WO2013107364A1 - Procédé et appareil d'envoi d'informations de commande de liaison descendante, procédé et appareil détection de canal de commande de liaison descendante - Google Patents

Procédé et appareil d'envoi d'informations de commande de liaison descendante, procédé et appareil détection de canal de commande de liaison descendante Download PDF

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Publication number
WO2013107364A1
WO2013107364A1 PCT/CN2013/070607 CN2013070607W WO2013107364A1 WO 2013107364 A1 WO2013107364 A1 WO 2013107364A1 CN 2013070607 W CN2013070607 W CN 2013070607W WO 2013107364 A1 WO2013107364 A1 WO 2013107364A1
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Prior art keywords
downlink control
control information
information
physical
channel
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PCT/CN2013/070607
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English (en)
Chinese (zh)
Inventor
戴博
石靖
李新彩
毕峰
夏树强
方惠英
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中兴通讯股份有限公司
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Publication of WO2013107364A1 publication Critical patent/WO2013107364A1/fr

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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
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for detecting downlink control information and detecting a downlink control channel.
  • MTC Machine Type Communication
  • MTC User Equipment MTC User Equipment
  • M2M user communication equipment is the main application form of the Internet of Things at this stage. Low power consumption and low cost are important guarantees for large-scale applications.
  • M2M technology has been supported by internationally renowned manufacturers such as NEC, HP, CA, Intel, IBM, AT&T, and mobile operators in various countries.
  • the M2M devices currently deployed on the market are mainly based on the Global System of Mobile communication (GSM) system.
  • GSM Global System of Mobile communication
  • the maximum supported transmission and reception bandwidth of the MTC UE is smaller than that of the conventional legacy YE terminal (Ordinary Legacy R8/9/10 UE, OL UE for short), which requires a maximum transmission and reception bandwidth of 20 MHz.
  • the receive and transmit bandwidth of the MTC UE can be set to a small bandwidth supported by U'E systems such as 1.4MHz or 3MHz or 5MHz.
  • the radio frame (RF frame) in the LTE system includes a frequency division duplex (FDD) mode and a time division duplex (TDD) mode.
  • FDD frequency division duplex
  • TDD time division duplex
  • 1 is a schematic diagram of a frame structure of an FDD mode in the LTE technology of the related art.
  • a 10 millisecond (ms) radio frame consists of twenty slots of length 0.5 ms and numbers 0 to 9. Composition, time slot 2i and frame 2 +1 constitute a subframe i with a length of 1 ms.
  • FIG. 2 is a schematic diagram of a frame structure of a TDD mode in a UTE technology of the related art, as shown in FIG. 2.
  • a 10ms radio frame consists of two half frames of 5ms length.
  • One field consists of 5 subframes with a length of 1ms.
  • the subframe i is defined as two slots 2i and 2i+ with a length of 0.5ms. l.
  • a standard cyclic prefix Noraial Cyclic Prefix, simply CP
  • one slot contains seven symbols with a length of 66,7 microseconds (us), where the CP of the first symbol The length of the CP is 5.21us, and the length of the remaining 6 symbols is 4,69us.
  • the Extended Cyclic Prefix Extended Cyclic Prefix
  • one slot contains 6 symbols, and the CP length of all symbols is 16.67us. .
  • PCFKi-! Physical Control Format Indicator Channel
  • Physical Hybrid Automatic Retransmission Request Indicator Channel referred to as Physical Hybrid Automatic Retransmission Request Indicator Channel
  • It is a PHICH Physical Hybrid Automatic Retransmission Request Indicator Channel
  • PDCCH Physical Downlink Control Channel
  • the time-frequency structure of each physical channel of the downlink subframe is as shown in FIG. 3.
  • the PCFICH is located in the first symbol of the subframe, and is used to indicate that the PDCCH control signaling occupies the number of symbols in one subframe.
  • CFI can take 1, 2 or 3.
  • the PHICH is located in the first symbol or the first symbol of the subframe, and is used to carry ACK/NAC feedback information for the uplink PUSCH.
  • the PDCCH is used to carry Downlink Control Information (DCI), and includes: uplink and downlink scheduling information, and uplink power control information.
  • DCI Downlink Control Information
  • the format of DO: (DCI fommt) is divided into the following types: DCI format 0, DCi format 1, DCi format IA, DCI format IB, DCI format 1C, DCI format 1 D, DCI format 2, DCI format 2 A, DCI format 3 and DCI format 3 A; etc.;
  • DCI format 0 is used to indicate scheduling of a Physical Uplink Shared Channel (PUSCH);
  • DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format ID are used in different modes of PDSCH codeword scheduling;
  • DCI format 2A, DCI format 2B are used for different modes of space division multiplexing
  • the DCI format 3 and the DCI format 3A are used for different modes of the physical uplink control channel (Physical Uplink Control Channel, abbreviated as PUCCH) and the power control command of the PUSCH.
  • PUCCH Physical Uplink Control Channel
  • the cost of the physical downlink control channel is relatively large.
  • the present invention provides a method for transmitting physical line control information and a method and device for detecting a physical downlink channel, where one downlink control information of the UE corresponds to one physical downlink control channel, which causes a large overhead of the physical downlink control channel.
  • a method for transmitting downlink control information including: mapping, by a base station, a downlink control channel carrying multiple downlink control information corresponding to multiple user equipment UEs on a preset physical resource, where The downlink control channel carries a downlink control information group identifier corresponding to the multiple downlink control information; the base station sends the mapped multiple downlink control information.
  • the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information.
  • the frequency domain of the predetermined physical resource is one of: a central frequency band of the subframe; a frequency band configured by the signaling.
  • the domain of the predetermined physical resource is: consecutive h OFDM symbols starting from the kth orthogonal frequency division multiplexing OFDM symbol of the subframe, where k and h are preset integers.
  • the multiple downlink control information includes: scheduling information of a physical uplink shared channel and/or scheduling information of a physical T-line shared channel.
  • each of the plurality of downlink control information includes an information header carrying at least one of the information: the indication information of the downlink control information, and an identifier used to distinguish the downlink control information.
  • the indication information of the downlink control information includes at least one of the following: a public information type, a UE device specific information type, a Physical Downlink Shared Channel (PDSCH) scheduling information, and a PUSCH scheduling.
  • the method further includes: jointly coding the multiple downlink control information, where The plurality of T-line control information corresponds to one Cyclic Redundancy Check (CRC) code.
  • CRC Cyclic Redundancy Check
  • the CRC code is scrambled using the downlink control information group identifier.
  • a method for detecting a downlink channel including: a user equipment UE acquiring a downlink control information group identifier corresponding to downlink control information of the UE; and using, by the UE, the downlink control information group identifier
  • the physical downlink control channel is detected on the preset physical resource.
  • the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information.
  • the frequency domain of the predetermined physical resource is one of T: a central frequency band of the subframe; a frequency band configured by signaling.
  • each downlink control information of the multiple downlink control information includes: scheduling information of a physical uplink shared channel and/or scheduling information of a physical downlink shared channel.
  • each of the plurality of downlink control information includes an information header that carries at least one of the following information: the indication information of the downlink control information, and the identifier for distinguishing the downlink control information.
  • the indication information of the downlink control information includes at least one of the following: a public information type, a user equipment UE proprietary information type, a physical downlink shared channel PDSCH related scheduling, a PUSCH scheduling information, a row control information format, and a downlink control.
  • the size of the message is not limited to the following: a public information type, a user equipment UE proprietary information type, a physical downlink shared channel PDSCH related scheduling, a PUSCH scheduling information, a row control information format, and a downlink control.
  • the size of the message is further includes: using, by the UE, an identifier of downlink control information of the UE, where the detected The downlink control information corresponding to the identifier is obtained from the multiple physical downlink control information carried on the physical downlink control channel.
  • the method further includes: the UE, according to the obtained downlink control information, Receive data of a physical downlink shared channel or transmit data on a physical uplink shared channel.
  • the UE comprises: a machine type communication (MTC) terminal.
  • MTC machine type communication
  • a device for transmitting downlink control information including: a mapping module, configured to map a T-line control channel carrying multiple downlink control information corresponding to a plurality of user equipment UEs in a pre-
  • the downlink control channel carries a downlink control information group identifier corresponding to the multiple downlink control information
  • the sending module is configured to send the mapped multiple downlink control information.
  • the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information.
  • the frequency domain of the predetermined physical resource is one of: a central frequency band of the subframe; a frequency band configured by the signaling.
  • the time domain of the predetermined physical resource is: consecutive h OFDM symbols starting from the kth orthogonal frequency division multiplexing OFDM symbol of the subframe, where k and h are preset integers.
  • the multiple downlink control information includes: scheduling information of a physical uplink shared channel and/or scheduling information of a physical downlink shared channel.
  • each of the plurality of downlink control information includes an information header carrying at least one of the T information: the indication information of the downlink control information, and an identifier for distinguishing the downlink control information.
  • the indication information of the downlink control information includes at least one of the following: a public information type, a UE local information type, a physical downlink shared channel PDSCH scheduling information, a PUSCH scheduling information, and a T line control information format.
  • the size of the downlink control information Preferably, the foregoing apparatus further includes: an encoding module, configured to jointly encode the multiple downlink control information, where the multiple downlink control information corresponds to one cyclic redundancy check CRC code.
  • the CRC code is scrambled by using the downlink control information group identifier.
  • a downlink channel detecting apparatus which is applied to a UE, and includes: an acquiring module, configured to acquire a downlink control information group identifier corresponding to downlink control information of the UE: a detecting module, configured to The physical T-line control channel is detected on the preset physical resource by using the downlink control information group identifier.
  • the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information.
  • the frequency domain of the predetermined physical resource is one of T: a central frequency band of the subframe; a frequency band configured by signaling.
  • each downlink control information of the multiple downlink control information includes: scheduling information of a physical uplink shared channel and/or scheduling information of a physical downlink shared channel.
  • each of the plurality of downlink control information includes an information header carrying at least one of the T information: the indication information of the downlink control information, and the identifier for distinguishing the downlink control information.
  • the indication information of the downlink control information includes at least one of the following: a public information type, a UE device-specific information type, a physical downlink shared channel PDSCH-related scheduling, a PUSCH scheduling information, and a T-line control information format.
  • the size of the downlink control information is not limited to the following: a public information type, a UE device-specific information type, a physical downlink shared channel PDSCH-related scheduling, a PUSCH scheduling information, and a T-line control information format.
  • the size of the downlink control information further includes: an obtaining module, configured to obtain, by using the identifier of the downlink control information of the UE, the downlink control corresponding to the identifier from the multiple physical downlink control information that is received on the physical downlink control channel that is detected information.
  • the method further includes: a receiving module, configured to receive data of a physical downlink shared channel or send data on a physical uplink shared channel according to the acquired downlink control information.
  • the UE includes: an MTC terminal.
  • the downlink control channel carrying the plurality of downlink control information corresponding to the multiple UEs is mapped on the preset physical resource, where the row control channel carries the corresponding multiple row control
  • the downlink control information identifier of the information is sent, and the multiple downlink control information after the mapping is sent, and the multiple downlink control information corresponding to the multiple UEs are jointly processed and transmitted, thereby reducing the overhead of the downlink control channel, and solving the problem.
  • FIG. 1 is a schematic diagram of a frame structure of an FDD mode in Ui'E of the related art
  • 2 is a schematic diagram of a frame structure of a TDD mode in LTE according to the related art
  • FIG. 3 is a schematic diagram of a location of an MTC access system in a LE of the related art
  • FIG. 4 is a flowchart of a method for transmitting T-line control information according to an embodiment of the present invention
  • 5 is a flowchart of a method for detecting a downlink control channel according to an embodiment of the present invention
  • FIG. 6 is a block diagram showing a structure of a device for transmitting downlink control information according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 4, the method includes steps S402 and T1. S404.
  • Step S402 The base station maps a downlink control channel that carries multiple downlink control information corresponding to multiple UEs to a preset physical resource, where the downlink control channel carries a downlink control information group corresponding to the multiple downlink control information.
  • logo Step S404: The base station sends the mapped multiple downlink control information.
  • the downlink control channel carries the downlink control channel carrying the multiple downlink control information corresponding to the multiple UEs on the preset physical resource, where the downlink control channel carries the downlink corresponding to the multiple downlink control information. Controlling the information identifier, and transmitting the mapped multiple downlink control information, implementing joint processing of multiple downlink control information corresponding to multiple UEs, and transmitting, reducing the overhead of the downlink control channel, and solving the problem in the network If the number of the MTC UEs is large, especially if one downlink control information of one UE corresponds to one physical downlink control channel, the cost of the physical downlink control channel is relatively large. The efficiency of downlink scheduling and the spectrum utilization of the system.
  • the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information.
  • the downlink control channel carries information shared by multiple control information, which reduces the load of channel transmission bits.
  • the mapping can be performed on a predetermined physical resource, and can be divided into two ways according to the time domain and the frequency domain: According to the frequency domain, the frequency domain of the predetermined physical resource is one of T: the center frequency band of the subframe; the frequency band configured by the signaling. Mapping on predetermined frequency domain resources reduces the complexity of the detection.
  • the domain of the predetermined physical resource is: consecutive h OFDM symbols starting from the kth orthogonal frequency division multiplexing OFDM symbol of the subframe, where k and h are preset integers. Mapping on predetermined time domain resources reduces the complexity of detection.
  • the multiple downlink control information includes: scheduling information of a physical uplink shared channel and/or scheduling information of a physical downlink shared channel.
  • the downlink control information of the preferred embodiment includes the scheduling information of the physical uplink and downlink shared channel, so that the terminal can perform uplink data transmission according to the received scheduling information of the physical uplink shared channel, or perform downlink data transmission according to the scheduling information of the physical downlink shared channel. .
  • each of the plurality of downlink control information includes an information header that carries at least one of the following information: indication information of the downlink control information, and identifier for distinguishing the downlink control information.
  • the identifier carried by the preferred implementation can implement downlink control information for distinguishing multiple UEs, and implements accuracy of downlink control information reception.
  • the indication information of the T-line control information includes at least one of the following: a public information type, a UE-specific information type, a PDSCH scheduling information, a PUSCH scheduling information, a downlink control information format, and a downlink control information.
  • the multiple downlink control information may be jointly encoded, where the multiple downlink control information corresponds to one cyclic redundancy sleep CRC code.
  • the downlink control information group identifier can be used to perform scrambling on the CRC code.
  • the preferred embodiment uses the identifiers known to both the transmitting end and the receiving end for scrambling, improving the efficiency of scrambling and descrambling.
  • This embodiment provides a method for transmitting downlink control information.
  • FIG. 5 is a flowchart of a method for detecting a downlink control channel according to an embodiment of the present invention. As shown in FIG. 5, the method includes steps S502 and T1.
  • Step S502 The UE acquires the downlink control information group identifier corresponding to the downlink control information of the LIE.
  • Step S504 The UE uses the downlink control information group identifier to detect the physical downlink control channel on the preset physical resource. Through the foregoing steps, the UE obtains the downlink control information group identifier corresponding to the downlink control information, and uses the identifier to detect the physical downlink channel on the preset physical resource, thereby implementing joint processing of multiple T lines of control information in multiple UEs.
  • the UE detects the T-line control channel, and solves the problem that the number of users in the network is relatively large, especially when the number of MTC UEs is large, if one downlink control information of one UE corresponds to
  • the physical downlink control channel has a large overhead, which reduces the overhead of the downlink control channel, thereby improving the efficiency of the downlink scheduling and the spectrum of the system.
  • the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information.
  • the downlink control channel carries information shared by multiple control information, which reduces the load of channel transmission bits.
  • the multiple downlink control information may be mapped on a predetermined physical resource, and may be divided into two modes according to the time domain and the frequency domain:
  • the frequency domain of the predetermined physical resource is one of the following: Central band; the frequency band in which the signaling is configured. Mapping on predetermined frequency domain resources reduces the complexity of the detection.
  • the domain of the predetermined physical resource is: consecutive h OFDM symbols starting from the kth orthogonal frequency division multiplexing OFDM symbol of the subframe, where k and h are preset integers. Mapping on predetermined time domain resources reduces the complexity of the detection.
  • the multiple downlink control information includes: scheduling information of a physical uplink shared channel and/or scheduling information of a physical T-line shared channel.
  • the downlink control information of the preferred embodiment includes the scheduling information of the physical uplink and downlink shared channel, so that the terminal can perform uplink data transmission according to the received scheduling information of the physical uplink shared channel, or perform downlink data transmission according to the scheduling information of the physical downlink shared channel.
  • each of the plurality of downlink control information includes an information header that carries at least one of the following information: indication information of the downlink control information, and identifier for distinguishing the downlink control information.
  • the identifier carried by the preferred embodiment can implement downlink control information for distinguishing multiple UEs, and implements accuracy of downlink control information reception.
  • the indication information of the downlink control information includes at least one of T: a public information type, a UE-specific information type, a PDSCH scheduling information, a PUSCH scheduling information, a downlink control information format, and a downlink control information.
  • the method further includes: the UE obtaining the identifier of the downlink control information of the UE, and obtaining the identifier corresponding to the identifier from the detected multiple physical downlink control information carried on the physical downlink control channel T line control information.
  • the preferred implementation uses the identifier of the T-line control information of the UE to obtain the downlink control information corresponding to the identifier in the multiple T-line control information, which improves the accuracy of the UE acquiring the downlink control information.
  • the method further includes: the UE, after the downlink control information corresponding to the identifier is obtained by using the multiple physical downlink control information that is received on the physical downlink control channel. Receiving data of the physical downlink shared channel or transmitting data on the physical uplink shared channel according to the obtained downlink control information. This preferably implements transmission of data according to the uplink and downlink shared channel, and improves data transmission performance of the UE.
  • the UE comprises: a machine type communication (MTC) terminal.
  • MTC machine type communication
  • the steps shown in the flowchart of the accompanying drawings may be performed in an if-computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some Case T, the steps shown or described may be performed in an order different from that herein.
  • a software for transmitting downlink control information is provided, and the software is configured to perform the technical solutions described in the foregoing embodiments and preferred embodiments.
  • a storage medium where the transmission software of the downlink control information is stored, and the storage medium includes, but is not limited to, an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like.
  • the embodiment of the present invention further provides a device for transmitting downlink control information, which is applied to a base station, where the device for transmitting downlink control information can be used to implement the method for transmitting downlink control information and a preferred implementation manner. The description will not be repeated.
  • the modules involved in the transmission device of the downlink control information will be described below. As the following, the term "module" can implement a combination of software and/or hardware for a predetermined function.
  • FIG. 6 is a structural block diagram of a device for transmitting downlink control information according to an embodiment of the present invention.
  • the device includes: a mapping module 62 and a transmitting module 64.
  • the mapping module 62 is configured to map, on the preset physical resource, a row control channel that carries multiple downlink control information corresponding to the multiple user equipment UEs, where the multiple downlink control information carries information corresponding to the multiple downlink control information.
  • the T line control information group identifier; the sending module 64 is connected to the mapping module 62, and is configured to send the plurality of downlink control information mapped by the mapping module 62.
  • a detection software for the downlink control channel is provided, and the software is configured to perform the technical solutions described in the foregoing embodiments and preferred embodiments.
  • a storage medium is provided, where the detection software of the downlink control channel is stored, and the storage medium includes, but is not limited to, an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like.
  • the embodiment of the present invention further provides a downlink control channel detection apparatus, which is applied to a UE, and the downlink control channel detection apparatus can be used to implement the foregoing downlink control channel detection method and a preferred implementation manner, which have been described.
  • the modules involved in the detection device of the downlink control channel will be described below.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • FIG. 7 is a structural block diagram of a device for detecting a downlink control channel according to an embodiment of the present invention. As shown in FIG.
  • the device includes: an obtaining module 72 and a detecting module 74.
  • the foregoing structure is described in detail below.
  • the obtaining module 72 is configured to obtain the downlink control information group identifier corresponding to the downlink control information of the UE
  • the detecting module 74 is connected to the obtaining module 72, and is configured to use the acquiring control module 72 to obtain the row control information group identifier in the preset physical
  • the physical row control channel is detected on the resource.
  • Step S302 Map the physical downlink control channel carrying the n downlink control information to the physical resource.
  • the downlink control information includes an information header, and the information header includes at least one of the following: an indication information of the downlink control information, and a distinguishing identifier of the n downlink control information.
  • Step S304 Send the downlink control information.
  • the information carried by the physical downlink control channel further includes downlink control information shared by the n downlink control information.
  • the frequency domain of the physical resource is one of T: a central frequency band of the subframe; a frequency band configured by signaling.
  • the time domain of the physical resource is: consecutive h OFDM symbols starting from the kth OFDM symbol of the subframe, where k, h are preset integers.
  • the downlink control information includes PDSCH (PUSCH) scheduling information.
  • the n downlink control information corresponds to one downlink control information group identifier (ID).
  • ID downlink control information group identifier
  • the n downlink control information is combined and encoded, wherein the n downlink control information generates 1 CRC, and the downlink control information group identifier scrambles the CRC.
  • one UE corresponds to one distinguishing identifier and one downlink control information group identifier.
  • the UE obtains the distinguishing identifier and the downlink control information group identifier according to the signaling and the UE ID.
  • the value of n may be a predefined value or may be configured by signaling.
  • the sub-bearer carrying the signaling is a predefined subframe.
  • the indication information of the downlink control information may include at least one of the following: a public information type, a UE-specific information type, a PDSCH scheduling information, a PUSCH scheduling information, a T-line control information format, and downlink control information.
  • the downlink control information of the MTC terminal with a low bandwidth is limited, and the MTC UE can successfully access the CTE system with a small bandwidth and effectively reduce the resources occupied by the physical downlink control channel.
  • the overhead which solves the problem of downlink scheduling congestion and the degradation of the spectrum efficiency of the system, can promote the evolution of the M2M service from the GSM system to the LTE system.
  • Preferred Embodiment 2 This embodiment provides a method for transmitting downlink control information. This embodiment includes steps T402 and S404.
  • Step S402 The base station sends n downlink control information on a predefined subframe, where the n downlink control information is carried on a physical downlink control channel, where the row control information includes an information header, and the information header includes at least the following A type of the downlink control information and a distinguishing identifier of the n downlink control information.
  • the PDSCH is received according to the downlink control information, or the PUSCH is sent according to the downlink control information.
  • the overhead of resources occupied by the physical downlink control channel can be effectively reduced, and the downlink scheduling congestion problem and the spectrum efficiency degradation of the system are solved.
  • the configuration of the downlink channel of the MTC UE and the terminal reception are described in detail below through the preferred embodiment 3 to the preferred embodiment 8. It should be noted that, in the following embodiments, the receiving and transmitting bandwidth of the bandwidth-limited MTC UE may be predefined as a small bandwidth supported by an LTE system such as 1.4 MHz or 3 MHz or 5 MHz, or configured by higher layer signaling.
  • the embodiment has a system bandwidth of 10 MHz, and the MTC UE has a transmission and reception bandwidth of 1.4 MHz, and six RBs are illustrated, as shown in FIG. Preferred Embodiment 3
  • This embodiment provides a method for transmitting downlink control information.
  • the method in this embodiment includes a base station transmitting n downlink control information in a predefined subframe, where the n downlink control information is carried in one
  • the downlink control information includes an information header, where the information header includes indication information of the downlink control information and a distinguishing identifier of the n downlink control information.
  • the indication information of the downlink control information includes the size of the downlink control information.
  • the information header is located at the forefront (primary position) of the row control information; preferably, the T-line control information is a UE-specific downlink control. Information;
  • the downlink control information corresponding to the public control information is carried on a dedicated physical T-line control channel, and the physical downlink control channel scrambles the corresponding identifier of the public control information.
  • the base station determines the downlink control information group identifier and the distinguishing identifier corresponding to the UE, and carries the downlink control information of the UE identified by the same downlink control information group on one physical downlink control channel.
  • the distinguishing identifier is X bits
  • the proprietary downlink control information of the y UEs corresponds to one downlink control information group identifier
  • the base station transmits q physical downlink control channels on the predefined subframe t, and each physical downlink control channel carries the exclusiveness of 31 (q) UEs in the corresponding downlink control information group.
  • the number of UE-specific downlink control information corresponding to different downlink control information groups may be the same or different, and q is a positive integer.
  • the physical downlink control channel frequency domain location is on the z PRBs of the central bandwidth.
  • the z is one of 6, 15, 25; more preferably, z is the following - one: 6, 15, and 25.
  • the time domain position of the physical downlink control channel is the first n OFDM symbols of the second time slot of the subframe, or the time domain position is the last OFDM symbol starting from the kth OFDM symbol to the subframe, where k, n is a positive integer.
  • the k, n is one of the following i, 2, 3, 4, 5.
  • the UE is an MTC UE (Low Cost UE, M2M UE); preferably, the downlink control information includes at least one of the following: a transport block size, a modulation mode, and a data channel.
  • the UE detects the physical downlink control channel by using the corresponding downlink control information group identifier on the predefined time-frequency resource of the predefined subframe t.
  • the downlink control information carried by the physical downlink control channel is detected according to the corresponding distinguishing identifier, and the corresponding downlink control information is detected, where the UE determines according to the indication information of the downlink control information.
  • each downlink control information, /M determines the differentiated identifier location of the downlink control information.
  • the UE receives the PDSCH on the corresponding time-frequency resource.
  • the UE sends the PUSCH on the corresponding time-frequency resource.
  • Preferred Embodiment 4 This embodiment provides a method for transmitting downlink control information.
  • the method in this embodiment includes: The base station sends ti downlink control information in a predefined subframe, where the downlink control information is carried in On a physical downlink control channel, the downlink control information includes an information header, where the information header includes indication information of the downlink control information and a distinguishing identifier of the n downlink control information.
  • the indication information of the downlink control information includes a format of the downlink control information.
  • the header is located at the forefront (primary position) of the downlink control information.
  • the limp control information is UE-specific downlink control information and or public downlink control information.
  • the row control information format is DCi Format X/Y/Z, where DCI Format X represents UE-specific PDSCe-related scheduling information, DCI Fonrnt Y represents PDSCH-related scheduling information carried by public information, and DCI Format Z represents PUSCH-related scheduling information.
  • Scheduling information Preferably, one or more downlink control information groups may be associated with one or more downlink control information group identifiers in one cell.
  • the base station transmits q physical downlink control channels on the predefined subframe t, and each physical downlink control channel carries the exclusiveness of n (q) UEs in the corresponding downlink control information group.
  • the physical downlink control channel frequency domain location is on the z PRBs of the central bandwidth.
  • the z is one of the following: 6, 15, and 25.
  • the time domain location of the physical downlink control channel is the first n OFDM symbols of the second time slot of the subframe, or the time domain location is from the kth OFDM symbol to the last OFDM symbol of the subframe, where , k, n are positive integers.
  • the k, n are one of: 1, 2, 3, 4, 5.
  • the UE in this embodiment is an MTC UE (Low Cost UE, M2M UE).
  • the downlink control information includes at least one of the following: a transmission block size, a modulation mode, and a frequency of a data channel (PDSCH or PUSCH).
  • the UE may detect the physical downlink control channel by using a corresponding downlink control information group identifier on a predefined time-frequency resource of the predefined subframe t.
  • the downlink control information carried by the physical downlink control channel is detected according to the corresponding distinguishing identifier, and the corresponding downlink control information is detected, where the UE determines according to the indication information of the downlink control information.
  • the size of each downlink control information thereby determining the differentiated identification location of the downlink control information.
  • the UE receives the PDSCH on the corresponding time-frequency resource.
  • the UE sends the PUSCH on the corresponding time-frequency resource.
  • This embodiment provides a method for transmitting downlink control information.
  • the method in this embodiment includes: The base station sends ri downlink control information on a predefined child, where the n downlink control information is carried in On a physical T-line control channel, the downlink control information includes an information header, where the information header includes indication information of the downlink control information and a distinguishing identifier of the n downlink control information.
  • the information carried by the physical downlink control channel further includes: Public downlink control information.
  • the public downlink control information indicates that each of the n downlink control information carried by the physical downlink control channel includes the public information.
  • the public downlink control information includes: a transport block size, a corresponding number of resource blocks, and a modulation mode; that is, the PDSCH (PUSCH) of the physical downlink control channel carrying downlink control information scheduling has the same transport block size or the same modulation mode or The same number of resource blocks.
  • the indication information of the T line control information includes a format of the downlink control information.
  • the header is located at the forefront (primary position) of the downlink control information.
  • the downlink control information is UE-specific downlink control information and or public downlink control information.
  • the basic control information group identifier and the differentiated identifier corresponding to the UE are determined, and the downlink control information of the UE identified by the same downlink control information group is carried on one physical downlink control channel.
  • the distinguishing identifier is X bits
  • the proprietary downlink control information of the y UEs corresponds to one downlink control information group identifier
  • the downlink control information format is DCI Format X/Y/Z, where DCI Format X represents UE-specific PDSCH-related scheduling information, DCI Format Y represents PDSCH scheduling information carried by public information, and DCI Format Z represents PUSCH scheduling information.
  • one or more downlink control information groups may exist in one cell, corresponding to one or more downlink control information group identifiers.
  • the base station transmits q physical downlink control channels on the predefined subframe t, and each physical downlink control channel carries the exclusiveity of n (q) UEs in the corresponding downlink control information group.
  • the number of UE-specific downlink control information corresponding to different downlink control information groups may be the same or different.
  • the physical downlink control channel frequency domain location is on the z PRBs of the central bandwidth.
  • the z is one of the following: 6, 15, and 25.
  • the time domain position of the physical downlink control channel is the first n OFDM symbols of the second slot of the subframe, or the time domain position is from the kth OFDM symbol to the last OFDM symbol of the subframe, where k, n is a positive integer.
  • the k, n are the following - one: 1, 2, 3, 4, 5.
  • the UE is an MTC UE (M2M UE); preferably, the downlink control information includes at least one of: a transport block size, a modulation scheme, a frequency domain location of a data channel (PDSCH or PUSCH), and new data.
  • the physical downlink control channel is detected on the predefined time-frequency resource of the defined subframe t by using the corresponding downlink control information group identifier.
  • the downlink control information carried by the physical downlink control channel is detected according to the corresponding distinguishing identifier, and the corresponding downlink control information is detected, where the UE determines according to the indication information of the downlink control information.
  • the size of each downlink control information, thereby determining the differentiated identifier location of the downlink control information preferably, when the row control information is detected and the downlink control information is PDSCH-related scheduling information,
  • the UE receives the PDSCH on the corresponding time-frequency resource.
  • the UE sends the PUSCHo on the corresponding time-frequency resource, and the foregoing embodiment provides a downlink control information transmission method.
  • the information carried on a physical row control channel includes n downlink control information, where the downlink control information includes an information header, and the information header includes a distinguishing identifier.
  • the base station sends information carried on the physical downlink control channel in a predefined subframe.
  • the information header is located at the forefront (primary position) of the T-line control information.
  • the information may be classified into the following manners according to different information carried in the downlink control information:
  • the fixed distinguishing identifier indicates the public downlink control information, and the differentiated identifier indicates the UE-specific row control information, wherein the remaining distinguishing identifiers are even-numbered
  • the time indicates the scheduling information of the PDSCH, and the scheduling information indicating the PUSCH when the distinguishing identifier is an odd number in the remaining distinguishing identifiers, or the scheduling information indicating the PDSCH when the distinguishing identifiers in the remaining distinguishing identifiers are odd, and the distinguishing identifiers in the remaining distinguishing identifiers are even numbers
  • the size of the PDSCH scheduling information is a predefined value.
  • the size of the PUSCH scheduling information is a predefined value.
  • the mode 2 downlink control information includes UE-specific downlink control information.
  • the scheduling information indicating the PDSCH is an even number, and the scheduling information indicating the PUSCH when the identifier is an odd number, or the scheduling information indicating the PDSCH when the identifier is an odd number, and the scheduling information indicating the PUSCH when the identifier is an even number.
  • the size of the PDSCH scheduling information is a predefined value.
  • the size of the PUSCH scheduling information is a predefined value.
  • the base station determines the downlink control information group identifier and the distinguishing identifier corresponding to the UE, and carries the downlink control information of the UE identified by the same T-line control information group on one physical downlink control channel;
  • the example provides a method for transmitting downlink control information.
  • one or more downlink control information groups may be included in one cell, corresponding to one or more downlink control information group identifiers.
  • the base station transmits q physical T-line control channels on a predefined subframe t, and each physical downlink control channel carries proprietary downlink control information of n (q) UEs in the corresponding T-line control information group;
  • the number of UE-specific downlink control information corresponding to different T-line control information groups may be the same or different, and q is a positive integer.
  • the physical downlink control channel frequency domain location is on the z PRBs of the central bandwidth.
  • z is one of the following: 6, 15, and 25.
  • the ⁇ domain location of the physical downlink control channel is the first n OFDM symbols of the second slot of the subframe, or the time domain location is the last OFDM symbol starting from the kth OFDM symbol to the subframe, where k , ⁇ is a positive integer.
  • k, n is one of the following: 1, 2, 3, 4, 5.
  • the UE is an MTC UE (Low Cost UE, M2M UE).
  • the downlink control information includes at least one of: a transport block size, a modulation scheme, a frequency domain location of a data channel (PDSCH or PUSCH), a new data indication, a power control indication, a corresponding sequence code resource, a data channel (PDSCH or PUSCH) The number of corresponding PRBs and the subframe indication in which the data channel is located.
  • the UE detects the physical downlink control channel by using a corresponding downlink control information group identifier on a predefined time-frequency resource of the predefined subframe t.
  • the UE may detect the physical downlink control channel on the predefined frequency resource according to the quantity of one or more types of T-line control information; the UE may also have one or more time-frequency positions at the predefined frequency.
  • the physical downlink control channel is detected on the resource.
  • detecting the physical downlink control channel detecting, according to the corresponding differentiated identifier, the T-line control information carried in the physical T-channel control channel, wherein the UE has corresponding T-line control information, where the UE is configured according to the downlink control information.
  • the indication information determines the size of each downlink control information, thereby determining the differentiated identification location of the downlink control information.
  • the UE receives the PDSCH on the corresponding time-frequency resource.
  • the subframe in which the PDSCH is transmitted may be the same as or different from the subframe in which the physical downlink control channel is detected (equivalent to cross-frame scheduling).
  • the PDSCH may be a PDSCH on one subframe, and the PDSCH may also be a PDSCH on multiple subframes.
  • the downlink control information is PUSCH-related scheduling information
  • the UE transmits the PUSCH on the corresponding time-frequency resource.
  • the PUSCH may be a PUSCH on one subframe, and the PUSCH may also be a PUSCH on multiple subframes.
  • the foregoing embodiment is described by using an MTC UE, but the method in the foregoing embodiment is also applicable to a normal UE.
  • the foregoing embodiment provides a method for detecting downlink control information and a method for detecting a downlink control channel, where the base station maps a row control channel carrying multiple downlink control information corresponding to multiple UEs to a preset physical resource.
  • the downlink control channel carries the row control information identifier corresponding to the multiple downlink control information, and sends the mapped multiple downlink control information to implement multiple downlink control information corresponding to multiple UEs.
  • the joint processing and the transmission are performed, which reduces the overhead of the downlink control channel, and solves the problem that the number of the 3 ⁇ 4 households in the network is relatively large, especially when the number of MTC UEs is large, if one downlink control information of one UE corresponds to 1
  • a physical T-line control channel will cause a large overhead of the physical T-line control channel, and JA improves the efficiency of T-line scheduling and the spectrum utilization of the system. It should be noted that these technical effects are not all of the above embodiments, and some technical effects are obtained by some preferred embodiments.
  • the method proposed by the present invention effectively reduces the overhead of resources occupied by the physical downlink control channel, thereby solving the problem of line scheduling congestion and the degradation of the spectrum efficiency of the system.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed among multiple computing devices.
  • they may be implemented by program code executable by the computing device, so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil d'envoi d'informations de commande en liaison descendante, et un procédé et un appareil de détection d'un canal de commande de liaison descendante. Le procédé d'envoi des informations de commande de liaison descendante comprend : une station de base de mappage d'un canal de commande de liaison descendante de support d'une pluralité d'éléments des informations de commande de liaison descendante correspondant à une pluralité d'équipements d'utilisateur sur une ressource physique prédéfinie, le canal de commande de liaison descendante supportant un identifiant de groupe d'informations de commande de liaison descendante correspondant à la pluralité des éléments d'informations de commande de liaison descendante; et la station de base envoyant de la pluralité des éléments d'informations de commande de liaison descendante après le mappage. Au moyen de la présente invention, l'efficacité d'envoi informations de commande de liaison descendante est améliorée.
PCT/CN2013/070607 2012-01-20 2013-01-17 Procédé et appareil d'envoi d'informations de commande de liaison descendante, procédé et appareil détection de canal de commande de liaison descendante WO2013107364A1 (fr)

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