WO2013113261A1 - Procédé de communication, station de base et équipement d'utilisateur - Google Patents

Procédé de communication, station de base et équipement d'utilisateur Download PDF

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Publication number
WO2013113261A1
WO2013113261A1 PCT/CN2013/070745 CN2013070745W WO2013113261A1 WO 2013113261 A1 WO2013113261 A1 WO 2013113261A1 CN 2013070745 W CN2013070745 W CN 2013070745W WO 2013113261 A1 WO2013113261 A1 WO 2013113261A1
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WIPO (PCT)
Prior art keywords
information
downlink
capability
user equipment
downlink subframe
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Application number
PCT/CN2013/070745
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English (en)
Chinese (zh)
Inventor
夏金环
吕永霞
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华为技术有限公司
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Publication of WO2013113261A1 publication Critical patent/WO2013113261A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • Embodiments of the present invention relate to the field of wireless communications, and more particularly, to a communication method, a base station, and a user equipment. Background technique
  • a Half Duplex Frequency Division Duplex (HD-FDD type User Equipment (UE) is generally used.
  • the uplink data of different UEs is configured to reach the evolved base station at the same time, and the UE needs to determine how much time to send the uplink data according to the distance from the base station, as shown in FIG. 1.
  • the UE1 shown in FIG. 1 is closer to the base station.
  • the distance between the UE2 and the base station is far away.
  • the time TA1 when the UE1 sends the uplink subframe in advance is smaller than the time TA2 when the UE2 sends the uplink subframe in advance, so that the uplink subframe sent by the UE1 and the UE2 can reach the base station at the same time.
  • the UE needs to send an uplink subframe in the K + 1 subframe, and the downlink subframe needs to be received in the Kth subframe, the UE needs to send the uplink subframe in advance TA time, and the UE is working at the receiver in the Kth subframe.
  • the transmitter In the K + 1 subframe, the transmitter is working, and the work from the receiver to the transmitter requires a conversion time Tp, then In order to ensure that the UE can send the complete uplink subframe, the UE can not receive the last downlink data in the TA + Tp time of the K downlink subframes, a downlink data receiver resulting in reduced accuracy.
  • the embodiment of the present invention provides a communication method, which is capable of determining the number of OFDM symbols that are ignored in the data domain tail of the downlink subframe received by the UE, and does not carry the downlink data sent by the eNB on the ignored OFDM symbols, thereby improving the UE. Detect the accuracy of the data in the downlink subframe.
  • a communication method is provided, the method comprising:
  • N ⁇ of the user equipment UE Acquiring the number of ignored Orthogonal Frequency Division Multiplexing OFDM symbols N ⁇ of the user equipment UE, where the N m is used to indicate the N ⁇ of the tail of the data field of the downlink subframe sent by the base station eNB to the UE No data is carried on the OFDM symbol;
  • a communication method comprising:
  • the request message carries an absolute time-aligned TA value of the user equipment UE, or the number of orthogonal frequency division multiplexing OFDM symbols N ⁇ that is ignored at the tail of the downlink subframe transmitted to the UE, so that the eNB according to the UE determines that the absolute value of TA or N ⁇ acquiring the N ⁇ , wherein said N ⁇ indicating the end of the data field of the downlink sub-frame transmitted by the eNB to the UE N ⁇ OFDM symbols do not carry data;
  • a base station including:
  • an acquiring unit configured to acquire a number of ignored orthogonal frequency division multiplexing OFDM symbols N ⁇ of the user equipment UE, where the N ⁇ is used to indicate a tail of a data domain of a downlink subframe that is sent by the base station eNB to the UE
  • the N ⁇ OFDM symbols do not carry data
  • a sending unit configured to send, according to the N ⁇ , a downlink subframe to the UE.
  • a user equipment where the user equipment includes:
  • a sending unit configured to send a request message to the base station eNB, where the request message carries an absolute TA value of the user equipment, or the number of orthogonal frequency division multiplexing OFDM symbols that are ignored at the tail of the downlink subframe sent to the user equipment N ⁇ , so that the eNB determines that the acquisition of the N ⁇ or N ⁇ the absolute value TA of the user equipment, wherein the data representing N ⁇ downlink subframes transmitted by the eNB to the user equipment The N ⁇ OFDM symbols at the tail of the domain do not carry data;
  • a receiving unit configured to receive a downlink subframe sent by the eNB, and acquire downlink data from the downlink subframe according to the N ⁇ .
  • the embodiment of the present invention provides a communication method, so that the base station can learn the capability configuration of the user equipment, and accordingly configure the uplink scheduling and/or downlink scheduling resources for the user equipment, which can effectively improve resource utilization. .
  • a communication method includes:
  • Capability indication information of the UE
  • the uplink scheduling grant and/or downlink scheduling message includes modulation and coding scheme MCS information and physical resource block PRB information, the MCS information and/or the PRB
  • MCS information and/or the PRB
  • the information is determined according to the capability indication information of the UE.
  • a communication method comprising:
  • an uplink scheduling grant and/or a downlink scheduling message receives, by the eNB, an uplink scheduling grant and/or a downlink scheduling message, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, where the MCS information and/or the PRB information is according to the UE
  • the capability indication information is determined.
  • a base station including:
  • a receiving unit configured to receive a capability configuration message sent by the user equipment UE, where the capability configuration message includes capability indication information of the UE;
  • a sending unit configured to send an uplink scheduling grant and/or a downlink scheduling message to the UE, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, the MCS information, and/or the PRB information Determined according to the capability indication information of the UE.
  • a user equipment where the user equipment includes:
  • a sending unit configured to send a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the user equipment;
  • a receiving unit configured to receive an uplink scheduling grant and/or a downlink scheduling message sent by the eNB, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, where the MCS information and/or the PRB information is according to The capability indication information of the UE is determined.
  • the UE reports the capability information of the UE to the eNB, so that the eNB can configure the uplink scheduling and/or the downlink scheduling message according to the specific situation of the UE, for example, the capacity of the transport block is limited.
  • the amount which saves the UE's cache, saves the UE cost.
  • FIG. 1 is a schematic diagram of a user equipment transmitting an uplink subframe in advance
  • FIG. 2 is a schematic flow chart of a method in accordance with an embodiment of the present invention.
  • FIG. 3 is a schematic flow chart of a specific scheme of a method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flow diagram of a method in accordance with another aspect of an embodiment of the present invention.
  • Figure 5 is a schematic flow diagram of a method in accordance with an embodiment of the present invention.
  • FIG. 6 is a schematic flow chart of a specific scheme of a method according to an embodiment of the present invention.
  • FIG. 7 is a schematic flow chart of a specific scheme of a method according to an embodiment of the present invention.
  • FIG. 8 is a schematic flow diagram of a method in accordance with another aspect of an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a base station according to another aspect of an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a user equipment according to another aspect of an embodiment of the present invention. detailed description
  • a user equipment which may also be called a mobile terminal, a mobile user equipment, or the like, may be accessed via a radio access network (eg, RAN, Radio Access Network).
  • a radio access network eg, RAN, Radio Access Network
  • the user equipment can be a mobile terminal, such as a mobile telephone (or "cellular" telephone) and a computer with a mobile terminal, For example, it may be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with a wireless access network.
  • the communication method 200 includes the steps of:
  • the eNB acquires the ignored orthogonal frequency division multiplexing of the UE (Orthogonal Frequency
  • the number of the multiplexes of the OFDM symbol is N ⁇ , where the N ⁇ is used to indicate that the N ⁇ OFDM symbols at the tail of the data field of the downlink subframe that the eNB sends to the UE do not carry data;
  • the eNB sends a downlink subframe to the UE according to the N ⁇ .
  • step 210 the N ⁇ can be determined by the UE's Time Alignment (TA) value.
  • step 210 of method 200 specifically includes:
  • the eNB acquires an absolute time alignment TA value of the UE.
  • the eNB determines, according to the TA value of the UE, the N ⁇ of the UE by using a predefined rule.
  • Determining the N ⁇ of the UE by a predefined rule may be determined with reference to Table 1.
  • step 210 may specifically include:
  • the eNB receives the request message sent by the UE, where the request message carries the N ⁇ .
  • the request message is a media access control (Media Access Control, abbreviated MAC) message, a MAC message carrying the control unit (Control Element, referred to as CE), the CE to carry the N ⁇ Information.
  • the N ⁇ is represented by a decimal number corresponding to the bit sequence of the CE in the MAC message, for example, by a 3-bit sequence, for example, 010 indicates that the number of ignored OFDM symbols N ⁇ is 2.
  • the request message may be a channel that is sent by the UE on a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Sharing Channel (PUSCH).
  • quality information channel quality information, referred to as CQI
  • channel state information channel state information, CSI for short
  • N ⁇ may be different, thus allowing negligible number of different ODFM symbols
  • the N ⁇ UE multiplexes the data domain portion of the same downlink subframe to further effectively utilize the spectrum resources.
  • the number of ignored OFDM symbols for UE1 obtained according to the TA value of the first UE is m m , which is obtained according to the TA value of the second UE (hereinafter referred to as UE2) ignored UE2 number of OFDM symbols used to N2 m, and for example N ⁇ m> N2 m.
  • the OFDM symbol of the data field of the downlink subframe may be divided into two parts according to the M ⁇ and the N2 , where the first part is from the downlink The starting position of the data field of the frame is counted, and the number of OFDM symbols of the first part is N. - M ⁇ , the second part is calculated from the end position of the first part, and the number of OFDM symbols of the second part is N ⁇ m _ N2 m .
  • the first part can be used by the eNB to send downlink data to the UE1, and the second part can be used by the eNB to send downlink data to the UE2.
  • the eNB may send a downlink scheduling message to the UE, for example, send Downlink Control Information (DCI), and include, in the DCI, a 1-bit indication field, for indicating that the UE is in the downlink subframe. Which part of the data field receives the downlink data. For example, 0 is used to indicate that downlink data is received in the first portion, and 1 is used to indicate that downlink data is received in the second portion. Therefore, the eNB may send a DCI to the UE1, where the indication field in the DCI is 0, indicating that the UE1 receives downlink data in the first part of the data field of the downlink subframe. Similarly, the eNB may send a DCI to the UE2, where the indication field in the DCI is 1, indicating that the UE2 receives the downlink data in the second part of the data field of the downlink subframe.
  • DCI Downlink Control Information
  • the eNB may indicate, by using high layer signaling, for example, dedicated Radio Resource Control (RRC) signaling, that different UEs receive extended portions in different parts of the data domain of the downlink subframe.
  • PDCCH dedicated Radio Resource Control
  • the eNB sends RRC signaling to the UE1, where the RRC signaling includes a 1-bit indication field, and the value of the indication field is 0, indicating that the UE1 is in the downlink.
  • the first portion of the data field of the subframe receives the extended PDCCH.
  • RRC Radio Resource Control
  • the eNB sends RRC signaling to the UE2, where the value of the indication field in the RRC signaling is 1, indicating that the UE2 receives the extended PDCCH in the second part of the data domain of the downlink subframe.
  • the extended PDCCH and the downlink data occupy the same OFDM symbol in the time domain.
  • the eNB may also use high-layer signaling, such as dedicated RRC signaling, to indicate that different UEs receive UE-specific downlink demodulation reference signals in different parts of the data domain of the downlink subframe (Downlink Demodulation).
  • the reference signal (referred to as DMRS) uses a fixed pattern.
  • the UE receives the DMRS according to the format, and performs channel estimation to assist in demodulating the downlink data. For example, the eNB sends RRC signaling to the UE1, where the RRC signaling includes a 1-bit indication field, and the value of the indication field is 0, indicating that the UE1 receives the UE1-specific DMRS in the first part of the data field of the downlink subframe.
  • the eNB sends RRC signaling to the UE2, where the value of the indication field in the RRC signaling is 1, indicating that the UE2 receives the UE2 specific DMRS in the second part of the data field of the downlink subframe.
  • the distribution of the DMRS in different parts of the data field of the downlink subframe can still be configured by using the usual resource mapping manner.
  • the UE performs uplink grant scheduling according to the eNB (UL).
  • UL uplink grant scheduling
  • the size of the Transport Block is determined by the size of the Modulation Coding Scheme (MCS) and the Physical Resource Block (PRB), and the transport block TB is It is useful information that the UE needs to transmit within a scheduling interval.
  • MCS Modulation Coding Scheme
  • PRB Physical Resource Block
  • the eNB also transmits according to this rule, and the UE needs to perform inverse processing on each step implemented by the eNB, where the received data needs to be segment-decoded. That is to say, the UE needs a large amount of buffer to support the segmentation and decoding code. If the scheduling data does not exceed 6144 bits per time, the UE does not need segment coding and decoding, which saves the UE's cache.
  • the eNB may receive the capability configuration message sent by the UE1, where the capability configuration message includes capability indication information of the UE1, and the capability indication information includes whether the UE belongs to a low capability UE, such as a low cost.
  • Low-cost Machine Type Communication (Low-cost MTC) type UE and/or whether UE1 supports code block segmentation, and/or whether UE1 supports high-order modulation mode, that is, 16/64 positive Width modulation (Quadrature) Amplitude Modulation, referred to as QAM).
  • the eNB sends a downlink scheduling message, such as a DCI, to the UE1, where the DCI includes MCS information and PRB information, and the MCS information and/or the PRB information is determined according to the capability indication information of the first UE.
  • a downlink scheduling message such as a DCI
  • the DCI includes MCS information and PRB information
  • the MCS information and/or the PRB information is determined according to the capability indication information of the first UE.
  • QPSK Quadrature Phase Shift Keying
  • the MCS can vacate 1 bit as a resource mapping indication field, which indicates which part of the OFDM symbol in the data domain of the downlink subframe is used by different UEs in resource mapping of the downlink subframe. For example, when the 1 bit is 0, it indicates that UE1 performs resource mapping using the ODFM symbol of the first part of the data field of the downlink subframe.
  • the eNB may receive the capability configuration message sent by the UE2, where the capability configuration message includes capability indication information of the UE2, the capability indication information includes whether the UE belongs to a low capability UE, and/or whether the UE2 supports The code block segmentation, and/or whether UE2 supports high-order modulation.
  • the eNB sends a downlink scheduling message, such as a DCI, to the UE2, where the DCI includes MCS information and PRB information, and the MCS information and/or the PRB information is determined according to the capability indication information of the UE2. For example, when UE2 only supports QPSK, the resource mapping indication field of the MCS is 1, indicating that UE2 performs resource mapping by using the OFDM symbol of the second part of the data field of the downlink subframe.
  • the eNB acquires capability information of the UE, and for this aspect of the UE embodiment, as shown in FIG. 4, a communication method 400 is proposed, where the method includes:
  • the eNB receives a capability configuration message sent by the UE, where the capability configuration message includes capability indication information of the UE.
  • the eNB sends an uplink scheduling grant and/or a downlink scheduling message to the UE, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, where the MCS information and/or the PRB information is The capability indication information of the UE is determined.
  • the capability indication information described herein includes whether the UE belongs to a low capability type UE, and/or whether the UE supports code block segmentation, and/or whether the UE supports high order modulation.
  • the eNB determines an MSC and/or a PRB for uplink scheduling grant and/or downlink scheduling according to the capability indication information of the UE.
  • the implementation process of the method of the embodiment of the present invention is described above from the perspective of the eNB.
  • the implementation process of the method of the embodiment of the present invention is further explained from the perspective of the UE.
  • FIG. 5 is a schematic flow diagram of a communication method 500 in accordance with an embodiment of the present invention. As shown, the method 500 includes:
  • the UE sends a request message to the base station eNB, where the request message carries information indicating the number of ignored orthogonal frequency division multiplexing OFDM symbols N ⁇ of the user equipment UE, where the N ⁇ is used to indicate the base station eNB.
  • the N ⁇ OFDM symbols at the tail of the data field of the downlink subframe transmitted to the UE do not carry data;
  • the UE receives the downlink subframe sent by the eNB, and acquires downlink data from the downlink subframe according to the N ⁇ .
  • the information indicating the ignored OFDM symbol number N m of the UE is an absolute time alignment TA value of the UE, and the absolute TA value of the UE is used by the eNB to determine The N ⁇ .
  • the means for indicating the UE neglected orthogonal frequency division multiplexing OFDM symbol number information N ⁇ is the value of N ⁇ .
  • the request message is a media access control (MAC) message
  • the message carries the MAC control unit CE, the information of the N ⁇ CE on the carrier.
  • the message is a request or a channel state information CQI (Channel State Information, referred to as CSI) is sent on the PUCCH or the PUSCH in, or wherein the CQI information is carried on the N ⁇ CSI.
  • CQI Channel State Information
  • the number of OFDM symbols included in the data field of the downlink subframe is N.
  • the number of OFDM symbols that can be used to receive the valid part of the downlink data in the data field of the downlink subframe is N 0 -N m .
  • the method further includes:
  • the UE receives a downlink scheduling message sent by the eNB, where the downlink scheduling message indicates that the UE receives downlink data in the valid part of the downlink subframe.
  • the method may also include:
  • the UE receives the first downlink control information DCI sent by the eNB, where the first DCI includes first indication information, where the first indication information is used to indicate that the UE is in the downlink subframe.
  • the valid portion of the data field receives the extended PDCCH channel and/or a particular reference signal for the UE.
  • the UE may report its own capability to the eNB, so that the eNB according to the UE
  • the MCS and the PRB information are configured to be different, and are sent to the UE by using a downlink scheduling message. Therefore, the method 500 may further include the following steps:
  • the UE sends a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the UE, in which case the downlink scheduling message includes MCS information and PRB information, and the MCS information and/or the The PRB information is determined according to the capability indication information of the UE.
  • the capability information of the UE includes whether the UE is a low capability UE, and/or whether the UE supports code block segmentation, and/or whether the UE supports high order modulation.
  • the MCS information in the downlink scheduling message includes a resource mapping indication field, where the resource mapping indication field is used to instruct the UE to perform resource mapping by using the valid part of the downlink subframe.
  • the eNB acquires the capability information of the UE, and according to this aspect of the embodiment of the present invention, as shown in FIG. 8, a communication method 800 is proposed, where the method includes:
  • the UE sends a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the UE.
  • the 820 Receive an uplink scheduling grant and/or a downlink scheduling message sent by the eNB, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, where the MCS information and/or the PRB information is The capability indication information of the UE is determined.
  • the capability indication information described herein includes whether the UE belongs to a low capability type UE, and/or whether the UE supports code block segmentation, and/or whether the UE supports high order modulation.
  • the eNB determines the MSC and/or PRB for uplink scheduling grant and/or downlink scheduling based on the capability indication information of the UE.
  • the number of OFDM symbols that are ignored when the UE receives the downlink subframe is clarified, and the HD-FDD user equipment removes the downlink subframe and the uplink subframe,
  • the possibility of data leakage detection in the downlink subframe partially improves the accuracy of detecting downlink subframes by the HD-FDD user equipment.
  • UEs with different TA values can multiplex the data fields of the same inferior subframe to receive downlink data, and improve downlink subframes. Resource utilization.
  • the UE reports its own capability information to the eNB, so that the eNB can configure an uplink scheduling and/or a downlink scheduling message according to the specific situation of the UE, for example, defining a transport block. Capacity, which saves the UE's cache and saves UE costs.
  • FIG. 9 is a schematic structural diagram of a base station 900 according to an embodiment of the present invention.
  • the base station 900 includes: an obtaining unit 910, configured to acquire a number of ignored orthogonal frequency division multiplexing OFDM symbols N ⁇ of the user equipment UE, where the N ⁇ is used to indicate that the base station eNB is to the UE The N ⁇ OFDM symbols at the tail of the data field of the transmitted downlink subframe do not carry data;
  • the sending unit 920 is configured to send, according to the N ⁇ , a downlink subframe to the UE.
  • the acquiring unit 910 is specifically configured to acquire an absolute time alignment TA value of the UE, and determine, according to the TA value of the UE, the N ⁇ of the UE by using a predefined rule. .
  • the acquiring unit 910 is specifically configured to receive a request message sent by the UE, where the request message carries the N ⁇ .
  • the request message is a media access control (MAC) message
  • the message carries the MAC control unit CE, the information of the N ⁇ CE on the carrier.
  • MAC media access control
  • the request message is that the UE is in an uplink physical control channel.
  • PUCCH transmitted on physical uplink shared channel PUSCH channel quality information CQI or CSI channel state information, wherein the information carrier the CQI or CSI on the N ⁇ .
  • the UE specifically includes a first UE and a second UE, where the N ⁇ specifically includes M ⁇ for the first UE, and N2 ⁇ for the second UE, and Said M ⁇ is greater than said N2 ⁇ ,
  • the data field of the downlink subframe includes the number of OFDM symbols being N.
  • the OFDM symbol of the data field of the downlink subframe is divided into two parts according to the M ⁇ and the N2 , wherein the first part is calculated from a start position of a data domain of the downlink subframe, and the first part is OFDM.
  • the number of symbols is N 0 - N ⁇ m
  • the second part is calculated from the end position of the first part
  • the number of OFDM symbols of the second part is N ⁇ m - N2 m ,
  • the sending unit 920 is specifically configured to send a downlink scheduling message to the first UE, where the downlink scheduling message indicates that the first UE receives downlink data in the first part of the downlink subframe.
  • the sending unit 920 is specifically configured to send a downlink scheduling message to the second UE, where the downlink scheduling message indicates that the second UE is in the downlink subframe The second part receives the downlink data.
  • the sending unit 920 is specifically configured to send the first downlink control information DCI to the first UE in the PDCCH, where the first DCI includes first indication information, and the first indication information is used by the first indication information.
  • the first UE is instructed to receive an extended PDCCH channel and/or a reference signal specific to the first UE in the first part of a data domain of the downlink subframe.
  • the PDCCH sends the second downlink control information DCI to the second UE, where the second DCI includes second indication information, where the second indication information is used to indicate that the second UE is in the
  • the second portion of the data field of the downlink subframe receives the extended PDCCH channel and/or a reference signal specific to the second UE.
  • the acquiring unit 910 is further configured to receive a capability configuration message sent by the first UE, where the capability configuration message includes capability indication information of the first UE, and the downlink scheduling message includes modulation
  • the coding scheme MCS information and the physical resource block PRB information, the MCS information and/or the PRB information are determined according to the capability indication information of the first UE.
  • the capability information of the first UE includes whether the first UE is a low-capability type UE, and/or whether the first UE is a supported code block segment, and/or the Whether the first UE supports high order modulation.
  • the MCS information in the downlink scheduling message includes a resource mapping indication field, where the resource mapping indication field is used to indicate that the first UE uses the first part of the downlink subframe to perform resources. Mapping.
  • the acquiring unit 910 is further configured to receive a capability configuration message sent by the second UE, where the capability configuration message includes capability indication information of the second UE, and the downlink scheduling message includes modulation
  • the coding scheme MCS information and the physical resource block PRB information, the MCS information and/or the PRB information are determined according to the capability indication information of the second UE.
  • the capability indication information of the second UE includes at least one of the following: whether the second UE is a low-capability UE, and whether the second UE is a supported code block. a segment, and whether the second UE supports high order modulation.
  • the MCS information in the downlink scheduling message includes a resource mapping indication field, where the resource mapping indication field is used to indicate that the second UE performs the second part of the downlink subframe. Resource mapping.
  • FIG. 10 is a schematic structural diagram of another base station 1000 according to an embodiment of the present invention. As shown in FIG. 9, the base station 1000 includes:
  • the receiving unit 1010 is configured to receive a capability configuration message sent by the UE, where the capability configuration message includes capability indication information of the UE;
  • the sending unit 1020 is configured to send an uplink scheduling grant and/or a downlink scheduling message to the UE, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, the MCS information, and/or the PRB
  • the information is determined according to the capability indication information of the UE.
  • the capability indication information of the UE includes at least one of the following: whether the UE is a low-capability UE, whether the UE supports code block segmentation, and whether the UE is Support for high-order modulation.
  • FIG. 11 is a schematic structural diagram of a user equipment 1100 according to an embodiment of the present invention.
  • the user device 1100 includes:
  • the sending unit 1110 is configured to send a request message to the base station eNB, where the request message carries the absolute TA value of the user equipment 1100, or the orthogonal frequency division multiplexing of the tail of the downlink subframe sent to the user equipment 1100 is ignored.
  • the number of OFDM symbols is N ⁇ such that the eNB determines the N ⁇ or acquires the N ⁇ according to the TA value of the user equipment 1100, where the N ⁇ indicates the downlink sent by the eNB to the user equipment 1100.
  • the N ⁇ OFDM symbols at the end of the data field of the subframe do not carry data;
  • the receiving unit 1120 is configured to receive a downlink subframe sent by the eNB, and acquire downlink data from the downlink subframe according to the N ⁇ .
  • the request message is channel quality information CQI or channel state information CSI transmitted on an uplink physical control channel PUCCH or an uplink physical shared channel PUSCH, where the CQI or CSI carries the N ⁇ information.
  • the data field of the downlink subframe includes an OFDM symbol number of N.
  • the number of OFDM symbols that can be used to receive the effective part of the downlink data in the data field of the downlink subframe is N 0 -N m
  • the receiving unit 1120 is specifically configured to receive a downlink scheduling message sent by the eNB, where The downlink scheduling message indicates that the UE receives downlink data in the valid part of the downlink subframe.
  • the receiving unit 1120 is specifically configured to receive, by using the PDCCH, the first downlink control information DCI sent by the eNB, where the first DCI includes first indication information, where the first indication information is used. Instructing the UE to receive an extended PDCCH channel and/or a reference signal specific to the UE in the active portion of the data domain of the downlink subframe.
  • the sending unit 1110 is specifically configured to send a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the UE, and the downlink scheduling message includes a modulation and coding scheme MCS information.
  • Physical resource block PRB information, the MCS information and/or the PRB information is determined according to the capability indication information of the UE.
  • the capability indication information of the UE includes at least one of the following: whether the UE is a low-capability UE, whether the UE supports code block segmentation, and whether the UE is Support for high-order modulation.
  • the MCS information in the downlink scheduling message includes a resource mapping indication field, where the resource mapping indication field is used to instruct the UE to perform resource mapping by using the valid part of the downlink subframe.
  • FIG. 12 is a schematic structural diagram of another user equipment 1200 according to an embodiment of the present invention. As shown in FIG. 12, the user equipment 1200 includes:
  • the sending unit 1210 is configured to send a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the user equipment 1200.
  • the receiving unit 1220 is configured to receive an uplink scheduling grant and/or a downlink scheduling message sent by the eNB, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, and the MCS information and/or the PRB information. Determined according to the capability indication information of the UE.
  • the capability indication information of the user equipment 1200 includes at least one of the following: whether the user equipment is a low-capability UE, whether the UE supports code block segmentation, and Whether the UE supports high-order modulation.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the components displayed for the unit may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

Abstract

La présente invention concerne un procédé de communication. Le procédé comprend les étapes consistant à : obtenir le nombre Nm de symboles de multiplexage par répartition orthogonale de la fréquence (OFDM) négligés d'un équipement d'utilisateur (UE), Nm étant utilisé pour indiquer que les données ne sont pas portées sur les Nm symboles OFDM au niveau de la queue d'un domaine des données d'une sous-trame de liaison descendante envoyé par une station de base (eNB) à l'UE ; et à envoyer la sous-trame de liaison descendante à l'UE conformément à Nm. Conformément aux modes de réalisation de la présente invention, la possibilité que certaines données d'une sous-trame de liaison descendante ne soient pas détectées en raison du fait qu'elles sont envoyées à l'avance dans le procédé de commutation où l'équipement d'utilisateur HD-FDD reçoit la sous-trame de liaison descendante et envoie une sous-trame de liaison montante est éliminée en déterminant le nombre de symboles OFDM négligés lorsque l'UE reçoit la sous-trame de liaison descendante, et l'exactitude de la détection par l'équipement d'utilisateur HD-FDD de la sous-trame de liaison descendante est augmentée.
PCT/CN2013/070745 2012-02-01 2013-01-21 Procédé de communication, station de base et équipement d'utilisateur WO2013113261A1 (fr)

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US10728924B2 (en) 2013-12-04 2020-07-28 Telefonaktiebolaget Lm Ericsson (Publ) Uplink subframe shortening in time-division duplex (TDD) systems
US10084562B2 (en) * 2016-08-22 2018-09-25 Huawei Technologies Co., Ltd. System and method for filtered OFDM
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CN108322287B (zh) * 2017-01-18 2021-04-30 上海诺基亚贝尔股份有限公司 一种重调时pusch数据传输的方法和装置
WO2020019322A1 (fr) * 2018-07-27 2020-01-30 华为技术有限公司 Procédé et appareil de transmission d'informations
CN109155727B (zh) * 2018-08-07 2022-05-13 北京小米移动软件有限公司 传输块调度间隔的配置、确定方法及装置和基站
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