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 PDFInfo
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- 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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- control channel
- search space
- scheduling control
- information
- preset
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0038—Blind format detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0046—Code rate detection or code type detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0072—Error control for data other than payload data, e.g. control data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing 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
Description
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US11659568B2 (en) | 2016-12-19 | 2023-05-23 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for transmitting information, network device and terminal device |
CN110431891A (zh) * | 2017-03-24 | 2019-11-08 | 瑞典爱立信有限公司 | 减少mtc装置的功耗的信令指示 |
JP2020511884A (ja) * | 2017-03-24 | 2020-04-16 | テレフオンアクチーボラゲット エルエム エリクソン(パブル) | Mtc機器の電力消費を抑えるシグナリング指標 |
US11553423B2 (en) | 2017-03-24 | 2023-01-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Signaling indication to reduce power consumption for MTC devices |
CN108667491A (zh) * | 2017-03-30 | 2018-10-16 | 维沃移动通信有限公司 | Pmi信息的发送方法、接收方法、相关设备及系统 |
CN108667491B (zh) * | 2017-03-30 | 2020-06-26 | 维沃移动通信有限公司 | Pmi信息的发送方法、接收方法、相关设备及系统 |
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CN105393576B (zh) | 2020-05-15 |
EP3148242A4 (en) | 2017-04-19 |
CN105393576A (zh) | 2016-03-09 |
US20170099674A1 (en) | 2017-04-06 |
BR112016030001A2 (pt) | 2018-05-15 |
EP3148242A1 (en) | 2017-03-29 |
JP2017525237A (ja) | 2017-08-31 |
US10306659B2 (en) | 2019-05-28 |
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