WO2013107364A1

WO2013107364A1 - Method and apparatus for sending downlink control information, method and apparatus for detecting downlink control channel

Info

Publication number: WO2013107364A1
Application number: PCT/CN2013/070607
Authority: WO
Inventors: 戴博; 石靖; 李新彩; 毕峰; 夏树强; 方惠英
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-01-20
Filing date: 2013-01-17
Publication date: 2013-07-25
Also published as: CN103220690A

Abstract

Disclosed are a method and an apparatus for sending downlink control information, and a method and an apparatus for detecting a downlink control channel. The method for sending downlink control information comprises: a base station mapping a downlink control channel bearing a plurality of pieces of downlink control information corresponding to a plurality of user equipments (UEs) onto a preset physical resource, the downlink control channel carrying a downlink control information group identifier corresponding to the plurality of pieces of downlink control information; and the base station sending the plurality of pieces of downlink control information after the mapping. By means of the present invention, the efficiency of sending downlink control information is improved.

Description

TECHNICAL FIELD 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. BACKGROUND OF THE INVENTION Machine Type Communication (MTC) User Terminal (MTC User Equipment, MTC UE for short), also known as 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. At present, 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. In recent years, due to the high spectrum efficiency of Long Term Evolution (LTE), more and more mobile operators have chosen U'E as the evolution direction of future broadband wireless communication systems. U'E-based M2M multi-class data services will also be more attractive. Only Έ·.Μ2Μ equipment can be operated at a lower cost than the GSM system's MTC terminal, and the Μ2Μ service can actually be transferred from GSM to U'E system. The cost of affecting MTC UEs is mainly in baseband processing and radio frequency. Reducing the transmit and receive bandwidth is a very effective way to reduce the cost of MTC UEs. That is, 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. 1 is a schematic diagram of a frame structure of an FDD mode in the LTE technology of the related art. As shown in FIG. 1, 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. In the above two frame structures, for 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. For the Extended Cyclic Prefix (Extended Cyclic Prefix), one slot contains 6 symbols, and the CP length of all symbols is 16.67us. . The following is the definition of the downlink physical control channel: Physical Control Format Indicator Channel (PCFKi-!), Physical Hybrid Automatic Retransmission Request Indicator Channel (referred to as Physical Hybrid Automatic Retransmission Request Indicator Channel) It is a PHICH), and a physical downlink control channel (Physical Downlink Control Channel) is called a PDCCH. 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. For the case of the downstream bandwidth ^^ ^{> 1()} , CFI can take 1, 2 or 3. For ^N ^ ^≤ ^{j 0RB} , 2, 3 or 4, that is, CFI+1 can be taken.

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. 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 2, 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. If the number of the 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 one physical downlink control channel, the cost of the physical downlink control channel is relatively large. SUMMARY OF THE INVENTION In view of the fact that the number of households in the network is relatively large, especially in the case of a large number of MTC UEs, if one is

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. To solve at least the problem. According to an aspect of the present invention, a method for transmitting downlink control information is provided, 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. Preferably, the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information. Preferably, 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. Preferably, 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. Preferably, 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. Preferably, 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. Preferably, 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. Information, downlink control information format, and size of downlink control information. Preferably, before the T-line control channel carrying the plurality of downlink control information corresponding to the multiple user equipments UE is mapped on the predetermined physical resource, 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. Preferably, the CRC code is scrambled using the downlink control information group identifier. According to an aspect of the present invention, a method for detecting a downlink channel is provided, 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. Preferably, the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information. Preferably, 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. Preferably, 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. Preferably, 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. Preferably, 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. Preferably, 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. Preferably, after the detecting, by the UE, the physical downlink control channel on the preset physical resource by using the downlink control information group identifier, the method 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. After the downlink control information corresponding to the identifier is obtained from the multiple physical downlink control information that is received 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. Preferably, the UE comprises: a machine type communication (MTC) terminal. According to another aspect of the present invention, a device for transmitting downlink control information is provided, 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, and the sending module is configured to send the mapped multiple downlink control information. Preferably, the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information. Preferably, 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. Preferably, 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. Preferably, the multiple downlink control information includes: scheduling information of a physical uplink shared channel and/or scheduling information of a physical downlink shared channel. Preferably, 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. Preferably, 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. Preferably, the CRC code is scrambled by using the downlink control information group identifier. According to another aspect of the present invention, a downlink channel detecting apparatus is provided, 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. Preferably, the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information. Preferably, 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. Preferably, 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. Preferably, 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. Preferably, 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. Preferably, 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. Preferably, the method 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. Preferably, 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. Preferably, the UE includes: an MTC terminal. According to the present invention, 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. 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 one physical downlink control channel, the cost of the physical downlink control channel is relatively large. Thereby improving the efficiency of the downlink scheduling and the spectrum of the system. The accompanying drawings, which are set forth to illustrate, illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the accompanying drawings - 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; and FIG. A block diagram of the structure of the detection device of the control channel. detailed description

The invention will be described in detail with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. This embodiment provides a method for transmitting downlink control information. 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. In implementation, the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information. In the preferred embodiment, the downlink control channel carries information shared by multiple control information, which reduces the load of channel transmission bits. Preferably, 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. According to the time domain, 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. In implementation, 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. . Preferably, 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. Preferably, 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. In the implementation, in order to improve the efficiency of the transmission, before the step S402, the multiple downlink control information may be jointly encoded, where the multiple downlink control information corresponds to one cyclic redundancy sleep CRC code. This preferred implementation increases the reliability of the transmission. Preferably, 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. S504. 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. In the case of the transmission, 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. In implementation, the information carried by the downlink control channel further includes downlink control information that is shared by the multiple downlink control information. In the preferred embodiment, the downlink control channel carries information shared by multiple control information, which reduces the load of channel transmission bits. Preferably, 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: According to 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. According to the time domain, 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. In implementation, 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. . Preferably, 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. Preferably, 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. In the implementation, after the step S504, 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. As a preferred implementation, after obtaining the downlink control information corresponding to the identifier, 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. Preferably, the UE comprises: a machine type communication (MTC) terminal. It should be noted that 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. In another embodiment, 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. In another embodiment, a storage medium is provided, 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. Although the systems and methods described in the following embodiments are preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated. FIG. 6 is a structural block diagram of a device for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 6, the device includes: a mapping module 62 and a transmitting module 64. The foregoing structure is described in detail below. 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. In another embodiment, 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. In another embodiment, 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. For further details, the modules involved in the detection device of the downlink control channel will be described below. As the case of T, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the systems and methods described in the following embodiments are preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated. 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. 7, 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, and 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.

The T-plane will be described in connection with the preferred embodiments, and the following preferred embodiments are combined with the above-described embodiments and preferred embodiments. Preferred Embodiment 1 This embodiment provides a method for transmitting downlink control information, where the method includes the following steps S S302 and S304. 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. Preferably, the information carried by the physical downlink control channel further includes downlink control information shared by the n downlink control information. Preferably, the frequency domain of the physical resource is one of T: a central frequency band of the subframe; a frequency band configured by signaling. Preferably, 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. In this embodiment, the downlink control information includes PDSCH (PUSCH) scheduling information. Preferably, the n downlink control information corresponds to one downlink control information group identifier (ID). Preferably, 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. Preferably, one UE corresponds to one distinguishing identifier and one downlink control information group identifier. Preferably, the UE obtains the distinguishing identifier and the downlink control information group identifier according to the signaling and the UE ID. Preferably, the value of n may be a predefined value or may be configured by signaling. It should be noted that the sub-bearer carrying the signaling is a predefined subframe. Preferably, 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. With the preferred embodiment, 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. Step S404: The UE detects the physical downlink control channel on the predefined time-frequency resource by using the corresponding downlink control information group identifier. Preferably, in step S404, when the physical downlink control channel is detected, the corresponding downlink identifier is used, and whether the n downlink control information carried on the physical downlink control channel has a downlink matching the distinguishing identifier Control information. Preferably, when the downlink control information is detected, the PDSCH is received according to the downlink control information, or the PUSCH is sent according to the downlink control information. By using the solution in this embodiment, 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. To make the invention more clear, 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 On the 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. Preferably, the indication information of the downlink control information includes the size of the downlink control information. In this embodiment, 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; As a preferred implementation manner, 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. Preferably, 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. For example, if the distinguishing identifier is X bits, the proprietary downlink control information of the y UEs corresponds to one downlink control information group identifier, and the y UEs correspond to different distinguishing identifiers, where y=2% preferably, 1 There may be one or more downlink control information groups in the cell, corresponding to one or more T-line control information group identifiers. In this embodiment, in the LTE system, 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. Downlink control information; 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. Preferably, the physical downlink control channel frequency domain location is on the z PRBs of the central bandwidth. Preferably, the z is one of 6, 15, 25; more preferably, z is the following - one: 6, 15, and 25. Preferably, 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. Preferably, the k, n is one of the following i, 2, 3, 4, 5. Preferably, 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 frequency domain position of the (PDSCH or PUSCH), the new data indication, the power control indication, the corresponding sequence code resource, the number of PRBs corresponding to the data channel (PDSCH or PUSCH), and the subframe indication in which the data channel is located. In this embodiment, 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. Preferably, after the physical downlink control channel is detected, 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, /M, determines the differentiated identifier location of the downlink control information. Preferably, when the downlink 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. . Preferably, when detecting that the T-line control information and the downlink control information are PUSCH-related scheduling information, 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. Preferably, the indication information of the downlink control information includes a format of the downlink control information. Preferably, the header is located at the forefront (primary position) of the downlink control information. Preferably, the limp control information is UE-specific downlink control information and or public downlink control information. In this embodiment, the base station determines the row 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 the i physical downlink control channels. For example, if the distinguishing identifier is _X bits, the proprietary downlink control information of the y UEs corresponds to one downlink control information group identifier, and the y UEs correspond to different distinguishing identifiers, where y= 2 ^x . 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. In this embodiment, in the LTE system, 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. Downlink control information; The number of UE-specific downlink control information corresponding to different downlink control information groups may be the same or different. Preferably, the physical downlink control channel frequency domain location is on the z PRBs of the central bandwidth. Preferably, the z is one of the following: 6, 15, and 25. Preferably, 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. Preferably, the k, n are one of: 1, 2, 3, 4, 5. Preferably, the UE in this embodiment is an MTC UE (Low Cost UE, M2M UE). Preferably, 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 location of the domain, the new data indication, the power control indication, the corresponding sequence code resource, the number of PRBs corresponding to the data channel (PDSCH or PUSCH), and the subframe indication in which the data channel is located. In this embodiment, 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. Preferably, after the physical downlink control channel is detected, 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. Preferably, when it is detected that the downlink control information ITF row control information is PDSCH related scheduling information, the UE receives the PDSCH on the corresponding time-frequency resource. Preferably, when detecting that the downlink control information TF row control information is PUSCH-related scheduling information, the UE sends the PUSCH on the corresponding time-frequency resource. Preferred Embodiment 5 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. Preferably, the information carried by the physical downlink control channel further includes: Public downlink control information. Preferably, 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. Preferably, 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. Preferably, the indication information of the T line control information includes a format of the downlink control information. Preferably, the header is located at the forefront (primary position) of the downlink control information. Preferably, the downlink control information is UE-specific downlink control information and or public downlink control information. Preferably, 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. For example, if the distinguishing identifier is X bits, the proprietary downlink control information of the y UEs corresponds to one downlink control information group identifier, and the y UEs correspond to different distinguishing identifiers, where y= 2 ^x . 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. Preferably, one or more downlink control information groups may exist in one cell, corresponding to one or more downlink control information group identifiers. In this embodiment, in the LTE system, 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. Downlink control information; The number of UE-specific downlink control information corresponding to different downlink control information groups may be the same or different. Preferably, the physical downlink control channel frequency domain location is on the z PRBs of the central bandwidth. Preferably, the z is one of the following: 6, 15, and 25. Preferably, 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. Preferably, the k, n are the following - one: 1, 2, 3, 4, 5. Preferably, 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 indication, the power control indication, the corresponding sequence code resource, the number of PRBs corresponding to the data channel (PDSCH or PUSCH), and the subframe indication in which the data channel is located; in this embodiment, for the receiving end (UE), the UE is in advance 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. Preferably, after the physical downlink control channel is detected, 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. Preferably, when the downlink control information is detected and the downlink control information is the PUSCH-related scheduling information, the UE sends the PUSCHo on the corresponding time-frequency resource, and the foregoing embodiment provides a downlink control information transmission method. In an implementation, 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. In this embodiment, the base station sends information carried on the physical downlink control channel in a predefined subframe. Preferably, 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 control information and the public 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 Indicates scheduling information of the PUSCH; 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. Preferably, the size of the PDSCH scheduling information is a predefined value. Preferably, the size of the PUSCH scheduling information is a predefined value. In the present embodiment, 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. In this embodiment, one or more downlink control information groups may be included in one cell, corresponding to one or more downlink control information group identifiers. In the UTE system, 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. Preferably, the physical downlink control channel frequency domain location is on the z PRBs of the central bandwidth. Preferably, z is one of the following: 6, 15, and 25. Preferably, 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 , η is a positive integer. Preferably, k, n is one of the following: 1, 2, 3, 4, 5. Preferably, the UE is an MTC UE (Low Cost 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), 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. Preferably, 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. Preferably, 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. Preferably, after 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. 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. Preferably, 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). Preferably, the PDSCH may be a PDSCH on one subframe, and the PDSCH may also be a PDSCH on multiple subframes. Preferably, when the row control information is detected, and the downlink control information is PUSCH-related scheduling information,

The UE transmits the PUSCH on the corresponding time-frequency resource. Preferably, the PUSCH may be a PUSCH on one subframe, and the PUSCH may also be a PUSCH on multiple subframes. It should be noted that 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. Through the foregoing implementation, 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. Obviously, those skilled in the art should understand that the above-described 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. On the network, optionally, 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. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, modifications, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A method for transmitting a row control information, comprising: mapping, by a base station, a downlink control channel carrying a plurality of downlink control information corresponding to a plurality of user equipment UEs on a preset physical resource, where the downlink control channel carries a corresponding a downlink control information group identifier of the multiple downlink control information;

The base station sends the plurality of downlink control information after the burst.

The method according to claim 1, wherein the information carried by the downlink control channel further includes downlink control information shared by the plurality of T lines of control information.

The method according to claim 1, wherein the frequency domain of the predetermined physical resource is one of: a central frequency band of a subframe; a frequency band configured by signaling.

The method according to claim 1, wherein the time domain of the predetermined physical resource is: consecutive 3 OFDM symbols starting from a kth orthogonal frequency division multiplexing OFDM symbol of a subframe, where k, 3ι Is a preset integer.

5. The method according to claim 1, wherein the multiple downlink control information comprises: scheduling information of a physical uplink shared channel and/or scheduling information of a physical downlink shared channel.

The method according to claim 1, wherein 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, used for Differentiating the identifier of the downlink control information.

The method according to claim 6, wherein the indication information of the downlink control information comprises at least - a public information type, a user equipment UE specific information type, a scheduling information of a physical downlink shared channel PDSCH, and a PUSCH. Scheduling information, downlink control information format, and size of downlink control information.

8. The method according to any one of claims 1 to 7, wherein before mapping a downlink control channel carrying a plurality of T-line control information corresponding to a plurality of user equipment UEs on a predetermined physical resource, Also includes:

And combining the multiple downlink control information, where the multiple downlink control information corresponds to 循环 cyclic redundancy check CRC codes.

9. The method according to claim 8, wherein the CRC code is scrambled using the downlink control information group identifier.

A method for detecting a downlink control channel, comprising: a user equipment UE acquiring a T-line control information group identifier corresponding to downlink control information of the UE; and using, by the UE, the downlink control information group identifier on a preset physical resource The physical downlink control channel is detected.

The method according to claim 10, wherein the information carried by the downlink control channel further comprises downlink control information shared by the plurality of T lines of control information.

The method according to claim 10, wherein the frequency domain of the predetermined physical resource is one of: a central frequency band of a subframe; a frequency band configured by signaling.

13. The method according to claim 10, wherein the time domain of the predetermined physical resource is: consecutive h OFDM symbols starting from a kth orthogonal frequency division multiplexing OFDM symbol of a subframe, where k, h is the default integer.

The method according to claim 10, wherein each of the plurality of downlink control information comprises: scheduling information of a physical uplink shared channel and/or scheduling information of a physical downlink shared channel.

The method according to claim 10, wherein each of the plurality of downlink control information comprises an information header carrying at least one of the following information: indication information of the downlink control information, used for Differentiating the identifier of the row control information.

The method of claim 15, wherein the indication information of the downlink control information comprises at least one of the following: a public information type, a user equipment UE specific information type, a physical downlink shared channel PDSCH related scheduling, a PUSCH Scheduling information, downlink control information format, and size of downlink control information.

The method according to any one of claims 10 to 10, wherein, after the detecting, by the UE, the physical downlink control channel on the preset physical resource by using the downlink control information group identifier, the method further includes:

The UE obtains the downlink control signal corresponding to the identifier by using the identifier of the downlink control information of the UE, and the plurality of physical downlink control information carried on the physical downlink control channel detected by the bundle.

The method according to claim 17, wherein after obtaining the downlink control information corresponding to the identifier from the plurality of physical downlink control information that is received on the physical downlink control channel, the method further includes:

The UE receives data of a physical downlink shared channel or transmits data on a physical uplink shared channel according to the acquired downlink control information.

The method according to any one of claims 10 to 16, wherein the UE comprises: a machine type communication MTC terminal.

20. A transmitting device for downlink control information, which should be used by a base station, comprising:

The mapping module is configured to map a downlink control channel that carries multiple downlink control information corresponding to multiple user equipment UEs on a preset physical resource, where the downlink control channel carries a downlink corresponding to the multiple downlink control information. Control information group identifier;

The sending module is configured to send the mapped downlink control information.

The device according to claim 20, wherein the information carried by the downlink control channel further comprises downlink control information shared by the plurality of downlink control information.

22. The apparatus according to claim 20, wherein a frequency domain of the predetermined physical resource is one of: a central frequency band of a subframe; a frequency band configured by signaling.

The apparatus according to claim 20, wherein: a time domain of the predetermined physical resource is: consecutive h OFDM symbols starting from a kth orthogonal frequency division multiplexing OFDM symbol of a subframe, where k, h is the default integer.

The device according to claim 20, wherein the multiple downlink control information comprises: scheduling information of a physical uplink sharing channel and/or scheduling information of a physical downlink shared channel.

The device according to claim 20, wherein each of the plurality of downlink control information comprises an information header carrying at least one of the following information: indication information of the downlink control information, used for Differentiating the identifier of the downlink control information.

The device according to claim 25, wherein the indication information of the downlink control information comprises at least one of the following: a public information type, a user equipment UE-specific information type, a scheduling information of a physical downlink shared channel PDSCH, and a PUSCH. Scheduling information, downlink control information format, and size of downlink control information.

The apparatus according to any one of claims 20 to 26, further comprising: And 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 apparatus of claim 27, wherein the CRC code is scrambled using the downlink control information group identifier. A device for detecting a T-line control channel, which should be used by the user equipment UE, includes:

The acquiring module is configured to obtain a downlink control information group identifier corresponding to the downlink control information of the UE;

The detecting module is configured to detect the physical downlink control channel on the preset physical resource by using the downlink control information group identifier. The device according to claim 29, wherein the information carried by the downlink control channel further comprises downlink control information shared by the plurality of downlink control information. The apparatus according to claim 29, wherein the frequency domain of the predetermined physical resource is one of: a central frequency band of the child; a frequency band configured by the signaling. The apparatus according to claim 29, wherein the time domain of the predetermined physical resource is: consecutive h OFDM symbols starting from a kth orthogonal frequency division multiplexing OFDM symbol of a subframe, where k, h are The default integer. The apparatus according to claim 29, wherein each of the plurality of downlink control information comprises: scheduling information of a physical uplink shared channel and/or scheduling information of a physical downlink shared channel. The device according to claim 29, wherein 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, The identifier of the downlink control information is distinguished. The apparatus according to claim 34, wherein the indication information of the downlink control information comprises at least one of the following: a public information type, a user equipment UE-specific information type, a physical downlink shared channel PDSCH-related scheduling, and a PUSCH scheduling. Information, downlink control information format, and size of downlink control information. The apparatus according to any one of claims 29 to 35, further comprising:

And an obtaining module, configured to obtain, by using the identifier of the downlink control information of the UE, the downlink control information corresponding to the identifier from the multiple physical downlink control information that is received on the physical downlink control channel that is detected.

37. The apparatus according to claim 36, further comprising:

The receiving module is configured to receive data of the physical downlink shared channel or send data on the physical uplink shared channel according to the obtained downlink control information.

The apparatus according to any one of claims 29 to 35, wherein the UE comprises: a machine type communication MTC terminal.