CN106686714B - Clock synchronizing method, synchronizing information method and device - Google Patents

Clock synchronizing method, synchronizing information method and device Download PDF

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Publication number
CN106686714B
CN106686714B CN201510746483.4A CN201510746483A CN106686714B CN 106686714 B CN106686714 B CN 106686714B CN 201510746483 A CN201510746483 A CN 201510746483A CN 106686714 B CN106686714 B CN 106686714B
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synchronization
terminal
synchronization level
synchronous
level
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CN106686714A (en
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周海军
赵丽
李媛媛
赵毅
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to PCT/CN2016/103293 priority patent/WO2017076195A1/en
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • 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
    • H04W56/00—Synchronisation arrangements

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

Abstract

The invention discloses a kind of clock synchronizing method, synchronizing information method and devices.It in the present invention, is synchronized for clock and defines two schemes, synchronization level is defined in every kind of clock synchronization scheme and enter the condition of different synchronization levels, to realize that clock is synchronous.In the present invention, for synchronizing information transmission plan, provide the following contents: if terminal receives the broadcast message of base station transmission, synchronous signal sequence is then obtained according to the broadcast message, otherwise, synchronous signal sequence is obtained from preconfigured synchronous signal sequence set according to the synchronization level of the terminal；The terminal determines the synchronization subframe for sending synchronizing information according to itself synchronization level.With this solution, synchronizing information transmission may be implemented, and isochronous resources conflict can be reduced.

Description

Clock synchronizing method, synchronizing information method and device
Technical field
The present invention relates to wireless communication field more particularly to clock synchronizing methods, synchronizing information method and device.
Background technique
Clock, which synchronizes, is of great significance to communication network.Transmitting terminal is when sending digital pulse signal, by digit pulse Signal is placed on specific time location (in i.e. specific time slot), and receiving end needs the pulse on specific time location It extracts and interprets, to guarantee the normal communication at transmitting-receiving both ends.This guarantee transmitting-receiving both ends can be correctly in a certain specific time position Upper extraction/transmission information function is realized by receiving and dispatching the timer clock at both ends.Therefore, the synchronous purpose of clock is to make The clock frequency and phase of each node are limited in predetermined range of tolerable variance in network, to avoid due to transmitting-receiving positioning Inaccuracy leads to the deterioration (such as error code, shake etc.) of transmission performance.
By taking D2D (Device-to-Device, device-to-device) communication system as an example, D2D communication system is a kind of short distance From communication service, it can be realized data in the direct transmission of terminal room.The combination of D2D communication system and cellular communication system, energy The spectrum efficiency for enough increasing cellular communication system, reduces terminal transmission power, shortens delay.It is logical in D2D communication system and honeycomb Under the scene that letter system combines, D2D terminal is same by the synchronizing information progress clock for receiving base station or the transmission of other D2D terminals Step.
How to be carried out for communication system in particular for the scene that D2D communication system is combined with cellular communication system The problem of clock is synchronous and further synchronizes information transmission, is current urgent need to resolve.
Summary of the invention
In a first aspect, some embodiments of the invention provide a kind of clock synchronizing method and device, to realize that clock is same Step.
A kind of clock synchronizing method that first aspect present invention embodiment provides, comprising:
If terminal receives the time signal of UTC system, the UTC system is subjected to clock as synchronisation source and is synchronized, And enter synchronization level 1；It otherwise,, will according to the grade of the synchronization signal if receiving synchronization signal in the first duration The terminal or base station for sending the synchronization signal carry out clock as synchronisation source and synchronize.
Preferably, it if described receive synchronization signal in the first duration, according to the grade of the synchronization signal, will send out It send the base station of the synchronization signal to carry out clock as synchronisation source to synchronize, comprising: if not receiving UTC system in the first duration Time signal, but receive synchronization level 0 base station send down-bound pilot frequency signal, then:
Using the base station of the synchronization level 0 as synchronisation source, it is timed based on range calibration or uplink synchronous calibration It is synchronous that clock is carried out on the basis of compensation, and enters synchronization level 2；Alternatively,
The base station is carried out clock as synchronisation source to synchronize, and according to the enabled mark of the timing-compensation of base station configuration Will, into synchronization level 2 or synchronization level 3, the timing-compensation enabler flags are used to indicate whether enabled timing-compensation；Its In, if timing-compensation is enabled, and the terminal is in the base for being timed compensation based on range calibration or uplink synchronous calibration The clock that carries out on plinth is synchronous, then the terminal enters synchronization level 2, otherwise enters synchronization level 3, if timing-compensation not by It is enabled, then enter synchronization level 2；
Wherein, the base station of the synchronization level 0 refers to: it is synchronous to have carried out clock with UTC system, and can be by descending pilot frequency The base station that the offset of signal and UTC clock is broadcasted.
Preferably, it if described receive synchronization signal in the first duration, according to the grade of the synchronization signal, will send The terminal of the synchronization signal carries out clock as synchronisation source and synchronizes, comprising:
If the synchronization signal that the terminal for receiving synchronization level 1 in the first duration is sent, by the synchronization level 1 Terminal carries out clock as synchronisation source and synchronizes, and enters synchronization level 2；Alternatively,
If the synchronization signal that the terminal for not receiving synchronization level 1 in the first duration is sent, but receive synchronization level 2 The synchronization signal that sends of terminal, then it is synchronous to carry out clock using the terminal of the synchronization level 2 as synchronisation source, and enter synchronization Grade 3；Alternatively,
If only receiving the synchronization signal of the transmission of synchronization level 3 in the first duration, connect according in N number of synchronizing cycle The synchronization signal of all synchronization levels 3 received carries out clock and synchronizes, or the synchronization that will be received in N number of synchronizing cycle In the source terminal of the synchronization signal of grade 3, it is synchronous that time forward terminal as synchronisation source carries out clock, and enters and synchronize Grade 3, wherein N is the integer more than or equal to 1；Wherein, the synchronization signal of the synchronization level 3 includes the terminal of synchronization level 3 And/or the synchronization signal that base station is sent, the base station of the synchronization level 3 refer to: the base station synchronous with UTC system progress clock Or the base station of self-position can not be obtained.
Preferably, further includes: if not receiving the time signal of UTC system in first duration, also do not receive The synchronization signal that base station or other terminals are sent, then in the second duration cut-off after the first duration, into synchronization level 3.
Preferably, further includes: if the synchronous letter that the terminal into synchronization level 1 receives base station or other terminals are sent Number, then it is synchronous as synchronisation source progress clock to abandon the base station that will send the synchronization signal or other terminals.
The embodiment of first aspect present invention additionally provides a kind of terminal, comprising: receiving module and synchronization module；
The synchronization module, if receiving the time signal of world concordant time UTC system for the receiving module, It is synchronous that clock is carried out using the UTC system as synchronisation source, and enters synchronization level 1；Otherwise, if described in the first duration connect It receives module and receives synchronization signal, then according to the grade of the synchronization signal, terminal or the base station of the synchronization signal will be sent It is synchronous that clock is carried out as synchronisation source.
Preferably, the synchronization module is specifically used for:
If the receiving module does not receive the time signal of UTC system in the first duration, but receives synchronization level 0 Base station send down-bound pilot frequency signal, then:
Using the base station of the synchronization level 0 as synchronisation source, it is timed based on range calibration or uplink synchronous calibration It is synchronous that clock is carried out on the basis of compensation, and enters synchronization level 2；Alternatively,
The base station is carried out clock as synchronisation source to synchronize, and according to the enabled mark of the timing-compensation of base station configuration Will, into synchronization level 2 or synchronization level 3, the timing-compensation enabler flags are used to indicate whether enabled timing-compensation；Its In, if timing-compensation is enabled, and the terminal is in the base for being timed compensation based on range calibration or uplink synchronous calibration The clock carried out on plinth is synchronous, then enters synchronization level 2, otherwise enters synchronization level 3, if timing-compensation is not enabled, into Enter synchronization level 2；
Wherein, the base station of the synchronization level 0 refers to: it is synchronous to have carried out clock with UTC system, and can be by descending pilot frequency The base station that the offset of signal and UTC clock is broadcasted.
Preferably, the synchronization module is specifically used for:
If the receiving module receives the synchronization signal that the terminal of synchronization level 1 is sent in the first duration, by institute The terminal for stating synchronization level 1 carries out clock as synchronisation source and synchronizes, and enters synchronization level 2；Alternatively,
If the receiving module does not receive the synchronization signal that the terminal of synchronization level 1 is sent in the first duration, but connects The synchronization signal that the terminal of synchronization level 2 is sent is received, then it is same to carry out clock using the terminal of the synchronization level 2 as synchronisation source Step, and enter synchronization level 3；Alternatively,
If the receiving module only receives the synchronization signal of the transmission of synchronization level 3 in the first duration, according to N number of The synchronization signal of all synchronization levels 3 received in synchronizing cycle carries out clock and synchronizes, or will be in N number of synchronizing cycle In the source terminal of the synchronization signal of the synchronization level 3 received, it is synchronous that time forward terminal as synchronisation source carries out clock, And enter synchronization level 3, wherein N is the integer more than or equal to 1；Wherein, the synchronization signal of the synchronization level 3 includes same The synchronization signal that the terminal and/or base station for walking grade 3 are sent, the base station of the synchronization level 3 refer to: not carrying out with UTC system The synchronous base station of clock or the base station that self-position can not be obtained.
Preferably, the synchronization module is also used to: if the receiving module does not receive UTC system in first duration The time signal of system does not receive the synchronization signal of base station or the transmission of other terminals, then in second after the first duration yet When long cut-off, into synchronization level 3.
Preferably, the synchronization module is also used to: if into the terminal of synchronization level 1 receiving module receive base station or The synchronization signal that other terminals are sent then is abandoned the base station that will send the synchronization signal or other terminals and is carried out as synchronisation source Clock is synchronous.
In the clock synchronization scheme that the embodiment of the above-mentioned first aspect of the present invention provides, if terminal receives UTC system It is synchronous then to carry out clock using the UTC system as synchronisation source, and enters synchronization level 1 for time signal；Otherwise, if at first Synchronization signal is received in length, then according to the grade of the synchronization signal, the terminal for sending the synchronization signal or base station are made It is synchronous that clock is carried out for synchronisation source.As can be seen that above-described embodiment, according to different situations, terminal can enter different synchronize Grade realizes that the clock of different accuracy is synchronous.
Second aspect, another kind clock synchronizing method and device provided in an embodiment of the present invention, to realize that clock is synchronous.
The clock synchronizing method that the embodiment of second aspect of the present invention provides, comprising:
If terminal receives the down-bound pilot frequency signal that the base station of synchronization level 0 is sent, by the base of the synchronization level 0 Standing, it is synchronous to carry out clock as synchronisation source, and enters synchronization level 1a；Otherwise, if receiving other terminals hair in the first duration The time signal of the synchronization signal or world concordant time UTC system sent, then according to the synchronization level of other terminals by institute Other terminals are stated to synchronize as synchronisation source or using the UTC system as synchronisation source progress clock.
Preferably, if the synchronization signal for receiving the transmission of other terminals in the first duration, according to it is described other Other described terminals are carried out clock as synchronisation source and synchronized by the synchronization level of terminal, comprising:
If the synchronization signal that the terminal for receiving synchronization level 1a in the first duration is sent, by the synchronization level 1a Terminal as synchronisation source to carry out clock synchronous, and enter synchronization level 3；Alternatively,
It is described to synchronize if only receiving the synchronization signal that terminal of the synchronization level not higher than 1 is sent in the first duration Grade includes the terminal of synchronization level 1 in the terminal not higher than 1, then when carrying out the terminal of the synchronization level 1 as synchronisation source Clock is synchronous, and enters synchronization level 2；Alternatively,
It is described to synchronize if only receiving the synchronization signal that terminal of the synchronization level not higher than 2 is sent in the first duration Grade includes the terminal of synchronization level 2 in the terminal not higher than 2, then when carrying out the terminal of the synchronization level 2 as synchronisation source Clock is synchronous, and enters synchronization level 3；Alternatively,
If the synchronization signal that the terminal for only receiving synchronization level 3 in the first duration is sent, according to N number of synchronizing cycle In the synchronization signal of all synchronization levels 3 that receives to carry out clock synchronous, or will be received in the N synchronizing cycle Synchronization level 3 synchronization signal source terminal in, it is synchronous that time forward terminal as synchronisation source carries out clock, and enters Synchronization level 3, wherein N is the integer more than or equal to 1.
Preferably, if the time signal for receiving UTC system in the first duration, using the UTC system as It is synchronous that synchronisation source carries out clock, comprising: if the synchronous letter that the terminal for not receiving synchronization level 1a in the first duration is sent Number, but receive the time signal of UTC system, then it is synchronous to carry out clock using the UTC system as synchronisation source, and enters and synchronize Grade 1.
Preferably, further includes: if not receiving the synchronization signal of base station or the transmission of other terminals in first duration, Then in the second duration cut-off after the first duration, into synchronization level 3.
The terminal that the embodiment of second aspect of the present invention provides, comprising: receiving module and synchronization module；
The synchronization module, if the descending pilot frequency letter sent for the base station that the receiving module receives synchronization level 0 Number, then it is synchronous clock to be carried out using the base station of the synchronization level 0 as synchronisation source, and enters synchronization level 1a；Otherwise, if The receiving module receives the synchronization signal of other terminals transmission or the time service letter of world concordant time UTC system in one duration Number, then according to synchronization level other terminals by described in of other terminals as synchronisation source or using the UTC system as same It is synchronous that step source carries out clock.
Preferably, the synchronization module is specifically used for:
If the receiving module receives the synchronization signal that the terminal of synchronization level 1a is sent in the first duration, by institute The terminal for stating synchronization level 1a carries out clock as synchronisation source and synchronizes, and enters synchronization level 3；Alternatively,
If the receiving module only receives the synchronous letter that terminal of the synchronization level not higher than 1 is sent in the first duration Number, the synchronization level not higher than 1 terminal in include synchronization level 1 terminal, then using the terminal of the synchronization level 1 as It is synchronous that synchronisation source carries out clock, and enters synchronization level 2；Alternatively,
If the receiving module only receives the synchronous letter that terminal of the synchronization level not higher than 2 is sent in the first duration Number, the synchronization level not higher than 2 terminal in include synchronization level 2 terminal, then using the terminal of the synchronization level 2 as It is synchronous that synchronisation source carries out clock, and enters synchronization level 3；Alternatively,
If the receiving module only receives the synchronization signal that the terminal of synchronization level 3 is sent, root in the first duration It is synchronous that clock is carried out according to the synchronization signal of all synchronization levels 3 received in N number of synchronizing cycle, or by N number of synchronization In the source terminal of the synchronization signal of the synchronization level 3 received in period, when time forward terminal is carried out as synchronisation source Clock is synchronous, and enters synchronization level 3, wherein N is the integer more than or equal to 1.
Preferably, the synchronization module is specifically used for: if the receiving module is not received and synchronized in the first duration The synchronization signal that the terminal of grade 1a is sent, but receive the time signal of UTC system, then using the UTC system as synchronisation source It is synchronous to carry out clock, and enters synchronization level 1.
Preferably, the synchronization module is also used to: if the receiving module does not receive base station in first duration Or the synchronization signal that other terminals are sent, then in the second duration cut-off after the first duration, into synchronization level 3.
In the clock synchronization scheme that the embodiment of the above-mentioned second aspect of the present invention provides, the base station of synchronization level 0 is received It is synchronous then to carry out clock using the base station as synchronisation source, and enters synchronization level 1a for the down-bound pilot frequency signal of transmission；Otherwise, if The synchronization signal of other terminals transmission or the time signal of UTC system are received in the first duration, then according to other described ends The synchronization level at end synchronizes other described terminals as synchronisation source or using the UTC system as synchronisation source progress clock.It can To find out, above-described embodiment can enter different synchronization levels, realize that the clock of different accuracy is same according to different situations, terminal Step.
The third aspect, the embodiment of the invention also provides a kind of clock synchronizing method and devices, to reduce isochronous resources Conflict.
The synchronizing information method that the embodiment of third aspect present invention provides, comprising:
Terminal obtains synchronous signal sequence to be sent；Wherein, if the terminal receives the broadcast message of base station transmission, Synchronous signal sequence is then obtained according to the broadcast message, otherwise, according to the synchronization level of the terminal from preconfigured same Synchronous signal sequence is obtained in step signal sequence set；
The terminal determines the synchronization subframe for sending synchronizing information according to the synchronization level of the terminal；
The terminal sends synchronizing information in the synchronization subframe determined, includes getting in transmitted synchronizing information Synchronous signal sequence.
It preferably, include N number of subset in the preconfigured synchronous signal sequence set, N is whole more than or equal to 3 Number, different synchronization levels correspond to different subsets；
The synchronization level according to the terminal obtains synchronization signal from preconfigured synchronous signal sequence set Sequence, comprising:
If the synchronization level of the terminal is 1, one to make an appointment is chosen from subset corresponding with synchronization level 1 Synchronous signal sequence；Alternatively,
If the synchronization level of the terminal is 2, selection one is made an appointment same from the corresponding subset of synchronization level 2 Walk signal sequence；Alternatively,
If the synchronization level of the terminal is 3, and is synchronized in entrance not synchronous with any synchronisation source progress clock Grade 3, then a synchronous signal sequence is chosen from the corresponding subset of synchronization level 3, if the synchronization level of the terminal is 3, And be with synchronization level not less than synchronization level 3 synchronisation source carry out clock it is synchronous enter synchronization level 3, then according to it is described together Step source obtains synchronous signal sequence identical or corresponding with the synchronous signal sequence that the synchronisation source is sent.
Wherein, if the synchronization level of the terminal be 3, and be with synchronization level not less than synchronization level 3 synchronisation source into Row clock is synchronous entering synchronization level 3, then the synchronous signal sequence sent with the synchronisation source is obtained according to the synchronisation source Identical or corresponding synchronous signal sequence, comprising:
If the synchronization level of the terminal is 3, and is carried out using synchronization level 2 or the terminal of synchronization level 1a as synchronisation source Clock is synchronous entering synchronization level 3, then is sent according to the terminal of the synchronization level 2 or synchronization level 1a as synchronisation source The first synchronous signal sequence, choose the second synchronous signal sequence from the corresponding subset of synchronization level 3；Wherein, first is synchronous The corresponding relationship of signal sequence and the second synchronous signal sequence is made an appointment；Alternatively,
If the synchronization level of the terminal is 3, and the terminal of synchronization level 3 is carried out clock as synchronisation source and enters synchronization Grade 3, then using as synchronous signal sequence transmitted by the terminal of the synchronization level 3 of synchronisation source as described to be sent Synchronous signal sequence.
It wherein, if the synchronization level of the terminal is 3, and is to carry out clock for the terminal of synchronization level 1a as synchronisation source It is synchronous entering synchronization level 3, then the first synchronization signal sent according to the terminal of the synchronization level 1a as synchronisation source Sequence chooses the second synchronous signal sequence, first synchronous signal sequence and described from the corresponding subset of synchronization level 3 The corresponding relationship of two synchronous signal sequences is pre-configured with or arranges；
Second synchronous signal sequence the synchronization level 1a synchronization signal occupy synchronization subframe after one It is sent in a synchronous subframe.
Preferably, the first synchronous subframe, the second synchronous subframe, the synchronous subframe totally 3 of third are included in a synchronizing cycle Synchronous subframe, the first synchronous subframe correspond to synchronization level 1 and synchronization level 3, and the second synchronous subframe corresponds to synchronization level 2, third Synchronous subframe corresponds to synchronization level 3；
Synchronization level of the terminal according to the terminal, determining synchronous subframe work corresponding with the synchronization level of the terminal For the synchronization subframe for sending synchronizing information, comprising:
If the synchronization level of the terminal is synchronization level 1, it is determined that the first synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 2, it is determined that the second synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 3, and the synchronization that the terminal that can receive synchronization level 2 is sent Signal, it is determined that the synchronous subframe of third is as the synchronization subframe for sending synchronizing information；Otherwise, it determines the first synchronous subframe or third Synchronous subframe is as the synchronization subframe for sending synchronizing information.
Preferably, in a synchronizing cycle comprising the first synchronous subframe subframe synchronous with second totally 2 synchronous subframes, first Synchronous subframe corresponds to synchronization level 1 and synchronization level 3, and the second subframe corresponds to synchronization level 2 and synchronization level 3；
Synchronization level of the terminal according to the terminal, determining synchronous subframe work corresponding with the synchronization level of the terminal For the synchronization subframe for sending synchronizing information, comprising:
If the synchronization level of the terminal is synchronization level 1, it is determined that the first synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 2, it is determined that the second synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 3, and the synchronization that the terminal that can receive synchronization level 2 is sent Signal, it is determined that the first synchronous subframe is as the synchronization subframe for sending synchronizing information；Otherwise, it determines the first synchronous subframe or second Subframe is as the synchronization subframe for sending synchronizing information.
Preferably, in a synchronizing cycle comprising the first synchronous subframe subframe synchronous with second totally 2 synchronous subframes, first Synchronous subframe corresponds to synchronization level 1, and the second synchronous subframe corresponds to synchronization level 2；
Synchronization level of the terminal according to the terminal, determining synchronous subframe work corresponding with the synchronization level of the terminal For the synchronization subframe for sending synchronizing information, comprising:
If the synchronization level of the terminal is synchronization level 1, it is determined that the first synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 2, it is determined that the second synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is 3, abandon sending synchronizing information.
Preferably, the pre-set synchronous signal sequence set includes N number of subset, and N is the integer more than or equal to 3, Different synchronization levels corresponds to different subsets；
The instruction information of synchronous signal sequence is carried in the broadcast message that the base station is sent, in which:
Synchronization level 1 or the corresponding synchronous signal sequence of synchronization level 1a are chosen from the corresponding subset of synchronization level 1 's；
The corresponding synchronous signal sequence of synchronization level 2 is chosen from the corresponding subset of synchronization level 2；
The corresponding synchronous signal sequence of synchronization level 3 is chosen from the corresponding subset of synchronization level 3.
Wherein, the subset quantity for including in the preconfigured synchronous signal sequence set is 3,3 subsets point Synchronization level 1, synchronization level 2 and synchronization level 3 are not corresponded to, the quantity of synchronous signal sequence in the corresponding subset of synchronization level 3 Not less than the quantity of synchronous signal sequence in the corresponding subset of synchronization level 2；Alternatively,
It include the first subset and second subset in the preconfigured synchronous signal sequence set, the first subset includes 2 A subset, respectively corresponds synchronization level 1 and synchronization level 2, and second subset corresponds to synchronization level 3, synchronization signal in second subset Quantity of the quantity of sequence not less than synchronous signal sequence in the first subset.
It preferably, further include PBSCH content in the synchronizing information that the terminal is sent；Wherein, if the terminal receives The broadcast message that base station is sent, then the PBSCH content that the terminal is sent is obtained from the broadcast message, otherwise, institute It is preconfigured for stating the PBSCH content of terminal transmission；Alternatively,
It further include PBSCH content in the synchronizing information that the terminal is sent；Wherein, if the terminal does not receive base station hair The synchronization signal that the terminal for broadcasting the message and also not receiving synchronization level 1a sent is sent, the then PBSCH that the terminal is sent Content is preconfigured, if the terminal does not receive the broadcast message of base station but receives the terminal transmission of synchronization level 1a Synchronization signal, then the PBSCH content that the terminal is sent is from the synchronization signal that the terminal of the synchronization level 1a is sent It obtains, if the terminal receives the broadcast message of base station transmission, the PBSCH content that the terminal is sent is sent out from base station It is obtained in the broadcast message sent.
Preferably, further includes: if the terminal detects used in its used isochronous resources and other terminals together Step resource clashes, then the new idle subframe of the terminal selection sends synchronizing information.
In the clock synchronization scheme that the above embodiment of the present invention provides, if the base station that terminal receives synchronization level 0 is sent Down-bound pilot frequency signal, then it is synchronous to carry out clock using the base station of synchronization level 0 as synchronisation source, and enter synchronization level 1a；It is no Then, if receiving the synchronization signal of other terminals transmission or the time signal of UTC system in the first duration, by this other Terminal or UTC system carry out clock as synchronisation source and synchronize.As can be seen that above-described embodiment is according to different situations, terminal can be with Into different synchronization levels, realize that the clock of different accuracy is synchronous.
A kind of terminal that the embodiment of third aspect present invention provides, comprising:
Module is obtained, for obtaining synchronous signal sequence to be sent；Wherein, if the terminal receives base station transmission Broadcast message, then according to broadcast message acquisition synchronous signal sequence, otherwise, according to the synchronization level of the terminal from preparatory Synchronous signal sequence is obtained in the synchronous signal sequence set of configuration；
Determining module determines the synchronization subframe for sending synchronizing information for the synchronization level according to the terminal；
Sending module includes in transmitted synchronizing information for sending synchronizing information in the synchronization subframe determined The synchronous signal sequence got.
It preferably, include N number of subset in the preconfigured synchronous signal sequence set, N is whole more than or equal to 3 Number, different synchronization levels correspond to different subsets；
The acquisition module is specifically used for:
If the synchronization level of the terminal is 1, one to make an appointment is chosen from subset corresponding with synchronization level 1 Synchronous signal sequence；Alternatively,
If the synchronization level of the terminal is 2, selection one is made an appointment same from the corresponding subset of synchronization level 2 Walk signal sequence；Alternatively,
If the synchronization level of the terminal is 3, and is synchronized in entrance not synchronous with any synchronisation source progress clock Grade 3, then a synchronous signal sequence is chosen from the corresponding subset of synchronization level 3, if the synchronization level of the terminal is 3, And be with synchronization level not less than synchronization level 3 synchronisation source carry out clock it is synchronous enter synchronization level 3, then according to it is described together Step source obtains synchronous signal sequence identical or corresponding with the synchronous signal sequence that the synchronisation source is sent.
Wherein, the acquisition module is specifically used for:
If the synchronization level of the terminal is 3, and is carried out using synchronization level 2 or the terminal of synchronization level 1a as synchronisation source Clock is synchronous entering synchronization level 3, then is sent according to the terminal of the synchronization level 2 or synchronization level 1a as synchronisation source The first synchronous signal sequence, choose the second synchronous signal sequence from the corresponding subset of synchronization level 3；Wherein, first is synchronous The corresponding relationship of signal sequence and the second synchronous signal sequence is made an appointment；Alternatively,
If the synchronization level of the terminal is 3, and the terminal of synchronization level 3 is carried out clock as synchronisation source and enters synchronization Grade 3, then using as synchronous signal sequence transmitted by the terminal of the synchronization level 3 of synchronisation source as described to be sent Synchronous signal sequence.
Wherein, the acquisition module is specifically used for:
If the synchronization level of the terminal is 3, and is that the terminal of synchronization level 1a is carried out clock as synchronisation source to synchronize Into synchronization level 3, then the first synchronous signal sequence sent according to the terminal of the synchronization level 1a as synchronisation source, The second synchronous signal sequence is chosen from the corresponding subset of synchronization level 3, first synchronous signal sequence and described second is together The corresponding relationship of step signal sequence is pre-configured with or arranges；
The determining module is specifically used for: when determining the synchronization subframe for sending synchronizing information, by the synchronization level 1a Synchronization signal occupy synchronization subframe after a synchronous subframe, be determined as this terminal transmission synchronizing information same step Frame.
Preferably, the first synchronous subframe, the second synchronous subframe, the synchronous subframe totally 3 of third are included in a synchronizing cycle Synchronous subframe, the first synchronous subframe correspond to synchronization level 1 and synchronization level 3, and the second synchronous subframe corresponds to synchronization level 2, third Synchronous subframe corresponds to synchronization level 3；
The determining module is specifically used for:
If the synchronization level of the terminal is synchronization level 1, it is determined that the first synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 2, it is determined that the second synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 3, and the synchronization that the terminal that can receive synchronization level 2 is sent Signal, it is determined that the synchronous subframe of third is as the synchronization subframe for sending synchronizing information；Otherwise, it determines the first synchronous subframe or third Synchronous subframe is as the synchronization subframe for sending synchronizing information.
Preferably, in a synchronizing cycle comprising the first synchronous subframe subframe synchronous with second totally 2 synchronous subframes, first Synchronous subframe corresponds to synchronization level 1 and synchronization level 3, and the second subframe corresponds to synchronization level 2 and synchronization level 3；
The determining module is specifically used for:
If the synchronization level of the terminal is synchronization level 1, it is determined that the first synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 2, it is determined that the second synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 3, and the synchronization that the terminal that can receive synchronization level 2 is sent Signal, it is determined that the first synchronous subframe is as the synchronization subframe for sending synchronizing information；Otherwise, it determines the first synchronous subframe or second Subframe is as the synchronization subframe for sending synchronizing information.
Preferably, in a synchronizing cycle comprising the first synchronous subframe subframe synchronous with second totally 2 synchronous subframes, first Synchronous subframe corresponds to synchronization level 1, and the second synchronous subframe corresponds to synchronization level 2；
The determining module is specifically used for:
If the synchronization level of the terminal is synchronization level 1, it is determined that the first synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 2, it is determined that the second synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is 3, abandon sending synchronizing information.
Preferably, the pre-set synchronous signal sequence set includes N number of subset, and N is the integer more than or equal to 3, Different synchronization levels corresponds to different subsets；
The instruction information of synchronous signal sequence is carried in the broadcast message that the base station is sent, in which:
Synchronization level 1 or the corresponding synchronous signal sequence of synchronization level 1a are chosen from the corresponding subset of synchronization level 1 's；
The corresponding synchronous signal sequence of synchronization level 2 is chosen from the corresponding subset of synchronization level 2；
The corresponding synchronous signal sequence of synchronization level 3 is chosen from the corresponding subset of synchronization level 3.
Preferably, the subset quantity for including in the preconfigured synchronous signal sequence set is 3,3 subsets Synchronization level 1, synchronization level 2 and synchronization level 3 are respectively corresponded, the number of synchronous signal sequence in the corresponding subset of synchronization level 3 Quantity of the amount not less than synchronous signal sequence in the corresponding subset of synchronization level 2；Alternatively,
It include the first subset and second subset in the preconfigured synchronous signal sequence set, the first subset includes 2 A subset, respectively corresponds synchronization level 1 and synchronization level 2, and second subset corresponds to synchronization level 3, synchronization signal in second subset Quantity of the quantity of sequence not less than synchronous signal sequence in the first subset.
It preferably, further include PBSCH content in the synchronizing information that the terminal is sent；Wherein, if the terminal receives The broadcast message that base station is sent, then the PBSCH content that the terminal is sent is obtained from the broadcast message, otherwise, institute It is preconfigured for stating the PBSCH content of terminal transmission；Alternatively,
It further include PBSCH content in the synchronizing information that the terminal is sent；Wherein, if the terminal does not receive base station hair The synchronization signal that the terminal for broadcasting the message and also not receiving synchronization level 1a sent is sent, the then PBSCH that the terminal is sent Content is preconfigured, if the terminal does not receive the broadcast message of base station but receives the terminal transmission of synchronization level 1a Synchronization signal, then the PBSCH content that the terminal is sent is from the synchronization signal that the terminal of the synchronization level 1a is sent It obtains, if the terminal receives the broadcast message of base station transmission, the PBSCH content that the terminal is sent is sent out from base station It is obtained in the broadcast message sent.
Preferably, the determining module is also used to: if detecting isochronous resources used in the terminal and other terminals Used isochronous resources clash, then new idle subframe is selected to send synchronizing information.
In the synchronizing information transmission plan that the embodiment of the above-mentioned third aspect of the present invention provides, on the one hand, terminal is obtaining When synchronous signal sequence to be sent, if terminal receives the broadcast message of base station transmission, obtained according to the broadcast message Otherwise synchronous signal sequence obtains synchronization according to the synchronization level of the terminal from preconfigured synchronous signal sequence set Signal sequence, to determine the synchronous signal sequence that terminal needs to send according to the network coverage situation of terminal；On the other hand, eventually When end determines the synchronization subframe for sending synchronizing information, it can be determined according to the synchronization level of itself to determine used same step Frame, that is to say, that may exist corresponding relationship between synchronization level and synchronous subframe, so that the terminal of different synchronization levels Different synchronization subframes can be used and send synchronizing information, and then isochronous resources conflict can be reduced.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings His attached drawing.
Fig. 1 is the flow diagram of clock synchronization scheme one provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of clock synchronization scheme two provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of synchronizing information transmission flow provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram for the frequency domain resource that synchronizing information provided in an embodiment of the present invention occupies；
Fig. 5 is terminal structure schematic diagram provided in an embodiment of the present invention；
Fig. 6 be another embodiment of the present invention provides terminal structure schematic diagram；
Fig. 7 be another embodiment of the present invention provides terminal structure schematic diagram；
Fig. 8 be another embodiment of the present invention provides terminal structure schematic diagram；
Fig. 9 be another embodiment of the present invention provides terminal structure schematic diagram；
Figure 10 be another embodiment of the present invention provides terminal structure schematic diagram.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into It is described in detail to one step, it is clear that the described embodiments are only some of the embodiments of the present invention, rather than whole implementation Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts All other embodiment, shall fall within the protection scope of the present invention.
It is of great significance as previously mentioned, clock is synchronized to communication network, especially in D2D communication system and cellular communication system It unites under the scene combined, the honeycomb coverage condition of terminal is varied, therefore influence of the clock synchronization scheme to communication performance is just It becomes more important.
By taking the car networking system in D2D communication system as an example, car networking system is utilized using vehicle as basic information unit (BIU) Wireless sensor networks, information acquiring technology, access technology, transmission technology, networking technology feel road and traffic comprehensively Know, realize a wide range of, Large Volume Data interaction between multiple systems, to provide the network of traffic efficiency and traffic safety and answer With.Car networking has nodal properties, mobility and data flow characteristic.It is fast that its mobility shows as network topology change, The features such as node motion speed is fast.In terminal high-speed moving process, it is possible that part terminal is in cellular coverage Interior, part terminal is in outside honeycomb covering, and part terminal is in honeycomb covering edge, that is, terminal in covering may be present, partially cover Lid terminal, the outer terminal of covering.
Wherein, terminal, part covering terminal, the relevant explanation of the outer terminal of covering are as follows in covering:
Terminal in covering: terminal is capable of the broadcast message of the unsuccessful demodulation Cellular Networks in the covering of a Cellular Networks.
Part covering terminal: the part covering terminal of a Cellular Networks is unable to the broadcast message of the unsuccessful demodulation Cellular Networks, But can receive the Cellular Networks cover in synchronization signal transmitted by terminal and can be whole in the covering of the unsuccessful demodulation Cellular Networks The transmitted Physical Broadcast Channel in end.
Cover outer terminal: the outer terminal of the covering of a Cellular Networks is unable to the broadcast message of the unsuccessful demodulation Cellular Networks, also not The Cellular Networks can be received to cover synchronization signal transmitted by interior terminal or be unable to terminal institute in the covering of the unsuccessful demodulation Cellular Networks The Physical Broadcast Channel of transmission.For example, covering the case where outer terminal receives synchronizing information may include: to be only capable of receiving portion The synchronization signal and Physical Broadcast Channel that terminal is sent are covered, or is only capable of receiving the synchronization signal and object for covering that outer terminal is sent Broadcast channel is managed, or synchronization signal and Physical Broadcast Channel that any terminal is sent can not be received.
The embodiment of the invention provides " clock synchronization schemes " and " synchronizing information transmission plan ", wherein " clock is synchronous Scheme " gives the definition of synchronization level and how to carry out clock and synchronizes, and " synchronizing information transmission plan " gives terminal such as What, which is determined, needs the content of the synchronizing information sent, and how to distribute the transfer resource of synchronizing information.Above two scheme can With (such as the definition for the synchronization level being related in " synchronizing information transmission plan ", in " clock synchronization scheme " independently of one another The definition of synchronization level can not be identical), can also related (for example what is be related in " synchronizing information transmission plan " synchronizes The definition of grade, identical as the definition of synchronization level in " clock synchronization scheme ").
In the specific implementation, the synchronization that sub-frame level can be first realized according to " clock synchronization scheme ", then according still further to " synchronous to believe Breath transmission plan " realizes the transmission of synchronizing information.Separately below to " clock synchronization scheme " and " synchronizing information transmission plan " It is described.
The embodiment of the present invention is applicable to the different types of communication system for needing clock synchronous, and it is logical to be particularly suitable for D2D System architecture of the letter system in conjunction with cellular communication system.
In the following description, under the scene that D2D communication system is combined with cellular communication, to of the invention real The specific implementation process for applying example is described, if not special declaration, terminal involved in following embodiments is D2D terminal. Certainly, following specific implementation processes is equally applicable to the communication system of other types or framework.
Clock synchronization scheme provided in an embodiment of the present invention is described first below.In general, the embodiment of the present invention mentions Two kinds of clock synchronization schemes (clock synchronization scheme one and clock synchronization scheme two described as follows), the different clock sides of synchronization are supplied Case gives different synchronization level definition and clock synchronization mode.Base station can instruction terminal use which kind of clock side of synchronization Case, terminal can also arrange the clock synchronization scheme using system agreement according to system.Which kind of is being used by base station instruction terminal In the case where clock synchronization scheme, base station can send enabler flags to terminal by broadcast message, which is used to refer to Which kind of clock synchronization scheme is terminal use.For example, enabler flags are expressed as G, indicated if G=1 using clock synchronization scheme one, If G=0, then it represents that use clock synchronization scheme two.
(1) clock synchronization scheme one
4 kinds of synchronization levels are defined in clock synchronization scheme one, according to the sequence of synchronization level from high to low, this 4 kinds same Walk ranking score also known as are as follows: synchronization level 0, synchronization level 1, synchronization level 2 and synchronization level 3.Wherein, synchronization level 0 can be Base station is exclusive, and synchronization level 1 and synchronization level 2 can be that terminal is exclusive, and synchronization level 3, which can be used for base station, to be used In terminal.Under normal circumstances, synchronization level is higher, then synchronization accuracy is higher.
It should be noted that the naming method of above-mentioned 4 kinds of synchronization levels is only a kind of example, the embodiment of the present invention also allows It is known as second using other names mode, such as by above-mentioned synchronization level 1 referred to as the first synchronization level, by above-mentioned synchronization level 2 Synchronization level, and so on, it will not enumerate herein.
(1) synchronization level 0
If base station and UTC (Universal Time Coordinated, zebra time coordinate) system have carried out clock It is synchronous, and down-bound pilot frequency signal and the offset of UTC clock can be broadcasted, for example, system broadcast message can be passed through Notify the offset of down-going synchronous clock and UTC clock, then due to the crystal oscillator of base station has stability high and transmission power greatly Feature, so base station can cover lower terminal one clock that coverage area is big, stability is high of offer and frequency to honeycomb The synchronization level of base station is defined as grade 0 at this time by synchronisation source.
(2) synchronization level 1
If terminal can receive the time signal of UTC system, and carry out clock using the UTC system as synchronisation source Synchronous, then the synchronization level of the terminal is synchronization level 1.
Further, if the synchronization signal that the terminal into synchronization level 1 receives base station or other terminals are sent, puts As synchronisation source to carry out clock synchronous for the base station for sending the synchronization signal or other terminals of outcasting the soldier.That is, satellite can be passed through Equal UTC time dissemination system obtains the terminal of UTC clock without obtaining its tranmitting data register by base station, only with the UTC time service such as satellite System is as its clock source.
(3) synchronization level 2
In a scenario, if terminal receives the down-bound pilot frequency signal that the base station of synchronization level 0 is sent, and the terminal Using the base station as synchronisation source, clock has been carried out on the basis of being timed compensation based on range calibration or uplink synchronous calibration Synchronous, then the synchronization level of the terminal is synchronization level 2.
Under another scene, timing-compensation enabler flags are configured in terminal, for convenience of description, below by timing-compensation Enabler flags are described as TC.TC can be base station and be allocated to terminal, be also possible to system agreement.TC is used to indicate terminal and exists Carry out clock it is synchronous when whether the operation of enabled timing-compensation, for example, indicate that timing-compensation is enabled when TC=0, when TC=1 Indicate that timing-compensation is not enabled.In this case, if the descending pilot frequency letter that the base station that terminal receives synchronization level 0 is sent Number, then:
In the case where timing-compensation is enabled, if terminal can be carried out based on range calibration or uplink synchronous calibration It is synchronous that clock is carried out on the basis of timing-compensation, and using the base station of the synchronization level 0 as synchronisation source, is mended based on above-mentioned timing It is synchronous that clock is carried out on the basis of repaying, then the synchronization level of the terminal is 2；Otherwise, if terminal can not be based on above-mentioned fixed When compensation on the basis of to carry out clock synchronous, but carried out general clock for the base station of the synchronization level 0 as synchronisation source Synchronous (not carrying out above-mentioned timing-compensation), then the synchronization level of the terminal is 3；
In the case where timing-compensation is not enabled, when terminal has carried out the base station of the synchronization level 0 as synchronisation source After clock synchronizes, the synchronization level of the terminal is 2.
Wherein, the mode of timing-compensation may include compensation being timed based on range calibration, and be based on uplink synchronous school Standard is timed compensation.Wherein, after the timing-compensation based on range calibration, terminal transmission clock t0 is equal to received base station The clock t1- τ 1 of signal, whereinL ' bu is that (base station is in system broadcast message for the estimated distance of terminal to base station The coordinate position for notifying base station, in terminal location it is also known that in the case where can find out the space length of terminal to base station), C It is the light velocity；Terminal under base station covers cannot achieve positioning, then can not carry out the calibration based on distance, but work as itself and network When establishing uplink synchronous, terminal transmission clock t0 is equal to the clock t1-TA/2 of received base station signal, wherein assuming that t2 is bee Nest uplink tranmitting data register, then TA=t1-t2.
Under another scene, if terminal receives the synchronization signal that the terminal of synchronization level 1 is sent, and by the synchronization The terminal of grade 1 has carried out clock as synchronisation source and has synchronized, then the synchronization level of the terminal is synchronization level 2.
(4) synchronization level 3
It, should if base station is synchronous with UTC system progress clock or can not obtain self-position for base station The synchronization level of base station is 3.Wherein, the radio-frequency antenna of base station can nearby place GNSS (Global Navigation Satellite System, Global Navigation Satellite System or Global Satellite Navigation System), so as to obtain it by GNSS Location information.If base station does not configure the equipment such as GNSS, the location information of itself can not be obtained.
As described above, at the terminal under the scene configured with timing-compensation enabler flags TC, if terminal receives synchronization The down-bound pilot frequency signal that the base station of grade 0 is sent, then in the case where timing-compensation is enabled, if terminal can not be based on upper Progress clock is synchronous on the basis of stating timing-compensation, but has carried out using the base station of the synchronization level 0 as synchronisation source general Clock is synchronous (not carrying out above-mentioned timing-compensation), then the synchronization level of the terminal is 3.
Under another scene, if terminal receives the synchronization signal that the terminal of synchronization level 2 is sent, and by the synchronization The terminal of grade 2 has carried out clock as synchronisation source and has synchronized, then the synchronization level of the terminal is synchronization level 3.
Under another scene, if terminal only receives the synchronization signal of the transmission of synchronization level 3, and according to N number of (N For the integer more than or equal to 1) synchronization signal of synchronization level 3 that receives in synchronizing cycle carried out motor synchronizing, then end The synchronization level at end is synchronization level 3.Wherein, the synchronization signal of the synchronization level 3 include synchronization level 3 terminal and/or The synchronization signal that the base station of synchronization level 3 is sent.
Wherein it is preferred to which self synchronous mode may include following two:
Motor synchronizing mode 1: by the reception of the synchronization signal of all synchronization levels 3 received in above-mentioned N number of synchronizing cycle Clock, which is weighted, sums and the result averaged is as tranmitting data register.
For example, within N number of synchronizing cycle, terminal i has received the synchronization signal that the terminal of K synchronization level 3 is sent, Then terminal i sends starting point T as reference data, with the reception starting point Tx of other terminals 1ms data using the 1ms data of this terminal It is made the difference with T, and modulo operation is carried out to difference and 1ms, obtain the normalization clock tx of the terminal of the K synchronization level 3 (i.e. T1, t2, t3 ... tk, wherein the normalization clock difference of terminal i is t0=0):
Tx=Mod (Tx-T, 1ms) ... ... ... ... ... ... (1)
Then, terminal i calculates the tranmitting data register adjustment amount △ i of this terminal according to the following formula, to be adjusted according to △ i The local clock of terminal i:
Wherein, ax is the weight of clock adjustment amount, and ax can be the reception power of respective synchronization signal.A0 can takeWherein R >=0 adjusts rate by the clock that R can control terminal, and specific value can be determined by emulation.
In this way, in the case where terminal i is only capable of receiving the synchronization signal of synchronization level 3, it is every to pass through N number of synchronizing cycle, The tranmitting data register of terminal i is adjusted in the manner described above, and further can adjust speed by the clock of the value controlling terminal of R Rate, so that clock synchronization accuracy can be improved as much as possible in the case where high synchronization level synchronisation source can not be obtained.
Motor synchronizing mode 2: by the source terminal of the synchronization signal of the synchronization level 3 received in above-mentioned N number of synchronizing cycle In, it is synchronous that time forward terminal as synchronisation source carries out clock.
In another scene, if terminal does not receive the synchronization signal that base station or other terminals are sent, set at this After postponing a period of time length again after timing is long, into synchronization level 3.The time span of required delay can make an appointment or It is configured by base station, the value of the time span can as needed or system emulation or experience determine.
In above-mentioned clock synchronization scheme one, if terminal can receive base station or other terminals or UTC system is sent Synchronization signal, then it is synchronous to carry out clock according to following principle: when the terminal of low synchronization level receives the same of high synchronization level When walking signal, clock is carried out according to the synchronization signal of the high synchronization level received and is synchronized, for example, by the synchronization of high synchronization level Tranmitting data register of the reception clock of signal as this terminal.More preferably, can synchronization signal to the high synchronization level received into The timing-compensation that row is calibrated based on range calibration or uplink synchronous, by the synchronization signal of the high synchronization level after timing-compensation Receive tranmitting data register of the clock as this terminal.
For example, if terminal has received and synchronizes in the case where that can not receive the time signal of UTC system The down-bound pilot frequency signal that the base station of grade 0 is sent, and the synchronization signal that the terminal for having received synchronization level 1 is sent, the then terminal It is synchronous to enter synchronization level 2 that clock preferentially is carried out using the base station of synchronization level 0 as synchronisation source.It further, if cannot It is synchronous that clock is carried out with the base station of synchronization level 0, then is carried out clock using the terminal of synchronization level 1 as synchronisation source and synchronized.
For the sake of clarity, Fig. 1 shows a kind of implementation process of clock synchronization scheme one.On the whole, the process institute In the clock synchronization scheme one of description, if terminal receives the time signal of UTC system, using the UTC system as synchronisation source It is synchronous to carry out clock, and enters synchronization level 1；Otherwise, if receiving synchronization signal in the first duration, believed according to the synchronization Number grade, it is synchronous to carry out clock using the terminal for sending the synchronization signal or base station as synchronisation source.
Specifically, as shown in Figure 1, in a step 101, starting timer d1, the timing of timer d1 after terminal booting Shi Changwei t1 (i.e. above-mentioned first duration).
It, can be according to following steps under the reception condition of synchronization signal in the timing time of timer d1:
If receiving the time signal of UTC system, the UTC system is subjected to clock as synchronisation source and is synchronized, is gone forward side by side Enter synchronization level 1 (see step 102~step 103)；
Otherwise, if the down-bound pilot frequency signal that the base station for receiving synchronization level 0 is sent, in TC=1, (i.e. timing-compensation is not It is enabled) in the case where, the base station of the synchronization level 0 is carried out clock as synchronisation source and synchronized by terminal, and enters synchronization level 2；In the case where TC=0 (i.e. timing-compensation is enabled), if terminal as synchronisation source and has carried out the base station based on timing The clock synchronization of compensation, then enter synchronization level 3, if the base station as synchronisation source and has been carried out clock synchronization by the terminal, but The clock, which synchronizes, is not based on timing-compensation, then enters synchronization level 3 (see step 104~step 107)；
Otherwise, if receive synchronization level 1 terminal send synchronization signal, using the terminal of the synchronization level 1 as It is synchronous that synchronisation source carries out clock, and enters synchronization level 2 (see step 108~step 109)；
Otherwise, if receive synchronization level 2 terminal send synchronization signal, using the terminal of the synchronization level 2 as It is synchronous that synchronisation source carries out clock, and enters synchronization level 3 (see step 110~step 111)；
Otherwise, if the down-bound pilot frequency signal that the base station for receiving synchronization level 3 is sent, by the base station of the synchronization level 3 It is synchronous that clock is carried out as synchronisation source, and enters synchronization level 3 (see step 112~step 113)；
Otherwise, if receive synchronization level 3 terminal send synchronization signal, according to the terminal of the synchronization level 3 into Row motor synchronizing, and enter synchronization level 3 (see step 114~step 115)；
Otherwise, if timer d1 time-out, start timer d2 after timer d1 time-out, after timer d2 time-out Into synchronization level 3 (see step 116~step 117).
It should be noted that the terminal of synchronization level 3 can be thought having the same synchronous with the base station of synchronization level 3 Grade, step 112~step 115 in process above-mentioned so also can be described as: if terminal receives the synchronization of synchronization level 3 Signal, then no matter the synchronization signal of the synchronization level 3, which is derived from base station, is also derived from other terminals, all in accordance with self synchronous It is synchronous that mode carries out clock, and enters synchronization level 3.
By the above-mentioned description to clock synchronization scheme one as can be seen that if terminal receives the time signal of UTC system, It is synchronous that clock then is carried out using the UTC system as synchronisation source, and enters synchronization level 1；Otherwise, if being received in the first duration Synchronization signal, then according to the grade of the synchronization signal, using send the synchronization signal terminal or base station as synchronisation source into Row clock is synchronous.As can be seen that above-described embodiment, according to different situations, terminal can enter different synchronization levels, realize not It is synchronous with the clock of precision.
(2) clock synchronization scheme two
5 kinds of synchronization levels are defined in clock synchronization scheme two, according to the sequence of synchronization level from high to low, this 5 kinds same Walk ranking score also known as are as follows: synchronization level 0, synchronization level 1a, synchronization level 1, synchronization level 2 and synchronization level 3.Wherein, synchronous Grade 0 can be that base station is exclusive, and it is exclusive that synchronization level 1a, synchronization level 1, synchronization level 2 and synchronization level 3 can be terminal 's.Under normal circumstances, synchronization level is higher, then synchronization accuracy is higher.
It should be noted that the naming method of above-mentioned 5 kinds of synchronization levels is only a kind of example, the embodiment of the present invention also allows It is known as second using other names mode, such as by above-mentioned synchronization level 1 referred to as the first synchronization level, by above-mentioned synchronization level 2 Synchronization level, and so on, it will not enumerate herein.
It is further to note that having the life of part synchronization level in synchronization level defined in clock synchronization scheme two Name is identical as the name of synchronization level in above-mentioned synchronization scheme one, but its meaning should be with the definition in corresponding clock synchronization scheme Standard explains.
(1) synchronization level 0
The synchronization level default configuration of base station is synchronization level 0.
(2) synchronization level 1a
If terminal can receive the down-bound pilot frequency signal that the base station of synchronization level 0 is sent, and using the base station as same Step source has carried out clock and has synchronized, then the synchronization level of the terminal is synchronization level 1a.
(3) synchronization level 1
In a scenario, if terminal can not receive the down-bound pilot frequency signal that the base station of synchronization level 0 is sent, but connect The synchronization signal that the terminal of synchronization level 1a is sent is received, and the terminal of synchronization level 1a has been subjected to clock as synchronisation source Synchronous, then the synchronization level of the terminal is synchronization level 1.
Under another scene, if terminal does not receive the synchronization signal that the terminal of synchronization level 1a is sent, but receive To the time signal of UTC system, and the UTC system clock is subjected to as synchronisation source and has been synchronized, then the synchronization level of the terminal For synchronization level 1.
(4) synchronization level 2
If terminal only receives the synchronization signal that terminal of the synchronization level not higher than 1 is sent, (synchronization level is not high Including the terminal of synchronization level 1 in 1 terminal), for example, the synchronization signal that the terminal for not receiving synchronization level 1a is sent, But receive synchronization level 1 terminal send synchronization signal, and the terminal using the terminal of the synchronization level 1 as synchronisation source into Clock of having gone is synchronous, then the synchronization level of the terminal is synchronization level 2.
(5) synchronization level 3
In a scenario, if terminal receives the synchronization signal that the terminal of synchronization level 1a is sent, and by the synchronization The terminal of grade 1a has carried out clock as synchronisation source and has synchronized, then the synchronization level of the terminal is synchronization level 3.
Under another scene, if terminal only receives the synchronization signal (institute that terminal of the synchronization level not higher than 2 is sent State the terminal including synchronization level 2 in terminal of the synchronization level not higher than 2), for example, not receiving synchronization level 1a or synchronizing The synchronization signal that the terminal of grade 1 is sent, but the synchronization signal that the terminal for receiving synchronization level 2 is sent, and by the synchronization level 2 terminal has carried out clock as synchronisation source and has synchronized, then the synchronization level of the terminal is synchronization level 3.
Under another scene, if terminal only receives the synchronization signal that the terminal of synchronization level 3 is sent, according to N The synchronization signal for the synchronization level 3 that a (N is the integer more than or equal to 1) receives in synchronizing cycle carries out motor synchronizing, goes forward side by side Enter synchronization level 3.Wherein, self synchronous specific implementation is consistent with previous embodiment, and this will not be detailed here.
In another scene, if terminal does not receive the synchronization signal that base station or other terminals are sent, set at this After postponing a period of time length again after timing is long, into synchronization level 3.The time span of required delay can make an appointment or It is configured by base station, the value of the time span can as needed or system emulation or experience determine.
In above-mentioned clock synchronization scheme two, if terminal can receive base station or other terminals or UTC system is sent Synchronization signal, then it is synchronous to carry out clock according to following principle: when the terminal of low synchronization level receives the same of high synchronization level When walking signal, clock is carried out according to the synchronization signal of the high synchronization level received and is synchronized, for example, by the synchronization of high synchronization level Tranmitting data register of the reception clock of signal as this terminal.More preferably, can synchronization signal to the high synchronization level received into The timing-compensation that row is calibrated based on range calibration or uplink synchronous, by the synchronization signal of the high synchronization level after timing-compensation Receive tranmitting data register of the clock as this terminal.
For the sake of clarity, Fig. 2 shows a kind of implementation processes of clock synchronization scheme two.On the whole, the process institute It is if terminal receives the down-bound pilot frequency signal that the base station of synchronization level 0 is sent, this is same in the clock synchronization scheme two of description The base station for walking grade 0 carries out clock as synchronisation source and synchronizes, and enters synchronization level 1a；Otherwise, if being received in the first duration The time signal of the synchronization signal or UTC system that are sent to other terminals, then according to the synchronization level of other terminals by institute Other terminals are stated to synchronize as synchronisation source or using the UTC system as synchronisation source progress clock.
Specifically, as shown in Fig. 2, in step 201, starting timer d1, the timing of timer d1 after terminal booting Shi Changwei t1 (i.e. above-mentioned first duration).It should be noted that when the definition of timer d1 and the first duration here are only limitted to Clock synchronization scheme two.
It, can be according to following steps under the reception condition of synchronization signal in the timing time of timer d1:
If the down-bound pilot frequency signal that the base station for receiving synchronization level 0 is sent, when which is carried out as synchronisation source Clock is synchronous, and enters synchronization level 1a (see step 202~step 203)；
Otherwise, if the synchronization signal that the terminal for receiving synchronization level 1a is sent, the terminal of synchronization level 1a is made It is synchronous that clock is carried out for synchronisation source, and enters synchronization level 3 (see step 204~step 205)；
Otherwise, if receiving the time signal of UTC system transmission, it is same that clock is carried out using the UTC system as synchronisation source Step, and enter synchronization level 1 (see step 206~step 207)；
Otherwise, if receive synchronization level 1 terminal send synchronization signal, using the terminal of the synchronization level 1 as It is synchronous that synchronisation source carries out clock, and enters synchronization level 2 (see step 208~step 209)；
Otherwise, if receive synchronization level 2 terminal send synchronization signal, using the terminal of the synchronization level 2 as It is synchronous that synchronisation source carries out clock, and enters synchronization level 3 (see step 210~step 211)；
Otherwise, if receive synchronization level 3 terminal send synchronization signal, according to the terminal of the synchronization level 3 into Row motor synchronizing, and enter synchronization level 3 (see step 212~step 213)；
Otherwise, if timer d1 time-out, start timer d2 after timer d1 time-out, after timer d2 time-out Into synchronization level 3 (see step 214~step 215).
By the above-mentioned description to clock synchronization scheme two as can be seen that if the base station that terminal receives synchronization level 0 is sent out It is synchronous then to carry out clock using the base station of synchronization level 0 as synchronisation source, and enters synchronization level 1a for the down-bound pilot frequency signal sent； Otherwise, if receiving the synchronization signal of other terminals transmission or the time signal of UTC system in the first duration, by this its It is synchronous that his terminal or UTC system as synchronisation source carry out clock.As can be seen that above-described embodiment, according to different situations, terminal can To enter different synchronization levels, realize that the clock of different accuracy is synchronous.
(3) overall plan of synchronizing information transmission
It is synchronizing information transmission flow schematic diagram provided in an embodiment of the present invention, the process referring to Fig. 3 can include:
Step 301: terminal obtains synchronous signal sequence to be sent；Wherein, if terminal receives the broadcast of base station transmission Message then obtains synchronous signal sequence according to the broadcast message, otherwise, according to the synchronization level of the terminal from preconfigured same Synchronous signal sequence is obtained in step signal sequence set.
In the present embodiment, synchronous signal sequence set can be configured in base station side and terminal side in advance, include more in the set A synchronous signal sequence.The set may include N number of (N is the integer more than or equal to 3) subset, and different synchronization levels is corresponding not Same subset.In this way, base station is directed to different synchronization levels in base station side, different grades of terminal is needed by broadcast message The synchronous signal sequence to be sent is notified to terminal；In terminal side, if terminal can not receive the broadcast message of base station transmission, The synchronous signal sequence that base station notice can not be got by broadcasting the message, then can synchronizing according to the terminal itself Grade obtains the synchronous signal sequence that the terminal needs to send from the corresponding subset in the synchronous signal sequence set.
Step 302: terminal determines the synchronization subframe for sending synchronizing information according to the synchronization level of the terminal.
In the present embodiment, it can include 2 or 2 or more synchronization subframes a prespecified synchronizing cycle, and provide every Synchronization level corresponding to a synchronous subframe, a synchronous subframe can correspond to one or more synchronization levels, different synchronizations Synchronization level corresponding to subframe or synchronization level combination are different.In this way, terminal can be determined according to the synchronization level of itself The synchronization subframe of synchronizing information is sent, so as to so that the terminal of different synchronization levels sends same step used in synchronizing information Frame is orthogonal as far as possible in the time domain, so that the isochronous resources conflict of different synchronization level terminal rooms be reduced or avoided.
Step 303: terminal sends synchronizing information in the synchronization subframe determined, includes obtaining in transmitted synchronizing information The synchronous signal sequence got.It further, can also include Physical Broadcast Channel in the synchronizing information that terminal is sent (Physical Broadcast Shared Channel, PBSCH) content.
Synchronization signal can be used in terminal and PBSCH realizes the estimation of time and frequency, and can be further used for data Demodulation.PBSCH can be used for transmitting some system-level information, for example, DFN (D2D Frame Number, D2D frame number), same Step state, setting information (such as channel width etc.).
Specifically, the content for including in PBSCH can include:
- DFN:14bits=10 bits counter+4 bits offset (being consistent with the DFN of clock source)；
- TDD UL-DL config (TDD uplink-downlink configuration): 3bits；For FDD system, this 3 bit is set as 000；
- GNSS enable bit G (indicating bit in covering): 1bit, in pre-configuration, G=0；Wherein, G value can be 0 or 1, indicate that this terminal is to cover interior terminal when value is 1, it is terminal in covering that value, which indicates this terminal not when being 0, it may be possible to Part covering terminal, it is also possible to be the outer terminal of covering；
System bandwidth: 3bits；
Reserved field: 20bits, content sources are believed in SIB (System Information Block, system information block) It enables or its content is pre-configured value.
Above-mentioned process is applicable to clock synchronization scheme one above-mentioned or is suitable for clock synchronization scheme two above-mentioned.Such as Fruit is suitable for clock synchronization scheme one above-mentioned, then synchronization level involved in the process, and definition can be according to clock above-mentioned The definition of synchronization level explains in synchronization scheme one；If applicable in clock synchronization scheme two above-mentioned, then in the process The synchronization level being related to, definition can be explained according to the definition of synchronization level in clock synchronization scheme two above-mentioned.
The process is independently of clock synchronization scheme one above-mentioned, and independently of clock synchronization scheme two above-mentioned, In this case, synchronization level involved in the process, definition can be according in the clock synchronization scheme that the process is applicable in The definition of related synchronization grade explains.
In order to be more clearly understood that above-mentioned synchronizing information transmission plan, separately below in above-mentioned clock synchronization scheme one For under scene and under the scene of above-mentioned clock synchronization scheme two, it is described in detail.
(4) the synchronizing information transmission plan of clock synchronization scheme once
Under the scene of clock synchronization scheme one, it may particularly include following several situations:
Scene 1: terminal can not receive the broadcast message of base station, such as V2V (Vehicle to Vehicle, Che Chetong Letter) message；
Scene 2: terminal can receive the broadcast message to base station.
The synchronizing information transmission plan under above two scene is described separately below.
(1) scene 1: terminal can not receive the broadcast message of base station
In some embodiments, synchronization signal (such as SLSS (side Link Synchronization Signal, D2D synchronization signal)) arrangement set can be divided into 3 subsets: SLSS subset 1, SLSS subset 2, SLSS subset 3.Wherein, SLSS Quantity of the quantity of SLSS sequence included in collection 3 not less than SLSS sequence included in SLSS subset 2.This 3 subsets Respectively correspond synchronization level 1, synchronization level 2, synchronization level 3.In this case, terminal determines its synchronization signal sequence to be sent Column can be according to following principle:
The terminal of synchronization level 1 chooses a specific SLSS sequence from SLSS subset 1, synchronizes for example, can be directed to The terminal of grade 1 is made an appointment SLSS sequence (each of SLSS subset 1 that from SLSS subset 1 Selecting Index number is SLSS10 SLSS sequence is identified with unique call number)；
The terminal of synchronization level 2 chooses a specific SLSS sequence from SLSS subset 2, synchronizes for example, can be directed to The terminal of grade 2 is made an appointment SLSS sequence (each of SLSS subset 2 that from SLSS subset 2 Selecting Index number is SLSS20 SLSS sequence is identified with unique call number)；
The terminal of synchronization level 3 may include two kinds of situations:
If i) terminal of synchronization level 3 is to enter to synchronize in the case where not synchronous with any synchronisation source progress clock Grade 3, then the terminal chooses a SLSS sequence from SLSS subset 3, for example can choose one in random SLSS subset 3 SLSS sequence；
Ii) if the terminal of synchronization level 3 is synchronous not less than the synchronisation source of synchronization level 3 progress clock with synchronization level Into synchronization level 3, then the terminal obtains with the synchronous signal sequence that the synchronisation source is sent identical or phase according to the synchronisation source The synchronous signal sequence answered.For example, if terminal A is to carry out the same stepping of clock for the terminal B of synchronization level 3 as synchronisation source Enter synchronization level 3, then the SLSS sequence that SLSS sequence transmitted by terminal B is needed to send by terminal A as terminal A；If It is synchronous into synchronization level 3 that terminal A is that the terminal C for being 2 using synchronization level as synchronisation source carries out clock, then terminal A according to The SSLS sequence that terminal C is sent chooses a corresponding SSLS sequence from SLSS subset 3 and needs to send out as terminal A The SSLS sequence sent.Wherein, this corresponding relationship can make an appointment, as an example, if the SSLS sequence that terminal C is sent The call number being listed in SSLS subset 2 is SSLS2n, then terminal A chooses the SSLS sequence of same index number from SLSS subset 3 Column.
Under same scene, in further embodiments, SLSS arrangement set can be divided into 2 subsets: SLSS subset 1, SLSS Subset 2, SLSS subset 1 are further separated into subset 1a and subset 1b.Wherein, the quantity of SLSS sequence included in subset 2 is not Less than the quantity of the SLSS sequence in subset 1.Subset 1a corresponds to synchronization level 1, and subset 1b corresponds to synchronization level 2, SSLS subset 2 corresponding synchronization levels 3.In this case, terminal determine principle based on its synchronous signal sequence to be sent as described above, It is not repeated herein, only because the corresponding relationship of synchronization level and the subset in SLSS arrangement set is different, specific It needs to choose SLSS sequence from respective subset according to the corresponding relationship arranged in the case of this kind when implementation.
In the present embodiment, within a synchronizing cycle, 3 subframes are reserved as synchronous subframe, which can pass Defeated synchronizing information (such as including synchronizing pilot and broadcast message), this 3 synchronous subframes in the time domain can continuously not yet Continuously.In general, synchronizing cycle is 40ms, the embodiment of the present invention to the length of synchronizing cycle with no restrictions.
This 3 synchronous subframes may be expressed as: the first synchronous subframe, the second synchronous subframe, the synchronous subframe of third.Wherein, " the Step frame together " is not meant to " first synchronous subframe ", it can be any one of this 3 synchronous subframes subframe, Here " first ", " second ", " third " are only used for distinguishing synchronous subframe, do not represent other meanings.
As an example, the first synchronous subframe can be arranged and correspond to synchronization level 1 and synchronization level 3, the second same step Frame corresponds to synchronization level 2, and the synchronous subframe of third corresponds to synchronization level 3.In this way, terminal can be according to the synchronization level of the terminal itself It determines that it is used to send the synchronization subframe of synchronizing information, specifically may include following situation:
If the synchronization level of terminal is synchronization level 1, it is determined that the first synchronous subframe is as the synchronization for sending synchronizing information Subframe；
If the synchronization level of terminal is synchronization level 2, it is determined that the second synchronous subframe is as the synchronization for sending synchronizing information Subframe；
If the synchronization level of terminal is synchronization level 3, and the synchronous letter that the terminal that can receive synchronization level 2 is sent Number, it is determined that the synchronous subframe of third is as the synchronization subframe for sending synchronizing information；Otherwise, it determines the first synchronous subframe or third are same Step frame (for example is randomly choosed as the synchronization subframe for sending synchronizing information from the first synchronous subframe subframe synchronous with third One synchronous subframe).
In further embodiments, within a synchronizing cycle, 2 subframes are reserved as synchronous subframe, the synchronization subframe Synchronizing information (such as including synchronizing pilot and broadcast message) can be transmitted, this 2 synchronous subframes in the time domain can be continuously It can be discontinuous.In general, synchronizing cycle is 40ms, the embodiment of the present invention to the length of synchronizing cycle with no restrictions.
This 2 synchronous subframes may be expressed as: the first synchronous subframe, the second synchronous subframe.Wherein, " first synchronous subframe " simultaneously Not meaning that " first synchronous subframe ", it can be any one of this 2 synchronous subframes subframe, " first " here, " second " is only used for distinguishing synchronous subframe, does not represent other meanings.
As an example, the first synchronous subframe can be arranged and correspond to synchronization level 1 and synchronization level 3, the second same step Frame corresponds to synchronization level 2 and synchronization level 3.In this way, terminal can determine that it is used to send according to the synchronization level of the terminal itself The synchronization subframe of synchronizing information, specifically may include following situation:
If the synchronization level of terminal is synchronization level 1, it is determined that the first synchronous subframe is as the synchronization for sending synchronizing information Subframe；
If the synchronization level of terminal is synchronization level 2, it is determined that the second synchronous subframe is as the synchronization for sending synchronizing information Subframe；
If the synchronization level of terminal is synchronization level 3, and the synchronous letter that the terminal that can receive synchronization level 2 is sent Number, it is determined that the first synchronous subframe is as the synchronization subframe for sending synchronizing information；Otherwise, it determines the first synchronous subframe or second is together Step frame (for example is randomly choosed as the synchronization subframe for sending synchronizing information from the first synchronous subframe subframe synchronous with second One synchronous subframe).
In further embodiments, within a synchronizing cycle, 2 subframes are reserved as synchronous subframe, the synchronization subframe Synchronizing information (such as including synchronizing pilot and broadcast message) can be transmitted, this 2 synchronous subframes in the time domain can be continuously It can be discontinuous.In general, synchronizing cycle is 40ms, the embodiment of the present invention to the length of synchronizing cycle with no restrictions.This 2 Synchronous subframe may be expressed as: the first synchronous subframe, the second synchronous subframe.Wherein, " the first synchronous subframe " is not meant to " first A synchronous subframe ", it can be any one of this 2 synchronous subframes subframe, and " first ", " second " here is only used for pair Synchronous subframe distinguishes, and does not represent other meanings.
As an example, the first synchronous subframe can be arranged and correspond to synchronization level 1, the second synchronous subframe correspondence synchronizes Grade 2.In this way, the terminal of synchronization level 1 and synchronization level 2 can determine that it is used to send together according to the synchronization level of the terminal itself Walk the synchronization subframe of information.But for the terminal of synchronization level 3, the same step for sending synchronizing information can not be determined Frame, therefore abandon sending synchronizing information.
Further, different frequency domain resources can be used to send for synchronization level 1, synchronization level 2, the terminal of synchronization level 3 Synchronizing information.Fig. 4 schematically illustrates a kind of schematic diagram of frequency domain resource that synchronizing information occupies.
Further, if including also PBSCH content in the synchronizing information that terminal is sent, base can not be received in terminal It stands in the case where the broadcast message sent, which can obtain PBSCH content predetermined, by the PBSCH predetermined Content is sent in synchronous subframe together with SLSS sequence.
(2) scene 2: terminal can receive the broadcast message of base station
In some embodiments, synchronization signal (such as SLSS) arrangement set can be divided into 3 sons in the manner previously described Collection: SLSS subset 1, SLSS subset 2, SLSS subset 3.This 3 subsets respectively correspond synchronization level 1, synchronization level 2, synchronize Grade 3.In this case, the finger of the corresponding synchronous signal sequence of various synchronization levels can be carried in the broadcast message that base station is sent Show information, can specifically include following situations:
The corresponding SLSS sequence of synchronization level 1 is chosen from SLSS subset 1, for example, can be pre- for synchronization level 1 First arrange from Selecting Index number in SLSS subset 1 be SLSS10 SLSS sequence (each SLSS sequence in SLSS subset 1 is equal It is identified with unique call number)；
The corresponding SLSS sequence of synchronization level 2 is chosen from SLSS subset 2, for example, can be pre- for synchronization level 2 First arrange from Selecting Index number in SLSS subset 2 be SLSS20 SLSS sequence (each SLSS sequence in SLSS subset 2 is equal It is identified with unique call number)；
The corresponding SLSS sequence of synchronization level 3 is chosen from SLSS subset 3, for example, can be for synchronization level 3 SLSS sequence (each SLSS in SLSS subset 3 that it is SLSS30 from Selecting Index number in SLSS subset 3 that terminal, which is made an appointment, Sequence is identified with unique call number).
In further embodiments, can in the manner previously described, SLSS arrangement set is divided into 2 subsets: SLSS subset 1, SLSS subset 2, SLSS subset 1 are further separated into subset 1a and subset 1b.Subset 1a corresponds to synchronization level 1, and subset 1b is corresponding same Walk grade 2, the corresponding synchronization level 3 of SSLS subset 2.In this case, each synchronization level that base station is notified by broadcast message Principle based on synchronous signal sequence as described above, be not repeated, only because synchronization level and SLSS arrangement set herein In subset corresponding relationship it is different, needed in the specific implementation according to the corresponding relationship arranged in the case of this kind from phase Answer selection SLSS sequence in subset.
As described in above-mentioned scene 1, it can configure 2 or 3 synchronous subframes in a synchronizing cycle, terminal is according to the same of itself Step grade determine the terminal send synchronizing information synchronization subframe process can as described in the associated description in above-mentioned scene 1, This is not repeated.
Further, if including also PBSCH content in the synchronizing information that terminal is sent, base can be received in terminal In the case where the broadcast message sent of standing, which can obtain PBSCH content according to the broadcast message, this is got PBSCH content is sent in synchronous subframe together with SLSS sequence.Wherein, base station can carry PBSCH content in broadcast message Or relevant information.
(5) the synchronizing information transmission plan under clock synchronization scheme two
Under the scene of clock synchronization scheme two, it may particularly include following several situations:
Scene 3: terminal can not receive the broadcast message of base station, such as V2V message, can not also receive synchronization level 1a's The synchronization signal that terminal is sent；
Scene 4: terminal can not receive the broadcast message of base station, but the terminal that can receive synchronization level 1a is sent Synchronization signal；
Scene 5: terminal can receive the broadcast message of base station transmission.
The synchronizing information transmission plan under above two scene is described separately below.
(1) scene 3: terminal can not receive the broadcast message of base station, and the terminal that can not also receive synchronization level 1a is sent Synchronization signal
Under the scene, synchronization signal (such as SLSS) arrangement set can be divided into 3 subsets: SLSS subset 1, SLSS subset 2, SLSS subset 3.Corresponding relationship between specific division methods and each subset and synchronization level, reference can be made in scene 1 Associated description.Correspondingly, the correlation that terminal determines that the principle of its synchronous signal sequence to be sent also can be found in scene 1 is retouched It states.
It may include 2 or 3 synchronous subframes under the scene, in a synchronizing cycle.Each synchronous subframe and synchronization level Between corresponding relationship and terminal determine itself send synchronizing information synchronization subframe mode, reference can be made to the phase in scene 1 Close description.
Preferably, synchronization level 1a corresponds to identical synchronous subframe with synchronization level 1.If the synchronization level of terminal is same Grade 3 is walked, and is that the terminal of synchronization level 1a is carried out clock as synchronisation source to synchronize into synchronization level 3, then according to work For synchronisation source the synchronization level 1a terminal send the first synchronous signal sequence, from the corresponding subset of synchronization level 3 After choosing the second synchronous signal sequence, second synchronous signal sequence is occupied in the synchronization signal of the synchronization level 1a It is sent in a synchronous subframe after synchronous subframe.
Further, if including also PBSCH content in the synchronizing information that terminal is sent, base can not be received in terminal In the case where the synchronization signal that the broadcast message sent of standing and the terminal that can not receive synchronization level 1a are sent, which can be obtained PBSCH content predetermined is taken, which is sent in synchronous subframe together with SLSS sequence.
(2) scene 4: terminal can not receive the broadcast message of base station, but can receive the terminal hair of synchronization level 1a The synchronization signal sent
Under the scene, synchronization signal (such as SLSS) arrangement set can be divided into 3 subsets: SLSS subset 1, SLSS subset 2, SLSS subset 3.Corresponding relationship between specific division methods and each subset and synchronization level, reference can be made in scene 1 Associated description.Correspondingly, the correlation that terminal determines that the principle of its synchronous signal sequence to be sent also can be found in scene 1 is retouched It states.
Particularly, if the synchronization level of terminal is 3, and the terminal of synchronization level 1a is subjected to clock as synchronisation source and is synchronized Into synchronization level 3, then the first synchronous signal sequence sent according to the terminal of the synchronization level 1a as synchronisation source, The second synchronous signal sequence is chosen from the corresponding subset of synchronization level 3；Wherein, the first synchronous signal sequence letter synchronous with second The corresponding relationship of number sequence is made an appointment.
It may include 2 or 3 synchronous subframes under the scene, in a synchronizing cycle.Each synchronous subframe and synchronization level Between corresponding relationship and terminal determine itself send synchronizing information synchronization subframe mode, reference can be made to the phase in scene 1 Close description.Preferably, synchronization level 1a corresponds to identical synchronous subframe with synchronization level 1.If the synchronization level of terminal is same Grade 3 is walked, and is that the terminal of synchronization level 1a is carried out clock as synchronisation source to synchronize into synchronization level 3, then according to work For synchronisation source the synchronization level 1a terminal send the first synchronous signal sequence, from the corresponding subset of synchronization level 3 After choosing the second synchronous signal sequence, second synchronous signal sequence is occupied in the synchronization signal of the synchronization level 1a It is sent in a synchronous subframe after synchronous subframe.
Further, if including also PBSCH content in the synchronizing information that terminal is sent, base can not be received in terminal Stand send broadcast message, but can receive synchronization level 1a terminal send synchronization signal in the case where, which can From the terminal of synchronization level 1a send synchronizing information in obtain PBSCH content, by the PBSCH content got with SLSS sequence is sent in synchronous subframe together.
(3) scene 5: terminal can receive the broadcast message of base station transmission
Under the scene, synchronization signal (such as SLSS) arrangement set can be divided into 3 subsets: SLSS subset 1, SLSS subset 2, SLSS subset 3.Corresponding relationship between specific division methods and each subset and synchronization level, reference can be made in scene 1 Associated description.Correspondingly, base station can also join in such a way that broadcast message notifies the corresponding synchronous signal sequence of each synchronization level See the associated description in scene 1.
Particularly, for synchronization level 1, base station can select 1 SLSS sequence from SLSS subset 1, and be disappeared by broadcast Breath is notified.
It may include 2 or 3 synchronous subframes under the scene, in a synchronizing cycle.Each synchronous subframe and synchronization level Between corresponding relationship and terminal determine itself send synchronizing information synchronization subframe mode, reference can be made to the phase in scene 1 Close description.Preferably, synchronization level 1a corresponds to identical synchronous subframe with synchronization level 1.If the synchronization level of terminal is same Grade 3 is walked, and is that the terminal of synchronization level 1a is carried out clock as synchronisation source to synchronize into synchronization level 3, then according to work For synchronisation source the synchronization level 1a terminal send the first synchronous signal sequence, from the corresponding subset of synchronization level 3 After choosing the second synchronous signal sequence, second synchronous signal sequence is occupied in the synchronization signal of the synchronization level 1a It is sent in a synchronous subframe after synchronous subframe.
Further, if a terminal detects that SLSS sequence of the synchronous signaling of synchronisation source transmission in SLSS subset 1 It arranges, the G=1 in PBSCH, then may determine that the synchronization level of the synchronisation source is synchronization level 1a.
Further, if including also PBSCH content in the synchronizing information that terminal is sent, base can be received in terminal In the case where the broadcast message sent of standing, which can obtain PBSCH content according to the broadcast message, this is got PBSCH content is sent in synchronous subframe together with SLSS sequence.Wherein, base station can carry PBSCH content in broadcast message Or relevant information.
Based on the same technical idea, as shown in Figure 5 and Figure 6, the embodiment of the present invention also each provides a kind of terminal, should Terminal can realize above-mentioned clock synchronization scheme one.
Terminal as shown in Figure 5, it may include: receiving module 501 and synchronization module 502.Synchronization module 502, if for connecing The time signal that module 501 receives UTC system is received, then it is synchronous to carry out clock using the UTC system as synchronisation source, and enters Synchronization level 1；Otherwise, if the receiving module receives synchronization signal in the first duration, according to the synchronization signal It is synchronous to carry out clock using the terminal for sending the synchronization signal or base station as synchronisation source for grade.
Preferably, synchronization module 502 can be specifically used for:
If the receiving module does not receive the time signal of UTC system in the first duration, but receives synchronization level 0 Base station send down-bound pilot frequency signal, then:
Using the base station of the synchronization level 0 as synchronisation source, it is timed based on range calibration or uplink synchronous calibration It is synchronous that clock is carried out on the basis of compensation, and enters synchronization level 2；Alternatively,
The base station is carried out clock as synchronisation source to synchronize, and according to the enabled mark of the timing-compensation of base station configuration Will, into synchronization level 2 or synchronization level 3, the timing-compensation enabler flags are used to indicate whether enabled timing-compensation；Its In, if timing-compensation is enabled, and the terminal is in the base for being timed compensation based on range calibration or uplink synchronous calibration The clock carried out on plinth is synchronous, then enters synchronization level 2, otherwise enters synchronization level 3, if timing-compensation is not enabled, into Enter synchronization level 2；
Wherein, the base station of the synchronization level 0 refers to: it is synchronous to have carried out clock with UTC system, and can be by descending pilot frequency The base station that the offset of signal and UTC clock is broadcasted.
Preferably, synchronization module 502 can be specifically used for:
It, will be described if receiving module 501 receives the synchronization signal that the terminal of synchronization level 1 is sent in the first duration The terminal of synchronization level 1 carries out clock as synchronisation source and synchronizes, and enters synchronization level 2；Alternatively,
If receiving module 501 does not receive the synchronization signal that the terminal of synchronization level 1 is sent in the first duration, but receives It is same then to carry out clock using the terminal of the synchronization level 2 as synchronisation source for the synchronization signal sent to the terminal of synchronization level 2 Step, and enter synchronization level 3；Alternatively,
If receiving module 501 only receives the synchronization signal of the transmission of synchronization level 3 in the first duration, according to N number of The synchronization signal of all synchronization levels 3 received in synchronizing cycle carries out clock and synchronizes, or will be in N number of synchronizing cycle In the source terminal of the synchronization signal of the synchronization level 3 received, it is synchronous that time forward terminal as synchronisation source carries out clock, And enter synchronization level 3, wherein N is the integer more than or equal to 1；Wherein, the synchronization signal of the synchronization level 3 includes same The synchronization signal that the terminal and/or base station for walking grade 3 are sent, the base station of the synchronization level 3 refer to: not carrying out with UTC system The synchronous base station of clock or the base station that self-position can not be obtained.
Preferably, synchronization module 502 can be also used to: if receiving module 501 does not receive UTC system in first duration The time signal of system does not receive the synchronization signal of base station or the transmission of other terminals, then in second after the first duration yet When long cut-off, into synchronization level 3.
Preferably, synchronization module 502 can also be used in: if the receiving module 501 into the terminal of synchronization level 1 receives The synchronization signal that base station or other terminals are sent then abandons the base station that will send the synchronization signal or other terminals as synchronization It is synchronous that source carries out clock.
Terminal as shown in FIG. 6, it may include: processor 601, memory 602, transceiver 603 and bus interface.
Processor 601, which is responsible for management bus architecture and common processing, memory 602, can store processor 601 and is holding Used data when row operation.Transceiver 603 is for sending and receiving data under the control of processor 601.
Bus architecture may include the bus and bridge of any number of interconnection, specifically represented by processor 601 one or The various circuits for the memory that multiple processors and memory 602 represent link together.Bus architecture can also will be such as outer Various other circuits of peripheral equipment, voltage-stablizer and management circuit or the like link together, these are all that this field institute is public Know, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 603 can be multiple members Part includes transmitter and transceiver, provides the unit for communicating over a transmission medium with various other devices.Processor 601 are responsible for management bus architecture and common processing, and memory 602 can store processor 601 and be used when executing operation Data.
The process for the clock synchronization scheme one that the embodiment of the present invention discloses, can be applied in processor 601, or by Device 601 is managed to realize.During realization, each step of one process of clock synchronization scheme can pass through the hardware in processor 601 Integrated logic circuit or software form instruction complete.Processor 601 can be general processor, Digital Signal Processing Device, specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device Part, discrete hardware components may be implemented or execute disclosed each method, step and logic diagram in the embodiment of the present invention. General processor can be microprocessor or any conventional processor etc..The method in conjunction with disclosed in the embodiment of the present invention Step can be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination executed At.Software module can be located at random access memory, and flash memory, read-only memory, programmable read only memory or electrically-erasable can In the storage medium of this fields such as programmable memory, register maturation.The storage medium is located at memory 602, and processor 601 is read Information in access to memory 602, in conjunction with its hardware complete previous embodiment provide clock synchronization scheme one process the step of.
Specifically, processor 601, for reading the program in memory 602, the clock for executing previous embodiment description is same The process of step scheme one.The specific implementation of the process can be found in previous embodiment, and details are not described herein.
Based on the same technical idea, as shown in Figure 7 and Figure 8, the embodiment of the present invention also each provides a kind of terminal, should Terminal can realize above-mentioned clock synchronization scheme two.
Terminal as shown in Figure 7 can include: receiving module 701 and synchronization module 702；Synchronization module 702, if for receiving Module 701 receives the down-bound pilot frequency signal that the base station of synchronization level 0 is sent, then using the base station of the synchronization level 0 as same It is synchronous that step source carries out clock, and enters synchronization level 1a；Otherwise, if the receiving module receives other ends in the first duration Hold the time signal of the synchronization signal or UTC system that send, then it will other described ends according to the synchronization level of other terminals End is synchronous as synchronisation source progress clock as synchronisation source or using the UTC system.
Preferably, synchronization module 702 can be specifically used for:
If the receiving module receives the synchronization signal that the terminal of synchronization level 1a is sent in the first duration, by institute The terminal for stating synchronization level 1a carries out clock as synchronisation source and synchronizes, and enters synchronization level 3；Alternatively,
If receiving module 701 only receives the synchronization signal that terminal of the synchronization level not higher than 1 is sent in the first duration, The synchronization level includes the terminal of synchronization level 1 in the terminal not higher than 1, then using the terminal of the synchronization level 1 as same It is synchronous that step source carries out clock, and enters synchronization level 2；Alternatively,
If receiving module 701 only receives the synchronization signal that terminal of the synchronization level not higher than 2 is sent in the first duration, The synchronization level includes the terminal of synchronization level 2 in the terminal not higher than 2, then using the terminal of the synchronization level 2 as same It is synchronous that step source carries out clock, and enters synchronization level 3；Alternatively,
If receiving module 701 only receives the synchronization signal that the terminal of synchronization level 3 is sent, basis in the first duration It is synchronous that the synchronization signals of all synchronization levels 3 received in N number of synchronizing cycle carries out clock, or N number of synchronizes week for described In the source terminal of the synchronization signal of the interim synchronization level 3 received, time forward terminal carries out clock as synchronisation source It is synchronous, and enter synchronization level 3, wherein N is the integer more than or equal to 1.
Preferably, synchronization module 702 can be specifically used for: if receiving module 701 is not received and synchronized in the first duration The synchronization signal that the terminal of grade 1a is sent, but receive the time signal of UTC system, then using the UTC system as synchronisation source It is synchronous to carry out clock, and enters synchronization level 1.
Preferably, synchronization module 702 can also be used in: if receiving module 701 does not receive base station in first duration Or the synchronization signal that other terminals are sent, then in the second duration cut-off after the first duration, into synchronization level 3.
Terminal as shown in Figure 8, it may include: processor 801, memory 802, transceiver 803 and bus interface.
Processor 801, which is responsible for management bus architecture and common processing, memory 802, can store processor 801 and is holding Used data when row operation.Transceiver 803 is for sending and receiving data under the control of processor 801.
Bus architecture may include the bus and bridge of any number of interconnection, specifically represented by processor 801 one or The various circuits for the memory that multiple processors and memory 802 represent link together.Bus architecture can also will be such as outer Various other circuits of peripheral equipment, voltage-stablizer and management circuit or the like link together, these are all that this field institute is public Know, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 803 can be multiple members Part includes transmitter and transceiver, provides the unit for communicating over a transmission medium with various other devices.Processor 801 are responsible for management bus architecture and common processing, and memory 802 can store processor 801 and be used when executing operation Data.
The process for the clock synchronization scheme two that the embodiment of the present invention discloses, can be applied in processor 801, or by Device 801 is managed to realize.During realization, each step of two process of clock synchronization scheme can pass through the hardware in processor 801 Integrated logic circuit or software form instruction complete.Processor 801 can be general processor, Digital Signal Processing Device, specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device Part, discrete hardware components may be implemented or execute disclosed each method, step and logic diagram in the embodiment of the present invention. General processor can be microprocessor or any conventional processor etc..The method in conjunction with disclosed in the embodiment of the present invention Step can be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination executed At.Software module can be located at random access memory, and flash memory, read-only memory, programmable read only memory or electrically-erasable can In the storage medium of this fields such as programmable memory, register maturation.The storage medium is located at memory 802, and processor 801 is read Information in access to memory 802, in conjunction with its hardware complete previous embodiment provide clock synchronization scheme two process the step of.
Specifically, processor 801, for reading the program in memory 802, the clock for executing previous embodiment description is same The process of step scheme two.The specific implementation of the process can be found in previous embodiment, and details are not described herein.
Based on the same technical idea, as shown in Figure 9 and Figure 10, the embodiment of the present invention also each provides a kind of terminal, The terminal can realize above-mentioned synchronizing information transmission plan.
Terminal as shown in Figure 9, it may include:
Module 901 is obtained, for obtaining synchronous signal sequence to be sent；Wherein, if the terminal receives base station hair The broadcast message sent, then according to the broadcast message obtain synchronous signal sequence, otherwise, according to the synchronization level of the terminal from Synchronous signal sequence is obtained in preconfigured synchronous signal sequence set；
Determining module 902 determines the synchronization subframe for sending synchronizing information for the synchronization level according to the terminal；
Sending module 903 wraps in transmitted synchronizing information for sending synchronizing information in the synchronization subframe determined Include the synchronous signal sequence got.
It preferably, include N number of subset in the preconfigured synchronous signal sequence set, N is whole more than or equal to 3 Number, different synchronization levels correspond to different subsets.It is specifically used for correspondingly, obtaining module 901:
If the synchronization level of the terminal is 1, one to make an appointment is chosen from subset corresponding with synchronization level 1 Synchronous signal sequence；Alternatively,
If the synchronization level of the terminal is 2, selection one is made an appointment same from the corresponding subset of synchronization level 2 Walk signal sequence；Alternatively,
If the synchronization level of the terminal is 3, and is synchronized in entrance not synchronous with any synchronisation source progress clock Grade 3, then a synchronous signal sequence is chosen from the corresponding subset of synchronization level 3, if the synchronization level of the terminal is 3, And be with synchronization level not less than synchronization level 3 synchronisation source carry out clock it is synchronous enter synchronization level 3, then according to it is described together Step source obtains synchronous signal sequence identical or corresponding with the synchronous signal sequence that the synchronisation source is sent.
Wherein, module 901 is obtained to be specifically used for:
If the synchronization level of the terminal is 3, and is carried out using synchronization level 2 or the terminal of synchronization level 1a as synchronisation source Clock is synchronous entering synchronization level 3, then is sent according to the terminal of the synchronization level 2 or synchronization level 1a as synchronisation source The first synchronous signal sequence, choose the second synchronous signal sequence from the corresponding subset of synchronization level 3；Wherein, first is synchronous The corresponding relationship of signal sequence and the second synchronous signal sequence is made an appointment；Alternatively,
If the synchronization level of the terminal is 3, and the terminal of synchronization level 3 is carried out clock as synchronisation source and enters synchronization Grade 3, then using as synchronous signal sequence transmitted by the terminal of the synchronization level 3 of synchronisation source as described to be sent Synchronous signal sequence.
Wherein, obtaining module 901 can be specifically used for:
If the synchronization level of the terminal is 3, and is that the terminal of synchronization level 1a is carried out clock as synchronisation source to synchronize Into synchronization level 3, then the first synchronous signal sequence sent according to the terminal of the synchronization level 1a as synchronisation source, The second synchronous signal sequence is chosen from the corresponding subset of synchronization level 3, first synchronous signal sequence and described second is together The corresponding relationship of step signal sequence is pre-configured with or arranges；
Determining module 902 can be specifically used for: when determining the synchronization subframe for sending synchronizing information, by the synchronization level 1a Synchronization signal occupy synchronization subframe after a synchronous subframe, be determined as this terminal transmission synchronizing information same step Frame.
Preferably, the first synchronous subframe, the second synchronous subframe, the synchronous subframe totally 3 of third are included in a synchronizing cycle Synchronous subframe, the first synchronous subframe correspond to synchronization level 1 and synchronization level 3, and the second synchronous subframe corresponds to synchronization level 2, third Synchronous subframe corresponds to synchronization level 3；Correspondingly, determining module 902 can be specifically used for:
If the synchronization level of the terminal is synchronization level 1, it is determined that the first synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 2, it is determined that the second synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 3, and the synchronization that the terminal that can receive synchronization level 2 is sent Signal, it is determined that the synchronous subframe of third is as the synchronization subframe for sending synchronizing information；Otherwise, it determines the first synchronous subframe or third Synchronous subframe is as the synchronization subframe for sending synchronizing information.
Preferably, in a synchronizing cycle comprising the first synchronous subframe subframe synchronous with second totally 2 synchronous subframes, first Synchronous subframe corresponds to synchronization level 1 and synchronization level 3, and the second subframe corresponds to synchronization level 2 and synchronization level 3；Correspondingly, determining Module 902 can be specifically used for:
If the synchronization level of the terminal is synchronization level 1, it is determined that the first synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 2, it is determined that the second synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 3, and the synchronization that the terminal that can receive synchronization level 2 is sent Signal, it is determined that the first synchronous subframe is as the synchronization subframe for sending synchronizing information；Otherwise, it determines the first synchronous subframe or second Subframe is as the synchronization subframe for sending synchronizing information.
Preferably, in a synchronizing cycle comprising the first synchronous subframe subframe synchronous with second totally 2 synchronous subframes, first Synchronous subframe corresponds to synchronization level 1, and the second synchronous subframe corresponds to synchronization level 2；Correspondingly, determining module 902 can be specifically used for:
If the synchronization level of the terminal is synchronization level 1, it is determined that the first synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is synchronization level 2, it is determined that the second synchronous subframe is as transmission synchronizing information Synchronous subframe；Alternatively,
If the synchronization level of the terminal is 3, abandon sending synchronizing information.
Preferably, the pre-set synchronous signal sequence set includes N number of subset, and N is the integer more than or equal to 3, Different synchronization levels corresponds to different subsets；The instruction of synchronous signal sequence is carried in the broadcast message that the base station is sent Information, in which: synchronization level 1 or the corresponding synchronous signal sequence of synchronization level 1a are selected from the corresponding subset of synchronization level 1 It takes；The corresponding synchronous signal sequence of synchronization level 2 is chosen from the corresponding subset of synchronization level 2；Synchronization level 3 is corresponding Synchronous signal sequence be to be chosen from the corresponding subset of synchronization level 3.
Preferably, the subset quantity for including in the preconfigured synchronous signal sequence set is 3,3 subsets Synchronization level 1, synchronization level 2 and synchronization level 3 are respectively corresponded, the number of synchronous signal sequence in the corresponding subset of synchronization level 3 Quantity of the amount not less than synchronous signal sequence in the corresponding subset of synchronization level 2；Alternatively, the preconfigured synchronization signal sequence Include the first subset and second subset in column set, the first subset includes 2 subsets, respectively correspond synchronization level 1 with it is synchronous etc. Grade 2, second subset corresponds to synchronization level 3, and the quantity of synchronous signal sequence is not less than letter synchronous in the first subset in second subset The quantity of number sequence.
It preferably, further include PBSCH content in the synchronizing information that the terminal is sent；Wherein, if the terminal receives The broadcast message that base station is sent, then the PBSCH content that the terminal is sent is obtained from the broadcast message, otherwise, institute It is preconfigured for stating the PBSCH content of terminal transmission；Alternatively, further including in PBSCH in the synchronizing information that the terminal is sent Hold；Wherein, if the terminal does not receive the broadcast message of base station transmission and do not receive the terminal transmission of synchronization level 1a yet Synchronization signal, then the PBSCH content that the terminal is sent is preconfigured, if the terminal does not receive the broadcast of base station The synchronization signal that message but the terminal for receiving synchronization level 1a are sent, then the PBSCH content that the terminal is sent is from described It is obtained in the synchronization signal that the terminal of synchronization level 1a is sent, if the terminal receives the broadcast message of base station transmission, The PBSCH content that the terminal is sent is obtained from the broadcast message that base station is sent.
Preferably, determining module 902 can also be used in: if detecting isochronous resources used in the terminal and other terminals Used isochronous resources clash, then new idle subframe is selected to send synchronizing information.
Terminal as shown in Figure 10, it may include: processor 1001, memory 1002, transceiver 1003 and bus connect Mouthful.
Processor 1001, which is responsible for management bus architecture and common processing, memory 1002, can store processor 801 and exists Execute used data when operation.Transceiver 1003 is for sending and receiving data under the control of processor 1001.
Bus architecture may include the bus and bridge of any number of interconnection, specifically represented by processor 1001 one or The various circuits for the memory that multiple processors and memory 1002 represent link together.Bus architecture can also will be such as outer Various other circuits of peripheral equipment, voltage-stablizer and management circuit or the like link together, these are all that this field institute is public Know, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 1003 can be multiple members Part includes transmitter and transceiver, provides the unit for communicating over a transmission medium with various other devices.Processor 1001 are responsible for management bus architecture and common processing, and memory 1002 can store processor 1001 to be made when executing operation Data.
The process for the synchronizing information transmission plan that the embodiment of the present invention discloses, can be applied in processor 1001, or It is realized by processor 1001.During realization, each step of synchronizing information transmission plan process can pass through processor 1001 In hardware integrated logic circuit or software form instruction complete.Processor 1001 can be general processor, number Signal processor, specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or crystal Pipe logical device, discrete hardware components may be implemented or execute the disclosed each method in the embodiment of the present invention, step and patrol Collect block diagram.General processor can be microprocessor or any conventional processor etc..In conjunction with disclosed in the embodiment of the present invention Method the step of can be embodied directly in hardware processor and execute completion, or with the hardware and software module group in processor Conjunction executes completion.Software module can be located at random access memory, flash memory, read-only memory, programmable read only memory or electricity In the storage medium of this fields such as erasable programmable memory, register maturation.The storage medium is located at memory 1002, place The information in the reading memory 1002 of device 1001 is managed, completes the synchronizing information transmission plan that previous embodiment provides in conjunction with its hardware Process the step of.
Specifically, processor 1001 execute the synchronization of previous embodiment description for reading the program in memory 1002 The process of information transmission scheme.The specific implementation of the process can be found in previous embodiment, and details are not described herein.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions each in flowchart and/or the block diagram The combination of process and/or box in process and/or box and flowchart and/or the block diagram.It can provide these computers Processor of the program instruction to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices To generate a machine, so that generating use by the instruction that computer or the processor of other programmable data processing devices execute In the dress for realizing the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram It sets.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (14)

1. a kind of clock synchronizing method characterized by comprising
If terminal receives the time signal of world concordant time UTC system, when the UTC system is carried out as synchronisation source Clock is synchronous, and enters synchronization level 1；
Otherwise, if receiving synchronization signal in the first duration, according to the grade of the synchronization signal, the synchronization will be sent The terminal of signal or base station carry out clock as synchronisation source and synchronize；
Wherein, if not receiving the time signal of UTC system in the first duration, but the base station for receiving synchronization level 0 is sent Down-bound pilot frequency signal, then:
Using the base station of the synchronization level 0 as synchronisation source, compensation is being timed based on range calibration or uplink synchronous calibration On the basis of to carry out clock synchronous, and enter synchronization level 2；Alternatively,
The timing-compensation that clock is synchronized, and configured according to the base station is carried out using the base station of the synchronization level 0 as synchronisation source Enabler flags, into synchronization level 2 or synchronization level 3, the timing-compensation enabler flags are used to indicate whether that enabled timing is mended It repays；Wherein, if timing-compensation is enabled, and the terminal is to be timed compensation based on range calibration or uplink synchronous calibration On the basis of the clock that carries out it is synchronous, then the terminal enters synchronization level 2, otherwise enters synchronization level 3, if timing-compensation is not It is enabled, then enters synchronization level 2；
Wherein, the base station of the synchronization level 0 refers to: it is synchronous to have carried out clock with UTC system, and can be by down-bound pilot frequency signal The base station broadcasted with the offset of UTC clock.
2. the method as described in claim 1, which is characterized in that if described receive synchronization signal in the first duration, according to It is synchronous to carry out clock using the terminal for sending the synchronization signal as synchronisation source for the grade of the synchronization signal, comprising:
If the synchronization signal that the terminal for receiving synchronization level 1 in the first duration is sent, by the terminal of the synchronization level 1 It is synchronous that clock is carried out as synchronisation source, and enters synchronization level 2；Alternatively,
If the synchronization signal that the terminal for not receiving synchronization level 1 in the first duration is sent, but receive the end of synchronization level 2 The synchronization signal sent is held, then it is synchronous to carry out clock using the terminal of the synchronization level 2 as synchronisation source, and enters synchronization level 3；Alternatively,
If only receiving the synchronization signal of the transmission of synchronization level 3 in the first duration, received according in N number of synchronizing cycle The synchronization signals of all synchronization levels 3 to carry out clock synchronous, or the synchronization level that will be received in N number of synchronizing cycle In the source terminal of 3 synchronization signal, it is synchronous that time forward terminal as synchronisation source carries out clock, and enters synchronization level 3, Wherein, N is the integer more than or equal to 1；Wherein, the synchronization signal of the synchronization level 3 include synchronization level 3 terminal and/ Or the synchronization signal that base station is sent, the base station of the synchronization level 3 refers to: do not carried out with UTC system the synchronous base station of clock or Person can not obtain the base station of self-position.
3. the method as described in claim 1, which is characterized in that further include:
If not receiving the time signal of UTC system in first duration, base station is not received yet or other terminals are sent Synchronization signal, then after the first duration the second duration cut-off when, into synchronization level 3.
4. the method as described in claim 1, which is characterized in that further include:
If the terminal into synchronization level 1 receives the synchronization signal that base station or other terminals send, abandon sending described in The base station of synchronization signal or other terminals carry out clock as synchronisation source and synchronize.
5. a kind of clock synchronizing method characterized by comprising
If terminal receive synchronization level 0 base station send down-bound pilot frequency signal, using the base station of the synchronization level 0 as It is synchronous that synchronisation source carries out clock, and enters synchronization level 1a；
Otherwise, if receiving the synchronization signal of other terminals transmission or awarding for world concordant time UTC system in the first duration When signal, then according to the synchronization level of other terminals will other described terminals as synchronisation source or by UTC system work It is synchronous that clock is carried out for synchronisation source；
Wherein, if the synchronization signal that the terminal for receiving synchronization level 1a in the first duration is sent, by the synchronization level The terminal of 1a carries out clock as synchronisation source and synchronizes, and enters synchronization level 3；Alternatively,
If only receiving the synchronization signal that terminal of the synchronization level not higher than 1 is sent in the first duration, the synchronization level is not It include the terminal of synchronization level 1 in terminal higher than 1, then it is same to carry out clock using the terminal of the synchronization level 1 as synchronisation source Step, and enter synchronization level 2；Alternatively,
If only receiving the synchronization signal that terminal of the synchronization level not higher than 2 is sent in the first duration, the synchronization level is not It include the terminal of synchronization level 2 in terminal higher than 2, then it is same to carry out clock using the terminal of the synchronization level 2 as synchronisation source Step, and enter synchronization level 3；Alternatively,
If the synchronization signal that the terminal for only receiving synchronization level 3 in the first duration is sent, connects according in N number of synchronizing cycle The synchronization signal of all synchronization levels 3 received carries out clock and synchronizes, or the synchronization that will be received in N number of synchronizing cycle In the source terminal of the synchronization signal of grade 3, it is synchronous that time forward terminal as synchronisation source carries out clock, and enters and synchronize Grade 3, wherein N is the integer more than or equal to 1.
6. method as claimed in claim 5, which is characterized in that if the time service for receiving UTC system in the first duration It is synchronous then to carry out clock using the UTC system as synchronisation source for signal, comprising:
If the synchronization signal that the terminal for not receiving synchronization level 1a in the first duration is sent, but receive awarding for UTC system When signal, then it is synchronous to carry out clock using the UTC system as synchronisation source, and enter synchronization level 1.
7. the method as described in any one of claim 5 to 6, which is characterized in that further include:
If the synchronization signal of base station or the transmission of other terminals is not received in first duration, after the first duration When second duration is ended, into synchronization level 3.
8. a kind of terminal characterized by comprising receiving module and synchronization module；
The synchronization module, if receiving the time signal of world concordant time UTC system for the receiving module, by institute It is synchronous as synchronisation source progress clock to state UTC system, and enters synchronization level 1；Otherwise, if in the first duration the reception mould Block receives synchronization signal, then according to the grade of the synchronization signal, using send the synchronization signal terminal or base station as It is synchronous that synchronisation source carries out clock；
Wherein, if the receiving module does not receive the time signal of UTC system in the first duration, but synchronization level is received The down-bound pilot frequency signal that 0 base station is sent, then the synchronization module is specifically used for:
Using the base station of the synchronization level 0 as synchronisation source, compensation is being timed based on range calibration or uplink synchronous calibration On the basis of to carry out clock synchronous, and enter synchronization level 2；Alternatively,
The timing-compensation that clock is synchronized, and configured according to the base station is carried out using the base station of the synchronization level 0 as synchronisation source Enabler flags, into synchronization level 2 or synchronization level 3, the timing-compensation enabler flags are used to indicate whether that enabled timing is mended It repays；Wherein, if timing-compensation is enabled, and the terminal is to be timed compensation based on range calibration or uplink synchronous calibration On the basis of the clock that carries out it is synchronous, then enter synchronization level 2, otherwise enter synchronization level 3, if timing-compensation is not enabled, Then enter synchronization level 2；
Wherein, the base station of the synchronization level 0 refers to: it is synchronous to have carried out clock with UTC system, and can be by down-bound pilot frequency signal The base station broadcasted with the offset of UTC clock.
9. terminal as claimed in claim 8, which is characterized in that the synchronization module is specifically used for:
It, will be described same if the receiving module receives the synchronization signal that the terminal of synchronization level 1 is sent in the first duration The terminal for walking grade 1 carries out clock as synchronisation source and synchronizes, and enters synchronization level 2；Alternatively,
If the receiving module does not receive the synchronization signal that the terminal of synchronization level 1 is sent in the first duration, but receives The terminal of the synchronization level 2 is then carried out clock as synchronisation source and synchronized by the synchronization signal that the terminal of synchronization level 2 is sent, And enter synchronization level 3；Alternatively,
If the receiving module only receives the synchronization signal of the transmission of synchronization level 3 in the first duration, according to N number of synchronization It is synchronous that the synchronization signal of all synchronization levels 3 received in period carries out clock, or will receive in N number of synchronizing cycle To synchronization level 3 synchronization signal source terminal in, it is synchronous that time forward terminal as synchronisation source carries out clock, goes forward side by side Enter synchronization level 3, wherein N is the integer more than or equal to 1；Wherein, the synchronization signal of the synchronization level 3 includes synchronizing The synchronization signal that the terminal of grade 3 and/or base station are sent, the base station of the synchronization level 3 refer to: not carrying out clock with UTC system Synchronous base station or the base station that self-position can not be obtained.
10. terminal as claimed in claim 8, which is characterized in that the synchronization module is also used to:
If the receiving module does not receive the time signal of UTC system in first duration, do not receive yet base station or The synchronization signal that other terminals are sent, then in the second duration cut-off after the first duration, into synchronization level 3.
11. terminal as claimed in claim 8, which is characterized in that the synchronization module is also used to:
If the synchronization signal that the receiving module into the terminal of synchronization level 1 receives base station or other terminals are sent, is abandoned It is synchronous that clock is carried out using the base station for sending the synchronization signal or other terminals as synchronisation source.
12. a kind of terminal characterized by comprising receiving module and synchronization module；
The synchronization module, if for the down-bound pilot frequency signal that the base station that the receiving module receives synchronization level 0 is sent, It is synchronous that clock is carried out using the base station of the synchronization level 0 as synchronisation source, and enters synchronization level 1a；Otherwise, if at first The receiving module receives the synchronization signal of other terminals transmission or the time signal of world concordant time UTC system in long, Then according to synchronization level other terminals by described in of other terminals as synchronisation source or using the UTC system as synchronisation source It is synchronous to carry out clock；
The synchronization module is specifically used for: if the terminal that the receiving module receives synchronization level 1a in the first duration is sent Synchronization signal, then it is synchronous to carry out clock using the terminal of the synchronization level 1a as synchronisation source, and enter synchronization level 3；Or Person,
If the receiving module only receives the synchronization signal that terminal of the synchronization level not higher than 1 is sent, institute in the first duration The terminal including synchronization level 1 in terminal of the synchronization level not higher than 1 is stated, then using the terminal of the synchronization level 1 as synchronization It is synchronous that source carries out clock, and enters synchronization level 2；Alternatively,
If the receiving module only receives the synchronization signal that terminal of the synchronization level not higher than 2 is sent, institute in the first duration The terminal including synchronization level 2 in terminal of the synchronization level not higher than 2 is stated, then using the terminal of the synchronization level 2 as synchronization It is synchronous that source carries out clock, and enters synchronization level 3；Alternatively,
If the receiving module only receives the synchronization signal that the terminal of synchronization level 3 is sent in the first duration, according to N number of The synchronization signal of all synchronization levels 3 received in synchronizing cycle carries out clock and synchronizes, or will be in N number of synchronizing cycle In the source terminal of the synchronization signal of the synchronization level 3 received, it is synchronous that time forward terminal as synchronisation source carries out clock, And enter synchronization level 3, wherein N is the integer more than or equal to 1.
13. terminal as claimed in claim 12, which is characterized in that the synchronization module is specifically used for:
If the receiving module does not receive the synchronization signal that the terminal of synchronization level 1a is sent in the first duration, but receives It is synchronous then to carry out clock using the UTC system as synchronisation source, and enters synchronization level 1 for the time signal of UTC system.
14. terminal described in any one of claim 12 to 13, which is characterized in that the synchronization module is also used to:
If the receiving module does not receive the synchronization signal that base station or other terminals are sent in first duration, the When the second duration after one duration is ended, into synchronization level 3.
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