WO2015113198A1 - Control information transmission method in d2d communication, apparatus and communication system - Google Patents

Control information transmission method in d2d communication, apparatus and communication system Download PDF

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Publication number
WO2015113198A1
WO2015113198A1 PCT/CN2014/071652 CN2014071652W WO2015113198A1 WO 2015113198 A1 WO2015113198 A1 WO 2015113198A1 CN 2014071652 W CN2014071652 W CN 2014071652W WO 2015113198 A1 WO2015113198 A1 WO 2015113198A1
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Prior art keywords
communication
sequence
reference signal
resource
control information
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PCT/CN2014/071652
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French (fr)
Chinese (zh)
Inventor
温伟高
徐月巧
周华
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富士通株式会社
温伟高
徐月巧
周华
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Application filed by 富士通株式会社, 温伟高, 徐月巧, 周华 filed Critical 富士通株式会社
Priority to PCT/CN2014/071652 priority Critical patent/WO2015113198A1/en
Publication of WO2015113198A1 publication Critical patent/WO2015113198A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, a device, and a communication system for transmitting control information in device-to-device (D2D) communication.
  • D2D device-to-device
  • D2D communication is introduced in the LTE (Long Term Evolution) el.12, and the user equipment (UE) can communicate directly or partially without passing through the LTE base station (eNB).
  • This communication method can be used for broadcast communication such as public safety emergency communication, as well as for multicast communication between multiple user equipments and point-to-point communication between two user equipments.
  • the LTE system needs to solve some problems, such as: synchronization, signal modulation (such as OFDM or SC-FDMA), resource allocation (such as uplink resources or downlink resources), power control, and control information transmission. .
  • signal modulation such as OFDM or SC-FDMA
  • resource allocation such as uplink resources or downlink resources
  • power control and control information transmission.
  • dedicated control channels are designed for the downlink and uplink: Physical downlink control channel (PDCCH, Physical Downlink Control Channel) and Physical Uplink Control Channel (PUCCH).
  • PDCCH Physical downlink control channel
  • PUCCH Physical Uplink Control Channel
  • the PDCCH occupies the first 1 to 3 OFDM symbols of each LTE subframe in the time domain and occupies the entire system bandwidth in the frequency domain.
  • control information of multiple user equipments may be transmitted on the PDCCH orthogonally to each other.
  • the control channel of each user equipment is spread over the entire system bandwidth, and the occupied time-frequency resources are also discontinuous.
  • the user equipment blindly checks the entire control area to find corresponding control information.
  • the PUCCH is composed of one or more resource block pairs (RB pairs) at the edge of the uplink physical resource, and the user equipment transmits a Channel Quality Indicator (CQI)/Precoding Matrix Indicator (PMI) in the PUCCH.
  • CQI Channel Quality Indicator
  • PMI Precoding Matrix Indicator
  • SR Scheduling Request
  • HARQ Hybrid Automatic Repeat reQuest
  • Embodiments of the present invention provide a method, an apparatus, and a communication system for transmitting control information in D2D communication.
  • the problem of how to transmit control information in a D2D communication system is solved by a control channel including a reference signal sequence/preamble sequence and control information.
  • a method for transmitting control information in D2D communication includes:
  • control channel including control information for D2D communication and a reference signal sequence or preamble sequence indicating a location of the D2D communication resource;
  • control information for D2D communication and the reference signal sequence or preamble sequence are transmitted over the control channel.
  • a method for transmitting control information in D2D communication includes:
  • the control channel transmitting the control signal includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource;
  • a device for transmitting control information in D2D communication includes:
  • a channel configuration unit configured to control a channel for D2D communication, where the control channel includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource;
  • an information transmitting unit that transmits the control information for D2D communication and the reference signal sequence or preamble sequence through the control channel.
  • a device for transmitting control information in D2D communication includes:
  • An information receiving unit configured to receive a control signal for D2D communication, where the control channel for transmitting the control signal includes control information for D2D communication and a reference signal sequence or preamble indicating a location of the D2D communication resource Sequence
  • the information detecting unit detects the reference signal sequence or the preamble sequence to obtain the D2D communication resource location, and obtains the control information for D2D communication according to the D2D communication resource location.
  • a communication system includes: a first user equipment, configured with a control channel for D2D communication, where the control channel includes control information for D2D communication And a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource; and transmitting, by the control channel, the control information for D2D communication and the reference signal sequence or preamble sequence;
  • a second user equipment receiving a control signal for D2D communication, detecting the reference signal sequence or a preamble sequence to obtain the D2D communication resource location, and obtaining the control information for D2D communication according to the D2D communication resource location .
  • a computer readable program wherein when the program is executed in a user equipment, the program causes a computer to perform control in D2D communication as described above in the user equipment The method of transmitting information.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute a transmission method of control information in D2D communication as described above in a user equipment.
  • An advantageous effect of the embodiment of the present invention is that, by using a control channel including a reference signal sequence/preamble sequence and control information, the D2D receiving user equipment can obtain a D2D communication resource location according to the reference signal sequence/preamble sequence, and obtain the D2D communication resource location according to the D2D communication resource location. Control information for D2D communication.
  • the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced.
  • FIG. 1 is a flowchart of a method for transmitting control information in D2D communication according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of a D2D control channel in a conventional CP subframe according to Embodiment 1 of the present invention
  • 1 is a schematic diagram of a D2D control channel in an extended CP subframe
  • FIG. 4 is a schematic diagram of a subset according to a length of an RS sequence according to Embodiment 1 of the present invention
  • FIG. 5 is a sequence according to an RS sequence according to Embodiment 1 of the present invention
  • FIG. 6 is another schematic diagram of dividing a subset according to the length of the RS sequence according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of a D2D control channel in a conventional CP subframe according to Embodiment 1 of the present invention
  • 1 is a schematic diagram of a D2D control channel in an extended CP subframe
  • FIG. 7 is another embodiment of dividing the subset according to the length of the RS sequence according to Embodiment 1 of the present invention
  • FIG. 8 is another schematic diagram of dividing a subset according to the length of the RS sequence according to Embodiment 1 of the present invention
  • FIG. 9 is another schematic diagram of dividing the subset according to the length of the RS sequence according to Embodiment 1 of the present invention
  • FIG. 11 is another schematic diagram of dividing the subset according to the length of the RS sequence according to Embodiment 1 of the present invention
  • Figure 13 is another schematic diagram of a control channel according to Embodiment 1 of the present invention.
  • FIG. 14 is another schematic diagram of a control channel according to Embodiment 1 of the present invention.
  • Figure 15 is another schematic diagram of a control channel according to Embodiment 1 of the present invention.
  • FIG. 16 is another schematic diagram of a control channel according to Embodiment 1 of the present invention.
  • FIG 17 is a flowchart showing another process of control information according to Embodiment 1 of the present invention.
  • Figure 19 is another schematic diagram of a control channel according to Embodiment 1 of the present invention.
  • FIG. 20 is another schematic diagram of a control channel according to Embodiment 1 of the present invention
  • Figure 21 is a flowchart of a method for transmitting control information in D2D communication according to Embodiment 2 of the present invention
  • Figure 22 is a block diagram showing a configuration of a device for transmitting control information in 2D communication according to Embodiment 3 of the present invention
  • Figure 24 is a block diagram showing a configuration of a control device for transmitting information in 2D communication according to a fourth embodiment of the present invention
  • Figure 25 is a block diagram showing a configuration of a communication system according to a fifth embodiment of the present invention.
  • the embodiment of the present invention provides a method for transmitting control information in D2D communication, which is described from a D2D user equipment (a first user equipment, which may also be referred to as a D2D transmission user equipment) on the transmitting side.
  • a D2D user equipment a first user equipment, which may also be referred to as a D2D transmission user equipment
  • the transmission method includes:
  • Step 101 The first user equipment configures a control channel for D2D communication, where the control channel includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource.
  • Step 102 The first user equipment Control information for D2D communication and a reference signal sequence or preamble sequence are transmitted to the second user equipment over the control channel.
  • the first user equipment and the second user equipment are a pair of user equipments that perform D2D communication.
  • the first user equipment and the second user equipment may or may not be covered by the base station.
  • the present invention is not limited to this.
  • FIG. 2 is a schematic diagram of a D2D control channel in a normal cyclic prefix (CP) sub-frame according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a D2D control channel in an extended CP subframe according to an embodiment of the present invention.
  • CP normal cyclic prefix
  • control information for D2D communication may be configured on one or more resource elements (RE, Resource Element) close to a Demodulation Reference Signal (DM-RS); And the reference signal sequence/preamble sequence is configured on a first single carrier frequency division (SC-FDMA) symbol or an orthogonal step OFDM (Orthogonal Frequency Division Multiplexing) symbol of the subframe.
  • RE Resource Element
  • DM-RS Demodulation Reference Signal
  • SC-FDMA single carrier frequency division
  • OFDM Orthogonal Frequency Division Multiplexing
  • control information may include one or any combination of the following information: Modulation and coding scheme (MCS) information, New Data Indicator (NDI) information, and redundancy version (RV, Redundancy Version) Information.
  • MCS Modulation and coding scheme
  • NDI New Data Indicator
  • RV Redundancy Version
  • present invention is not limited thereto, and other control information may be included.
  • These control information is processed by, for example, encoding, scrambling, and verifying (e.g., CRC check) to form control information for D2D communication and placed on the RE closest to the DM-RS.
  • the reference signal (RS) sequence/preamble sequence may be a sounding reference signal (SRS, Sounding Reference Signal) sequence ⁇ lj, or a demodulation reference signal (DM-RS) sequence ⁇ lj, or other ZC ( Zadoff-Chu) sequence.
  • SRS Sounding Reference Signal
  • DM-RS demodulation reference signal
  • the subcarrier spacing is twice the subcarrier spacing of the normal SRS or DM-RS
  • the length is a sequence of half the length of the normal SRS or DM-RS.
  • the present invention is not limited thereto, and a specific reference signal sequence/leader sequence can be determined according to actual conditions. For the sake of simplicity, the following only uses the RS sequence as an example.
  • the base station side may pre-allocate some fixed time-frequency resources as D2D communication resources for the D2D user equipment. For example, a resource block (RB, Resource Block) with a period of 10ms or 100ms and a size of 6, 12 or the entire uplink bandwidth is used as a D2D communication resource pool.
  • the base station side can notify the D2D user equipment of the specific resource pool information by using RRC (Radio Resource Control) signaling or system information.
  • RRC Radio Resource Control
  • the D2D transmitting user equipment may receive resource pool allocation information sent by the base station side, or use pre-defined resource pool information in advance (for example, if there is no base station coverage). Then, according to the size of the data to be sent, select the appropriate control information (such as MCS, NDI and RV) and place the processed control information on the REs on both sides of the DM-RS.
  • resource pool allocation information sent by the base station side
  • pre-defined resource pool information for example, if there is no base station coverage
  • the appropriate number of RBs and locations can be selected from the resource pool.
  • An RS sequence corresponding to the selected number of RBs and location is transmitted on the first SC-FDMA/OFDM symbol. Depending on the mode of transmission, you can choose a different root sequence or the same cyclic shift. The remaining resources of each sub-frame are used to transfer data.
  • the size range of the D2D communication resources may be indicated by the length of the RS sequence.
  • the number of resources occupied by D2D communication in the current subframe is less than or equal to 4 RBs, it may be indicated by an RS sequence occupying 4 RB length.
  • 4 is a schematic diagram of dividing a subset according to the length of an RS sequence according to an embodiment of the present invention. As shown in FIG. 4, it is assumed that in each D2D subframe, a resource pool is composed of 12 Physical Resource Blocks (PRBs). The 12 PRBs can be divided into three subsets of 4 RBs, and the previous OFDM symbol of each subset is used to carry an RS sequence of 4 RB length, and the following symbols are used to transmit data.
  • PRBs Physical Resource Blocks
  • the size of the D2D communication resource can be indicated by using an RS sequence generated by a different root sequence, and the offset value of the D2D communication resource can be indicated by using a different cyclic shift (CS, Cycle Shift) value.
  • CS cyclic shift
  • a specific CS value can be used to indicate a specific RB position. For example, a CS value equal to 0 corresponds to RB0, a CS value equals 1 to RB1, a CS value equals 2 to RB2, and a CS value equals 3 to RB3.
  • the D2D user equipment selects RB1 in subset 0 as the transmission resource
  • the D2D user equipment selects the root sequence with sequence number 0 to generate the SRS sequence, and uses the SRS sequence with CS value 1 as the transmission sequence.
  • the root sequence with sequence number 1 can be selected to generate the SRS sequence, and then the specific RB position is indicated by different CS values. For example, when the D2D user equipment occupies RB2 and RB3, the root sequence with sequence number 1 can be used to generate the SRS sequence, and the SRS sequence with the CS value of 2 is used as the transmission sequence. It should be noted that when the CS value is equal to 3, the indicated resource exceeds the subsetO. At this time, the two RBs occupied by the user equipment are RB3 in the subsetO and RB0 in the subset1.
  • the root sequence with sequence number 2 can be used to generate the SRS sequence; when 4 RBs are occupied, the root sequence with sequence number 3 is used to generate the SRS sequence.
  • the root sequence with sequence number 0 is used to indicate that the resource size is 1 RB and 2 RB
  • the CS value is ⁇ 0, 1, 2, 3 ⁇ or ⁇ 0, 2, 4, 6 ⁇ to indicate the resource offset of 1 RB.
  • the CS value is ⁇ 4, 5, 6, 7 ⁇ or ⁇ 1, 3, 5, 7 ⁇ to indicate the resource offset of 2RB.
  • the root sequence numbered 1 is used to indicate that the resource size is 3 RB and 4 RB.
  • the CS value is ⁇ 0, 1, 2, 3 ⁇ or ⁇ 0, 2, 4, 6 ⁇ to indicate the resource offset of 3RB, and in the case of 4RB, since there is no resource offset, only A CS value is required and the remaining CS values can be used for other purposes. It should be noted that the above only uses SRS as an example to describe the mapping mode of resources. If other ZC sequences are used, the CS value may not be limited to 8, for example, 12 or 16, or even larger. The present invention is not limited thereto, and only a specific condition needs to be satisfied; in this case, fewer root sequences are required.
  • FIG. 5 is another schematic diagram of dividing a subset according to the length of the RS sequence according to an embodiment of the present invention. As shown in FIG. 5, subset 1 and subset 2 in FIG. 3 may be combined into a new subset 1 having a length of 8 RB.
  • 6 is another schematic diagram of dividing a subset according to the length of the RS sequence according to an embodiment of the present invention. As shown in FIG. 6, subset 0 and subset 1 in FIG. 4 may be combined into a new subset 0 having a length of 8 RB.
  • the root sequences with different sequence numbers may correspond to different resource sizes (5 RB, 6 RB, 7 RB, or 8 RB), and different CS values correspond to different resource offset positions. To avoid repetition, we will not repeat them here.
  • FIG. 7 is another schematic diagram of dividing a subset according to the length of an RS sequence according to an embodiment of the present invention. As shown in FIG. 7, when the length of the D2D resource exceeds 8 RBs and is less than 12 RBs, 3 of FIG. 4 may be used. The subsets are merged into a subset of length 12RB. The number of resources occupied by the SRS sequence at this time is 12 RBs, and the resource sizes corresponding to different root sequences are 9, 10, 11, 12 RBs.
  • the RS sequence may be sent on the RB of the corresponding length.
  • the size of the D2D communication resource may be indicated by the length of the RS sequence.
  • the number of RBs occupied by the RS sequence in the frequency domain is equal to the number of RBs allocated for D2D communication, and the first symbol of each D2D subframe is occupied in the time domain.
  • the resource pool is composed of 12 PRBs.
  • FIG. 8 is another schematic diagram of dividing a subset according to the length of an RS sequence according to an embodiment of the present invention. As shown in FIG. 8, the entire resource pool may be divided into three subsets having a length of 4 RBs. The following takes the SRS sequence as an example. Since the LTE standard specifies that the SRS sequence has a maximum of eight CS values, each subset needs two SRS root sequences to generate enough sequences to refer to Show different resource sizes and locations.
  • the SRS sequence generated by the root sequence of sequence numbers 0 and 1 may be used to correspond to the resource in subset 0, and the SRS sequence generated by the root sequence of sequence numbers 2 and 3 corresponds to the resource in subset 1, and the sequence number is 4 or 5.
  • the SRS sequence generated by the root sequence corresponds to the resources in subset 2.
  • different resource sizes and locations are indicated by using different CS values.
  • the SRS sequence generated by the root sequence of sequence number 0 corresponds to the case where the resource size is 1 RB and two RBs
  • the CS value is ⁇ 0, 1, 2, 3 ⁇ respectively occupying 1 RB
  • the corresponding RB position is ⁇ 0, 1, 2, 3 ⁇
  • the CS value is ⁇ 4, 5, 6, 7 ⁇ corresponding to the case of occupying two RBs respectively
  • the corresponding RB position is ⁇ ⁇ 0, 1 ⁇ , ⁇ 1, 2 ⁇ , ⁇ 2, 3 ⁇ , ⁇ 3, 0».
  • the SRS sequence generated by the root sequence of sequence number 1 corresponds to the case where the resource size is 3 RB and 4 RB.
  • different CS values can represent 3 RB and 4 RB and specific resource locations.
  • the SRS is used as an example to illustrate the mapping of resources. If other ZC sequences are used, the CS value may not be limited to 8, for example, 12 or 16, or even larger; only certain conditions are required to be met. In this case, fewer root sequences are needed.
  • FIG. 9 is another schematic diagram of dividing a subset according to a length of an RS sequence according to an embodiment of the present invention
  • FIG. 10 is another schematic diagram of dividing a subset according to a length of an RS sequence according to an embodiment of the present invention
  • FIG. 11 is an embodiment of the present invention.
  • Another schematic of the subset is divided according to the length of the RS sequence.
  • Figure 9 and Figure 10 show the case where D2D communication occupies more than 5 RBs and is less than or equal to 8 RBs.
  • Figure 11 shows the case where D2D communication occupies more than 8 RBs and is less than or equal to 12 RBs.
  • SRS can also be generated by using root sequences of different sequence numbers, corresponding to different resource sizes, and different CS values corresponding to different resource location offsets.
  • the above describes how the RS sequence maps D2D communication resources.
  • the following describes how to generate control information.
  • encoding may be performed using a fixed code rate when generating control information.
  • Control information can include, but is not limited to, MCS, NDI, RV, etc.
  • MCS occupies 5 bits and NDI occupies lbit, then the size of this control information is 6 bits.
  • the MCS used can be limited, so that the number of bits of the MCS can be less, such as 3bit or 4bit. Therefore, the size of the control information for each communication can be determined.
  • the 6-bit control information is taken as an example to illustrate the encoding method of the control information.
  • the 6-bit control information can be used in the existing LTE standard (20, A) or (32, A) of Reid Muller (RM, eed- Muller)
  • the coder, coded into 20-bit or 32-bit, 32-bit codeword can reduce some information bits into 24 bits, where A is the actual number of information bits.
  • the information bit processing flow will be described below in a 20-bit encoding manner.
  • FIG. 12 is a flowchart of processing of control information according to an embodiment of the present invention.
  • information bits may be first encoded by an RM encoder to obtain 20 bits, and the encoded information is scrambled and then modulated into 10 QPSK symbols. , mapped to the REs on both sides of the DM-RS symbol. A minimum of 10 REs are required for 10 OFDM symbols, and there are many possible mapping methods.
  • Figure 13 is a diagram showing a control channel according to an embodiment of the present invention. As shown in Figure 13, control information can be mapped to any one of the two sides of any one of the DM-RSs.
  • Fig. 14 is another schematic diagram of the control channel according to the embodiment of the present invention. As shown in Fig. 14, the control information may be mapped to two symbols on either side of any one of the DM-RSs.
  • the present invention is not limited thereto, and it is of course possible to simultaneously map the symbols on both sides of the two DM-RSs.
  • the encoder code rate is also fixed. Therefore, the number of REs occupied by the control information is also fixed. As long as the location of the control information is specified in advance, the user equipment at the D2D receiving end can This control information is easy to obtain.
  • redundancy may be further introduced for the control information.
  • the encoded 20 bits are copied once to form 40 bits, and modulated into 20 QPSK symbols; these 20 symbols are respectively transmitted in two slots.
  • control information may be mapped to any one of two sides of two DM-RSs.
  • 16 is another schematic diagram of a control channel according to an embodiment of the present invention. As shown in FIG. 16, control information may also be mapped in two symbols on both sides of two DM-RSs.
  • encoding when the control information is generated, encoding may be performed using different code rates based on the signal quality information.
  • the channel environment may change at any time.
  • different channel coding rate can be provided for the control information.
  • the D2D transmitting user equipment can classify the channel quality into three levels: low, medium, and high according to channel conditions.
  • the control information may be encoded by using different code rates respectively.
  • the channel quality is poor, the channel coding with the lowest code rate is selected, and the channel coding gain is improved for the information bits, thereby improving the transmission reliability.
  • FIG. 17 is another processing flowchart of the control information according to the embodiment of the present invention.
  • a CRC check may be added to the control information.
  • an 8-bit or 12-bit CRC check can be used.
  • the resulting CRC bits are then scrambled by, for example, D2D-RNTI information, and the scrambled CRC bits are added after the control information.
  • the control information including the CRC bits is encoded by a convolutional code encoder of, for example, a 1/3 code rate; for the encoded bits, rate matching is performed according to the quality of the channel, and three control messages of different sizes are obtained.
  • the obtained control information is QPSK modulated, and the obtained QPSK symbols are mapped to the symbols closest to both sides of the DM-RS.
  • the D2D receiving user equipment demodulates the control information, the three possible combinations of blind detection are required.
  • FIG. 18 is another schematic diagram of a control channel according to an embodiment of the present invention
  • FIG. 19 is another schematic diagram of a control channel according to an embodiment of the present invention
  • FIG. 20 is another schematic diagram of a control channel according to an embodiment of the present invention. 18 corresponds to the case where the channel quality is high
  • FIG. 19 corresponds to the case of the channel quality
  • FIG. 20 corresponds to the case where the channel quality is poor.
  • the D2D receiving user equipment can obtain the D2D communication resource location according to the reference signal sequence/preamble sequence by using the control channel including the reference signal sequence/preamble sequence and the control information, and obtain the D2D communication according to the D2D communication resource location. Control information.
  • the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced.
  • the embodiment of the present invention provides a method for transmitting control information in D2D communication, which is described from a D2D user equipment (a second user equipment, which may also be referred to as a D2D receiving user equipment) on the receiving side.
  • a D2D user equipment a second user equipment, which may also be referred to as a D2D receiving user equipment
  • the same contents as those in Embodiment 1 will not be described again.
  • FIG. 21 is a flowchart of a method for transmitting control information in D2D communication according to an embodiment of the present invention. As shown in FIG. 21, the transmission method includes:
  • Step 2101 The second user equipment receives a control signal for D2D communication, where the control channel that sends the control signal includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource;
  • Step 2102 The second user equipment detects the reference signal sequence or the preamble sequence to obtain a D2D communication resource location, and obtains control information for D2D communication according to the D2D communication resource location.
  • the D2D receiving user equipment may receive the resource pool allocation information sent by the base station side, or use the resource pool information predefined in advance.
  • the D2D receiving user equipment may detect that there is a possible RS sequence or a preamble sequence in the resource pool; and determine a time-frequency location of the data to be received according to the detected RS sequence or the preamble sequence.
  • the REs on both sides of the DM-RS are detected to detect the control message and demodulate the control message, and then the final D2D is demodulated by using information such as MCS, NDI, RV in the control information. data.
  • control information for D2D communication may be configured on one or more REs close to the DM-RS; and the RS sequence or the preamble sequence may be configured in the first SC-FDMA or OFDM of the subframe On the symbol.
  • the size or size range of the D2D communication resource may be indicated by the length of the RS sequence or the preamble sequence. Furthermore, the size of the D2D communication resource can be indicated by using an RS sequence or a preamble sequence generated by different root sequences, and the offset value of the D2D communication resource can be indicated by using a different CS value.
  • the D2D receiving user equipment can detect the D2D by using the RS sequence or the preamble sequence of different CS values generated by different lengths and different sequence numbers to receive the RS sequence or the preamble sequence. Send a specific RS sequence or preamble sequence sent by the user equipment to obtain the corresponding resource location.
  • the D2D receiving user equipment demodulates all possible RS sequences or preamble sequences, the complexity may be large. Therefore, it is necessary to distinguish the RS sequence or the preamble sequence that the D2D user equipment needs to detect to reduce the receiving side D2D user. The complexity of the device.
  • the search space formed by the RS sequence or the preamble sequence of different lengths may be divided into a common search space (CSS, Common Search Space) and a user search space (USS, UE specific search space); the common search space may be detected.
  • CSS Common Search Space
  • USS UE specific search space
  • the search space, the aggregation level, and the candidate concept of the PDCCH in the LTE network may be borrowed. All S sequences or preamble sequences that need to be detected by the D2D user equipment are called search spaces, and RS sequences or preamble sequences of different lengths can be regarded as different degrees of aggregation. For example, an RS sequence of length 4 RB, 8 B, 12 RB... can be regarded as a degree of aggregation of 4, 8, 12...
  • the search space formed by all RS sequences or preamble sequences of different lengths is divided into a common search space and a user search space, and the common search space corresponds to an RS sequence or a preamble sequence of a specific sequence number and/or a specific CS value at each aggregation level, and the user searches.
  • the space corresponds to an RS sequence or a preamble sequence of a specific sequence number and/or a specific CS value between pairs of D2D communication.
  • the sequence in the CSS is used to indicate the location of the resource for transmitting the broadcast information, and can be used for D2D broadcast communication or multicast communication.
  • the sequence in the USS is used to indicate the location of the transmission resource between the D2D user equipment pair, and can be used for the D2D single. Broadcast communication. D2D user setting on each receiving side It is necessary to detect both CSS and uss.
  • control channel including a reference signal sequence/preamble sequence and control information
  • the D2D receiving user equipment can obtain the D2D communication resource location according to the reference signal sequence/preamble sequence, and obtain control information for D2D communication according to the D2D communication resource location. Thereby, the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced.
  • Example 3
  • the embodiment of the invention provides a transmission device for controlling information in D2D communication, and the transmission device can be configured into a D2D transmission user equipment.
  • This embodiment corresponds to the method for transmitting control information in the D2D communication described in Embodiment 1, and the same content is not described herein again.
  • FIG. 22 is a schematic diagram of a configuration of a control device for transmitting information in 2D communication according to an embodiment of the present invention.
  • the transmission device 2200 includes: a channel configuration unit 2201 and an information sending unit 2202; wherein, the channel configuration unit 2201 And a control channel for configuring D2D communication, where the control channel includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource; and the information sending unit 2202 transmits the D2D through the control channel. Control information for communication and reference signal sequence/leader sequence.
  • control information for D2D communication may be configured on one or more resource particles close to the demodulation reference signal; and the reference signal sequence or preamble sequence is configured in the first SC- of the subframe.
  • the reference signal sequence or preamble sequence is configured in the first SC- of the subframe.
  • the transmission device 2200 may further include: a resource selection unit 2203, selecting a D2D communication resource in a resource pool configured on the base station side or in a preset resource pool.
  • the transmission device 2200 may further include: a sequence generating unit 2204, generating the reference signal sequence or a preamble sequence; wherein a size or a size range of the D2D communication resource is indicated by the length of the reference signal sequence or the preamble sequence. Furthermore, it is also possible to indicate the size of the D2D communication resource by using a reference signal sequence or a preamble sequence generated by different root sequences, and to indicate an offset value of the D2D communication resource by using a different cyclic shift value.
  • the reference signal sequence or the preamble sequence may be a sounding reference signal sequence, or a demodulated reference signal sequence, or other ZC sequence.
  • the present invention is not limited thereto, and a specific sequence can be determined according to actual conditions.
  • the transmission device 2200 may further include: an information generating unit 2205 that generates control information for D2D communication.
  • the control information may include one or a combination of the following information: modulation coding scheme information, new data indication information, and redundancy version information.
  • the present invention is not limited thereto, and specific control information may be determined according to actual conditions.
  • the information generating unit 2205 may perform encoding using a fixed code rate or encode using different code rates based on the signal quality information.
  • the channel configuration unit 2201 may be further configured to map control information for D2D communication to one or more resource particles of symbols on both sides of the demodulation reference signal, or demodulate one or more resource particles of symbols on either side of the reference signal. on.
  • the embodiment of the present invention further provides a user equipment, which includes the transmission device for controlling information in D2D communication as described above.
  • FIG. 23 is a schematic block diagram showing the system configuration of the user equipment 2300 according to the embodiment of the present invention.
  • the user equipment 2300 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100.
  • the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
  • the functionality of the transmission means for controlling information in D2D communication can be integrated into the central processor 100.
  • the central processing unit 100 may be configured to implement the transmission method of the control information in the D2D communication as described in Embodiment 1.
  • the transmission information of the control information in the D2D communication may be configured separately from the central processing unit 100, for example, the transmission device of the control information in the D2D communication may be configured as a chip connected to the central processing unit 100, through the central processing unit. Control to implement the function of the transmission device for controlling information in D2D communication.
  • the user equipment 2300 may further include: a communication module 110, an input unit 120, an audio processing unit 130, a display 160, and a power supply 170. It should be noted that the user equipment 2300 does not necessarily have to include all of the components shown in FIG. 23; in addition, the user equipment 2300 may also include components not shown in FIG. 23, and reference may be made to the prior art.
  • central processor 100 also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls each of user devices 2300. The operation of the part.
  • the memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. Can store the above-mentioned letter related to failure In addition, a program for executing related information can be stored. And the central processing unit 100 can execute the program stored by the memory 140 to implement information storage or processing and the like. The functions of other components are similar to those of the existing ones and will not be described here.
  • the various components of user device 2300 may be implemented by special purpose hardware, firmware, software, or a combination thereof without departing from the scope of the invention.
  • control channel including a reference signal sequence/preamble sequence and control information
  • the D2D receiving side may obtain the D2D communication resource location according to the reference signal sequence/preamble sequence, and obtain control information for D2D communication according to the D2D communication resource location. Thereby, the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced.
  • Example 4
  • Embodiments of the present invention provide a device for transmitting control information in D2D communication, and the transmission device can be configured into a D2D receiving user equipment.
  • This embodiment corresponds to the method for transmitting control information in D2D communication according to Embodiment 2, and the same content will not be described again.
  • Figure 24 is a block diagram showing a structure of a control device for transmitting information in D2D communication according to an embodiment of the present invention.
  • the transmission device 2400 includes: an information receiving unit 2401 and an information detecting unit 2402;
  • the information receiving unit 2401 receives a control signal for D2D communication, where the control channel for transmitting the control signal includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource; the information detecting unit 2402 The reference signal sequence or preamble sequence is detected to obtain a D2D communication resource location, and control information for D2D communication is obtained based on the D2D communication resource location.
  • control information for D2D communication may be configured on one or more resource particles close to the demodulation reference signal; and the reference signal sequence or preamble sequence is configured in the first SC-FDMA of the subframe Or on an OFDM symbol.
  • the size or size range of the D2D communication resources may be indicated by the length of the reference signal sequence or the preamble sequence. Furthermore, the size of the D2D communication resource can be indicated by using a reference signal sequence or a preamble sequence generated by different root sequences, and the offset value of the D2D communication resource can be indicated by using a different cyclic shift value.
  • the search space formed by the reference signal sequence or the preamble sequence of different lengths may be divided into a common search space and a user search space; the information detecting unit 2402 detects the common search space to obtain a D2D broadcast or multicast communication. Resource location, and detecting user search space for D2D unicast communication Resource location.
  • the embodiment of the present invention further provides a user equipment, which includes the transmission device for controlling information in D2D communication as described above.
  • the user equipment can be constructed with reference to FIG. 23, and can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100.
  • the functionality of the transmission means for controlling information in D2D communication can be integrated into the central processor 100.
  • the central processing unit 100 can be configured to implement the transmission method of the control information in the D2D communication as described in Embodiment 2.
  • the transmission information of the control information in the D2D communication may be configured separately from the central processing unit 100, for example, the transmission device of the control information in the D2D communication may be configured as a chip connected to the central processing unit 100, through the central processing unit. Control to implement the function of the transmission device for controlling information in D2D communication.
  • the D2D receiving side can obtain the D2D communication resource location according to the reference signal sequence/preamble sequence by using the control channel including the reference signal sequence/preamble sequence and the control information, and obtain the D2D communication for the D2D communication according to the D2D communication resource location. Control information.
  • the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced.
  • the embodiment of the present invention further provides a communication system, which includes the user equipment as described in Embodiment 3 and the user equipment described in Embodiment 4; the same contents as Embodiments 1 to 4 are not described herein.
  • the communication system 2500 includes: a first user equipment 2501 and a second user equipment 2502;
  • the first user equipment 2501 configures a control channel for D2D communication, where the control channel includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource; and is transmitted through the control channel for D2D Control information for communication and reference signal sequence/preamble sequence;
  • the second user equipment 2502 receives the control signal for D2D communication, detects the reference signal sequence/preamble to obtain the D2D communication resource location, and obtains control information for D2D communication based on the D2D communication resource location.
  • the first user equipment and the second user equipment are a pair of user equipments that perform D2D communication.
  • the first user equipment and the second user equipment may be under the coverage of the base station or may not be covered by the base station.
  • the present invention is not limited to this, and FIG. 25 is described by taking an example in which the user equipment is under the coverage of the base station.
  • the communication system 2500 may further include: a base station 2503 configured to allocate a resource pool for D2D communication.
  • control information for D2D communication is configured on one or more resource particles close to the demodulation reference signal; and the reference signal sequence or preamble sequence is configured in the first SC-FDMA of the subframe or On the OFDM symbol.
  • the size or size range of the D2D communication resources may be indicated by the length of the reference signal sequence or the preamble sequence. Furthermore, the size of the D2D communication resource can be indicated by using a reference signal sequence or a preamble sequence generated by different root sequences, and the offset value of the D2D communication resource can be indicated by using a different cyclic shift value.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes the computer to execute the D2D communication in the user equipment as described in Embodiment 1 or 2 above. Control method of transmission of information.
  • An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute a method for transmitting control information in D2D communication as described in Embodiment 1 or 2 above in a user equipment .
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

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Abstract

Embodiments of the present invention provide a control information transmission method in D2D communication, an apparatus and a communication system, wherein the transmission method comprises: configuring a control channel used for the D2D communication, wherein the control channel comprises control information used for the D2D communication and a reference signal sequence or a preamble sequence that indicates a D2D communication resource location; and sending the control information used for the D2D communication and the reference signal sequence or the preamble sequence through the control channel. Through the embodiments of the present invention, demodulation complexity of a receiver in the D2D communication can be decreased, a cache required during demodulation can be reduced, and a resource waste due to resource collision can be diminished.

Description

D2D通信中控制信息的传输方法、 装置以及通信*** 技术领域  Method, device and communication system for transmitting control information in D2D communication
本发明涉及一种通信领域， 特别涉及一种设备到设备 （D2D， Device to Device) 通信中控制信息的传输方法、 装置以及通信***。 背景技术  The present invention relates to the field of communications, and in particular, to a method, a device, and a communication system for transmitting control information in device-to-device (D2D) communication. Background technique
长期演进*** （ LTE， Long Term Evolution) el.12中引入了 D2D通信， 用户设 备 （UE) 之间可以完全或者部分地不通过 LTE基站 （eNB) 而直接通信。 这种通信 方式可用于公众安全 (public safety ) 紧急通信 ( emergency communication) 等广播 通信， 也可用于多个用户设备之间的组播通信以及两个用户设备之间的点对点通信。  D2D communication is introduced in the LTE (Long Term Evolution) el.12, and the user equipment (UE) can communicate directly or partially without passing through the LTE base station (eNB). This communication method can be used for broadcast communication such as public safety emergency communication, as well as for multicast communication between multiple user equipments and point-to-point communication between two user equipments.
为了支持这种通信方式， LTE***需要解决一些问题， 比如： 同步、 信号调制方 式（例如是 OFDM还是 SC-FDMA)、 资源分配（例如上行资源还是下行资源）、 功率 控制以及控制信息传输等问题。  In order to support this communication method, the LTE system needs to solve some problems, such as: synchronization, signal modulation (such as OFDM or SC-FDMA), resource allocation (such as uplink resources or downlink resources), power control, and control information transmission. .
在 LTE ***中， 为下行链路和上行链路分别设计了专用的控制信道： 物理下行 控制信道 （PDCCH , Physical Downlink Control Channel ) 和物理上行控制信道 ( PUCCH, Physical Uplink Control Channel)。  In the LTE system, dedicated control channels are designed for the downlink and uplink: Physical downlink control channel (PDCCH, Physical Downlink Control Channel) and Physical Uplink Control Channel (PUCCH).
PDCCH在时域上占据每个 LTE子帧的前 1至 3个 OFDM符号， 在频域上占据 整个***带宽。 通过基站的统一调度， 多个用户设备的控制信息可以彼此正交地在 PDCCH上传输。 但是每个用户设备的控制信道是散布在整个***带宽上， 占据的时 频资源也是非连续的， 用户设备盲检整个控制区域以找到对应的控制信息。  The PDCCH occupies the first 1 to 3 OFDM symbols of each LTE subframe in the time domain and occupies the entire system bandwidth in the frequency domain. Through unified scheduling of the base stations, control information of multiple user equipments may be transmitted on the PDCCH orthogonally to each other. However, the control channel of each user equipment is spread over the entire system bandwidth, and the occupied time-frequency resources are also discontinuous. The user equipment blindly checks the entire control area to find corresponding control information.
PUCCH则是由上行物理资源边缘的 1个或者多个资源块对 （RB pair) 构成， 用 户设备在 PUCCH传输信道质量指示 （CQI， Channel Quality Indicator) /预编码矩阵 指示（PMI， Precoding Matrix Indicator),混合自动重传请求（HARQ， Hybrid Automatic Repeat reQuest) 的 ACK/NACK信息和调度请求 （SR， Scheduling Request) 信息。  The PUCCH is composed of one or more resource block pairs (RB pairs) at the edge of the uplink physical resource, and the user equipment transmits a Channel Quality Indicator (CQI)/Precoding Matrix Indicator (PMI) in the PUCCH. ACK/NACK information and scheduling request (SR, Scheduling Request) information of the hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat reQuest).
应该注意， 上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、 完整的说明， 并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发 明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。  It should be noted that the above description of the technical background is only for the purpose of facilitating the clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these solutions are set forth in the background section of the present invention.
发明内容 但是，对于采用上行资源作为传输资源的 D2D通信***来说，不存在类似 PUCCH 的信道。 在现有的 LTE通信***中， D2D接收用户设备无法准确知道发送资源的时 频位置， 需要每个子帧每个资源块 （RB) 地进行检测， 这会使得接收机的解调复杂 度很高。 Summary of the invention However, for a D2D communication system employing an uplink resource as a transmission resource, there is no PUCCH-like channel. In the existing LTE communication system, the D2D receiving user equipment cannot accurately know the time-frequency position of the transmission resource, and needs to detect each resource block (RB) in each subframe, which makes the demodulation complexity of the receiver high. .
本发明实施例提供一种 D2D通信中控制信息的传输方法、 装置以及通信***。 通过包含参考信号序列 /前导序列和控制信息的控制信道， 解决 D2D通信***中如何 传输控制信息的问题。  Embodiments of the present invention provide a method, an apparatus, and a communication system for transmitting control information in D2D communication. The problem of how to transmit control information in a D2D communication system is solved by a control channel including a reference signal sequence/preamble sequence and control information.
根据本发明实施例的第一个方面， 提供一种 D2D通信中控制信息的传输方法， 所述传输方法包括：  According to a first aspect of the embodiments of the present invention, a method for transmitting control information in D2D communication is provided, where the transmission method includes:
配置用于 D2D通信的控制信道，所述控制信道中包括用于 D2D通信的控制信息 以及指示 D2D通信资源位置的参考信号序列或前导序列；  Configuring a control channel for D2D communication, the control channel including control information for D2D communication and a reference signal sequence or preamble sequence indicating a location of the D2D communication resource;
通过所述控制信道发送所述用于 D2D通信的控制信息以及所述参考信号序列或 前导序列。  The control information for D2D communication and the reference signal sequence or preamble sequence are transmitted over the control channel.
根据本发明实施例的第二个方面， 提供一种 D2D通信中控制信息的传输方法， 所述传输方法包括：  According to a second aspect of the embodiments of the present invention, a method for transmitting control information in D2D communication is provided, where the transmission method includes:
接收用于 D2D通信的控制信号， 发送所述控制信号的控制信道中包括用于 D2D 通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导序列；  Receiving a control signal for D2D communication, the control channel transmitting the control signal includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource;
检测所述参考信号序列或前导序列以获得所述 D2D通信资源位置， 并根据所述 D2D通信资源位置获得所述用于 D2D通信的控制信息。  Detecting the reference signal sequence or preamble sequence to obtain the D2D communication resource location, and obtaining the control information for D2D communication according to the D2D communication resource location.
根据本发明实施例的第三个方面， 提供一种 D2D通信中控制信息的传输装置， 所述传输装置包括：  According to a third aspect of the embodiments of the present invention, a device for transmitting control information in D2D communication is provided, where the transmission device includes:
信道配置单元， 配置用于 D2D通信的控制信道， 所述控制信道中包括用于 D2D 通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导序列；  a channel configuration unit, configured to control a channel for D2D communication, where the control channel includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource;
信息发送单元， 通过所述控制信道发送所述用于 D2D通信的控制信息以及所述 参考信号序列或前导序列。  And an information transmitting unit that transmits the control information for D2D communication and the reference signal sequence or preamble sequence through the control channel.
根据本发明实施例的第四个方面， 提供一种 D2D通信中控制信息的传输装置， 所述传输装置包括：  According to a fourth aspect of the present invention, a device for transmitting control information in D2D communication is provided, where the transmission device includes:
信息接收单元， 接收用于 D2D通信的控制信号， 发送所述控制信号的控制信道 中包括用于 D2D通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导 序列； An information receiving unit, configured to receive a control signal for D2D communication, where the control channel for transmitting the control signal includes control information for D2D communication and a reference signal sequence or preamble indicating a location of the D2D communication resource Sequence
信息检测单元， 检测所述参考信号序列或前导序列以获得所述 D2D通信资源位 置， 并根据所述 D2D通信资源位置获得所述用于 D2D通信的控制信息。  The information detecting unit detects the reference signal sequence or the preamble sequence to obtain the D2D communication resource location, and obtains the control information for D2D communication according to the D2D communication resource location.
根据本发明实施例的第五个方面， 提供一种通信***， 所述通信***包括： 第一用户设备， 配置用于 D2D通信的控制信道， 所述控制信道中包括用于 D2D 通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导序列； 以及通过 所述控制信道发送所述用于 D2D 通信的控制信息以及所述参考信号序列或前导序 列；  According to a fifth aspect of the embodiments of the present invention, a communication system is provided, the communication system includes: a first user equipment, configured with a control channel for D2D communication, where the control channel includes control information for D2D communication And a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource; and transmitting, by the control channel, the control information for D2D communication and the reference signal sequence or preamble sequence;
第二用户设备， 接收用于 D2D通信的控制信号， 检测所述参考信号序列或前导 序列以获得所述 D2D通信资源位置， 并根据所述 D2D通信资源位置获得所述用于 D2D通信的控制信息。  a second user equipment, receiving a control signal for D2D communication, detecting the reference signal sequence or a preamble sequence to obtain the D2D communication resource location, and obtaining the control information for D2D communication according to the D2D communication resource location .
根据本发明实施例的又一个方面， 提供一种计算机可读程序， 其中当在用户设备 中执行所述程序时， 所述程序使得计算机在所述用户设备中执行如上所述的 D2D通 信中控制信息的传输方法。  According to still another aspect of the embodiments of the present invention, a computer readable program is provided, wherein when the program is executed in a user equipment, the program causes a computer to perform control in D2D communication as described above in the user equipment The method of transmitting information.
根据本发明实施例的又一个方面， 提供一种存储有计算机可读程序的存储介质， 其中所述计算机可读程序使得计算机在用户设备中执行如上所述的 D2D通信中控制 信息的传输方法。  According to still another aspect of an embodiment of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute a transmission method of control information in D2D communication as described above in a user equipment.
本发明实施例的有益效果在于， 通过采用包含参考信号序列 /前导序列和控制信 息的控制信道， D2D接收用户设备可以根据参考信号序列 /前导序列获得 D2D通信资 源位置， 并根据 D2D通信资源位置获得用于 D2D通信的控制信息。 由此， 可以降低 D2D 通信中接收机的解调复杂度， 减小解调时需要的缓存， 并且减少由于资源碰撞 而造成的资源浪费。  An advantageous effect of the embodiment of the present invention is that, by using a control channel including a reference signal sequence/preamble sequence and control information, the D2D receiving user equipment can obtain a D2D communication resource location according to the reference signal sequence/preamble sequence, and obtain the D2D communication resource location according to the D2D communication resource location. Control information for D2D communication. Thereby, the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced.
参照后文的说明和附图， 详细公开了本发明的特定实施方式， 指明了本发明的原 理可以被采用的方式。 应该理解， 本发明的实施方式在范围上并不因而受到限制。 在 所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。  Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, which illustrate the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the spirit and scope of the appended claims.
针对一种实施方式描述和 /或示出的特征可以以相同或类似的方式在一个或更多 个其它实施方式中使用， 与其它实施方式中的特征相组合， 或替代其它实施方式中的 特征。  Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or in place of, features in other embodiments. .
应该强调， 术语 "包括 /包含"在本文使用时指特征、 整件、 步骤或组件的存在， 但并不排除一个或更多个其它特征、 整件、 步骤或组件的存在或附加。 附图说明 It should be emphasized that the term "include/comprise" as used herein refers to the presence of a feature, component, step or component, The existence or addition of one or more other features, components, steps or components are not excluded. DRAWINGS
参照以下的附图可以更好地理解本发明的很多方面。 附图中的部件不是成比例 绘制的， 而只是为了示出本发明的原理。 为了便于示出和描述本发明的一些部分， 附 图中对应部分可能被放大或缩小。  Many aspects of the invention can be better understood with reference to the following drawings. The components in the figures are not drawn to scale, but only to illustrate the principles of the invention. In order to facilitate the illustration and description of some parts of the invention, the corresponding parts in the drawings may be enlarged or reduced.
在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个 其它附图或实施方式中示出的元素和特征相结合。 此外， 在附图中， 类似的标号表示 几个附图中对应的部件， 并可用于指示多于一种实施方式中使用的对应部件。  The elements and features described in one of the figures or one embodiment of the invention may be combined with elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the
图 1是本发明实施例 1的 D2D通信中控制信息的传输方法的一流程图； 图 2是本发明实施例 1在常规 CP子帧下的 D2D控制信道的一示意图； 图 3是本发明实施例 1在扩展 CP子帧下的 D2D控制信道的一示意图； 图 4是本发明实施例 1的根据 RS序列的长度划分子集的一示意图； 图 5是本发明实施例 1的根据 RS序列的长度划分子集的另一示意图； 图 6是本发明实施例 1的根据 RS序列的长度划分子集的另一示意图； 图 7是本发明实施例 1的根据 RS序列的长度划分子集的另一示意图； 图 8是本发明实施例 1的根据 RS序列的长度划分子集的另一示意图； 图 9是本发明实施例 1的根据 RS序列的长度划分子集的另一示意图； 图 10是本发明实施例 1的根据 RS序列的长度划分子集的另一示意图； 图 11是本发明实施例 1的根据 RS序列的长度划分子集的另一示意图； 图 12是本发明实施例 1的控制信息的一处理流程图；  1 is a flowchart of a method for transmitting control information in D2D communication according to Embodiment 1 of the present invention; FIG. 2 is a schematic diagram of a D2D control channel in a conventional CP subframe according to Embodiment 1 of the present invention; 1 is a schematic diagram of a D2D control channel in an extended CP subframe; FIG. 4 is a schematic diagram of a subset according to a length of an RS sequence according to Embodiment 1 of the present invention; FIG. 5 is a sequence according to an RS sequence according to Embodiment 1 of the present invention; FIG. 6 is another schematic diagram of dividing a subset according to the length of the RS sequence according to Embodiment 1 of the present invention; FIG. 7 is another embodiment of dividing the subset according to the length of the RS sequence according to Embodiment 1 of the present invention; FIG. 8 is another schematic diagram of dividing a subset according to the length of the RS sequence according to Embodiment 1 of the present invention; FIG. 9 is another schematic diagram of dividing the subset according to the length of the RS sequence according to Embodiment 1 of the present invention; Another schematic diagram of dividing a subset according to the length of the RS sequence according to Embodiment 1 of the present invention; FIG. 11 is another schematic diagram of dividing the subset according to the length of the RS sequence according to Embodiment 1 of the present invention; FIG. 12 is an implementation of the present invention. 1 is a process flowchart of the control information;
图 13是本发明实施例 1的控制信道的另一示意图；  Figure 13 is another schematic diagram of a control channel according to Embodiment 1 of the present invention;
图 14是本发明实施例 1的控制信道的另一示意图；  14 is another schematic diagram of a control channel according to Embodiment 1 of the present invention;
图 15是本发明实施例 1的控制信道的另一示意图；  Figure 15 is another schematic diagram of a control channel according to Embodiment 1 of the present invention;
图 16是本发明实施例 1的控制信道的另一示意图；  16 is another schematic diagram of a control channel according to Embodiment 1 of the present invention;
图 17是本发明实施例 1的控制信息的另一处理流程图；  Figure 17 is a flowchart showing another process of control information according to Embodiment 1 of the present invention;
图 18是本发明实施例 1的控制信道的另一示意图；  18 is another schematic diagram of a control channel according to Embodiment 1 of the present invention;
图 19是本发明实施例 1的控制信道的另一示意图；  Figure 19 is another schematic diagram of a control channel according to Embodiment 1 of the present invention;
图 20是本发明实施例 1的控制信道的另一示意图； 图 21是本发明实施例 2的 D2D通信中控制信息的传输方法的一流程图； 图 22是本发明实施例 3的 2D通信中控制信息的传输装置的一构成示意图； 图 23是本发明实施例 3的用户设备的***构成的一示意框图； 20 is another schematic diagram of a control channel according to Embodiment 1 of the present invention; Figure 21 is a flowchart of a method for transmitting control information in D2D communication according to Embodiment 2 of the present invention; Figure 22 is a block diagram showing a configuration of a device for transmitting control information in 2D communication according to Embodiment 3 of the present invention; A schematic block diagram of the system configuration of the user equipment of Example 3;
图 24是本发明实施例 4的 2D通信中控制信息的传输装置的一构成示意图； 图 25是本发明实施例 5的通信***的一构成示意图。  Figure 24 is a block diagram showing a configuration of a control device for transmitting information in 2D communication according to a fourth embodiment of the present invention; and Figure 25 is a block diagram showing a configuration of a communication system according to a fifth embodiment of the present invention.
具体实施方式 detailed description
参照附图， 通过下面的说明书， 本发明的前述以及其它特征将变得明显。在说明 书和附图中， 具体公开了本发明的特定实施方式， 其表明了其中可以采用本发明的原 则的部分实施方式， 应了解的是， 本发明不限于所描述的实施方式， 相反， 本发明包 括落入所附权利要求的范围内的全部修改、 变型以及等同物。  The foregoing and other features of the invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiments of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.
实施例 1  Example 1
本发明实施例提供一种 D2D通信中控制信息的传输方法， 从发送侧的 D2D用户 设备 （第一用户设备， 也可称为 D2D发送用户设备） 进行说明。  The embodiment of the present invention provides a method for transmitting control information in D2D communication, which is described from a D2D user equipment (a first user equipment, which may also be referred to as a D2D transmission user equipment) on the transmitting side.
图 1是本发明实施例的 D2D通信中控制信息的传输方法的一流程图， 如图 1所 示， 所述传输方法包括：  1 is a flowchart of a method for transmitting control information in D2D communication according to an embodiment of the present invention. As shown in FIG. 1, the transmission method includes:
步骤 101， 第一用户设备配置用于 D2D通信的控制信道， 所述控制信道中包括 用于 D2D通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导序列； 步骤 102， 第一用户设备通过该控制信道向第二用户设备发送用于 D2D通信的 控制信息以及参考信号序列或前导序列。  Step 101: The first user equipment configures a control channel for D2D communication, where the control channel includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource. Step 102: The first user equipment Control information for D2D communication and a reference signal sequence or preamble sequence are transmitted to the second user equipment over the control channel.
在本实施例中，第一用户设备和第二用户设备为一对进行 D2D通信的用户设备。 第一用户设备和第二用户设备可以处于基站覆盖之下， 也可以没有被基站覆盖。本发 明不限于此。  In this embodiment, the first user equipment and the second user equipment are a pair of user equipments that perform D2D communication. The first user equipment and the second user equipment may or may not be covered by the base station. The present invention is not limited to this.
图 2是本发明实施例在常规循环前缀（CP， Cyclic Prefix)子帧下的 D2D控制信 道的一示意图， 图 3是本发明实施例在扩展 CP子帧下的 D2D控制信道的一示意图。 为避免重复， 以下都以常规 CP子帧为例来进行说明， 但本发明不限于此， 所述方法 也适用于扩展 CP的情况。  2 is a schematic diagram of a D2D control channel in a normal cyclic prefix (CP) sub-frame according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a D2D control channel in an extended CP subframe according to an embodiment of the present invention. In order to avoid repetition, the following description will be made by taking a conventional CP subframe as an example, but the present invention is not limited thereto, and the method is also applicable to the case of expanding the CP.
如图 2所示，用于 D2D通信的控制信息可以被配置在靠近解调参考信号 (DM-RS, Demodulation Reference Signal) 的一个或多个资源粒子 (RE, Resource Element)上； 以及该参考信号序列 /前导序列被配置在子帧的第一个单载波频分（SC-FDMA, Single Carrier Frequency Division) 符号或正交步 j¾分复用 ( OFDM , Orthogonal Frequency Division Multiplexing ) 符号上。 As shown in FIG. 2, the control information for D2D communication may be configured on one or more resource elements (RE, Resource Element) close to a Demodulation Reference Signal (DM-RS); And the reference signal sequence/preamble sequence is configured on a first single carrier frequency division (SC-FDMA) symbol or an orthogonal step OFDM (Orthogonal Frequency Division Multiplexing) symbol of the subframe. .
在本实施例中， 控制信息可以包括如下信息的一种或任意组合： 调制编码方案 (MCS, Modulation and coding Scheme)信息、新数据指示 (NDI, New Data Indicator) 信息和冗余版本 （RV， Redundancy Version) 信息。 但本发明不限于此， 还可以包括 其他的控制信息。 这些控制信息经过例如编码、 加扰及校验 （例如 CRC校验） 等方 式处理之后形成用于 D2D通信的控制信息， 并被放在最靠近 DM-RS的 RE上。  In this embodiment, the control information may include one or any combination of the following information: Modulation and coding scheme (MCS) information, New Data Indicator (NDI) information, and redundancy version (RV, Redundancy Version) Information. However, the present invention is not limited thereto, and other control information may be included. These control information is processed by, for example, encoding, scrambling, and verifying (e.g., CRC check) to form control information for D2D communication and placed on the RE closest to the DM-RS.
在本实施例中，参考信号（RS)序列 /前导序列可以为探测参考信号（SRS， Sounding Reference Signal)序歹 lj，或者解调参考信号（DM-RS)序歹 lj，或者其他的 ZC(Zadoff-Chu) 序列。 例如， 子载波间隔是正常 SRS或 DM-RS的子载波间隔的 2倍， 长度是正常 SRS或 DM-RS的长度的一半的序列。 但本发明不限于此， 可以根据实际情况确定具 体的参考信号序列 /前导序列。 为简单起见， 以下仅以 RS序列为例进行说明。  In this embodiment, the reference signal (RS) sequence/preamble sequence may be a sounding reference signal (SRS, Sounding Reference Signal) sequence 歹lj, or a demodulation reference signal (DM-RS) sequence 歹lj, or other ZC ( Zadoff-Chu) sequence. For example, the subcarrier spacing is twice the subcarrier spacing of the normal SRS or DM-RS, and the length is a sequence of half the length of the normal SRS or DM-RS. However, the present invention is not limited thereto, and a specific reference signal sequence/leader sequence can be determined according to actual conditions. For the sake of simplicity, the following only uses the RS sequence as an example.
在本实施例中， 如果用户设备处于基站的覆盖之下， 基站侧可以为 D2D用户设 备预先分配好一些固定的时频资源作为 D2D通信资源。 例如， 周期为 10ms 或者 100ms, 大小是 6、 12或者整个上行带宽的资源块 （RB， Resource Block) 作为 D2D 通信资源池。 基站侧可以通过无线资源控制 （RRC， Radio Resource Control) 信令或 者***信息， 来通知 D2D用户设备具体的资源池信息。  In this embodiment, if the user equipment is under the coverage of the base station, the base station side may pre-allocate some fixed time-frequency resources as D2D communication resources for the D2D user equipment. For example, a resource block (RB, Resource Block) with a period of 10ms or 100ms and a size of 6, 12 or the entire uplink bandwidth is used as a D2D communication resource pool. The base station side can notify the D2D user equipment of the specific resource pool information by using RRC (Radio Resource Control) signaling or system information.
在本实施例中， D2D 发送用户设备可以接收基站侧发送的资源池分配信息， 或 者使用提前预定义的资源池信息 （例如没有基站覆盖的情况下）。 然后， 根据需要发 送的数据大小， 选择合适的控制信息 （例如 MCS， NDI和 RV等信息）， 将处理好的 控制信息放在 DM-RS两边的 RE上传输。  In this embodiment, the D2D transmitting user equipment may receive resource pool allocation information sent by the base station side, or use pre-defined resource pool information in advance (for example, if there is no base station coverage). Then, according to the size of the data to be sent, select the appropriate control information (such as MCS, NDI and RV) and place the processed control information on the REs on both sides of the DM-RS.
此外， 可从资源池中选择合适的 RB个数和位置。在第一个 SC-FDMA/OFDM符 号上发送对应选中的 RB个数和位置的 RS序列。 根据传输方式的不同， 可以选择不 同的根序列或者相同的循环移位。 每个子帧剩下的资源用来传输数据。  In addition, the appropriate number of RBs and locations can be selected from the resource pool. An RS sequence corresponding to the selected number of RBs and location is transmitted on the first SC-FDMA/OFDM symbol. Depending on the mode of transmission, you can choose a different root sequence or the same cyclic shift. The remaining resources of each sub-frame are used to transfer data.
以下对 RS序列映射 D2D通信资源的方式进行详细说明。  The manner in which the RS sequence maps the D2D communication resources will be described in detail below.
在一个实施方式中， 可以通过 RS序列的长度来指示 D2D通信资源的大小范围。 例如，在当前子帧中 D2D通信占用的资源数小于或等于 4个 RB时，可以用占据 4RB 长度的 RS序列来指示。 图 4是本发明实施例的根据 RS序列的长度划分子集的一示意图， 如图 4所示， 假设在每个 D2D子帧中， 资源池由 12个物理资源块（PRB， Physical Resource Block) 构成， 可以将这 12个 PRB划分为 3个大小为 4个 RB的子集， 每个子集的前一个 OFDM符号用来承载长度为 4RB的 RS序列， 后面的符号用来传输数据。 In one embodiment, the size range of the D2D communication resources may be indicated by the length of the RS sequence. For example, when the number of resources occupied by D2D communication in the current subframe is less than or equal to 4 RBs, it may be indicated by an RS sequence occupying 4 RB length. 4 is a schematic diagram of dividing a subset according to the length of an RS sequence according to an embodiment of the present invention. As shown in FIG. 4, it is assumed that in each D2D subframe, a resource pool is composed of 12 Physical Resource Blocks (PRBs). The 12 PRBs can be divided into three subsets of 4 RBs, and the previous OFDM symbol of each subset is used to carry an RS sequence of 4 RB length, and the following symbols are used to transmit data.
在本实施方式中，可以通过使用由不同根序列生成的 RS序列来指示 D2D通信资 源的大小， 以及通过使用不同的循环移位 （CS， Cycle Shift) 值来指示 D2D通信资 源的偏移值。 以下以 SRS序列为例， 来说明具体的映射关系。  In the present embodiment, the size of the D2D communication resource can be indicated by using an RS sequence generated by a different root sequence, and the offset value of the D2D communication resource can be indicated by using a different cyclic shift (CS, Cycle Shift) value. The following takes the SRS sequence as an example to illustrate the specific mapping relationship.
当 D2D用户设备只需要占用一个 RB时， 可以用序号为 0 (也可以是其他序号） 的根序列产生的 SRS序列来指示。 由于每个 SRS序列有 8个不同的 CS值， 可以通 过使用不同的 CS值来指示具体的 RB位置。 例如， CS值等于 0对应 RB0， CS值等 于 1对应 RB1， CS值等于 2对应 RB2， CS值等于 3对应 RB3。  When the D2D user equipment only needs to occupy one RB, it can be indicated by the SRS sequence generated by the root sequence with sequence number 0 (which can also be other sequence numbers). Since each SRS sequence has 8 different CS values, a specific CS value can be used to indicate a specific RB position. For example, a CS value equal to 0 corresponds to RB0, a CS value equals 1 to RB1, a CS value equals 2 to RB2, and a CS value equals 3 to RB3.
例如， 当 D2D用户设备选择 subset 0中的 RB1作为发送资源， 那么该 D2D用户 设备会选择序号为 0的根序列来产生 SRS序列， 并将 CS值为 1的 SRS序列作为发 送序列。  For example, when the D2D user equipment selects RB1 in subset 0 as the transmission resource, the D2D user equipment selects the root sequence with sequence number 0 to generate the SRS sequence, and uses the SRS sequence with CS value 1 as the transmission sequence.
而当 D2D用户设备需要占用 2个 RB时，可以选择序号是 1的根序列来产生 SRS 序列， 然后同样地通过不同的 CS值来指示具体的 RB位置。 例如， 当 D2D用户设备 占用 RB2和 RB3时， 可以使用序号是 1的根序列来产生 SRS序列， 并将 CS值为 2 的 SRS序列作为发送序列。 需要特别说明的是， 当 CS值等于 3时， 指示的资源超出 了 subsetO,此时用户设备占据的 2个 RB分别是 subsetO中的 RB3和 subsetl中的 RB0。  When the D2D user equipment needs to occupy 2 RBs, the root sequence with sequence number 1 can be selected to generate the SRS sequence, and then the specific RB position is indicated by different CS values. For example, when the D2D user equipment occupies RB2 and RB3, the root sequence with sequence number 1 can be used to generate the SRS sequence, and the SRS sequence with the CS value of 2 is used as the transmission sequence. It should be noted that when the CS value is equal to 3, the indicated resource exceeds the subsetO. At this time, the two RBs occupied by the user equipment are RB3 in the subsetO and RB0 in the subset1.
同样地， 当 D2D用户设备占用的资源数是 3个 RB时， 可以使用序号是 2的根 序列来生成 SRS序列； 占用 4个 RB时， 使用序号是 3的根序列来生成 SRS序列。  Similarly, when the number of resources occupied by the D2D user equipment is 3 RBs, the root sequence with sequence number 2 can be used to generate the SRS sequence; when 4 RBs are occupied, the root sequence with sequence number 3 is used to generate the SRS sequence.
另外， 为了减少不同的根序列带来的序列间干扰， 也可以不使用这么多根序列。 只采用 2个不同的根序列， 不同的资源大小和位置通过这两个根序列来判断。 例如， 序号为 0的根序列用来指示资源大小是 1RB和 2RB的情况， CS值是 {0， 1 , 2, 3} 或 {0， 2, 4， 6}用来指示 1RB的资源偏移， CS值是 {4， 5， 6， 7}或 {1， 3， 5， 7}用 来指示 2RB的资源偏移。序号为 1的根序列用来指示资源大小是 3RB和 4RB的情况。 同样的可以用 CS值是 {0， 1， 2, 3}或 {0， 2, 4， 6}用来指示 3RB 的资源偏移， 对 4RB的情况， 由于不存在资源偏移的情况， 只需要一个 CS值， 剩余的 CS值可以用 作其他用途。 需要注意的是， 以上只是以 SRS为例说明资源的映射方式， 如果采用其他的 ZC 序列， CS值可以不限于 8， 例如是 12或 16， 甚至更大。 本发明不限于此， 只需要满 足特定的条件即可； 这样的话， 只需要更少的根序列。 In addition, in order to reduce inter-sequence interference caused by different root sequences, it is also possible to not use so many sequences. Only two different root sequences are used, and different resource sizes and positions are judged by these two root sequences. For example, the root sequence with sequence number 0 is used to indicate that the resource size is 1 RB and 2 RB, and the CS value is {0, 1, 2, 3} or {0, 2, 4, 6} to indicate the resource offset of 1 RB. The CS value is {4, 5, 6, 7} or {1, 3, 5, 7} to indicate the resource offset of 2RB. The root sequence numbered 1 is used to indicate that the resource size is 3 RB and 4 RB. Similarly, the CS value is {0, 1, 2, 3} or {0, 2, 4, 6} to indicate the resource offset of 3RB, and in the case of 4RB, since there is no resource offset, only A CS value is required and the remaining CS values can be used for other purposes. It should be noted that the above only uses SRS as an example to describe the mapping mode of resources. If other ZC sequences are used, the CS value may not be limited to 8, for example, 12 or 16, or even larger. The present invention is not limited thereto, and only a specific condition needs to be satisfied; in this case, fewer root sequences are required.
以上对于 D2D通信占用的资源数小于或等于 4个 RB的情况进行了示意性说明， 对于大于 4RB的情况可以类似地处理。  The above description is for the case where the number of resources occupied by D2D communication is less than or equal to 4 RBs, and the case where it is larger than 4 RBs can be similarly processed.
例如， 在当前子帧中 D2D通信占用的资源数超过 4个 RB但不超过 8个 RB时， 可以用占据 8RB长度的 RS序列来指示。 图 5是本发明实施例的根据 RS序列的长度 划分子集的另一示意图， 如图 5所示， 可以将图 3中的 subset 1和 subset 2组成一个 长度是 8RB的新的 subset 1。 图 6是本发明实施例的根据 RS序列的长度划分子集的 另一示意图， 如图 6所示， 可以将图 4中的 subset 0和 subset 1组成一个长度是 8RB 的新的 subset 0。 与资源数不超过 4RB的情况类似， 也可以用序号不同的根序列对应 不同的资源大小（5RB， 6RB, 7RB或者 8RB)， 不同的 CS值对应不同的资源偏移位 置。 为避免重复这里不再复述。  For example, when the number of resources occupied by D2D communication in the current subframe exceeds 4 RBs but does not exceed 8 RBs, it can be indicated by an RS sequence occupying 8 RB length. FIG. 5 is another schematic diagram of dividing a subset according to the length of the RS sequence according to an embodiment of the present invention. As shown in FIG. 5, subset 1 and subset 2 in FIG. 3 may be combined into a new subset 1 having a length of 8 RB. 6 is another schematic diagram of dividing a subset according to the length of the RS sequence according to an embodiment of the present invention. As shown in FIG. 6, subset 0 and subset 1 in FIG. 4 may be combined into a new subset 0 having a length of 8 RB. Similar to the case where the number of resources does not exceed 4 RBs, the root sequences with different sequence numbers may correspond to different resource sizes (5 RB, 6 RB, 7 RB, or 8 RB), and different CS values correspond to different resource offset positions. To avoid repetition, we will not repeat them here.
同样的， 在当前子帧中 D2D通信占用的资源数超过 8个 RB但不超过 12个 RB 时， 可以用占据 12RB长度的 RS序列来指示。 图 7是本发明实施例的根据 RS序列 的长度划分子集的另一示意图， 如图 7所示， 当 D2D资源的长度超过 8个 RB且小 于 12个 RB时， 可以将图 4中的 3个 subset合并成一个长度是 12RB的 subset。此时 的 SRS序列占据的资源数是 12个 RB， 不同的根序列对应的资源大小分别是 9， 10， 11， 12个 RB。  Similarly, when the number of resources occupied by D2D communication in the current subframe exceeds 8 RBs but does not exceed 12 RBs, it can be indicated by an RS sequence occupying 12 RB length. FIG. 7 is another schematic diagram of dividing a subset according to the length of an RS sequence according to an embodiment of the present invention. As shown in FIG. 7, when the length of the D2D resource exceeds 8 RBs and is less than 12 RBs, 3 of FIG. 4 may be used. The subsets are merged into a subset of length 12RB. The number of resources occupied by the SRS sequence at this time is 12 RBs, and the resource sizes corresponding to different root sequences are 9, 10, 11, 12 RBs.
在本实施方式中， 当 D2D发送用户设备通过上述方法选择对应的 RS序列后，可 以在相应长度的 RB上发送该 RS序列。  In this embodiment, after the D2D transmitting user equipment selects the corresponding RS sequence by the foregoing method, the RS sequence may be sent on the RB of the corresponding length.
在另一个实施方式中，可以通过 RS序列的长度来指示 D2D通信资源的大小。这 种方式下， RS序列在频域上占用的 RB个数等于为 D2D通信分配的 RB个数， 在时 域上占据每个 D2D子帧的第一个符号。  In another embodiment, the size of the D2D communication resource may be indicated by the length of the RS sequence. In this manner, the number of RBs occupied by the RS sequence in the frequency domain is equal to the number of RBs allocated for D2D communication, and the first symbol of each D2D subframe is occupied in the time domain.
在本实施方式中， 假设在每个 D2D子帧， 资源池由 12个 PRB构成。 在第一个 In the present embodiment, it is assumed that in each D2D subframe, the resource pool is composed of 12 PRBs. In the first
SC-FDM/OFDM符号上传输长度为 12RB的 RS序列。图 8是本发明实施例的根据 RS 序列的长度划分子集的另一示意图， 如图 8所示， 可以将整个资源池划分为 3个长度 为 4RB的子集。 以下以 SRS序列为例进行说明， 由于 LTE标准里面规定 SRS序列的 CS值最多只有 8个， 每个 subset需要两个 SRS根序列才能生成足够多的序列用来指 示不同的资源大小和位置。 An RS sequence of 12 RB in length is transmitted on the SC-FDM/OFDM symbol. FIG. 8 is another schematic diagram of dividing a subset according to the length of an RS sequence according to an embodiment of the present invention. As shown in FIG. 8, the entire resource pool may be divided into three subsets having a length of 4 RBs. The following takes the SRS sequence as an example. Since the LTE standard specifies that the SRS sequence has a maximum of eight CS values, each subset needs two SRS root sequences to generate enough sequences to refer to Show different resource sizes and locations.
例如， 可以用序号为 0、 1的根序列生成的 SRS序列来对应 subset 0里的资源， 序号为 2、 3的根序列生成的 SRS序列来对应 subset 1里的资源， 序号为 4、 5的根序 列生成的 SRS序列来对应 subset 2里的资源。  For example, the SRS sequence generated by the root sequence of sequence numbers 0 and 1 may be used to correspond to the resource in subset 0, and the SRS sequence generated by the root sequence of sequence numbers 2 and 3 corresponds to the resource in subset 1, and the sequence number is 4 or 5. The SRS sequence generated by the root sequence corresponds to the resources in subset 2.
然后， 通过使用不同的 CS值来指示不同的资源大小和位置。 例如用序号为 0的 根序列生成的 SRS序列来对应资源大小是 1RB和两 RB的情况， CS值是 {0， 1， 2， 3}分别对应占据 1个 RB的情况， 相应的 RB位置是 {0， 1， 2， 3} , CS值是 {4， 5， 6， 7}分别对应占据两个 RB的情况， 相应的 RB位置是 { {0， 1 }， { 1， 2}， {2， 3}， {3， 0»。 用序号为 1的根序列生成的 SRS序列来对应资源大小是 3RB和 4RB的情况， 同样的， 不同的 CS值能表示占 3RB和 4RB以及具体的资源位置的情况。  Then, different resource sizes and locations are indicated by using different CS values. For example, if the SRS sequence generated by the root sequence of sequence number 0 corresponds to the case where the resource size is 1 RB and two RBs, the CS value is {0, 1, 2, 3} respectively occupying 1 RB, and the corresponding RB position is {0, 1, 2, 3}, the CS value is {4, 5, 6, 7} corresponding to the case of occupying two RBs respectively, and the corresponding RB position is { {0, 1 }, { 1, 2}, { 2, 3}, {3, 0». The SRS sequence generated by the root sequence of sequence number 1 corresponds to the case where the resource size is 3 RB and 4 RB. Similarly, different CS values can represent 3 RB and 4 RB and specific resource locations.
需要注意的是， 这里只是以 SRS为例说明资源的映射方式， 如果采用其他的 ZC 序列， CS值可以不限于 8， 比如是 12或 16，甚至更大； 只需要满足特定的条件即可。 这样的话， 只需要更少的根序列。  It should be noted that the SRS is used as an example to illustrate the mapping of resources. If other ZC sequences are used, the CS value may not be limited to 8, for example, 12 or 16, or even larger; only certain conditions are required to be met. In this case, fewer root sequences are needed.
图 9是本发明实施例的根据 RS序列的长度划分子集的另一示意图， 图 10是本 发明实施例的根据 RS序列的长度划分子集的另一示意图，图 11是本发明实施例的根 据 RS序列的长度划分子集的另一示意图。 图 9和图 10分别给出了当 D2D通信占用 超过 5个 RB且小于等于 8个 RB的情况，图 11给出了当 D2D通信占用大于 8个 RB 且小于等于 12个 RB的情况。同样的，也可以通过使用不同序号的根序列来生成 SRS， 对应不同的资源大小， 并且不同的 CS值对应不同的资源位置偏移。  FIG. 9 is another schematic diagram of dividing a subset according to a length of an RS sequence according to an embodiment of the present invention, and FIG. 10 is another schematic diagram of dividing a subset according to a length of an RS sequence according to an embodiment of the present invention, and FIG. 11 is an embodiment of the present invention. Another schematic of the subset is divided according to the length of the RS sequence. Figure 9 and Figure 10 show the case where D2D communication occupies more than 5 RBs and is less than or equal to 8 RBs. Figure 11 shows the case where D2D communication occupies more than 8 RBs and is less than or equal to 12 RBs. Similarly, SRS can also be generated by using root sequences of different sequence numbers, corresponding to different resource sizes, and different CS values corresponding to different resource location offsets.
以上对于 RS序列如何映射 D2D通信资源进行了说明，以下对控制信息的生成方 式进行说明。  The above describes how the RS sequence maps D2D communication resources. The following describes how to generate control information.
在一个实施方式中， 在生成控制信息时可以使用固定的码率进行编码。控制信息 可以包含但不限于 MCS， NDI, RV等信息。 例如， 在某种应用场景下， 控制信息里 只含有 MCS和 NDI， 但本发明不限于此。 根据现有 LTE标准， MCS 占 5bit， NDI 占 lbit， 那么这个控制信息的大小是 6bit。 当然在 D2D通信中， 可以对用到的 MCS 进行限制， 这样的话用来表示 MCS的 bit数可以更少， 比如 3bit或者 4bit。 因此， 每 次通信的控制信息的大小 （size) 可以是确定的。  In one embodiment, encoding may be performed using a fixed code rate when generating control information. Control information can include, but is not limited to, MCS, NDI, RV, etc. For example, in an application scenario, the control information only contains MCS and NDI, but the invention is not limited thereto. According to the existing LTE standard, MCS occupies 5 bits and NDI occupies lbit, then the size of this control information is 6 bits. Of course, in D2D communication, the MCS used can be limited, so that the number of bits of the MCS can be less, such as 3bit or 4bit. Therefore, the size of the control information for each communication can be determined.
以 6bit的控制信息为例来说明控制信息的编码方式，这 6比特的控制信息可以采 用现有 LTE标准里的 （20， A) 或者 （32， A) 的瑞德穆勒 （RM， eed-Muller) 编 码器， 编码成 20比特或者 32bit， 32比特的码字可以减少一些信息比特变成 24bit， 其中 A是实际的信息 bit数。 以下以 20bit的编码方式来说明信息比特处理流程。 The 6-bit control information is taken as an example to illustrate the encoding method of the control information. The 6-bit control information can be used in the existing LTE standard (20, A) or (32, A) of Reid Muller (RM, eed- Muller) The coder, coded into 20-bit or 32-bit, 32-bit codeword can reduce some information bits into 24 bits, where A is the actual number of information bits. The information bit processing flow will be described below in a 20-bit encoding manner.
图 12是本发明实施例的控制信息的一处理流程图， 如图 12所示， 可以先将信息 比特经过 RM编码器编码得到 20比特，将编码后信息进行加扰然后调制成 10个 QPSK 符号， 分别映射到 DM-RS符号两边的 RE上。 10个 OFDM符号最少需要占用 10个 RE, 可能的映射方式有很多种。  FIG. 12 is a flowchart of processing of control information according to an embodiment of the present invention. As shown in FIG. 12, information bits may be first encoded by an RM encoder to obtain 20 bits, and the encoded information is scrambled and then modulated into 10 QPSK symbols. , mapped to the REs on both sides of the DM-RS symbol. A minimum of 10 REs are required for 10 OFDM symbols, and there are many possible mapping methods.
图 13是本发明实施例的控制信道的一示意图， 如图 13所示， 可以将控制信息映 射在任意一个 DM-RS的两边的任意一个符号里。图 14是本发明实施例的控制信道的 另一示意图，如图 14所示，也可以将控制信息映射在任意一个 DM-RS的两边的两个 符号里。 但本发明不限于此， 当然也可以同时映射在两个 DM-RS的两边的符号里。  Figure 13 is a diagram showing a control channel according to an embodiment of the present invention. As shown in Figure 13, control information can be mapped to any one of the two sides of any one of the DM-RSs. Fig. 14 is another schematic diagram of the control channel according to the embodiment of the present invention. As shown in Fig. 14, the control information may be mapped to two symbols on either side of any one of the DM-RSs. However, the present invention is not limited thereto, and it is of course possible to simultaneously map the symbols on both sides of the two DM-RSs.
在本实施方式中， 由于控制信息的比特数固定， 编码器码率也是固定的， 因此控 制信息占的 RE个数也是固定的， 只要提前规定好控制信息所在的位置， D2D接收端 的用户设备可以容易获得该控制信息。  In this embodiment, since the number of bits of the control information is fixed, the encoder code rate is also fixed. Therefore, the number of REs occupied by the control information is also fixed. As long as the location of the control information is specified in advance, the user equipment at the D2D receiving end can This control information is easy to obtain.
当然为了进一步提高控制信息的可靠性， 可以为控制信息进一步引入冗余度。例 如， 将编码后的 20bit复制一遍形成 40bit， 调制成 20个 QPSK符号； 将这 20个符号 分别在两个时隙 （slot) 里传输。  Of course, in order to further improve the reliability of the control information, redundancy may be further introduced for the control information. For example, the encoded 20 bits are copied once to form 40 bits, and modulated into 20 QPSK symbols; these 20 symbols are respectively transmitted in two slots.
图 15是本发明实施例的控制信道的另一示意图， 如图 15所示， 可以将控制信息 映射在两个 DM-RS的两边的任意一个符号里。图 16是本发明实施例的控制信道的另 一示意图，如图 16所示，也可以将控制信息映射在两个 DM-RS的两边的两个符号里。  15 is another schematic diagram of a control channel according to an embodiment of the present invention. As shown in FIG. 15, control information may be mapped to any one of two sides of two DM-RSs. 16 is another schematic diagram of a control channel according to an embodiment of the present invention. As shown in FIG. 16, control information may also be mapped in two symbols on both sides of two DM-RSs.
在另一个实施方式中， 在生成控制信息时， 可以根据信号质量信息采用不同的码 率进行编码。 在无线通信***中， 信道环境随时可能发生变化。 为了适应不同的信道 条件， 可以为控制信息提供不同的信道编码码率。  In another embodiment, when the control information is generated, encoding may be performed using different code rates based on the signal quality information. In a wireless communication system, the channel environment may change at any time. In order to adapt to different channel conditions, different channel coding rate can be provided for the control information.
例如， D2D 发送用户设备可以根据信道状况， 将信道质量划分为低、 中、 高三 个等级。 可以分别采用不同的码率对控制信息进行编码， 在信道质量较差的情况下， 选择码率最低的信道编码， 为信息比特提高信道编码增益， 提升传输可靠性。  For example, the D2D transmitting user equipment can classify the channel quality into three levels: low, medium, and high according to channel conditions. The control information may be encoded by using different code rates respectively. When the channel quality is poor, the channel coding with the lowest code rate is selected, and the channel coding gain is improved for the information bits, thereby improving the transmission reliability.
图 17是本发明实施例的控制信息的另一处理流程图， 如图 17所示， 为了提高接 收端接收的可靠性， 可以给控制信息添加 CRC校验。考虑到控制信息的数据量较小， 可以使用 8bit或者 12bit的 CRC校验。然后，将得到的 CRC比特通过例如 D2D-RNTI 信息进行加扰， 将加扰后的 CRC比特添加在控制信息后面。 然后， 将包含 CRC比特的控制信息用例如 1/3码率的卷积码编码器进行编码； 对于编码后的比特， 根据信道质量的好坏进行速率匹配， 得到三个大小不同的控制消 息， 分别对应低、 中、 高三种信道质量。 最后将得到的控制信息进行 QPSK调制， 将 得到的 QPSK符号映射到最靠近 DM-RS两边的符号上。 D2D接收用户设备在解调控 制信息时， 需要盲检这 3种可能的组合。 FIG. 17 is another processing flowchart of the control information according to the embodiment of the present invention. As shown in FIG. 17, in order to improve the reliability of receiving at the receiving end, a CRC check may be added to the control information. Considering that the amount of data of the control information is small, an 8-bit or 12-bit CRC check can be used. The resulting CRC bits are then scrambled by, for example, D2D-RNTI information, and the scrambled CRC bits are added after the control information. Then, the control information including the CRC bits is encoded by a convolutional code encoder of, for example, a 1/3 code rate; for the encoded bits, rate matching is performed according to the quality of the channel, and three control messages of different sizes are obtained. Corresponding to low, medium and high channel quality respectively. Finally, the obtained control information is QPSK modulated, and the obtained QPSK symbols are mapped to the symbols closest to both sides of the DM-RS. When the D2D receiving user equipment demodulates the control information, the three possible combinations of blind detection are required.
图 18是本发明实施例的控制信道的另一示意图；图 19是本发明实施例的控制信 道的另一示意图； 图 20是本发明实施例的控制信道的另一示意图。 其中， 图 18对应 信道质量高的情况， 图 19对应信道质量中的情况， 图 20对应信道质量差的情况。  18 is another schematic diagram of a control channel according to an embodiment of the present invention; FIG. 19 is another schematic diagram of a control channel according to an embodiment of the present invention; and FIG. 20 is another schematic diagram of a control channel according to an embodiment of the present invention. 18 corresponds to the case where the channel quality is high, FIG. 19 corresponds to the case of the channel quality, and FIG. 20 corresponds to the case where the channel quality is poor.
由上述实施例可知， 通过包含参考信号序列 /前导序列和控制信息的控制信道， D2D接收用户设备可以根据参考信号序列 /前导序列获得 D2D通信资源位置，并根据 D2D通信资源位置获得用于 D2D通信的控制信息。 由此，可以降低 D2D通信中接收 机的解调复杂度，减小解调时需要的缓存，并且减少由于资源碰撞而造成的资源浪费。 实施例 2  It can be seen from the above embodiment that the D2D receiving user equipment can obtain the D2D communication resource location according to the reference signal sequence/preamble sequence by using the control channel including the reference signal sequence/preamble sequence and the control information, and obtain the D2D communication according to the D2D communication resource location. Control information. Thereby, the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced. Example 2
本发明实施例提供一种 D2D通信中控制信息的传输方法， 从接收侧的 D2D用户 设备 （第二用户设备， 也可称为 D2D接收用户设备） 进行说明。 与实施例 1相同的 内容不再赘述。  The embodiment of the present invention provides a method for transmitting control information in D2D communication, which is described from a D2D user equipment (a second user equipment, which may also be referred to as a D2D receiving user equipment) on the receiving side. The same contents as those in Embodiment 1 will not be described again.
图 21是本发明实施例的 D2D通信中控制信息的传输方法的一流程图， 如图 21 所示， 所述传输方法包括：  FIG. 21 is a flowchart of a method for transmitting control information in D2D communication according to an embodiment of the present invention. As shown in FIG. 21, the transmission method includes:
步骤 2101， 第二用户设备接收用于 D2D通信的控制信号， 发送所述控制信号的 控制信道中包括用于 D2D通信的控制信息以及指示 D2D通信资源位置的参考信号序 列或前导序列；  Step 2101: The second user equipment receives a control signal for D2D communication, where the control channel that sends the control signal includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource;
步骤 2102， 第二用户设备检测参考信号序列或前导序列以获得 D2D通信资源位 置， 并根据 D2D通信资源位置获得用于 D2D通信的控制信息。  Step 2102: The second user equipment detects the reference signal sequence or the preamble sequence to obtain a D2D communication resource location, and obtains control information for D2D communication according to the D2D communication resource location.
在本实施例中， D2D 接收用户设备可以接收基站侧发送的资源池分配信息， 或 者使用提前预定义的资源池信息。 D2D 接收用户设备可以在资源池里检测存在可能 的 RS序列或前导序列； 根据检测到的 RS序列或前导序列确定需要接收数据的时频 位置。 在确定了数据传输的时频位置以后， 去 DM-RS两边的 RE上去检测控制消息 并解调控制消息， 然后利用控制信息里的 MCS， NDI, RV等信息解调出最终的 D2D 数据。 In this embodiment, the D2D receiving user equipment may receive the resource pool allocation information sent by the base station side, or use the resource pool information predefined in advance. The D2D receiving user equipment may detect that there is a possible RS sequence or a preamble sequence in the resource pool; and determine a time-frequency location of the data to be received according to the detected RS sequence or the preamble sequence. After determining the time-frequency position of the data transmission, the REs on both sides of the DM-RS are detected to detect the control message and demodulate the control message, and then the final D2D is demodulated by using information such as MCS, NDI, RV in the control information. data.
在本实施例中，用于 D2D通信的控制信息可以被配置在靠近 DM-RS的一个或多 个 RE上； 以及 RS序列或前导序列可以被配置在子帧的第一个 SC-FDMA或 OFDM 符号上。  In this embodiment, the control information for D2D communication may be configured on one or more REs close to the DM-RS; and the RS sequence or the preamble sequence may be configured in the first SC-FDMA or OFDM of the subframe On the symbol.
其中，可以通过 RS序列或前导序列的长度来指示 D2D通信资源的大小或者大小 范围。此外，可以通过使用由不同根序列生成的 RS序列或前导序列来指示 D2D通信 资源的大小， 以及通过使用不同的 CS值来指示 D2D通信资源的偏移值。  Wherein, the size or size range of the D2D communication resource may be indicated by the length of the RS sequence or the preamble sequence. Furthermore, the size of the D2D communication resource can be indicated by using an RS sequence or a preamble sequence generated by different root sequences, and the offset value of the D2D communication resource can be indicated by using a different CS value.
在本实施例中， D2D 接收用户设备可以通过使用不同长度、 由不同序号的根序 列生成的、不同 CS值的 RS序列或前导序列去和接收到 RS序列或前导序列进行相关 计算，检测出 D2D发送用户设备发送的具体的 RS序列或前导序列，从而得到相应的 资源位置。然而， 如果 D2D接收用户设备解调所有可能的 RS序列或前导序列， 复杂 度会很大，因此有必要对 D2D用户设备需要检测的 RS序列或前导序列进行一定的区 分， 以降低接收侧 D2D用户设备的复杂度。  In this embodiment, the D2D receiving user equipment can detect the D2D by using the RS sequence or the preamble sequence of different CS values generated by different lengths and different sequence numbers to receive the RS sequence or the preamble sequence. Send a specific RS sequence or preamble sequence sent by the user equipment to obtain the corresponding resource location. However, if the D2D receiving user equipment demodulates all possible RS sequences or preamble sequences, the complexity may be large. Therefore, it is necessary to distinguish the RS sequence or the preamble sequence that the D2D user equipment needs to detect to reduce the receiving side D2D user. The complexity of the device.
在本实施例中， 可以将不同长度的 RS序列或前导序列构成的搜索空间划分为公 共搜索空间（CSS， Common Search Space)和用户搜索空间（USS， UE specific Search Space) ; 可以检测公共搜索空间以获取用于 D2D广播或组播通信的资源位置， 以及 检测用户搜索空间以获取用于 D2D单播通信的资源位置。  In this embodiment, the search space formed by the RS sequence or the preamble sequence of different lengths may be divided into a common search space (CSS, Common Search Space) and a user search space (USS, UE specific search space); the common search space may be detected. To obtain a resource location for D2D broadcast or multicast communication, and to detect a user search space to obtain a resource location for D2D unicast communication.
在本实施例中， 可以借用 LTE网络中 PDCCH的搜索空间 （search space )、 聚合 度 （aggregation level) 和候选 （candidate) 概念。 将 D2D用户设备需要检测的所有 S序列或前导序列称为搜索空间， 不同长度的 RS序列或前导序列可以看做是不同 的聚合度。 例如， 长度分别是 4RB， 8 B, 12RB…的 RS序列可以看做聚合度是 4， 8， 12···。  In this embodiment, the search space, the aggregation level, and the candidate concept of the PDCCH in the LTE network may be borrowed. All S sequences or preamble sequences that need to be detected by the D2D user equipment are called search spaces, and RS sequences or preamble sequences of different lengths can be regarded as different degrees of aggregation. For example, an RS sequence of length 4 RB, 8 B, 12 RB... can be regarded as a degree of aggregation of 4, 8, 12...
对 D2D用户设备来说， 每个聚合度的 candidate可以只有几个， 这样可以降低 D2D检测的复杂度。将所有不同长度的 RS序列或前导序列构成的搜索空间分为公共 搜索空间和用户搜索空间， 公共搜索空间对应每个 aggregation level下特定序号和 /或 特定 CS值的 RS序列或前导序列， 用户搜索空间对应 D2D通信对之间特定序号和 / 或者特定 CS值的 RS序列或前导序列。 其中， CSS里的序列用来指示传输广播信息 的资源位置， 即可用于 D2D广播通信或者组播通信； USS里的序列用来指示 D2D用 户设备对之间的传输资源位置， 即可用于 D2D单播通信。 每个接收侧的 D2D用户设 备需要同时检测 CSS和 uss。 For D2D user equipment, there can be only a few candidates for each degree of aggregation, which can reduce the complexity of D2D detection. The search space formed by all RS sequences or preamble sequences of different lengths is divided into a common search space and a user search space, and the common search space corresponds to an RS sequence or a preamble sequence of a specific sequence number and/or a specific CS value at each aggregation level, and the user searches. The space corresponds to an RS sequence or a preamble sequence of a specific sequence number and/or a specific CS value between pairs of D2D communication. The sequence in the CSS is used to indicate the location of the resource for transmitting the broadcast information, and can be used for D2D broadcast communication or multicast communication. The sequence in the USS is used to indicate the location of the transmission resource between the D2D user equipment pair, and can be used for the D2D single. Broadcast communication. D2D user setting on each receiving side It is necessary to detect both CSS and uss.
由上述实施例可知， 通过包含参考信号序列 /前导序列和控制信息的控制信道， As can be seen from the above embodiments, by using a control channel including a reference signal sequence/preamble sequence and control information,
D2D接收用户设备可以根据参考信号序列 /前导序列获得 D2D通信资源位置，并根据 D2D通信资源位置获得用于 D2D通信的控制信息。 由此，可以降低 D2D通信中接收 机的解调复杂度，减小解调时需要的缓存，并且减少由于资源碰撞而造成的资源浪费。 实施例 3 The D2D receiving user equipment can obtain the D2D communication resource location according to the reference signal sequence/preamble sequence, and obtain control information for D2D communication according to the D2D communication resource location. Thereby, the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced. Example 3
本发明实施例提供一种 D2D通信中控制信息的传输装置， 该传输装置可以被配 置到 D2D发送用户设备中。本实施例对应于实施例 1所述的 D2D通信中控制信息的 传输方法， 相同的内容不再赘述。  The embodiment of the invention provides a transmission device for controlling information in D2D communication, and the transmission device can be configured into a D2D transmission user equipment. This embodiment corresponds to the method for transmitting control information in the D2D communication described in Embodiment 1, and the same content is not described herein again.
图 22是本发明实施例的 2D通信中控制信息的传输装置的一构成示意图， 如图 22所示， 所述传输装置 2200包括： 信道配置单元 2201和信息发送单元 2202; 其中， 信道配置单元 2201 用于配置用于 D2D通信的控制信道， 所述控制信道中包括用于 D2D通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导序列； 信息 发送单元 2202通过该控制信道发送用于 D2D通信的控制信息以及参考信号序列 /前 导序列。  FIG. 22 is a schematic diagram of a configuration of a control device for transmitting information in 2D communication according to an embodiment of the present invention. As shown in FIG. 22, the transmission device 2200 includes: a channel configuration unit 2201 and an information sending unit 2202; wherein, the channel configuration unit 2201 And a control channel for configuring D2D communication, where the control channel includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource; and the information sending unit 2202 transmits the D2D through the control channel. Control information for communication and reference signal sequence/leader sequence.
在本实施例中， 用于 D2D通信的控制信息可以被配置在靠近解调参考信号的一 个或多个资源粒子上； 以及该参考信号序列或前导序列被配置在子帧的第一个 SC-FDMA或 OFDM符号上。  In this embodiment, the control information for D2D communication may be configured on one or more resource particles close to the demodulation reference signal; and the reference signal sequence or preamble sequence is configured in the first SC- of the subframe. On FDMA or OFDM symbols.
如图 22所示， 传输装置 2200还可以包括： 资源选择单元 2203， 在基站侧配置 的资源池中或者在预设的资源池中选择 D2D通信资源。  As shown in FIG. 22, the transmission device 2200 may further include: a resource selection unit 2203, selecting a D2D communication resource in a resource pool configured on the base station side or in a preset resource pool.
如图 22所示， 传输装置 2200还可以包括： 序列生成单元 2204， 生成该参考信 号序列或前导序列； 其中通过该参考信号序列或前导序列的长度来指示 D2D通信资 源的大小或者大小范围。此外， 还可以通过使用由不同根序列生成的参考信号序列或 前导序列来指示 D2D通信资源的大小， 以及通过使用不同的循环移位值来指示 D2D 通信资源的偏移值。  As shown in FIG. 22, the transmission device 2200 may further include: a sequence generating unit 2204, generating the reference signal sequence or a preamble sequence; wherein a size or a size range of the D2D communication resource is indicated by the length of the reference signal sequence or the preamble sequence. Furthermore, it is also possible to indicate the size of the D2D communication resource by using a reference signal sequence or a preamble sequence generated by different root sequences, and to indicate an offset value of the D2D communication resource by using a different cyclic shift value.
在本实施例中， 参考信号序列或前导序列可以为探测参考信号序列， 或者解调参 考信号序列， 或者其他的 ZC序列。 但本发明不限于此， 可以根据实际情况确定具体 的序列。 如图 22所示， 传输装置 2200还可以包括： 信息生成单元 2205， 生成用于 D2D 通信的控制信息。 其中， 控制信息可以包括如下信息的一种或组合： 调制编码方案信 息、 新数据指示信息和冗余版本信息。 但本发明不限于此， 可以根据实际情况确定具 体的控制信息。 In this embodiment, the reference signal sequence or the preamble sequence may be a sounding reference signal sequence, or a demodulated reference signal sequence, or other ZC sequence. However, the present invention is not limited thereto, and a specific sequence can be determined according to actual conditions. As shown in FIG. 22, the transmission device 2200 may further include: an information generating unit 2205 that generates control information for D2D communication. The control information may include one or a combination of the following information: modulation coding scheme information, new data indication information, and redundancy version information. However, the present invention is not limited thereto, and specific control information may be determined according to actual conditions.
在本实施例中， 信息生成单元 2205可以使用固定的码率进行编码， 或者根据信 号质量信息采用不同的码率进行编码。信道配置单元 2201还可以用于将用于 D2D通 信的控制信息映射到解调参考信号两侧符号的一个或多个资源粒子上，或者解调参考 信号任意一侧符号的一个或多个资源粒子上。  In the present embodiment, the information generating unit 2205 may perform encoding using a fixed code rate or encode using different code rates based on the signal quality information. The channel configuration unit 2201 may be further configured to map control information for D2D communication to one or more resource particles of symbols on both sides of the demodulation reference signal, or demodulate one or more resource particles of symbols on either side of the reference signal. on.
本发明实施例还提供一种用户设备， 该用户设备包括如上所述的 D2D通信中控 制信息的传输装置。  The embodiment of the present invention further provides a user equipment, which includes the transmission device for controlling information in D2D communication as described above.
图 23是本发明实施例的用户设备 2300的***构成的一示意框图。如图 23所示， 该用户设备 2300可以包括中央处理器 100和存储器 140; 存储器 140耦合到中央处 理器 100。 值得注意的是， 该图是示例性的； 还可以使用其他类型的结构， 来补充或 代替该结构， 以实现电信功能或其他功能。  FIG. 23 is a schematic block diagram showing the system configuration of the user equipment 2300 according to the embodiment of the present invention. As shown in FIG. 23, the user equipment 2300 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100. It is worth noting that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
在一个实施方式中， D2D 通信中控制信息的传输装置的功能可以被集成到中央 处理器 100中。 其中， 中央处理器 100可以被配置为实现如实施例 1所述的 D2D通 信中控制信息的传输方法。  In one embodiment, the functionality of the transmission means for controlling information in D2D communication can be integrated into the central processor 100. The central processing unit 100 may be configured to implement the transmission method of the control information in the D2D communication as described in Embodiment 1.
在另一个实施方式中， D2D 通信中控制信息的传输装置可以与中央处理器 100 分开配置， 例如可以将 D2D通信中控制信息的传输装置配置为与中央处理器 100连 接的芯片， 通过中央处理器的控制来实现 D2D通信中控制信息的传输装置的功能。  In another embodiment, the transmission information of the control information in the D2D communication may be configured separately from the central processing unit 100, for example, the transmission device of the control information in the D2D communication may be configured as a chip connected to the central processing unit 100, through the central processing unit. Control to implement the function of the transmission device for controlling information in D2D communication.
如图 23所示， 该用户设备 2300还可以包括： 通信模块 110、 输入单元 120、 音 频处理单元 130、 显示器 160、 电源 170。 值得注意的是， 用户设备 2300也并不是必 须要包括图 23中所示的所有部件； 此外， 用户设备 2300还可以包括图 23中没有示 出的部件， 可以参考现有技术。  As shown in FIG. 23, the user equipment 2300 may further include: a communication module 110, an input unit 120, an audio processing unit 130, a display 160, and a power supply 170. It should be noted that the user equipment 2300 does not necessarily have to include all of the components shown in FIG. 23; in addition, the user equipment 2300 may also include components not shown in FIG. 23, and reference may be made to the prior art.
如图 23所示， 中央处理器 100有时也称为控制器或操作控件， 可以包括微处理 器或其他处理器装置和 /或逻辑装置，该中央处理器 100接收输入并控制用户设备 2300 的各个部件的操作。  As shown in FIG. 23, central processor 100, also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls each of user devices 2300. The operation of the part.
其中， 存储器 140， 例如可以是缓存器、 闪存、 硬驱、 可移动介质、 易失性存储 器、非易失性存储器或其它合适装置中的一种或更多种。可储存上述与失败有关的信 息， 此外还可存储执行有关信息的程序。并且中央处理器 100可执行该存储器 140存 储的该程序， 以实现信息存储或处理等。其他部件的功能与现有类似，此处不再赘述。 用户设备 2300的各部件可以通过专用硬件、 固件、 软件或其结合来实现， 而不偏离 本发明的范围。 The memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. Can store the above-mentioned letter related to failure In addition, a program for executing related information can be stored. And the central processing unit 100 can execute the program stored by the memory 140 to implement information storage or processing and the like. The functions of other components are similar to those of the existing ones and will not be described here. The various components of user device 2300 may be implemented by special purpose hardware, firmware, software, or a combination thereof without departing from the scope of the invention.
由上述实施例可知， 通过包含参考信号序列 /前导序列和控制信息的控制信道， As can be seen from the above embodiments, by using a control channel including a reference signal sequence/preamble sequence and control information,
D2D接收侧可以根据参考信号序列 /前导序列获得 D2D通信资源位置， 并根据 D2D 通信资源位置获得用于 D2D通信的控制信息。 由此， 可以降低 D2D通信中接收机的 解调复杂度， 减小解调时需要的缓存， 并且减少由于资源碰撞而造成的资源浪费。 实施例 4 The D2D receiving side may obtain the D2D communication resource location according to the reference signal sequence/preamble sequence, and obtain control information for D2D communication according to the D2D communication resource location. Thereby, the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced. Example 4
本发明实施例提供一种 D2D通信中控制信息的传输装置， 该传输装置可以被配 置到 D2D接收用户设备中。本实施例对应于实施例 2所述的 D2D通信中控制信息的 传输方法， 相同的内容不再赘述。  Embodiments of the present invention provide a device for transmitting control information in D2D communication, and the transmission device can be configured into a D2D receiving user equipment. This embodiment corresponds to the method for transmitting control information in D2D communication according to Embodiment 2, and the same content will not be described again.
图 24是本发明实施例的 D2D通信中控制信息的传输装置的一构成示意图，如图 24所示， 所述传输装置 2400包括： 信息接收单元 2401和信息检测单元 2402;  Figure 24 is a block diagram showing a structure of a control device for transmitting information in D2D communication according to an embodiment of the present invention. As shown in Figure 24, the transmission device 2400 includes: an information receiving unit 2401 and an information detecting unit 2402;
其中， 信息接收单元 2401接收用于 D2D通信的控制信号， 其中发送该控制信号 的控制信道中包括用于 D2D通信的控制信息以及指示 D2D通信资源位置的参考信号 序列或前导序列；信息检测单元 2402检测该参考信号序列或前导序列以获得 D2D通 信资源位置， 并根据 D2D通信资源位置获得用于 D2D通信的控制信息。  The information receiving unit 2401 receives a control signal for D2D communication, where the control channel for transmitting the control signal includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource; the information detecting unit 2402 The reference signal sequence or preamble sequence is detected to obtain a D2D communication resource location, and control information for D2D communication is obtained based on the D2D communication resource location.
在本实施例中， 用于 D2D通信的控制信息可以被配置在靠近解调参考信号的一 个或多个资源粒子上； 以及参考信号序列或前导序列被配置在子帧的第一个 SC-FDMA或 OFDM符号上。  In this embodiment, the control information for D2D communication may be configured on one or more resource particles close to the demodulation reference signal; and the reference signal sequence or preamble sequence is configured in the first SC-FDMA of the subframe Or on an OFDM symbol.
在本实施例中， 可以通过参考信号序列或前导序列的长度来指示 D2D通信资源 的大小或者大小范围。此外， 可以通过使用由不同根序列生成的参考信号序列或前导 序列来指示 D2D通信资源的大小， 以及通过使用不同的循环移位值来指示 D2D通信 资源的偏移值。  In this embodiment, the size or size range of the D2D communication resources may be indicated by the length of the reference signal sequence or the preamble sequence. Furthermore, the size of the D2D communication resource can be indicated by using a reference signal sequence or a preamble sequence generated by different root sequences, and the offset value of the D2D communication resource can be indicated by using a different cyclic shift value.
在本实施例中，可以将不同长度的参考信号序列或前导序列构成的搜索空间划分 为公共搜索空间和用户搜索空间； 信息检测单元 2402检测公共搜索空间以获取用于 D2D广播或组播通信的资源位置， 以及检测用户搜索空间以获取用于 D2D单播通信 的资源位置。 In this embodiment, the search space formed by the reference signal sequence or the preamble sequence of different lengths may be divided into a common search space and a user search space; the information detecting unit 2402 detects the common search space to obtain a D2D broadcast or multicast communication. Resource location, and detecting user search space for D2D unicast communication Resource location.
本发明实施例还提供一种用户设备， 该用户设备包括如上所述的 D2D通信中控 制信息的传输装置。 该用户设备的构成可以参考图 23， 可以包括中央处理器 100和 存储器 140; 存储器 140耦合到中央处理器 100。  The embodiment of the present invention further provides a user equipment, which includes the transmission device for controlling information in D2D communication as described above. The user equipment can be constructed with reference to FIG. 23, and can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100.
在一个实施方式中， D2D 通信中控制信息的传输装置的功能可以被集成到中央 处理器 100中。 其中， 中央处理器 100可以被配置为实现如实施例 2所述的 D2D通 信中控制信息的传输方法。  In one embodiment, the functionality of the transmission means for controlling information in D2D communication can be integrated into the central processor 100. The central processing unit 100 can be configured to implement the transmission method of the control information in the D2D communication as described in Embodiment 2.
在另一个实施方式中， D2D 通信中控制信息的传输装置可以与中央处理器 100 分开配置， 例如可以将 D2D通信中控制信息的传输装置配置为与中央处理器 100连 接的芯片， 通过中央处理器的控制来实现 D2D通信中控制信息的传输装置的功能。  In another embodiment, the transmission information of the control information in the D2D communication may be configured separately from the central processing unit 100, for example, the transmission device of the control information in the D2D communication may be configured as a chip connected to the central processing unit 100, through the central processing unit. Control to implement the function of the transmission device for controlling information in D2D communication.
由上述实施例可知， 通过包含参考信号序列 /前导序列和控制信息的控制信道， D2D接收侧可以根据参考信号序列 /前导序列获得 D2D通信资源位置， 并根据 D2D 通信资源位置获得用于 D2D通信的控制信息。 由此， 可以降低 D2D通信中接收机的 解调复杂度， 减小解调时需要的缓存， 并且减少由于资源碰撞而造成的资源浪费。 实施例 5  It can be seen from the above embodiment that the D2D receiving side can obtain the D2D communication resource location according to the reference signal sequence/preamble sequence by using the control channel including the reference signal sequence/preamble sequence and the control information, and obtain the D2D communication for the D2D communication according to the D2D communication resource location. Control information. Thereby, the demodulation complexity of the receiver in D2D communication can be reduced, the buffer required for demodulation can be reduced, and resource waste due to resource collision can be reduced. Example 5
本发明实施例还提供一种通信***， 包括如实施例 3所述的用户设备和实施例 4 所述的用户设备； 与实施例 1至 4相同的内容不再赘述。  The embodiment of the present invention further provides a communication system, which includes the user equipment as described in Embodiment 3 and the user equipment described in Embodiment 4; the same contents as Embodiments 1 to 4 are not described herein.
图 25是本发明实施例的通信***的一构成示意图，如图 25所示，通信*** 2500 包括： 第一用户设备 2501和第二用户设备 2502; 其中，  25 is a schematic diagram of a configuration of a communication system according to an embodiment of the present invention. As shown in FIG. 25, the communication system 2500 includes: a first user equipment 2501 and a second user equipment 2502;
第一用户设备 2501 配置用于 D2D通信的控制信道， 所述控制信道中包括用于 D2D通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导序列； 以及 通过该控制信道发送用于 D2D通信的控制信息以及参考信号序列 /前导序列；  The first user equipment 2501 configures a control channel for D2D communication, where the control channel includes control information for D2D communication and a reference signal sequence or a preamble sequence indicating a location of the D2D communication resource; and is transmitted through the control channel for D2D Control information for communication and reference signal sequence/preamble sequence;
第二用户设备 2502接收用于 D2D通信的控制信号， 检测参考信号序列 /前导序 列以获得 D2D通信资源位置， 并根据 D2D通信资源位置获得用于 D2D通信的控制 信息。  The second user equipment 2502 receives the control signal for D2D communication, detects the reference signal sequence/preamble to obtain the D2D communication resource location, and obtains control information for D2D communication based on the D2D communication resource location.
在本实施例中，第一用户设备和第二用户设备为一对进行 D2D通信的用户设备。 第一用户设备和第二用户设备可以处于基站覆盖之下， 也可以没有基站覆盖。本发明 不限于此， 图 25以用户设备处于基站覆盖之下为例进行说明。 如图 25所示， 通信*** 2500还可以包括： 基站 2503， 配置用于 D2D通信的资 源池。 In this embodiment, the first user equipment and the second user equipment are a pair of user equipments that perform D2D communication. The first user equipment and the second user equipment may be under the coverage of the base station or may not be covered by the base station. The present invention is not limited to this, and FIG. 25 is described by taking an example in which the user equipment is under the coverage of the base station. As shown in FIG. 25, the communication system 2500 may further include: a base station 2503 configured to allocate a resource pool for D2D communication.
在本实施例中， 用于 D2D通信的控制信息被配置在靠近解调参考信号的一个或 多个资源粒子上； 以及参考信号序列或前导序列被配置在子帧的第一个 SC-FDMA或 OFDM符号上。  In this embodiment, control information for D2D communication is configured on one or more resource particles close to the demodulation reference signal; and the reference signal sequence or preamble sequence is configured in the first SC-FDMA of the subframe or On the OFDM symbol.
在本实施例中， 可以通过参考信号序列或前导序列的长度来指示 D2D通信资源 的大小或者大小范围。此外， 可以通过使用由不同根序列生成的参考信号序列或前导 序列来指示 D2D通信资源的大小， 以及通过使用不同的循环移位值来指示 D2D通信 资源的偏移值。  In this embodiment, the size or size range of the D2D communication resources may be indicated by the length of the reference signal sequence or the preamble sequence. Furthermore, the size of the D2D communication resource can be indicated by using a reference signal sequence or a preamble sequence generated by different root sequences, and the offset value of the D2D communication resource can be indicated by using a different cyclic shift value.
本发明实施例还提供一种计算机可读程序， 其中当在用户设备中执行所述程序 时， 所述程序使得计算机在所述用户设备中执行如上面实施例 1或 2所述的 D2D通 信中控制信息的传输方法。  The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes the computer to execute the D2D communication in the user equipment as described in Embodiment 1 or 2 above. Control method of transmission of information.
本发明实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可 读程序使得计算机在用户设备中执行如上面实施例 1或 2所述的 D2D通信中控制信 息的传输方法。  An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute a method for transmitting control information in D2D communication as described in Embodiment 1 or 2 above in a user equipment .
本发明以上的装置和方法可以由硬件实现， 也可以由硬件结合软件实现。 本发明 涉及这样的计算机可读程序， 当该程序被逻辑部件所执行时， 能够使该逻辑部件实现 上文所述的装置或构成部件， 或使该逻辑部件实现上文所述的各种方法或步骤。 本发 明还涉及用于存储以上程序的存储介质， 如硬盘、磁盘、光盘、 DVD、 flash存储器等。  The above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
针对附图中描述的功能方框中的一个或多个和 /或功能方框的一个或多个组合， 可以实现为用于执行本申请所描述功能的通用处理器、 数字信号处理器 （DSP)、 专 用集成电路 （ASIC)、 现场可编程门阵列 （FPGA) 或者其它可编程逻辑器件、 分立 门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方 框中的一个或多个和 /或功能方框的一个或多个组合， 还可以实现为计算设备的组合， 例如， DSP和微处理器的组合、 多个微处理器、 与 DSP通信结合的一个或多个微处 理器或者任何其它这种配置。  One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein. An application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.
以上结合具体的实施方式对本发明进行了描述， 但本领域技术人员应该清楚， 这些 描述都是示例性的， 并不是对本发明保护范围的限制。 本领域技术人员可以根据本发明 的精神和原理对本发明做出各种变型和修改， 这些变型和修改也在本发明的范围内。  The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that these descriptions are illustrative and not restrictive. A person skilled in the art can make various modifications and changes to the present invention in accordance with the spirit and the principles of the present invention. These modifications and modifications are also within the scope of the present invention.

Claims

权利 要求书 claims
1、 一种 D2D通信中控制信息的传输装置， 所述传输装置包括： 1. A transmission device for control information in D2D communication, the transmission device includes:
信道配置单元， 配置用于 D2D通信的控制信道， 所述控制信道中包括用于 D2D 通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导序列； Channel configuration unit, configures a control channel for D2D communication, the control channel includes control information for D2D communication and a reference signal sequence or preamble sequence indicating the location of the D2D communication resource;
信息发送单元， 通过所述控制信道发送所述用于 D2D通信的控制信息以及所述 参考信号序列或前导序列。 An information sending unit, transmits the control information for D2D communication and the reference signal sequence or preamble sequence through the control channel.
2、 根据权利要求 1所述的传输装置， 其中， 所述用于 D2D通信的控制信息被配 置在靠近解调参考信号的一个或多个资源粒子上； 以及所述参考信号序列或前导序列 被配置在子帧的第一个 SC-FDMA或 OFDM符号上。 2. The transmission device according to claim 1, wherein the control information for D2D communication is configured on one or more resource elements close to the demodulation reference signal; and the reference signal sequence or preamble sequence is Configured on the first SC-FDMA or OFDM symbol of the subframe.
3、 根据权利要求 1所述的传输装置， 其中， 所述传输装置还包括： 3. The transmission device according to claim 1, wherein the transmission device further includes:
资源选择单元， 在基站侧配置的资源池中或者在预设的资源池中选择所述 D2D 通信资源。 The resource selection unit selects the D2D communication resource in a resource pool configured on the base station side or in a preset resource pool.
4、 根据权利要求 1所述的传输装置， 其中， 所述传输装置还包括： 4. The transmission device according to claim 1, wherein the transmission device further includes:
序列生成单元， 生成所述参考信号序列或前导序列； 其中通过所述参考信号序列 或前导序列的长度来指示所述 D2D通信资源的大小或者大小范围。 A sequence generation unit, generates the reference signal sequence or preamble sequence; wherein the size or size range of the D2D communication resource is indicated by the length of the reference signal sequence or preamble sequence.
5、 根据权利要求 4所述的传输装置， 其中， 通过使用由不同根序列生成的所述 参考信号序列或前导序列来指示所述 D2D通信资源的大小， 以及通过使用不同的循 环移位值来指示所述 D2D通信资源的偏移值。 5. The transmission device according to claim 4, wherein the size of the D2D communication resource is indicated by using the reference signal sequence or the preamble sequence generated by different root sequences, and by using different cyclic shift values. Indicates the offset value of the D2D communication resource.
6、 根据权利要求 4所述的传输装置， 其中， 所述参考信号序列或前导序列为探 测参考信号序列， 或者解调参考信号序列， 或者其他的 ZC序列。 6. The transmission device according to claim 4, wherein the reference signal sequence or preamble sequence is a detection reference signal sequence, a demodulation reference signal sequence, or other ZC sequence.
7、 根据权利要求 1所述的传输装置， 其中， 所述传输装置还包括： 7. The transmission device according to claim 1, wherein the transmission device further includes:
信息生成单元， 生成所述用于 D2D通信的控制信息。 An information generation unit generates the control information for D2D communication.
8、 根据权利要求 7所述的传输装置， 其中， 所述控制信息包括如下信息的一种 或任意组合： 调制编码方案信息、 新数据指示信息和冗余版本信息。 8. The transmission device according to claim 7, wherein the control information includes one or any combination of the following information: modulation and coding scheme information, new data indication information and redundant version information.
9、 根据权利要求 7所述的传输装置， 其中， 所述信息生成单元使用固定的码率 进行编码， 或者根据信号质量信息采用不同的码率进行编码。 9. The transmission device according to claim 7, wherein the information generation unit uses a fixed code rate for encoding, or uses different code rates for encoding according to the signal quality information.
10、 根据权利要求 7所述的传输装置， 其中， 所述信道配置单元还用于将所述用 于 D2D通信的控制信息映射到解调参考信号两侧符号的一个或多个资源粒子上， 或 者所述解调参考信号任意一侧符号的一个或多个资源粒子上。 10. The transmission device according to claim 7, wherein the channel configuration unit is further configured to map the control information for D2D communication to one or more resource elements of symbols on both sides of the demodulation reference signal, or or on one or more resource elements of symbols on either side of the demodulation reference signal.
11、 一种 D2D通信中控制信息的传输装置， 所述传输装置包括： 11. A transmission device for control information in D2D communication, the transmission device includes:
信息接收单元， 接收用于 D2D通信的控制信号， 发送所述控制信号的控制信道 中包括用于 D2D通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导 序列； The information receiving unit receives a control signal used for D2D communication, and the control channel sending the control signal includes control information used for D2D communication and a reference signal sequence or preamble sequence indicating the location of the D2D communication resource;
信息检测单元， 检测所述参考信号序列或前导序列以获得所述 D2D通信资源位 置， 并根据所述 D2D通信资源位置获得所述用于 D2D通信的控制信息。 An information detection unit detects the reference signal sequence or preamble sequence to obtain the D2D communication resource location, and obtains the control information for D2D communication according to the D2D communication resource location.
12、 根据权利要求 11所述的传输装置， 其中， 所述用于 D2D通信的控制信息被 配置在靠近解调参考信号的一个或多个资源粒子上； 以及所述参考信号序列或前导序 列被配置在子帧的第一个 SC-FDMA或 OFDM符号上。 12. The transmission device according to claim 11, wherein the control information for D2D communication is configured on one or more resource elements close to the demodulation reference signal; and the reference signal sequence or preamble sequence is Configured on the first SC-FDMA or OFDM symbol of the subframe.
13、 根据权利要求 11所述的传输装置， 其中， 通过所述参考信号序列或前导序 列的长度来指示所述 D2D通信资源的大小或者大小范围。 13. The transmission device according to claim 11, wherein the size or size range of the D2D communication resource is indicated by the length of the reference signal sequence or preamble sequence.
14、 根据权利要求 13所述的传输装置， 其中， 通过使用由不同根序列生成的所 述参考信号序列或前导序列来指示所述 D2D通信资源的大小， 以及通过使用不同的 循环移位值来指示所述 D2D通信资源的偏移值。 14. The transmission device according to claim 13, wherein the size of the D2D communication resource is indicated by using the reference signal sequence or the preamble sequence generated by different root sequences, and by using different cyclic shift values. Indicates the offset value of the D2D communication resource.
15、 根据权利要求 13所述的传输装置， 其中， 将不同长度的所述参考信号序列 或前导序列构成的搜索空间划分为公共搜索空间和用户搜索空间； 15. The transmission device according to claim 13, wherein the search space composed of the reference signal sequence or preamble sequence of different lengths is divided into a public search space and a user search space;
所述信息检测单元检测所述公共搜索空间以获取用于 D2D广播或组播通信的资 源位置， 以及检测所述用户搜索空间以获取用于 D2D单播通信的资源位置。 The information detection unit detects the public search space to obtain resource locations for D2D broadcast or multicast communication, and detects the user search space to obtain resource locations for D2D unicast communication.
16、 一种通信***， 所述通信***包括： 16. A communication system, the communication system includes:
第一用户设备， 配置用于 D2D通信的控制信道， 所述控制信道中包括用于 D2D 通信的控制信息以及指示 D2D通信资源位置的参考信号序列或前导序列； 以及通过 所述控制信道发送所述用于 D2D 通信的控制信息以及所述参考信号序列或前导序 列； The first user equipment configures a control channel for D2D communication, the control channel includes control information for D2D communication and a reference signal sequence or preamble sequence indicating the location of the D2D communication resource; and sends the control channel through the control channel. Control information for D2D communication and the reference signal sequence or preamble sequence;
第二用户设备， 接收用于 D2D通信的控制信号， 检测所述参考信号序列或前导 序列以获得所述 D2D通信资源位置， 并根据所述 D2D通信资源位置获得所述用于 D2D通信的控制信息。 The second user equipment receives a control signal for D2D communication, detects the reference signal sequence or preamble sequence to obtain the D2D communication resource location, and obtains the control information for D2D communication according to the D2D communication resource location. .
17、 根据权利要求 16所述的通信***， 其中， 所述通信***还包括： 基站， 配置用于 D2D通信的资源池。 17. The communication system according to claim 16, wherein the communication system further includes: a base station configured to configure a resource pool for D2D communication.
18、 根据权利要求 16所述的通信***， 其中， 所述用于 D2D通信的控制信息被 配置在靠近解调参考信号的一个或多个资源粒子上； 以及所述参考信号序列或前导序 列被配置在子帧的第一个 SC-FDMA或 OFDM符号上。 18. The communication system according to claim 16, wherein the control information for D2D communication is configured on one or more resource elements close to the demodulation reference signal; and the reference signal sequence or preamble sequence is Configured on the first SC-FDMA or OFDM symbol of the subframe.
19、 根据权利要求 16所述的通信***， 其中， 通过所述参考信号序列或前导序 列的长度来指示所述 D2D通信资源的大小或者大小范围。 19. The communication system according to claim 16, wherein the size or size range of the D2D communication resource is indicated by the length of the reference signal sequence or preamble sequence.
20、 根据权利要求 16所述的通信***， 其中， 通过使用由不同根序列生成的所 述参考信号序列或前导序列来指示所述 D2D通信资源的大小， 以及通过使用不同的 循环移位值来指示所述 D2D通信资源的偏移值。 20. The communication system according to claim 16, wherein the size of the D2D communication resource is indicated by using the reference signal sequence or preamble sequence generated by different root sequences, and by using different cyclic shift values. Indicates the offset value of the D2D communication resource.
PCT/CN2014/071652 2014-01-28 2014-01-28 Control information transmission method in d2d communication, apparatus and communication system WO2015113198A1 (en)

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