WO2016191965A1 - Terminal, station de base et procédé d'attribution de ressources - Google Patents

Terminal, station de base et procédé d'attribution de ressources Download PDF

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Publication number
WO2016191965A1
WO2016191965A1 PCT/CN2015/080372 CN2015080372W WO2016191965A1 WO 2016191965 A1 WO2016191965 A1 WO 2016191965A1 CN 2015080372 W CN2015080372 W CN 2015080372W WO 2016191965 A1 WO2016191965 A1 WO 2016191965A1
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WIPO (PCT)
Prior art keywords
terminal
cell
resource
neighboring cell
information
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PCT/CN2015/080372
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English (en)
Chinese (zh)
Inventor
赵振山
华尧
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/080372 priority Critical patent/WO2016191965A1/fr
Priority to CN201580061955.0A priority patent/CN107113293B/zh
Publication of WO2016191965A1 publication Critical patent/WO2016191965A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning

Definitions

  • the present invention relates to the field of wireless communications technologies, and in particular, to a terminal, a base station, and a resource allocation method.
  • D2D Device to Device
  • the terminal and the terminal The communication between the terminals can be directly performed without the need for the relay of the base station, and the base station can perform resource configuration, scheduling, coordination, and the like, and assist the communication between the terminals.
  • Vehicle networking communication can be implemented by D2D.
  • LTE Long Term Evolution
  • LTE-Vehicle Long-term evolution-vehicle
  • FIG. 2 in the LTE-V system, D2D communication is used between vehicles V1 and V2, and an evolved NodeB (eNB) allocates resources and performs interference coordination.
  • the resources for communication between the vehicles V1 and V2 are scheduled by the eNB.
  • the vehicle applies for resources to the eNB before the data transmission, and reports the status information of the vehicle to the eNB.
  • the eNB allocates resources according to the status information reported by the vehicle.
  • one mode of inter-cell interference coordination is: eNBs exchange information related to inter-cell interference through an X2 interface (an interface between eNBs), and when an eNB schedules a terminal of the cell, according to the received The interference related information of the neighboring cell performs resource scheduling to reduce the interference level between the cells.
  • One problem with this method is that the information related to inter-cell interference is exchanged through the X2 interface, which often has a large delay.
  • This method is more suitable for traditional voice and data services, because the data transmission of these services is relatively stable and the interference situation is relatively stable. It is also relatively stable.
  • each vehicle since the vehicle moves faster, each vehicle may send a data packet for several hundred milliseconds, and the number According to the data volume and transmission period of the packet, the information related to inter-cell interference can be exchanged through the X2 interface. Due to its short delay, it is not suitable for systems with high latency requirements such as the Internet of Vehicles. .
  • the embodiments of the present invention provide a terminal, a base station, and a resource allocation method, which are used to overcome the problem that the information related to inter-cell interference is exchanged through the X2 interface is large, and the delay requirement is applied to the Internet of Vehicles and the like.
  • a high system can allocate resources reasonably and effectively reduce interference between cells.
  • an embodiment of the present invention provides a terminal in a current cell in a terminal-to-terminal D2D system, including:
  • a processing module configured to determine resource occupancy information of the neighboring cell of the current cell
  • a transceiver module configured to report the resource occupation status information to a base station in the D2D system
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell.
  • the signal transmitted by the terminal in the neighboring cell includes at least one of the following signals:
  • the transmission resource usable by the terminal in the current cell includes at least one of the following resources:
  • the transmission resource of Discovery the transmission resource of the SA, and the transmission resource of the signal for carrying the data.
  • the processing module is specifically configured to:
  • the resource occupancy information is obtained by measuring the received Discovery.
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell is transmitting The occupancy of the transmission resources that can be used by the terminal in the current cell when Discovery.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • a cyclic offset CS used when generating a reference signal of the Discovery of the neighboring cell
  • An orthogonal cover code OCC used when generating a reference signal of the Discovery of the neighboring cell
  • the identification information included in the data of the neighboring cell for identifying the neighboring cell is included in the data of the neighboring cell.
  • the processing module when the signal transmitted by the terminal in the neighboring cell includes the SA, is specifically configured to:
  • the resource occupancy information is obtained by measuring the received SA
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the transmission resource that can be used by the terminal in the current cell when the SA is sent.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • Identification information for identifying the neighboring cell included in the data of the SA of the neighboring cell is included in the data of the SA of the neighboring cell.
  • the processing module is specifically used to :
  • the resource occupancy information is specifically used to indicate: the occupancy of the transmission resource that can be used by the terminal in the current cell when the terminal in the neighboring cell sends a signal for carrying data.
  • the processing module determines resource occupancy information of the neighboring cell of the current cell.
  • the transceiver module is further configured to: receive, by the base station, the sending resource information of the current cell, where the sending resource information of the current cell is used to indicate a sending resource that is available to the terminal in the current cell;
  • the processing module is further configured to: according to the sending resource information of the current cell received by the transceiver module, determine a sending resource that can be used when a terminal in the current cell transmits a signal in the current cell;
  • the processing module is specifically configured to:
  • the transceiver module is configured to receive a signal transmitted by a terminal in the neighboring cell on the determined available transmission resource, and obtain the resource occupancy information by measuring the received signal.
  • the transceiver module is further configured to: before the processing module determines resource occupancy information of the neighboring cell of the current cell,
  • the sending resource information of the current cell is used to notify a terminal that is available for use in the current cell a resource
  • the sending resource information of the neighboring cell is used to notify the neighboring small a transmission resource available to the terminal in the area
  • the processing module is further configured to: determine, according to the sending resource information of the current cell and the sending resource information of the neighboring cell, the sending resource that is available to the terminal in the current cell, and the The transmission resources available to the terminals in the neighboring cell overlap;
  • the processing module is specifically configured to: control the transceiver module to receive a signal transmitted by a terminal in the neighboring cell on the determined overlapping transmission resource, and obtain the resource occupation status by measuring the received signal. information.
  • the processing module determines resource occupancy information of the neighboring cell of the current cell.
  • the transceiver module is further configured to: receive a measurement control command sent by the base station, where the measurement control command is used to control the terminal in the current cell to perform measurement on a specified sending resource, where the specified sending resource is a resource in a transmission resource that overlaps between a transmission resource that can be used by a terminal in a current cell and a transmission resource that can be used by a terminal in the neighboring cell;
  • the processing module is specifically configured to:
  • the processing module determines resource occupancy information of the neighboring cell of the current cell.
  • the transceiver module is further configured to: receive, by the base station, the sending resource information of the current cell and the sending resource information of the neighboring cell, where the sending resource information of the current cell is used to indicate the current a transmission resource that can be used by the terminal in the cell, where the transmission resource information of the neighboring cell is used to indicate a transmission resource that is available to the terminal in the neighboring cell;
  • the terminal in the current cell When the terminal in the current cell is activated, if the transmission resource that can be used by the terminal in the current cell overlaps with the transmission resource that can be used by the terminal in the neighboring cell, there is overlap.
  • the signal transmitted by the terminal in the neighboring cell is received on the sending resource, and the resource occupancy information is obtained by measuring the received signal.
  • the resource occupancy information includes at least one of the following information:
  • the identification information of the K resources with the highest interference level, K is a positive integer
  • Identification information of resources that are not occupied by neighboring cells are not occupied by neighboring cells.
  • the transceiver module is specifically configured to:
  • the resource occupancy information is reported to the base station in a buffer status report BSR or a radio resource control RRC signaling.
  • an embodiment of the present invention provides a base station in a terminal-to-terminal D2D system, including:
  • a transceiver module configured to receive resource occupancy information of a neighboring cell of the current cell reported by a terminal in a current cell in the D2D system
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell;
  • a processing module configured to allocate, according to the resource occupancy information received by the transceiver module, a transmission resource for the terminal in the current cell.
  • the signal transmitted by the terminal in the neighboring cell includes at least one of the following signals:
  • the transmission resource usable by the terminal in the current cell includes at least one of the following resources:
  • the transmission resource of Discovery the transmission resource of the SA, and the transmission resource of the signal for carrying the data.
  • the resource occupancy information is specifically used to indicate: a sending resource that is available to the terminal in the current cell when the terminal in the neighboring cell sends the Discovery.
  • the terminal in the neighboring cell carries the identification information used to identify the neighboring cell when transmitting the Discovery.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • a cyclic offset CS used when generating a reference signal of the Discovery of the neighboring cell
  • An orthogonal cover code OCC used when generating a reference signal of the Discovery of the neighboring cell
  • the identification information included in the data of the neighboring cell for identifying the neighboring cell is included in the data of the neighboring cell.
  • the resource occupancy information is specifically used to indicate: a sending resource that is available to the terminal in the current cell when the terminal in the neighboring cell sends the SA Occupation
  • the terminal in the neighboring cell carries the identifier information for identifying the neighboring cell when the SA is sent.
  • the cell identifier information includes at least one of the following information:
  • Identification information for identifying the neighboring cell included in the data of the SA of the neighboring cell is included in the data of the SA of the neighboring cell.
  • the resource occupancy information is specifically used to indicate that when the terminal in the neighboring cell sends a signal for carrying data, The occupancy of the transmission resources that can be used by the terminal in the current cell;
  • the resource occupancy information is obtained by the terminal from the SA sent by the terminal in the neighboring cell that is received.
  • the transceiver module is further configured to: Before the resource occupancy information of the neighboring cell of the current cell reported by the terminal,
  • the resource occupancy information received by the transceiver module is that the terminal in the current cell determines, according to the received resource information of the current cell, a transmission resource that can be used when being sent in the current cell, where The determined transmit resource is used to receive a signal transmitted by a terminal in the neighboring cell, and the received signal is measured.
  • the transceiver module is further configured to: Before the resource occupancy information of the neighboring cell of the current cell reported by the terminal,
  • the sending resource information of the current cell and the sending resource information of the neighboring cell sent by the terminal in the current cell where the sending resource information of the current cell is used to indicate the current cell a transmission resource that can be used by the terminal, and the transmission resource information of the neighboring cell is used to indicate a transmission resource that is available to the terminal in the neighboring cell;
  • the resource occupancy information received by the transceiver module is the same in the current cell
  • the terminal determines, according to the received transmission resource information of the current cell and the transmission resource information of the neighboring cell, a transmission resource that can be used by the terminal in the current cell and a transmission resource that can be used by the terminal in the neighboring cell. Overlapping; receiving a signal transmitted by a terminal in the neighboring cell on the determined overlapping transmission resource, and measuring the received signal.
  • the transceiver module is further configured to: Before the resource occupancy information of the neighboring cell of the current cell reported by the terminal,
  • the resource occupancy information received by the transceiver module is that the terminal in the current cell receives a signal transmitted by a terminal in the neighboring cell on the designated transmission resource, and receives the signal received by the terminal. Take measurements.
  • the transceiver module is further configured to: Before the resource occupancy information of the neighboring cell of the current cell reported by the terminal,
  • the measurement control instruction is used to:
  • the transmit resource that can be used by the terminal in the current cell overlaps with the transmit resource that can be used by the terminal in the neighboring cell, and receives on the overlapping transmit resource.
  • the resource occupation information includes at least one of the following information One:
  • the identification information of the K resources with the highest interference level, K is a positive integer
  • Identification information of resources that are not occupied by neighboring cells are not occupied by neighboring cells.
  • the transceiver module is specifically configured to:
  • the processing module is specifically configured to:
  • the transmission resource in the current cell that is less interfered by the neighboring cell is preferentially allocated to the terminal located in the cell edge of the current cell.
  • an embodiment of the present invention provides a resource allocation method in a terminal-to-terminal D2D system, including:
  • the terminal in the current cell in the D2D system determines resource occupancy information of the neighboring cell of the current cell
  • the terminal in the current cell reports the resource occupation status information to the base station in the D2D system
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell.
  • the signal transmitted by the terminal in the neighboring cell includes at least one of the following signals:
  • the transmission resource usable by the terminal in the current cell includes at least one of the following resources:
  • the transmission resource of Discovery the transmission resource of the SA, and the transmission resource of the signal for carrying the data.
  • the terminal in the current cell in the D2D system Determining resource occupancy information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system determines that the received Discovery carries the identifier information for identifying the neighboring cell, the terminal obtains the resource occupancy information by measuring the received Discovery. ;
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the transmission resource that is available to the terminal in the current cell when the Discovery is sent.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • a cyclic offset CS used when generating a reference signal of the Discovery of the neighboring cell
  • An orthogonal cover code OCC used when generating a reference signal of the Discovery of the neighboring cell
  • the identification information included in the data of the neighboring cell for identifying the neighboring cell is included in the data of the neighboring cell.
  • a terminal in a current cell in the D2D system Determining resource occupancy information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system determines that the received SA carries the identifier information for identifying the neighboring cell, the terminal obtains the resource by measuring the received SA. Usage information;
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the transmission resource that can be used by the terminal in the current cell when the SA is sent.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • Identification information for identifying the neighboring cell included in the data of the SA of the neighboring cell is included in the data of the SA of the neighboring cell.
  • the terminal in the cell determines the resource occupation information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system acquires the resource occupation information from the SA sent by the terminal in the neighboring cell;
  • the resource occupancy information is specifically used to indicate: the occupancy of the transmission resource that can be used by the terminal in the current cell when the terminal in the neighboring cell sends a signal for carrying data.
  • the method further includes:
  • the terminal in the current cell in the D2D system receives the sending resource information of the current cell sent by the base station, where the sending resource information of the current cell is used to indicate that the terminal in the current cell is usable. Send resources;
  • the terminal in the current cell determines, according to the received transmission resource information of the current cell, a transmission resource that can be used when transmitting a signal in the current cell;
  • the terminal in the current cell in the D2D system determines the resource occupation information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system receives a signal transmitted by a terminal in the neighboring cell on the determined available transmission resource, and obtains the resource occupation by measuring the received signal. Situation information.
  • the method further includes:
  • the terminal in the current cell in the D2D system receives the sending resource information of the current cell and the sending resource information of the neighboring cell sent by the base station; where the sending resource information of the current cell is And a sending resource that is used by the terminal in the current cell, where the sending resource information of the neighboring cell is used to notify a sending resource that is available to the terminal in the neighboring cell;
  • the terminal in the current cell in the D2D system determines, according to the received transmission resource information of the current cell and the transmission resource information of the neighboring cell, a transmission resource and a location that can be used by the terminal in the current cell.
  • the transmission resources that can be used by the terminals in the neighboring cell overlap;
  • the terminal in the current cell in the D2D system determines the resource occupation information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system receives a signal transmitted by a terminal in the neighboring cell on the determined overlapping transmission resource, and obtains the resource occupancy condition by measuring the received signal. information.
  • the method further includes:
  • the terminal in the current cell in the D2D system receives a measurement control command sent by the base station, where the measurement control command is used to control the terminal in the current cell to perform measurement on a specified transmission resource, Specifying that the transmission resource is a resource in a transmission resource that is overlapped between a transmission resource that can be used by the terminal in the current cell and a transmission resource that can be used by the terminal in the neighboring cell;
  • the terminal in the current cell in the D2D system determines the resource occupation information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system receives the information sent by the terminal in the neighboring cell on the designated sending resource, and obtains the resource occupancy information by measuring the received signal.
  • the method further includes:
  • the terminal in the current cell in the D2D system receives the sending resource information of the current cell and the sending resource information of the neighboring cell sent by the base station; where the sending resource information of the current cell is And a sending resource that is used by the terminal in the current cell, where the sending resource information of the neighboring cell is used to indicate a sending resource that is available to the terminal in the neighboring cell;
  • the terminal in the current cell in the D2D system receives a measurement control command sent by the base station, where the measurement control instruction is used to:
  • the transmit resource that can be used by the terminal in the current cell overlaps with the transmit resource that can be used by the terminal in the neighboring cell, and receives on the overlapping transmit resource.
  • the resource occupancy information includes at least one of the following information:
  • the identification information of the K resources with the highest interference level, K is a positive integer
  • Identification information of resources that are not occupied by neighboring cells are not occupied by neighboring cells.
  • the terminal in the current cell reports the determined resource occupation information to the base station in the D2D system, including:
  • the terminal in the current cell reports the resource occupancy information to the base station in the buffer status report BSR or the radio resource control RRC signaling.
  • an embodiment of the present invention provides a resource allocation method in a terminal-to-terminal D2D system, including:
  • the base station in the D2D system receives resource occupancy information of the neighboring cell of the current cell reported by the terminal in the current cell;
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell;
  • the base station allocates a transmission resource to the terminal in the current cell according to the received resource occupancy information.
  • the signal transmitted by the terminal in the neighboring cell includes at least one of the following signals:
  • the transmission resource usable by the terminal in the current cell includes at least one of the following resources:
  • the transmission resource of Discovery the transmission resource of the SA, and the transmission resource of the signal for carrying the data.
  • the resource occupancy information is specifically used to indicate: a sending resource that is available to the terminal in the current cell when the terminal in the neighboring cell sends the Discovery.
  • the terminal in the neighboring cell carries a label for identifying the neighboring cell when transmitting the Discovery Know the information.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • a cyclic offset CS used when generating a reference signal of the Discovery of the neighboring cell
  • An orthogonal cover code OCC used when generating a reference signal of the Discovery of the neighboring cell
  • the identification information included in the data of the neighboring cell for identifying the neighboring cell is included in the data of the neighboring cell.
  • the resource occupancy information is specifically used to indicate: a sending resource that is available to the terminal in the current cell when the terminal in the neighboring cell sends the SA Occupation
  • the terminal in the neighboring cell carries the identifier information for identifying the neighboring cell when the SA is sent.
  • the cell identifier information includes at least one of the following information:
  • Identification information for identifying the neighboring cell included in the data of the SA of the neighboring cell is included in the data of the SA of the neighboring cell.
  • the resource occupancy information is specifically used to indicate that when the terminal in the neighboring cell sends a signal for carrying data, The occupancy of the transmission resources that can be used by the terminal in the current cell;
  • the resource occupancy information is obtained by the terminal from the SA sent by the terminal in the neighboring cell that is received.
  • the base station in the D2D system receives the current cell Before the resource occupancy information of the neighboring cell of the current cell reported by the terminal, the method further includes:
  • the resource occupancy information received by the base station is determined by the terminal in the current cell according to the received resource information of the current cell, and the transmission resource that can be used when being sent in the current cell is determined.
  • the available transmission resource receives the signal transmitted by the terminal in the neighboring cell, and measures the received signal.
  • the base station in the D2D system receives the current cell Before the resource occupancy information of the neighboring cell of the current cell reported by the terminal, the method further includes:
  • the resource occupancy information received by the base station is information about the received resource information of the current cell and the sending resource information of the neighboring cell according to the received terminal in the current cell. Determining that the transmission resource that can be used by the terminal in the current cell overlaps with the transmission resource that can be used by the terminal in the neighboring cell; and receiving the signal transmitted by the terminal in the neighboring cell on the determined overlapping transmission resource, And the received signal is measured.
  • the base station in the D2D system receives the current cell Before the resource occupancy information of the neighboring cell of the current cell reported by the terminal, the method further includes:
  • the base station sends a measurement control command to the terminal in the current cell, where the measurement control command is used to control the terminal in the current cell to perform measurement on a designated sending resource, where the designated sending resource is a resource in a transmission resource that overlaps between a transmission resource that can be used by a terminal in a current cell and a transmission resource that can be used by a terminal in the neighboring cell;
  • the resource occupancy information received by the base station is that the terminal in the current cell receives a signal transmitted by a terminal in the neighboring cell on the designated transmission resource, and performs the received signal on the received signal. Measured.
  • the base station in the D2D system receives the current cell Before the resource occupancy information of the neighboring cell of the current cell reported by the terminal, the method further includes:
  • a measurement control instruction sent by the base station to the terminal in the current cell where the measurement control instruction is used to:
  • the transmit resource that can be used by the terminal in the current cell overlaps with the transmit resource that can be used by the terminal in the neighboring cell, and receives on the overlapping transmit resource.
  • a signal transmitted by a terminal in the neighboring cell, and measuring the received signal A quantity to obtain the resource occupancy information.
  • the resource occupancy information includes at least one of the following information One:
  • the identification information of the K resources with the highest interference level, K is a positive integer
  • Identification information of resources that are not occupied by neighboring cells are not occupied by neighboring cells.
  • the base station in the D2D system receives the current cell
  • the resource occupancy information of the neighboring cell of the current cell reported by the terminal including:
  • the base station receives, by the terminal in the current cell, the resource occupation information reported by the terminal in a buffer status report BSR or a radio resource control RRC signaling.
  • the base station is configured according to the received resource
  • the situation information is used to allocate a sending resource to the terminal in the current cell, including:
  • the base station preferentially allocates the transmission resource in the current cell that is less interfered by the neighboring cell to the terminal located in the cell edge of the current cell.
  • the terminal in the current cell reports the resource reporting of the neighboring cell of the current cell to the base station, and the delay reported by the terminal to the base station is usually much smaller than the transmission delay of the X2 interface. Therefore, it is possible to overcome the problem that the existing information related to the exchange of inter-cell interference based on the X2 interface is large.
  • the terminal since the terminal directly communicates with the terminal in the D2D system, the resource occupancy information of the neighboring cell of the current cell reported by the terminal to the base station is compared with the existing cell exchanged between the base stations through the X2 interface. Compared with the method of interfering with related information, the terminal can more accurately reflect the interference of the terminal. Therefore, the base station performs resource allocation based on the resource occupancy information reported by the terminal, and can effectively avoid interference of the terminal in the D2D system. The terminal can report the measured interference information to the base station in real time, and the delay is usually much smaller than the transmission delay through the X2 interface. Therefore, the technical solution provided by the embodiment of the present invention is more suitable for interference coordination between cells in a D2D system.
  • the base station may send, in advance, the sending resource information used to indicate the available transmission resources of the terminal in the current cell to the terminal in the current cell, and indicate that the terminal in the current cell is in the available sending resource.
  • the signal received by the terminal in the neighboring cell is received, and the received signal is measured to obtain the resource occupancy information.
  • the terminal in the neighboring cell may carry the identifier information, such as the discovery, the scheduling, and the data, and the identifier information of the neighboring cell.
  • the terminal in the current cell can learn that the received signal is from the neighboring cell, and in the existing D2D system, the terminal in the current cell and the neighboring cell does not carry the cell identification information when transmitting the signal, so that In the D2D system, the terminal cannot distinguish whether the received signal is transmitted by the terminal in the current cell or the neighboring cell.
  • 1 is a schematic diagram of a D2D communication method
  • FIG. 2 is a schematic diagram of D2D communication between vehicles in an LTE-V system
  • FIG. 3 is a schematic diagram of a transmission mode in a D2D system
  • FIG. 4 is a schematic diagram of a D2D system in which a terminal uses a transmission resource in an SA resource pool to perform scheduling, and a terminal transmits data in a transmission resource in a data resource pool;
  • FIG. 5 is a schematic structural diagram of a D2D system according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of information reported by a terminal using a short buffer status report (BSR) to report resource occupancy status according to the first embodiment of the present invention
  • FIG. 7 is a schematic diagram of information used by a terminal to report resource occupation status by using a long BSR according to the first embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a neighboring cell in a cellular network divided into three groups according to Embodiment 2, Embodiment 3, and Embodiment 4 of the present invention.
  • FIG. 9 is a schematic diagram of a neighboring cell in a cellular network divided into seven groups according to Embodiment 2, Embodiment 3, and Embodiment 4 of the present invention.
  • Embodiment 10 is a message flow chart of Embodiment 5 of the present invention.
  • FIG. 12 is a schematic structural diagram of a terminal according to Embodiment 7 of the present invention.
  • FIG. 13 is a schematic structural diagram of a terminal according to Embodiment 8 of the present invention.
  • FIG. 14 is a schematic structural diagram of a base station according to Embodiment 9 of the present invention.
  • FIG. 15 is a schematic structural diagram of a base station according to Embodiment 10 of the present invention.
  • FIG. 16 is a flowchart of a resource allocation method in a D2D system according to Embodiment 11 of the present invention.
  • FIG. 17 is a flowchart of a resource allocation method in a D2D system according to Embodiment 12 of the present invention.
  • the embodiments of the present invention can be applied to a D2D system to overcome the problem of large information delay associated with exchanging inter-cell interference through the X2 interface.
  • the terminal in the current cell reports the resource occupancy information of the neighboring cell of the current cell to the base station in the D2D system, and the base station allocates resources to the terminal in the current cell according to the received resource occupancy information. Reduce the interference of the neighboring cell to the current cell.
  • the delay reported by the terminal to the base station is usually much smaller than the transmission delay of the X2 interface, the problem that the information related to the inter-cell interference based on the X2 interface is large can be overcome.
  • the terminal since the terminal directly communicates with the terminal in the D2D system, the resource occupancy information of the neighboring cell of the current cell reported by the terminal to the base station is compared with the existing cell exchanged between the base stations through the X2 interface. Compared with the method of interfering with related information, the terminal can more accurately reflect the interference of the terminal. Therefore, the base station performs resource allocation based on the resource occupancy information reported by the terminal, and can effectively avoid interference of the terminal in the D2D system. The terminal can report the measured interference information to the base station in real time, and the delay is usually much smaller than the transmission delay through the X2 interface. Therefore, the technical solution provided by the embodiment of the present invention is more suitable for interference coordination between cells in the D2D system.
  • the base station may send, to the terminal in the current cell, the transmission resource information used to indicate the available transmission resources of the terminal in the current cell, and indicate that the terminal in the current cell receives the neighboring cell on the available transmission resource.
  • the signal transmitted by the terminal inside, and the measured signal is measured. To the above resource occupancy information.
  • the terminal in the neighboring cell may carry the identifier information, such as the discovery, the scheduling, and the data, and the identifier information of the neighboring cell.
  • the terminal in the current cell can learn that the received signal is from the neighboring cell, and in the existing D2D system, the terminal in the current cell and the neighboring cell does not carry the cell identification information when transmitting the signal, so that In the D2D system, the terminal cannot distinguish whether the received signal is transmitted by the terminal in the current cell or the neighboring cell.
  • the Discovery refers to the periodic broadcast information of the terminal, so that other terminals around the terminal can detect the information and discover the terminal;
  • the communication refers to the direct transmission of data between the two terminals, and uses Scheduling Assignment.
  • SA combines the data (Data) transmission mechanism to achieve end-to-end data transmission, as shown in Figure 3, where:
  • SA used to indicate the status of data sent from the terminal.
  • the information carried includes time-frequency resource information of the data, Modulation and Coding Scheme (MCS) information, frequency hopping indication, timing advance information, and receiving group identification. , ID) information, etc., the receiving end can receive data according to the indication of the SA;
  • MCS Modulation and Coding Scheme
  • the Discovery, SA, and data in the D2D system are in the same format as the Physical Uplink Shared CHannel (PUSCH) in the existing LTE system, and are implemented by using a DeModulation Reference Signal (DMRS). demodulation.
  • PUSCH Physical Uplink Shared CHannel
  • DMRS DeModulation Reference Signal
  • the signal scrambling and the generation of the reference signal As shown in Table 1 below, it is different from the existing cellular network system based on LTE implementation.
  • the cell identifier and RNTI used for signal scrambling are fixedly set for different cells, and the cell is not distinguished; and the reference signal DMRS is used to generate when generated.
  • the cell identifier of the base sequence is fixedly configured to be the same 510 for different cells, and the CS and OCC for generating the DMRS are also fixedly configured the same for different cells. Therefore, the terminal can detect the Discovery and SA of all surrounding cells without knowing the information of the sender of the signal.
  • the terminal when the terminal transmits any one or more signals of the Discovery, the SA, and the signal for carrying the data, the terminal carries the identifier information for identifying the cell where the terminal is located, so that a cell
  • the terminal can distinguish whether it is from the neighboring cell or from the local cell, and further distinguish which neighboring cell is from.
  • the base station allocates a transmission resource pool for the terminal for transmission by the terminal.
  • the resource pool is configured by a base station and is a collection of transmission resources such as time-frequency resources.
  • the base station can be configured with resource pools, such as: Discovery resource pool, SA resource pool, and data resource pool.
  • resource pools such as: Discovery resource pool, SA resource pool, and data resource pool.
  • the base station can exchange resource pool information, and the base station can broadcast the information of the resource pool of the current cell and the resource pool of the neighboring cell.
  • the information of the resource pool of the different signals and the information of the receiving resource pool are respectively broadcasted in the information of the resource pool broadcasted by the base station.
  • the terminal transmits or listens to the signal in the resource pool indicated by the information of the resource pool according to the information of the resource pool broadcasted by the base station, so that the terminal has the opportunity to listen to the resource pool of the neighboring cell and implement D2D transmission between the cells.
  • the terminal uses the transmission resource in the SA resource pool to perform scheduling, and the terminal is configured to send data on the transmission resource in the data resource pool, and the other terminal obtains the data resource scheduled by the SA by detecting the SA.
  • the information of the resource pool may include, but is not limited to, a starting position, a size, a period, and the like of the resource pool.
  • the LTE-based D2D system is taken as an example, but the D2D system provided by the embodiment of the present invention is not only implemented based on the LTE.
  • the communication system on which the D2D system provided by the embodiment of the present invention is based includes, but is not limited to, :
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • TD-SCDMA Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • FDD LTE Frequency Division Duplexing-Long Term Evolution
  • LTE-advanced Long Term Evolution-Advanced
  • PHS Personal Handy-phone System
  • WiFi Wireless Fidelity
  • WiMAX Worldwide Interoperability for Microwave Access
  • the base station is a network device having a radio resource management function
  • the terminal is a terminal device that performs D2D communication with other terminals under the control of the base station, including a user equipment, a relay node, and the like.
  • the base station in the D2D system provided by the embodiment of the present invention may be an evolved Node B (eNodeB), and the terminal is a User Equipment (UE);
  • eNodeB evolved Node B
  • UE User Equipment
  • the base station in the D2D system may include: a Node B (NodeB), or a NodeB and a Radio Network Controller (RNC), and the terminal is a UE;
  • NodeB Node B
  • RNC Radio Network Controller
  • the base station in the D2D system may include a Base Transceiver Station (BTS), or a BTS and a Base Station Controller (BSC), and the terminal is a mobile station ( Mobile Station, MS);
  • BTS Base Transceiver Station
  • BSC Base Station Controller
  • MS Mobile Station
  • the base station in the D2D system provided by the embodiment of the present invention may include: an access point (AP), and the terminal may be a station (STAtion, STA).
  • AP access point
  • STAtion station
  • the D2D system provided in Embodiment 1 includes: a base station 501 and a terminal 502, where:
  • the terminal 502 is configured to report, to the base station in the D2D system, resource occupancy information of a neighboring cell of the current cell where the user is located;
  • the base station 501 is configured to allocate a transmission resource to the terminal in the current cell according to the received resource occupancy information, so as to reduce interference generated by the neighboring cell to the current cell.
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell.
  • All the terminals or some terminals in the current cell may report the resource occupation information of the neighboring cell.
  • the base station 501 can configure all the terminals in the current cell by using signaling, or configure the specified terminal to report resource occupancy information.
  • the base station 501 can notify the terminal through a system message, or pass A dedicated signaling terminal that interacts with the designated terminal, for example, a Radio Resource Control (RRC) signaling terminal.
  • RRC Radio Resource Control
  • the terminal can report the resource occupancy information to all the terminals in the D2D system; or the terminal that has the resource occupancy information reporting capability in the D2D system reports the resource occupation information.
  • the base station 501 can collect the resource occupation information reported by the terminal in the current cell, and then collect and send the resource for the terminal in the current cell to reduce the pair.
  • the interference generated by the current cell; or the base station 501 allocates a transmission resource to the terminal according to the resource occupancy information reported by the terminal.
  • the base station 501 allocates a transmission resource to the terminal D according to the resource occupancy information reported by the terminal A, the terminal B, and the terminal C.
  • the base station 501 allocates the transmission resource to the terminal A according to the resource occupancy information reported by the terminal A, or
  • the base station 501 allocates a transmission resource or the like to the terminal A according to the resource occupancy information reported by the terminal A and the terminal B.
  • the base station 501 may send the sending resource information of the current cell to the terminal in the current cell, where the sending resource information is used to indicate the sending resource that is available to the terminal in the current cell.
  • the terminal 502 determines, according to the received transmission resource information of the current cell, a transmission resource that can be used when transmitting in the current cell;
  • the terminal 502 in determining the resource occupancy information of the neighboring cell of the current cell, specifically, may receive a signal transmitted by the terminal in the neighboring cell on the determined available transmission resource, and measure the received signal. In order to obtain the above information on resource occupancy.
  • the resource occupancy information may include at least one of the following information:
  • the identification information of the K resources with the highest level of interference for example, the order of the interference levels according to the interference generated from high to low, and the identification information of the K resources in the first K bits, K is a positive integer;
  • Identification information of resources that are not occupied by neighboring cells are not occupied by neighboring cells.
  • the identifier information of the occupied resource may include a resource index of the occupied resource, optionally,
  • the resource index of the resource may be stipulated by the protocol, or the base station 501, when transmitting the transmission resource information of the current cell to the terminal in the current cell, indicates the transmission resource and the corresponding resource index, so that the terminal 502 uses the resource index to report the resource occupation information.
  • the index of the occupied resource is represented by 4 bits of information, the resource whose index number is 0 is occupied by 0000, and the resource whose index number is 5 is occupied by 0101; if the occupied resource includes the index number of 0, 1, 5, 10
  • the resources are identified by the bit information list: 0000, 0001, 0101, 1010;
  • the occupied resource is represented by a bitmap
  • the bitmap 1010110000000001, indicating that the resources of the current cell whose index numbers are 0, 2, 4, 5, and 15 are Occupied, where "0" means unoccupied and "1" means occupied.
  • bitmap when there are many resources occupied, the use of bitmap can save overhead.
  • the terminal 502 can report the resource index of the resource occupied by the neighboring cell to the base station 501. Specifically, the terminal 502 can report the resource index of all the occupied resources to the base station, or only the reported part is The resource index of the occupied resource.
  • the terminal 502 measures the signal transmitted by the terminal in the received neighboring cell, and the stronger the strength of the received signal, the greater the interference generated by the neighboring cell that is detected, so the terminal 502 can detect
  • the audible interference levels are sorted in descending order, and the resource index of the K resources of the top K bits of the interference level is reported to the base station 501, which may be pre-configured, or broadcast by the base station 501 through a system message, or by The base station 501 sends the value of the K to the terminal 502 through the dedicated RRC signaling. For example, when the base station 501 transmits the transmission resource information of the current cell to the terminal in the current cell, the base station 501 transmits the value of the K or sends it through other RRC signaling.
  • the terminal 502 reports the resource index of the resource that is not occupied by the neighboring cell to the base station 501; the terminal may report the resource index of all the unoccupied resources to the base station 501, or only report the resource index of the partially unoccupied resource.
  • the number of the reported indexes may be pre-configured, or broadcast by the base station 501 through the system message, or sent by the base station 501 to the terminal 502 through dedicated RRC signaling, for example:
  • the base station 501 transmits the value of the K or transmits it through other RRC signaling.
  • the terminal 502 can report the resource occupation status information to the base station 501 by using a buffer status report BSR or RRC signaling.
  • the terminal 502 can report resource occupancy information by using an octet (Oct) 2 to N+1 in a short BSR (short BSR).
  • OFct octet
  • the terminal 502 can report resource occupancy information by using Oct4 to N+3 in the long BSR.
  • the base station 501 can preferentially allocate the transmission resource in the current cell that is less interfered by the neighboring cell to the terminal located in the cell edge of the current cell, so as to reduce interference generated by the neighboring cell to the current cell, so that the neighboring cells are implemented. Interference coordination.
  • the signal transmitted by the terminal in the neighboring cell includes at least one of the following signals:
  • the transmission resources usable by the terminal in the current cell include at least one of the following resources:
  • the transmission resource of Discovery the transmission resource of the SA, and the transmission resource of the signal for carrying the data.
  • the Discovery transmitted by the terminal of the neighboring cell may occupy the transmission resource of the Discovery that can be used by the terminal in the current cell, the transmission resource of the SA that can be used by the terminal in the current cell, or the terminal that can be used by the terminal in the current cell.
  • the SA transmitted by the terminal of the neighboring cell may occupy the transmission resource of the Discovery that the terminal in the current cell can use, the transmission resource of the SA that can be used by the terminal in the current cell, or the terminal that can be used by the terminal in the current cell.
  • the signal for carrying data transmitted by the terminal of the neighboring cell may occupy the transmission resource of the Discovery that can be used by the terminal in the current cell, the transmission resource of the SA that can be used by the terminal in the current cell, or the terminal that can be used by the terminal in the current cell.
  • a transmission resource for a signal carrying data may be occupy the transmission resource of the Discovery that can be used by the terminal in the current cell, the transmission resource of the SA that can be used by the terminal in the current cell, or the terminal that can be used by the terminal in the current cell.
  • the terminal in the neighboring cell may carry the identifier information for identifying the neighboring cell, so that the terminal in the current cell can identify and receive the packet.
  • the incoming signal comes from the neighboring cell.
  • the cell identifier and RNTI used for the data scrambling of Discovery are fixedly set for different cells, and the cell is not distinguished; and the reference signal of Discovery
  • the cell identifier used to generate the base sequence is fixedly configured to be the same 510 for different cells, and the CS and OCC for generating the DMRS are also fixedly configured the same for different cells. Therefore, in the current D2D system, the terminal cannot recognize that Discovery is sent by the terminal in the neighboring cell.
  • the terminal in the neighboring cell carries the identifier information for identifying the neighboring cell when the Discovery is transmitted, so that the terminal in the current cell can recognize that the received Discovery is transmitted by the terminal in the neighboring cell.
  • the identification information used to identify the neighboring cell includes but is not limited to:
  • the base sequence used to generate the reference signal of the Discovery of the neighboring cell is the base sequence used to generate the reference signal of the Discovery of the neighboring cell
  • Cyclic Shift used to generate the reference signal of the Discovery of the neighboring cell
  • Orthogonal Cover Code used when generating the reference signal of the Discovery of the neighboring cell
  • the identification information included in the data of the neighboring cell for identifying the neighboring cell is included in the data of the neighboring cell.
  • information for distinguishing the local cell and the neighboring cell may be added to the data of the Discovery, that is, the Discovery indication, for example, a 2-bit sector ID or a 9-bit Cell ID (as shown in Table 3 below).
  • the terminal can detect whether the Discovery is from the current cell or the neighboring cell by detecting the Discovery information according to the sector ID carried in the Discovery or the Cell ID.
  • the identification information for identifying the cell is not included in the Discovery indication. Therefore, the terminal cannot identify whether the Discovery is a terminal in the current cell or a terminal in the neighboring cell.
  • the indication is in Discovery.
  • the identification information used to identify the neighboring cell is added, and after receiving the Discovery, the terminal may use the identifier in the Discovery indication.
  • the identification information of the neighboring cell identifies that the Discovery is transmitted by the terminal in the neighboring cell.
  • the DMRS of the Discovery between the neighboring cells may use different CSs, and the scheme for detecting the Discovery by using the different CSs may refer to the following Embodiment 2.
  • the DMRS of the Discovery between the neighboring cells may also adopt a different OCC, which is similar to the CS used in the second embodiment. For the specific implementation, refer to the second embodiment. No longer.
  • the DMRS of the Discovery between the neighboring cells may also adopt different base sequences.
  • the base sequence may also be generated according to the Cell ID in Table 1.
  • the Cell ID may be
  • the cell identifier of the neighboring cell may also be other information that can distinguish the current cell from the neighboring cell, as long as the neighboring cell can be distinguished, for example, seven adjacent cells, and the Cell ID is set to 1 to 7, respectively.
  • the base sequence of the neighboring cells generated by the Cell ID will also be different.
  • the DMRS of the Discovery between the neighboring cells is implemented in a different base sequence, and is similar to the CS in the second embodiment. For the specific implementation, reference may be made to the second embodiment.
  • the DMRS of the Discovery between adjacent cells may also adopt a combination of any two or three of different OCC, CS, and base sequences, as long as the combination of the neighboring cells is different, the terminal attempts according to different combinations. Receiving Discovery, the recognition of the neighboring cell Discovery can be realized.
  • the identifier information used to identify the cell is information four or information five, or a combination of information four and information five.
  • the identifier information used to identify the cell is information four or information five, or a combination of information four and information five.
  • the implementation manner refer to the following third embodiment.
  • the foregoing scrambling sequence may also be generated by using a combination of a cell identifier and a user equipment identifier.
  • the terminal may descramble the data of the Discovery according to different combinations. Realize the identification of the neighboring cell Discovery.
  • the cell identification information is information six
  • different CRC masks may be used for the Discovery between neighboring cells, and the terminal tries different masks when performing CRC check on the received Discovery.
  • the identification of the neighboring cell Discovery can be realized.
  • the cell identification information is information VII
  • the data of the Discovery of the neighboring cell is included in the standard Identify the identification information of the neighboring cell.
  • the terminal realizes the identification of the neighboring cell Discovery according to the identifier information used to identify the neighboring cell included in the received data of the Discovery.
  • any one of the above seven kinds of information may be combined. As long as the combination is different, the terminal may try to receive the Discovery according to different combinations, and the identification of the neighboring cell Discovery may be implemented.
  • the cell identifier and RNTI used for data scrambling of the SA are fixedly set for different cells in the D2D system, and the cell is not distinguished; and the reference signal of the SA is DMRS.
  • the cell identifiers used to generate the base sequence are fixedly configured to be the same 510 for different cells, and the CS and OCC for generating the DMRS are also fixedly configured the same for different cells. Therefore, in the current D2D system, the terminal cannot recognize that the SA is transmitted by the terminal in the neighboring cell.
  • the terminal in the neighboring cell carries the identifier information for identifying the neighboring cell when the SA is sent, so that the terminal in the current cell can identify that the received SA is transmitted by the terminal in the neighboring cell.
  • the identification information used to identify the neighboring cell includes but is not limited to:
  • the CS used to generate the reference signal of the SA of the neighboring cell
  • the identification information included in the data of the SA of the neighboring cell for identifying the neighboring cell is included in the data of the SA of the neighboring cell.
  • information for distinguishing the local cell and the neighboring cell may be added to the data of the SA, that is, the SA indication, for example, a 2-bit sector ID or a 9-bit Cell ID (as shown in Table 4 below). Show).
  • the terminal can identify whether the SA is from the current cell or the neighboring cell according to the sector ID carried in the SA or the Cell ID.
  • the SA indication does not include the identifier information for identifying the cell. Therefore, the terminal cannot identify whether the SA is a terminal in the current cell or a terminal in the neighboring cell.
  • the SA indicates The identifier information for identifying the neighboring cell is added. After receiving the SA, the terminal may identify that the SA is a terminal in the neighboring cell according to the identifier information used to identify the neighboring cell in the SA indication.
  • the scheme for identifying the SA sent by the neighboring cell is similar to the scheme of the Discovery by using any one or more of the foregoing seven types of information.
  • the scheme of the Discovery by using any one or more of the foregoing seven types of information.
  • the resource occupancy information is used to indicate the resource occupancy of the signal transmitted by the terminal in the neighboring cell to the transmission resource of the current cell, where the signal transmitted by the terminal in the neighboring cell is used to carry data to the current cell.
  • the resource occupancy information of the transmission resource is obtained by the terminal from the SA transmitted by the terminal in the received neighboring cell.
  • the terminal can learn the data resource corresponding to the SA from the T-RPT and the RA carried in the SA indication of the received SA, and identify the cell identifier information such as the sector ID or the Cell ID in the SA indication.
  • the data resource is a resource used by a terminal in a neighboring cell.
  • the terminal in the neighboring cell carries the identifier information for identifying the neighboring cell and the terminal identifies the signal transmitted by the neighboring cell.
  • the base station 501 notifies the terminal of the resource occupancy information of which transmission resources is reported is described.
  • Optional implementations of the solution include but are not limited to the following four types:
  • the base station 501 may send the transmission resource information of the current cell to the terminal 502, for example, broadcast the transmission resource information to the terminal 502 by using a system message. , indicating the transmission resources available to the terminal in the current cell.
  • the terminal 502 After receiving the transmission resource information, the terminal 502 determines, according to the received transmission resource information, a transmission resource that can be used by the terminal in the current cell when transmitting;
  • the terminal 502 receives the signal transmitted by the terminal in the neighboring cell on the determined available transmission resource, and measures the signal transmitted by the terminal in the received neighboring cell to obtain the resource occupancy information.
  • the base station 501 may send the transmission resource information of the current cell and the transmission resource information of the neighboring cell to the terminal 502, for example, through the system.
  • the message is sent to the terminal 502 for the two pieces of information.
  • the base station 501 may obtain the sending resource information of the neighboring cell from the base station where the neighboring cell is located by using the interaction between the base stations.
  • the sending resource information of the current cell is used to indicate the sending resource that can be used by the terminal in the current cell
  • the sending resource information of the neighboring cell is used to indicate the sending resource that can be used by the terminal in the neighboring cell.
  • the terminal 502 determines, according to the received transmission resource information of the current cell and the transmission resource information of the neighboring cell, that the transmission resource that can be used by the terminal in the current cell overlaps with the transmission resource that can be used by the terminal in the neighboring cell;
  • the terminal 502 receives the signal transmitted by the terminal in the neighboring cell on the determined overlapping transmission resource, and measures the signal transmitted by the terminal in the received neighboring cell to obtain the resource occupancy information.
  • the terminal 502 performs measurement only on the transmission resources in which the current cell and the neighboring cell have overlapping, and in the first mode, the terminal 502 performs measurement on the transmission resource of the current cell, and the measurement range is larger, so the method 2 and the mode 1 In comparison, the processing load of the terminal 502 is reduced.
  • the base station 501 Before the base station 501 receives the resource occupancy information of the neighboring cell of the current cell reported by the terminal 502 in the current cell, the base station 501 sends a measurement control instruction to the terminal in the current cell;
  • the measurement control command is used to control the terminal 502 to perform measurement on the designated transmission resource, where the designated transmission resource is overlapped between a transmission resource that can be used by the terminal in the current cell and a transmission resource that can be used by the terminal in the neighboring cell.
  • the transmission resource in the transmission resource for example, the transmission resource that can be used by the terminal in the current cell, includes: resource 1, resource 2, resource 3, and resource 4.
  • the transmission resources that the terminal in the neighboring cell can use include: resource 3, resource 4, and resource. 5.
  • the overlapping transmission resources between the current cell and the neighboring cell are resource 3 and resource 4. In mode 2, terminal 502 measures on resource 3 and resource 4, and in mode 3, terminal 502 specifies according to the measurement control instruction.
  • the resource is specified for measurement, such as on resource 3, or on resource 4, or on resource 3 and resource 4.
  • mode 3 specifies the specific transmission resource of the measurement, and the measurement is more targeted and more flexible.
  • the processing load of the terminal 502 can also be reduced.
  • the base station 501 receives the resources of the neighboring cell of the current cell reported by the terminal 502 in the current cell. Before the occupancy information, the base station 501 transmits the transmission resource information of the current cell and the transmission resource information of the neighboring cell to the terminal 502.
  • the sending resource information of the current cell is used to indicate the sending resource that can be used by the terminal in the current cell
  • the sending resource information of the neighboring cell is used to indicate the sending resource that can be used by the terminal in the neighboring cell.
  • the base station 501 sends the measurement control command to the terminal 502, and the measurement control command is used to start the terminal 502 to measure and report the resource occupation information, specifically:
  • the measurement control command initiation terminal 502 receives the transmission resource that can be used by the terminal in the current cell and the transmission resource that can be used by the terminal in the neighboring cell, and transmits the terminal in the neighboring cell on the overlapping transmission resource.
  • the signal is measured, and the received signal of the terminal in the neighboring cell is measured to obtain and report the resource occupancy information.
  • the transmission resource is not specified in the measurement control command, and the transmission resource that the terminal 502 needs to measure is the transmission resource information of the current cell and the transmission resource information of the neighboring cell that the terminal 502 pre-transmits according to the base station 501. And determining that the current cell and the neighboring cell have overlapping transmission resources, and measuring the determined transmission resources that are overlapped.
  • the terminal 502 may start measuring and reporting the measured resource occupancy information after receiving the transmission resource information sent by the base station 501, for example, after receiving the system message; Alternatively, the terminal 502 starts the measurement when the receiving quality of the terminal is reduced to a certain threshold. For example, the error rate is higher than the preset error rate threshold, so the measurement is regarded as being initiated by the terminal 502.
  • the base station 501 may send a measurement control command to the terminal 502 to perform measurement on the specified transmission resource when the terminal 502 is required to report the resource occupation information, so that the mode 3 and the mode 4 may be regarded as being started by the base station 501.
  • the measurement and resource occupancy information is reported.
  • the terminal 502 may report the periodic report or the event triggering, for example, when the error rate is higher than the preset error rate threshold.
  • the transmission resource pool of the neighboring cell may overlap, that is, a part of the transmission resources that the terminal in the current cell can use, possibly adjacent to the current cell. Some of the transmission resources available to the terminals in the cell are the same. Therefore, in the first embodiment, the terminal 502 reports the resource occupancy information, and indicates that the signal transmitted by the terminal in the neighboring cell is occupied by the transmission resource that can be used by the terminal in the current cell. The following describes an example of the distribution of the transmission resources in the neighboring cells and the information about the resource occupancy information reported by the terminal.
  • the message flow of the base station 501 notifying the terminal 502 to send the resource information and the terminal 502 reporting the resource occupation status information is exemplified by the fifth embodiment and the sixth embodiment.
  • the solution provided in the second embodiment is applicable to Discovery and SA.
  • the DMRS of the Discovery and/or the SA between the neighboring cells adopts different CSs, and the terminal 502 detects the signal by using different CSs, so that whether the signal is from the neighboring cell can be identified.
  • the maximum number of CSs supported by the LTE system is eight.
  • the base station 501 notifies the CS of the current cell to the terminal 502 in the current cell by using system message broadcast or RRC signaling, and the terminal 502 in the current cell detects each resource of the Discovery resource pool, thereby identifying which resources are Neighboring cell occupation.
  • the manner in which the terminal 502 is detecting may include, but is not limited to, the following two methods:
  • the terminal 502 performs blind detection on the CSs of different DMRSs until the DMRS is successfully demodulated.
  • the advantage of the first method is that no neighbor cell information interaction is required.
  • the disadvantage is that all possible CSs need to be tested, which increases the processing delay and The complexity of the implementation.
  • the neighboring cell exchanges the information of the CS of the DMRS, and the base station 501 broadcasts the information of the CS of the local cell and the neighboring cell to the terminal 502 in the current cell through system message broadcast or through RRC signaling, and the terminal 502 in the current cell preferentially receives the received Discovery.
  • all cells can be divided into three groups, Cell A, Cell B, and Cell C.
  • the three different CSs are respectively used to generate the DMRS of the Discovery signal of the three groups of cells, and the CS between the adjacent cells is different.
  • the terminal 502 detects the Discovery with different CSs, so that it can be identified whether the Discovery signal is from the current cell or the neighboring cell.
  • the solution provided in the third embodiment is applicable to Discovery and SA.
  • different cell identifiers and/or user equipment identifiers are used between neighboring cells when generating a scrambling sequence that scrambles data of Discovery and/or SA.
  • the terminal 502 When detecting the signal, the terminal 502 performs descrambling using the descrambling sequence corresponding to the scrambling sequence to identify whether the signal is sent by the terminal 502 in the neighboring cell.
  • the scrambling sequence/descrambling sequence of Discovery sent by the terminal 502 is determined by the cell ID and the RNTI, wherein the descrambling is the opposite process of scrambling, receiving The terminal uses the same scrambling sequence as the transmitting end to descramble the received signal to implement data reception.
  • the Cell ID is fixed at 510, and the Radio Network Temporary Identificaiton (RNTI) is fixed to 0. Therefore, the scrambling sequence/descrambling sequence of Discovery of different cells is the same. .
  • the Cell ID or the RNTI of the neighboring cell may be set to a different value, or the combination of the Cell ID and the RNTI of the neighboring cell may be set to a different value, so that the generated The scrambling sequence/descrambling sequence is also different, so that the terminal 502 accesses data through Discovery, ie It can be identified whether the Discovery is sent by a neighboring cell.
  • RNTI Radio Network Temporary Identificaiton
  • the Cell ID may be a cell identifier of the neighboring cell, or may be other information, as long as the neighboring cell can be distinguished. For example, when different Cell IDs and the same RNTI are configured for neighboring cells, the cell IDs are set to 1 to 7 for the neighboring seven cells, and then the scrambling sequence of the neighboring cells generated by the Cell ID is/ The descrambling sequence will also be different.
  • the RNTI is a type of the user equipment identifier, and may be an identifier of the user equipment in the neighboring cell, or may be other information, as long as the neighboring cell can be distinguished.
  • the neighboring cells are configured with the same Cell ID, different RNTIs, and for the adjacent three cells, the RNTIs can be set to 1 to 3 respectively, then the scrambling sequence/descrambling of the neighboring cells generated by the RNTIs The sequence will also be different.
  • the third implementation is also applicable to the grouping of two adjacent cells shown in FIGS. 8 and 9.
  • the solution provided in the fourth embodiment is applicable to the Discovery and the SA, and the CRC of the Discovery or the SA is masked to implement identification of the cell.
  • the mask is:
  • the mask is:
  • the mask is:
  • the terminal 502 passes the BSR to the base station 501 (such as an eNB) where the current cell is located. Report resource occupancy information.
  • the base station 501 such as an eNB
  • Embodiment 5 includes the following steps:
  • the base station where the neighboring cell is located sends the information about the resource pool of the neighboring cell to the base station 501 where the current cell is located, for example, the sending resource information of the sending resource that the terminal in the neighboring cell can use;
  • the base station 501 where the current cell is located broadcasts information about the resource pool of the current cell to the terminal 502 in the current cell, for example, the transmission resource information of the transmission resource that the terminal in the current cell can use, and the information of the resource pool of the neighboring cell;
  • the base station 501 where the current cell is located sends a measurement control command to the terminal 502, such as RRC signaling: RRC reconfiguration, where the RRC signaling carries the measurement control information MeasurementConfig, and starts terminal measurement.
  • RRC signaling RRC reconfiguration, where the RRC signaling carries the measurement control information MeasurementConfig, and starts terminal measurement.
  • the terminal 502 sends an RRC reconfiguration complete (RRCReconfigurationcomplete) in response to the RRC reconfiguration.
  • RRCReconfigurationcomplete RRC reconfiguration complete
  • S1005 The terminal 502 starts measuring, and listens to signals from neighboring cells.
  • S1006 When the terminal 502 needs to report the resource occupation information, the terminal 502 sends a scheduling request (Scheduling Request, SR) to the base station 501 where the current cell is located.
  • SR scheduling request
  • the base station 501 where the current cell is located receives the D2D grant (D2D grant) to the terminal 502 after receiving the SR;
  • the terminal 502 sends a BSR to the base station 501 where the current cell is located, where the resource occupancy information is carried.
  • the base station 501 where the current cell is located allocates D2D resources to the terminal 502 according to the resource occupancy information.
  • the terminal 502 reports the resource occupation status information to the base station 501 (for example, an eNB) where the current cell is located through the RRC signaling.
  • the base station 501 for example, an eNB
  • Embodiment 6 includes the following steps:
  • the base station where the neighboring cell is located sends the information about the resource pool of the neighboring cell to the base station 501 where the current cell is located, for example, the sending resource information of the sending resource that the terminal 502 in the neighboring cell can use;
  • the base station 501 where the current cell is located broadcasts information about the resource pool of the current cell to the terminal in the current cell, for example, the sending resource information of the sending resource that the terminal in the current cell can use, and the information of the resource pool of the neighboring cell;
  • S1103 The base station 501 where the current cell is located sends a measurement control command to the terminal 502, such as RRC signaling: RRC reconfiguration, which carries the measurement control information MeasurementConfig, and starts terminal measurement.
  • RRC signaling RRC reconfiguration, which carries the measurement control information MeasurementConfig, and starts terminal measurement.
  • the terminal 502 sends an RRC reconfiguration complete (RRCReconfigurationcomplete) in response to the RRC reconfiguration.
  • RRCReconfigurationcomplete RRC reconfiguration complete
  • S1105 The terminal 502 starts measuring, and listens to signals from neighboring cells.
  • S1106 When the terminal 502 has the resource occupancy information to be reported, the terminal 502 sends a scheduling request (Scheduling Request, SR) to the base station 501 where the current cell is located.
  • SR scheduling request
  • the base station 501 where the current cell is located receives the D2D grant (D2D grant) to the terminal 502 after receiving the SR;
  • S1108 The terminal 502 sends a BSR to the base station 501 where the current cell is located.
  • the terminal 502 reports the resource occupation status information to the base station 501 where the current cell is located through the RRC signaling.
  • the base station 501 where the current cell is located allocates D2D resources to the terminal 502 according to the resource occupancy information.
  • an embodiment of the present invention further provides a terminal, a base station, and a resource allocation method.
  • the principle of solving the problem is similar to the D2D system provided in Embodiment 1.
  • the implementation may refer to the implementation of the D2D system, and some of the options are optional.
  • reference may also be made to the second embodiment to the sixth embodiment, and the repeated description is omitted.
  • FIG. 12 is a schematic structural diagram of a terminal in a current cell in a D2D system according to Embodiment 7 of the present invention. As shown in FIG. 12, the terminal includes:
  • the processing module 1201 is configured to determine resource occupation information of a neighboring cell of the current cell.
  • the transceiver module 1202 is configured to report resource occupancy information to the base station in the D2D system.
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell.
  • the signal transmitted by the terminal in the neighboring cell includes at least one of the following signals:
  • the transmission resources usable by the terminal in the current cell include at least one of the following resources:
  • the transmission resource of Discovery the transmission resource of the SA, and the transmission resource of the signal for carrying the data.
  • the processing module 1201 is specifically configured to:
  • the resource occupancy information is obtained by measuring the received Discovery.
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the transmission resource that can be used by the terminal in the current cell when the Discovery is sent.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • the base sequence used to generate the reference signal of the Discovery of the neighboring cell is the base sequence used to generate the reference signal of the Discovery of the neighboring cell
  • the cyclic offset CS used when generating the reference signal of the Discovery of the neighboring cell
  • the orthogonal cover code OCC used when generating the reference signal of the Discovery of the neighboring cell
  • the identification information included in the data of the neighboring cell for identifying the neighboring cell is included in the data of the neighboring cell.
  • the processing module 1201 is specifically configured to:
  • the resource occupancy information is obtained by measuring the received SA.
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell is small when transmitting the SA.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • the CS used to generate the reference signal of the SA of the neighboring cell
  • the identification information included in the data of the SA of the neighboring cell for identifying the neighboring cell is included in the data of the SA of the neighboring cell.
  • the processing module 1201 is specifically configured to:
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the transmission resource that can be used by the terminal in the current cell when transmitting the signal for carrying data.
  • processing module 1201 determines resource occupancy information of the neighboring cell of the current cell.
  • the transceiver module 1202 is further configured to: receive, by the base station, the sending resource information of the current cell, where the sending resource information of the current cell is used to indicate a sending resource that is available to the terminal in the current cell;
  • the processing module 1201 is further configured to: according to the sending resource information of the current cell received by the transceiver module 1202, determine a sending resource that can be used when the terminal in the current cell transmits a signal in the current cell;
  • the processing module 1201 is specifically configured to:
  • the control transceiver module 1202 receives the signal transmitted by the terminal in the neighboring cell on the determined available transmission resource, and obtains resource occupancy information by measuring the received signal.
  • the transceiver module 1202 is further configured to: before the processing module 1201 determines resource occupancy information of the neighboring cell of the current cell,
  • the sending resource information of the current cell is used to notify the sending resource that the terminal in the current cell can use
  • the sending resource information of the neighboring cell is used to notify the sending resource that the terminal in the neighboring cell can use
  • the processing module 1201 is further configured to: according to the sending resource information of the current cell and the sending resource information of the neighboring cell received by the transceiver module 1202, determine a sending resource that can be used by the terminal in the current cell and a sending resource that can be used by the terminal in the neighboring cell. Have overlaps;
  • the processing module 1201 is specifically configured to: control the transceiver module 1202 to receive the signal transmitted by the terminal in the neighboring cell on the determined overlapping transmission resource, and obtain the resource occupancy information by measuring the received signal.
  • processing module 1201 determines resource occupancy information of the neighboring cell of the current cell.
  • the transceiver module 1202 is further configured to: receive a measurement control command sent by the base station, where the measurement control command is used to control the terminal in the current cell to perform measurement on the designated sending resource, and specify that the sending resource is a sending resource and a neighbor that can be used by the terminal in the current cell.
  • the processing module 1201 is specifically configured to:
  • the control transceiver module 1202 receives the information sent by the terminal in the neighboring cell on the designated transmission resource, and obtains the resource occupancy information by measuring the received signal.
  • processing module 1201 determines resource occupancy information of the neighboring cell of the current cell.
  • the transceiver module 1202 is further configured to: receive, by the base station, the sending resource information of the current cell and the sending resource information of the neighboring cell, where the sending resource information of the current cell is used to indicate the sending resource that the terminal in the current cell can use, and the neighboring cell
  • the transmission resource information is used to indicate a transmission resource that is available to the terminal in the neighboring cell;
  • the terminal in the current cell overlaps the transmission resource that can be used by the terminal in the current cell and the transmission resource that can be used by the terminal in the neighboring cell, the terminal transmits the signal transmitted by the terminal in the neighboring cell on the overlapping transmission resource. And by measuring the received signal, the resource is occupied. Situation information.
  • the resource occupancy information includes at least one of the following information:
  • the identification information of the K resources with the highest interference level, K is a positive integer
  • Identification information of resources that are not occupied by neighboring cells are not occupied by neighboring cells.
  • the transceiver module 1202 is specifically configured to:
  • the resource occupancy information is reported to the base station in the buffer status report BSR or the radio resource control RRC signaling.
  • FIG. 13 is a schematic structural diagram of a terminal according to Embodiment 8 of the present invention. As shown in FIG. 13, the terminal includes:
  • the processor 1301 is configured to determine resource occupancy information of a neighboring cell of the current cell.
  • the transceiver 1302 is configured to report resource occupation information to the base station in the D2D system.
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell.
  • the terminal can be implemented in a structure as shown in FIG. 13, wherein the transceiver 1302 is directly connected to the processor 1301.
  • a bus architecture may be employed, and both processor 1301 and transceiver 1302 are coupled to the bus for communication over the bus.
  • the terminal may also include a memory, a user interface, etc., and if the structure shown in FIG. 13 is employed, these devices may be directly connected to the processor 1301.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by various circuits of one or more processors and memories represented by processor 1301.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver 1302 can be multiple components, ie, a package A transmitter and receiver are provided to provide means for communicating with various other devices on a transmission medium.
  • the terminal may also include a user interface connected to the bus or an externally connectable device, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • FIG. 14 is a schematic structural diagram of a base station in a D2D system according to Embodiment 9 of the present invention. As shown in FIG. 14, the base station includes:
  • the transceiver module 1401 is configured to receive resource occupancy information of a neighboring cell of a current cell reported by a terminal in a current cell in the D2D system;
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell;
  • the processing module 1402 is configured to allocate, according to the resource occupancy information received by the transceiver module 1401, a transmission resource for the terminal in the current cell.
  • the signal transmitted by the terminal in the neighboring cell includes at least one of the following signals:
  • the transmission resources usable by the terminal in the current cell include at least one of the following resources:
  • the transmission resource of Discovery the transmission resource of the SA, and the transmission resource of the signal for carrying the data.
  • the resource occupancy information is specifically used to indicate: the usage of the sending resource that can be used by the terminal in the current cell when the terminal in the neighboring cell sends the Discovery;
  • the terminal in the neighboring cell carries the identification information for identifying the neighboring cell when transmitting the Discovery.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • the base sequence used to generate the reference signal of the Discovery of the neighboring cell is the base sequence used to generate the reference signal of the Discovery of the neighboring cell
  • the cyclic offset CS used when generating the reference signal of the Discovery of the neighboring cell
  • the orthogonal cover code OCC used when generating the reference signal of the Discovery of the neighboring cell
  • the identification information included in the data of the neighboring cell for identifying the neighboring cell is included in the data of the neighboring cell.
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the sending resource that is available to the terminal in the current cell when the SA is sent;
  • the terminal in the neighboring cell carries the identifier information for identifying the neighboring cell when transmitting the SA.
  • the cell identity information includes at least one of the following information:
  • the CS used to generate the reference signal of the SA of the neighboring cell
  • the identification information included in the data of the SA of the neighboring cell for identifying the neighboring cell is included in the data of the SA of the neighboring cell.
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell sends a signal for carrying data to the current cell.
  • the resource occupancy information is obtained by the terminal from the SA sent by the terminal in the received neighboring cell.
  • the transceiver module 1401 is further configured to: before receiving the resource occupation information of the neighboring cell of the current cell reported by the terminal in the current cell,
  • the resource occupancy information received by the transceiver module 1401 is received by the terminal in the current cell.
  • the transmission resource information of the current cell determines a transmission resource that can be used when transmitting in the current cell, receives a signal transmitted by the terminal in the neighboring cell on the determined available transmission resource, and measures the received signal. of.
  • the transceiver module 1401 is further configured to: before receiving the resource occupation information of the neighboring cell of the current cell reported by the terminal in the current cell,
  • the transmission resource information of the current cell and the transmission resource information of the neighboring cell sent by the terminal in the current cell where the transmission resource information of the current cell is used to indicate the transmission resource that the terminal in the current cell can use, and the transmission resource information of the neighboring cell a transmission resource used to indicate that a terminal in a neighboring cell can be used;
  • the resource occupancy information received by the transceiver module 1401 is that the terminal in the current cell determines, according to the received transmission resource information of the current cell and the transmission resource information of the neighboring cell, the transmission resource that can be used by the terminal in the current cell and the neighboring cell.
  • the transmission resources that can be used by the terminal are overlapped; the signal transmitted by the terminal in the neighboring cell is received on the determined overlapping transmission resource, and the received signal is measured.
  • the transceiver module 1401 is further configured to: before receiving the resource occupation information of the neighboring cell of the current cell reported by the terminal in the current cell,
  • the measurement control command is used to control the terminal in the current cell to perform measurement on the specified transmission resource
  • the designated transmission resource is a transmission resource that can be used by the terminal in the current cell and a terminal in the neighboring cell. Resources in the transmitted resources that overlap between the available transmission resources;
  • the resource occupancy information received by the transceiver module 1401 is that the terminal in the current cell receives the signal transmitted by the terminal in the neighboring cell on the designated transmission resource, and measures the received signal.
  • the transceiver module 1401 is further configured to: before receiving the resource occupation information of the neighboring cell of the current cell reported by the terminal in the current cell,
  • a measurement control command sent to a terminal in the current cell, and the measurement control instruction is used to:
  • the terminal in the current cell overlaps the transmission resource that can be used by the terminal in the current cell and the transmission resource that can be used by the terminal in the neighboring cell, the terminal transmits the signal transmitted by the terminal in the neighboring cell on the overlapping transmission resource. And measuring the received signal to obtain resource occupancy information.
  • the resource occupancy information includes at least one of the following information:
  • the identification information of the K resources with the highest interference level, K is a positive integer
  • Identification information of resources that are not occupied by neighboring cells are not occupied by neighboring cells.
  • the transceiver module 1401 is specifically configured to:
  • processing module 1402 is specifically configured to:
  • the transmission resource that is interfered by the neighboring cell in the current cell is preferentially allocated to the terminal located at the cell edge in the current cell.
  • FIG. 15 is a schematic structural diagram of a base station according to Embodiment 10 of the present invention. As shown in FIG. 15, the base station includes:
  • the transceiver 1501 is configured to receive resource occupation information of a neighboring cell of a current cell reported by a terminal in a current cell in the D2D system;
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell;
  • the processor 1502 is configured to: according to the resource occupancy information received by the transceiver 1501, the current small The terminal in the area allocates transmission resources.
  • the base station can be implemented in a configuration as shown in FIG. 15, wherein the transceiver 1501 is directly connected to the processor 1502.
  • a bus architecture may be employed, and both processor 1502 and transceiver 1501 are coupled to the bus for communication over the bus.
  • the base station may also include a memory, a user interface, etc., which may be directly coupled to the processor 1502 if employed in the configuration shown in FIG.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors and various circuits of memory represented by processor 1502.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver 1501 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the base station may also include a user interface connected to the bus or an externally connectable device, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • FIG. 16 is a flowchart of a resource allocation method in a D2D system according to Embodiment 11 of the present invention. As shown in FIG. 16, the method includes the following steps:
  • S1601 The terminal in the current cell in the D2D system determines the resource occupation information of the neighboring cell of the current cell;
  • S1602 The terminal in the current cell reports the resource occupation information to the base station in the D2D system.
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell.
  • the signal transmitted by the terminal in the neighboring cell includes at least one of the following signals:
  • the transmission resources usable by the terminal in the current cell include at least one of the following resources:
  • the transmission resource of Discovery the transmission resource of the SA, and the transmission resource of the signal for carrying the data.
  • the terminal in the current cell in the D2D system in the step S1601 determines the resource occupation information of the neighboring cell of the current cell, including:
  • the terminal When the terminal in the current cell in the D2D system determines that the received Discovery carries the identifier information for identifying the neighboring cell, the terminal collects the received Discovery to obtain the resource occupancy information.
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the transmission resource that can be used by the terminal in the current cell when the Discovery is sent.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • the base sequence used to generate the reference signal of the Discovery of the neighboring cell is the base sequence used to generate the reference signal of the Discovery of the neighboring cell
  • the cyclic offset CS used when generating the reference signal of the Discovery of the neighboring cell
  • the orthogonal cover code OCC used when generating the reference signal of the Discovery of the neighboring cell
  • the identification information included in the data of the neighboring cell for identifying the neighboring cell is included in the data of the neighboring cell.
  • the terminal in the current cell in the D2D system in step S1601 determines the resource occupation information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system determines that the received SA carries the identifier information for identifying the neighboring cell, the terminal obtains the resource occupancy information by measuring the received SA.
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the transmission resource that can be used by the terminal in the current cell when the SA is sent.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • the CS used to generate the reference signal of the SA of the neighboring cell
  • the identification information included in the data of the SA of the neighboring cell for identifying the neighboring cell is included in the data of the SA of the neighboring cell.
  • the terminal in the current cell in the D2D system in step S1601 determines the resource occupancy information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system obtains resource occupation information from the SA sent by the terminal in the received neighboring cell;
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the transmission resource that can be used by the terminal in the current cell when transmitting the signal for carrying data.
  • the method before the determining, in step S1601, the terminal in the current cell in the D2D system, the resource occupancy information of the neighboring cell of the current cell, the method further includes:
  • the terminal in the current cell in the D2D system receives the transmission resource information of the current cell sent by the base station, and the transmission resource information of the current cell is used to indicate the transmission resource that the terminal in the current cell can use;
  • the terminal in the current cell determines, according to the received transmission resource information of the current cell, a transmission resource that can be used when transmitting a signal in the current cell;
  • step S1601 the terminal in the current cell in the D2D system determines the resource occupation information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system receives the signal transmitted by the terminal in the neighboring cell on the determined available transmission resource, and obtains resource occupancy information by measuring the received signal.
  • the method before the determining, in step S1601, the terminal in the current cell in the D2D system, the resource occupancy information of the neighboring cell of the current cell, the method further includes:
  • the terminal in the current cell in the D2D system receives the transmission resource information of the current cell and the transmission resource information of the neighboring cell, and the transmission resource information of the current cell is used to notify the terminal of the current cell that the terminal can use the transmission resource.
  • the sending resource information of the neighboring cell is used to notify the sending resource that the terminal in the neighboring cell can use;
  • the terminal in the current cell in the D2D system determines, according to the received transmission resource information of the current cell and the transmission resource information of the neighboring cell, the transmission resource that can be used by the terminal in the current cell and the transmission resource that can be used by the terminal in the neighboring cell. overlapping;
  • step S1601 the terminal in the current cell in the D2D system determines the resource occupation information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system receives the signal transmitted by the terminal in the neighboring cell on the determined overlapping transmission resource, and obtains the resource occupation information by measuring the received signal.
  • the method before the determining, in step S1601, the terminal in the current cell in the D2D system, the resource occupancy information of the neighboring cell of the current cell, the method further includes:
  • the terminal in the current cell in the D2D system receives the measurement control command sent by the base station, and the measurement control command is used to control the terminal in the current cell to perform measurement on the designated transmission resource, and the designated transmission resource is a transmission resource that can be used by the terminal in the current cell. a resource in a transmission resource that overlaps with a transmission resource usable by a terminal in a neighboring cell;
  • step S1601 the terminal in the current cell in the D2D system determines the resource occupation information of the neighboring cell of the current cell, including:
  • the terminal in the current cell in the D2D system receives the information sent by the terminal in the neighboring cell on the designated sending resource, and obtains the resource occupation information by measuring the received signal.
  • the method before determining, by the terminal in the current cell in the D2D system, the resource occupancy information of the neighboring cell of the current cell in the step S1601, the method further includes:
  • the terminal in the current cell in the D2D system receives the transmission resource information of the current cell and the transmission resource information of the neighboring cell, where the transmission resource information of the current cell is used to indicate the transmission resource that the terminal in the current cell can use.
  • the transmission resource information of the neighboring cell is used to indicate the neighboring cell.
  • step S1601 the terminal in the current cell in the D2D system receives the measurement control command sent by the base station, and the measurement control instruction is used to:
  • the terminal in the current cell overlaps the transmission resource that can be used by the terminal in the current cell and the transmission resource that can be used by the terminal in the neighboring cell, the terminal transmits the signal transmitted by the terminal in the neighboring cell on the overlapping transmission resource. And by measuring the received signal, the resource occupancy information is obtained.
  • the resource occupancy information includes at least one of the following information:
  • the identification information of the K resources with the highest interference level, K is a positive integer
  • Identification information of resources that are not occupied by neighboring cells are not occupied by neighboring cells.
  • step S1602 the terminal in the current cell reports the determined resource occupation information to the base station in the D2D system, including:
  • the terminal in the current cell reports the resource occupancy information to the base station in the buffer status report BSR or the radio resource control RRC signaling.
  • FIG. 17 is a flowchart of a resource allocation method in a D2D system according to Embodiment 12 of the present invention. As shown in FIG. 17, the method includes the following steps:
  • the base station in the D2D system receives the resource occupation information of the neighboring cell of the current cell reported by the terminal in the current cell.
  • the resource occupancy information is used to indicate that the signal transmitted by the terminal in the neighboring cell is occupied by the sending resource that can be used by the terminal in the current cell;
  • S1702 The base station allocates a sending resource to the terminal in the current cell according to the received resource occupancy information.
  • the signal transmitted by the terminal in the neighboring cell includes at least one of the following signals:
  • the transmission resources usable by the terminal in the current cell include at least one of the following resources:
  • the transmission resource of Discovery the transmission resource of the SA, and the transmission resource of the signal for carrying the data.
  • the resource occupancy information is specifically used to indicate: the usage of the sending resource that can be used by the terminal in the current cell when the terminal in the neighboring cell sends the Discovery;
  • the terminal in the neighboring cell carries the identification information for identifying the neighboring cell when transmitting the Discovery.
  • the identifier information used to identify the neighboring cell includes at least one of the following information:
  • the base sequence used to generate the reference signal of the Discovery of the neighboring cell is the base sequence used to generate the reference signal of the Discovery of the neighboring cell
  • the cyclic offset CS used when generating the reference signal of the Discovery of the neighboring cell
  • the orthogonal cover code OCC used when generating the reference signal of the Discovery of the neighboring cell
  • the identification information included in the data of the neighboring cell for identifying the neighboring cell is included in the data of the neighboring cell.
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell uses the sending resource that is available to the terminal in the current cell when the SA is sent;
  • the terminal in the neighboring cell carries the identifier information for identifying the neighboring cell when transmitting the SA.
  • the cell identity information includes at least one of the following information:
  • the CS used to generate the reference signal of the SA of the neighboring cell
  • the identification information included in the data of the SA of the neighboring cell for identifying the neighboring cell is included in the data of the SA of the neighboring cell.
  • the resource occupancy information is specifically used to indicate that the terminal in the neighboring cell sends a signal for carrying data to the current cell.
  • the resource occupancy information is obtained by the terminal from the SA sent by the terminal in the received neighboring cell.
  • step S1701 before the base station in the D2D system receives the resource occupation information of the neighboring cell of the current cell reported by the terminal in the current cell, the method further includes:
  • the base station sends the transmission resource information of the current cell to the terminal in the current cell, where the transmission resource information of the current cell is used to indicate the transmission resource that the terminal in the current cell can use;
  • the resource occupancy information received by the base station is that the terminal in the current cell determines, according to the received resource information of the current cell, the transmission resource that can be used when transmitting in the current cell, and receives the neighbor on the determined available transmission resource.
  • step S1701 before the base station in the D2D system receives the resource occupation information of the neighboring cell of the current cell reported by the terminal in the current cell, the method further includes:
  • the information is used to indicate a sending resource that is available to the terminal in the neighboring cell
  • the resource occupancy information received by the base station is that the terminal in the current cell determines, according to the received transmission resource information of the current cell and the transmission resource information of the neighboring cell, the transmission resource that can be used by the terminal in the current cell and the terminal in the neighboring cell.
  • the transmit resources that can be used are overlapped; the signals transmitted by the terminals in the neighboring cells are received on the determined overlapping transmission resources, and the received signals are measured.
  • the base station in the D2D system receives the terminal reported by the terminal in the current cell.
  • the method further includes:
  • the base station sends a measurement control command to the terminal in the current cell, where the measurement control command is used to control the terminal in the current cell to perform measurement on the designated transmission resource, and the designated transmission resource is a transmission resource that can be used by the terminal in the current cell and the neighboring cell. a resource in a transmission resource that overlaps between transmission resources that the terminal can use;
  • the resource occupancy information received by the base station is that the terminal in the current cell receives the signal transmitted by the terminal in the neighboring cell on the designated transmission resource, and measures the received signal.
  • step S1701 before the base station in the D2D system receives the resource occupation information of the neighboring cell of the current cell reported by the terminal in the current cell, the method further includes:
  • the base station sends the transmission resource information of the current cell and the transmission resource information of the neighboring cell to the terminal in the current cell, where the transmission resource information of the current cell is used to indicate the transmission resource that the terminal in the current cell can use, and the transmission resource information of the neighboring cell.
  • the transmission resource information of the current cell is used to indicate the transmission resource that the terminal in the current cell can use, and the transmission resource information of the neighboring cell.
  • a transmission resource used to indicate that a terminal in a neighboring cell can be used;
  • a measurement control command sent by the base station to a terminal in the current cell, and the measurement control instruction is used to:
  • the terminal in the current cell overlaps the transmission resource that can be used by the terminal in the current cell and the transmission resource that can be used by the terminal in the neighboring cell, the terminal transmits the signal transmitted by the terminal in the neighboring cell on the overlapping transmission resource. And measuring the received signal to obtain resource occupancy information.
  • the resource occupancy information includes at least one of the following information:
  • the identification information of the K resources with the highest interference level, K is a positive integer
  • Identification information of resources that are not occupied by neighboring cells are not occupied by neighboring cells.
  • the base station in the D2D system receives the resource occupation information of the neighboring cell of the current cell reported by the terminal in the current cell, including:
  • the base station receives the resource occupation information reported by the terminal in the current cell in the buffer status report BSR or the radio resource control RRC signaling.
  • the base station is current according to the received resource occupancy information.
  • the terminal in the area allocates transmission resources, including:
  • the base station preferentially allocates the transmission resource in the current cell that is interfered by the neighboring cell to the terminal located at the cell edge in the current cell.
  • the terminal in the current cell reports the resource reporting situation of the neighboring cell of the current cell to the base station, and the delay reported by the terminal to the base station is usually much smaller than the transmission delay of the X2 interface, so Some problems are based on the X2 interface exchanging information related to inter-cell interference.
  • the terminal since the terminal directly communicates with the terminal in the D2D system, the resource occupancy information of the neighboring cell of the current cell reported by the terminal to the base station is compared with the existing cell exchanged between the base stations through the X2 interface. Compared with the method of interfering with related information, the terminal can more accurately reflect the interference of the terminal. Therefore, the base station performs resource allocation based on the resource occupancy information reported by the terminal, and can effectively avoid interference of the terminal in the D2D system. The terminal can report the measured interference information to the base station in real time, and the delay is usually much smaller than the transmission delay through the X2 interface. Therefore, the technical solution provided by the embodiment of the present invention is more suitable for interference coordination between cells in the D2D system.
  • the base station may send, in advance, the sending resource information used to indicate the available transmission resources of the terminal in the current cell to the terminal in the current cell, and indicate that the terminal in the current cell is in the available sending resource.
  • the signal received by the terminal in the neighboring cell is received, and the received signal is measured to obtain the resource occupancy information.
  • the terminal in the neighboring cell may carry the identifier information, such as the discovery, the scheduling, and the data, and the identifier information of the neighboring cell.
  • the terminal in the current cell can learn that the received signal is from the neighboring cell, and in the existing D2D system, the terminal in the current cell and the neighboring cell does not carry the cell identification information when transmitting the signal, so that In the D2D system, the terminal cannot distinguish whether the received signal is transmitted by the terminal in the current cell or the neighboring cell.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention may be employed in one or more A computer program product embodied on a computer usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • a computer usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

La présente invention se rapporte au domaine technique des communications sans fil, et concerne plus particulièrement un terminal, une station de base et un procédé d'attribution de ressources, destinés à résoudre le problème lié à un retard important dans la commutation d'informations pertinentes pour des interférences intercellulaires au moyen d'une interface X2, appliqués à un système présentant une plus grande exigence de retard, tel que l'internet des véhicules, et pouvant attribuer raisonnablement des ressources et réduire efficacement les interférences intercellulaires. Dans un terminal selon des modes de réalisation de la présente invention, un module de traitement détermine des informations de situation d'occupation de ressources concernant une cellule voisine d'une cellule courante dans un système D2D ; et un module émetteur-récepteur signale les informations de situation d'occupation des ressources à une station de base dans le système D2D, et indique une situation d'occupation, au moyen d'un signal émis par un terminal dans la cellule voisine, de ressources d'envoi qui peuvent être utilisées par un terminal dans la cellule courante. Le terminal dans la cellule courante signale une situation de rapport de ressources de la cellule voisine de la cellule courante à la station de base, et un retard provoqué par le signalement du terminal à la station de base est habituellement très inférieur à un retard d'émission d'une interface X2. Par conséquent, il est possible de résoudre le problème de l'état de la technique lié à un retard important dans la commutation d'informations pertinentes pour des interférences intercellulaires sur la base d'une interface X2.
PCT/CN2015/080372 2015-05-29 2015-05-29 Terminal, station de base et procédé d'attribution de ressources WO2016191965A1 (fr)

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CN201580061955.0A CN107113293B (zh) 2015-05-29 2015-05-29 一种终端、基站，以及资源分配方法

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CN104661177A (zh) * 2015-03-12 2015-05-27 深圳酷派技术有限公司 一种实现d2d通信的方法、系统及设备

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