WO2015042915A1 - Procédé et dispositif d'envoi et de réception de données - Google Patents

Procédé et dispositif d'envoi et de réception de données Download PDF

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Publication number
WO2015042915A1
WO2015042915A1 PCT/CN2013/084610 CN2013084610W WO2015042915A1 WO 2015042915 A1 WO2015042915 A1 WO 2015042915A1 CN 2013084610 W CN2013084610 W CN 2013084610W WO 2015042915 A1 WO2015042915 A1 WO 2015042915A1
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Prior art keywords
signal
message
sequence
receiving end
size
Prior art date
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PCT/CN2013/084610
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English (en)
Chinese (zh)
Inventor
武雨春
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.)
Filing date
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/CN2013/084610 priority Critical patent/WO2015042915A1/fr
Priority to CN201380011857.7A priority patent/CN104685814B/zh
Publication of WO2015042915A1 publication Critical patent/WO2015042915A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • D2D Device to Device
  • D2D Discovery D2D Discovery
  • D2D Communication D2D Communication
  • two or more parties to the communication must first discover each other and synchronize with each other before they can start communication.
  • the two or more parties of the communication may be synchronous (Synchronous) or asynchronous (Asynchronous). Therefore, the transmitting end needs to receive and receive first. Synchronization can be done to communicate. Summary of the invention
  • a method of transmitting a signal comprising:
  • the transmitting end generates a signal, where the signal includes a first signal and a second signal, the first signal is at least one sequence in a preset sequence set, and the second signal is information used to carry parameters required for communication. ;
  • the transmitting end sends the signal to the receiving end, so that the receiving end synchronizes the message with the transmitting end by detecting the first signal and the transmitting end to synchronize.
  • the method further includes: pre-setting a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the method further includes: And time-frequency resources occupied by the first signal are uniformly distributed in a time-frequency resource occupied by the second signal.
  • a second aspect a method of receiving a signal, the method comprising:
  • a signal sent by the transmitting end where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is required for carrying communication Parameter information Message;
  • the receiving end detects that the first signal is synchronized with the sending end
  • the receiving end demodulates the message and communicates with the transmitting end.
  • the method further includes: the receiving end, according to the at least one sequence in the preset first signal, and the message size in the signal. Corresponding relationship, obtaining the size of the message.
  • the method further includes: acquiring a channel estimation value of the message according to the first signal.
  • the method further includes:
  • the third aspect a sending end, where the sending end includes:
  • a generating unit configured to generate a signal, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is a parameter required for carrying communications Message
  • a sending unit configured to send the signal to the receiving end, so that the receiving end synchronizes the message with the sending end by detecting the first signal and synchronizing the sending end to perform communication.
  • the sending end further includes:
  • a setting unit configured to preset a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the sending end further includes: And a distribution unit, configured to distribute the time-frequency resources occupied by the first signal in a time-frequency resource occupied by the second signal.
  • a fourth aspect a receiving end, where the receiving end includes:
  • a receiving unit configured to receive a signal sent by the sending end, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is used to carry Information of the parameters required for communication;
  • a detecting unit configured to detect that the first signal is synchronized with the sending end
  • a demodulation unit configured to demodulate the message and communicate with the transmitting end.
  • the receiving end further includes:
  • an obtaining unit configured to acquire the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the acquiring unit is further configured to:
  • the acquiring unit is further configured to:
  • the first embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is preset At least one sequence in the sequence set, the second signal is information Message, and the receiver is configured according to a preset first signal according to a preset relationship between at least one sequence of the first signal and a message size in the signal.
  • the correspondence between the at least one sequence and the message size in the signal obtains the size of the message, because the receiving end does not need to blindly check each possible message size, thereby reducing the amount of calculation and power consumption, and reducing cost and work. Consumption.
  • a second embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and the first signal is occupied
  • the time-frequency resources are evenly distributed in the time-frequency resources occupied by the second signal, so that the transmitting end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.
  • a third embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is a message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance
  • the message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.
  • FIG. 1 is a schematic structural diagram of a D2D Discovery Signal provided by the prior art
  • FIG. 2 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a D2D Discovery Signal according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of another D2D Discovery Signal according to an embodiment of the present invention
  • FIG. 4 is a received signal according to an embodiment of the present invention.
  • FIG. 5 is a structural diagram of a device at a transmitting end according to an embodiment of the present invention.
  • FIG. 6 is a structural diagram of a device at a receiving end according to an embodiment of the present invention.
  • FIG. 7 is a structural diagram of a device at a transmitting end according to an embodiment of the present invention.
  • the receiving end first detects the Signal Sequence (black part in Figure 1) and the transmitting end synchronizes, and then detects the reference signal ( Reference Signal, RS) in the Message (white part in Figure 1) (the gray part in Figure 1) to obtain the Message.
  • the channel estimate is then blindly checked for all possible message sizes using the channel estimate. If one of the message sizes is blinded by a cyclic redundancy check (CRC) check, If the blind check of one of the message sizes fails the CRC check, the other message size is blindly checked. If all the blinds of the message size fail the CRC check, then The blind test failed.
  • CRC cyclic redundancy check
  • the present invention provides a first embodiment, a second embodiment, and a third embodiment.
  • the present invention aims to solve the problem of large computational complexity and large power consumption when the receiving end acquires the signal of the transmitting end, and reduces the overhead problem caused by the RS required by the transmitting end to send the message.
  • FIG. 2 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step 201 The transmitting end generates a signal, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is used to carry parameters required for communication.
  • Step 202 The sending end sends the signal to the receiving end, so that the receiving end synchronizes the first signal with the sending end, and then demodulates the message and the sending end to perform communication. Letter.
  • the method further includes: presetting a correspondence between the at least one sequence of the first signal and the size of the message in the signal.
  • the transmitting end presets the first signal. Corresponding relationship between at least one sequence and a message size in the signal.
  • the receiving end After receiving the signal sent by the sending end, the receiving end acquires the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols.
  • the receiver detects the reference signal in the Message (white part of Figure 1) ( Reference Signal,
  • a first embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between the at least one sequence in the first signal and the message size in the signal, so that the receiving end is according to the at least one of the preset first signals.
  • the correspondence between the sequence and the size of the message in the signal obtains the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the method further includes:
  • time-frequency resources occupied by the first signal are uniformly distributed in a time-frequency resource occupied by the second signal.
  • FIG. 3 is a schematic structural diagram of a D2D Discovery Signal according to an embodiment of the present invention.
  • FIG. 3b is a schematic structural diagram of another D2D Discovery Signal according to an embodiment of the present invention.
  • the Signal Sequence (black marker in Figure 3) is evenly distributed in the Message (white marker in Figure 3).
  • the number of elements (Resource Element, RE) differs by no more than 1
  • the number of Signal Sequence REs of each column differs by no more than 1, that is, the Signal Sequence RE is evenly distributed in the Message RE.
  • the receiving end After the receiving end receives the signal sent by the transmitting end, the receiving end first detects the Signal Sequence (the black part in FIG. 3) and the transmitting end synchronizes, and then detects the reference signal around the Message (the white part in FIG. 3) (Reference Signal, RS).
  • the black part in Figure 1 obtains the channel estimate of the Message, and then uses the channel estimate to blindly check all possible message sizes, if one of the message sizes is blinded by the cyclic redundancy code If the cyclic redundancy check (CRC) check is successful, the blind check is considered successful. If one of the message size blind checks fails the CRC check, the other message size is blindly checked if all the message sizes are used. If the blind test did not pass the CRC check, the blind test failed. Therefore, in Embodiment 2, it is not necessary to send a corresponding RS signal for the Message, thereby reducing system overhead (Overhead).
  • CRC cyclic redundancy check
  • a second embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is a preset sequence set. At least one sequence, the second signal is information Message, and the time-frequency resources occupied by the first signal are evenly distributed in the time-frequency resources occupied by the second signal, so that the transmitting end does not need to be The Message sends the corresponding RS signal, which reduces the overhead of the system.
  • the transmitting end presets a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the black signal in FIG. 3a is according to the corresponding message size in Table 1. 20
  • the message size of the white signal in FIG. 3a can be obtained as 20
  • the black signal in FIG. 3b is 30 according to the corresponding message size in Table 1
  • the message size of the white signal in FIG. 3b can be obtained as 30.
  • the receiving end After receiving the signal sent by the sending end, the receiving end acquires the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols.
  • the receiving end obtains the channel estimation value of the Message according to the first signal, and according to the channel estimation value of the Message and the Message.
  • the size detects the second signal to obtain a second signal.
  • a third embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is an information message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance
  • the message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.
  • FIG. 4 is a flowchart of a method for receiving a signal according to an embodiment of the present invention. As shown in FIG. 4, the method includes:
  • Step 401 The receiving end receives a signal sent by the sending end, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is used to carry Information of the parameters required for communication;
  • Step 402 The receiving end detects that the first signal is synchronized with the sending end.
  • the method further includes:
  • the receiving end acquires the message size according to the correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the transmitting end presets a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the receiving end After receiving the signal sent by the sending end, the receiving end acquires the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols.
  • the receiving end detects a reference signal ( Reference Signal, RS) in the Message (white portion in FIG. 1) (the gray portion in FIG. 1) to obtain a channel estimation value of the Message, and then uses the channel estimation value and the message size to the second.
  • the signal is detected to obtain a second signal.
  • RS Reference Signal
  • a first embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between the at least one sequence in the first signal and the message size in the signal, so that the receiving end is according to the at least one of the preset first signals.
  • the correspondence between the sequence and the size of the message in the signal obtains the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the method further includes:
  • FIG. 3 is a schematic structural diagram of a D2D Discovery Signal according to an embodiment of the present invention.
  • FIG. 3b is a schematic structural diagram of another D2D Discovery Signal according to an embodiment of the present invention.
  • the Signal Sequence (black mark in Figure 3) is evenly distributed in the Message (white mark in Figure 3).
  • the number of units (Resource Element, RE) differs by no more than 1
  • the number of Signal Sequence REs of each column differs by no more than 1, that is, the Signal Sequence RE is evenly distributed.
  • Message RE After the receiving end receives the signal sent by the transmitting end, the receiving end first detects the Signal Sequence (the black part in FIG. 3) and the transmitting end synchronizes, and then detects the reference signal around the Message (the white part in FIG. 3) (Reference Signal, RS).
  • the black part in Figure 1 obtains the channel estimate of the Message, and then uses the channel estimate to blindly check all possible message sizes, if one of the message sizes is blinded by the cyclic redundancy code
  • the cyclic redundancy check (CRC) check is considered to be successful. If one of the message size blind checks fails the CRC check, the other message size is blindly checked if all the message sizes are If the blind test did not pass the CRC check, the blind test failed. Therefore, in the second embodiment, it is not necessary to send a corresponding RS signal for the Message, thereby reducing the overhead of the system.
  • a second embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set.
  • the second signal is a message, and the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding message for the message.
  • RS signal which reduces system overhead.
  • Step 403 The receiving end demodulates the message and the sending end performs communication.
  • the method further includes:
  • the transmitting end presets a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the black signal in FIG. 3a is according to the corresponding message size in Table 1. 20
  • the message size of the white signal in FIG. 3a can be obtained as 20
  • the black signal in FIG. 3b is 30 according to the corresponding message size in Table 1
  • the message size of the white signal in FIG. 3b can be obtained as 30.
  • the receiving end After receiving the signal sent by the sending end, the receiving end acquires the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols.
  • the connection The receiving end obtains the channel estimation value of the message according to the first signal, and detects the second signal according to the channel estimation value and the message size of the message, and acquires the second signal.
  • a third embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is a message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance
  • the message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.
  • FIG. 5 is a structural diagram of a device at a transmitting end according to an embodiment of the present invention.
  • the sending end includes:
  • the generating unit 501 is configured to generate a signal, where the signal includes a first signal and a second signal, where the first signal is at least one sequence of a preset sequence set, and the second signal is required for carrying communications Parameter information Message;
  • the sending unit 502 is configured to send the signal to the receiving end, so that the receiving end synchronizes the message with the sending end by detecting that the first signal is synchronized with the sending end.
  • the sending end 501 further includes:
  • the setting unit 503 is configured to preset a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the transmitting end presets a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the receiving end After receiving the signal sent by the sending end, the receiving end acquires the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols.
  • the receiving end detects the reference signal ( Reference Signal, RS ) in the Message (white part in Figure 1) (the gray part in Figure 1) to obtain the channel estimation value of the Message, and then uses the channel estimation value and the
  • the message size detects the second signal and acquires the second signal.
  • An embodiment of the present invention provides a device for transmitting a signal, where the device sends a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between the at least one sequence in the first signal and the message size in the signal, so that the receiving end is according to the at least one of the preset first signals.
  • the correspondence between the sequence and the size of the message in the signal obtains the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the sending end further includes:
  • the distribution unit 504 is configured to distribute the time-frequency resources occupied by the first signal in a time-frequency resource occupied by the second signal.
  • FIG. 3 is a schematic structural diagram of a D2D Discovery Signal according to an embodiment of the present invention.
  • FIG. 3b is a schematic structural diagram of another D2D Discovery Signal according to an embodiment of the present invention.
  • the Signal Sequence (black marker in Figure 3) is evenly distributed in the Message (white marker in Figure 3).
  • the number of elements (Resource Element, RE) differs by no more than 1
  • the number of Signal Sequence REs of each column differs by no more than 1, that is, the Signal Sequence RE is evenly distributed in the Message RE.
  • the receiving end After the receiving end receives the signal sent by the transmitting end, the receiving end first detects the Signal Sequence (the black part in FIG. 3) and the transmitting end synchronizes, and then detects the reference signal around the Message (the white part in FIG. 3) (Reference Signal, RS).
  • the black part in Figure 1 obtains the channel estimate of the Message, and then uses the channel estimate to blindly check all possible message sizes, if one of the message sizes is blinded by the cyclic redundancy code
  • the cyclic redundancy check (CRC) check is considered to be successful. If one of the message size blind checks fails the CRC check, the other message size is blindly checked if all the message sizes are If the blind test did not pass the CRC check, the blind test failed. Therefore, in Embodiment 2, it is not necessary to send a corresponding RS signal for the Message, thereby reducing system overhead (Overhead).
  • Embodiment 2 of the present invention provides a device for transmitting a signal, where the device sends a message to a receiving end.
  • the signal includes a first signal and a second signal, the first signal is at least one sequence of a preset sequence set, the second signal is information Message, and the first signal is occupied by
  • the time-frequency resources are evenly distributed in the time-frequency resources occupied by the second signal, so that the transmitting end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.
  • the transmitting end presets a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the black signal in FIG. 3a is according to the corresponding message size in Table 1. 20
  • the message size of the white signal in FIG. 3a can be obtained as 20
  • the black signal in FIG. 3b is 30 according to the corresponding message size in Table 1
  • the message size of the white signal in FIG. 3b can be obtained as 30.
  • the receiving end After receiving the signal sent by the sending end, the receiving end acquires the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols.
  • the receiving end obtains the channel estimation value of the Message according to the first signal, and according to the channel estimation value of the Message and the Message.
  • the size detects the second signal to obtain a second signal.
  • Embodiment 3 of the present invention provides a device for transmitting a signal, where the device sends a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is an information message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance
  • the message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.
  • FIG. 6 is a structural diagram of a device at a receiving end according to an embodiment of the present invention. As shown in FIG. 6, the receiving end includes:
  • the receiving unit 601 is configured to receive a signal sent by the sending end, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is Number is the information Message used to carry the parameters required for communication;
  • the detecting unit 602 is configured to detect that the first signal is synchronized with the sending end;
  • the receiving end further includes:
  • the obtaining unit 603 is configured to obtain the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the transmitting end presets a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the receiving end After receiving the signal sent by the sending end, the receiving end acquires the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols.
  • the receiving end detects a reference signal ( Reference Signal, RS) in the Message (white portion in FIG. 1) (the gray portion in FIG. 1) to obtain a channel estimation value of the Message, and then uses the channel estimation value and the message size to the second.
  • the signal is detected to obtain a second signal.
  • RS Reference Signal
  • An embodiment of the present invention provides a device for transmitting a signal, where the device sends a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between the at least one sequence in the first signal and the message size in the signal, so that the receiving end is according to the at least one of the preset first signals.
  • the correspondence between the sequence and the size of the message in the signal obtains the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the obtaining unit 603 is further configured to:
  • FIG. 3 is a schematic structural diagram of a D2D Discovery Signal according to an embodiment of the present invention.
  • FIG. 3b is a schematic structural diagram of another D2D Discovery Signal according to an embodiment of the present invention.
  • the Signal Sequence (black mark in Figure 3) is evenly distributed in the Message (white mark in Figure 3).
  • the number of units ( Resource Element , RE ) differs by no more than 1
  • each The number of Signal Sequence REs of the column differs by no more than 1, that is, the Signal Sequence RE is evenly distributed in the Message RE.
  • the receiving end After the receiving end receives the signal sent by the transmitting end, the receiving end first detects the Signal Sequence (the black part in FIG. 3) and the transmitting end synchronizes, and then detects the reference signal around the Message (the white part in FIG. 3) (Reference Signal, RS).
  • the black part in Figure 1 obtains the channel estimate of the Message, and then uses the channel estimate to blindly check all possible message sizes, if one of the message sizes is blinded by the cyclic redundancy code
  • the cyclic redundancy check (CRC) check is considered to be successful. If one of the message size blind checks fails the CRC check, the other message size is blindly checked if all the message sizes are If the blind test did not pass the CRC check, the blind test failed. Therefore, in the second embodiment, it is not necessary to send a corresponding RS signal for the Message, thereby reducing the overhead of the system.
  • Embodiment 2 of the present invention provides a device for transmitting a signal, where the device sends a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set.
  • the second signal is a message, and the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding message for the message.
  • RS signal which reduces system overhead.
  • the demodulation unit 603 is configured to demodulate the message and communicate with the transmitting end.
  • the obtaining unit 604 is further configured to:
  • the transmitting end presets a correspondence between the at least one sequence in the first signal and the message size in the signal.
  • the black signal in FIG. 3a is according to the corresponding message size in Table 1. 20
  • the message size of the white signal in FIG. 3a can be obtained as 20
  • the black signal in FIG. 3b is 30 according to the corresponding message size in Table 1
  • the message size of the white signal in FIG. 3b can be obtained as 30.
  • the receiving end After receiving the signal sent by the sending end, the receiving end acquires the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.
  • the receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols. Because the second signal in FIG. 3 has a first signal that can be used as the reference signal RS, the receiving end obtains the channel estimation value of the Message according to the first signal, and according to the channel estimation value of the Message and the Message. The size detects the second signal to obtain a second signal.
  • Embodiment 3 of the present invention provides a device for transmitting a signal, where the device sends a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is a message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance
  • the message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.
  • FIG. 7 is a structural diagram of a device at a transmitting end according to an embodiment of the present invention.
  • FIG. 7 is a transmitting end 700 according to an embodiment of the present invention.
  • the specific implementation of the present invention does not limit the specific implementation of the sending end.
  • the sending end 700 includes:
  • the processor 701, the communication interface 702, and the memory 703 complete communication with each other via the bus 704.
  • the processor 701 is configured to execute a program.
  • the program can include program code, the program code including computer operating instructions.
  • the processor 701 may be a central processing unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.
  • the memory 703 is configured to store a program.
  • the memory 703 may be a volatile memory such as a random-access memory (RAM) or a non-volatile memory such as an read-only memory (ead-only memory).
  • ROM read-only memory
  • flash memory hard disk drive ( HDD ) or solid state Solid-state drive (SSD).
  • SSD solid state Solid-state drive
  • the transmitting end generates a signal, where the signal includes a first signal and a second signal, the first signal is at least one sequence in a preset sequence set, and the second signal is information used to carry parameters required for communication. ;
  • the transmitting end sends the signal to the receiving end, so that the receiving end synchronizes the message with the transmitting end by detecting the first signal and the transmitting end to synchronize.
  • the method further includes:
  • Corresponding relationship between the at least one sequence in the first signal and the message size in the signal is preset.
  • the method further includes:
  • time-frequency resources occupied by the first signal are uniformly distributed in a time-frequency resource occupied by the second signal.
  • a first embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between at least one sequence of the first signal and a message size in the signal, so that the receiving end is configured according to the at least one sequence in the preset first signal.
  • the correspondence between the size of the message in the signal acquires the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • a second embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set.
  • the second signal is a message, and the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding message for the message.
  • RS signal which reduces system overhead.
  • a third embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is a message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is based on the pre-pre First, the correspondence between the at least one sequence of the first signal and the size of the message in the signal is used to obtain the size of the message, because the receiving end does not need to blindly check each possible message size, thereby reducing the amount of computation and work. Consumption, reducing cost and power consumption. And the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.
  • FIG. 8 is a structural diagram of a device at a receiving end according to an embodiment of the present invention.
  • FIG. 8 is a receiving end 800 according to an embodiment of the present invention.
  • the specific embodiment of the present invention does not limit the specific implementation of the receiving end.
  • the receiving end 800 includes:
  • the processor 801, the communication interface 802, and the memory 803 complete communication with each other via the bus 804.
  • the processor 801 is configured to execute a program.
  • the program can include program code, the program code including computer operating instructions.
  • the processor 801 may be a central processing unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.
  • the memory 803 is used to store a program.
  • the memory 803 may be a volatile memory such as a random-access memory (RAM) or a non-volatile memory such as an read-only memory (ead-only memory). ROM), flash memory, hard disk drive (HDD) or solid-state drive (SSD).
  • the processor 801 performs the following methods based on the program instructions stored in the memory 803:
  • a signal sent by the transmitting end where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is required for carrying communication Parameter information Message;
  • the receiving end detects that the first signal is synchronized with the sending end
  • the receiving end demodulates the message and communicates with the transmitting end.
  • the method further includes: The receiving end is configured according to the at least one sequence and the signal in the first signal set in advance
  • the corresponding size of the message size, and the size of the message is obtained.
  • the method further includes:
  • the method further includes:
  • a first embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between at least one sequence of the first signal and a message size in the signal, so that the receiving end is configured according to the at least one sequence in the preset first signal.
  • the correspondence between the size of the message in the signal acquires the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • a second embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding message for the message.
  • RS signal which reduces system overhead.
  • a third embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is an information message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance
  • the message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.
  • the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.

Abstract

L'invention concerne un procédé d'émission et de réception de signaux. Le procédé comporte les étapes consistant à: envoyer des signaux à une extrémité réceptrice, les signaux comportant un premier signal et un deuxième signal, le premier signal étant au moins une séquence d'un ensemble prédéfini de séquences et le deuxième signal étant un message; en prédéfinissant une relation de mappage entre la ou les séquences du premier signal et une taille de messages dans les signaux, permettre à l'extrémité réceptrice d'obtenir la taille de messages sur la base de la relation prédéfinie de mappage entre la ou les séquences du premier signal et la taille de messages dans les signaux. Comme l'extrémité réceptrice n'a pas besoin d'effectuer un test en aveugle sur chaque taille possible de messages, une quantité de calcul et de consommation énergétique est réduite, et le coût de la consommation énergétique est réduit; de plus, des ressources temps-fréquence occupées par le premier signal sont uniformément réparties dans des ressources temps-fréquence occupées par le deuxième signal de telle façon qu'une extrémité émettrice n'ait pas à envoyer un signal RS correspondant pour le message, réduisant une surcharge du système.
PCT/CN2013/084610 2013-09-29 2013-09-29 Procédé et dispositif d'envoi et de réception de données WO2015042915A1 (fr)

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CN201380011857.7A CN104685814B (zh) 2013-09-29 2013-09-29 一种发送和接收信号的方法及设备

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102547871A (zh) * 2012-02-07 2012-07-04 华为技术有限公司 一种d2d通信中的资源协商方法及设备
CN103327568A (zh) * 2012-03-21 2013-09-25 中国移动通信集团公司 资源分配消息发送方法、设备发现方法及相关设备

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10053352A1 (de) * 2000-10-27 2002-05-08 Alcatel Sa Verfahren zum Zuweisen von Ressourcen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102547871A (zh) * 2012-02-07 2012-07-04 华为技术有限公司 一种d2d通信中的资源协商方法及设备
CN103327568A (zh) * 2012-03-21 2013-09-25 中国移动通信集团公司 资源分配消息发送方法、设备发现方法及相关设备

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