WO2015109461A1 - 设备到设备通信方法和用户设备 - Google Patents

设备到设备通信方法和用户设备 Download PDF

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Publication number
WO2015109461A1
WO2015109461A1 PCT/CN2014/071129 CN2014071129W WO2015109461A1 WO 2015109461 A1 WO2015109461 A1 WO 2015109461A1 CN 2014071129 W CN2014071129 W CN 2014071129W WO 2015109461 A1 WO2015109461 A1 WO 2015109461A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
value
parameter
scrambling
scrambling code
Prior art date
Application number
PCT/CN2014/071129
Other languages
English (en)
French (fr)
Inventor
王键
Original Assignee
华为终端有限公司
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 华为终端有限公司 filed Critical 华为终端有限公司
Priority to KR1020167020034A priority Critical patent/KR101862737B1/ko
Priority to EP14879540.4A priority patent/EP3079294B1/en
Priority to US15/112,849 priority patent/US10129917B2/en
Priority to CN201910376643.9A priority patent/CN110113134B/zh
Priority to CN201480072014.2A priority patent/CN105900368B/zh
Priority to PCT/CN2014/071129 priority patent/WO2015109461A1/zh
Priority to JP2016547881A priority patent/JP6316444B2/ja
Publication of WO2015109461A1 publication Critical patent/WO2015109461A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/14Direct-mode setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056Systems characterized by the type of code used
    • H04L1/0061Error detection codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041Arrangements at the transmitter end
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056Systems characterized by the type of code used
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00Arrangements for synchronising receiver with transmitter
    • H04L7/0008Synchronisation information channels, e.g. clock distribution lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/005Discovery of network devices, e.g. terminals

Definitions

  • Embodiments of the present invention relate to the field of communications, and more particularly, to device-to-device communication methods and user equipment. Background technique
  • the device-to-device proximity service (English full name: Device to Device Proximity Service, English abbreviation: D2D ProSe) has become a long-term evolution (English name: Long Term Evolution, User Equipment, English abbreviation: UE) English abbreviation: LTE) The hot topic of the system.
  • the device-to-device (English name: Device to Device, English abbreviation: D2D) communication function has been applied to some existing cluster systems and some walki-talki devices. Due to the great success of the commercialization of LTE systems, providing D2D ProSe based on the physical layer of the LTE system can enrich the service range of the LTE system and make D2D communication available to more users.
  • the scrambling codes in the LTE system are mainly divided into two categories, one is the data channel scrambling code, which is used to scramble the data channel, can realize interference randomization and encrypt the user; the other is cyclic redundancy check.
  • Embodiments of the present invention provide a D2D communication method and user equipment, which can implement scrambling and descrambling of transmission information in a D2D communication process.
  • an embodiment of the present invention provides a D2D communication method, including: determining, by a first user equipment, a value of a scrambling code parameter, where the scrambling code parameter includes at least one of the following parameters: a public scrambling code parameter and a specific scrambling code
  • the first user equipment scrambles the to-be-sent bit according to the value of the scrambling parameter; the first user equipment sends the scrambled to-be-sent bit.
  • the scrambling parameter includes the common scrambling parameter; the determining, by the first user equipment, the value of the scrambling parameter, the:
  • a D2D synchronization signal determining a value of the common scrambling parameter; or determining, by the first user equipment, a value of the common scrambling parameter according to the D2D primary synchronization channel PD2DSCH; or the first user equipment belongs to the fifth user equipment
  • the cluster identity of the D2D cluster is determined as the value of the common scrambling parameter.
  • the first user equipment determines, according to the D2D synchronization signal, a value of the common scrambling parameter, including: the first user equipment The number of the D2D sync signal is determined as the value of the common scrambling parameter.
  • the D2D synchronization signal includes a D2D primary synchronization signal PD2DSS and a D2D secondary synchronization signal SD2DSS; the first user equipment is configured according to the D2D synchronization signal.
  • Determining the value of the common scrambling parameter includes: determining, by the first user equipment, the value of the common scrambling parameter according to the PD2DSS and the SD2DSS.
  • the value of the common scrambling parameter N; c is determined by:
  • the scrambling parameter includes the specific scrambling parameter; the first user equipment determines a value of the scrambling parameter, including Determining, by the first user equipment, the specific scrambling parameter according to the D2D identifier of the first user equipment, the D2D group identifier of the first 0 user equipment, and the service type identifier of the first user equipment. value.
  • the first user equipment is configured according to the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the first Determining, by the at least one of the service type identifiers of the user equipment, the value of the specific interference 5 code parameter, the method includes: determining, by the first user equipment, the D2D identifier of the first user equipment as a value of the specific scrambling code parameter; Or the first user equipment determines the D2D group identifier of the first user equipment as the value of the specific scrambling parameter; or the first user equipment determines the service type identifier of the first user equipment as the specific scrambling parameter. value.
  • the first user equipment is configured according to the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the Determining the specific interference by at least one of the service type identifiers of the first user equipment
  • the value of the code parameter includes: at least one of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment, and the hash.
  • a function determining a value of the specific scrambling parameter; or the first user equipment according to at least one of a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, and a service type identifier of the first user equipment
  • An identification and truncation function that determines the value of the particular scrambling parameter.
  • the determining, by the first user equipment, the value of the scrambling parameter includes: receiving, by the first user equipment, a cluster head of the D2D cluster to which the base station or the first user equipment belongs
  • the indication information is used to indicate the value of the scrambling code parameter; the first user equipment determines the value of the scrambling code parameter according to the indication information.
  • the first user equipment scrambles a to-be-transmitted bit, including: The user equipment determines an initial value of the scrambling code according to the value of the scrambling code parameter. The first user equipment generates a scrambling code sequence according to the initial value of the scrambling code, and scrambles the to-be-transmitted bit by using the scrambling code sequence.
  • the first user equipment determines the initial value of the scrambling code according to the value of the scrambling code parameter, including: the first user equipment The value of the common scrambling parameter is determined as the initial value of the scrambling code; or the first user equipment determines the value of the specific scrambling parameter as the initial value of the scrambling code.
  • the first user equipment determines, according to the value of the scrambling code parameter, an initial value of the scrambling code, including: the first user equipment The initial value of the scrambling code is determined according to the value of the scrambling code parameter and the current slot number.
  • the scrambling code initial value c init is determined by:
  • s is the current time slot number
  • ⁇ 2 ⁇ is the value of the common scrambling code parameter or the value of the specific scrambling code number.
  • the 4 interesting initial value c init is determined by: Init + N s " 2 e D c , or
  • s is the current slot number
  • vm m is the value of the common scrambling parameter
  • VJ ⁇ is the value of the specific scrambling parameter
  • the first user equipment is configured according to the The value of the scrambling parameter, scrambling the to-be-transmitted bit, includes: dividing, by the first user equipment, the value of the scrambling parameter into at least two scrambling segments; the first user equipment scrambles the at least two scrambling segments The bit to be sent.
  • the first user equipment by using the at least two scrambling code segments, to scramble the to-be-transmitted bit, includes: the first The user equipment generates a cyclic redundancy code check CRC bit of the to-be-transmitted bit, and uses the to-be-transmitted bit and the CRC bit of the to-be-transmitted bit as a to-be-scrambled bit; the first user equipment divides the to-be-scrambled bit into at least Two first to be scrambled bit segments; the first user equipment generates a CRC bit of each of the at least two to-be-scrambled bit segments; the first user equipment adds the at least two scrambling code segments Disturbing on the CRC bits of the at least two bits to be scrambled.
  • the first user equipment by using the at least two scrambling code segments, to scramble the to-be-transmitted bit, includes: the first The user equipment divides the to-be-transmitted bit into at least two to-be-transmitted bit segments; the first user sets the first user equipment to scramble the at least two scrambling code segments on the CRC bits of the at least two to-be-transmitted bit-segments.
  • the embodiment of the present invention provides another D2D communication method, including: receiving, by a second user equipment, a bit sent by a first user equipment; and determining, by the second user equipment, a value of a scrambling parameter of the first user equipment,
  • the scrambling parameter includes at least one of the following parameters: a common scrambling parameter and a specific scrambling parameter; the second user equipment descrambles the received bit according to the value of the scrambling parameter.
  • the value of the common scrambling parameter is determined by the first user equipment according to the D2D synchronization signal; or the value of the common scrambling parameter is determined by the first user equipment Determined by the D2D primary synchronization channel PD2DSCH; or the value of the common scrambling parameter The cluster identifier of the D2D cluster to which the first user equipment belongs.
  • the value of the specific scrambling parameter is a D2D identifier of the first user equipment
  • the first user At least one of the D2D group identifier of the device and the service type identifier of the first user equipment is obtained after a predetermined function operation.
  • the value of the specific scrambling parameter is a D2D identifier of the first user equipment; or the value of the specific scrambling parameter is The D2D group identifier of the first user equipment; or the value of the specific scrambling parameter is a service type identifier of the first user equipment.
  • the preset function is a hash function or a truncation function.
  • the second user equipment determines a value of the scrambling parameter of the first user equipment, including: the second user The device determines the value of the common scrambling parameter according to the D2D synchronization signal; or the second user equipment determines the value of the common scrambling parameter according to the D2D primary synchronization channel PD2DSCH; or the second user equipment belongs to the second user equipment
  • the cluster identity of the D2D cluster is determined as the value of the common scrambling parameter.
  • the second user equipment determines, according to the D2D synchronization signal, a value of the common scrambling parameter, including: the second user equipment The number of the D2D sync signal is determined as the value of the common scrambling parameter.
  • the D2D synchronization signal includes a D2D primary synchronization signal PD2DSS and a D2D secondary synchronization signal SD2DSS; the second user equipment is configured according to the D2D synchronization signal, Determining the value of the common scrambling parameter includes: determining, by the second user equipment, the value of the common scrambling parameter according to the PD2DSS and the SD2DSS.
  • the value N c of the common scrambling parameter is determined by:
  • the second user equipment determines the The value of the scrambling parameter of the user equipment, including: the second user equipment receiving the base station or the The indication information sent by the cluster head of the D2D cluster to which the second user equipment belongs, the indication information is used to indicate the value of the scrambling parameter of the first user equipment; and the second user equipment determines the scrambling parameter according to the indication information. value.
  • the second user equipment descrambles the received bit according to the value of the scrambling code parameter, including: the second user equipment determines an initial value of the scrambling code according to the value of the scrambling code parameter; The device generates a scrambling code sequence according to the initial value of the scrambling code, and uses the scrambling code sequence to descramble the received bit.
  • the second user equipment determines the initial value of the scrambling code according to the value of the scrambling code parameter, including: the second user equipment Determining the value of the common scrambling parameter as the initial value of the scrambling code; or determining, by the second user equipment, the value of the specific scrambling parameter as the initial value of the scrambling code.
  • the second user equipment determines, according to the value of the scrambling code parameter, an initial value of the scrambling code, including: the second user equipment The initial value of the scrambling code is determined according to the value of the scrambling code parameter and the current slot number.
  • the four value c is determined by: init + l) x (2x iV + l) x 2 9 + iV DID
  • Cinit 2 9 + N DID where " s is the current slot number, and ⁇ 2 ⁇ is the value of the common scrambling parameter or the value of the specific scrambling code.
  • the four value c t is determined by: init + , or
  • the value of the common scrambling parameter is the value of the specific scrambling parameter.
  • the bit received by the second user equipment includes at least two bit segments, each of the at least two bit segments includes a data bit segment and a CRC bit; the second user equipment utilizes The scrambling sequence descrambles the received bit, the method includes: the second user equipment splits the value of the scrambling parameter into at least two scrambling segments; and the second user equipment uses the at least two scrambling segments to descramble the The CRC bits of at least two bit segments are obtained to obtain at least two bit segments to be checked.
  • the method further includes: the second user equipment, each of the at least two to-be-checked bit fragments Performing a CRC check on the bit segment to obtain a data bit segment of each bit segment to be verified; the second user equipment concatenates the data bit segments of the at least two bit segments to be checked to obtain data Bit.
  • the data bit includes a raw data bit and a CRC bit.
  • the method further includes: the second user equipment is the data bit A CRC check is performed to obtain the original data bits.
  • a third aspect provides a user equipment, including: a determining module, configured to determine a value of a scrambling parameter, where the scrambling parameter includes at least one of the following parameters: a common scrambling parameter and a specific scrambling parameter; scrambling And a module, configured to send, according to the value of the scrambling parameter determined by the determining module, a to-be-transmitted bit; and a sending module, configured to send the to-be-transmitted bit scrambled by the scrambling module.
  • the scrambling code parameter includes the common scrambling code parameter;
  • the determining module includes: a first determining unit, where the first determining unit is configured to use, according to the D2D synchronization signal, Determining a value of the common scrambling parameter; or the first determining unit is configured to determine a value of the common scrambling parameter according to the D2D primary synchronization channel PD2DSCH; or the first determining unit is configured to use the D2D cluster to which the user equipment belongs The cluster identity is determined as the value of the common scrambling parameter.
  • the first determining unit is specifically configured to determine a number of the D2D synchronization signal as a value of the common scrambling parameter.
  • the D2D synchronization signal includes a D2D primary synchronization signal PD2DSS and a D2D secondary synchronization signal SD2DSS;
  • the PD2DSS and the SD2DSS determine the value of the common scrambling parameter.
  • the value of the common scrambling parameter ⁇ is determined by:
  • the scrambling parameter includes the specific scrambling parameter;
  • the determining module includes: a second determining unit, configured to: Determining, by the D2D identifier of the user equipment, the D2D group identifier of the user equipment, and the service type identifier of the user equipment, determining a value of the specific scrambling parameter.
  • the second determining unit is specifically configured to: determine a D2D identifier of the user equipment as a value of the specific scrambling parameter; or Determining the D2D group identifier of the user equipment as the value of the specific scrambling parameter; or determining the service type identifier of the user equipment as the value of the specific scrambling parameter.
  • the second determining unit is specifically configured to: according to the D2D identifier of the user equipment, the D2D group identifier of the user equipment, and the user At least one identifier of the service type identifier of the device and a hash function, determining a value of the specific scrambling parameter; or according to the D2D identifier of the user equipment, the D2D group identifier of the user equipment, and the service type identifier of the user equipment At least one of an identification and a truncation function that determines the value of the particular scrambling parameter.
  • the determining module includes: a receiving unit, configured to receive indication information sent by a base station or a cluster head of a D2D cluster to which the user equipment belongs, where the indication information is used to indicate the a value of the scrambling parameter; a third determining unit, configured to determine a value of the scrambling parameter according to the indication information received by the receiving unit.
  • the scrambling module includes: a determining unit, configured to determine an initial value of the scrambling code according to the value of the scrambling parameter And a first scrambling unit, configured to generate a scrambling code sequence according to the initial value of the scrambling code determined by the determining unit, and use the scrambling code sequence to scramble the to-be-transmitted bit.
  • the determining unit is specifically configured to: determine a value of the common scrambling parameter as the initial value of the scrambling code; or The value of the scrambling parameter is determined as the initial value of the scrambling code.
  • the determining unit is specifically configured to: determine the initial value of the scrambling code according to the value of the scrambling parameter and the current slot number .
  • the method is specifically configured to determine the initial value of the scrambling code C m3 ⁇ 4 according to the following formula:
  • s is the current time slot number
  • ⁇ 2 ⁇ is the value of the common scrambling parameter or the value of the specific scrambling parameter.
  • s is the current slot number
  • vm m is the value of the common scrambling parameter
  • VJ ⁇ is the value of the specific scrambling parameter
  • the scrambling module includes: a segment unit, configured to divide the value of the scrambling code parameter into at least two scrambling code segments; and a second scrambling unit, configured to scramble the to-be-transmitted bit by using the at least two scrambling code segments divided by the segmentation unit.
  • the second scrambling unit includes: a first generating subunit, configured to generate cyclic redundancy of the to-be-transmitted bit a code check (CRC) bit, and the CRC bit of the to-be-transmitted bit and the to-be-transmitted bit is used as a to-be-scrambled bit;
  • the first segment sub-unit is configured to generate the to-be-scrambled bit generated by the first generation sub-unit Dividing into at least two to-be-scrambled bit segments;
  • the first generating sub-unit is further configured to generate a CRC bit of each of the at least two to-be-scrambled bit segments into which the first segment sub-unit is divided;
  • the first scrambling subunit is configured to separately scramble the at least two scrambling code segments on the CRC bits of the at least two to-be-scrambled bit segments generated by the first generating sub-unit.
  • the second scrambling unit includes: a second segment subunit, configured to divide the to-be-transmitted bit into at least two a bit segment to be transmitted; a second generation subunit, configured to generate the second segment subunit And a scrambling unit, configured to scramble the at least two scrambling code segments on the CRC bits of the at least two to-be-transmitted bit segments generated by the second generating sub-unit.
  • the fourth aspect provides another user equipment, including: a receiving module, configured to receive a bit sent by the first user equipment; and a determining module, configured to determine a value of the scrambling parameter of the first user equipment, the scrambling parameter
  • the at least one of the following parameters is included: a common scrambling parameter and a specific scrambling parameter; and a descrambling module, configured to descramble the bit received by the receiving module according to the value of the scrambling parameter determined by the determining module.
  • the value of the common scrambling parameter is determined by the first user equipment according to the D2D synchronization signal; or the value of the common scrambling parameter is determined by the first user equipment
  • the D2D primary synchronization channel is determined by the PD2DSCH; or the value of the common scrambling parameter is a cluster identifier of the D2D cluster to which the first user equipment belongs.
  • the value of the specific scrambling parameter is a D2D identifier of the first user equipment
  • the first user At least one of the D2D group identifier of the device and the service type identifier of the first user equipment is obtained after a predetermined function operation.
  • the value of the specific scrambling parameter is a D2D identifier of the first user equipment; or the value of the specific scrambling parameter is The D2D group identifier of the first user equipment; or the value of the specific scrambling parameter is a service type identifier of the first user equipment.
  • the preset function is a hash function or a truncation function.
  • the determining module includes: a first determining unit, where the first determining unit is configured to use, according to the D2D synchronization signal, Determining a value of the common scrambling parameter; or the first determining unit is configured to determine a value of the common scrambling parameter according to the D2D primary synchronization channel PD2DSCH; or the first determining unit is configured to use the D2D cluster to which the user equipment belongs The cluster identity is determined as the value of the common scrambling parameter.
  • the first determining unit is specifically configured to determine a number of the D2D synchronization signal as a value of the common scrambling parameter.
  • the D2D synchronization signal includes a D2D primary synchronization signal PD2DSS and a D2D secondary synchronization signal SD2DSS;
  • the first determining unit is specifically configured to determine a value of the common scrambling parameter according to the PD2DSS and the SD2DSS.
  • the value N c of the common scrambling parameter is determined by:
  • the determining module includes: a receiving unit, And the indication information for receiving the cluster head of the D2D cluster to which the base station or the user equipment belongs, the indication information is used to indicate a value of the scrambling parameter of the first user equipment, and the second determining unit is configured to receive according to the receiving unit The indication information determines the value of the scrambling code parameter.
  • the descrambling module includes: a third determining unit, configured to determine a scrambling code according to the value of the scrambling parameter An initial value; a first descrambling unit, configured to generate a scrambling code sequence according to the initial value of the scrambling code determined by the third determining unit, and use the scrambling code sequence to descramble the received bit.
  • the third determining unit is specifically configured to: determine the value of the common scrambling parameter as the initial value of the scrambling code; or The value of the specific scrambling parameter is determined as the initial value of the scrambling code.
  • the third determining unit is specifically configured to: determine the scrambling code according to the value of the scrambling parameter and the current slot number Initial value.
  • the third determining unit is specifically configured to determine the initial value of the scrambling code according to the following formula: ⁇ i, nit
  • the current time slot number, ⁇ 2 ⁇ is the value of the common scrambling code parameter or the value of the specific scrambling code parameter.
  • the third determining unit is specifically configured to determine the scrambling code initial value c imt according to the following formula: Init + N s " 2 e D c , or
  • s is the current slot number
  • vm m is the value of the common scrambling parameter
  • VJ ⁇ is the value of the specific scrambling parameter
  • the receiving the module includes the at least two bit segments, the at least two bits Each bit segment in the segment includes a data bit segment and a CRC bit;
  • the descrambling module includes: a segmentation unit, configured to divide the value of the scrambling code parameter into at least two scrambling code segments; and a second descrambling unit, configured to: The at least two scrambling code segments divided by the segmentation unit respectively descramble the CRC bits of the at least two bit segments to obtain at least two bit segments to be checked.
  • the user equipment further includes: a CRC check module, configured to obtain the to the second descrambling unit a data bit segment of the bit segment to be checked; a cascading module, configured to concatenate the data bit segments of the at least two bit segments to be verified obtained by the CRC check module to obtain data bits.
  • the data bit obtained by the cascading module includes an original data bit and a CRC bit; the CRC check module is further used to: The data bit obtained by the cascading module is subjected to CRC check to obtain the original data bit.
  • the transmitting end determines the value of at least one of the common scrambling code parameter and the specific scrambling code parameter, and treats according to the value of the scrambling code parameter. Transmitting bits for scrambling, capable of scrambling transmission information during D2D communication; and determining, by the receiving end, values of at least one of the common scrambling parameters and the specific scrambling parameters, and according to the scrambling parameters. The value descrambles the received bits to implement descrambling of the transmitted information during D2D communication, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • FIG. 1 is a schematic flowchart of a D2D communication method according to an embodiment of the present invention.
  • FIG. 2 is another schematic flowchart of a D2D communication method according to an embodiment of the present invention.
  • FIG. 3 is still another schematic flowchart of a D2D communication method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of scrambling a to-be-transmitted bit in a D2D communication method according to an embodiment of the present invention.
  • FIG. 5 is another schematic diagram of scrambling a to-be-transmitted bit in a D2D communication method according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a D2D communication method according to another embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of a user equipment according to another embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of a user equipment according to still another embodiment of the present invention.
  • FIG. 10 is a schematic block diagram of a user equipment according to still another embodiment of the present invention. detailed description
  • the user equipment (English name: User Equipment, English abbreviation: UE) includes but is not limited to a mobile station (English full name: Mobile Station, English abbreviation: MS), mobile terminal (English full name: Mobile Terminal), mobile phone (English full name: Mobile Telephone), mobile phone (English full name: handset) and portable device (English full name: portable equipment), etc.
  • the user equipment can be wirelessly accessed Network (English name: Radio Access Network, English abbreviation: RAN) communicates with one or more core networks.
  • the user equipment can be a mobile phone (or "cellular" phone), a computer with wireless communication function, etc.
  • the user device can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the base station may be a base station in GSM or CDMA (English full name: Base Transceiver Station, English abbreviation: BTS), or may be a base station (NodeB) in WCDMA, or an evolved base station in LTE ( The English full name: evolved Node B, English abbreviation: eNB or e-NodeB), the embodiment of the present invention is not limited.
  • FIG. 1 is a schematic flowchart of a D2D communication method 100 according to an embodiment of the present invention. As shown in FIG. 1, the method 100 includes:
  • the first user equipment determines a value of the scrambling parameter, where the scrambling parameter includes at least one of the following parameters: a common scrambling parameter and a specific scrambling parameter;
  • S120 The first user equipment performs scrambling on the to-be-transmitted bit according to the value of the scrambling parameter.
  • S130 The first user equipment sends the scrambled bit to be transmitted.
  • the transmitting end determines the value of at least one of the common scrambling code parameter and the specific scrambling code parameter, and scrambles the bit to be transmitted according to the value of the scrambling parameter. It can realize the scrambling of the transmission information in the D2D communication process, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • the scrambling code parameter includes a common scrambling parameter and/or a specific scrambling parameter, and correspondingly, the value of the scrambling parameter may include a value of the common scrambling parameter and/or Or the value of a particular scrambling parameter.
  • the common scrambling parameter may be a scrambling parameter shared by multiple UEs, and may reflect a common characteristic of the multiple user equipments, for example, a scrambling parameter shared by all UEs in a D2D cluster; the specific scrambling parameter may be The UE-specific scrambling parameter can reflect the user device's unique characteristics.
  • the specific scrambling parameter is the identifier of the UE, so that the receiving end can distinguish the user equipment from other user equipment according to the specific scrambling parameter, but The embodiment of the invention is not limited thereto.
  • the first user equipment sends a discovery signal.
  • the first user equipment needs as many other user equipments as possible to discover itself. Therefore, the first The user equipment may scramble the discovery signal by using a common scrambling parameter, and the user equipment receiving the discovery signal may descramble the discovery signal by using the common scrambling parameter.
  • the scrambling code specific to the buddy group may be adopted.
  • the parameter is scrambled and the discovery signal is sent, and the user equipment that receives the discovery signal can only descramble the discovery signal through the specific scrambling parameter of the buddy group; the user equipment that is not in the buddy group does not know the specific interference of the group.
  • the code parameter is therefore not able to descramble the discovery signal sent by the first user equipment, so the user equipment that is not in the friend group cannot discover the first user equipment.
  • the determining, by the first user equipment, the value of the scrambling parameter includes: determining, by the first user equipment, a value of a common scrambling parameter and/or a value of a specific scrambling parameter, where the first user equipment may pass multiple The manner determines the value of the common scrambling parameter and/or the value of the particular scrambling parameter, but embodiments of the invention are not limited thereto.
  • the to-be-transmitted bit may be specifically one or more bits, and the to-be-transmitted bit may carry the discovery signal or the data to be transmitted, and the embodiment of the present invention is not limited thereto.
  • the first user equipment may perform data channel scrambling. Specifically, the first user equipment may generate a scrambling code sequence according to the value of the scrambling code parameter, and use the scrambling code sequence to Send bits for scrambling.
  • the first user equipment may perform CRC scrambling. Specifically, the first user equipment may set the value of the scrambling parameter or the value of the scrambling parameter. The value obtained after the processing is scrambled as a scrambling code sequence on the CRC bit of the bit to be transmitted, but the embodiment of the present invention is not limited thereto.
  • the embodiment of the present invention may be applied to an open discovery scenario and a controlled discovery scenario, where the scrambling parameter may include only the common scrambling parameter in the open discovery scenario. And scrambling the discovery signal according to the value of the common scrambling parameter, so that more neighboring UEs can descramble the discovery signal sent by the first user equipment.
  • the scrambling parameter may include only a specific scrambling parameter or include a specific scrambling parameter and a common scrambling parameter, and according to the value of the specific scrambling parameter or according to the value of the specific scrambling parameter and the The value of the common scrambling parameter scrambles the discovery signal, so that only the neighboring user equipment having the further association relationship with the first user equipment can descramble the discovery signal sent by the first user equipment.
  • a neighboring user equipment having a further association relationship with the first user equipment can learn the value of the specific scrambling parameter of the first user equipment, and the association relationship may depend on the purpose of the first user equipment to send the discovery signal, that is, the Which neighboring user devices a user device wants to make De-scrambling the discovery signal, for example, a neighboring user equipment that belongs to the same user group as the first user equipment, or a neighboring user equipment that belongs to the same service type as the first user equipment, and the like. limited.
  • the determining, by the first user equipment, the value of the scrambling parameter may include determining, by the first user equipment, a value of the common scrambling parameter, optionally, step S110 This can be achieved in the following ways:
  • the first user equipment determines the value of the common scrambling parameter according to the D2D synchronization signal.
  • the first user equipment determines a value of the common scrambling code parameter according to the D2D primary synchronization channel PD2DSCH;
  • the first user equipment determines the cluster identifier of the D2D cluster to which the first user equipment belongs as the value of the common scrambling parameter.
  • the first user equipment may detect the D2D synchronization signal, where the D2D synchronization signal may be sent by the cluster head of the D2D cluster to which the first user equipment belongs, or may be sent by the base station, and the implementation of the present invention is implemented. This example does not limit this.
  • the first user equipment detects the D2D synchronization signal, the value of the common scrambling parameter is obtained from the D2D synchronization signal.
  • the first user equipment may use the detected number of the D2D synchronization signal as The value of the common scrambling parameter may be specifically: the first user equipment determines the number of the D2D synchronization signal as the value of the common scrambling parameter.
  • the D2D synchronization signal may include a D2D primary synchronization signal.
  • a user equipment determines a value of the common scrambling parameter according to the PD2DSS and the SD2DSS.
  • the first user equipment may separately detect the PD2DSS and the SD2DSS, and determine a value of the common scrambling parameter according to the detected PD2DSS and the SD2DSS.
  • the first user equipment may determine the value of the common scrambling parameter according to the following formula:
  • the first user equipment may further determine a value of the common scrambling parameter by using another formula, The embodiment of the invention does not limit this.
  • the first user equipment may obtain the value of the common scrambling parameter on a specific time-frequency resource of the D2D synchronization channel (English name: Primary Device to Device Synchronization Channel, English abbreviation: PD2DSCH). There is no limit to this.
  • the first user equipment may use the cluster identifier of the D2D cluster to which the first user equipment belongs as the value of the common scrambling parameter, but the embodiment of the present invention is not limited thereto.
  • determining, by the first user equipment, that the value of the scrambling parameter may include determining, by the first user equipment, a value of a specific scrambling parameter
  • the first user equipment may determine its own specific scrambling parameter in a plurality of manners.
  • the first user equipment may be based on the D2D identifier of the first user equipment, and the D2D group of the first user equipment.
  • the identifier and the at least one identifier of the service type identifier of the first user equipment determine the value of the specific scrambling parameter of the first user equipment. Accordingly, step S110 can also be implemented in the following manner:
  • the first user equipment determines the specific scrambling parameter according to at least one of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment. Value.
  • the fourth method can be implemented in the following ways:
  • the first user equipment uses the D2D identifier of the first user equipment, or the D2D group identifier of the first user equipment or the service type identifier of the first user equipment as the value of the specific scrambling parameter;
  • the D2D group identifier of the first user equipment may be a D2D user group identifier of the first user equipment, but the embodiment of the present invention is not limited thereto.
  • the first user equipment performs operation on the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment according to a certain operation rule. And the value obtained by the operation is taken as the value of the specific scrambling parameter.
  • the operation rule may adopt a function representation, for example, a hash function or a truncation function, etc., wherein if the function is a truncation function, the truncation function is used to truncate the identifier, specifically, the truncation
  • the function may be truncated from the front end, truncated from the back end, or truncated from the middle portion, which is not limited by the embodiment of the present invention.
  • Hash Function Also known as a hash function.
  • the path 2 may be specifically: the first user equipment of the first user equipment
  • the D2D identifier, the D2D group identifier of the first user equipment, or the service type identifier of the first user equipment is substituted into the hash function as an output value, and the output value of the hash function is used as the value of the specific scrambling parameter; or
  • the first user equipment substitutes the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, or the service type identifier of the first user equipment as an input value into a truncation function, and outputs an output value of the truncation function.
  • the value of the specific scrambling parameter the embodiment of the present invention is not limited thereto.
  • step S110 can also be implemented in a fifth manner, and manner five includes the following two steps:
  • Step 1 The first user equipment receives indication information sent by a cluster head of a D2D cluster to which the base station or the first user equipment belongs, where the indication information is used to indicate a value of the scrambling parameter;
  • Step 2 The first user equipment determines a value of the scrambling parameter according to the indication information.
  • the indication information may be physical layer signaling or high layer signaling.
  • the indication information is discovery signal paging signaling or radio resource management (English full name: Radio Resource Control, English abbreviation: RRC) dedicated signaling. , and many more.
  • the indication information may indicate the value of the scrambling parameter explicitly or implicitly, wherein the value of the scrambling parameter may be specifically a value of a common scrambling parameter and/or a value of a specific scrambling parameter, for example, the indication information.
  • the value of the specific scrambling parameter and/or the value of the common scrambling parameter may be included; or the indication information includes information related to the value of the specific scrambling parameter and/or the common scrambling parameter, the first user equipment according to The related information determines the value of the specific scrambling parameter and/or the common scrambling parameter, but the embodiment of the present invention is not limited thereto.
  • the first user equipment may perform data channel scrambling on the to-be-transmitted bit, and accordingly, as shown in FIG. 2, S120, the first user equipment sends a bit according to the value of the scrambling parameter.
  • Scrambling including:
  • the first user equipment determines an initial value of the scrambling code according to the value of the scrambling code parameter.
  • S122. The first user equipment generates a scrambling code sequence according to the initial value of the scrambling code, and the scrambling code sequence is used to add 4 Send bits. Specifically, in S122, the first user equipment may generate a CRC bit of the to-be-transmitted bit, and use the to-be-transmitted bit and the CRC bit as actual transmit bits. Then, the first user equipment may use the scrambling code sequence.
  • the scrambling is on the actual transmitted bit, but the embodiment of the present invention is not limited thereto.
  • the first user equipment may determine the initial value of the scrambling code in multiple manners.
  • step S121 may be implemented by using the following implementation manners:
  • the first user equipment determines the value of the common scrambling code parameter as the initial value of the scrambling code
  • Embodiment 2 if the scrambling parameter includes the specific scrambling parameter, the first user equipment determines the value of the specific scrambling parameter as the initial value of the scrambling code;
  • the first user equipment determines the initial value of the 4th code according to the value of the scrambling parameter and the current time slot number.
  • the value of the scrambling parameter may be specifically a value of the common scrambling parameter and/or a value of the specific scrambling parameter.
  • the current time slot number may be the number of the time slot occupied by the first user equipment to send the scrambled to-be-transmitted bit.
  • the current time slot number may be the time slot occupied by the first user equipment.
  • the number in one radio frame may have any value from 0 to 19, but the embodiment of the present invention is not limited thereto.
  • the initial value of the scrambling code c init can determine:
  • s is the current time slot number
  • ⁇ 2 ⁇ is the value of the common scrambling parameter or the value of the specific scrambling parameter.
  • the initial value of the scrambling code may be determined by:
  • is the value of the common scrambling parameter
  • VD ⁇ 2D is the specific interference.
  • the initial value of the scrambling code may also be determined by other formulas, and the embodiment of the present invention is not limited thereto.
  • the first user equipment may further perform CRC scrambling on the to-be-transmitted bit, that is, the first user equipment uses a value generated by the scrambling code parameter to generate a CRC according to the to-be-transmitted bit.
  • the bits are scrambled.
  • the number of bits corresponding to the value of the scrambling parameter exceeds the number of bits of the CRC bit to be scrambled, that is, the number of bits corresponding to the value of the scrambling parameter is greater than 24,
  • the first user equipment may divide the value of the scrambling code parameter into at least two scrambling code segments, and use the at least two scrambling code segments to scramble the to-be-transmitted bits, where the at least two scrambling code segments are The number may be determined according to actual needs.
  • the number of the at least two scrambling code segments may depend on the number of bits corresponding to the value of the scrambling code parameter and the number of bits of the CRC bit, so that each scrambling code segment corresponds to The number of bits is less than or equal to the number of bits of the CRC bit, but the embodiment of the present invention is not limited thereto.
  • the first user equipment performs scrambling on the sending bit according to the value of the scrambling parameter, including:
  • the first user equipment divides the value of the scrambling code parameter into at least two scrambling code segments
  • the first user equipment uses the at least two scrambling code segments to scramble the to-be-transmitted bit.
  • the first user equipment may generate at least two CRC bits for the to-be-transmitted bit, and scramble the at least two scrambling code segments on the CRC bits generated according to the to-be-transmitted bit, but Embodiments of the invention are not limited thereto.
  • the first user equipment uses the at least two scrambling code segments to scramble the to-be-sent bit, including:
  • the first user equipment divides the to-be-transmitted bit into at least two to-be-transmitted bit segments;
  • the first user equipment generates a cyclic redundancy code check (CRC) bit of each of the at least two to-be-transmitted bit segments;
  • CRC cyclic redundancy code check
  • the first user equipment scrambles the at least two scrambling code segments on the CRC bits of the at least two to-be-transmitted bit segments.
  • the first user equipment may generate a CRC bit for each of the at least two to-be-transmitted bit segments, and place the generated CRC bit after the corresponding to-be-transmitted bit segment, as the actual transmission. Bit fragment.
  • the number of the bit fragments to be sent may be Or equal to the number of the scrambling code segments, and the first user equipment may perform the at least two scrambling code segments
  • the number of the bit segments to be transmitted may also be greater than the number of the scrambling segments, in which case the first user equipment may And scrambling the at least two scrambling code segments on the CRC bits of the part of the at least two to-be-transmitted bit segments, and not scrambling the CRC bits of the other part of the to-be-transmitted bit segments, or adopting
  • the fixed-value-filled segment scrambles another CRC bit of the to-be-transmitted bit-segment, or repeatedly uses at least one of the at least two scrambled code segments to scramble the CRC bit of another portion of the to-be-transmitted bit-segment,
  • embodiments of the invention are not limited thereto.
  • FIG. 4 is a schematic diagram of the first user equipment performing CRC scrambling according to an embodiment of the present invention. As shown in FIG. 4, the first user equipment has a bit corresponding to the value of the scrambling parameter (ie, a scrambling code bit).
  • the scrambling parameter ie, a scrambling code bit
  • the first user equipment divides the to-be-transmitted bit into two to-be-transmitted bit segments, to be transmitted bit segment 1 and to-be-transmitted bit segment 2, And the first user equipment generates a CRC bit for the to-be-transmitted bit segment 1 and the to-be-transmitted bit segment 2, and then the first user equipment scrambles the scrambling code segment 1 on the CRC bit of the to-be-transmitted bit segment 1. And scrambling the scrambling code segment 2 on the CRC bit of the bit segment 2 to be transmitted.
  • the first user equipment scrambles the to-be-sent bit by using the at least two scrambling code segments, including:
  • the first user equipment generates a CRC bit of the to-be-transmitted bit, and uses the to-be-transmitted bit and the CRC bit of the to-be-transmitted bit as a to-be-scrambled bit;
  • the first user equipment divides the to-be-scrambled bit into at least two to-be-scrambled bit segments;
  • the first user equipment generates a CRC bit of each of the at least two to-be-scrambled bit segments
  • the first user equipment scrambles the at least two scrambling code segments on the CRC bits of the at least two to-be-scrambled bit segments, respectively.
  • the first user equipment may place the CRC of the to-be-transmitted bit after the to-be-transmitted bit.
  • the to-be-transmitted bit and the CRC bit together form a to-be-scrambled bit.
  • the first user equipment will The to-be-scrambled bit is divided into at least two to-be-scrambled bit segments; the first user equipment may generate a CRC for each of the at least two to-be-scrambled bit segments Bit, and the generated CRC bit is placed after the corresponding bit to be scrambled as the actual transmitted bit fragment.
  • the number of the to-be-scrambled bit segments may be equal to the number of the scrambling code segments, and the first user equipment may correspondingly scramble the at least two scrambling code segments in the at least two to-be-scrambled
  • the number of the to-be-scrambled bit segments may be greater than the number of the scrambling code segments. In this case, the first user equipment may scramble the at least two scrambling code segments.
  • At least two of the CRC bits of the to-be-scrambled bit-segment in the bit-segmented bit-segment, and the CRC bits of the other part of the bit-to-scrambled bit-segment are not scrambled, or the segment filled with the fixed value is paired with the other Scrambling the CRC bits of the scrambled bit segments, or repeatedly scrambling the CRC bits of the other portion of the scrambled bit segments by using at least one of the at least two scrambling segments, but embodiments of the present invention are not limited this.
  • FIG. 5 is a schematic diagram of a first user equipment performing CRC scrambling according to another embodiment of the present invention. As shown in FIG. 5, the first user equipment has a bit corresponding to the value of the scrambling parameter (ie, a scrambling code bit).
  • the scrambling parameter ie, a scrambling code bit
  • the first user equipment divides into two scrambling code segments, scrambling code segment 1 and scrambling code segment 2; on the other hand, the first user equipment generates a CRC bit of the to-be-transmitted bit, and places the CRC bit after the to-be-transmitted bit Scrambling the bit, and then the first user equipment divides the to-be-scrambled bit into two to-be-scrambled bit segments, to be scrambled bit segment 1 and to be scrambled bit segment 2, and the first user equipment is respectively to be added
  • the scrambling bit segment 1 and the to-be-scrambled bit segment 2 generate a CRC bit, and then the first user equipment scrambles the scrambling code segment 1 on the CRC bit of the to-be-scrambled bit segment 1, and adds the scrambling code segment 2
  • the interference is on the CRC bit of the bit slice 2 to be scrambled.
  • FIG. 4 and FIG. 5 illustrate that the number of the scrambling code segments is 2.
  • the number of the scrambling code segments may also be other values, and the CRC needs to be scrambled.
  • the number of the bits and the number of the scrambling code segments may have the same or different values, which is not limited by the embodiment of the present invention.
  • the transmitting end determines the value of at least one of the common scrambling code parameter and the specific scrambling code parameter, and scrambles the bit to be transmitted according to the value of the scrambling parameter. It can realize the scrambling of the transmission information in the D2D communication process, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • a D2D communication method according to an embodiment of the present invention is described in detail from the perspective of a transmitting end.
  • a D2D communication method according to an embodiment of the present invention will be described in detail from the perspective of a receiving end with reference to FIG.
  • FIG. 6 shows a schematic flow chart of a D2D communication method 200 according to another embodiment of the present invention. As shown in FIG. 6, the method 200 includes:
  • the second user equipment receives the bit sent by the first user equipment.
  • the second user equipment determines a value of the scrambling parameter of the first user equipment, where the scrambling parameter includes at least one of the following parameters: a public scrambling parameter and a specific scrambling parameter;
  • the second user equipment descrambles the received bit according to the value of the scrambling parameter. Therefore, according to the D2D communication method of the embodiment of the present invention, the receiving end determines a value of at least one of the common scrambling code parameter and the specific scrambling code parameter, and solves the received bit according to the value of the scrambling parameter.
  • the interference can realize the descrambling of the transmission information in the D2D communication process, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • the scrambling parameter includes the common scrambling parameter
  • the value of the common scrambling parameter is determined by the first user equipment according to the D2D synchronization signal
  • the value of the common scrambling parameter is determined by the first user equipment according to the D2D primary synchronization channel PD2DSCH; or
  • the value of the common scrambling parameter is a cluster identifier of the D2D cluster to which the first user equipment belongs.
  • the scrambling parameter includes a specific scrambling parameter
  • the value of the specific scrambling parameter is a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, and the At least one of the service type identifiers of the first user equipment is obtained after a function operation.
  • the value of the specific scrambling parameter is a D2D group identifier of the first user equipment.
  • the value of the specific scrambling parameter is a service type identifier of the first user equipment.
  • the function is a hash function or a truncation function.
  • the second user equipment may belong to the same D2D cluster as the first user equipment, and the second user equipment may obtain the value of the scrambling parameter of the first user equipment in multiple manners.
  • the second user equipment may determine, by using the indication information sent by the control device, a value of the scrambling parameter of the first user equipment, specifically, if the D2D cluster is centralized by the base station Controlling, the second user equipment may obtain the value of the scrambling parameter through the indication information of the base station; and if the D2D cluster is distributedly controlled by the cluster head, the second user equipment may send from the cluster head of the D2D cluster.
  • the value of the scrambling parameter is obtained in the indication information, but the embodiment of the present invention is not limited thereto.
  • the second user equipment and the first user equipment belong to the same D2D cluster, and each user equipment in the D2D cluster may be preset to perform scrambling. And determining the value of the scrambling parameter when descrambling, so that the second user equipment can determine the value of the scrambling parameter in the same manner as the first user equipment, for example, if the first user equipment is performing scrambling When the value of the common scrambling parameter is determined according to the D2D synchronization signal, the second user equipment also determines the value of the common scrambling parameter according to the D2D synchronization signal when descrambling, and so on.
  • step S220 may be specifically implemented by:
  • Manner 1 The second user equipment determines the value of the common scrambling parameter according to the D2D synchronization signal.
  • Manner 2 The second user equipment determines a value of the common scrambling code parameter according to the D2D primary synchronization channel PD2DSCH.
  • Manner 3 The second user equipment determines the cluster identity of the D2D cluster to which the second user equipment belongs as the value of the common scrambling parameter.
  • the method 1 may be specifically: the second user equipment determines the number of the D2D synchronization signal as a value of the common scrambling parameter.
  • the D2D synchronization signal may include a D2D primary synchronization signal.
  • the PD2DSS and the D2D secondary synchronization signal SD2DSS may also be: the second user equipment determines the value of the common scrambling parameter according to the PD2DSS and the SD2DSS.
  • the value of the common scrambling parameter is determined by:
  • the D2D cluster to which the second user equipment belongs may also be different from the D2D cluster to which the first user equipment belongs.
  • the serving base station is the same, and the second user equipment can determine the value of the scrambling parameter by using the indication information sent by the base station, but the embodiment of the present invention is not limited thereto.
  • the second user equipment determines a value of the scrambling parameter of the first user equipment, including: The second user equipment receives the indication information sent by the cluster head of the D2D cluster to which the base station or the second user equipment belongs, where the indication information is used to indicate a value of the scrambling parameter of the first user equipment.
  • the second user equipment determines, according to the indication information, a value of the scrambling parameter.
  • the indication information may indicate the value of the 4th code parameter explicitly or implicitly, and the second user equipment may determine the value of the scrambling code parameter according to the indication information, where the value of the scrambling code parameter may be specific The value of the common scrambling parameter and/or the value of the specific scrambling parameter, but the embodiment of the invention is not limited thereto.
  • the first user equipment may use data channel scrambling or CRC force interference when scrambling the to-be-transmitted bit, and the second user equipment also performs descrambling on the received bit.
  • Data channel descrambling or CRC descrambling can be employed accordingly. If the data received by the second user equipment is descrambled by the data channel, optionally, S230, the second user equipment descrambles the received bit according to the value of the scrambling parameter, including:
  • the second user equipment determines an initial value of the scrambling code according to the value of the scrambling code parameter; S232, the second user equipment generates a scrambling code sequence according to the initial value of the scrambling code, and uses the scrambling code sequence to solve the 4 The bit to.
  • step S231 can be implemented by using the following implementation manners:
  • the second user equipment determines the value of the common scrambling parameter as the initial value of the scrambling code
  • the second user equipment determines the value of the specific scrambling parameter as the initial value of the scrambling code
  • the second user equipment determines the initial value of the 4th code according to the value of the scrambling parameter and the current time slot number.
  • the value of the scrambling parameter may be specifically the value of the common scrambling parameter and/or the value of the specific scrambling parameter, where the current slot number may be that the second user equipment receives the bit.
  • the number of the occupied time slot, wherein the time slot in which the second user equipment receives the bit is the same as the time slot in which the first user equipment sends the bit, but the embodiment of the present invention is not limited thereto.
  • the initial value of the 4th code c, mt may be determined by:
  • the current time slot number, ⁇ 2 ⁇ is the value of the common scrambling code parameter or the value of the specific scrambling code parameter.
  • the initial value of the scrambling code may be determined by:
  • the value of the common scrambling parameter is the value of the specific scrambling parameter.
  • the initial value of the scrambling code may also be determined by other formulas, and the embodiment of the present invention is not limited thereto.
  • the second user equipment may also perform CRC descrambling on the received bit, optionally, in some specific cases, for example, a bit corresponding to the value of the scrambling parameter.
  • the number exceeds the number of bits of the CRC bit to be descrambled, that is, the number of bits corresponding to the value of the scrambling parameter is greater than 24, and the first user equipment divides the value of the scrambling parameter into multiple scrambling segments for scrambling, corresponding
  • the second user equipment may also divide the value of the scrambling code parameter into multiple scrambling code segments, and use the multiple scrambling code segments to descramble the received bits.
  • the bit received by the second user equipment includes at least two bit segments to be descrambled, and each of the at least two to-be-descrambled bit segments includes a data bit segment and a CRC bit;
  • the second user equipment uses the scrambling code sequence to descramble the received bit, including:
  • the second user equipment divides the value of the scrambling code parameter into at least two scrambling code segments; S234, the second user equipment uses the at least two scrambling code segments to descramble the at least two to-be-descrambled bit segments respectively
  • the CRC bits are obtained to obtain at least two bit segments to be checked.
  • the second user equipment may divide the value of the scrambling parameter into two scrambling code segments, scrambling code segment 1 and scrambling code segment. 2, and accordingly the received bit is divided into two bit segments, bit segment 1 and bit segment 2; Then, the second user equipment may use the scrambling code segment 1 to descramble the bit segment 1 to obtain the bit segment 1 to be verified, and use the scrambling code segment 2 to descramble the bit segment 2 to obtain the bit segment 2 to be verified. Referring to FIG.
  • the bit segment 1 to be verified corresponds to the CRC bit of the bit segment 1 to be transmitted and the bit segment 1 to be transmitted
  • the bit segment 2 to be verified corresponds to the bit segment 2 to be transmitted and the to-be-sent
  • the CRC bit of the bit segment 2 wherein the bit segment to be transmitted is a data bit segment.
  • the bit segment 1 to be verified corresponds to the CRC bit of the bit segment 1 to be transmitted and the bit segment 1 to be transmitted
  • the bit segment 2 to be verified corresponds to the bit segment 2 to be scrambled.
  • the CRC bit of the bit segment 2 to be transmitted but the embodiment of the present invention is not limited thereto.
  • the method 200 further includes:
  • the second user equipment performs a CRC check on each of the at least two to-be-checked bit segments to obtain a data bit segment of each of the to-be-checked bit segments.
  • the second user equipment concatenates the data bit segments of the at least two bit segments to be checked to obtain data bits.
  • the second user equipment may perform CRC check on the to-be-checked bit segment 1 and the to-be-checked bit segment 2, respectively. Obtaining a bit segment 1 to be transmitted and a bit segment 2 to be transmitted, and then the second user equipment cascading the to-be-transmitted bit segment 1 and the to-be-transmitted bit segment 2 to obtain a to-be-transmitted bit of the first user equipment,
  • the data to be transmitted is the data bit, and at this time, the data bit is the original data bit of the first user equipment.
  • the second user equipment may separately check the bit segment 1 to be checked and the to-be-checked bit.
  • Fragment 2 performs a CRC check to obtain a to-be-scrambled bit segment 1 and a to-be-scrambled bit segment 2, and then the second user equipment cascades the to-be-scrambled bit segment 1 and the to-be-scrambled bit segment 2 to obtain the a to-be-scrambled bit of the first user equipment, where the to-be-scrambled bit includes a to-be-transmitted bit and a CRC bit, and the to-be-transmitted bit is a data bit, and the second user equipment needs to perform a CRC check again to obtain the The bit to be transmitted of the first user equipment, that is, the original data bit.
  • the data bit includes a raw data bit and a CRC bit; and correspondingly, the method 200 further includes:
  • the second user equipment performs CRC check on the data bit to obtain the original data bit.
  • the receiving end determines the common scrambling code parameter And the value of at least one of the scrambling parameters of the specific scrambling parameter, and descrambling the received bit according to the value of the scrambling parameter, thereby realizing descrambling of the transmission information in the D2D communication process, thereby improving D2D The feasibility of the communication solution and enhance the user experience.
  • the D2D communication method according to the embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 6, and the user equipment according to the embodiment of the present invention will be described below with reference to FIG. 7 to FIG.
  • FIG. 7 shows a schematic block diagram of a user equipment 300 in accordance with an embodiment of the present invention.
  • the user equipment 300 includes:
  • the determining module 310 is configured to determine a value of the scrambling parameter, where the scrambling parameter includes at least one of the following parameters: a common scrambling parameter and a specific scrambling parameter;
  • the scrambling module 320 is configured to scramble a bit to be transmitted according to the value of the scrambling parameter determined by the determining module 310.
  • the sending module 330 is configured to send the to-be-transmitted bit scrambled by the scrambling module 320.
  • the user equipment by determining the value of at least one of the common scrambling parameter and the specific scrambling parameter, and scrambling the transmission bit according to the value of the scrambling parameter, can In the D2D communication process, the transmission information is scrambled, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • the scrambling code parameter includes the common scrambling code parameter.
  • the determining module 310 includes: a first determining unit 311, where
  • the first determining unit 311 determines the value of the common scrambling parameter according to the D2D synchronization signal.
  • the first determining unit 311 is configured to determine a value of the common scrambling code parameter according to the D2D primary synchronization channel PD2DSCH; or
  • the first determining unit 311 is configured to determine the cluster identifier of the D2D cluster to which the user equipment 300 belongs as the value of the common scrambling parameter.
  • the first determining unit 311 is specifically configured to determine a number of the D2D synchronization signal as a value of the common scrambling parameter.
  • the D2D synchronization signal includes a D2D primary synchronization signal.
  • the first determining unit 311 is specifically configured to determine a value of the common scrambling parameter according to the PD2DSS and the SD2DSS.
  • the value of the common scrambling parameter ⁇ 2 " is determined by: Where N s should be ss the number of the SD2DSS and N PD2DSS is the number of the PD2DSS.
  • the scrambling parameter includes the specific scrambling parameter; and correspondingly, the determining module 310 includes:
  • the second determining unit 312 is configured to determine a value of the specific scrambling parameter according to the D2D identifier of the user equipment 300, the D2D group identifier of the user equipment 300, and the service type identifier of the user equipment 300.
  • the second determining unit 312 is specifically configured to:
  • the second determining unit 312 is specifically configured to:
  • Determining a value of the specific scrambling parameter according to at least one of a D2D identifier of the user equipment 300, a D2D group identifier of the user equipment 300, and a service type identifier of the user equipment 300, and a hash function; or
  • the value of the specific scrambling parameter is determined according to at least one of the D2D identifier of the user equipment 300, the D2D group identifier of the user equipment 300, and the service type identifier of the user equipment 300.
  • the determining module 310 includes:
  • the receiving unit 313 is configured to receive indication information sent by the base station or the cluster of the D2D cluster to which the user equipment 300 belongs, where the indication information is used to indicate a value of the 4th code parameter;
  • the third determining unit 314 is configured to determine a value of the scrambling parameter according to the indication information received by the receiving unit 313.
  • the value of the scrambling parameter may be specifically a value of a common scrambling parameter and/or a value of a specific scrambling parameter.
  • the scrambling module 320 includes:
  • the determining unit 321 is configured to determine, according to the value of the scrambling code parameter determined by the determining module 310, an initial value of the scrambling code;
  • the first scrambling unit 322 is configured to generate a scrambling code sequence according to the scrambling code initial value determined by the determining unit 321, and use the scrambling code sequence to scramble the to-be-transmitted bit.
  • the determining unit 321 is specifically configured to:
  • the value of the specific scrambling parameter is determined as the initial value of the scrambling code.
  • the determining unit 321 is specifically configured to determine the initial value of the scrambling code according to the value of the scrambling parameter determined by the determining module 310 and the current slot number.
  • the determining unit 321 is specifically configured to determine the initial value of the scrambling code c according to the following formula:
  • s is the current time slot number
  • ⁇ 2 ⁇ is the value of the common scrambling parameter or the value of the specific scrambling parameter.
  • the determining unit 321 is specifically configured to determine the initial value of the scrambling code c according to the following formula:
  • the value of the common scrambling parameter is the value of the specific scrambling parameter.
  • the scrambling module 320 includes:
  • a segmentation unit 323, configured to divide the value of the scrambling code parameter determined by the determining module 310 into at least two scrambling code segments;
  • the second scrambling unit 324 is configured to scramble the to-be-sent bit by using the at least two scrambling segments divided by the segmentation unit 323.
  • the second scrambling unit 324 includes:
  • a first generating sub-unit 324a configured to generate a cyclic redundancy code check (CRC) bit of the to-be-transmitted bit, and use the to-be-transmitted bit and the CRC bit of the to-be-transmitted bit as a to-be-scrambled bit
  • a first segment sub-unit 324b configured to divide the to-be-scrambled bit generated by the first generation sub-unit 324a into at least two to-be-scrambled bit segments;
  • the first generating sub-unit 324a is further configured to generate a CRC bit of each of the at least two to-be-scrambled bit segments into which the first segment sub-unit 324b is divided;
  • the first scrambling sub-unit 324c is configured to scramble the at least two scrambling code segments respectively on the CRC bits of the at least two to-be-scrambled bit segments generated by the first generating sub-unit 324a.
  • the second scrambling unit 324 includes:
  • a second segment sub-unit 324d configured to divide the to-be-transmitted bit into at least two bit segments to be transmitted
  • a second generation sub-unit 324e configured to generate a CRC bit of each of the at least two to-be-transmitted bit segments into which the second segment sub-unit 324d is divided;
  • the second scrambling sub-unit 324f is configured to separately scramble the at least two scrambling code segments on the CRC bits of the at least two to-be-transmitted bit segments generated by the second generating sub-unit 324e.
  • the user equipment 300 may correspond to the first user equipment in the D2D communication method according to the embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the user equipment 300 respectively implement FIG.
  • the corresponding processes to the respective methods in FIG. 5 are not described here.
  • the user equipment by determining the value of at least one of the common scrambling parameter and the specific scrambling parameter, and scrambling the transmission bit according to the value of the scrambling parameter, can In the D2D communication process, the transmission information is scrambled, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • FIG. 8 is a schematic block diagram of a user equipment 400 according to another embodiment of the present invention. As shown in FIG. 8, the user equipment 400 includes:
  • the receiving module 410 is configured to receive a bit sent by the first user equipment.
  • the determining module 420 is configured to determine a value of the scrambling parameter of the first user equipment, where the scrambling parameter includes at least one of the following parameters: a common scrambling parameter and a specific scrambling parameter;
  • the descrambling module 430 is configured to descramble the bit received by the receiving module 410 according to the value of the scrambling parameter determined by the determining module 420.
  • the user equipment determines the value of at least one of the common scrambling code parameter and the specific scrambling code parameter, and descrambles the received bit according to the value of the scrambling code parameter, Ability to descramble transmission information during D2D communication, thereby improving D2D The feasibility of the communication solution and enhance the user experience.
  • the value of the common scrambling parameter is determined by the first user equipment according to the D2D synchronization signal.
  • the value of the common scrambling parameter is determined by the first user equipment according to the D2D primary synchronization channel PD2DSCH; or
  • the value of the common scrambling parameter is a cluster identifier of the D2D cluster to which the first user equipment belongs.
  • the scrambling parameter includes the specific scrambling parameter
  • the value of the specific scrambling parameter is a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, and At least one of the service type identifiers of the first user equipment is obtained after being operated by a preset function.
  • the value of the specific scrambling parameter is a D2D identifier of the first user equipment
  • the value of the specific scrambling parameter is a D2D group identifier of the first user equipment.
  • the value of the specific scrambling parameter is a service type identifier of the first user equipment.
  • the function is a hash function or a truncation function.
  • the determining module 420 includes: a first determining unit 421, where
  • the first determining unit 421 is configured to determine a value of the common scrambling parameter according to the D2D synchronization signal;
  • the first determining unit 421 is configured to determine a value of the common scrambling code parameter according to the D2D primary synchronization channel PD2DSCH; or
  • the first determining unit 421 is configured to determine a cluster identifier of the D2D cluster to which the user equipment 400 belongs as a value of the common scrambling parameter.
  • the first determining unit 421 is specifically configured to determine a number of the D2D synchronization signal as a value of the common scrambling parameter.
  • the D2D synchronization signal includes a D2D primary synchronization signal PD2DSS and a D2D secondary synchronization signal SD2DSS;
  • the first determining unit 421 is specifically configured to determine a value of the common scrambling parameter according to the PD2DSS and the SD2DSS.
  • the receiving unit 422 is configured to receive the indication information sent by the base station or the cluster of the D2D cluster to which the user equipment 400 belongs, where the indication information is used to indicate a value of the scrambling parameter of the first user equipment;
  • the second determining unit 423 is configured to determine a value of the scrambling parameter according to the indication information received by the receiving unit 422.
  • the user equipment 400 may also use the data channel descrambling manner to receive the bit.
  • the descrambling module 430 includes:
  • a third determining unit 431, configured to determine an initial value of the scrambling code according to the value of the scrambling parameter determined by the determining module 420;
  • the first descrambling unit 432 is configured to generate a scrambling code sequence according to the scrambling code initial value determined by the third determining unit 431, and use the scrambling code sequence to descramble the received bit.
  • the third determining unit 431 is specifically configured to:
  • the value of the specific scrambling parameter is determined as the initial value of the scrambling code.
  • the third determining unit 431 is specifically configured to determine the initial value of the scrambling code according to the value of the scrambling parameter determined by the determining module 420 and the current slot number.
  • the third determining unit 431 is specifically configured to determine the initial value of the 4th code c i,nit according to the following formula:
  • s is the current time slot number
  • ⁇ 2 ⁇ is the value of the common scrambling code parameter or the value of the specific scrambling code number.
  • the third determining unit 431 is specifically configured to determine the initial value c of the scrambling code according to the following formula.
  • the value of the common scrambling parameter is the value of the specific scrambling parameter.
  • the user equipment 400 may also perform descrambling on the received bits by using a CRC descrambling manner.
  • the bit received by the receiving module 410 includes at least two bit segments, each of the at least two bit segments includes a data bit segment and a CRC bit;
  • the descrambling module 430 includes:
  • a segmentation unit 433, configured to divide the value of the scrambling code parameter determined by the determining module 420 into at least two scrambling code segments;
  • the second descrambling unit 434 is configured to descramble the CRC bits of the at least two bit segments by using the at least two scrambling segments divided by the segmentation unit 433 to obtain at least two bit segments to be checked.
  • the user equipment 400 further includes:
  • the CRC check module 440 is configured to perform CRC check on each of the at least two to-be-checked bit segments obtained by the second descrambling unit 434 to obtain the to-be-checked bit. a data bit segment of the segment;
  • the cascading module 450 is configured to concatenate the data bit segments of the at least two to-be-checked bit segments obtained by the CRC check module 440 to obtain data bits.
  • the data bit obtained by the cascading module 450 includes an original data bit and a CRC bit; correspondingly,
  • the CRC check module 440 is further configured to perform a CRC check on the data bits obtained by the cascading module 450 to obtain the original data bits.
  • the user equipment 400 may correspond to a second user equipment in the D2D communication method according to an embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the user equipment 400 are respectively implemented to implement FIG. The corresponding processes of the various methods in the process are not repeated here.
  • the user equipment determines the common scrambling parameter and the specific interference. a value of at least one of the code parameters, and descrambling the received bit according to the value of the scrambling parameter, capable of descrambling the transmission information in the D2D communication process, thereby improving the D2D communication scheme Feasibility and enhance the user experience.
  • FIG. 9 shows a schematic block diagram of a user equipment 500 in accordance with yet another embodiment of the present invention.
  • the user equipment 500 includes: a processor 510 and a transmitter 520. among them,
  • the processor 510 is configured to determine a value of the scrambling parameter, the scrambling parameter comprising at least one of the following parameters: a common scrambling parameter and a specific scrambling parameter; and scrambling the to-be-transmitted bit according to the value of the scrambling parameter ;
  • the transmitter 520 is configured to send the to-be-transmitted bit scrambled by the processor 510.
  • the user equipment by determining the value of at least one of the common scrambling parameter and the specific scrambling parameter, and scrambling the transmission bit according to the value of the scrambling parameter, can In the D2D communication process, the transmission information is scrambled, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • the processor 510 may be a central processing unit (English full name: Central Processing Unit, English abbreviation: CPU), and the processor 510 may also be other general-purpose processors, digital signal processors ( DSP), application specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the user equipment 500 can also include a memory that can include read only memory and random access memory and provides instructions and data to the processor 510.
  • a portion of the memory may also include non-volatile random access memory.
  • the memory can also store information of the device type.
  • the steps of the above method may be completed by an integrated logic circuit of hardware in the processor 510 or an instruction in the form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in random memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, etc., which are well established in the art.
  • the storage medium is located in the memory, and the processor 510 reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the scrambling parameter includes the common scrambling parameter; and correspondingly, the processor 510 is specifically configured to: Determining a value of the common scrambling parameter according to the D2D synchronization signal; or
  • the processor 510 is specifically configured to determine a number of the D2D synchronization signal as a value of the common scrambling parameter.
  • the D2D synchronization signal includes a D2D primary synchronization signal.
  • the processor 510 is specifically configured to determine a value of the common scrambling parameter according to the PD2DSS and the SD2DSS.
  • the value of the common scrambling parameter ⁇ 3 ⁇ 4 2 " ⁇ is determined by:
  • the scrambling parameter includes the specific scrambling parameter; and correspondingly, the processor 510 is specifically configured to:
  • the value of the specific scrambling parameter is determined according to at least one of the D2D identifier of the user equipment 500, the D2D group identifier of the user equipment 500, and the service type identifier of the user equipment 500.
  • the processor 510 is specifically configured to:
  • the processor 510 is specifically configured to:
  • Determining a value of the specific scrambling parameter according to at least one of a D2D identifier of the user equipment 500, a D2D group identifier of the user equipment 500, and a service type identifier of the user equipment 500, and a hash function; or
  • the value of the specific scrambling parameter is determined according to at least one of the D2D identifier of the user equipment 500, the D2D group identifier of the user equipment 500, and the service type identifier of the user equipment 500.
  • the user equipment 500 further includes:
  • the receiver 530 is configured to receive, by the base station or the cluster head of the D2D cluster to which the user equipment 500 belongs, indication information, where the indication information is used to indicate a value of the scrambling parameter;
  • the processor 510 is specifically configured to: according to the indication information received by the receiver 530, optionally, in another embodiment, the processor 510 is specifically configured to determine an initial value of the scrambling code according to the value of the scrambling code parameter, and generate a scrambling code sequence according to the initial value of the scrambling code, and use the scrambling code sequence to add Disturb the bit to be transmitted.
  • the processor 510 is specifically configured to:
  • the value of the specific scrambling parameter is determined as the initial value of the scrambling code.
  • the processor 510 is specifically configured to determine the initial value of the scrambling code according to the value of the scrambling parameter and the current slot number.
  • the processor 510 is specifically configured to determine a scrambling code according to the following formula: 2 x iV + l) x 2 9 + iV DID ( 22 ) ⁇ 2 9 + ⁇ DID ( 23 )
  • s is the current time slot number
  • ⁇ 2 ⁇ is the value of the common scrambling parameter or the value of the specific scrambling parameter.
  • the processor 510 is specifically configured to determine a scrambling code initial value c ⁇ according to the following formula:
  • the value of the common scrambling parameter is the value of the specific scrambling parameter.
  • the processor 510 is specifically configured to: divide the value of the scrambling code parameter into at least two scrambling code segments; and scramble the to-be-transmitted bit by using the at least two scrambling code segments.
  • the processor 510 is specifically configured to: generate a cyclic redundancy check (CRC) bit of the to-be-transmitted bit, and set the to-be-transmitted bit and the CRC of the to-be-transmitted bit a bit as a to-be-scrambled bit; dividing the to-be-scrambled bit into at least two bits to be scrambled; generating a CRC bit of each of the at least two bits to be scrambled to be scrambled; and The two scrambling code segments are respectively scrambled on the CRC bits of the at least two to-be-scrambled bit segments.
  • CRC cyclic redundancy check
  • the processor 510 is specifically configured to divide the to-be-transmitted bit into at least two to-be-transmitted bit segments; and generate a CRC of each of the at least two to-be-transmitted bit-segments. Bits; and scrambling the at least two scrambling code segments on the CRC bits of the at least two bit segments to be transmitted, respectively.
  • the user equipment 500 may correspond to the first user equipment in the D2D communication method according to the embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the user equipment 500 respectively implement FIG. 1
  • the corresponding processes to the respective methods in FIG. 5 are not described here.
  • the user equipment by determining the value of at least one of the common scrambling parameter and the specific scrambling parameter, and scrambling the transmission bit according to the value of the scrambling parameter, can In the D2D communication process, the transmission information is scrambled, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • FIG. 10 is a schematic block diagram of a user equipment 600 according to still another embodiment of the present invention. As shown in FIG. 10, the user equipment 600 includes:
  • the receiver 610 is configured to receive a bit sent by the first user equipment.
  • the processor 620 is configured to determine a value of the scrambling parameter of the first user equipment, where the scrambling parameter includes at least one of the following parameters: a common scrambling parameter and a specific scrambling parameter; and a value according to the scrambling parameter
  • the bit received by the receiver 610 is descrambled.
  • the user equipment determines the value of at least one of the common scrambling code parameter and the specific scrambling code parameter, and descrambles the received bit according to the value of the scrambling code parameter, It can realize the descrambling of the transmission information in the D2D communication process, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • the processor 610 may be a central processing unit, and the processor 610 may also be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), and off-the-shelf programmable Gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGA off-the-shelf programmable Gate array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the user equipment 600 may further include a memory, where the memory may include a read-only memory.
  • the memory and random access memory provide instructions and data to processor 620.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the steps of the above method may be completed by an integrated logic circuit of hardware in the processor 620 or an instruction in the form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in random memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, etc., which are well established in the art.
  • the storage medium is located in the memory, and the processor 620 reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the value of the common scrambling parameter is determined by the first user equipment according to the D2D synchronization signal.
  • the value of the common scrambling parameter is determined by the first user equipment according to the D2D primary synchronization channel PD2DSCH; or
  • the value of the common scrambling parameter is a cluster identifier of the D2D cluster to which the first user equipment belongs.
  • the scrambling parameter includes the specific scrambling parameter
  • the value of the specific scrambling parameter is a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, and At least one of the service type identifiers of the first user equipment is obtained after being operated by a preset function.
  • the value of the specific scrambling parameter is the value of the first user equipment.
  • the value of the specific scrambling parameter is a D2D group identifier of the first user equipment.
  • the value of the specific scrambling parameter is a service type identifier of the first user equipment.
  • the function is a hash function or a truncation function.
  • the processor 620 is specifically configured to:
  • the processor 620 is specifically configured to determine a number of the D2D synchronization signal as a value of the common scrambling parameter.
  • the D2D synchronization signal includes a D2D primary synchronization signal.
  • the processor 620 is specifically configured to determine a value of the common scrambling parameter according to the PD2DSS and the SD2DSS.
  • the processor 620 is specifically configured to determine a value of the common scrambling code parameter according to the following formula: V D′ 2D
  • N SD2DSS is the number of the SD2DSS
  • PD2DSS is the number of the PD2DSS.
  • the receiver 610 is further configured to receive, by the base station or the cluster head of the D2D cluster to which the user equipment 600 belongs, indication information, where the indication information is used to indicate the scrambling code of the first user equipment. The value of the parameter;
  • the processor 620 is further configured to determine a value of the scrambling code parameter according to the indication information received by the receiver 610.
  • the user equipment 600 may also use the data channel descrambling manner to receive the bit.
  • the processor 620 is specifically configured to determine an initial value of the scrambling code according to the value of the scrambling code parameter; and generate a scrambling code sequence according to the initial value of the scrambling code, and use the scrambling code sequence solution 4 to receive the This bit.
  • the processor 620 is specifically configured to:
  • the value of the specific scrambling parameter is determined as the initial value of the scrambling code.
  • the processor 620 is specifically configured to determine the initial value of the scrambling code according to the value of the scrambling parameter and the current slot number.
  • the processor 620 is specifically configured to determine the initial value c of the scrambling code according to the following formula:
  • s is the current time slot number
  • ⁇ 2 ⁇ is the value of the common scrambling code parameter or the value of the specific scrambling code number.
  • the processor 620 is specifically configured to determine the scrambling code according to the following formula: Initial value C i,nit '
  • the value of the common scrambling parameter is the value of the specific scrambling parameter.
  • the user equipment 600 may also descramble the received bits by using a CRC descrambling manner.
  • the bit received by the receiver 610 includes at least two bit segments, each of the at least two bit segments including a data bit segment and a CRC bit;
  • the processor 620 is specifically configured to divide the value of the scrambling code parameter into at least two scrambling code segments; and respectively descramble the CRC bits of the at least two bit segments by using the at least two scrambling code segments to obtain at least Two bit segments to be verified.
  • the processor 620 is further configured to perform a CRC check on each of the obtained at least two to-be-checked bit segments to obtain the to-be-calibrated And determining a data bit segment of the bit segment; and cascading the data bit segments of the at least two bit segments to be checked to obtain data bits.
  • the data bit obtained by the processor 620 includes an original data bit and a CRC bit; correspondingly,
  • the processor 620 is also operative to perform a CRC check on the data bits to obtain the original data bits.
  • the user equipment 600 may correspond to a second user equipment in the D2D communication method according to an embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the user equipment 600 respectively implement FIG. The corresponding processes of the various methods in the process are not repeated here.
  • the user equipment determines the value of at least one of the common scrambling code parameter and the specific scrambling code parameter, and descrambles the received bit according to the value of the scrambling code parameter, It can realize the descrambling of the transmission information in the D2D communication process, thereby improving the feasibility of the D2D communication scheme and improving the user experience.
  • the term "and/or" is merely an association relationship describing an associated object, indicating that there may be three relationships.
  • a and / or B can mean: There are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" in this article generally means that the contextual object is an "or" relationship.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions.
  • a computer device which may be a personal computer, server, or network device, etc.
  • the foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (English full name: Read-Only Memory, English abbreviation: ROM), a random access memory (English full name: Random Access Memory, English abbreviation: RAM), magnetic A variety of media that can store program code, such as a disc or a disc.

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Abstract

本发明公开了一种D2D通信方法和用户设备,该D2D通信方法包括:第一用户设备确定扰码参数的值,该扰码参数包括下列参数中的至少一种:公共扰码参数和特定扰码参数;该第一用户设备根据该扰码参数的值,加扰待发送比特;该第一用户设备发送加扰后的待发送比特。本发明公开的D2D 通信方法和用户设备,能够在D2D通信过程中实现对传输信息的加扰和解扰,提高D2D通信方案的可行性并提升用户体验。

Description

设备到设备通信方法和用户设备 技术领域
本发明实施例涉及通信领域, 并且更具体地, 涉及设备到设备通信方法 和用户设备。 背景技术
用户设备(英文全称: User Equipment, 英文缩写: UE )之间的设备到 设备临近服务(英文全称: Device to Device Proximity Service, 英文缩写: D2D ProSe )已经成为长期演进(英文全称: Long Term Evolution,英文缩写: LTE ) 系统的热点课题。 目前, 设备到设备(英文全称: Device to Device, 英文缩写: D2D ) 通信的功能已经应用在现有的一些集群系统以及一些 walki-talki设备上。 由于 LTE系统商业化的巨大成功, 因此在 LTE系统物理 层的基础上提供 D2D ProSe既可以丰富 LTE系统的业务范围, 也使得 D2D 通信可以被更多的用户所使用。
LTE系统中的扰码主要分为两类, 一类为数据信道扰码, 用于对数据信 道进行加扰,能够实现干扰随机化和对用户加密;另一类为循环冗余校验(英 文全称: Cyclic Redundancy Check, 英文缩写: CRC )扰码, 用于加在待发 送信息之后的对 CRC加扰, 能够隐性地提供额外的信息并且区分不同的用 户。
到目前为止, 还没有针对 D2D通信的扰码方案。 因此, 在进行 D2D通 信的过程中,发送端如何加扰待发送信息以及接收端如何对接收到的信息进 行解扰是亟待解决的问题。 发明内容
本发明实施例提供一种 D2D通信方法和用户设备, 能够在 D2D通信过 程中实现对传输信息的加扰和解扰。
第一方面, 本发明实施例提供了一种 D2D通信方法, 包括: 第一用户 设备确定扰码参数的值, 该扰码参数包括下列参数中的至少一种: 公共扰码 参数和特定扰码参数; 该第一用户设备根据该扰码参数的值, 加扰待发送比 特; 该第一用户设备发送加扰后的待发送比特。 结合第一方面, 在第一种可能的实现方式中, 该扰码参数包括该公共扰 码参数; 该第一用户设备确定扰码参数的值, 包括: 该第一用户设备根据
D2D同步信号, 确定该公共扰码参数的值; 或该第一用户设备根据 D2D主 同步信道 PD2DSCH, 确定该公共扰码参数的值; 或该第一用户设备将该第 5 一用户设备所属的 D2D簇的簇标识确定为该公共扰码参数的值。
结合第一方面的第一种可能的实现方式, 在第二种可能的实现方式中, 该第一用户设备根据 D2D 同步信号, 确定该公共扰码参数的值, 包括: 该 第一用户设备将该 D2D同步信号的编号确定为该公共扰码参数的值。
结合第一方面的第一种可能的实现方式, 在第三种可能的实现方式中, 10 该 D2D同步信号包括 D2D主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS; 该第一用户设备根据 D2D 同步信号, 确定该公共扰码参数的值, 包括: 该 第一用户设备根据该 PD2DSS和该 SD2DSS, 确定该公共扰码参数的值。
结合第一方面的第三种可能的实现方式, 在第四种可能的实现方式中, 该公共扰码参数的值 N;c 由下式确定:
I J L D2D J ^ V SD2DSS ^ 1 V PD2DSS
其中, N SD2DSS为该 SD2DSS的编号, N PD2DSS为该 PD2DSS的编号。 结合第一方面或结合第一方面的上述可能的实现方式,在第五种可能的 实现方式中, 该扰码参数包括该特定扰码参数; 该第一用户设备确定扰码参 数的值, 包括: 该第一用户设备根据该第一用户设备的 D2D标识、 该第一 0 用户设备的 D2D组标识和该第一用户设备的业务类型标识中的至少一种标 识, 确定该特定扰码参数的值。
结合第一方面的第五种可能的实现方式, 在第六种可能的实现方式中, 该第一用户设备根据该第一用户设备的 D2D标识、 该第一用户设备的 D2D 组标识和该第一用户设备的业务类型标识中的至少一种标识,确定该特定扰 5 码参数的值, 包括: 该第一用户设备将该第一用户设备的 D2D标识确定为 该特定扰码参数的值; 或该第一用户设备将该第一用户设备的 D2D组标识 确定为该特定扰码参数的值; 或该第一用户设备将该第一用户设备的业务类 型标识确定为该特定扰码参数的值。
结合第一方面的第五种可能的实现方式, 在第七种可能的实现方式中, 30 该第一用户设备根据该第一用户设备的 D2D标识、 该第一用户设备的 D2D 组标识和该第一用户设备的业务类型标识中的至少一种标识 ,确定该特定扰 码参数的值, 包括: 该第一用户设备根据该第一用户设备的 D2D标识、 该 第一用户设备的 D2D组标识和该第一用户设备的业务类型标识中的至少一 种标识以及散列函数, 确定该特定扰码参数的值; 或该第一用户设备根据该 第一用户设备的 D2D标识、 该第一用户设备的 D2D组标识和该第一用户设 备的业务类型标识中的至少一种标识和截短函数, 确定该特定扰码参数的 值。
结合第一方面, 在第八种可能的实现方式中, 该第一用户设备确定扰码 参数的值, 包括: 该第一用户设备接收基站或该第一用户设备所属的 D2D 簇的簇头发送的指示信息, 该指示信息用于指示该扰码参数的值; 该第一用 户设备根据该指示信息, 确定该扰码参数的值。
结合第一方面或结合第一方面的上述可能的实现方式,在第九种可能的 实现方式中,该第一用户设备根据该扰码参数的值,加扰待发送比特, 包括: 该第一用户设备根据该扰码参数的值, 确定扰码初始值; 该第一用户设备根 据该扰码初始值, 生成扰码序列, 利用该扰码序列加扰该待发送比特。
结合第一方面的第九种可能的实现方式, 在第十种可能的实现方式中, 该第一用户设备根据该扰码参数的值, 确定扰码初始值, 包括: 该第一用户 设备将该公共扰码参数的值确定为该扰码初始值; 或该第一用户设备将该特 定扰码参数的值确定为该扰码初始值。
结合第一方面的第九种可能的实现方式, 在第十一种可能的实现方式 中, 该第一用户设备根据该扰码参数的值, 确定扰码初始值, 包括: 该第一 用户设备根据该扰码参数的值以及当前时隙编号, 确定该扰码初始值。
结合第一方面的第十一种可能的实现方式,在第十二种可能的实现方式 中, 该扰码初始值 cinit由下式确定:
+ 1) X (2 X ND2D + 1) X 29 + ND2D , 或 29 + ND2D
Figure imgf000004_0001
其中, 《s为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 数的值。
结合第一方面的第十一种可能的实现方式,在第十三种可能的实现方式 , 该 4尤码初始值 cinit由下式确定: init + Ns"2 e D c , 或
Figure imgf000005_0001
其中, s为当前时隙编号, vmm为公共扰码参数的值, VJ^为特定扰 码参数的值。
结合第一方面或结合第一方面的上述第一种至第八种可能的实现方式 中的任一种可能的实现方式, 在第十四种可能的实现方式中, 该第一用户设 备根据该扰码参数的值, 加扰待发送比特, 包括: 该第一用户设备将该扰码 参数的值分成至少两个扰码片段; 该第一用户设备利用该至少两个扰码片段 加扰该待发送比特。
结合第一方面的第十四种可能的实现方式,在第十五种可能的实现方式 中, 该第一用户设备利用该至少两个扰码片段加扰该待发送比特, 包括: 该 第一用户设备生成该待发送比特的循环冗余码校验 CRC比特, 并将该待发 送比特与该待发送比特的 CRC比特作为待加扰比特; 该第一用户设备将该 待加扰比特分成至少两个待加扰比特片段; 该第一用户设备生成该至少两个 待加扰比特片段中的每个待加扰比特片段的 CRC比特; 该第一用户设备将 该至少两个扰码片段加扰在该至少两个待加扰比特片段的 CRC比特上。
结合第一方面的第十四种可能的实现方式,在第十六种可能的实现方式 中, 该第一用户设备利用该至少两个扰码片段加扰该待发送比特, 包括: 该 第一用户设备将该待发送比特分成至少两个待发送比特片段; 该第一用户设 该第一用户设备将该至少两个扰码片段加扰在该至少两个待发送比特片段 的 CRC比特上。
第二方面, 本发明实施例提供了另一种 D2D通信方法, 包括: 第二用 户设备接收第一用户设备发送的比特; 该第二用户设备确定该第一用户设备 的扰码参数的值, 该扰码参数包括下列参数中的至少一种: 公共扰码参数和 特定扰码参数;该第二用户设备根据该扰码参数的值,解扰接收到的该比特。
结合第二方面, 在第一种可能的实现方式中, 该公共扰码参数的值是该 第一用户设备根据 D2D 同步信号确定的; 或该公共扰码参数的值是该第一 用户设备根据 D2D主同步信道 PD2DSCH确定的; 或该公共扰码参数的值 为该第一用户设备所属的 D2D簇的簇标识。
结合第二方面或结合第二方面的第一种可能的实现方式,在第二种可能 的实现方式中, 该特定扰码参数的值是利用该第一用户设备的 D2D标识、 该第一用户设备的 D2D组标识和该第一用户设备的业务类型标识中的至少 一种标识经过预设函数运算后得到的。
结合第二方面的第二种可能的实现方式, 在第三种可能的实现方式中, 该特定扰码参数的值为该第一用户设备的 D2D标识; 或该特定扰码参数的 值为该第一用户设备的 D2D组标识; 或该特定扰码参数的值为该第一用户 设备的业务类型标识。
结合第二方面的第二种可能的实现方式, 在第四种可能的实现方式中, 该预设函数为散列函数或截短函数。
结合第二方面或结合第二方面的上述可能的实现方式,在第五种可能的 实现方式中, 该第二用户设备确定该第一用户设备的扰码参数的值, 包括: 该第二用户设备根据 D2D 同步信号, 确定该公共扰码参数的值; 或该第二 用户设备根据 D2D主同步信道 PD2DSCH, 确定该公共扰码参数的值; 或该 第二用户设备将该第二用户设备所属的 D2D簇的簇标识确定为该公共扰码 参数的值。
结合第二方面的第五种可能的实现方式, 在第六种可能的实现方式中, 该第二用户设备根据 D2D 同步信号, 确定该公共扰码参数的值, 包括: 该 第二用户设备将该 D2D同步信号的编号确定为该公共扰码参数的值。
结合第二方面的第五种可能的实现方式, 在第七种可能的实现方式中, 该 D2D同步信号包括 D2D主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS; 该第二用户设备根据 D2D 同步信号, 确定该公共扰码参数的值, 包括: 该 第二用户设备根据该 PD2DSS和该 SD2DSS, 确定该公共扰码参数的值。
结合第二方面的第七种可能的实现方式, 在第八种可能的实现方式中, 该公共扰码参数的值 Nc 由下式确定:
1 v DID — J A j v SD2DSS 1 v PD2DSS
其中, N SD2DSS为该 SD2DSS的编号, N P ss为该 PD2DSS的编号。 结合第二方面或结合第二方面的上述第一种至第四种可能的实现方式 中的任一种可能的实现方式, 在第九种可能的实现方式中, 该第二用户设备 确定该第一用户设备的扰码参数的值, 包括: 该第二用户设备接收基站或该 第二用户设备所属的 D2D簇的簇头发送的指示信息, 该指示信息用于指示 该第一用户设备的扰码参数的值; 该第二用户设备根据该指示信息, 确定该 扰码参数的值。
结合第二 2s
实现方式中, 该第二用户设备根据该扰码参数的值, 解扰接收到的该比特, 包括: 该第二用户设备根据该扰码参数的值, 确定扰码初始值; 该第二用户 设备根据该扰码初始值, 生成扰码序列, 并利用该扰码序列解扰接收到的该 比特。
结合第二方面的第十种可能的实现方式, 在第十一种可能的实现方式 中, 该第二用户设备根据该扰码参数的值, 确定扰码初始值, 包括: 该第二 用户设备将该公共扰码参数的值确定为该扰码初始值; 或该第二用户设备将 该特定扰码参数的值确定为该扰码初始值。
结合第二方面的第十种可能的实现方式, 在第十二种可能的实现方式 中, 该第二用户设备根据该扰码参数的值, 确定扰码初始值, 包括: 该第二 用户设备根据该扰码参数的值以及当前时隙编号, 确定该扰码初始值。
结合第二方面的第十二种可能的实现方式,在第十三种可能的实现方式 中 该 4 值 c 由下式确定: init + l)x (2x iV + l)x 29 + iV DID
Figure imgf000007_0001
X
Cinit 29 + N DID 其中, 《s为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 数的值。
结合第二方面的第十二种可能的实现方式,在第十四种可能的实现方式 , 该 4 值 c t由下式确定: init + , 或
Figure imgf000007_0002
其中, s为当前时隙编号, Λ^。 为公共扰码参数的值, 为特定扰 码参数的值。
结合第二方面或结合第二方面的上述任一种可能的实现方式,在第十五 种可能的实现方式中,该第二用户设备接收到的该比特包括至少两个比特片 段, 该至少两个比特片段中的每个比特片段包括数据比特片段和 CRC比特; 该第二用户设备利用该扰码序列解扰接收到的该比特, 包括: 该第二用户设 备将该扰码参数的值分成至少两个扰码片段; 该第二用户设备利用该至少两 个扰码片段解扰该至少两个比特片段的 CRC比特, 以获得至少两个待校验 比特片段。
结合第二方面的第十五种可能的实现方式,在第十六种可能的实现方式 中, 该方法还包括: 该第二用户设备对该至少两个待校验比特片段中的每个 待校验比特片段进行 CRC校验, 以获得该每个待校验比特片段的数据比特 片段; 该第二用户设备将该至少两个待校验比特片段的数据比特片段进行级 联, 以获得数据比特。
结合第二方面的第十六种可能的实现方式,在第十七种可能的实现方式 中, 该数据比特包括原始数据比特和 CRC比特; 该方法还包括: 该第二用 户设备对该数据比特进行 CRC校验, 以获得该原始数据比特。
第三方面, 提供了一种用户设备, 包括: 确定模块, 用于确定扰码参数 的值, 该扰码参数包括下列参数中的至少一种: 公共扰码参数和特定扰码参 数; 加扰模块, 用于根据该确定模块确定的该扰码参数的值, 加扰待发送比 特; 发送模块, 用于发送该加扰模块加扰后的待发送比特。
结合第三方面, 在第一种可能的实现方式中, 该扰码参数包括该公共扰 码参数; 该确定模块包括: 第一确定单元, 其中, 该第一确定单元用于根据 D2D同步信号,确定该公共扰码参数的值;或该第一确定单元用于根据 D2D 主同步信道 PD2DSCH, 确定该公共扰码参数的值; 或该第一确定单元用于 将该用户设备所属的 D2D簇的簇标识确定为该公共扰码参数的值。
结合第三方面的第一种可能的实现方式, 在第二种可能的实现方式中, 该第一确定单元具体用于将该 D2D 同步信号的编号确定为该公共扰码参数 的值。
结合第三方面的第一种可能的实现方式, 在第三种可能的实现方式中, 该 D2D同步信号包括 D2D主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS; 该第一确定单元具体用于根据该 PD2DSS和该 SD2DSS, 确定该公共扰码参 数的值。
结合第三方面的第三种可能的实现方式, 在第四种可能的实现方式中, 该公共扰码参数的值 Ν 由下式确定:
1 v DID — J A j v SD2DSS 1 v PD2DSS
其中, Ν SD2DSS为该 SD2DSS的编号, N PD2DSS为该 PD2DSS的编号。 结合第三方面或结合第三方面的上述可能的实现方式,在第五种可能的 实现方式中, 该扰码参数包括该特定扰码参数; 该确定模块包括: 第二确定 单元, 用于根据该用户设备的 D2D标识、 该用户设备的 D2D组标识和该用 户设备的业务类型标识中的至少一种标识, 确定该特定扰码参数的值。
结合第三方面的第五种可能的实现方式, 在第六种可能的实现方式中, 该第二确定单元具体用于: 将该用户设备的 D2D标识确定为该特定扰码参 数的值; 或将该用户设备的 D2D组标识确定为该特定扰码参数的值; 或将 该用户设备的业务类型标识确定为该特定扰码参数的值。
结合第三方面的第五种可能的实现方式, 在第七种可能的实现方式中, 该第二确定单元具体用于:根据该用户设备的 D2D标识、该用户设备的 D2D 组标识和该用户设备的业务类型标识中的至少一种标识以及散列函数,确定 该特定扰码参数的值; 或根据该用户设备的 D2D标识、 该用户设备的 D2D 组标识和该用户设备的业务类型标识中的至少一种标识和截短函数,确定该 特定扰码参数的值。
结合第三方面, 在第八种可能的实现方式中, 该确定模块包括: 接收单 元, 用于接收基站或该用户设备所属的 D2D簇的簇头发送的指示信息, 该 指示信息用于指示该扰码参数的值; 第三确定单元, 用于根据该接收单元接 收的该指示信息, 确定该扰码参数的值。
结合第三方面或结合第三方面的上述可能的实现方式,在第九种可能的 实现方式中, 该加扰模块包括: 确定单元, 用于根据该扰码参数的值, 确定 扰码初始值; 第一加扰单元, 用于根据该确定单元确定的该扰码初始值, 生 成扰码序列, 利用该扰码序列加扰该待发送比特。
结合第三方面的第九种可能的实现方式, 在第十种可能的实现方式中, 该确定单元具体用于: 将该公共扰码参数的值确定为该扰码初始值; 或将该 特定扰码参数的值确定为该扰码初始值。
结合第三方面的第九种可能的实现方式, 在第十一种可能的实现方式 中, 该确定单元具体用于: 根据该扰码参数的值以及当前时隙编号, 确定该 扰码初始值。 结合第三方面的第十一种可能的实现方式,在第十二种可能的实现方式 中, 具体用于根据下式确定该扰码初始值 C
+ 1) X (2 X ND2D + 1) χ 29 + ND2D , 或 29 + N DR ID
Figure imgf000010_0001
其中, 《s为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 参数的值。
结合第三方面的第十一种可能的实现方式,在第十三种可能的实现方式 中, 该 初始值 : init ' 或
Figure imgf000010_0002
其中, s为当前时隙编号, vmm为公共扰码参数的值, VJ^为特定扰 码参数的值。
结合第三方面或结合第三方面的上述第一种至第八种可能的实现方式 中的任一种可能的实现方式, 在第十四种可能的实现方式中, 该加扰模块包 括: 分段单元, 用于将该扰码参数的值分成至少两个扰码片段; 第二加扰单 元, 用于利用该分段单元分成的该至少两个扰码片段加扰该待发送比特。
结合第三方面的第十四种可能的实现方式,在第十五种可能的实现方式 中, 该第二加扰单元包括: 第一生成子单元, 用于生成该待发送比特的循环 冗余码校验 ( CRC ) 比特, 并将该待发送比特与该待发送比特的 CRC比特 作为待加扰比特; 第一分段子单元, 用于将该第一生成子单元生成的该待加 扰比特分成至少两个待加扰比特片段; 该第一生成子单元还用于生成该第一 分段子单元分成的该至少两个待加扰比特片段中的每个待加扰比特片段的 CRC比特; 第一加扰子单元,用于将该至少两个扰码片段分别加扰在该第一 生成子单元生成的该至少两个待加扰比特片段的 CRC比特上。
结合第三方面的第十四种可能的实现方式,在第十六种可能的实现方式 中, 该第二加扰单元包括: 第二分段子单元, 用于将该待发送比特分成至少 两个待发送比特片段; 第二生成子单元, 用于生成该第二分段子单元分成的 扰子单元, 用于将该至少两个扰码片段加扰在该第二生成子单元生成的该至 少两个待发送比特片段的 CRC比特上。
第四方面, 提供了另一种用户设备, 包括: 接收模块, 用于接收第一用 户设备发送的比特; 确定模块, 用于确定该第一用户设备的扰码参数的值, 该扰码参数包括下列参数中的至少一种: 公共扰码参数和特定扰码参数; 解 扰模块, 用于根据该确定模块确定的该扰码参数的值, 解扰该接收模块接收 到的该比特。
结合第四方面, 在第一种可能的实现方式中, 该公共扰码参数的值是该 第一用户设备根据 D2D 同步信号确定的; 或该公共扰码参数的值是该第一 用户设备根据 D2D主同步信道 PD2DSCH确定的; 或该公共扰码参数的值 为该第一用户设备所属的 D2D簇的簇标识。
结合第四方面或结合第四方面的第一种可能的实现方式,在第二种可能 的实现方式中, 该特定扰码参数的值是利用该第一用户设备的 D2D标识、 该第一用户设备的 D2D组标识和该第一用户设备的业务类型标识中的至少 一种标识经过预设函数运算后得到的。
结合第四方面的第二种可能的实现方式, 在第三种可能的实现方式中, 该特定扰码参数的值为该第一用户设备的 D2D标识; 或该特定扰码参数的 值为该第一用户设备的 D2D组标识; 或该特定扰码参数的值为该第一用户 设备的业务类型标识。
结合第四方面的第二种可能的实现方式, 在第四种可能的实现方式中, 该预设函数为散列函数或截短函数。
结合第四方面或结合第四方面的上述可能的实现方式,在第五种可能的 实现方式中, 该确定模块包括: 第一确定单元, 其中, 该第一确定单元用于 根据 D2D 同步信号, 确定该公共扰码参数的值; 或该第一确定单元用于根 据 D2D主同步信道 PD2DSCH, 确定该公共扰码参数的值; 或该第一确定单 元用于将该用户设备所属的 D2D簇的簇标识确定为该公共扰码参数的值。
结合第四方面的第五种可能的实现方式, 在第六种可能的实现方式中, 该第一确定单元具体用于将该 D2D 同步信号的编号确定为该公共扰码参数 的值。
结合第四方面的第五种可能的实现方式, 在第七种可能的实现方式中, 该 D2D同步信号包括 D2D主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS; 该第一确定单元具体用于根据该 PD2DSS和该 SD2DSS, 确定该公共扰码参 数的值。
结合第四方面的第七种可能的实现方式, 在第八种可能的实现方式中, 该公共扰码参数的值 Nc 由下式确定:
1 v DID — J A j v SD2DSS 1 v PD2DSS
其中, Ν SD2DSS为该 SD2DSS的编号, N PD2DSS为该 PD2DSS的编号。 结合第四方面或结合第四方面的上述第一种至第四种可能的实现方式 中的任一种可能的实现方式,在第九种可能的实现方式中,该确定模块包括: 接收单元, 用于接收基站或该用户设备所属的 D2D簇的簇头发送的指示信 息, 该指示信息用于指示该第一用户设备的扰码参数的值; 第二确定单元, 用于根据该接收单元接收的该指示信息, 确定该扰码参数的值。
结合第四方面或结合第四方面的上述可能的实现方式,在第十种可能的 实现方式中, 该解扰模块包括: 第三确定单元, 用于根据该扰码参数的值, 确定扰码初始值; 第一解扰单元, 用于根据该第三确定单元确定的该扰码初 始值, 生成扰码序列, 并利用该扰码序列解扰接收到的该比特。
结合第四方面的第十种可能的实现方式, 在第十一种可能的实现方式 中,该第三确定单元具体用于:将该公共扰码参数的值确定为该扰码初始值; 或将该特定扰码参数的值确定为该扰码初始值。
结合第四方面的第十种可能的实现方式, 在第十二种可能的实现方式 中, 该第三确定单元具体用于: 根据该扰码参数的值以及当前时隙编号, 确 定该扰码初始值。
结合第四方面的第十二种可能的实现方式,在第十三种可能的实现方式 中, 该第三确定单元具体用于根据下式确定该扰码初始值 ς i,nit
1) χ (2 χ ND2D + 1) x 29 + ND2D , 或
Cinit 29 + DID
Figure imgf000012_0001
其中, 为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 参数的值。
结合第四方面的第十二种可能的实现方式,在第十四种可能的实现方式 中, 该第三确定单元具体用于根据下式确定该扰码初始值 cimt: init + Ns"2 e D c , 或
Figure imgf000013_0001
其中, s为当前时隙编号, vmm为公共扰码参数的值, VJ^为特定扰 码参数的值。
结合第四方面或结合第四方面的上述任一种可能的实现方式,在第十五 种可能的实现方式中, 该接收模块接收到的该比特包括至少两个比特片段, 该至少两个比特片段中的每个比特片段包括数据比特片段和 CRC比特; 该 解扰模块包括: 分段单元, 用于将该扰码参数的值分成至少两个扰码片段; 第二解扰单元,用于利用该分段单元分成的该至少两个扰码片段分别解扰该 至少两个比特片段的 CRC比特, 以获得至少两个待校验比特片段。
结合第四方面的第十五种可能的实现方式,在第十六种可能的实现方式 中, 该用户设备还包括: CRC校验模块, 用于对该第二解扰单元获得的该至 每个待校验比特片段的数据比特片段; 级联模块, 用于将该 CRC校验模块 获得的该至少两个待校验比特片段的数据比特片段进行级联, 以获得数据比 特。
结合第四方面的第十六种可能的实现方式,在第十七种可能的实现方式 中, 该级联模块获得的该数据比特包括原始数据比特和 CRC比特; 该 CRC 校验模块还用于对该级联模块获得的该数据比特进行 CRC校验, 以获得该 原始数据比特。
基于上述技术方案, 本发明实施例提供的 D2D通信方法和用户设备, 发送端确定公共扰码参数和特定扰码参数中的至少一种扰码参数的值, 并根 据该扰码参数的值对待发送比特进行加扰, 能够在 D2D通信过程中实现对 传输信息的加扰;接收端确定公共扰码参数和特定扰码参数中的至少一种扰 码参数的值, 并根据该扰码参数的值对接收到的比特进行解扰, 能够在 D2D 通信过程中实现对传输信息的解扰, 从而提高 D2D通信方案的可行性并提 升用户体验。 附图说明 为了更清楚地说明本发明实施例的技术方案, 下面将对本发明实施例或 现有技术描述中所需要使用的附图作筒单地介绍, 显而易见地, 下面所描述 的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付 出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1是本发明实施例的 D2D通信方法的示意性流程图。
图 2是本发明实施例的 D2D通信方法的另一示意性流程图。
图 3是本发明实施例的 D2D通信方法的再一示意性流程图。
图 4是本发明实施例的 D2D通信方法中加扰待发送比特的示意图。 图 5是本发明实施例的 D2D通信方法中加扰待发送比特的另一示意图。 图 6是本发明另一实施例的 D2D通信方法的示意性流程图。
图 7是本发明实施例的用户设备的示意性框图。
图 8是本发明另一实施例的用户设备的示意性框图。
图 9是本发明再一实施例的用户设备的示意性框图。
图 10是本发明再一实施例的用户设备的示意性框图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例是本发明的一部分实施例, 而不 是全部实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创 造性劳动的前提下所获得的所有其他实施例, 都应属于本发明保护的范围。
应理解, 本发明的技术方案可以应用于各种通信系统, 例如: 全球移动 通讯(英文全称: Global System of Mobile communication, 英文缩写: GSM ) 系统、码分多址(英文全称: Code Division Multiple Access ,英文缩写: CDMA ) 系统、 宽带码分多址(英文全称: Wideband Code Division Multiple Access, 英文缩写: WCDMA ) 系统、 通用分组无线业务(英文全称: General Packet Radio Service, 英文缩写: GPRS )、 LTE系统、 先进的长期演进(英文全称: Advanced Long Term Evolution, 英文缩写: LTE-A ) 系统、 通用移动通信系 统(英文全称: Universal Mobile Telecommunication System,英文缩写: UMTS ) 等。
应理解, 在本发明实施例中, 用户设备(英文全称: User Equipment, 英文缩写: UE )包括但不限于移动台(英文全称: Mobile Station,英文缩写: MS )、移动终端(英文全称: Mobile Terminal )、移动电话(英文全称: Mobile Telephone ), 手机(英文全称: handset )及便携设备(英文全称: portable equipment ) 等, 该用户设备可以经无线接入网 (英文全称: Radio Access Network, 英文缩写: RAN ) 与一个或多个核心网进行通信, 例如, 用户设 备可以是移动电话(或称为 "蜂窝" 电话)、 具有无线通信功能的计算机等, 用户设备还可以是便携式、 袖珍式、 手持式、 计算机内置的或者车载的移动 装置。
本发明实施例中, 基站可以是 GSM或 CDMA 中的基站(英文全称: Base Transceiver Station, 英文缩写: BTS ), 也可以是 WCDMA 中的基站 ( NodeB ), 还可以是 LTE中的演进型基站(英文全称: evolved Node B , 英 文缩写: eNB或 e-NodeB ), 本发明实施例并不限定。
图 1示出了根据本发明实施例的 D2D通信方法 100的示意性流程图, 如图 1所示, 该方法 100包括:
S110, 第一用户设备确定扰码参数的值, 该扰码参数包括下列参数中的 至少一种: 公共扰码参数和特定扰码参数;
S120, 该第一用户设备根据该扰码参数的值, 对待发送比特进行加扰; S130, 该第一用户设备发送加扰后的该待发送比特。
因此, 根据本发明实施例的 D2D通信方法, 发送端确定公共扰码参数 和特定扰码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对待发 送比特进行加扰, 能够在 D2D通信过程中实现对传输信息的加扰, 从而提 高 D2D通信方案的可行性并提升用户体验。
在本发明实施例中,扰码参数包括公共扰码参数和 /或特定扰码参数(英 文全称: specific scrambling parameter ), 相应地, 该扰码参数的值可以包括 公共扰码参数的值和 /或特定扰码参数的值。其中,该公共扰码参数可以是多 个 UE共用的扰码参数, 能够反映该多个用户设备的共有特性, 例如, 一个 D2D簇内的所有 UE共用的扰码参数; 该特定扰码参数可以为 UE专用的扰 码参数, 能够反映用户设备的专有特性, 例如, 特定扰码参数为 UE的标识, 从而使得接收端能够根据该特定扰码参数区分该用户设备与其它用户设备, 但本发明实施例不限于此。
以该第一用户设备发送发现信号为例,在某些场景下,比如广告场景下, 该第一用户设备需要尽可能多的其他用户设备能够发现自己, 因此, 该第一 用户设备可以通过公共扰码参数加扰发现信号, 而接收到该发现信号的用户 设备使用该公共扰码参数就可以解扰该发现信号。 而在另外一些场景下, 比 如第一用户设备仅仅想被自己熟悉的用户设备(例如, 属于该第一用户设备 的好友群组的用户设备)发现, 则可以通过这个好友群组特定的扰码参数加 扰并发送发现信号,接收到该发现信号的用户设备只有通过这个好友群组特 定的扰码参数才能解扰发现信号; 不在这个好友群组的用户设备由于不知道 这个群组的特定扰码参数, 因此不能够解扰第一用户设备发送的该发现信 号, 因此不在这个好友群组的用户设备无法发现该第一用户设备。
在 S110 中, 该第一用户设备确定扰码参数的值包括: 该第一用户设备 确定公共扰码参数的值和 /或特定扰码参数的值,其中,该第一用户设备可以 通过多种方式确定该公共扰码参数的值和 /或该特定扰码参数的值,但本发明 实施例不限于此。
在本发明实施例中, 该待发送比特可以具体为一个或多个比特, 且该待 发送比特可以承载发现信号或待发送数据,本发明实施例不限于此。可选地, 在 S120中, 该第一用户设备可以进行数据信道加扰, 具体地, 该第一用户 设备可以根据该扰码参数的值生成扰码序列, 并利用该扰码序列对该待发送 比特进行加扰。 可选地, 作为另一实施例, 在 S120中, 该第一用户设备也 可以进行 CRC加扰, 具体地, 该第一用户设备可以将该扰码参数的值或将 该扰码参数的值进行处理后获得的数值作为扰码序列加扰在该待发送比特 的 CRC比特上, 但本发明实施例不限于此。
当本发明实施例中的待发送比特承载发现信号时,本发明实施例可以应 用于开放发现场景和受控发现场景, 其中, 在开放发现场景下, 该扰码参数 可以仅包括公共扰码参数, 并根据该公共扰码参数的值对发现信号进行加 扰,以使得较多的邻近 UE能够对该第一用户设备发送的发现信号进行解扰。 在受控发现场景下, 该扰码参数可以仅包括特定扰码参数或包括特定扰码参 数和公共扰码参数, 并根据该特定扰码参数的值或根据该特定扰码参数的值 以及该公共扰码参数的值对发现信号进行加扰, 以使得只有与该第一用户设 备具有进一步关联关系的邻近用户设备才能对该第一用户设备发送的发现 信号进行解扰。与该第一用户设备具有进一步关联关系的邻近用户设备能够 获知该第一用户设备的特定扰码参数的值, 该关联关系可以依赖于该第一用 户设备发送该发现信号的目的, 即该第一用户设备想要让哪些邻近用户设备 解扰该发现信号,例如,与该第一用户设备属于同一用户组的邻近用户设备, 或与该第一用户设备属于同一业务类型的邻近用户设备, 等等, 本发明实施 例对此不做限定。
在本发明实施例中, 如果该扰码参数包括公共扰码参数, 该第一用户设 备确定扰码参数的值可以包括该第一用户设备确定公共扰码参数的值, 可选 地, 步骤 S110可以具体通过以下方式实现:
方式一, 该第一用户设备根据 D2D 同步信号, 确定该公共扰码参数的 值; 或
方式二, 该第一用户设备根据 D2D主同步信道 PD2DSCH, 确定该公共 扰码参数的值;
方式三, 该第一用户设备将该第一用户设备所属的 D2D簇的簇标识确 定为该公共扰码参数的值。
具体地,在方式一中,该第一用户设备可以检测 D2D同步信号,该 D2D 同步信号可以是该第一用户设备所属的 D2D簇的簇头发送的, 也可以是基 站发送的, 本发明实施例对此不做限定。 当该第一用户设备检测到该 D2D 同步信号时, 从该 D2D 同步信号中获取该公共扰码参数的值, 可选地, 该 第一用户设备可以将检测到的该 D2D 同步信号的编号作为该公共扰码参数 的值, 相应地, 该方式一可以具体为: 该第一用户设备将该 D2D 同步信号 的编号确定为该公共扰码参数的值。
可选地, 作为另一实施例, 该 D2D同步信号可以包括 D2D主同步信号
(英文全称: Primary Device to Device Synchronization Signal, 英文缩写: PD2DSS ) 和 D2D 辅同步信号 (英文全称: Secondary Device to Device Synchronization Signal, 英文缩写: SD2DSS ); 相应地, 该方式一可以具体 为: 该第一用户设备根据该 PD2DSS和该 SD2DSS , 确定该公共扰码参数的 值。
其中, 该第一用户设备可以分别检测该 PD2DSS和该 SD2DSS , 并且根 据检测到的该 PD2DSS和该 SD2DSS确定该公共扰码参数的值。可选地, 该 第一用户设备可以根据下式确定该公共扰码参数的值 :
L D2D ~ J ^ L SD2DSS ^ L PD2DSS Y 丄 ) 其中, N sss为该 SD2DSS的编号, N P。2DSS为该 PD2DSS的编号。 可选地, 该第一用户设备还可以通过其它公式确定该公共扰码参数的值, 本 发明实施例对此不做限定。
在方式二中,该第一用户设备可以在 D2D同步信道(英文全称: Primary Device to Device Synchronization Channel, 英文缩写: PD2DSCH ) 的特定时 频资源上获取该公共扰码参数的值, 本发明实施例对此不做限定。
在方式三中, 该第一用户设备可以将自身所属的 D2D簇的簇标识作为 该公共扰码参数的值, 但本发明实施例不限于此。
可选地, 作为另一实施例, 如果该扰码参数包括该特定扰码参数, 则该 第一用户设备确定该扰码参数的值可以包括该第一用户设备确定特定扰码 参数的值, 其中, 该第一用户设备可以通过多种方式确定自身的特定扰码参 数,作为一个优选实施例, 该第一用户设备可以根据该第一用户设备的 D2D 标识、 该第一用户设备的 D2D组标识和该第一用户设备的业务类型标识中 的至少一种标识, 确定自身的特定扰码参数的值, 相应地, 步骤 S110还可 以通过以下方式实现:
方式四, 该第一用户设备根据该第一用户设备的 D2D标识、 该第一用 户设备的 D2D组标识和该第一用户设备的业务类型标识中的至少一种标识, 确定该特定扰码参数的值。
可选地, 方式四可以具体通过下列几种途径实现:
途径一, 该第一用户设备将该第一用户设备的 D2D标识、 或该第一用 户设备的 D2D组标识或该第一用户设备的业务类型标识作为该特定扰码参 数的值;
其中, 该第一用户设备的 D2D组标识可以为该第一用户设备的 D2D用 户组标识, 但本发明实施例不限于此。
途径二, 该第一用户设备对该第一用户设备的 D2D标识、 该第一用户 设备的 D2D组标识和该第一用户设备的业务类型标识中的至少一种标识按 照某种运算规则进行运算, 并将该运算得到的数值作为该特定扰码参数的 值。
其中, 该运算规则可以采用函数表示, 例如, 散列函数或截短函数, 等 等, 其中, 如果该函数为截短函数, 该截短函数用于将标识截短, 具体地, 该截短函数可以从前端向后截短标识、 从后端向前截短、 或从中间部分开始 截短, 本发明实施例对此不做限定。
需要说明的是: 本文中所涉及的散列函数(英文全称: Hash Function ) 又称为哈希函数。
优选地, 该途径二可以具体为: 该第一用户设备将该第一用户设备的
D2D标识、 该第一用户设备的 D2D组标识或该第一用户设备的业务类型标 识作为输出值代入散列函数, 并将该散列函数的输出值作为该特定扰码参数 的值; 或者该第一用户设备将该第一用户设备的 D2D标识、 该第一用户设 备的 D2D组标识或该第一用户设备的业务类型标识作为输入值代入截短函 数, 并将该截短函数的输出值作为该特定扰码参数的值, 但本发明实施例不 限于此。
可选地, 作为另一实施例, 如果该第一用户设备所属的 D2D簇由基站 进行集中式控制, 则该第一用户设备也可以根据该基站发送的指示信息确定 自身的特定扰码参数和 /或公共扰码参数的值。而如果该第一用户设备所属的 D2D簇由簇头进行分布式控制,则该第一用户设备还可以根据该簇头发送的 指示信息确定自身的特定扰码参数和 /或公共扰码参数的值。 相应地, 步骤 S 110还可以通过第五种方式实现, 方式五包括如下的两个步骤:
步骤一, 该第一用户设备接收基站或该第一用户设备所属的 D2D簇的 簇头发送的指示信息, 该指示信息用于指示该扰码参数的值;
步骤二, 该第一用户设备根据该指示信息, 确定该扰码参数的值。 具体地, 该指示信息可以为物理层信令或高层信令, 例如, 该指示信息 为发现信号寻呼信令或无线资源管理(英文全称: Radio Resource Control, 英 文缩写: RRC )专有信令, 等等。 该指示信息可以显性或隐性地指示该扰码 参数的值,其中,该扰码参数的值可以具体为公共扰码参数的值和 /或特定扰 码参数的值,例如,该指示信息可以包括该特定扰码参数的值和 /或该公共扰 码参数的值;或者该指示信息包括与该特定扰码参数和 /或公共扰码参数的值 的相关信息,该第一用户设备根据该相关信息确定该特定扰码参数和 /或公共 扰码参数的值, 但本发明实施例不限于此。
在本发明实施例中,该第一用户设备可以对该待发送比特进行数据信道 加扰, 相应地, 如图 2所示, S120, 第一用户设备根据该扰码参数的值, 对 待发送比特进行加扰, 包括:
S121 , 该第一用户设备根据该扰码参数的值, 确定扰码初始值; S122, 该第一用户设备根据该扰码初始值, 生成扰码序列, 利用该扰码 序列加 4尤该待发送比特。 具体地, 在 S122中, 该第一用户设备可以生成该待发送比特的 CRC比 特, 并将该待发送比特和该 CRC比特作为实际发送比特; 然后, 该第一用 户设备可以将该扰码序列加扰在该实际发送比特上,但本发明实施例不限于 此。
在本发明实施例中,该第一用户设备可以通过多种方式确定该扰码初始 值, 优选地, 步骤 S121可以通过以下实现方式实现:
实现方式一, 如果该扰码参数包括该公共扰码参数, 该第一用户设备将 该公共扰码参数的值确定为该扰码初始值;
实现方式二, 如果该扰码参数包括该特定扰码参数, 该第一用户设备将 该特定扰码参数的值确定为该扰码初始值;
实现方式三, 该第一用户设备根据该扰码参数的值以及当前时隙编号, 确定该 4尤码初始值。
其中, 在实现方式三中, 该扰码参数的值可以具体为该公共扰码参数的 值和 /或该特定扰码参数的值。该当前时隙编号可以为该第一用户设备发送该 加扰后的待发送比特所占用的时隙的编号, 可选地, 该当前时隙编号可以为 该第一用户设备占用的该时隙在一个无线帧中的编号, 其值可以为 0至 19 中的任意数值, 但本发明实施例不限于此。 可选地, 在实现方式三中, 该扰 码初始值 cinit可 确定:
2 Νη2η + 1) 29 + N DID ( 2 )
X 29 + N DID ( 3 )
Figure imgf000020_0001
其中, 《s为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 参数的值。
可选地, 作为另一实施例, 在实现方式三中, 该扰码初始值 可以由 下式确定:
imt = ND s D x 2M +
Figure imgf000020_0002
其中, 为当前时隙编号, Λ^ 为公共扰码参数的值, V D^2D为特定扰 码参数的值。
可选地, 在实现方式三中, 该扰码初始值还可以通过其它公式确定, 本 发明实施例不限于此。
可选地, 作为另一实施例, 该第一用户设备还可以对该待发送比特进行 CRC加扰,即该第一用户设备利用用该扰码参数的值对根据该待发送比特生 成的 CRC比特进行加扰。 可选地, 在某些特定情况下, 例如, 该扰码参数 的值所对应的比特数超过需要进行加扰的 CRC比特的位数, 即该扰码参数 的值对应的比特数目大于 24,该第一用户设备可以将该扰码参数的值分成至 少两个扰码片段, 并采用该至少两个扰码片段对该待发送比特进行加扰, 其 中, 该至少两个扰码片段的个数可以根据实际需求确定, 例如, 该至少两个 扰码片段的个数可以依赖于该扰码参数的值所对应的比特位数和 CRC比特 的位数, 以使得每个扰码片段所对应的比特位数小于或等于 CRC比特的位 数, 但本发明实施例不限于此。
可选地, 如图 3所示, S120, 第一用户设备根据该扰码参数的值, 对待 发送比特进行加扰, 包括:
5123 , 该第一用户设备将该扰码参数的值分成至少两个扰码片段;
5124, 该第一用户设备利用该至少两个扰码片段加扰该待发送比特。 可选地, 在 S124中, 该第一用户设备可以为该待发送比特生成至少两 个 CRC 比特, 并将该至少两个扰码片段加扰在根据该待发送比特生成的 CRC比特上, 但本发明实施例不限于此。
可选地, S124, 该第一用户设备利用该至少两个扰码片段加扰该待发送 比特, 包括:
S1241a, 该第一用户设备将该待发送比特分成至少两个待发送比特片 段;
S1242a,该第一用户设备生成该至少两个待发送比特片段中的每个待发 送比特片段的循环冗余码校验(CRC ) 比特;
S1243a,该第一用户设备将该至少两个扰码片段分别加扰在该至少两个 待发送比特片段的 CRC比特上。
具体地,该第一用户设备可以为该至少两个待发送比特片段中的每个待 发送比特片段生成 CRC比特, 并将生成的该 CRC比特置于对应的待发送比 特片段之后, 作为实际发送比特片段。 可选地, 该待发送比特片段的数目可 以等于该扰码片段的数目, 并且该第一用户设备可以将该至少两个扰码片段
——对应地加扰在该至少两个待发送比特片段的 CRC比特上; 可选地, 该 待发送比特片段的数目也可以大于该扰码片段的数目, 此时, 该第一用户设 备可以将该至少两个扰码片段加扰在该至少两个待发送比特片段中的部分 待发送比特片段的 CRC比特上, 而对另一部分待发送比特片段的 CRC比特 不进行加扰, 或采用以固定数值填充的片段对另一部分待发送比特片段的 CRC比特进行加扰,或重复采用该至少两个扰码片段中的至少一个扰码片段 对另一部分待发送比特片段的 CRC比特进行加扰, 但本发明实施例不限于 此。
图 4示出了根据本发明实施例的该第一用户设备进行 CRC加扰的示意 图, 如图 4所示, 该第一用户设备将该扰码参数的值对应的比特(即扰码比 特)分成两个扰码片段, 扰码片段 1和扰码片段 2, 相应地, 该第一用户设 备将该待发送比特分成两个待发送比特片段,待发送比特片段 1和待发送比 特片段 2, 并且该第一用户设备分别为该待发送比特片段 1和该待发送比特 片段 2生成 CRC比特, 然后, 该第一用户设备将扰码片段 1加扰在该待发 送比特片段 1的 CRC比特上, 并将扰码片段 2加扰在该待发送比特片段 2 的 CRC比特上。
可选地, 作为另一实施例, S124, 该第一用户设备利用该至少两个扰码 片段加扰该待发送比特, 包括:
S1241b, 该第一用户设备生成该待发送比特的 CRC比特, 并将该待发 送比特与该待发送比特的 CRC比特作为待加扰比特;
S1242b, 该第一用户设备将该待加扰比特分成至少两个待加扰比特片 段;
S1243b,该第一用户设备生成该至少两个待加扰比特片段中的每个待加 扰比特片段的 CRC比特;
S1244b,该第一用户设备将该至少两个扰码片段分别加扰在该至少两个 待加扰比特片段的 CRC比特上。
具体地, 该第一用户设备可以将该待发送比特的 CRC置于该待发送比 特之后, 此时, 该待发送比特和该 CRC比特共同组成待加扰比特; 然后, 该第一用户设备将该待加扰比特分成至少两个待加扰比特片段; 该第一用户 设备可以为该至少两个待加扰比特片段中的每个待加扰比特片段生成 CRC 比特, 并将生成的该 CRC比特置于对应的待加扰比特片段之后, 作为实际 发送比特片段。 可选地, 该待加扰比特片段的数目可以等于该扰码片段的数 目, 并且该第一用户设备可以将该至少两个扰码片段——对应地加扰在该至 少两个待加扰比特片段的 CRC比特上; 可选地, 该待加扰比特片段的数目 也可以大于该扰码片段的数目, 此时, 该第一用户设备可以将该至少两个扰 码片段加扰在该至少两个待加扰比特片段中的部分待加扰比特片段的 CRC 比特上, 而对另一部分待加扰比特片段的 CRC比特不进行加扰, 或采用以 固定数值填充的片段对另一部分待加扰比特片段的 CRC比特进行加扰, 或 重复采用该至少两个扰码片段中的至少一个扰码片段对另一部分待加扰比 特片段的 CRC比特进行加扰, 但本发明实施例不限于此。
图 5示出了根据本发明另一实施例的第一用户设备进行 CRC加扰的示 意图, 如图 5所示, 该第一用户设备将该扰码参数的值对应的比特(即扰码 比特)分成两个扰码片段, 扰码片段 1和扰码片段 2; 另一方面, 该第一用 户设备生成该待发送比特的 CRC比特, 并将该 CRC比特置于该待发送比特 之后构成待加扰比特, 然后该第一用户设备将该待加扰比特分成两个待加扰 比特片段, 待加扰比特片段 1和待加扰比特片段 2, 并且该第一用户设备分 别为该待加扰比特片段 1和该待加扰比特片段 2生成 CRC比特, 然后, 该 第一用户设备将扰码片段 1加扰在该待加扰比特片段 1的 CRC比特上, 并 将扰码片段 2加扰在该待加扰比特片段 2的 CRC比特上。
图 4和图 5以该扰码片段的个数为 2进行了阐述, 可选地, 在本发明实 施例中, 该扰码片段的个数也可以为其它数值, 且需要进行加扰的 CRC比 特的个数与该扰码片段的个数可以具有相同或不同的数值, 本发明实施例对 此不作限定。
应理解, 图 4和图 5所示的例子是为了帮助本领域技术人员更好地理解 本发明实施例, 而非要限制本发明实施例的范围。 本领域技术人员根据所给 出的图 4和图 5的例子, 显然可以进行各种等价的修改或变化, 这样的修改 或变化也落入本发明实施例的范围内。
因此, 根据本发明实施例的 D2D通信方法, 发送端确定公共扰码参数 和特定扰码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对待发 送比特进行加扰, 能够在 D2D通信过程中实现对传输信息的加扰, 从而提 高 D2D通信方案的可行性并提升用户体验。 上文中结合图 1至图 5 , 从发送端的角度详细描述了根据本发明实施例 的 D2D通信方法, 下面将结合图 6,从接收端的角度详细描述根据本发明实 施例的 D2D通信方法。
图 6示出了根据本发明另一实施例的 D2D通信方法 200的示意性流程 图, 如图 6所示, 该方法 200包括:
S210, 第二用户设备接收第一用户设备发送的比特;
S220, 该第二用户设备确定该第一用户设备的扰码参数的值, 该扰码参 数包括下列参数中的至少一种: 公共扰码参数和特定扰码参数;
S230, 该第二用户设备根据该扰码参数的值, 解扰接收到的该比特。 因此, 根据本发明实施例的 D2D通信方法, 接收端确定公共扰码参数 和特定扰码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对接收 到的比特进行解扰, 能够在 D2D通信过程中实现对传输信息的解扰, 从而 提高 D2D通信方案的可行性并提升用户体验。
如果该扰码参数包括该公共扰码参数, 可选地, 该公共扰码参数的值是 该第一用户设备根据 D2D同步信号确定的; 或
该公共扰码参数的值是该第一用户设备根据 D2D主同步信道 PD2DSCH 确定的; 或
该公共扰码参数的值为该第一用户设备所属的 D2D簇的簇标识。
可选地, 作为另一实施例, 如果该扰码参数包括特定扰码参数, 该特定 扰码参数的值是利用该第一用户设备的 D2D标识、 该第一用户设备的 D2D 组标识和该第一用户设备的业务类型标识中的至少一种标识经过函数运算 后得到的。
可选地, 该函数可以为 f(x) = x, 即函数的输出值等于该函数的输入值, 相应地, 该特定扰码参数的值为该第一用户设备的 D2D标识; 或
该特定扰码参数的值为该第一用户设备的 D2D组标识; 或
该特定扰码参数的值为该第一用户设备的业务类型标识。
可选地, 作为另一实施例, 该函数为散列函数或截短函数。
在本发明实施例中, 该第二用户设备可以与该第一用户设备属于相同的 D2D簇, 此时, 该第二用户设备可以通过多种方式获取该第一用户设备的扰 码参数的值。 可选地, 该第二用户设备可以通过控制设备发送的指示信息确 定该第一用户设备的扰码参数的值, 具体地, 如果该 D2D簇由基站集中式 控制, 则该第二用户设备可以通过该基站的指示信息获取该扰码参数的值; 而如果该 D2D簇由簇头分布式控制, 则该第二用户设备可以从该 D2D簇的 簇头发送的指示信息中获取该扰码参数的值, 但本发明实施例不限于此。
可选地, 作为实施例, 在某些特定场景下, 例如, 该第二用户设备与该 第一用户设备属于相同的 D2D簇, 也可以预先设置该 D2D簇内的各个用户 设备在进行加扰和解扰时确定扰码参数的值的方式, 这样, 该第二用户设备 可以通过与该第一用户设备相同的方式确定该扰码参数的值, 例如, 如果该 第一用户设备在进行加扰时根据 D2D 同步信号确定公共扰码参数的值, 则 该第二用户设备在解扰时也根据 D2D 同步信号确定该公共扰码参数的值, 等等。 可选地, 如果该扰码参数包括公共扰码参数, 步骤 S220可以具体通 过下列方式实现:
方式一: 该第二用户设备根据 D2D 同步信号, 确定该公共扰码参数的 值; 或
方式二: 该第二用户设备根据 D2D主同步信道 PD2DSCH, 确定该公共 扰码参数的值;
方式三: 该第二用户设备将该第二用户设备所属的 D2D簇的簇标识确 定为该公共扰码参数的值。
可选地, 该方式一可以具体为: 该第二用户设备将该 D2D 同步信号的 编号确定为该公共扰码参数的值。
可选地, 作为另一实施例, 该 D2D同步信号可以包括 D2D主同步信号
PD2DSS和 D2D辅同步信号 SD2DSS, 相应地, 该方式一也可以具体为: 该 第二用户设备根据该 PD2DSS和该 SD2DSS, 确定该公共扰码参数的值。
作为一个优选实施例 , 该公共扰码参数的值 由下式确定:
1 D2D — J χ 1 SD2DSS ^ 1 PD2DSS 0 ' 其中, N SD2DSS为该 SD2DSS的编号, N P ss为该 PD2DSS的编号。 可选地, 作为另一实施例, 该第二用户设备所属的 D2D簇也可以不同 于该第一用户设备所属的 D2D簇, 此时, 如果为该第一用户设备与该第二 用户设备提供服务的基站相同, 该第二用户设备可以通过基站发送的指示信 息确定该扰码参数的值, 但本发明实施例不限于此。
可选地, 作为另一实施例, S220, 该第二用户设备确定该第一用户设备 的扰码参数的值, 包括: 5221 , 该第二用户设备接收基站或所述第二用户设备所属的 D2D簇的 簇头发送的指示信息, 该指示信息用于指示该第一用户设备的扰码参数的 值;
5222, 该第二用户设备根据该指示信息, 确定该扰码参数的值。
其中, 该指示信息可以显性或隐性地指示该 4尤码参数的值, 该第二用户 设备可以根据该指示信息, 确定该扰码参数的值, 其中, 该扰码参数的值可 以具体为公共扰码参数的值和 /或特定扰码参数的值,但本发明实施例不限于 此。
可选地, 作为另一实施例, 该第一用户设备在加扰待发送比特时可以采 用数据信道加扰或 CRC力口扰, 该第二用户设备在对接收到的比特进行解扰 时也可以相应地采用数据信道解扰或 CRC解扰。 如果该第二用户设备对接 收到的比特采用数据信道解扰, 可选地, S230, 第二用户设备根据该扰码参 数的值, 解扰接收到的该比特, 包括:
S231 , 该第二用户设备根据该扰码参数的值, 确定扰码初始值; S232, 该第二用户设备根据该扰码初始值, 生成扰码序列, 并利用该扰 码序列解 4尤接收到的该比特。
可选地, 步骤 S231可以通过以下实现方式实现:
实现方式一, 该第二用户设备将该公共扰码参数的值确定为该扰码初始 值;
实现方式二, 该第二用户设备将该特定扰码参数的值确定为该扰码初始 值;
实现方式三, 该第二用户设备根据该扰码参数的值以及当前时隙编号, 确定该 4尤码初始值。
其中, 在实现方式三中, 该扰码参数的值可以具体为该公共扰码参数的 值和 /或该特定扰码参数的值,该当前时隙编号可以是该第二用户设备接收该 比特所占用的时隙的编号, 其中, 该第二用户设备接收该比特的时隙与该第 一用户设备发送该比特的时隙相同, 但本发明实施例不限于此。 可选地, 在 实现方式三中, 该 4尤码初始值 c,mt可以由下式确定:
Cinit + 1) X (2 X Νη2η +1) χ 29 + Νη2η ( 7 ) 或 Cinit x 29 + N DID ( 8 )
Figure imgf000027_0001
其中, 为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 参数的值。
可选地, 作为另一实施例, 在实现方式三中, 该扰码初始值 可以由 下式确定:
Figure imgf000027_0002
其中, 《s为当前时隙编号, Λ^。 为公共扰码参数的值, 为特定扰 码参数的值。
可选地, 在实现方式三中, 该扰码初始值还可以通过其它公式确定, 本 发明实施例不限于此。
可选地, 作为另一实施例, 该第二用户设备也可以对接收到的比特采用 CRC解扰, 可选地, 在某些特定情况下, 例如, 该扰码参数的值所对应的比 特数超过需要进行解扰的 CRC比特的位数, 即该扰码参数的值对应的比特 数目大于 24, 该第一用户设备将该扰码参数的值分成多个扰码片段进行加 扰, 相应地, 该第二用户设备也可以将该扰码参数的值分成多个扰码片段, 并采用该多个扰码片段对该接收到的比特进行解扰。
可选地, 该第二用户设备接收到的该比特包括至少两个待解扰比特片 段, 该至少两个待解扰比特片段中的每个待解扰比特片段包括数据比特片段 和 CRC比特;
相应地, S230, 第二用户设备利用该扰码序列解扰接收到的该比特, 包 括:
S233 , 该第二用户设备将该扰码参数的值分成至少两个扰码片段; S234,该第二用户设备采用该至少两个扰码片段分别解扰该至少两个待 解扰比特片段的 CRC比特, 以获得至少两个待校验比特片段。
如果该第一用户设备采用如图 4或图 6所示的方式进行加扰, 则该第二 用户设备可以将该扰码参数的值分成两个扰码片段,扰码片段 1和扰码片段 2,并且相应地将接收到的比特分成两个比特片段,比特片段 1和比特片段 2; 然后, 该第二用户设备可以将利用扰码片段 1解扰比特片段 1 , 以获得待校 验比特片段 1 ,并利用扰码片段 2解扰比特片段 2,以获得待校验比特片段 2, 参照图 4可以得知, 该待校验比特片段 1对应于待发送比特片段 1与该待发 送比特片段 1的 CRC比特, 而待校验比特片段 2对应于待发送比特片段 2 与该待发送比特片段 2的 CRC比特, 其中, 待发送比特片段即为数据比特 片段。 而参照图 6可以得知, 该待校验比特片段 1对应于待加扰比特片段 1 与该待发送比特片段 1的 CRC比特, 而待校验比特片段 2对应于待加扰比 特片段 2与该待发送比特片段 2的 CRC比特, 但本发明实施例不限于此。
可选地, 作为另一实施例, 该方法 200还包括:
S240,该第二用户设备对该至少两个待校验比特片段中的每个待校验比 特片段进行 CRC校验, 以获得该每个待校验比特片段的数据比特片段;
S250,该第二用户设备将该至少两个待校验比特片段的数据比特片段进 行级联, 以获得数据比特。
具体地, 如果该第一用户设备采用如图 4所示的方式进行加扰, 则该第 二用户设备可以分别对该待校验比特片段 1和该待校验比特片段 2进行 CRC 校验, 以获得待发送比特片段 1和待发送比特片段 2, 然后该第二用户设备 将该待发送比特片段 1和该待发送比特片段 2进行级联可以获得该第一用户 设备的待发送比特, 该待发送数据即为该数据比特, 此时, 该数据比特即为 该第一用户设备的原始数据比特。
可选地, 作为另一实施例, 如果该第一用户设备采用如图 6所示的方式 进行加扰, 则该第二用户设备可以分别对该待校验比特片段 1和该待校验比 特片段 2进行 CRC校验, 以获得待加扰比特片段 1和待加扰比特片段 2, 然 后该第二用户设备将该待加扰比特片段 1和待加扰比特片段 2进行级联可以 获得该第一用户设备的待加扰比特, 其中, 该待加扰比特包括待发送比特和 CRC 比特, 该待发送比特即为数据比特, 则该第二用户设备需要再次进行 CRC校验, 以获得该第一用户设备的待发送比特, 即原始数据比特。
可选地, 作为另一实施例, 该数据比特包括原始数据比特和 CRC比特; 相应地, 该方法 200还包括:
S260, 该第二用户设备对该数据比特进行 CRC校验, 以获得该原始数 据比特。
因此, 根据本发明实施例的 D2D通信方法, 接收端确定公共扰码参数 和特定扰码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对接收 到的比特进行解扰, 能够在 D2D通信过程中实现对传输信息的解扰, 从而 提高 D2D通信方案的可行性并提升用户体验。
应理解, 上述各过程的序号的大小并不意味着执行顺序的先后, 各过程 的执行顺序应以其功能和内在逻辑确定, 而不应对本发明实施例的实施过程 构成任何限定。
上文中结合图 1至图 6,详细描述了根据本发明实施例的 D2D通信方法, 下面将结合图 7至图 10, 描述根据本发明实施例的用户设备。
图 7示出了根据本发明实施例的用户设备 300的示意性框图。如图 7所 示, 该用户设备 300包括:
确定模块 310, 用于确定扰码参数的值, 该扰码参数包括下列参数中的 至少一种: 公共扰码参数和特定扰码参数;
加扰模块 320, 用于根据该确定模块 310确定的该扰码参数的值, 加扰 待发送比特;
发送模块 330, 用于发送该加扰模块 320加扰后的待发送比特。
因此, 根据本发明实施例的用户设备, 通过确定公共扰码参数和特定扰 码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对待发送比特进 行加扰, 能够在 D2D通信过程中实现对传输信息的加扰, 从而提高 D2D通 信方案的可行性并提升用户体验。
可选地, 该扰码参数包括该公共扰码参数; 相应地, 该确定模块 310包 括: 第一确定单元 311 , 其中,
该第一确定单元 311根据 D2D同步信号, 确定该公共扰码参数的值; 或
该第一确定单元 311用于根据 D2D主同步信道 PD2DSCH,确定该公共 扰码参数的值; 或
该第一确定单元 311用于将该用户设备 300所属的 D2D簇的簇标识确 定为该公共扰码参数的值。
可选地, 作为另一实施例, 该第一确定单元 311具体用于将该 D2D同 步信号的编号确定为该公共扰码参数的值。
可选地, 作为另一实施例, 该 D2D 同步信号包括 D2D 主同步信号
PD2DSS和 D2D辅同步信号 SD2DSS; 相应地, 该第一确定单元 311具体用于根据该 PD2DSS和该 SD2DSS, 确定该公共扰码参数的值。
可选地, 作为另一实施例, 该公共扰码参数的值 Λ^2" 由下式确定:
Figure imgf000030_0001
) 其中, N sss为该 SD2DSS的编号, N PD2DSS为该 PD2DSS的编号。 可选地, 作为另一实施例, 该扰码参数包括该特定扰码参数; 相应地, 该确定模块 310包括:
第二确定单元 312,用于根据该用户设备 300的 D2D标识、该用户设备 300的 D2D组标识和该用户设备 300的业务类型标识中的至少一种标识,确 定该特定扰码参数的值。
可选地, 作为另一实施例, 该第二确定单元 312具体用于:
将该用户设备 300的 D2D标识确定为该特定扰码参数的值; 或 将该用户设备 300的 D2D组标识确定为该特定扰码参数的值; 或 将该用户设备 300的业务类型标识确定为该特定扰码参数的值。
可选地, 作为另一实施例, 该第二确定单元 312具体用于:
根据该用户设备 300的 D2D标识、 该用户设备 300的 D2D组标识和该 用户设备 300的业务类型标识中的至少一种标识以及散列函数,确定该特定 扰码参数的值; 或
根据该用户设备 300的 D2D标识、 该用户设备 300的 D2D组标识和该 用户设备 300的业务类型标识中的至少一种标识和截短函数,确定该特定扰 码参数的值。
可选地, 作为另一实施例, 该确定模块 310包括:
接收单元 313,用于接收基站或该用户设备 300所属的 D2D簇的簇头发 送的指示信息, 该指示信息用于指示该 4尤码参数的值;
第三确定单元 314, 用于根据该接收单元 313接收的该指示信息, 确定 该扰码参数的值。
其中,可选地,该扰码参数的值可以具体为公共扰码参数的值和 /或特定 扰码参数的值。
可选地, 作为另一实施例, 该加扰模块 320包括:
确定单元 321 , 用于根据该确定模块 310确定的该扰码参数的值, 确定 扰码初始值; 第一加扰单元 322, 用于根据该确定单元 321确定的该扰码初始值, 生 成扰码序列, 利用该扰码序列加扰该待发送比特。
可选地, 作为另一实施例, 该确定单元 321具体用于:
将该公共扰码参数的值确定为该扰码初始值; 或
将该特定扰码参数的值确定为该扰码初始值。
可选地,作为另一实施例,该确定单元 321具体用于根据该确定模块 310 确定的该扰码参数的值以及当前时隙编号, 确定该扰码初始值。
可选地, 作为另一实施例, 该确定单元 321具体用于根据下式确定扰码 初始值 c, :
2xiV +l)x29 + iV DID (12)
χ29 + Ν DID (13)
Figure imgf000031_0001
其中, 《s为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 参数的值。
可选地, 作为另一实施例, 该确定单元 321具体用于根据下式确定扰码 初始值 c, :
mit = ND s Dx2M + (15)
Figure imgf000031_0002
其中, s为当前时隙编号, Λ^。 为公共扰码参数的值, 为特定扰 码参数的值。
可选地, 作为另一实施例, 该加扰模块 320包括:
分段单元 323, 用于将该确定模块 310确定的该扰码参数的值分成至少 两个扰码片段;
第二加扰单元 324, 用于利用该分段单元 323分成的该至少两个扰码片 段加扰该待发送比特。
可选地, 作为另一实施例, 该第二加扰单元 324包括:
第一生成子单元 324a, 用于生成该待发送比特的循环冗余码校验 (CRC) 比特, 并将该待发送比特与该待发送比特的 CRC比特作为待加扰比特; 第一分段子单元 324b, 用于将该第一生成子单元 324a生成的该待加扰 比特分成至少两个待加扰比特片段;
该第一生成子单元 324a还用于生成该第一分段子单元 324b分成的该至 少两个待加扰比特片段中的每个待加扰比特片段的 CRC比特;
第一加扰子单元 324c,用于将该至少两个扰码片段分别加扰在该第一生 成子单元 324a生成的该至少两个待加扰比特片段的 CRC比特上。
可选地, 作为另一实施例, 该第二加扰单元 324包括:
第二分段子单元 324d,用于将该待发送比特分成至少两个待发送比特片 段;
第二生成子单元 324e, 用于生成该第二分段子单元 324d分成的该至少 两个待发送比特片段中的每个待发送比特片段的 CRC比特;
第二加扰子单元 324f,用于将该至少两个扰码片段分别加扰在该第二生 成子单元 324e生成的该至少两个待发送比特片段的 CRC比特上。
根据本发明实施例的用户设备 300可对应于根据本发明实施例的 D2D 通信方法中的第一用户设备, 并且用户设备 300中的各个模块的上述和其它 操作和 /或功能分别为了实现图 1至图 5中的各个方法的相应流程,为了筒洁, 在此不再赘述。
因此, 根据本发明实施例的用户设备, 通过确定公共扰码参数和特定扰 码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对待发送比特进 行加扰, 能够在 D2D通信过程中实现对传输信息的加扰, 从而提高 D2D通 信方案的可行性并提升用户体验。
图 8示出了根据本发明另一实施例的用户设备 400的示意性框图,如图 8所示, 该用户设备 400包括:
接收模块 410, 用于接收第一用户设备发送的比特;
确定模块 420, 用于确定该第一用户设备的扰码参数的值, 该扰码参数 包括下列参数中的至少一种: 公共扰码参数和特定扰码参数;
解扰模块 430, 用于根据该确定模块 420确定的该扰码参数的值, 解扰 该接收模块 410接收到的该比特。
因此, 根据本发明实施例的用户设备, 通过确定公共扰码参数和特定扰 码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对接收到的比特 进行解扰, 能够在 D2D通信过程中实现对传输信息的解扰, 从而提高 D2D 通信方案的可行性并提升用户体验。
可选地, 如果该扰码参数包括该公共扰码参数, 该公共扰码参数的值是 该第一用户设备根据 D2D同步信号确定的; 或
该公共扰码参数的值是该第一用户设备根据 D2D主同步信道 PD2DSCH 确定的; 或
该公共扰码参数的值为该第一用户设备所属的 D2D簇的簇标识。
可选地, 作为另一实施例, 如果该扰码参数包括该特定扰码参数, 该特 定扰码参数的值是利用该第一用户设备的 D2D标识、该第一用户设备的 D2D 组标识和该第一用户设备的业务类型标识中的至少一种标识经过预设函数 运算后得到的。
可选地, 作为另一实施例, 该特定扰码参数的值为该第一用户设备的 D2D标识; 或
该特定扰码参数的值为该第一用户设备的 D2D组标识; 或
该特定扰码参数的值为该第一用户设备的业务类型标识。
可选地, 作为另一实施例, 该函数为散列函数或截短函数。
可选地, 作为另一实施例, 该确定模块 420包括: 第一确定单元 421 , 其中,
该第一确定单元 421用于根据 D2D同步信号, 确定该公共扰码参数的 值; 或
该第一确定单元 421用于根据 D2D主同步信道 PD2DSCH,确定该公共 扰码参数的值; 或
该第一确定单元 421用于将该用户设备 400所属的 D2D簇的簇标识确 定为该公共扰码参数的值。
可选地, 作为另一实施例, 该第一确定单元 421具体用于将该 D2D同 步信号的编号确定为该公共扰码参数的值。
可选地, 作为另一实施例, 该 D2D 同步信号包括 D2D 主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS;
相应地, 该第一确定单元 421具体用于根据该 PD2DSS和该 SD2DSS, 确定该公共扰码参数的值。
可选地, 作为另一实施例, 该第一确定单元 421具体用于根据下式确定 该公共扰码参数的值 N=c1 V DID — J A v SD2DSS 1 v PD2DSS ( 16 ) 其中, N sss为该 SD2DSS的编号, " PD2DSS为该 PD2DSS的编号, 可选地, 作为另一实施例, 该确定模块 420包括:
接收单元 422,用于接收基站或该用户设备 400所属的 D2D簇的簇头发 送的指示信息, 该指示信息用于指示该第一用户设备的扰码参数的值;
第二确定单元 423 , 用于根据该接收单元 422接收的该指示信息, 确定 该扰码参数的值。
可选地, 作为另一实施例, 如果该第一用户设备采用数据信道加扰方式 对待发送比特进行加扰, 则该用户设备 400也可以相应地采用数据信道解扰 方式对接收到的该比特进行解扰, 该解扰模块 430包括:
第三确定单元 431 , 用于根据该确定模块 420确定的该扰码参数的值, 确定扰码初始值;
第一解扰单元 432,用于根据该第三确定单元 431确定的该扰码初始值, 生成扰码序列, 并利用该扰码序列解扰接收到的该比特。
可选地, 作为另一实施例, 该第三确定单元 431具体用于:
将该公共扰码参数的值确定为该扰码初始值; 或
将该特定扰码参数的值确定为该扰码初始值。
可选地, 作为另一实施例, 该第三确定单元 431具体用于根据该确定模 块 420确定的该扰码参数的值以及当前时隙编号, 确定该扰码初始值。
可选地, 作为另一实施例, 该第三确定单元 431具体用于根据下式确定 该 4尤码初始值 c i,nit
x (2x iV + l) x 29 + iV DID ( 17 ) x 29 + N DID ( 18 )
Figure imgf000034_0001
其中, 《s为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 数的值。
可选地, 作为另一实施例, 该第三确定单元 431具体用于根据下式确定 该扰码初始值 c,
+ 1) X 216 + N DspIeDc ( 19 )
Figure imgf000034_0002
c init = iV D=ID x 214 + x 29 + N ( 20 )
~2
其中, 《s为当前时隙编号, Λ^。 为公共扰码参数的值, 为特定扰 码参数的值。
可选地, 作为另一实施例, 如果该第一用户设备采用 CRC加扰方式对 待发送比特进行加扰, 则该用户设备 400也可以采用 CRC解扰方式对接收 到的比特进行解扰, 可选地, 该接收模块 410接收到的该比特包括至少两个 比特片段,该至少两个比特片段中的每个比特片段包括数据比特片段和 CRC 比特;
相应地, 该解扰模块 430包括:
分段单元 433 , 用于将该确定模块 420确定的扰码参数的值分成至少两 个扰码片段;
第二解扰单元 434, 用于利用该分段单元 433分成的该至少两个扰码片 段分别解扰该至少两个比特片段的 CRC比特, 以获得至少两个待校验比特 片段。
可选地, 作为另一实施例, 该用户设备 400还包括:
CRC校验模块 440, 用于对该第二解扰单元 434获得的该至少两个待校 验比特片段中的每个待校验比特片段进行 CRC校验, 以获得该每个待校验 比特片段的数据比特片段;
级联模块 450,用于将该 CRC校验模块 440获得的该至少两个待校验比 特片段的数据比特片段进行级联, 以获得数据比特。
可选地, 作为另一实施例, 该级联模块 450获得的该数据比特包括原始 数据比特和 CRC比特; 相应地,
该 CRC校验模块 440还用于对该级联模块 450获得的该数据比特进行 CRC校验, 以获得该原始数据比特。
根据本发明实施例的用户设备 400可对应于根据本发明实施例的 D2D 通信方法中的第二用户设备, 并且用户设备 400中的各个模块的上述和其它 操作和 /或功能分别为了实现图 6中的各个方法的相应流程, 为了筒洁,在此 不再赘述。
因此, 根据本发明实施例的用户设备, 通过确定公共扰码参数和特定扰 码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对接收到的比特 进行解扰, 能够在 D2D通信过程中实现对传输信息的解扰, 从而提高 D2D 通信方案的可行性并提升用户体验。
图 9示出了根据本发明再一实施例的用户设备 500的示意性框图。如图 9所示, 该用户设备 500包括: 处理器 510和发送器 520。 其中,
该处理器 510用于确定扰码参数的值, 该扰码参数包括下列参数中的至 少一种: 公共扰码参数和特定扰码参数; 以及根据该扰码参数的值, 加扰待 发送比特;
发送器 520, 用于发送该处理器 510加扰后的待发送比特。
因此, 根据本发明实施例的用户设备, 通过确定公共扰码参数和特定扰 码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对待发送比特进 行加扰, 能够在 D2D通信过程中实现对传输信息的加扰, 从而提高 D2D通 信方案的可行性并提升用户体验。
应理解, 在本发明实施例中, 该处理器 510可以是中央处理单元(英文 全称: Central Processing Unit, 英文缩写: CPU ), 该处理器 510还可以是其 他通用处理器、 数字信号处理器(DSP )、 专用集成电路(ASIC )、 现成可编 程门阵列 (FPGA )或者其他可编程逻辑器件、 分立门或者晶体管逻辑器件、 分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常 规的处理器等。
该用户设备 500也可以包括存储器, 该存储器可以包括只读存储器和随 机存取存储器, 并向处理器 510提供指令和数据。 存储器的一部分还可以包 括非易失性随机存取存储器。 例如, 存储器还可以存储设备类型的信息。
在实现过程中, 上述方法的各步骤可以通过处理器 510中的硬件的集成 逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤 可以直接体现为硬件处理器执行完成, 或者用处理器中的硬件及软件模块组 合执行完成。 软件模块可以位于随机存储器, 闪存、 只读存储器, 可编程只 读存储器或者电可擦写可编程存储器、 寄存器等本领域成熟的存储介质中。 该存储介质位于存储器, 处理器 510读取存储器中的信息, 结合其硬件完成 上述方法的步骤。 为避免重复, 这里不再详细描述。
可选地, 该扰码参数包括该公共扰码参数; 相应地, 该处理器 510具体 用于: 根据 D2D同步信号, 确定该公共扰码参数的值; 或
根据 D2D主同步信道 PD2DSCH, 确定该公共扰码参数的值; 或 将该用户设备 500所属的 D2D簇的簇标识确定为该公共扰码参数的值。 可选地, 作为另一实施例, 该处理器 510具体用于将该 D2D同步信号 的编号确定为该公共扰码参数的值。
可选地, 作为另一实施例, 该 D2D 同步信号包括 D2D 主同步信号
PD2DSS和 D2D辅同步信号 SD2DSS;
相应地, 该处理器 510具体用于根据该 PD2DSS和该 SD2DSS, 确定该 公共扰码参数的值。
可选地, 作为另一实施例, 该公共扰码参数的值 Λ¾2"^由下式确定:
I DID — J ^ v SD2DSS ^ 1 V PD2DSS 丄 其中, Ν SD2DSS为该 SD2DSS的编号, N PD2DSS为该 PD2DSS的编号。 可选地, 作为另一实施例, 该扰码参数包括该特定扰码参数; 相应地, 该处理器 510具体用于:
根据该用户设备 500的 D2D标识、 该用户设备 500的 D2D组标识和该 用户设备 500的业务类型标识中的至少一种标识,确定该特定扰码参数的值。
可选地, 作为另一实施例, 该处理器 510具体用于:
将该用户设备 500的 D2D标识确定为该特定扰码参数的值; 或 将该用户设备 500的 D2D组标识确定为该特定扰码参数的值; 或 将该用户设备 500的业务类型标识确定为该特定扰码参数的值。
可选地, 作为另一实施例, 该处理器 510具体用于:
根据该用户设备 500的 D2D标识、 该用户设备 500的 D2D组标识和该 用户设备 500的业务类型标识中的至少一种标识以及散列函数,确定该特定 扰码参数的值; 或
根据该用户设备 500的 D2D标识、 该用户设备 500的 D2D组标识和该 用户设备 500的业务类型标识中的至少一种标识和截短函数,确定该特定扰 码参数的值。
可选地, 作为另一实施例, 该用户设备 500还包括:
接收器 530,用于接收基站或该用户设备 500所属的 D2D簇的簇头发送 的指示信息, 该指示信息用于指示该扰码参数的值;
相应地, 该处理器 510具体用于根据该接收器 530接收的该指示信息, 可选地,作为另一实施例,该处理器 510具体用于根据该扰码参数的值, 确定扰码初始值; 以及根据该扰码初始值, 生成扰码序列, 利用该扰码序列 加扰该待发送比特。
可选地, 作为另一实施例, 该处理器 510具体用于:
将该公共扰码参数的值确定为该扰码初始值; 或
将该特定扰码参数的值确定为该扰码初始值。
可选地, 作为另一实施例, 该处理器 510具体用于根据该扰码参数的值 以及当前时隙编号, 确定该扰码初始值。
可选地, 作为另一实施例, 该处理器 510具体用于根据下式确定扰码初 2 x iV + l) x 29 + iV DID ( 22 ) χ 29 + Ν DID ( 23 )
Figure imgf000038_0001
其中, 《s为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 参数的值。
可选地, 作为另一实施例, 该处理器 510具体用于根据下式确定扰码初 始值 c^ :
Figure imgf000038_0002
其中, 《s为当前时隙编号, Λ^。 为公共扰码参数的值, 为特定扰 码参数的值。
可选地, 作为另一实施例, 该处理器 510具体用于: 将该扰码参数的值 分成至少两个扰码片段; 以及利用该至少两个扰码片段加扰该待发送比特。
可选地, 作为另一实施例, 该处理器 510具体用于: 生成该待发送比特 的循环冗余码校验(CRC )比特, 并将该待发送比特与该待发送比特的 CRC 比特作为待加扰比特; 将该待加扰比特分成至少两个待加扰比特片段; 生成 该至少两个待加扰比特片段中的每个待加扰比特片段的 CRC比特; 以及将 该至少两个扰码片段分别加扰在该至少两个待加扰比特片段的 CRC比特上。
可选地, 作为另一实施例, 该处理器 510具体用于将该待发送比特分成 至少两个待发送比特片段; 生成该至少两个待发送比特片段中的每个待发送 比特片段的 CRC比特; 以及将该至少两个扰码片段分别加扰在该至少两个 待发送比特片段的 CRC比特上。
根据本发明实施例的用户设备 500可对应于根据本发明实施例的 D2D 通信方法中的第一用户设备, 并且用户设备 500中的各个模块的上述和其它 操作和 /或功能分别为了实现图 1至图 5中的各个方法的相应流程,为了筒洁, 在此不再赘述。
因此, 根据本发明实施例的用户设备, 通过确定公共扰码参数和特定扰 码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对待发送比特进 行加扰, 能够在 D2D通信过程中实现对传输信息的加扰, 从而提高 D2D通 信方案的可行性并提升用户体验。
图 10示出了根据本发明再一实施例的用户设备 600的示意性框图, 如 图 10所示, 该用户设备 600包括:
接收器 610, 用于接收第一用户设备发送的比特;
处理器 620, 用于确定该第一用户设备的扰码参数的值, 该扰码参数包 括下列参数中的至少一种: 公共扰码参数和特定扰码参数; 以及根据该扰码 参数的值, 解扰该接收器 610接收到的该比特。
因此, 根据本发明实施例的用户设备, 通过确定公共扰码参数和特定扰 码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对接收到的比特 进行解扰, 能够在 D2D通信过程中实现对传输信息的解扰, 从而提高 D2D 通信方案的可行性并提升用户体验。
应理解, 在本发明实施例中, 该处理器 610可以是中央处理单元, 该处 理器 610 还可以是其他通用处理器、 数字信号处理器(DSP )、 专用集成电 路(ASIC )、 现成可编程门阵列 (FPGA )或者其他可编程逻辑器件、 分立 门或者晶体管逻辑器件、 分立硬件组件等。 通用处理器可以是微处理器或者 该处理器也可以是任何常规的处理器等。
可选地, 该用户设备 600还可以包括存储器, 该存储器可以包括只读存 储器和随机存取存储器, 并向处理器 620提供指令和数据。 存储器的一部分 还可以包括非易失性随机存取存储器。 例如, 存储器还可以存储设备类型的 信息。
在实现过程中, 上述方法的各步骤可以通过处理器 620中的硬件的集成 逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤 可以直接体现为硬件处理器执行完成, 或者用处理器中的硬件及软件模块组 合执行完成。 软件模块可以位于随机存储器, 闪存、 只读存储器, 可编程只 读存储器或者电可擦写可编程存储器、 寄存器等本领域成熟的存储介质中。 该存储介质位于存储器, 处理器 620读取存储器中的信息, 结合其硬件完成 上述方法的步骤。 为避免重复, 这里不再详细描述。
可选地, 如果该扰码参数包括该公共扰码参数, 该公共扰码参数的值是 该第一用户设备根据 D2D同步信号确定的; 或
该公共扰码参数的值是该第一用户设备根据 D2D主同步信道 PD2DSCH 确定的; 或
该公共扰码参数的值为该第一用户设备所属的 D2D簇的簇标识。
可选地, 作为另一实施例, 如果该扰码参数包括该特定扰码参数, 该特 定扰码参数的值是利用该第一用户设备的 D2D标识、该第一用户设备的 D2D 组标识和该第一用户设备的业务类型标识中的至少一种标识经过预设函数 运算后得到的。
可选地, 作为另一实施例, 该特定扰码参数的值为该第一用户设备的
D2D标识; 或
该特定扰码参数的值为该第一用户设备的 D2D组标识; 或
该特定扰码参数的值为该第一用户设备的业务类型标识。
可选地, 作为另一实施例, 该函数为散列函数或截短函数。
可选地, 作为另一实施例, 该处理器 620具体用于:
根据 D2D同步信号, 确定该公共扰码参数的值; 或
根据 D2D主同步信道 PD2DSCH, 确定该公共扰码参数的值; 或 将该用户设备 600所属的 D2D簇的簇标识确定为该公共扰码参数的值。 可选地, 作为另一实施例, 该处理器 620具体用于将该 D2D同步信号 的编号确定为该公共扰码参数的值。
可选地, 作为另一实施例, 该 D2D 同步信号包括 D2D 主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS;
相应地, 该处理器 620具体用于根据该 PD2DSS和该 SD2DSS , 确定该 公共扰码参数的值。
可选地, 作为另一实施例, 该处理器 620具体用于根据下式确定该公共 扰码参数的值 V D' 2D
1 Π V DDIIDD ~ JD i ΠV SSDD22DDSSSS 1 PD2DSS 0 ' 其中, N
N SD2DSS为该 SD2DSS的编号, PD2DSS为该 PD2DSS的编号。 可选地, 作为另一实施例, 该接收器 610还用于接收基站或该用户设备 600所属的 D2D簇的簇头发送的指示信息,该指示信息用于指示该第一用户 设备的扰码参数的值;
该处理器 620还用于根据该接收器 610接收的该指示信息,确定该扰码 参数的值。
可选地, 作为另一实施例, 如果该第一用户设备采用数据信道加扰方式 对待发送比特进行加扰, 则该用户设备 600也可以相应地采用数据信道解扰 方式对接收到的该比特进行解扰, 该处理器 620具体用于根据该扰码参数的 值, 确定扰码初始值; 以及根据该扰码初始值, 生成扰码序列, 并利用该扰 码序列解 4尤接收到的该比特。
可选地, 作为另一实施例, 该处理器 620具体用于:
将该公共扰码参数的值确定为该扰码初始值; 或
将该特定扰码参数的值确定为该扰码初始值。
可选地, 作为另一实施例, 该处理器 620具体用于根据该扰码参数的值 以及当前时隙编号, 确定该扰码初始值。
可选地, 作为另一实施例, 该处理器 620具体用于根据下式确定该扰码 初始值 c, :
ns
init + 1) X (2 X Νη2η + 1) χ 29 + Nn2n ( 27 ) 2 ns
Cinit x 29 + N DID ( 28 ) ~2
其中, 《s为当前时隙编号, Λ^为该公共扰码参数的值或该特定扰码 数的值。
可选地, 作为另一实施例, 该处理器 620具体用于根据下式确定该扰码 初始值 C i,nit '
( 29 )
Figure imgf000042_0001
ns
x 29 + ND c°^ ( 30 ) ~2
其中, 《s为当前时隙编号, Λ^。 为公共扰码参数的值, 为特定扰 码参数的值。
可选地, 作为另一实施例, 如果该第一用户设备采用 CRC加扰方式对 待发送比特进行加扰, 则该用户设备 600也可以采用 CRC解扰方式对接收 到的比特进行解扰, 可选地, 该接收器 610接收到的该比特包括至少两个比 特片段, 该至少两个比特片段中的每个比特片段包括数据比特片段和 CRC 比特;
相应地,该处理器 620具体用于将该扰码参数的值分成至少两个扰码片 段; 以及利用该至少两个扰码片段分别解扰该至少两个比特片段的 CRC比 特, 以获得至少两个待校验比特片段。
可选地, 作为另一实施例, 该处理器 620还用于对获得的该至少两个待 校验比特片段中的每个待校验比特片段进行 CRC校验, 以获得该每个待校 验比特片段的数据比特片段; 以及将该至少两个待校验比特片段的数据比特 片段进行级联, 以获得数据比特。
可选地, 作为另一实施例, 该处理器 620获得的该数据比特包括原始数 据比特和 CRC比特; 相应地,
该处理器 620还用于该数据比特进行 CRC校验, 以获得该原始数据比 特。
根据本发明实施例的用户设备 600可对应于根据本发明实施例的 D2D 通信方法中的第二用户设备, 并且用户设备 600中的各个模块的上述和其它 操作和 /或功能分别为了实现图 6中的各个方法的相应流程, 为了筒洁,在此 不再赘述。
因此, 根据本发明实施例的用户设备, 通过确定公共扰码参数和特定扰 码参数中的至少一种扰码参数的值, 并根据该扰码参数的值对接收到的比特 进行解扰, 能够在 D2D通信过程中实现对传输信息的解扰, 从而提高 D2D 通信方案的可行性并提升用户体验。 应理解, 在本发明实施例中, 术语"和 /或"仅仅是一种描述关联对象的关 联关系,表示可以存在三种关系。 例如, A和 /或 B, 可以表示: 单独存在 A, 同时存在 A和 B, 单独存在 B这三种情况。 另外, 本文中字符" /", 一般表 示前后关联对象是一种"或"的关系。
本领域普通技术人员可以意识到, 结合本文中所公开的实施例中描述的 各方法步骤和单元, 能够以电子硬件、 计算机软件或者二者的结合来实现, 为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性 地描述了各实施例的步骤及组成。 这些功能究竟以硬件还是软件方式来执 行, 取决于技术方案的特定应用和设计约束条件。 本领域普通技术人员可以 对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应 认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到, 为了描述的方便和筒洁, 上述 描述的系统、 装置和单元的具体工作过程, 可以参考前述方法实施例中的对 应过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统、 装置和 方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示 意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可 以有另外的划分方式, 例如多个单元或组件可以结合或者可以集成到另一个 系统, 或一些特征可以忽略, 或不执行。 另外, 所显示或讨论的相互之间的 耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或 通信连接, 也可以是电的, 机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作 为单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或 者全部单元来实现本发明实施例方案的目的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元 中, 也可以是各个单元单独物理存在, 也可以是两个或两个以上单元集成在 一个单元中。 上述集成的单元既可以采用硬件的形式实现, 也可以采用软件 功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销 售或使用时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本发明的技术方案本质上或者说对现有技术做出贡献的部分, 或者该技术方 案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在 一个存储介质中, 包括若干指令用以使得一台计算机设备(可以是个人计算 机, 服务器, 或者网络设备等)执行本发明各个实施例所述方法的全部或部 分步骤。 而前述的存储介质包括: U盘、 移动硬盘、 只读存储器(英文全称: Read-Only Memory,英文缩写: ROM ),随机存取存储器(英文全称: Random Access Memory, 英文缩写: RAM )、 磁碟或者光盘等各种可以存储程序代 码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到各种等效的修改或替换, 这些修改或替换都应涵盖在本发明的保护范围 之内。 因此, 本发明的保护范围应以权利要求的保护范围为准。

Claims

权利要求
1. 一种设备到设备 D2D通信方法, 其特征在于, 包括:
第一用户设备确定扰码参数的值, 所述扰码参数包括下列参数中的至少 一种: 公共扰码参数和特定扰码参数;
所述第一用户设备根据所述扰码参数的值, 加扰待发送比特; 所述第一用户设备发送加扰后的待发送比特。
2. 根据权利要求 1所述的 D2D通信方法, 其特征在于, 所述扰码参数 包括所述公共扰码参数;
所述第一用户设备确定扰码参数的值, 包括:
所述第一用户设备根据 D2D 同步信号, 确定所述公共扰码参数的值; 或
所述第一用户设备根据 D2D主同步信道 PD2DSCH ,确定所述公共扰码 参数的值; 或
所述第一用户设备将所述第一用户设备所属的 D2D簇的簇标识确定为 所述公共扰码参数的值。
3. 根据权利要求 2所述的 D2D通信方法, 其特征在于, 所述第一用户 设备根据 D2D同步信号, 确定所述公共扰码参数的值, 包括:
所述第一用户设备将所述 D2D 同步信号的编号确定为所述公共扰码参 数的值。
4. 根据权利要求 2所述的 D2D通信方法, 其特征在于, 所述 D2D同 步信号包括 D2D主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS;
所述第一用户设备根据 D2D 同步信号, 确定所述公共扰码参数的值, 包括:
所述第一用户设备根据所述 PD2DSS和所述 SD2DSS , 确定所述公共扰 码参数的值。
5. 根据权利要求 4所述的 D2D通信方法, 其特征在于, 所述公共扰码 参数的值 由下式确定:
1 v DID — J A j v SD2DSS 1 v PD2DSS
其中, NSD2DSS为所述 SD2DSS的编号, N P。2DSS为所述 PD2DSS的编 号。
6. 根据权利要求 1至 5中任一项所述的 D2D通信方法, 其特征在于, 所述扰码参数包括所述特定扰码参数;
所述第一用户设备确定扰码参数的值, 包括:
所述第一用户设备根据所述第一用户设备的 D2D标识、 所述第一用户 设备的 D2D组标识和所述第一用户设备的业务类型标识中的至少一种标识, 确定所述特定扰码参数的值。
7. 根据权利要求 6所述的 D2D通信方法, 其特征在于, 所述第一用户 设备根据所述第一用户设备的 D2D标识、 所述第一用户设备的 D2D组标识 和所述第一用户设备的业务类型标识中的至少一种标识,确定所述特定扰码 参数的值, 包括:
所述第一用户设备将所述第一用户设备的 D2D标识确定为所述特定扰 码参数的值; 或
所述第一用户设备将所述第一用户设备的 D2D组标识确定为所述特定 扰码参数的值; 或
所述第一用户设备将所述第一用户设备的业务类型标识确定为所述特 定扰码参数的值。
8. 根据权利要求 6所述的 D2D通信方法, 其特征在于, 所述第一用户 设备根据所述第一用户设备的 D2D标识、 所述第一用户设备的 D2D组标识 和所述第一用户设备的业务类型标识中的至少一种标识,确定所述特定扰码 参数的值, 包括:
所述第一用户设备根据所述第一用户设备的 D2D标识、 所述第一用户 设备的 D2D组标识和所述第一用户设备的业务类型标识中的至少一种标识 以及散列函数, 确定所述特定扰码参数的值; 或
所述第一用户设备根据所述第一用户设备的 D2D标识、 所述第一用户 设备的 D2D组标识和所述第一用户设备的业务类型标识中的至少一种标识 和截短函数, 确定所述特定扰码参数的值。
9. 根据权利要求 1所述的 D2D通信方法, 其特征在于, 所述第一用户 设备确定扰码参数的值, 包括:
所述第一用户设备接收基站或所述第一用户设备所属的 D2D簇的簇头 发送的指示信息, 所述指示信息用于指示所述扰码参数的值;
所述第一用户设备根据所述指示信息, 确定所述扰码参数的值。
10. 根据权利要求 1至 9中任一项所述的 D2D通信方法, 其特征在于, 所述第一用户设备根据所述扰码参数的值, 加扰待发送比特, 包括:
所述第一用户设备根据所述扰码参数的值, 确定扰码初始值;
所述第一用户设备根据所述扰码初始值, 生成扰码序列, 利用所述扰码 序列加扰所述待发送比特。
11. 根据权利要求 10所述的 D2D通信方法, 其特征在于, 所述第一用 户设备根据所述扰码参数的值, 确定扰码初始值, 包括:
所述第一用户设备将所述公共扰码参数的值确定为所述扰码初始值; 或 所述第一用户设备将所述特定扰码参数的值确定为所述扰码初始值。
12. 根据权利要求 10所述的 D2D通信方法, 其特征在于, 所述第一用 户设备根据所述扰码参数的值, 确定扰码初始值, 包括:
所述第一用户设备根据所述扰码参数的值以及当前时隙编号,确定所述 扰码初始值。
13. 根据权利要求 12所述的 D2D通信方法, 其特征在于, 所述扰码初 始值 cm 由下式确定: init + 1) χ (2 χ ND2D + 1) χ 29 + ND2D , 或
Cinit 29 + N Dr ID
Figure imgf000047_0001
其中, 为当前时隙编号, Λ^为所述公共扰码参数的值或所述特定 扰码参数的值。
14. 根据权利要求 12所述的 D2D通信方法, 其特征在于, 所述扰码初 始值 定: + , 或
Figure imgf000047_0002
其中, 《s为当前时隙编号, Λ^。 为公共扰码参数的值, 为特定扰 码参数的值。
15. 根据权利要求 1至 9中任一项所述的 D2D通信方法, 其特征在于, 所述第一用户设备根据所述扰码参数的值, 加扰待发送比特, 包括:
所述第一用户设备将所述扰码参数的值分成至少两个扰码片段;
16. 根据权利要求 15所述的 D2D通信方法, 其特征在于, 所述第一用 所述第一用户设备生成所述待发送比特的循环冗余码校验 CRC比特, 并将所述待发送比特与所述待发送比特的 CRC比特作为待加扰比特;
所述第一用户设备将所述待加扰比特分成至少两个待加扰比特片段; 所述第一用户设备生成所述至少两个待加扰比特片段中的每个待加扰 比特片段的 CRC比特;
所述第一用户设备将所述至少两个扰码片段分别加扰在所述至少两个 待加扰比特片段的 CRC比特上。
17. 根据权利要求 15所述的 D2D通信方法, 其特征在于, 所述第一用
比特片段的 CRC比特;
所述第一用户设备将所述至少两个扰码片段分别加扰在所述至少两个 待发送比特片段的 CRC比特上。
18. 一种设备到设备 D2D通信方法, 其特征在于, 包括:
第二用户设备接收第一用户设备发送的比特;
所述第二用户设备确定所述第一用户设备的扰码参数的值, 所述扰码参 数包括下列参数中的至少一种: 公共扰码参数和特定扰码参数;
所述第二用户设备根据所述扰码参数的值, 解扰接收到的所述比特。
19. 根据权利要求 18所述的 D2D通信方法, 其特征在于, 所述公共扰 码参数的值是所述第一用户设备根据 D2D同步信号确定的; 或
所述公共扰码参数的值是所述第一用户设备根据 D2D 主同步信道
PD2DSCH确定的; 或
所述公共扰码参数的值为所述第一用户设备所属的 D2D簇的簇标识。
20. 根据权利要求 18或 19所述的 D2D通信方法, 其特征在于, 所述 特定扰码参数的值是利用所述第一用户设备的 D2D标识、 所述第一用户设 备的 D2D组标识和所述第一用户设备的业务类型标识中的至少一种标识经 过预设函数运算后得到的。
21. 根据权利要求 20所述的 D2D通信方法, 其特征在于, 所述特定扰 码参数的值为所述第一用户设备的 D2D标识; 或
所述特定扰码参数的值为所述第一用户设备的 D2D组标识; 或 所述特定扰码参数的值为所述第一用户设备的业务类型标识。
22. 根据权利要求 20所述的 D2D通信方法, 其特征在于, 所述预设函 数为散列函数或截短函数。
23. 根据权利要求 18至 22中任一项所述的 D2D通信方法, 其特征在 于, 所述第二用户设备确定所述第一用户设备的扰码参数的值, 包括: 所述第二用户设备根据 D2D 同步信号, 确定所述公共扰码参数的值; 或
所述第二用户设备根据 D2D主同步信道 PD2DSCH ,确定所述公共扰码 参数的值; 或
所述第二用户设备将所述第二用户设备所属的 D2D簇的簇标识确定为 所述公共扰码参数的值。
24. 根据权利要求 23所述的 D2D通信方法, 其特征在于, 所述第二用 户设备根据 D2D同步信号, 确定所述公共扰码参数的值, 包括:
所述第二用户设备将所述 D2D 同步信号的编号确定为所述公共扰码参 数的值。
25. 根据权利要求 23所述的 D2D通信方法, 其特征在于, 所述 D2D 同步信号包括 D2D主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS;
所述第二用户设备根据 D2D 同步信号, 确定所述公共扰码参数的值, 包括:
所述第二用户设备根据所述 PD2DSS和所述 SD2DSS , 确定所述公共扰 码参数的值。
26. 根据权利要求 25所述的 D2D通信方法, 其特征在于, 所述公共扰 码参数的值 Nc 由下式确定:
Figure imgf000049_0001
其中, NSD2DSS为所述 SD2DSS的编号, N PD2DSS为所述 PD2DSS的编 号。
27. 根据权利要求 18至 22中任一项所述的 D2D通信方法, 其特征在 于, 所述第二用户设备确定所述第一用户设备的扰码参数的值, 包括: 所述第二用户设备接收基站或所述第二用户设备所属的 D2D簇的簇头 发送的指示信息, 所述指示信息用于指示所述第一用户设备的扰码参数的 值;
二 2用户设备根据所述指示信息, 确定所述扰码参数的值。
28. 根据权利要求 18至 27中任一项所述的 D2D通信方法, 其特征在 于, 所述第二用户设备根据所述扰码参数的值, 解扰接收到的所述比特, 包 括:
所述第二用户设备根据所述扰码参数的值, 确定扰码初始值; 所述第二用户设备根据所述扰码初始值, 生成扰码序列, 并利用所述扰 码序列解 4尤接收到的所述比特。
29. 根据权利要求 28所述的 D2D通信方法, 其特征在于, 所述第二用 户设备根据所述扰码参数的值, 确定扰码初始值, 包括:
所述第二用户设备将所述公共扰码参数的值确定为所述扰码初始值; 或 所述第二用户设备将所述特定扰码参数的值确定为所述扰码初始值。
30. 根据权利要求 28所述的 D2D通信方法, 其特征在于, 所述第二用 户设备根据所述扰码参数的值, 确定扰码初始值, 包括:
所述第二用户设备根据所述扰码参数的值以及当前时隙编号,确定所述 扰码初始值。
31. 根据权利要求 30所述的 D2D通信方法, 其特征在于, 所述扰码初 始值 cm 定: init + 1) x (2 x ND2D + 1) χ 29 + ND2D , 或
Figure imgf000050_0001
Cinit X 29 + Ν DID 其中, 《s为当前时隙编号, Λ^为所述公共扰码参数的值或所述特定 扰码参数的值。
32. 根据权利要求 30所述的 D2D通信方法, 其特征在于, 所述扰码初 始值 C init , 或
Figure imgf000050_0002
C = D 214 + x 29 + N Dr°2mDm 其中, s为当前时隙编号, vmm为公共扰码参数的值, VJ^为特定扰 码参数的值。
33. 根据权利要求 18至 32中任一项所述的 D2D通信方法, 其特征在 于, 所述第二用户设备接收到的所述比特包括至少两个比特片段, 所述至少 两个比特片段中的每个比特片段包括数据比特片段和 CRC比特;
所述第二用户设备利用所述扰码序列解扰接收到的所述比特, 包括: 所述第二用户设备将所述扰码参数的值分成至少两个扰码片段; 所述第二用户设备利用所述至少两个扰码片段分别解扰所述至少两个 比特片段的 CRC比特, 以获得至少两个待校验比特片段。
34. 根据权利要求 33所述的 D2D通信方法, 其特征在于, 所述方法还 包括: 特片段进行 CRC校验, 以获得所述每个待校验比特片段的数据比特片段; 所述第二用户设备将所述至少两个待校验比特片段的数据比特片段进 行级联, 以获得数据比特。
35. 根据权利要求 34所述的 D2D通信方法, 其特征在于, 所述数据比 特包括原始数据比特和 CRC比特;
所述方法还包括:
所述第二用户设备对所述数据比特进行 CRC校验, 以获得所述原始数 据比特。
36. 一种用户设备, 其特征在于, 包括:
确定模块, 用于确定扰码参数的值, 所述扰码参数包括下列参数中的至 少一种: 公共扰码参数和特定扰码参数;
加扰模块, 用于根据所述确定模块确定的所述扰码参数的值, 加扰待发 送比特;
发送模块, 用于发送所述加扰模块加扰后的待发送比特。
37. 根据权利要求 36所述的用户设备, 其特征在于, 所述扰码参数包 括所述公共扰码参数;
所述确定模块包括: 第一确定单元, 其中,
所述第一确定单元用于根据 D2D 同步信号, 确定所述公共扰码参数的 值; 或 所述第一确定单元用于根据 D2D主同步信道 PD2DSCH,确定所述公共 扰码参数的值; 或
所述第一确定单元用于将所述用户设备所属的 D2D簇的簇标识确定为 所述公共扰码参数的值。
38. 根据权利要求 37所述的用户设备, 其特征在于, 所述第一确定单 元具体用于将所述 D2D同步信号的编号确定为所述公共扰码参数的值。
39. 根据权利要求 37所述的用户设备, 其特征在于, 所述 D2D同步信 号包括 D2D主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS;
所述第一确定单元具体用于根据所述 PD2DSS和所述 SD2DSS , 确定所 述公共扰码参数的值。
40. 根据权利要求 39所述的用户设备, 其特征在于, 所述公共扰码参 数的值 Λ¾σ 2 "^由下式确定:
1 V DID — J A j v SD2DSS 1 v PD2DSS
其中, N SD2DSS为所述 SD2DSS的编号, N PD2DSS为所述 PD2DSS的编 号。
41. 根据权利要求 36至 40中任一项所述的用户设备, 其特征在于, 所 述扰码参数包括所述特定扰码参数;
所述确定模块包括:
第二确定单元, 用于根据所述用户设备的 D2D标识、 所述用户设备的 D2D组标识和所述用户设备的业务类型标识中的至少一种标识,确定所述特 定扰码参数的值。
42. 根据权利要求 41所述的用户设备, 其特征在于, 所述第二确定单 元具体用于:
将所述用户设备的 D2D标识确定为所述特定扰码参数的值; 或 将所述用户设备的 D2D组标识确定为所述特定扰码参数的值; 或 将所述用户设备的业务类型标识确定为所述特定扰码参数的值。
43. 根据权利要求 41所述的用户设备, 其特征在于, 所述第二确定单 元具体用于:
根据所述用户设备的 D2D标识、 所述用户设备的 D2D组标识和所述用 户设备的业务类型标识中的至少一种标识以及散列函数,确定所述特定扰码 参数的值; 或 根据所述用户设备的 D2D标识、 所述用户设备的 D2D组标识和所述用 户设备的业务类型标识中的至少一种标识和截短函数,确定所述特定扰码参 数的值。
44. 根据权利要求 36所述的用户设备, 其特征在于, 所述确定模块包 括:
接收单元, 用于接收基站或所述用户设备所属的 D2D簇的簇头发送的 指示信息, 所述指示信息用于指示所述扰码参数的值;
第三确定单元, 用于根据所述接收单元接收的所述指示信息, 确定所述 扰码参数的值。
45. 根据权利要求 36至 44中任一项所述的用户设备, 其特征在于, 所 述加扰模块包括:
确定单元, 用于根据所述扰码参数的值, 确定扰码初始值;
第一加扰单元, 用于根据所述确定单元确定的所述扰码初始值, 生成扰 码序列, 利用所述扰码序列加扰所述待发送比特。
46. 根据权利要求 45所述的用户设备, 其特征在于, 所述确定单元具 体用于:
将所述公共扰码参数的值确定为所述扰码初始值; 或
将所述特定扰码参数的值确定为所述扰码初始值。
47. 根据权利要求 45所述的用户设备, 其特征在于, 所述确定单元具 体用于:
根据所述扰码参数的值以及当前时隙编号, 确定所述扰码初始值。
48. 根据权利要求 47所述的用户设备, 其特征在于, 所述确定单元具 体用于根据下式确定所述扰码初始值 c,mt: init 1) χ (2 χ ND2D + 1) χ 29 + ND2D , 或
Cinit 29 + N Dr ID
Figure imgf000053_0001
其中, 《s为当前时隙编号, Λ^为所述公共扰码参数的值或所述特定 扰码参数的值。
49. 根据权利要求 47所述的用户设备, 其特征在于, 所述确定单元具 体用于根据下式确定所述扰码初始值 cimt: init + Ns"2 e D c , 或
Figure imgf000054_0001
其中, s为当前时隙编号, vmm为公共扰码参数的值, VJ^为特定扰 码参数的值。
50. 根据权利要求 36至 44中任一项所述的用户设备, 其特征在于, 所 述加扰模块包括:
分段单元, 用于将所述扰码参数的值分成至少两个扰码片段; 扰所述待发送比特。
51. 根据权利要求 50所述的用户设备, 其特征在于, 所述第二加扰单 元包括:
第一生成子单元, 用于生成所述待发送比特的循环冗余码校验 CRC比 特, 并将所述待发送比特与所述待发送比特的 CRC比特作为待加扰比特; 第一分段子单元,用于将所述第一生成子单元生成的所述待加扰比特分 成至少两个待加扰比特片段;
所述第一生成子单元还用于生成所述第一分段子单元分成的所述至少 两个待加扰比特片段中的每个待加扰比特片段的 CRC比特;
第一加扰子单元 ,用于将所述至少两个扰码片段分别加扰在所述第一生 成子单元生成的所述至少两个待加扰比特片段的 CRC比特上。
52. 根据权利要求 51所述的 D2D通信方法, 其特征在于, 所述第二加 扰单元包括: 段; 、 、 ' ' 、 ' '
第二生成子单元,用于生成所述第二分段子单元分成的所述至少两个待 发送比特片段中的每个待发送比特片段的 CRC比特;
第二加扰子单元 ,用于将所述至少两个扰码片段分别加扰在所述第二生
53. 一种用户设备, 其特征在于, 包括:
接收模块, 用于接收第一用户设备发送的比特; 确定模块, 用于确定所述第一用户设备的扰码参数的值, 所述扰码参数 包括下列参数中的至少一种: 公共扰码参数和特定扰码参数;
解扰模块, 用于根据所述确定模块确定的所述扰码参数的值, 解扰所述 接收模块接收到的所述比特。
54. 根据权利要求 53所述的用户设备, 其特征在于, 所述公共扰码参 数的值是所述第一用户设备根据 D2D同步信号确定的; 或
所述公共扰码参数的值是所述第一用户设备根据 D2D 主同步信道 PD2DSCH确定的; 或
所述公共扰码参数的值为所述第一用户设备所属的 D2D簇的簇标识。
55. 根据权利要求 53或 54所述的用户设备, 其特征在于, 所述特定扰 码参数的值是利用所述第一用户设备的 D2D标识、所述第一用户设备的 D2D 组标识和所述第一用户设备的业务类型标识中的至少一种标识经过预设函 数运算后得到的。
56. 根据权利要求 55所述的用户设备, 其特征在于, 所述特定扰码参 数的值为所述第一用户设备的 D2D标识; 或
所述特定扰码参数的值为所述第一用户设备的 D2D组标识; 或 所述特定扰码参数的值为所述第一用户设备的业务类型标识。
57. 根据权利要求 55所述的用户设备, 其特征在于, 所述函数为散列 函数或截短函数。
58. 根据权利要求 53至 57中任一项所述的 D2D通信方法, 其特征在 于, 所述确定模块包括: 第一确定单元, 其中,
所述第一确定单元用于根据 D2D 同步信号, 确定所述公共扰码参数的 值; 或
所述第一确定单元用于根据 D2D主同步信道 PD2DSCH,确定所述公共 扰码参数的值; 或
所述第一确定单元用于将所述用户设备所属的 D2D簇的簇标识确定为 所述公共扰码参数的值。
59. 根据权利要求 58所述的用户设备, 其特征在于, 所述第一确定单 元具体用于将所述 D2D同步信号的编号确定为所述公共扰码参数的值。
60. 根据权利要求 58所述的 D2D通信方法, 其特征在于, 所述 D2D 同步信号包括 D2D主同步信号 PD2DSS和 D2D辅同步信号 SD2DSS; 所述第一确定单元具体用于根据所述 PD2DSS和所述 SD2DSS , 确定所 述公共扰码参数的值。
61. 根据权利要求 60所述的 D2D通信方法, 其特征在于, 所述公共扰 码参数的值 Nc 由下式确定:
1 v DID — J A j v SD2DSS 1 v PD2DSS
其中, NSD2DSS为所述 SD2DSS的编号, N PD2DSS为所述 PD2DSS的编 号。
62. 根据权利要求 53至 57中任一项所述的用户设备, 其特征在于, 所 述确定模块包括:
接收单元, 用于接收基站或所述用户设备所属的 D2D簇的簇头发送的 指示信息, 所述指示信息用于指示所述第一用户设备的扰码参数的值; 第二确定单元, 用于根据所述接收单元接收的所述指示信息, 确定所述 扰码参数的值。
63. 根据权利要求 53至 62中任一项所述的用户设备, 其特征在于, 所 述解扰模块包括:
第三确定单元, 用于根据所述扰码参数的值, 确定扰码初始值; 第一解扰单元, 用于根据所述第三确定单元确定的所述扰码初始值, 生 成扰码序列, 并利用所述扰码序列解扰接收到的所述比特。
64. 根据权利要求 63所述的用户设备, 其特征在于, 所述第三确定单 元具体用于:
将所述公共扰码参数的值确定为所述扰码初始值; 或
将所述特定扰码参数的值确定为所述扰码初始值。
65. 根据权利要求 63所述的用户设备, 其特征在于, 所述第三确定单 元具体用于:
根据所述扰码参数的值以及当前时隙编号, 确定所述扰码初始值。
66. 根据权利要求 65所述的用户设备, 其特征在于, 所述第三确定单 元具体 下式确定所述扰码初始值 ς ί : init x (2x iVD2D + l) x 29 + iVD2D , 或
Cinit + VD2D
Figure imgf000056_0001
其中, 为当前时隙编号, Vn7 n为所述公共扰码参数的值或所述特定 扰码参数的值。
67. 根据权利要求 65所述的用户设备, 其特征在于, 所述第三确定单 元具体 : init , 或
Figure imgf000057_0001
其中, s为当前时隙编号, Λ^。 为公共扰码参数的值, 为特定扰 码参数的值。
68. 根据权利要求 63至 67中任一项所述的用户设备, 其特征在于, 所 述接收模块接收到的所述比特包括至少两个比特片段, 所述至少两个比特片 段中的每个比特片段包括数据比特片段和 CRC比特;
所述解扰模块包括:
分段单元, 用于将所述扰码参数的值分成至少两个扰码片段; 别解扰所述至少两个比特片段的 CRC比特, 以获得至少两个待校验比特片 段。
69. 根据权利要求 68所述的用户设备, 其特征在于, 所述用户设备还 包括:
CRC校验模块,用于对所述第二解扰单元获得的所述至少两个待校验比 特片段中的每个待校验比特片段进行 CRC校验, 以获得所述每个待校验比 特片段的数据比特片段;
级联模块, 用于将所述 CRC校验模块获得的所述至少两个待校验比特 片段的数据比特片段进行级联, 以获得数据比特。
70. 根据权利要求 69所述的用户设备, 其特征在于, 所述级联模块获 得的所述数据比特包括原始数据比特和 CRC比特;
所述 CRC校验模块还用于对所述级联模块获得的所述数据比特进行
CRC校验, 以获得所述原始数据比特。
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