WO2013127344A1 - Procédé de communication sans fil et dispositif de communication sans fil - Google Patents

Procédé de communication sans fil et dispositif de communication sans fil Download PDF

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Publication number
WO2013127344A1
WO2013127344A1 PCT/CN2013/071963 CN2013071963W WO2013127344A1 WO 2013127344 A1 WO2013127344 A1 WO 2013127344A1 CN 2013071963 W CN2013071963 W CN 2013071963W WO 2013127344 A1 WO2013127344 A1 WO 2013127344A1
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WIPO (PCT)
Prior art keywords
communication
authorization information
subframe
user equipment
dedicated
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PCT/CN2013/071963
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English (en)
Chinese (zh)
Inventor
吴栓栓
梁枫
戴博
袁明
袁弋非
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中兴通讯股份有限公司
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Publication of WO2013127344A1 publication Critical patent/WO2013127344A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of wireless communications, and in particular to a communication method and apparatus in a wireless communication system in which cellular communication and device-to-device communication coexist.
  • D2D Device-to-Device
  • the service data is directly transmitted between the UEs, so the communication method cannot follow the traditional cellular communication method.
  • the system is more complicated due to the increased support for D2D communication in cellular communication systems.
  • the UE while performing D2D communication, there may also be cellular transmission with the network side. Therefore, how to properly schedule and authorize the transmission of cellular service data and D2D service data is a problem faced by D2D research. Summary of the invention
  • the technical problem to be solved by the solution is to provide a wireless communication method and device, which solves the problem of control signaling transmission and scheduling when cellular communication and D2D communication coexist.
  • the present invention provides a wireless communication method, wherein authorization information is identified by at least one of the following parameters: a radio network temporary identifier (RNTI), a subframe type, and a link identifier indication signaling.
  • the above method may also have the following features:
  • the above method may also have the following features:
  • the type of frame distinguishes between device-to-device communication and cellular communication, and the types of the subframe include a dedicated subframe and a normal subframe.
  • the above method may also have the following features:
  • the identifier bit is used as the link identifier indication signaling, and the different states of the identifier bit are respectively used to indicate device-to-device communication and cellular communication; the user equipment passes The identification bits distinguish device to device communication and cellular communication.
  • the above method may also have the following features:
  • the above method may also have the following features:
  • the dedicated search space is used for device-to-device communication authorization information transmission; or, a dedicated search space is allocated in a cellular communication downlink control channel search space, the dedicated The search space is used for device-to-device communication transfer of authorization information; the user device distinguishes device-to-device communication and cellular communication by a search space that transmits the authorization information.
  • the above method may also have the following features:
  • a dedicated frequency domain resource is allocated for device-to-device communication, and the user equipment distinguishes device-to-device communication and cellular communication by the location of the frequency domain resource indicated by the authorization information.
  • the above method may also have the following features:
  • Allocating two devices to a device communication-specific RNTI for identifying authorization information indicating that the user equipment is transmitting device-to-device communication and authorization for indicating that the user equipment is performing device-to-device communication Information The user equipment distinguishes the device-to-device communication transmission and the device-to-device communication reception by the device-to-device communication-specific RNTI that identifies the authorization information.
  • the above method may also have the following features:
  • the device-to-device communication-specific subframe includes a receiving subframe and a transmitting subframe; the receiving subframe is used by the user equipment to receive device-to-device communication data transmission, the sending The subframe is used for data transmission of the device to device communication by the user equipment; the user equipment distinguishes the device-to-device communication transmission and the device-to-device communication reception by using the detected subframe type associated with the authorization information,
  • the subframe type includes a reception subframe and a transmission subframe.
  • the above method may also have the following features:
  • the two dedicated authorization information formats are respectively used for scheduling device-to-device communication reception and scheduling device-to-device communication transmission; the user equipment passes detection
  • the format of the authorization information that is obtained distinguishes between device-to-device communication transmission and device-to-device communication reception.
  • the above method may also have the following features: Setting an identifier bit in the authorization information for the device-to-device communication, where the identifier bit as the link identifier indication signaling includes at least two states, where the two states are respectively used to indicate device-to-device communication.
  • the above method may also have the following features:
  • the identifier bit as the link identifier indication signaling includes at least three states, where the three states are respectively used to indicate device-to-device communication reception, and device-to-device communication transmission, Transmission of cellular communication; the user equipment distinguishes the device-to-device communication reception, the device-to-device communication transmission, and the cellular communication transmission by the identification bit.
  • the present invention further provides a wireless communication device, wherein the wireless communication device includes an authorization information detecting module and a communication behavior decision module;
  • the authorization information detecting module is configured to: detect authorization information
  • the communication behavior decision module is configured to: determine a communication behavior according to a combination of one or more of the following parameters: a temporary identifier of the wireless network that identifies the authorization information, a subframe type to which the authorization information is associated, The link identifier indication signaling in the authorization information, the format of the authorization information, the search space of the authorization information, and the frequency domain resource location indicated by the resource allocation parameter in the authorization information;
  • the communication behavior includes part or all of the following: receiving device-to-device communication, transmitting device-to-device communication, receiving cellular communication, and transmitting cellular communication.
  • the above wireless communication device may further have the following features:
  • the decision of the communication behavior decision module further includes one of the following ways: distinguishing device-to-device communication and cellular communication by the wireless network temporary identification of the authorization information, and the device-to-device communication authorization information is identified by using a dedicated RNTI ;
  • Device-to-device communication and cellular communication are distinguished by a type of a subframe to which the authorization information is associated, the subframe type including at least a dedicated subframe and a normal subframe, the dedicated subframe being different from a normal subframe for cellular communication a frame, the dedicated subframe is used for device-to-device communication;
  • the identification is used to indicate device-to-device communication and cellular communication respectively by setting different states;
  • the format of the authorization information includes at least a dedicated authorization information format and a normal authorization information format, where the dedicated authorization information format is different from that used for cellular communication authorization information transmission.
  • Ordinary authorization information format used for device-to-device communication authorization information transmission;
  • the search space Separating device-to-device communication and cellular communication by a search space transmitting the authorization information, the search space including at least a dedicated search space for device-to-device communication authorization information transmission and a search space for transmission of cellular communication authorization information, the dedicated The search space is used for the transmission of authorization information for device-to-device communication;
  • the above wireless communication device may further have the following features:
  • the decision of the communication behavior decision module further includes one of the following ways:
  • the device-to-device communication-specific RNTI is used to identify the device-to-device communication and the device-to-device communication, and the device-to-device communication-specific RNTI includes at least two, which are respectively used to identify the user device.
  • Distinguishing device-to-device communication transmission and device-to-device communication reception by the detected subframe type associated with the authorization information where the subframe type includes at least a device-to-device communication-dedicated subframe and a normal subframe, where the device The device communication-dedicated subframe includes a receiving subframe and a transmitting subframe, where the receiving subframe is used by the user equipment to receive device-to-device communication data transmission, and the sending subframe is used by the user equipment to send device-to-device communication Data
  • At least two dedicated authorization information formats are used for device-to-device communication scheduling, and the two dedicated authorization information formats are respectively Transmission of authorization information for indicating device-to-device communication and for indicating device-to-device communication; Separating device-to-device communication and device-to-device communication by using the identifier bit in the authorization information, where the identifier bit as the link identifier indication signaling includes at least two states, where the two states are respectively used For indicating device-to-device communication reception and device-to-device communication transmission.
  • the above wireless communication device may further have the following features:
  • the identifier bit as the link identifier indication signaling includes at least three states, where the three states are respectively used to indicate device-to-device communication reception, and device-to-device communication Send, send of cellular communication;
  • the communication behavior decision module distinguishes, by the identifier bit, device-to-device communication reception, device-to-device communication transmission, and cellular communication transmission.
  • the present invention also provides a wireless communication apparatus, wherein the wireless communication apparatus includes at least one of a transmitting module for transmitting authorization information to a user equipment, and the following modules:
  • a wireless network temporary identity allocation module configured to: allocate a dedicated wireless network temporary identifier, the private wireless network temporary identifier identifying an authorization information used for device-to-device communication;
  • a subframe allocation module configured to: allocate a dedicated subframe, which is different from a normal subframe used for cellular communication, for device-to-device communication;
  • a link identifier indicating signaling setting module configured to: set link identifier indication signaling in the authorization information, where different states of the link identifier indication signaling are respectively used to indicate device-to-device communication and cellular communication; or The different states of the link identifier indication signaling are respectively used to indicate device-to-device communication reception and transmission; or the link identifier indication signaling different states are respectively used to indicate device-to-device communication reception, the device Transmission to device communication, transmission of cellular communication; authorization information format determining module, configured to: determine a format of the authorization information to be transmitted, the format including a cellular communication authorization information format and a dedicated authorization information format, the dedicated authorization The information format is different from the cellular communication authorization information format, and the authorization information transmission is used for device-to-device communication; the search space determining module is configured to: determine a search space of the authorization information to be transmitted, where the search space includes cellular communication authorization information Transmitted search space and dedicated search space Use the search space for device-to-device communication authorization information transmission
  • a dedicated resource configuration module configured to: allocate a dedicated frequency domain resource, where the dedicated frequency domain resource is used Device-to-device communication;
  • the authorization information is identified by at least one of the following parameters: the wireless network temporary identifier, the subframe type associated with the authorization information, the link identifier indication signaling, the format of the authorization information, the search Space, the frequency domain resource location allocated by the resource allocation parameter in the authorization information.
  • the authorization information is identified by at least one of the following information: a temporary identifier of the wireless network, a subframe type, a link identifier indication signaling, an authorization information format, a search space, and a frequency domain resource location indicated by the resource allocation parameter in the authorization information. And determining, by the user equipment that is used to detect the authorization information, a response after detecting the authorization information;
  • the response includes part or all of the following: the user equipment performs device-to-device communication, the user equipment performs device-to-device communication, the user equipment performs cellular communication, and the user equipment performs cellular Transmission of communication;
  • the response includes part or all of the following:
  • the user equipment performs device-to-device communication, and the user equipment performs cellular communication.
  • the above-mentioned wireless communication method and apparatus solve the problem of control signaling transmission and scheduling in the coexistence of cellular communication and D2D communication, avoiding interference of cellular communication and D2D communication, and ensuring efficiency and reliability of D2D communication.
  • 1 is a schematic diagram of cellular communication when two UEs are located in the same base station cell
  • Figure 2 is a schematic diagram of D2D communication
  • FIG. 3 is a schematic structural diagram of a wireless communication device
  • FIG. 4 is a schematic diagram of a frame structure of an LTE/LTE-A system
  • FIG. 5 is a schematic diagram of resource structure of a physical resource block of an LTE/LTE-A system.
  • a user equipment performing D2D communication may simultaneously need to perform data interaction with the network side, for example, receiving data transmitted by a network node, or transmitting data to a network node.
  • the user equipment needs to identify the behavior of the network side, for example, the network side sends the authorization information, and the user equipment needs to detect the authorization information. Determining whether the authorization information is for cellular communication or device-to-device communication, thereby responding based on the authorization information, for example, receiving or transmitting cellular communication based on the authorization information, or performing data reception or transmission of device-to-device communication .
  • the user equipment For device-to-device communication, there is also an identification problem of receiving and transmitting.
  • the user equipment detects the authorization information used for device-to-device communication, it needs to determine whether the authorization information is to schedule the user equipment to send, or to schedule the user.
  • the device receives it.
  • a wireless communication device on the terminal side includes:
  • An authorization information detecting module configured to detect authorization information
  • a communication behavior decision module configured to determine a behavior of communication according to a combination of one or more of the following parameters: a Radio Network Temporary Index (RNTI) that identifies the authorization information, where the authorization information is associated a subframe type, a link identifier indication signaling in the authorization information, a format of the authorization information, a search space of the authorization information, and a frequency domain resource location indicated by a resource allocation parameter in the authorization information;
  • the communication behavior includes part or all of the following: receiving device-to-device communication, transmitting device-to-device communication, receiving cellular communication, and transmitting cellular communication.
  • the decision of the communication behavior decision module further includes one of the following ways:
  • Device-to-device communication and cellular communication are distinguished by a type of a subframe to which the authorization information is associated, the subframe type including at least a dedicated subframe and a normal subframe, the dedicated subframe being different from a normal subframe for cellular communication a frame, the dedicated subframe is used for device-to-device communication; Distinguishing device-to-device communication and cellular communication by the identifier bit in the authorization information, where the identifier bit is used as the link identifier indication signaling, and is used to indicate device-to-device communication and cellular communication respectively by setting different states;
  • the format of the authorization information includes at least a dedicated authorization information format and a normal authorization information format, where the dedicated authorization information format is different from that used for cellular communication authorization information transmission.
  • Ordinary authorization information format used for device-to-device communication authorization information transmission;
  • the search space Separating device-to-device communication and cellular communication by a search space transmitting the authorization information, the search space including at least a dedicated search space for device-to-device communication authorization information transmission and a search space for transmission of cellular communication authorization information, the dedicated The search space is used for the transmission of authorization information for device-to-device communication;
  • the device-to-device communication and the cellular communication are distinguished by the location of the frequency domain resource indicated by the resource allocation parameter in the authorization information, that is, the system allocates a dedicated frequency domain resource for the device-to-device communication, and the frequency indicated by the parameter in the authorization information
  • the location relationship between the domain resource and the dedicated frequency domain resource distinguishes between device-to-device communication and cellular communication.
  • the decision of the communication behavior decision module further includes one of the following ways:
  • the device-to-device communication-specific RNTI is configured to detect the device-to-device communication and the device-to-device communication, and the device-to-device communication-specific RNTI includes at least two Authorization information for transmitting device-to-device communication and authorization information for indicating that the user device performs device-to-device communication;
  • Distinguishing device-to-device communication transmission and device-to-device communication reception by the detected subframe type associated with the authorization information where the subframe type includes at least a device-to-device communication-dedicated subframe and a normal subframe, where the device The device communication-dedicated subframe includes a receiving subframe and a transmitting subframe, where the receiving subframe is used by the user equipment to receive device-to-device communication data transmission, and the sending subframe is used by the user equipment to send device-to-device communication Data
  • At least two dedicated authorization information formats are used for device-to-device communication, and the two dedicated authorization information formats are respectively used for Receiving device-to-device communication reception and authorization information transmission indicating device-to-device communication transmission; Separating device-to-device communication and device-to-device communication by using the identifier bit in the authorization information, where the identifier bit as the link identifier indication signaling includes at least two states, where the two states are respectively used For indicating device-to-device communication reception and device-to-device communication transmission.
  • the terminal side device may further set an identifier bit in the authorization information, where the identifier bit as the link identifier indication signaling includes at least three states, where the three states are respectively used to indicate device-to-device communication reception.
  • a wireless communication device on the network side is also provided.
  • the device includes at least one of the following modules:
  • a wireless network temporary identifier allocation module configured to allocate a private wireless network temporary identifier, where the special wireless network temporary identifier is different from a wireless network temporary identifier allocated by the network for cellular communication, and an identifier of the authorization information used for device-to-device communication;
  • a subframe allocation module configured to allocate a dedicated subframe, where the dedicated subframe is different from a normal subframe used for cellular communication, and is used for device-to-device communication;
  • a link identifier indication signaling setting module configured to set link identifier indication signaling in the authorization information, where different states of the link identifier indication signaling are respectively used to indicate device-to-device communication and cellular communication; or The different states of the link identifier indicating signaling are respectively used to indicate device-to-device communication receiving and transmitting; or the link identifier indicating signaling different states are respectively used to indicate device-to-device communication receiving, and the device is Transmission of device communication, transmission of cellular communication;
  • an authorization information format determining module configured to determine a format of the authorization information to be transmitted, where the format includes a cellular communication authorization information format and a special authorization information format, where the special authorization information format is different from the cellular communication authorization information format, and is used for a device-to-device communication authorization information transmission;
  • a search space determining module configured to determine a search space of the authorization information to be transmitted, the search space includes a cellular communication authorization information transmission search space and a dedicated search space, the dedicated search space Used for device-to-device communication authorization information transmission;
  • a dedicated resource configuration module configured to allocate a dedicated frequency domain resource, where the dedicated frequency domain resource is used for setting Prepare to device communication
  • the authorization information is identified by at least one of the following parameters: the wireless network temporary identifier, the subframe type associated with the authorization information, the link identifier indication signaling, the format of the authorization information, the search Space, the frequency domain resource location indicated by the resource allocation parameter in the authorization information.
  • An embodiment of the present invention further provides a wireless communication method, where
  • the authorization information is identified by at least one of the following information: a radio network temporary identifier (RNTI), a subframe type, a link identifier indication signaling, an authorization information format, a search space, and a frequency indicated by a resource allocation parameter in the authorization information.
  • RNTI radio network temporary identifier
  • subframe type a subframe type
  • link identifier indication signaling an authorization information format
  • search space a search space
  • frequency indicated by a resource allocation parameter in the authorization information a frequency indicated by a resource allocation parameter in the authorization information.
  • the response includes part or all of the following: the user equipment performs device-to-device communication, the user equipment performs device-to-device communication, the user equipment performs cellular communication, and the user equipment performs cellular Transmission of communication;
  • the response includes part or all of the following:
  • the user equipment performs device-to-device communication, and the user equipment performs cellular communication.
  • a wireless communication method comprising: identifying an authorization information by at least one of the following parameters: a radio network temporary identifier (RNTI), a subframe type, a link The identifier indication signaling, the authorization information format, the search space, and the frequency domain resource location indicated by the resource allocation parameter in the authorization information; the user equipment that is used to detect the authorization information determines the response after detecting the authorization information, The response includes part or all of the following: the user equipment performs device-to-device communication, the user equipment performs device-to-device communication, the user equipment performs cellular communication, and the user equipment performs cellular The transmission of communication.
  • RNTI radio network temporary identifier
  • the type of frame distinguishes between device-to-device communication and cellular communication, and the types of the subframe include a dedicated subframe and a normal subframe.
  • the identifier bit is used as the link identifier indication signaling, and the different states of the identifier bit are respectively used to indicate device-to-device communication and cellular communication; the user equipment passes The different states of the identification bits distinguish device-to-device communication from cellular communication.
  • the dedicated authorization information format is used for device-to-device communication authorization information transmission; the user equipment distinguishes device-to-device communication and cellular communication by the format of the authorization information .
  • a dedicated search space is used for transmission of device-to-device communication authorization information; the user device distinguishes device-to-device communication and cellular communication by a search space that transmits the authorization information.
  • a dedicated frequency domain resource is allocated for device-to-device communication, and the user equipment distinguishes device-to-device communication and cellular communication by the location of the frequency domain resource indicated by the resource allocation parameter in the authorization information.
  • the reception and transmission of D2D can be distinguished by one of the following methods:
  • Allocating two devices to a device communication-specific RNTI for identifying authorization information indicating that the user equipment is transmitting device-to-device communication and authorization for indicating that the user equipment is performing device-to-device communication Information The user equipment distinguishes the device-to-device communication transmission and the device-to-device communication reception according to the device-to-device communication-specific RNTI that detects the authorization information.
  • the device-to-device communication-specific subframe includes a receiving subframe and a transmitting subframe; the receiving subframe is used by the user equipment to receive device-to-device communication data transmission, the sending The subframe is used by the user equipment to send device-to-device communication data; the user equipment distinguishes between device-to-device communication transmission and device-to-device communication according to the subframe type associated with the detected authorization information, the subframe Types include a receive subframe and a transmit subframe.
  • the device-to-device communication transmission and the device-to-device communication reception are distinguished according to the detected format of the authorization information.
  • the identifier bit as the link identifier indication signaling includes at least two states, where the two states are respectively used to indicate device-to-device communication reception and The device-to-device communication is sent; when the user equipment detects the device-to-device communication authorization information, the device-to-device communication transmission and device-to-device communication are identified according to the status of the identification bit in the authorization information. receive.
  • the identifier bit as the link identifier indication signaling includes at least three states, the three states respectively for receiving device-to-device communication, device-to-device communication, and cellular communication
  • the user equipment distinguishes the device-to-device communication reception, the device-to-device communication transmission, and the cellular communication transmission by the identification bit.
  • 3GPP 3rd Generation Partnership
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-A
  • the LTE/LTE-A system downlink is based on Orthogonal Frequency Division Multiplexing (OFDM) technology, and the uplink uses SC-FDMA (Single Carrier-Frequency Division Multiplexing Access) multiple access. the way.
  • OFDM/SC-FDM systems communication resources are in the form of time-frequency two-dimensional.
  • the communication resources of the uplink and the downlink are all divided in units of frames in the time direction, and each radio frame (radio) Frame ) has a length of 10 ms.
  • Each frame contains 10 sub-frames of length 1 ms.
  • Each subframe contains two slots of 0.5 ms in length.
  • each time slot includes 7 or 6 OFDM/SC-FDM symbols, where 7 and 6 correspond to the normal cyclic prefix (Normal CP) and the extended cyclic prefix respectively.
  • Extended CP is 7 or 6 OFDM/SC-FDM symbols, where 7 and 6 correspond to the normal cyclic prefix (Normal CP) and the
  • the LTE/LTE-A system is divided into two modes: Time-Division Duplex (TDD) system and Frequency-Division (Frequency-Division).
  • Duplex referred to as FDD
  • the FDD system uses two frequency bands for signal transmission on the downlink (network side to terminal) and uplink (terminal to network side), and the corresponding time-frequency resources are respectively referred to as downlink subframe and uplink subframe; TDD system
  • TDD system The use of one frequency band for both uplink and downlink signal transmission enables multiplexing of two links by allocating uplink and downlink signal transmissions at different times.
  • the TDD system supports 7 seed frame uplink-downlink configuration according to the ratio of the number of uplink and downlink subframes, as shown in Table 1.
  • D represents a downlink subframe
  • U represents an uplink subframe
  • S represents a special subframe.
  • the S subframe includes a Downlink Pilot Time Slot (DwPTS for short), an Uplink Pilot Time Slot (UpPTS for short), and a Guard Period (GP) for transition between uplink and downlink.
  • DwPTS Downlink Pilot Time Slot
  • UpPTS Uplink Pilot Time Slot
  • GP Guard Period
  • the communication resources of the uplink and the downlink are divided into subcarriers.
  • the smallest unit of resource allocation is a resource block (RB), which corresponds to a physical resource.
  • a physical resource block (Physical RB, abbreviated as PRB).
  • PRB Physical RB, abbreviated as PRB.
  • one PRB includes 12 subcarriers in the frequency domain, and 12 subcarriers correspond to one time slot in the time domain.
  • a resource corresponding to one subcarrier on each OFDM/SC-FDMA symbol is called a Resource Element (RE).
  • RE Resource Element
  • service data is transmitted in a downlink shared channel (DL-SCH, Downlink Shared Channel) and an uplink shared channel (UL-SCH, Uplink Shared Channel), corresponding to physical downlink sharing of the physical layer.
  • DL-SCH Downlink Shared Channel
  • UL-SCH Uplink Shared Channel
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • authorization information is required for indication, and the content of the indication includes resource allocation location, modulation and coding mode, power control information, and information related to Multi-In Multi-Out.
  • the above-mentioned authorization information is transmitted in the form of DCI (Downlink Control Information) through a Physical Downlink Control Channel (PDCCH).
  • DCI Downlink Control Information
  • the device-to-device communication and cellular communication authorization information can be temporarily identified by the wireless network.
  • the network side allocates a C-RNTI (Cell-RNTI, Cellular Radio Network Temporary Identity), and the authorization information of the cellular communication generally uses the C-RNTI.
  • C-RNTI Cell-RNTI, Cellular Radio Network Temporary Identity
  • the C-RNTI mentioned here also includes a temporary C-RNTI (Temporary C-RNTI) and a semi-persistent scheduling C-RNT (SPS-C-RNTI, Semi-Persistent Scheduling-C-RNTI).
  • Differentiating device-to-device communication and cellular communication by RNTI means that, in addition to the C-RNTI described above, the network side allocates a D2D-dedicated RNTI to the user equipment, and the device-to-device communication authorization information uses the dedicated RNTI identifier.
  • the user equipment determines whether to perform cellular communication transmission/reception or D2D communication transmission/reception according to the identification information.
  • Device-to-device communication and cellular communication can be identified by subframe type.
  • the user equipment that is device-to-device communication is allocated a dedicated subframe, and the user equipment determines, according to the type of subframe associated with the detected authorization information, that it detects the response of the authorization information, that is, the detected authorization information is used.
  • the subframe types described herein include dedicated subframes and normal subframes, dedicated subframes for device-to-device communication, and normal subframes for cellular communication.
  • the associated subframe refers to a subframe in which the service data scheduled by the authorization information is transmitted or received.
  • 3GPP related agreement An identifier bit may be set in the authorization information, where the identifier bit is used as the link identifier indication signaling, and the device-to-device communication and the cellular communication are respectively represented by setting different states; the user equipment passes the identifier bit Different states distinguish device-to-device communication from cellular communication.
  • At least two states are set by different values of the flag, the two states representing device-to-device communication and cellular communication, respectively.
  • the identifier bit may be optional signaling, and only appears in the authorization information after the user equipment supports D2D communication or enters the D2D communication mode.
  • Device-to-device communication and cellular communication can be identified by an authorization format. That is, a new authorization format different from the DCI format (Downlink Control Information Format) used in cellular communication is set, and the new authorization format is used for device-to-device communication scheduling.
  • the user equipment detects the authorization information sent by the network side, it can determine whether the authorization information is used to schedule device-to-device communication or schedule cellular communication according to the format of the authorization information.
  • Device-to-device communication and cellular communication can be distinguished by the control channel's search space. That is, the search space for device-to-device communication authorization information detected for D2D communication in the system is different from the search space allocated for cellular communication.
  • the downlink control channel candidate set to be monitored is distinguished according to the search space, wherein the search space includes a common search space and a UE-specific search space.
  • a new search space can be set, such as a D2D dedicated search space, and the authorization information of the D2D communication is transmitted only in the D2D dedicated search space.
  • the method for setting a new search space may be: for a user equipment supporting D2D communication, adding a D2D dedicated search space after a common search space and a user-specific search space, and a user equipment supporting D2D communication detecting D2D communication in the D2D dedicated search space.
  • Authorization information for a user equipment supporting D2D communication, adding a D2D dedicated search space after a common search space and a user-specific search space, and a user equipment supporting D2D communication detecting D2D communication in the D2D dedicated search space.
  • the new search space may be located in an enhanced physical downlink control channel (E-PDCCH) resource, that is, the user equipment supporting the D2D communication detects the authorization information of the cellular communication in the PDCCH region, and detects the D2D in the E-PDCCH region.
  • E-PDCCH enhanced physical downlink control channel
  • a part of the transmission of authorization information for D2D communication is divided in a common or dedicated search space of the cellular communication control channel, such as defining an odd-numbered search space in a dedicated search space of the D2D UE.
  • the authorization information may be determined to be used for scheduling D2D communication.
  • the authorization information is only transmitted in the public search space when the cellular communication is agreed, the dedicated search space is used to transmit the authorization information of the D2D communication; or the cellular communication is agreed
  • the authorization information is only transmitted in the transfer search space, and the common search space is used to transmit the authorization information of the D2D communication.
  • the user equipment can distinguish whether the authorization information is used for scheduling cellular communication or D2D communication according to the search space in which the detected authorization information is located.
  • the device-to-device communication-dedicated RNTI may also be allocated to the user, and the authorization information of the D2D communication is identified by using the dedicated RNTI, and the blind decoding control channel of the user equipment may be reduced.
  • the complexity of time For example, when the dedicated search space is used to transmit the authorization information of the D2D communication, the authorization information uses the D2D communication-dedicated RNTI identifier, thereby avoiding the increase in the complexity of blind detection of the user equipment caused by the introduction of the D2D communication function.
  • the device-to-device communication and cellular communication can be identified by the frequency domain resource location indicated by the Resource Allocation (RA) parameter in the authorization information.
  • RA Resource Allocation
  • the network allocates dedicated frequency domain resources for D2D communication (for example, allocates some resource blocks for D2D communication), and after detecting the authorization information, the user equipment determines the location of the frequency domain resource indicated by the RA parameter in the authorization information. It is determined whether the authorization information is used to schedule device-to-device communication or to schedule cellular communication.
  • the criterion for determining may be that when the resource block location allocated by the RA parameter is located in the dedicated frequency domain resource allocated by the network for D2D communication, it is determined that the authorization information is used to schedule device-to-device communication, otherwise the authorization information is used to schedule the cell.
  • the resource block initial position allocated by the RA parameter is located in the dedicated frequency domain resource allocated by the network for D2D communication, it is determined that the authorization information is used to schedule device-to-device communication, otherwise the authorization information is used to schedule the cell.
  • the network may allocate D2D-dedicated frequency domain resources to the user equipment through higher layer signaling, such as RRC signaling.
  • the authorization information is identified by a radio network temporary identifier (RNTI), and after detecting the authorization information, the user equipment determines, according to the RNTI, a response after detecting the authorization information, where the response includes the user.
  • RNTI radio network temporary identifier
  • the user equipment determines, according to the RNTI, a response after detecting the authorization information, where the response includes the user.
  • Receiving device-to-device communication, the user equipment Send device-to-device communication.
  • the network side allocates two dedicated RNTIs, which are labeled as RNTI-1 and RNTI-2, to the user equipment; the dedicated RNTI is different from the RNTI for cell communication, such as C-RNTI (Cell-RNTI), allocated by the network side, Only for D2D communication. It is assumed that RNTI-1 and RNTI-2 are used to instruct the user equipment to perform D2D transmission and D2D reception, respectively.
  • RNTI-1 and RNTI-2 are used to instruct the user equipment to perform D2D transmission and D2D reception, respectively.
  • the user equipment detects the authorization information identified by the RNTI-1 in the subframe numbered n, and the user equipment transmits the D2D service data in the subframe numbered n+k.
  • k>0 indicating the timing relationship between the authorization information reception and the service data transmission during D2D communication.
  • the user equipment detects the authorization information identified by the RNTI-2 in the subframe numbered n, and the user equipment receives the D2D service data in the subframe numbered n+k. Where k > 0, indicating the timing relationship between the authorization information reception and the service data reception during D2D communication.
  • two dedicated RNTIs are also allocated, and the two dedicated RNTIs are used by the peer user equipment to determine that the authorization information is detected. The response is not repeated here.
  • the RNTI can also be used to identify D2D communications and cellular communications. For example, after the user equipment detects the authorization information of the dedicated RNTI identifier, the device-to-device communication is performed. After the user equipment detects the authorization information of the C-RNTI identifier, the cellular communication is performed, and details are not described herein.
  • the authorization information is identified by the subframe type, and after the user equipment detects the authorization information, the response after detecting the authorization information is determined according to the type of the subframe associated with the authorization information, where the response includes The user equipment performs device-to-device communication, and the user equipment performs device-to-device communication transmission.
  • the network side allocates a dedicated subframe for the user equipment to perform D2D communication, and the dedicated subframe includes a D2D reception dedicated subframe and a D2D transmission dedicated subframe.
  • the user equipment determines, according to the type of subframe associated with the detected authorization information, that the response to the authorization information is detected.
  • the user equipment detects the authorization information in the subframe numbered n, and the authorization information
  • the associated subframe number is n+k
  • the subframe n+k is a D2D dedicated subframe: if the subframe n+k is a D2D reception dedicated subframe of the user equipment, then the user equipment is in the subframe n+k Receiving D2D service data sent by the D2D peer user equipment; if the subframe n+k is a D2D transmission dedicated subframe of the user equipment, the user equipment sends the D2D service to the D2D peer user equipment in the subframe n+k data.
  • the above k > 0 indicates the transmission timing relationship between the reception of the authorization information and the reception or transmission of the service data during the D2D communication.
  • the D2D dedicated subframe is also allocated, including the D2D reception dedicated subframe and the D2D transmission dedicated subframe, and the D2D dedicated subframe and the foregoing
  • the D2D dedicated subframe positions may be the same, but the meanings are different, that is, the dedicated subframe of the D2D receiving subframe for the foregoing user equipment, and the D2D transmitting dedicated subframe for the opposite user equipment, and vice versa, no longer Narration.
  • D2D communication and cellular communication can be identified using RNTI.
  • the network side allocates a dedicated RNTI to the user equipment; the dedicated RNTI is different from the RNTI for cell communication allocated by the network side, such as C-RNTI (Cell RNTI), and is only used for D2D communication, so D2D communication and cellular communication are adopted.
  • RNTI can be distinguished.
  • D2D communication and cellular communication can be identified using only the RNTI. For example, after the user equipment detects the authorization information associated with the D2D-dedicated subframe, if the authorization information is identified by the RNTI of the cellular communication, such as the C-RNTI, the user equipment performs cellular communication in the associated subframe, for example, performs uplink service. The transmission of data.
  • D2D communication and cellular communication are identified using RNTI
  • the user equipment may be limited to not perform cellular communication in the D2D-dedicated subframe, that is, if the authorization information is associated with the D2D-dedicated subframe, the user equipment does not detect the authorization information of the RNTI, such as the C-RNTI identifier, that uses the cellular communication, and is no longer Narration.
  • the authorization information used to indicate the D2D communication may also be identified by the RNTI of the cellular communication, such as the C-RNTI, and the authorization information of the D2D communication and the cellular communication is identified using only the subframe type.
  • the user equipment detects the authorization information in the subframe numbered n, and the subframe number associated with the authorization information is n+k: if the subframe n+k is a D2D reception dedicated subframe, then the user equipment is The sub-frame n+k receives the D2D service data sent by the D2D peer user equipment; if the subframe n+k is a D2D transmission dedicated subframe, the user equipment sends the D2D peer user equipment in the subframe n+k Transmitting D2D service data; if the subframe n+k is a normal subframe (ie, not configured as a D2D dedicated subframe), the user equipment performs cellular communication in the subframe n+k, for example, performing uplink transmission or down
  • D2D communication and cellular communication can be identified using an authorization format.
  • the format of the authorization information set in the system for scheduling device-to-device communication is different from the authorization information format used by the cellular communication scheduling.
  • the user equipment detects the authorization information sent by the network side, it can determine whether the authorization information is used for scheduling device-to-device communication or scheduling cellular communication according to the format of the authorization information.
  • the authorization information format for device-to-device communication is detected, further determining whether to perform device-to-device communication transmission or reception according to the subframe type associated with the authorization information.
  • the search space can be used to distinguish between D2D communication and cellular communication, as described in Embodiment 1, and will not be described again.
  • the authorization information is identified by the identifier bit in the authorization information, and after detecting the authorization information, the user equipment determines, according to the identifier, a response after detecting the authorization information;
  • the method includes: the user equipment performs device-to-device communication, and the user equipment performs device-to-device communication transmission.
  • the identifier is added to the authorization information indicating the D2D communication, and the identifier includes at least two states, where the two states are respectively used to indicate that the user equipment performs device-to-device communication and the user equipment. Send device-to-device communication.
  • 1 bit in the authorization information is used to identify a bit, where 1 indicates transmission and 0 indicates reception.
  • the user equipment detects the authorization information, if the identifier bit in the authorization information is 1, the user equipment sends the service data to the D2D peer user equipment in the subframe associated with the authorization information; If the value is 0, the user equipment receives the service data sent by the D2D peer user equipment in the subframe associated with the authorization information.
  • the meaning of the identifier bit may be the same or different.
  • the identifier refers to the identifier of the user equipment for sending the meaning.
  • the identifier represents the meaning of the reception.
  • D2D communication and cellular communication can be identified using RNTI.
  • the network side allocates a dedicated RNTI to the user equipment; the dedicated RNTI is different from the RNTI for cell communication allocated by the network side, such as C-RNTI, and is only used for D2D communication, so D2D communication and cellular communication can be distinguished by using RNTI.
  • the D2D communication authorization information containing the identification bit is only identified using the dedicated RNTI.
  • D2D communication and cellular communication can be identified using the subframe type.
  • the network side allocates a dedicated subframe for the user equipment to perform D2D communication, and the user equipment determines, according to the type of the subframe associated with the detected authorization information, that the response of the authorization information is detected. For example, when the detected authorization information is associated with a D2D dedicated subframe, the user equipment parses the identification bit in the authorization information to determine whether to perform device-to-device communication transmission or reception.
  • D2D communication and cellular communication can be identified using an authorization format.
  • the format of the authorization information set in the system for scheduling device-to-device communication is different from the authorization information format used by the cellular communication scheduling.
  • the user equipment detects the authorization information sent by the network side, it can determine whether the authorization information is used for scheduling device-to-device communication or scheduling cellular communication according to the format of the authorization information.
  • the authorization information format for device-to-device communication is detected, the identification bit in the authorization information is further parsed to determine whether to perform device-to-device communication transmission or reception.
  • the search space can be used to distinguish between D2D communication and cellular communication, as described in Embodiment 1, and will not be described again.
  • the authorization information is identified by the authorization information format.
  • the response is determined according to the authorization information format, and the response includes: the user equipment performs the response.
  • the receipt of device-to-device communication which performs device-to-device communication.
  • At least two authorization information formats are set in the system for device-to-device communication, and the two authorization information formats are respectively used for the user equipment to perform device-to-device communication reception and device-to-device communication transmission scheduling.
  • the user equipment determines whether to perform D2D transmission or D2D reception according to the format of the authorization information.
  • D2D communication and cellular communication can be identified using RNTI.
  • the network side allocates a dedicated RNTI to the user equipment; the dedicated RNTI is different from the network side allocated for The RNTI of cellular communication, such as C-RNTI, is only used for D2D communication, so D2D communication and cellular communication can be distinguished by RNTI.
  • the device-to-device communication authorization information format described above is only identified using the dedicated RNTI.
  • D2D communication and cellular communication can be identified using the subframe type.
  • the network side allocates a dedicated subframe for the user equipment to perform D2D communication, and the user equipment determines, according to the type of the subframe associated with the detected authorization information, that the response of the authorization information is detected. For example, the user equipment detects the device-to-device communication authorization information only in the authorization information retrieval space associated with the dedicated subframe.
  • D2D communication and cellular communication can be identified using an authorization information format.
  • the foregoing authorization information format for device-to-device communication is different from the authorization information format of cellular communication in the system, and the user equipment can distinguish between D2D communication and cellular communication according to the detected authorization information format.
  • the search space can be used to distinguish between D2D communication and cellular communication.
  • the above-mentioned authorization information for device-to-device communication is transmitted only in the dedicated search space of the D2D authorization information, and will not be described again.
  • the authorization information is identified by the identifier bit in the authorization information, and after detecting the authorization information, the user equipment determines, according to the identifier, a response after detecting the authorization information; the response includes: the user equipment Receiving device-to-device communication, the user equipment performs device-to-device communication, and the user equipment performs uplink transmission of cellular communication.
  • the identifier is added to the authorization information, where the identifier includes at least three states, where the three states are used to indicate that the user equipment performs device-to-device communication, and the user equipment performs device-to-device The transmission of the communication, the uplink transmission of the cellular communication with the user equipment.
  • 2 bits of the authorization information are used to identify bits, where 00 represents uplink transmission of cellular communication, 01 represents transmission of D2D communication, and 10 represents reception of D2D communication.
  • the user equipment detects the authorization information, if the identifier bit in the authorization information is 00, the user The device sends the service data of the cellular communication uplink to the network side in the subframe associated with the authorization information; if the identifier bit is 01, the user equipment sends the peer to the D2D communication in the subframe associated with the authorization information. The user equipment sends the service data. If the identifier bit is 10, the user equipment receives the service data sent by the D2D communication peer user equipment in the subframe associated with the authorization information.
  • the foregoing identifier bit may be set to be optional.
  • whether the identifier bit appears in the authorization information may be configured by higher layer signaling, for example, RRC (Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the network side configures the identifier bit to appear in the authorization information through RRC signaling; otherwise, There is no such identifier bit field in the authorization information.
  • each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. This scenario is not limited to any specific combination of hardware and software.
  • the problem of control signaling transmission and scheduling when the cellular communication and the D2D communication coexist is solved, the interference of the cellular communication and the D2D communication is avoided, and the efficiency and reliability of the D2D communication are ensured.

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

Abstract

La présente invention se rapporte à un procédé de communication sans fil qui est utilisé pour identifier des informations d'autorisation au moyen d'au moins un paramètre parmi les paramètres suivants, à savoir un identifiant temporaire de réseau sans fil (RNTI), un type de sous-trame, une signalisation d'indication d'identifiant de liaison, un format d'informations d'autorisation, un espace de recherche et une position de ressources dans le domaine fréquentiel qui est indiquée par un paramètre d'allocation de ressources dans les informations d'autorisation. L'identifiant est utilisé pour détecter une réponse après qu'un équipement utilisateur qui détecte les informations d'autorisation, détermine que les informations d'autorisation sont détectées, la réponse comportant une partie des étapes suivantes ou toutes les étapes suivantes : l'équipement utilisateur réalisant une réception de communication de dispositif à dispositif ; l'équipement utilisateur réalisant une transmission de communication de dispositif à dispositif ; l'équipement utilisateur réalisant une réception de communication cellulaire ; et l'équipement utilisateur réalisant une transmission de communication cellulaire.
PCT/CN2013/071963 2012-03-01 2013-02-28 Procédé de communication sans fil et dispositif de communication sans fil WO2013127344A1 (fr)

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US10039110B2 (en) * 2013-10-31 2018-07-31 Telfonaktiebolaget Lm Ericsson (Publ) Methods and apparatuses for device-to-device communication
CN103596160B (zh) * 2013-11-25 2017-02-15 联想(北京)有限公司 一种数据传输方法和装置
CN105101041A (zh) * 2014-05-07 2015-11-25 夏普株式会社 基站、用户设备及相关方法
US11076417B2 (en) 2014-07-31 2021-07-27 Microsoft Technology Licensing, Llc Downlink transmission scheduling for user equipments enabling device-to-device communications
CN105517154B (zh) * 2014-09-22 2020-06-26 夏普株式会社 基站、用户设备及其方法

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WO2011109027A1 (fr) * 2010-03-05 2011-09-09 Nokia Corporation Transfert d'une communication directe poste à poste
WO2011135555A1 (fr) * 2010-04-30 2011-11-03 Nokia Corporation Fonctionnement en grappe dispositif à dispositif/machine à machine contrôlé par réseau
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