 所述预设搜索空间 的位置信息用于指示所述预设搜索空间占用的时频资源。
结合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,
所述发送单元发送的预设搜索空间配置信息还包括: 所述预设搜索空 间的类别信息, 所述预设搜索空间的类别信息用于指示所述预设搜索空间 的类别, 所述预设搜索空间的类别包括: 公共搜索空间、 专用搜索空间或 者群组专用搜索空间。
结合第二方面至第二方面的第二种可能的实现方式,在第三种可能的 实现方式中,
所述处理单元获取的调度控制信道长度信息为以下一种:
所述调度控制信道所占用的信道控制单元 CCE数量;
所述调度控制信道所占用的子载波数量;
所述调度控制信道所占用的物理符号数量;
所述调度控制信道所对应的调度控制信道长度。
第三方面, 一种数据传输方法, 包括:
第一设备接收调度控制信道长度信息,所述调度控制信道长度信息包 括所述调度控制信道所占用的物理资源单元的数量, 所述调度控制信道为 向所述第一设备发送资源分配信息时的控制信道;
所述第一设备在预设搜索空间内按照所述调度控制信道长度信息进 行盲检测;
所述第一设备检测到所述调度控制信道长度信息对应的调度控制信 道后, 获取所述调度控制信道所承载的所述资源分配信息, 所述预设搜索 空间为用于承载所述资源分配信, 的搜索空间。
结合第三方面, 在第一种可能的实现方式中,
所述第一设备接收调度控制信道长度信息之前, 所述方法还包括: 所述第一设备接收预设搜索空间配置信息,所述预设搜索空间配置信 息包括所述预设搜索空间的位置信息, 其中, 所述预设搜索空间的位置信 息用于指示所述预设搜索空间占用的时频资源。
结合第三面的第一种可能的实现方式, 在第二种可能的实现方式中, 所述预设搜索空间配置信息还包括: 所述预设搜索空间的类别信息, 所述预设搜索空间的类别信息用于指示所述预设搜索空间的类别, 所述预 设搜索空间的类别包括: 公共搜索空间、 专用搜索空间或者群组专用搜索 结合第三方面的第一种可能的实现方式, 在第三种可能的实现方式 中,
当所述第一设备接收的所述预设搜索空间配置信息还包括预设搜索 空间的类别信息且所述预设搜索空间的类别信息指示所述预设搜索空间为 群组专用搜索空间时, 所述预设搜索空间配置信息还包括预设子帧的标识 信息,所述预设子帧的标识信息为用于指示承载所述调度控制信道的子帧; 所述第一设备在预设搜索空间内按照所述调度控制信道长度信息进 行盲检测, 包括:
所述第一设备根据所述预设子帧的标识信息,在所述预设子帧上的所 述预设搜索空间内按照所述调度控制信道长度信息进行盲检测。
结合第三方面至第三方面的第三种可能的实现方式中的任一种,在第 四种可能的实现方式中,
所述调度控制信道长度信息为以下一种:
所述调度控制信道所占用的信道控制单元 CCE数量;
所述调度控制信道所占用的子载波数量;
所述调度控制信道所占用的物理符号数量;
所述调度控制信道所对应的调度控制信道长度。
结合第三方面至第三方面的第三种可能的实现方式中的任一种,在第 五种可能的实现方式中,
所述第一设备在预设搜索空间内按照所述调度控制信道长度信息进 行盲检测, 包括:
所述第一设备在所述预设搜索空间内,按照所述调度控制信道长度信 息所指示的调度控制信道所占用的物理资源单元的数量, 将连续的 k个所 述物理资源单元作为一个调度控制信道, 根据预设解扰标识对所述预设搜 索空间内的调度控制信道所承载的资源分配信息进行解扰, 其中, 所述预 设解扰标识为对所述资源分配信息进行加扰处理所对应的解扰标识, k为 所述调度控制信道所占用的物理资源单元的数量;
如果所述第一设备对所述预设搜索空间内的第 i个调度控制信道所承 载的资源分配信息正确解扰, 则所述资源分配信息为向所述第一设备发送 的资源分配信息, 所述第 i个调度控制信道为所述调度控制信道, 其中, 所述 i为大于 0的整数。
第四方面, 一种数据传输方法, 包括:
第二设备发送调度控制信道长度信息,所述调度控制信道长度信息包 括所述调度控制信道所占用的物理资源单元的数量, 所述调度控制信道为 向第一设备发送资源分配信息时的控制信道;
所述第二设备根据所述调度控制信道长度信息向所述第一设备发送 所述调度控制信道。
结合第四方面, 在第一种可能的实现方式中,
所述第二设备发送调度控制信道长度信息之前, 所述方法还包括: 所述第二设备发送预设搜索空间配置信息,所述预设搜索空间配置信 息包括所述预设搜索空间的位置信息, 其中, 所述预设搜索空间的位置信 息用于指示所述预设搜索空间占用的时频资源。
结合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,
所述预设搜索空间配置信息还包括: 所述预设搜索空间的类别信息, 所述预设搜索空间的类别信息用于指示所述预设搜索空间的类别, 所述预 设搜索空间的类别包括: 公共搜索空间、 专用搜索空间或者群组专用搜索 空间。
结合第四方面至第四方面的第二种可能的实现方式,在第三种可能的 实现方式中,
所述调度控制信道长度信息为以下一种:
所述调度控制信道所占用的信道控制单元 CCE数量;
所述调度控制信道所占用的子载波数量;
所述调度控制信道所占用的物理符号数量;
所述调度控制信道所对应的调度控制信道长度。
本发明的实施例提供的数据传输方法及设备, 由于第二设备已经先将 调度控制信道长度发送给第一设备, 使得第一设备只需要按照调度控制信 道长度在预设搜索空间内进行盲检测, 与现有技术相比, 不需要再按照其 它调度控制信道长度在预设搜索空间内进行盲检测就能接收到资源分配信 息。 进一步的, 第二设备通过群组专用搜索空间向第一设备发送资源分配 信息时, 第二设备向第一设备发送预设子帧标识, 使得第一设备只需要在 预设子帧标识所指示的子帧内进行盲检测, 而不需要在每个子帧内都进行 盲检测。 本发明的实施例提供的盲检测方法, 减少了第一设备盲检测的次 数, 从而提高了第一设备的盲检测效率, 并减少了第一设备因为盲检测而 消耗的电量。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中 的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不 付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明的实施例提供的一种数据传输设备结构示意图; 图 2为本发明的实施例提供的另一种数据传输设备结构示意图; 图 3为本发明的实施例提供的一种数据传输方法流程示意图; 图 4为本发明的实施例提供的另一种数据传输方法流程示意图; 图 5为本发明的实施例提供的再一种数据传输方法流程示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进 行清楚、 完整地描述, 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他实施例, 都属于本发明保护的 范围。
本发明的实施例提一种数据传输设备, 参照图 1所示, 该设备 101 包 括接收单元 101 1、 处理单元 1012。
其中, 接收单元 101 1 , 用于接收调度控制信道长度信息, 调度控制 信道长度信息包括调度控制信道所占用的物理资源单元的数量, 调度控制 信道为向数据传输设备发送资源分配信息时的控制信道。
处理单元 1012 , 用于在预设搜索空间内按照调度控制信道长度信息 进行盲检测,当检测到所述调度控制信道长度信息对应的调度控制信道后, 获取所述调度控制信道所承载的所述资源分配信息, 所述预设搜索空间为 用于承载所述资源分配信息的搜索空间。
本发明的实施例提供的数据传输设备,通过接收数据传输设备长度信 息, 按照数据传输设备长度在预设搜索空间内进行盲检测就能接收到资源 分配信息, 而不需要再按照其它数据传输设备长度在预设搜索空间内进行 盲检测, 由此减少了数据传输设备盲检测的次数, 从而提高了数据传输设 备的盲检测效率, 并减少了数据传输设备因为盲检测而消耗的电量。
可选的, 接收单元 101 1 , 还用于接收预设搜索空间配置信息, 预设 搜索空间配置信息包括预设搜索空间的位置信息, 其中, 预设搜索空间的 位置信息用于指示预设搜索空间占用的时频资源。
可选的,所述接收单元 101 1所接收的预设搜索空间配置信息还包括: 预设搜索空间的类别信息, 预设搜索空间的类别信息用于指示预设搜索空 间的类别, 预设搜索空间的类别包括: 公共搜索空间、 专用搜索空间或者 群组专用搜索空间。
可选的, 当接收单元 101 1接收的预设搜索空间配置信息还包括预设 搜索空间的类别信息且所述预设搜索空间的类别信息指示所述预设搜索空 间为群组专用搜索空间时, 预设搜索空间配置信息还包括预设子帧的标识 信息, 预设子帧的标识信息为用于指示承载调度控制信道的子帧。
处理单元 1012 , 还用于 居接收单元 101 1接收的预设子帧的标识信 息, 在预设子帧上的预设搜索空间内按照调度控制信道长度信息进行盲检 测。
可选的, 接收单元 101 1接收的调度控制信道长度信息为以下一种: 调度控制信道长度信息为以下一种:
调度控制信道所占用的信道控制单元 CCE数量。
调度控制信道所占用的子载波数量。
调度控制信道所占用的物理符号数量。
调度控制信道所对应的调度控制信道长度。
可选的, 处理单元 1012 , 具体用于在所述预设搜索空间内, 按照调 度控制信道长度信息所指示的调度控制信道所占用的物理资源单元的数 量, 将连续的 k个所述物理资源单元作为一个调度控制信道, 根据预设解 扰标识对所述预设搜索空间内的调度控制信道所承载的资源分配信息进行 解扰, 其中, 所述预设解扰标识为对所述资源分配信息进行加扰处理所对 应的解扰标识, k为调度控制信道所占用的物理资源单元的数量; 如果所 述预设搜索空间内的第 i个调度控制信道所承载的资源分配信息正确解扰, 则所述资源分配信息为向所述数据传输设备发送的资源分配信息, 所述第 i个调度控制信道为所述调度控制信道, 其中, 所述 i为大于 0的整数。
相应的, 图 1所示实施例中的接收单元所对应的硬件设备可以为接收 器, 处理单元所对应的硬件设备可以为处理器。
本发明的实施例提供的数据传输设备,通过接收调度控制信道长度信 息, 按照调度控制信道长度在预设搜索空间内进行盲检测就能接收到资源 分配信息, 而不需要再按照其它调度控制信道长度在预设搜索空间内进行 盲检测, 由此减少了数据传输设备盲检测的次数, 从而提高了数据传输设 备的盲检测效率, 并减少了数据传输设备因为盲检测而消耗的电量。
本发明的实施例提另一种数据传输设备, 参照图 2所示, 该设备 201 包括发送单元 2011和处理单元 2012。
其中, 处理单元 2012 , 用于获取调度控制信道长度信息, 调度控制 信道长度信息包括调度控制信道所占用的物理资源单元的数量, 调度控制 信道为向第一设备发送资源分配信息时的控制信道。
发送单元 2011 , 用于发送处理单元获取的调度控制信道长度信息。 处理单元 2012 , 用于根据获取的调度控制信道长度信息配置调度控 制信道的长度。
发送单元 2011 , 用于在处理单元 2012完成对调度控制信道的长度配 置后, 向第一设备发送调度控制信道。
本发明的实施例提供的数据传输设备,通过向第一设备发送调度控制 信道长度信息, 以使得第一设备按照调度控制信道长度在预设搜索空间内 进行盲检测就能接收到资源分配信息, 而不需要再按照其它调度控制信道 长度在预设搜索空间内进行盲检测, 由此减少了第一设备盲检测的次数, 从而提高了第一设备的盲检测效率, 并减少了第一设备因为盲检测而消耗 的电量。
可选的, 发送单元 201 1 , 还用于发送预设搜索空间配置信息, 预设 搜索空间配置信息包括预设搜索空间的位置信息, 其中, 预设搜索空间的 位置信息用于指示预设搜索空间占用的时频资源。
可选的, 发送单元 201 1发送的预设搜索空间配置信息还包括: 预设 搜索空间的类别信息, 预设搜索空间的类别信息用于指示预设搜索空间的 类别, 预设搜索空间的类别包括: 公共搜索空间、 专用搜索空间或者群组 专用搜索空间。
可选的, 处理单元 2012获取的调度控制信道长度信息为以下一种: 调度控制信道所占用的信道控制单元 CCE数量。
调度控制信道所占用的子载波数量。
调度控制信道所占用的物理符号数量。
调度控制信道所对应的调度控制信道长度。
相应的, 图 2所示实施例中的接收单元所对应的硬件设备可以为接收 器, 处理单元所对应的硬件设备可以为处理器。
本发明的实施例提供的数据传输设备,通过向第一设备发送调度控制 信道长度信息, 以使得第一设备按照调度控制信道长度在预设搜索空间内 进行盲检测就能接收到资源分配信息, 而不需要再按照其它调度控制信道 长度在预设搜索空间内进行盲检测, 由此减少了第一设备盲检测的次数, 从而提高了第一设备的盲检测效率, 并减少了第一设备因为盲检测而消耗 的电量。
本发明的实施例提供一种数据传输方法, 应用于无线通信领域, 在此 以 LTE无线通信系统为例进行说明, 这并不代表本发明的实施例所 提供的方法只能适用于 LTE无线通信系统。 参照图 3所示, 包括以下 步骤:
301、 第一设备接收调度控制信道长度信息。
其中,调度控制信道长度信息包括所述调度控制信道所占用的物理资 源单元的数量, 所述调度控制信道为向所述第一设备发送资源分配信息时 的控制信道。
在一种应用场景中, 第一设备是手机, 该第一设备可以接收基站 发送的调度控制信道长度信息。 调度控制信道可以是基站发送给该手 机的物理下行控制信道(PDCCH , Physical downlink control channel) , 也可以是其他手机发送给该手机的调度指派(Scheduling
assignment)。 本实施例以 PDCCH作为调度控制信道进行示例性说 明。
在 LTE通信系统的下行传输中, 基站通常以子帧为单位进行数据传 输, 一个子帧在时域和频域上包含多个物理资源单元, 这些物理资源单元 被划分为 PDCCH区域以及 PDSCH区域两部分。
PDCCH区域, 还可以进一步划分为不同的子区域, 每个子区域为一 个搜索空间, 不同搜索空间可以用于承载不同类型的资源分配信息。 基站 可以对某一个搜索空间在 PDCCH区域内的位置进行配置。
在一种应用场景中, 基站向用户设备发送数据时, 为用户设备 分配一个 PDSCH以承载数据, 同时在一个搜索空间内为用户设备分配 一个 PDCCH以承载资源分配信息, 可选的, 该资源分配信息可以包括下 列至少一种: 一、 指示用于传输数据的资源位置, 比如: 传输数据所占用 资源对应的物理资源块位置索引, 传输数据所占用资源对应的物理资源块 组的位置索引; 二、 指示用于传输数据的资源格式, 比如: 调制编码方式, BPSK ( Binary Phase Shift Keying , 二进制移相键控 ) , QPSK ( Quadrature Phase Shift Keying , 正交相移键控 ) , 16QAM ( Quadrature Amplitude Modulation , 正交振幅调制 ) , 64Q AM等。 用户设备根据该资源分配信息 从分配给用户设备的 PDSCH上接收数据。 由于不同资源分配信息长度不 完全相同, 承载不同资源分配信息的不同 PDCCH所占用的物理资源单元 数量也不完全相同, 一个 PDCCH所占用的物理资源单元数量被称为该 PDCCH的调度控制信道长度。
本实施例中, 第一设备接收调度控制信道长度信息, 并通过该调度控 制信道长度信息确定调度控制信道长度。 当第一设备接收基站发送的资源 分配信息时, 第一设备以该调度控制信道长度作为基站向第一设备发送资 源分配信息时 PDCCH的长度。
302、 第一设备在预设搜索空间内按照调度控制信道长度信息进行盲 检测。
由于第一设备不能确定基站是否在预设搜索空间内向该用户设备发 送了资源分配信息, 当基站在预设搜索空间内向该用户设备发送了资源分 配信息时, 第一设备也不能确定资源分配信息在预设搜索空间中的具体位 置, 因此第一设备以在预设搜索空间内进行盲检测的方式接收基站向该用 户设备发送的资源分配信息。
基站在向用户设备发送资源分配信息时,可以对资源分配信息进行标 记, 如果第一设备在盲检测中检测到该标记, 则代表该资源分配信息为基 站发送给第一设备的资源分配信息, 那么第一设备从资源分配信息所指示 的 PDSCH上接收数据, 如果没有检测到资源分配信息标记, 则不接收数 据。
现有技术中, 第一设备按照各种可能的调度控制信道长度, 在预设搜 索空间内进行盲检测。 本发明的实施例提供的盲检测方法, 由于基站已经 先将调度控制信道长度发送给第一设备, 使得第一设备只需要按照第一设 备发送的调度控制信道长度在预设搜索空间内进行盲检测就能接收到资源 分配信息, 而不需要再按照其它调度控制信道长度在预设搜索空间内进行 盲检测, 由此减少了第一设备盲检测的次数, 从而提高了第一设备的盲检 测效率, 并减少了第一设备因为盲检测而消耗的电量。
本发明的实施例提供另一种数据传输方法, 参照图 4所示, 包括以下 步骤:
401、 第二设备发送调度控制信道长度信息。
其中,调度控制信道长度信息包括所述调度控制信道所占用的物理资 源单元的数量, 调度控制信道为向第一设备发送资源分配信息时的控制信 道。
在一种应用场景中, 第二设备是基站, 第一设备是手机, 调度控制 信道可以是基站发送给该手机的 PDCCH , 也可以是其他手机发送给 该手机的调度指派。本实施例以 PDCCH作为调度控制信道进行示例 性说明。
第二设备将承载资源分配信息所需要的 PDCCH长度通过调度控制信 道长度信息下发给第一设备, 以便第一设备按照调度控制信道长度信息确 定调度控制信道长度并在预设搜索空间内进行盲检测。
402、 第二设备根据调度控制信道长度信息向第一设备发送调度控制 信道。
第二设备在向第一设备发送资源分配信息时,按照调度控制信道长度 为第一设备分配 PDCCH, 即该 PDCCH的长度为调度控制信道长度。
本发明的实施例提供的数据传输方法,基站先将调度控制信道长度发 送给第一设备, 后再向第一设备发送资源分配信息, 资源分配信息所占用 PDCCH的长度为调度控制信道长度, 这样, 第一设备只需按照调度控制信 道长度在调度控制信道所在的搜索空间内进行盲检测, 而不用再按照其它 调度控制信道长度在调度控制信道所在的搜索空间内进行盲检测。 由此减 少了第一设备盲检测的次数, 从而提高了第一设备盲检测效率并减少了第 一设备因为盲检测而消耗的电量。
本发明的实施例提供再一种数据传输方法, 应用于 LTE无线通信系 统。 在本实施例中, 第二设备为 eNB , 第一设备为手机。 参照图 5所示, 包括以下步骤:
501、 第二设备发送预设搜索空间配置信息。
其中, 可选的, 预设搜索空间配置信息包括: 预设搜索空间的位置信 息、 预设搜索空间的类别信息, 预设搜索空间的位置信息用于指示预设搜 索空间占用的时频资源, 预设搜索空间的类别信息用于指示所述预设搜索 空间的类别。 具体可选的, 第一设备可以是基站。
预设搜索空间的位置为预设搜索空间在 PDCCH区域内的位置。 预设 搜索空间的位置信息可以是预设搜索空间所占用的频域或时域资源,比如, 预设搜索空间所占用的频域带宽、 子载波等。
可选的, 预设搜索空间的类别可以是公共搜索空间, 第二设备在公共 搜索空间内发送的资源分配信息, 小区内的用户设备都能够正确接收。 进 一步可选的, 第二设备将小区的下行带宽信息作为预设搜索空间的位置信 息发送给用户设备。
可选的, 预设搜索空间的类别可以是专用搜索空间, 专用搜索空间内 的每一条资源分配信息, 只有某一个用户设备能够正确接收。 进一步可选 的, 第二设备将小区无线网络临时标识作为预设搜索空间的位置信息发送 给用户设备。
可选的,第二设备通过系统广播或者专用消息将搜索空间配置信息发 送给该第二设备覆盖区域内的用户设备。
502、 第二设备发送调度控制信道长度信息。
其中,调度控制信道长度信息包括调度控制信道所占用的物理资源单 元的数量, 调度控制信道为向第一设备发送资源分配信息时的控制信道。 调度控制信道可以是第二设备发送给第一设备的 PDCCH , 也可以是 第一设备之外的其他终端设备发送给第二设备的调度指派。 本实施 例以以 PDCCH作为调度控制信道进行示例性说明。
由于物理资源单元可以有多种形式,相应的 PDCCH长度也有多种形 式。
可选的, 调度控制信道长度可以是以下任意一种:
调度控制信道所占用的 CCE (信道控制单元, Channel Control Element ) 数量;
调度控制信道所占用的子载波数量;
调度控制信道所占用的物理符号数量;
调度控制信道所对应的调度控制信道长度。
本发明对具体的物理资源形式不做限制,在本实施例中仅以信道控制 单元为例进行说明。
如果第二设备向第一设备发送的预设搜索空间配置信息所指示的搜 索空间类别是公共搜索空间, 那么第二设备可以通过系统广播将调度控制 信道长度信息发送给该第一设备;
如果第二设备向第一设备发送的预设搜索空间配置信息所指示的搜 索空间类别是专用搜索空间, 那么第二设备可以通过专用消息将调度控制 信道长度信息发送给该手机。 503、 第二设备向第一设备发送预设解扰标识。
其中,预设解扰标识为第二设备对资源分配信息进行加扰处理所对应 的解扰标识。
基站第二设备在预设搜索空间内为用户设备第一设备分配 PDCCH以 承载资源分配信息, 预设搜索空间内可以包括多个 PDCCH以承载发给不 同用户设备第一设备的资源分配信息, 因此, 基站第二设备在向目标用户 设备第一设备发送资源分配信息时对该信息进行标记, 以使得该目标用户 设备第一设备能够正确接收该资源分配信息, 而非目标用户设备第一设备 无法正确接收。
可选的, 第二设备对资源分配信息进行加扰处理, 并将相应的解扰标 识作为预设解扰标识发送给第一设备, 然后将资源分配信息发送给第一设 备。 这样, 第一设备就能够通过预设解扰标识对经过加扰处理的资源分配 信息进行解扰处理从而正确接收资源分配信息。 进一步可选的, 发送给第 一设备的预设解扰标识可以为配置给第一设备的无线网络临时标识。
可选的, 在一种应用场景中, 第二设备向第一设备发送的预设搜索空 间配置信息所指示的搜索空间类别是公共搜索空间, 则可以不用对资源分 配信息进行加扰, 或者对资源分配信息使用统一的加扰标志进行加扰并将 相应的解扰标志作为预设解扰标识通过系统广播发送给第一设备。
可选的, 在一种应用场景中, 第二设备向第一设备发送的预设搜索空 间配置信息所指示的搜索空间类别是专用搜索空间, 由于专用搜索空间内 的资源分配信息是发送给某个特定设备的, 此处为第一设备, 那么第二设 备可以通过专用消息将预设解扰标识发送给第一设备。 当第二设备向该第 一设备发送经过加扰处理的资源分配信息时, 由于只有第一设备接收到预 设解扰标识, 则只有第一设备能够正确解扰资源分配信息。
可选的, 步骤 501、 502、 503没有先后顺序, 可以一次发送也可以分 多次发送, 本发明对具体的发送方式不做限制。
504、 第一设备在预设搜索空间内按照调度控制信道长度信息进行盲 检测。
由于第一设备不能确定第二设备是否在预设搜索空间内向第一设备 发送了资源分配信息, 当第二设备在预设搜索空间内向第一设备发送了资 源分配信息时, 第一设备也不能确定资源分配信息在预设搜索空间中的具 体位置, 因此第一设备在预设搜索空间内进行盲检测, 如果检测到资源分 配信息, 则从资源分配信息所指示的 PDSCH上接收数据, 如果没有检测 到资源分配信息标记, 则不接收数据。
在此对盲检测过程进行举例说明。
可选的, 在一种应用场景中, 调度控制信道长度可以为 1、 2、 4或 8。 参照表一, 将 16个信道控制单元分配给 5个 PDCCHA、 B、 C、 D、 E, 分 别对应的调度控制信道长度为 4、 2、 1、 1、 8。 当然, 此处只是列举了一 种 PDCCH的信道控制单元分配方式, 表本发明只局限于这种方式。
Figure imgf000017_0001
Figure imgf000017_0002
第一设备需要进行盲检测的每一个 PDCCH为一个控制信道候选
( Candidate Control Channel ) 。 在表一所示的信道控制单元分配方式下, 如果按照调度控制信道长度为 4进行盲检测,则第一设备将 0〜3 , 4〜7 , 8〜1 1 , 12〜15作为 4个控制信道候选进行盲检测;如果按照调度控制信道长度为 8 进行盲检测, 则第一设备将 0〜7 , 8〜15作为 2个控制信道候选进行盲检测。 按照其他调度控制信道长度进行盲检测的过程相同, 在此不再列举。
第一设备对预设搜索空间进行盲检测的过程具体为:
第一设备从预设搜索空间配置信息所指示的预设搜索空间起始位置 开始, 按照调度控制信道长度信息所指示的调度控制信道所占用的物理资 源单元的数量, 将连续的 k个物理资源单元作为一个 PDCCH, 即一个控制 信道候选, 根据预设解扰标识对该控制信道候选所承载的资源分配信息进 行解扰, 其中 k为所述调度控制信道所占用的物理资源单元的数量, 即第 二设备向第一设备发送资源分配信息时的调度控制信道长度。 如果解扰失 败, 则将该控制信道候选之后连续的 k个物理资源单元作为下一个进行盲 检测的 PDCCH , 以此类推。
如果第一设备对预设搜索空间内的第 i个 PDCCH所承载的资源分配 信息正确解扰, 则第一设备从资源分配信息所指示的 PDSCH上接收数据。 如果在第二设备没有发送资源分配信息,则第一设备需要对搜索空间 内全部的控制信道候选进行盲检测。
可选的, 在一种应用场景中, 第二设备向第一设备发送的搜索空间配 置信息所指示的搜索空间类别是公共搜索空间, 该公共搜索空间的位置为 PDCCH区域的前 16个信道控制单元, 该公共搜索空间内 PDCCH的调度 控制信道长度可以为 4或 8。 结合表二, 如果调度控制信道长度为 4, 对应 4个控制信道候选, 由于每个控制信道候选可以承载 2种不同的有效载荷, 所以对每个控制信道候选要进行两次盲检测, 则 4个控制信道候选所对应 的盲检测次数为 8次。 如果调度控制信道长度为 8 , 对应 2个控制信道候 选, 盲检测次数为 4次。 现有技术中的盲检测方法, 第一设备需要分别按 照 4和 8两种调度控制信道长度进行 , 盲检测次数为 12次。
Figure imgf000018_0001
Figure imgf000018_0002
可选的, 在一种应用场景中, 第二设备向第一设备发送的搜索空间配 置信息所指示的搜索空间类别是专用搜索空间, 该专用搜索空间的第一个 信道控制单元位置, 根据子帧编号和小区无线网络临时标识等参数通过哈 希函数计算得出。 结合表三, 该专用搜索空间内 PDCCH的调度控制信道 长度可以为 1、 2、 4或 8 , 每种调度控制信道长度所对应的控制信道候选 数量及所对应的盲检测次数如表三所示, 本发明的实施例提供的盲检测方 法, 第一设备只需要按照调度控制信道长度, 即 1、 2、 4或 8中的一种进 行盲检测, 检测次数为 12或 4次。 现有技术中的盲检测方法, 第一设备按 照各个调度控制信道长度进行盲检测, 盲检测次数为各个调度控制信道长 度所对应盲检测次数的总和, 即 32次。 可见, 本发明的实施例提供的盲检 测方法, 能够减少第一设备盲检测的次数, 从而提高了第一设备盲检测的 效率并减少了第一设备因为盲检测而消耗的电量。
表三 调度控制信道长度 候选集数量 盲检测次数
1 6 12
2 6 12
4 2 4
8 2 4
505、 第二设备根据调度控制信道长度信息向第一设备发送调度控制 信道。
第二设备向第一设备发送资源分配信息时,按照调度控制信道长度为 该第一设备发送一个 PDCCH , 即该 PDCCH长度为调度控制信道长度。
506、 第一设备在预设搜索空间内按照调度控制信道长度信息进行盲 检测。
步骤 506中进行盲检测的方法与步骤 504中相同。
507、 当第一设备检测到资源分配信息后停止在预设搜索空间内的盲 检测。
可选的, 对于第一设备, 预设搜索空间内只包括一条发给第一设备的 资源分配信息, 因此当第一设备在搜索空间内正确接收预设 PDCCH所承 载的资源分配信息后, 就停止在预设搜索空间内的盲检测。
步骤 504与步骤 506中的盲检测方法相同, 盲检测次数可能不同。 步 骤 504中,由于第二设备没有在搜索空间中向第一设备发送资源分配信息, 因此第一设备按照调度控制信道长度对预设搜索空间内的全部控制信道候 选都进行盲检测。 步骤 506中, 由于第二设备已经在搜索空间中向第一设 备发送资源分配信息, 所以第一设备能够检测到资源分配信息, 并在检测 到资源分配信息后停止盲检测。因此步骤 504中的盲检测次数,是步骤 506 中的盲检测次数的最大值。
本发明的实施例提供的数据传输方法,通过第二设备发送预设搜索空 间配置信息, 第二设备发送调度控制信道长度信息, 第二设备向第一设备 发送预设解扰标识, 第一设备在预设搜索空间内按照调度控制信道长度信 息进行盲检测, 第二设备根据调度控制信道长度信息向第一设备发送调度 控制信道, 第一设备在预设搜索空间内按照调度控制信道长度信息进行盲 检测,当第一设备检测到资源分配信息后停止在预设搜索空间内的盲检测, 使得第一设备只需要按照第二设备发送的调度控制信道长度信息在预设搜 索空间内进行盲检测, 而不用再按照其它可能的调度控制信道长度信息在 预设搜索空间内进行盲检测, 减少了第一设备盲检测的次数, 从而提高了 第一设备盲检测的效率并减少了第一设备因为盲检测而消耗的电量。
本发明的实施例提供又一种数据传输方法, 第二设备为基站, 第一设 备为手机, 基站以群组方式向手机发送资源分配信息, 能够在减少手机盲 检 ί¾ 'J次数的同时提高子帧内物理资源的利用效率, 具体包括以下步骤:
601、 第二设备发送预设搜索空间配置信息。
其中, 预设搜索空间配置信息包括预设搜索空间的位置信息, 预设搜 索空间的位置信息用于指示预设搜索空间占用的时频资源。 预设搜索空间 配置信息所指示的搜索空间的类型为群组专用搜索空间, 群组专用搜索空 间内的每一条资源分配信息, 只有某一个群组内的手机能够正确接收。 本 实施例中, 以群组专用搜索空间作为预设搜索空间。
基站将若干手机作为一个群组,在群组专用搜索空间中将该群组作为 一个整体对该群组分配一个 PDCCH, 并通过该信道发送资源分配信息。 这 样, 只需要占用一个 PDCCH和一个 PDSCH, 就能够对一个群组内的手机 发送资源分配信息和数据, 从而提高了一个子帧内物理资源的利用效率。
可选的, 群组专用搜索空间在 PDCCH区域内的范围可以根据实际情 况进行配置。
可选的, 群组专用搜索空间的位置信息, 可以是该搜索空间所对应的 频域资源范围, 比如, 群组专用搜索空间所占用的频域带宽、 子载波等。
在一种应用场景中, 群组专用搜索空间的配置信息包括: 群组的小区 无线网络临时标识和群组的控制信道候选的位置信息。 可选的, 群组的控 制信道候选的位置信息可以是群组专用搜索空间所在物理资源块的位置, 具体的, 基站可以将群组专用搜索空间所在物理资源块的物理资源块索引 发送给群组内的手机; 群组的控制信道候选的位置信息也可以是群组专用 搜索空间所在的 OFDM ( Orthogonal Frequency Division Multiplexing , 正交 频分复用) 符号; 进一步的, 群组的控制信道候选的位置信息还可以是群 组专用搜索空间中预设 PDCCH的索引, 例如, 群组专用搜索空间中包括 10个 PDCCH, 该索引指示 10个 PDCCH其中之一作为预设 PDCCH, 贝' J 手机直接从该索引所指示的位置按照调度控制信道长度进行盲检测。
可选的, 群组专用搜索空间的配置信息还可以包括群组业务标识, 基 站将进行相同业务的手机作为一个群组并向该群组发送资源分配信息。 本 发明对群组的具体划分方式不做限定。
可选的,基站可以通过专用消息将群组专用搜索空间配置信息发送至 群组内手机。
602、 第二设备发送调度控制信道长度信息。
可选的, 为了确保群组内的手机都能够正确接收群组的预设 PDCCH 所承载的资源分配信息, 基站可以根据群组的覆盖区域大小, 确定该群组 预设 PDCCH所需要的调度控制信道长度, 即保证在一定覆盖区域内的手 机都能够正确接收群组的预设 PDCCH所承载的资源分配信息。 具体的, 与基站距离越远, 所需要的调度控制信道长度越高, 此处选择与基站距离 最远的手机所需要的调度控制信道长度为调度控制信道长度, 则通过调度 控制信道长度能够向群组内的每个手机发送资源分配信息。
可选的, 基站可以根据群组中手机的信号质量, 确定该群组预设 PDCCH的调度控制信道长度。 具体的, 信号质量越差, 所需要的调度控制 信道长度越高, 此处原则信号质量最差的手机所需要的调度控制信道长度 为调度控制信道长度, 则通过调度控制信道长度能够向群组内的每个手机 发送资源分配信息。 这种方式需要基站预先评估群组中手机的信号质量情 况, 为了评估准确, 基站可以指示手机报告信号质量信息。
可选的,调度控制信道长度可以从两种或两种以上可能的数值中选择 一种, 具体数字可以根据实际情况进行选择。 在一种应用场景中, 由于手 机的位置分布、 信号质量等原因, 基站对不同群组的手机发送资源分配信 息所需要的调度控制信道长度不相同。如果只使用一种调度控制信道长度, 为了能够让不同群组都能够正确接收资源分配信息, 该调度控制信道长度 要选择多种可能值中最大的一种, 这样会使得搜索空间物理资源的利用效 率低下。 因此对不同群组选择不同的调度控制信道长度, 相比使用单一的 调度控制信道长度, 能够提高搜索空间内物理资源的利用效率。 基站确定调度控制信道长度后, 生成调度控制信道长度信息, 并将该 调度控制信道长度信息发送至群组内手机。
603、 第二设备向第一设备发送预设解扰标识。
基站向某一群组内的手机发送资源分配信息时,对资源分配信息进行 加扰处理。 基站预先将预设解扰标识发送给群组内的手机, 使得该群组内 的手机都能够对资源分配信息正确解扰。 可选的, 预设解扰标识可以是群 组的小区无线网络临时标识。
可选的, 步骤 601至步骤 603没有先后顺序, 可以一次发送也可以分 多次发送, 本发明对具体的发送方式不做限制。
604、 第一设备在预设搜索空间内按照调度控制信道长度信息进行盲 检测。
具体的,手机按照调度控制信道长度在群组专用搜索空间配置信息所 指示的位置进行盲检测。
605、 第二设备根据调度控制信道长度信息向第一设备发送调度控制 信道。
可选的, 在本实施例中, 第一设备接收的预设搜索空间配置信息还包 括预设搜索空间的类别信息且预设搜索空间的类别信息指示预设搜索空间 为群组专用搜索空间,预设搜索空间配置信息还包括预设子帧的标识信息, 该预设子帧的标识信息为用于指示承载调度控制信道的子帧。 具体的, 可 以对不同子帧内的相同频域资源进行时分复用, 即基站可以将不同子帧相 同位置的 PDCCH作为不同群组的预设 PDCCH。 例如, 基站将连续的 5个 子帧作为一个循环, 将循环内每个子帧上群组专用搜索空间内相同位置的 PDCCH作为 5个不同群组的预设 PDCCH。 基站在该循环第一个子帧内向 第一个群组的手机发送资源分配信息, 在该循环第二个子帧内向第二个群 组的手机发送资源分配信息, 以此类推。 第一个循环结束后再在第二个循 环内依次向 5个群组发送资源分配信息。 那么, 对于第一个群组内的手机, 只需要在一个循环中的第一个子帧内进行盲检测, 而不需要在循环中的 5 个子帧内都进行盲检测。 同理, 其他 4个群组内的手机也都只需在一个循 环中的一个子帧内进行盲检测。 而不需要在循环中的 5个子帧内都进行盲 检测。 可选的, 每个循环包括的子帧数量可以根据实际情况配置。 这种相 同频域资源的时分复用方式, 使得群组内的手机不需要在每一个子帧内都 进行盲检测, 由此减少了手机盲检测的次数, 从而提高了手机盲检测的效 率并减少了手机因为盲检测而消耗的电量。
606、 第一设备在预设搜索空间内按照调度控制信道长度信息进行盲 检测。
步骤 606中进行盲检测的方法与步骤 604中相同。
607、 当第一设备检测到资源分配信息后停止在预设搜索空间内的盲 检测。
可选的, 对于一个群组, 群组专用搜索空间内只包括一条发给该群组 的资源分配信息, 因此当该群组内的手机在搜索空间内正确接收预设 PDCCH所承载的资源分配信息后, 即停止在群组专用搜索空间内的盲检 测。
步骤 604与步骤 606中的盲检测方法相同, 盲检测次数可能不同。 步 骤 604中,由于基站没有在群组专用搜索空间中向手机发送资源分配信息, 因此手机按照调度控制信道长度对搜索空间内的全部控制信号候选都进行 盲检测。 步骤 606中, 由于基站已经在搜索空间中向手机发送资源分配信 息, 所以用户能够检测到资源分配信息, 并在检测到资源分配信息后停止 盲检测。 因此步骤 604中的盲检测次数, 是步骤 606中的盲检测次数的最 大值。
本发明的实施例提供的数据处理方法,通过基站向手机发送群组专用 搜索空间配置信息, 并向群组内手机发送调度控制信道长度信息和预设解 扰标识, 基站对不同子帧内的相同频域资源进行时分复用, 在不同子帧内 向不同群组手机发送资源分配信息, 使得群组手机不需要在每一个子帧内 都进行盲检测, 由此减少了手机盲检测的次数, 从而提高了手机盲检测效 率并减少了手机因为盲检测而消耗的电量, 同时提高了子帧内物理资源的 利用效率。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到 本发明可以用硬件实现, 或固件实现, 或它们的组合方式来实现。 当使用 软件实现时, 可以将上述功能存储在计算机可读介质中或作为计算机可读 介质上的一个或多个指令或代码进行传输。 计算机可读介质包括计算机存 储介质和通信介质, 其中通信介质包括便于从一个地方向另一个地方传送 计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。 以此为例但不限于: 计算机可读介质可以包括 RAM ( Random Access
Memory, 随机存储器)、 ROM ( Read Only Memory, 只读内存)、 EEPROM ( Electrically Erasable Programmable Read Only Memory, 电可擦可编程只 读存储器) 、 CD-ROM ( Compact Disc Read Only Memory, 即只读光盘) 或其他光盘存储、 磁盘存储介质或者其他磁存储设备、 或者能够用于携带 或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的 任何其他介质。 此外。 任何连接可以适当的成为计算机可读介质。 例如, 如果软件是使用同轴电缆、光纤光缆、双绞线、 DSL( Digital Subscriber Line , 数字用户专线) 或者诸如红外线、 无线电和微波之类的无线技术从网站、 服务器或者其他远程源传输的, 那么同轴电缆、 光纤光缆、 双绞线、 DSL 或者诸如红外线、 无线和微波之类的无线技术包括在所属介质的定影中。 如本发明所使用的, 盘和碟包括 CD ( Compact Disc , 压缩光碟)、 激光碟、 光碟、 DVD碟 ( Digital Versatile Disc , 数字通用光) 、 软盘和蓝光光碟, 其中盘通常磁性的复制数据, 而碟则用激光来光学的复制数据。 上面的组 合也应当包括在计算机可读介质的保护范围之内。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局 限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可 轻易想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明 的保护范围应所述以权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种数据传输设备, 其特征在于, 包括:
接收单元, 用于接收调度控制信道长度信息, 所述调度控制信道长度 信息包括调度控制信道所占用的物理资源单元的数量, 所述调度控制信道 为向所述数据传输设备发送资源分配信息时的控制信道;
处理单元, 用于在预设搜索空间内按照所述接收单元接收的调度控制 信道长度信息进行盲检测, 当检测到所述调度控制信道长度信息对应的调 度控制信道后, 获取所述调度控制信道所承载的所述资源分配信息, 所述 预设搜索空间为用于承载所述资源分配信息的搜索空间。
2、 根据权利要求 1所述的设备, 其特征在于,
所述接收单元, 还用于接收预设搜索空间配置信息, 所述预设搜索空 间配置信息包括所述预设搜索空间的位置信息, 其中, 所述预设搜索空间 的位置信息用于指示所述预设搜索空间占用的时频资源。
3、 根据权利要求 2所述的设备, 其特征在于,
所述接收单元所接收的预设搜索空间配置信息还包括: 所述预设搜索 空间的类别信息, 所述预设搜索空间的类别信息用于指示所述预设搜索空 间的类别, 所述预设搜索空间的类别包括: 公共搜索空间、 专用搜索空间 或者群组专用搜索空间。
4、 根据权利要求 2所述的设备, 其特征在于,
当所述接收单元接收的所述预设搜索空间配置信息还包括预设搜索 空间的类别信息且所述预设搜索空间的类别信息指示所述预设搜索空间为 群组专用搜索空间时, 所述预设搜索空间配置信息还包括预设子帧的标识 信息,所述预设子帧的标识信息为用于指示承载所述调度控制信道的子帧; 所述处理单元, 还用于根据所述接收单元接收的预设子帧的标识信 息, 在所述预设子帧上的所述预设搜索空间内按照所述调度控制信道长度 信息进行盲检测。
5、 根据权利要求 1-4任一项权所述的设备, 其特征在于, 所述接收 单元接收的所述调度控制信道长度信息为以下一种:
所述调度控制信道所占用的信道控制单元 CCE数量; 所述调度控制信道所占用的子载波数量;
所述调度控制信道所占用的物理符号数量;
所述调度控制信道所对应的调度控制信道长度。
6、 根据权利要求 1-4任一项所述的设备, 其特征在于,
所述处理单元, 具体用于在所述预设搜索空间内, 按照所述调度控制 信道长度信息所指示的调度控制信道所占用的物理资源单元的数量, 将连 续的 k个所述物理资源单元作为一个调度控制信道, 根据预设解扰标识对 所述预设搜索空间内的调度控制信道所承载的资源分配信息进行解扰, 其 中, 所述预设解扰标识为对所述资源分配信息进行加扰处理所对应的解扰 标识, k为所述调度控制信道所占用的物理资源单元的数量, 如果所述预 设搜索空间内的第 i个调度控制信道所承载的资源分配信息正确解扰, 则 所述资源分配信息为向所述第一设备发送的资源分配信息, 所述第 i个调 度控制信道为所述调度控制信道, 其中, 所述 i为大于 0的整数。
7、 一种数据传输设备, 其特征在于, 包括:
处理单元, 用于获取调度控制信道长度信息, 所述调度控制信道长度 信息包括所述调度控制信道所占用的物理资源单元的数量, 所述调度控制 信道为向第一设备发送资源分配信息时的控制信道;
发送单元, 用于发送所述处理单元获取的调度控制信道长度信息; 所述处理单元, 用于根据所述获取的调度控制信道长度信息配置所述 调度控制信道的长度;
所述发送单元, 用于在所述处理单元完成对所述调度控制信道的长度 配置后, 向所述第一设备发送所述调度控制信道。
8、 根据权利要求 7所述的设备, 其特征在于,
所述发送单元, 还用于发送预设搜索空间配置信息, 所述预设搜索空 间配置信息包括所述预设搜索空间的位置信息, 其中, 所述预设搜索空间 的位置信息用于指示所述预设搜索空间占用的时频资源。
9、 根据权利要求 8所述的设备, 其特征在于,
所述发送单元发送的预设搜索空间配置信息还包括: 所述预设搜索空 间的类别信息, 所述预设搜索空间的类别信息用于指示所述预设搜索空间 的类别, 所述预设搜索空间的类别包括: 公共搜索空间、 专用搜索空间或 者群组专用搜索空间。
10、 根据权利要求 7-9任一项所述的设备, 其特征在于, 所述处理单 元获取的调度控制信道长度信息为以下一种:
所述调度控制信道所占用的信道控制单元 CCE数量;
所述调度控制信道所占用的子载波数量;
所述调度控制信道所占用的物理符号数量;
所述调度控制信道所对应的调度控制信道长度。
1 1、 一种数据传输方法, 其特征在于, 包括:
第一设备接收调度控制信道长度信息, 所述调度控制信道长度信息包 括所述调度控制信道所占用的物理资源单元的数量, 所述调度控制信道为 向所述第一设备发送资源分配信息时的控制信道;
所述第一设备在预设搜索空间内按照所述调度控制信道长度信息进 行盲检测;
所述第一设备检测到所述调度控制信道长度信息对应的调度控制信 道后, 获取所述调度控制信道所承载的所述资源分配信息, 所述预设搜索 空间为用于承载所述资源分配信, 的搜索空间。
12、 根据权利要求 1 1所述的方法, 其特征在于, 所述第一设备接收 调度控制信道长度信息之前, 所述方法还包括:
所述第一设备接收预设搜索空间配置信息, 所述预设搜索空间配置信 息包括所述预设搜索空间的位置信息, 其中, 所述预设搜索空间的位置信 息用于指示所述预设搜索空间占用的时频资源。
13、 根据权利要求 12所述的方法, 其特征在于,
所述预设搜索空间配置信息还包括: 所述预设搜索空间的类别信息, 所述预设搜索空间的类别信息用于指示所述预设搜索空间的类别, 所述预 设搜索空间的类别包括: 公共搜索空间、 专用搜索空间或者群组专用搜索 空间。
14、 根据权利要求 12所述的方法, 其特征在于,
当所述第一设备接收的所述预设搜索空间配置信息还包括预设搜索 空间的类别信息且所述预设搜索空间的类别信息指示所述预设搜索空间为 群组专用搜索空间时, 所述预设搜索空间配置信息还包括预设子帧的标识 信息,所述预设子帧的标识信息为用于指示承载所述调度控制信道的子帧; 所述第一设备在预设搜索空间内按照所述调度控制信道长度信息进 行盲检测, 包括:
所述第一设备根据所述预设子帧的标识信息, 在所述预设子帧上的所 述预设搜索空间内按照所述调度控制信道长度信息进行盲检测。
15、 根据权利要求 11-14任一项所述的方法, 其特征在于, 所述调度 控制信道长度信息为以下一种:
所述调度控制信道所占用的信道控制单元 CCE数量;
所述调度控制信道所占用的子载波数量;
所述调度控制信道所占用的物理符号数量;
所述调度控制信道所对应的调度控制信道长度。
16、 根据权利要求 11-14任一项权所述的方法, 其特征在于, 所述第 一设备在预设搜索空间内按照所述调度控制信道长度信息进行盲检测, 包 括:
所述第一设备在所述预设搜索空间内,按照所述调度控制信道长度信 息所指示的调度控制信道所占用的物理资源单元的数量, 将连续的 k个所 述物理资源单元作为一个调度控制信道, 根据预设解扰标识对所述预设搜 索空间内的调度控制信道所承载的资源分配信息进行解扰, 其中, 所述预 设解扰标识为对所述资源分配信息进行加扰处理所对应的解扰标识, k为 所述调度控制信道所占用的物理资源单元的数量;
如果所述第一设备对所述预设搜索空间内的第 i个调度控制信道所承 载的资源分配信息正确解扰, 则所述资源分配信息为向所述第一设备发送 的资源分配信息, 所述第 i个调度控制信道为所述调度控制信道, 其中, 所述 i为大于 0的整数。
17、 一种数据传输方法, 其特征在于, 包括:
第二设备发送调度控制信道长度信息, 所述调度控制信道长度信息包 括所述调度控制信道所占用的物理资源单元的数量, 所述调度控制信道为 向第一设备发送资源分配信息时的控制信道;
所述第二设备根据所述调度控制信道长度信息向所述第一设备发送 所述调度控制信道。
18、 根据权利要求 17所述的方法, 其特征在于, 所述第二设备发送 调度控制信道长度信息之前, 所述方法还包括:
所述第二设备发送预设搜索空间配置信息, 所述预设搜索空间配置信 息包括所述预设搜索空间的位置信息, 其中, 所述预设搜索空间的位置信 息用于指示所述预设搜索空间占用的时频资源。
19、 根据权利要求 18所述的方法, 其特征在于,
所述预设搜索空间配置信息还包括: 所述预设搜索空间的类别信息, 所述预设搜索空间的类别信息用于指示所述预设搜索空间的类别, 所述预 设搜索空间的类别包括: 公共搜索空间、 专用搜索空间或者群组专用搜索 空间。
20、 根据权利要求 17- 19任一项所述的方法, 其特征在于, 所述调度 控制信道长度信息为以下一种:
所述调度控制信道所占用的信道控制单元 CCE数量;
所述调度控制信道所占用的子载波数量;
所述调度控制信道所占用的物理符号数量;
所述调度控制信道所对应的调度控制信道长度。
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