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 PDFInfo
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- 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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- user equipment
- value
- parameter
- scrambling
- scrambling code
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 113
- 230000006854 communication Effects 0.000 title claims abstract description 109
- 238000004891 communication Methods 0.000 title claims abstract description 96
- 239000012634 fragment Substances 0.000 claims description 22
- 241000854291 Dianthus carthusianorum Species 0.000 claims description 17
- 230000011218 segmentation Effects 0.000 claims description 12
- 125000004122 cyclic group Chemical group 0.000 claims description 10
- TVZRAEYQIKYCPH-UHFFFAOYSA-N 3-(trimethylsilyl)propane-1-sulfonic acid Chemical compound C[Si](C)(C)CCCS(O)(=O)=O TVZRAEYQIKYCPH-UHFFFAOYSA-N 0.000 claims description 6
- 238000012795 verification Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 20
- 230000006870 function Effects 0.000 description 53
- 238000010586 diagram Methods 0.000 description 12
- 238000012545 processing Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 230000011664 signaling Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0008—Synchronisation information channels, e.g. clock distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery 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
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KR1020167020034A KR101862737B1 (ko) | 2014-01-22 | 2014-01-22 | 장치-대-장치 통신 방법 및 사용자 장비 |
EP14879540.4A EP3079294B1 (en) | 2014-01-22 | 2014-01-22 | Device-to-device communication method and user equipment |
US15/112,849 US10129917B2 (en) | 2014-01-22 | 2014-01-22 | Device to device communication method and user equipment |
CN201910376643.9A CN110113134B (zh) | 2014-01-22 | 2014-01-22 | 设备到设备通信方法和用户设备 |
CN201480072014.2A CN105900368B (zh) | 2014-01-22 | 2014-01-22 | 设备到设备通信方法和用户设备 |
PCT/CN2014/071129 WO2015109461A1 (zh) | 2014-01-22 | 2014-01-22 | 设备到设备通信方法和用户设备 |
JP2016547881A JP6316444B2 (ja) | 2014-01-22 | 2014-01-22 | デバイス間通信方法およびユーザ機器 |
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CN110545155A (zh) * | 2018-05-29 | 2019-12-06 | 中兴通讯股份有限公司 | 部分伪随机化处理方法、相应装置、设备及存储介质 |
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US20160112221A1 (en) * | 2013-11-27 | 2016-04-21 | Shanghai Langbo Communication Technology Company Limited | Method for ue and user equipment |
US20170006563A1 (en) * | 2014-01-31 | 2017-01-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Monitoring Synchronization Signals in Device-to-Device Communication |
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US20160345375A1 (en) | 2016-11-24 |
CN105900368A (zh) | 2016-08-24 |
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CN110113134B (zh) | 2021-08-13 |
JP2017504269A (ja) | 2017-02-02 |
US10129917B2 (en) | 2018-11-13 |
CN110113134A (zh) | 2019-08-09 |
EP3079294A1 (en) | 2016-10-12 |
KR20160102278A (ko) | 2016-08-29 |
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EP3079294B1 (en) | 2019-03-13 |
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