CN108632980A

CN108632980A - A kind of synchronous method and terminal

Info

Publication number: CN108632980A
Application number: CN201710178820.3A
Authority: CN
Inventors: 赵锐; 赵丽; 房家奕
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-03-23
Filing date: 2017-03-23
Publication date: 2018-10-09
Anticipated expiration: 2037-03-23
Also published as: WO2018171523A1; CN108632980B

Abstract

A kind of synchronous method of present invention offer and terminal solve the problems, such as that according to the presence of existing synchronization level information terminal synchronization level cannot be accurately distinguished.The method of the present invention includes：The synchronizing signal and synchronizing channel sent according to multiple synchronisation sources, the synchronization level instruction information of each synchronisation source is obtained, synchronization level instruction information includes the covering marking that logo collection belonging to the sync id of synchronisation source, the position of resource occupied by synchronizing signal and synchronizing channel are carried；The mapping table of information and synchronization level is indicated according to pre-determined synchronization grade, determine synchronization level corresponding with each synchronisation source synchronization level instruction information, logo collection in mapping table is obtained according to the first sub-mark set, the second sub-mark set and third sub-mark set, and the corresponding synchronization level instruction information of different synchronization levels is different in mapping table；According to determining synchronization level, object synchronization source is chosen in multiple synchronisation sources, is synchronized according to the object synchronization source of selection.

Description

A kind of synchronous method and terminal

Technical field

The present invention relates to the technical field of communications applications more particularly to a kind of synchronous method and terminals.

Background technology

In the simultaneous techniques of Rel-14V2X (Vehicle to X, vehicle-mounted short haul connection), when system configuration or in advance When being configured with three isochronous resources (such as:R1, R2 and R3, wherein R3 are fixed as the outer UE directly synchronous with GNSS of covering Isochronous resources), the priority of terminal synchronisation source be by the position of the resource of occupancy, synchronisation source ID (SSID), and it is synchronous What the covering in_coverage marks indicated in channel PSBCH distinguished.

When eNB is highest priority, the definition of synchronization level is as shown in table 1, it can be seen from Table 1 that, when eNB is When highest priority, P5 and P6 cannot be distinguished by isochronous resources, SSID and PSBCH threes.

Table 1

When GNSS (Global Navigation Satellite System, Global Satellite Navigation System) is that highest is preferential When grade, it is believed that base station eNB is notified that the time difference between the timing of eNB and GNSS, definition such as 2 institute of table of synchronization level Show, it can be seen from Table 2 that, it, can not area by isochronous resources, SSID and PSBCH threes when GNSS is highest priority Divide P3 and P4.

Table 2

Thus, it will be seen that passing through the resource location of synchronizing signal occupancy, SSID and PSBCH threes in the prior art Come determine terminal synchronize priority mode, there are problems that accurately determining the synchronization priority of synchronisation source.

Invention content

The purpose of the present invention is to provide a kind of synchronous method and terminals, to solve to pass through synchronizing signal in the prior art Resource location, SSID and the PSBCH of occupancy, the problem of cannot accurately determining the synchronization priority of synchronisation source.

To achieve the goals above, the present invention provides a kind of synchronous method, are applied to terminal, including：

The synchronizing signal and synchronizing channel sent respectively according to multiple synchronisation sources, the synchronization level for obtaining each synchronisation source refer to Show information, the synchronization level instruction information includes logo collection belonging to the sync id of the synchronisation source, the synchronous letter The covering marking that the position of resource occupied by number and the synchronizing channel are carried, and and and base station interior in base station range The corresponding first sub-mark set of synchronous synchronisation source, in base station range and synchronisation source pair directly synchronous with GNSS The second sub-mark set for answering and outside base station range and the corresponding third mark of synchronisation source directly synchronous with GNSS Know collection and is combined into three mutually different set；

The mapping table of information and synchronization level is indicated according to pre-determined synchronization grade, is determined synchronous with each synchronisation source etc. The corresponding synchronization level of grade instruction information, the logo collection in the mapping table be according to the first sub-mark set, What the second sub-mark set and the third sub-mark set obtained, and synchronization level different in the mapping table Corresponding synchronization level instruction information is different；

According to determining synchronization level, object synchronization source is chosen in multiple synchronisation sources, and according to the object synchronization of selection Source synchronizes.

Wherein, according to determining synchronization level, in multiple synchronisation sources the step of selection object synchronization source, including：

If it is determined that multiple synchronization levels in there are identical synchronization levels, then according to the signal receiving strength of synchronisation source and Determining synchronization level, selection object synchronization source synchronizes in multiple synchronisation sources；

If it is determined that multiple synchronization levels in identical synchronization level is not present, then according to determining synchronization level, choose The highest synchronisation source of synchronization level is as object synchronization source and synchronizes.

Wherein, the step of being synchronized according to the object synchronization source of selection, including：

If the object synchronization source be in base station range and directly with the synchronisation source of base station synchronization or be place In in base station range and synchronisation source directly synchronous with GNSS, then using the sync id in the object synchronization source as terminal Sync id, and by the covering marking of the synchronizing channel of the terminal be set as it is synchronous with the first of the object synchronization source mark Know different second identifiers；

It, will be described if the object synchronization source is synchronisation source outside base station range and directly synchronous with GNSS Sync id of the sync id in object synchronization source as terminal, and set the covering marking of the synchronizing channel of the terminal to Second identifier；

If the object synchronization source be in base station range and indirectly with the synchronisation source of base station synchronization or be place It is in synchronisation source in base station range and indirectly synchronous with GNSS or outside base station range and directly same with GNSS The synchronisation source of step, then according to the sync id in object synchronization source and predetermined threshold value and, obtain the sync id of terminal, and by institute The covering marking for stating the synchronizing channel of terminal is set as second identifier.

Wherein, if GNSS is highest priority；

The mapping table that information and synchronization level are indicated according to pre-determined synchronization grade, determination are same with each synchronisation source The step of step grade instruction information corresponding synchronization level includes：

If the logo collection belonging to the sync id of the synchronisation source is the first default logo collection, the synchronizing signal institute The position for occupying resource is first position or the third place, it is determined that the synchronization level of the synchronisation source is the first estate, described First default logo collection is the sync id pair for the synchronisation source for being less than or equal to double bounce with the synchronous hop count of base station or GNSS The set answered, the first default logo collection include the first sub-mark set, the second sub-mark set and described Third sub-mark set；

If the logo collection belonging to the sync id of the synchronisation source is the first default logo collection, the synchronizing signal institute The position for occupying resource is the second position, and the covering marking is second identifier, it is determined that the synchronization level of the synchronisation source For the second grade；

If the logo collection belonging to the sync id of the synchronisation source is the second default logo collection, the synchronizing signal institute The position for occupying resource is first position or the second position, and the covering marking is second identifier, it is determined that the synchronisation source Synchronization level be the tertiary gradient, the second default logo collection be with the synchronous hop count of base station or GNSS be more than double bounce it is same The corresponding set of sync id in step source, and the second default logo collection is by the value in the described first default logo collection In addition obtained after predetermined threshold value；

Wherein, the priority of described the first estate, the second grade and the tertiary gradient reduces successively.

Wherein, if the logo collection belonging to the sync id of the synchronisation source is the first default logo collection, the synchronization The position of resource occupied by signal is first position or the third place, it is determined that the synchronization level of the synchronisation source is the first estate The step of, including：

If the logo collection of the synchronisation source belongs to the first sub-mark set, the position of resource occupied by the synchronizing signal For first position, and the covering marking is first identifier, it is determined that the synchronization level of institute's synchronisation source is the first estate；Or

If the logo collection of the synchronisation source belongs to the second sub-mark set, the position of resource occupied by the synchronizing signal For first position, and the covering marking is first identifier, it is determined that the synchronization level of institute's synchronisation source is the first estate；Or

If the logo collection of the synchronisation source belongs to third sub-mark set, the position of resource occupied by the synchronizing signal For the third place, and the covering marking is first identifier or second identifier, it is determined that the synchronization level of institute's synchronisation source is first Grade.

Wherein, if the logo collection belonging to the sync id of the synchronisation source is the first default logo collection, the synchronization The position of resource occupied by signal be the second position, and the covering marking be second identifier, it is determined that the synchronisation source it is same The step of grade is the second grade is walked, including：

If the logo collection of the synchronisation source belongs to the first sub-mark set, the position of resource occupied by the synchronizing signal For the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the second grade；Or

If the logo collection of the synchronisation source belongs to the second sub-mark set, the position of resource occupied by the synchronizing signal For the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the second grade；Or

If the logo collection of the synchronisation source belongs to third sub-mark set, the position of resource occupied by the synchronizing signal For the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the second grade.

Wherein, if the logo collection belonging to the sync id of the synchronisation source is the second default logo collection, the synchronization The position of resource occupied by signal is first position or the second position, and the covering marking is second identifier, it is determined that described The step of synchronization level of synchronisation source is the tertiary gradient, including：

If the logo collection of the synchronisation source belongs to the 4th sub-mark set, the position of resource occupied by the synchronizing signal For first position or the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is third Grade, the 4th sub-mark collection is combined into base station range and hop count synchronous with base station is more than the synchronization of double bounce The corresponding set of sync id in source or the corresponding set of sync id in independent synchronization source, and the 4th sub-mark set is By the value in the first sub-mark set plus obtaining after predetermined threshold value；Or

If the logo collection of the synchronisation source belongs to the 5th sub-mark set, the position of resource occupied by the synchronizing signal For first position or the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is third Grade, the 5th sub-mark collection is combined into base station range and hop count synchronous with GNSS's is more than the synchronization of double bounce The corresponding set of sync id in source, and the 5th sub-mark set is added in advance by the value in the second sub-mark set If being obtained after threshold value；Or

If the logo collection of the synchronisation source belongs to the 6th sub-mark set, the position of resource occupied by the synchronizing signal For first position or the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is third Grade, the 6th sub-mark collection is combined into outside base station range and hop count synchronous with GNSS's is more than the synchronization of double bounce The corresponding set of sync id in source, and the 6th sub-mark set is added in advance by the value in the third sub-mark set If being obtained after threshold value.

Wherein, if base station is highest priority；

If the logo collection belonging to the sync id of the synchronisation source is the first sub-mark set, shared by the synchronizing signal It is first position with the position of resource, and the covering marking is first identifier, it is determined that the synchronization level of the synchronisation source is The first estate；

If the logo collection belonging to the sync id of the synchronisation source is the first sub-mark set, shared by the synchronizing signal It is the second position with the position of resource, and the covering marking is second identifier, it is determined that the synchronization level of the synchronisation source is Second grade；

If the logo collection belonging to the sync id of the synchronisation source is third sub-mark set, shared by the synchronizing signal It is the third place with the position of resource, and the covering marking is first identifier or second identifier, it is determined that the synchronisation source Synchronization level is the tertiary gradient；

If the logo collection belonging to the sync id of the synchronisation source is third sub-mark set, shared by the synchronizing signal It is the second position with the position of resource, and the covering marking is second identifier, it is determined that the synchronization level of the synchronisation source is The fourth estate；

If the logo collection belonging to the sync id of the synchronisation source is the 4th sub-mark set or the 6th sub-mark set, The position of resource occupied by the synchronizing signal is first position or the second position, and the covering marking is second identifier, then Determine the synchronisation source synchronization level be the 5th grade, the 4th sub-mark collection be combined into base station range and Synchronous hop count is more than the corresponding set of sync id of the synchronisation source of double bounce or the sync id pair in independent synchronization source with base station The set answered, the 6th sub-mark collection is combined into outside base station range and hop count synchronous with GNSS's is more than double bounce The corresponding set of sync id of synchronisation source, and the 4th sub-mark set is added by the value in the first sub-mark set It is obtained after upper predetermined threshold value, the 6th sub-mark set is to add predetermined threshold value by the value in the third sub-mark set It obtains afterwards；

Wherein, the priority of described the first estate, the second grade, the tertiary gradient, the fourth estate and the 5th grade drops successively It is low.

To achieve the goals above, the embodiments of the present invention also provide a kind of terminals, including：

Acquisition module, synchronizing signal and synchronizing channel for being sent respectively according to multiple synchronisation sources obtain each synchronous The synchronization level in source indicates that information, the synchronization level instruction information include the identification sets belonging to the sync id of the synchronisation source It closes, the covering marking that the position of resource and the synchronizing channel are carried occupied by the synchronizing signal, and covered in base station In range and the first sub-mark set corresponding with the synchronisation source of base station synchronization, in base station range and directly and GNSS The corresponding second sub-mark set of synchronous synchronisation source and outside the base station range and synchronisation source directly synchronous with GNSS Corresponding third sub-mark collection is combined into three mutually different set；

Determining module, the mapping table for indicating information and synchronization level according to pre-determined synchronization grade determine and every The corresponding synchronization level of a synchronisation source synchronization level instruction information, the logo collection in the mapping table are according to described the What one sub-mark set, the second sub-mark set and the third sub-mark set obtained, and in the mapping table The corresponding synchronization level instruction information of different synchronization levels is different；

Synchronization module, for according to determining synchronization level, object synchronization source being chosen in multiple synchronisation sources, and according to choosing The object synchronization source taken synchronizes.

Wherein, the synchronization module includes：

First determination sub-module, for if it is determined that multiple synchronization levels in there are identical synchronization level, then according to same The signal receiving strength in step source and the synchronization level of determination, selection object synchronization source synchronizes in multiple synchronisation sources；

Second determination sub-module, be used for if it is determined that multiple synchronization levels in identical synchronization level, then basis is not present Determining synchronization level is chosen the highest synchronisation source of synchronization level and as object synchronization source and is synchronized.

Wherein, the synchronization module includes：

First synchronizes submodule, if being in base station range and directly same with base station for the object synchronization source The synchronisation source of step or in base station range and synchronisation source directly synchronous with GNSS, then by the object synchronization source Sync id of the sync id as terminal, and set and the target covering marking of the synchronizing channel of the terminal to The different second identifier of first sync id of synchronisation source；

Second synchronizes submodule, if it is outside base station range and directly same with GNSS to be used for the object synchronization source The synchronisation source of step, then using the sync id in the object synchronization source as the sync id of terminal, and by the synchronization of the terminal The covering marking of channel is set as second identifier；

Third synchronizes submodule, if being in base station range and indirectly same with base station for the object synchronization source The synchronisation source of step covers model either for synchronisation source in base station range and indirectly synchronous with GNSS or in base station Enclose outer and synchronisation source directly synchronous with GNSS, then according to the sync id in object synchronization source and predetermined threshold value and, obtain end The sync id at end, and set the covering marking of the synchronizing channel of the terminal to second identifier.

Wherein, if GNSS is highest priority；

The determining module includes：

Third determination sub-module, if it is the first default mark to be used for the logo collection belonging to the sync id of the synchronisation source Gather, the position of resource occupied by the synchronizing signal is first position or the third place, it is determined that the synchronization of the synchronisation source Grade is the first estate, and the first default logo collection is to be less than or equal to double bounce with the synchronous hop count of base station or GNSS The corresponding set of sync id of synchronisation source, the first default logo collection include the first sub-mark set, described the Two sub-mark set and the third sub-mark set；

4th determination sub-module, if it is the first default mark to be used for the logo collection belonging to the sync id of the synchronisation source Gather, the position of resource occupied by the synchronizing signal is the second position, and the covering marking is second identifier, it is determined that institute The synchronization level for stating synchronisation source is the second grade；

5th determination sub-module, if it is the second default mark to be used for the logo collection belonging to the sync id of the synchronisation source Gather, the position of resource occupied by the synchronizing signal is first position or the second position, and the covering marking is the second mark Know, it is determined that the synchronization level of the synchronisation source is the tertiary gradient, and the second default logo collection is and base station or GNSS Synchronous hop count is more than the corresponding set of sync id of the synchronisation source of double bounce, and the second default logo collection is by described the Value in one default logo collection is plus obtaining after predetermined threshold value；

Wherein, the third determination sub-module includes：

First determination unit, if the logo collection for the synchronisation source belongs to the first sub-mark set, the synchronous letter The position of resource occupied by number is first position, and the covering marking is first identifier, it is determined that institute's synchronisation source synchronizes Grade is the first estate；

Second determination unit, if the logo collection for the synchronisation source belongs to the second sub-mark set, the synchronous letter The position of resource occupied by number is first position, and the covering marking is first identifier, it is determined that institute's synchronisation source synchronizes Grade is the first estate；

Third determination unit, if the logo collection for the synchronisation source belongs to third sub-mark set, the synchronous letter The position of resource occupied by number is the third place, and the covering marking is first identifier or second identifier, it is determined that is synchronized The synchronization level in source is the first estate.

Wherein, the 4th determination sub-module includes：

4th determination unit, if the logo collection for the synchronisation source belongs to the first sub-mark set, the synchronous letter The position of resource occupied by number is the second position, and the covering marking is second identifier, it is determined that institute's synchronisation source synchronizes Grade is the second grade；

5th determination unit, if the logo collection for the synchronisation source belongs to the second sub-mark set, the synchronous letter The position of resource occupied by number is the second position, and the covering marking is second identifier, it is determined that institute's synchronisation source synchronizes Grade is the second grade；Or

6th determination unit, if the logo collection for the synchronisation source belongs to third sub-mark set, the synchronous letter The position of resource occupied by number is the second position, and the covering marking is second identifier, it is determined that institute's synchronisation source synchronizes Grade is the second grade.

Wherein, the 5th determination sub-module includes：

7th determination unit, if the logo collection for the synchronisation source belongs to the 4th sub-mark set, the synchronous letter The position of resource occupied by number is first position or the second position, and the covering marking is second identifier, it is determined that is synchronized The synchronization level in source is the tertiary gradient, and the 4th sub-mark collection is combined into synchronous in base station range and with base station Hop count is more than the corresponding set of sync id of the synchronisation source of double bounce or the corresponding set of sync id in independent synchronization source, and institute Stating the 4th sub-mark set is obtained after adding predetermined threshold value by the value in the first sub-mark set；Or

8th determination unit, if the logo collection for the synchronisation source belongs to the 5th sub-mark set, the synchronous letter The position of resource occupied by number is first position or the second position, and the covering marking is second identifier, it is determined that is synchronized The synchronization level in source is the tertiary gradient, and the 5th sub-mark collection is combined into synchronous in base station range and with GNSS Hop count is more than the corresponding set of sync id of the synchronisation source of double bounce, and the 5th sub-mark set is by the second son mark Value in set is known plus obtaining after predetermined threshold value；Or

9th determination unit, if the logo collection for the synchronisation source belongs to the 6th sub-mark set, the synchronous letter The position of resource occupied by number is first position or the second position, and the covering marking is second identifier, it is determined that is synchronized The synchronization level in source is the tertiary gradient, and the 6th sub-mark collection is combined into synchronous outside base station range and with GNSS Hop count is more than the corresponding set of sync id of the synchronisation source of double bounce, and the 6th sub-mark set is by the third mark Value in set is known plus obtaining after predetermined threshold value.

Wherein, if base station is highest priority；

The determining module includes：

6th determination sub-module, if it is the first sub-mark collection to be used for the logo collection belonging to the sync id of the synchronisation source It closes, the position of resource occupied by the synchronizing signal is first position, and the covering marking is first identifier, it is determined that described The synchronization level of synchronisation source is the first estate；

7th determination sub-module, if it is the first sub-mark collection to be used for the logo collection belonging to the sync id of the synchronisation source It closes, the position of resource occupied by the synchronizing signal is the second position, and the covering marking is second identifier, it is determined that described The synchronization level of synchronisation source is the second grade；

8th determination sub-module, if it is third sub-mark collection to be used for the logo collection belonging to the sync id of the synchronisation source It closes, the position of resource occupied by the synchronizing signal is the third place, and the covering marking is first identifier or second identifier, Then determine that the synchronization level of the synchronisation source is the tertiary gradient；

9th determination sub-module, if it is third sub-mark collection to be used for the logo collection belonging to the sync id of the synchronisation source It closes, the position of resource occupied by the synchronizing signal is the second position, and the covering marking is second identifier, it is determined that described The synchronization level of synchronisation source is the fourth estate；

Tenth determination sub-module, if it is the 4th sub-mark collection to be used for the logo collection belonging to the sync id of the synchronisation source It closes or the 6th sub-mark set, the position of resource occupied by the synchronizing signal is first position or the second position, and described is covered Lid is identified as second identifier, it is determined that the synchronization level of the synchronisation source is the 5th grade, and the 4th sub-mark collection is combined into place It is more than the corresponding set of sync id or independence of the synchronisation source of double bounce in the synchronous hop count in base station range and with base station The corresponding set of sync id of synchronisation source, the 6th sub-mark collection are combined into outside base station range and with GNSS's Synchronous hop count is more than the corresponding set of sync id of the synchronisation source of double bounce, and the 4th sub-mark set is by described first For value in sub-mark set plus what is obtained after predetermined threshold value, the 6th sub-mark set is by the third sub-mark set In value plus obtaining after predetermined threshold value；

The embodiment of the present invention has the advantages that：

The above-mentioned technical proposal of the embodiment of the present invention, the synchronizing signal sent respectively according to multiple synchronisation sources and synchronous letter Road obtains the synchronization level instruction information of each synchronisation source；Indicate that information is corresponding with synchronization level according to pre-determined synchronization grade Relation table determines and indicates the corresponding synchronization level of information with each synchronisation source synchronization level, and according to determining synchronization level, Choose object synchronization source in multiple synchronisation sources, and synchronized according to the object synchronization source of selection, in the embodiment of the present invention due to Logo collection in above-mentioned mapping table is according to the first sub-mark set, the second sub-mark set and described What three sub-mark set obtained, and the corresponding synchronization level instruction information of synchronization level different in the mapping table is different Synchronization level corresponding synchronization level instruction information it is different, therefore terminal can determine and synchronisation source according to the correspondence The corresponding synchronization level of synchronization level instruction information, to solve the money occupied in the prior art by synchronizing signal Source position, SSID and PSBCH, the problem of cannot accurately determining the synchronization priority of synchronisation source.

Description of the drawings

Fig. 1 is the work flow diagram of the synchronous method of the embodiment of the present invention；

Fig. 2 be the embodiment of the present invention synchronous method in synchronous hop count illustrate schematic diagram；

Fig. 3 is the first structure block diagram of the terminal of the embodiment of the present invention；

Fig. 4 is the second structure diagram of the terminal of the embodiment of the present invention.

Specific implementation mode

To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with specific implementation Example and attached drawing are described in detail.

The embodiment provides a kind of synchronous method and terminals, solve and are accounted in the prior art by synchronizing signal Resource location, SSID and PSBCH, the problem of cannot accurately determining the synchronization priority of synchronisation source.

As shown in Figure 1, the synchronous method of the embodiment of the present invention, including：

Step 101：The synchronizing signal and synchronizing channel sent respectively according to multiple synchronisation sources, obtains the same of each synchronisation source It walks grade and indicates information, synchronization level instruction information includes logo collection belonging to the sync id of the synchronisation source, institute State the position of resource occupied by synchronizing signal and covering marking that the synchronizing channel is carried, and in base station range And it is the first sub-mark set corresponding with the synchronisation source of base station synchronization, in base station range and directly synchronous with GNSS The corresponding second sub-mark set of synchronisation source and outside the base station range and synchronisation source directly synchronous with GNSS is corresponding Third sub-mark collection is combined into three mutually different set.

In a specific embodiment of the present invention, in terminal and covering directly synchronous with GNSS outside base station range Terminal directly synchronous with GNSS, when sending synchronizing signal and synchronizing channel, there are two different Synchronization Source ID set (the second sub-mark set and third sub-mark set), and this two mark ID set are all with UE's synchronous with eNB in covering First sub-mark set is different.

Step 102：According to pre-determined synchronization grade indicate information and synchronization level mapping table, determine with each it is synchronous Source synchronization level indicates that the corresponding synchronization level of information, the logo collection in the mapping table are according to the first son mark Know what set, the second sub-mark set and the third sub-mark set obtained, and different in the mapping table The corresponding synchronization level instruction information of synchronization level is different.

In the embodiment of the present invention, the logo collection in above-mentioned mapping table includes the first sub-mark set, described Second sub-mark set and the third sub-mark set and respectively by the first sub-mark set, the second sub-mark collection Value in conjunction and the third sub-mark set is plus the 4th sub-mark set, the 5th sub-mark set obtained after predetermined threshold value With the 6th sub-mark set.

When establishing above-mentioned mapping table, by the synchronizing channel of the outer first terminal directly synchronous with GNSS of covering (PSBCH) covering marking can specifically be set to first identifier, such as True, may be alternatively provided as second identifier, such as False.Selection is covered Third terminal of the direct second terminal synchronous with GNSS as synchronisation source outside lid is sending synchronizing signal and synchronizing channel When, synchronisation source ID is identical as the synchronisation source ID of second terminal that the direct and GNSS outside covering is synchronized, and third terminal The covering marking of synchronizing channel (PSBCH) is set to second identifier, such as False.

Fiveth terminal of the 4th indirectly synchronous with the GNSS terminal as synchronisation source is selected, synchronous hop count is big with GNSS's It is jumped in 2, for the 5th terminal when sending synchronizing signal and synchronizing channel, the synchronisation source ID of the 5th terminal is the same of the 4th terminal Step source ID and predetermined threshold value (168) and.In the embodiment of the present invention synchronous hop count definition as shown in Fig. 2, directly with GNSS or The terminal A of base station synchronization, it is 1 jump to synchronize hop count, using terminal A as the terminal B of synchronisation source, synchronizes hop count and is jumped for 2, with terminal B is the terminal C of synchronisation source, and hop count synchronous with GNSS's is 3 jumps.

Specifically, as shown in Table 3 and Table 4, table 3 indicate be GNSS be highest priority when, synchronization level indicate information With the correspondence of synchronization level, what table 4 indicated is base station when being highest priority, and synchronization level indicates information and synchronization level Correspondence.

Table 3

It can be seen from Table 3 that P2 grades include in covering directly in the UE1 of base station synchronization, covering directly and GNSS The synchronous UE2 and outer UE3 directly synchronous with GNSS of covering, the corresponding logo collection of three kinds of synchronizing informations in P2 grades is not It is identical, cover in logo collection directly corresponding with the UE1 of base station synchronization be [2,167], cover in it is directly synchronous with GNSS The corresponding logo collections of UE2 are 1, and the outer corresponding logo collections of UE3 directly synchronous with GNSS of covering are 0.

The corresponding logo collection of three kinds of synchronizing informations in P3 grades is corresponding according to three kinds of synchronizing informations in P2 grades What logo collection obtained, by UE1, logo collection corresponding with the UE4 of base station synchronization is [2,167], indirect by UE2 indirectly The corresponding logo collections of the UE5 synchronous with GNSS are 1, and by UE3, the UE6 corresponding logo collection synchronouss with GNSS is 0 indirectly.

The corresponding logo collections of UE7 in P4 grades are obtained after the covering marking of UE1 is added predetermined threshold value, UE8 Corresponding logo collection is obtained after the covering marking of UE2 is added predetermined threshold value, and the corresponding logo collections of UE9 are by UE3 Covering marking plus what is obtained after predetermined threshold value, the corresponding logo collections of UE10 are that the covering marking of UE1 is added default threshold It is obtained after value.

Table 4

It can be seen from Table 4 that the corresponding logo collections of UE5 in P6 grades are to add the covering marking of UE1 to preset It is obtained after threshold value, the corresponding logo collections of UE6 are obtained after the covering marking of UE3 is added predetermined threshold value, and UE7 is corresponding Logo collection is obtained after the covering marking of UE3 is added predetermined threshold value, and the corresponding logo collections of UE10 are by the covering of UE1 Mark is plus obtaining after predetermined threshold value.

To sum up, according to the first sub-mark set, the second sub-mark set and described in the embodiment of the present invention In the mapping table that three sub-mark set obtain, the corresponding synchronization level instruction information of different synchronization levels is different, terminal A synchronization level corresponding with the synchronization level of synchronisation source instruction information can be determined, according to correspondence to solve Resource location, SSID and the PSBCH occupied in the prior art by synchronizing signal, cannot accurately determine the synchronization of synchronisation source The problem of priority.

Step 103：According to determining synchronization level, object synchronization source is chosen in multiple synchronisation sources, and according to selection Object synchronization source synchronizes.

If it is determined that multiple synchronization levels in identical synchronization level is not present, then according to determining synchronization level, choose The highest synchronisation source of synchronization level is as object synchronization source and synchronizes；If it is determined that multiple synchronization levels in there are identical It is same to choose target then according to the signal receiving strength of synchronisation source and the synchronization level of determination in multiple synchronisation sources for synchronization level Step source synchronizes.

When there are when identical synchronization level, then corresponding to the synchronization of same synchronization level in determining multiple synchronization levels In source, choose and receive the strongest synchronisation source of signal, and according to the synchronization level of selected synchronisation source with it is the multiple synchronous etc. Other synchronization levels except identical synchronization level are removed in grade, choose the highest synchronisation source of synchronization level as object synchronization Source.

Further, in above-mentioned steps 103, the step of being synchronized according to the object synchronization source of selection, including：

If the object synchronization source be in base station range and directly with the synchronisation source of base station synchronization or be place In in base station range and synchronisation source directly synchronous with GNSS, then using the sync id in the object synchronization source as terminal Sync id, and by the covering marking of the synchronizing channel of the terminal be set as it is synchronous with the first of the object synchronization source mark Know different second identifiers.As in table 3 using UE1 as the UE4 of synchronisation source and using UE2 as the UE5 of synchronisation source.

It, will be described if the object synchronization source is synchronisation source outside base station range and directly synchronous with GNSS Sync id of the sync id in object synchronization source as terminal, and set the covering marking of the synchronizing channel of the terminal to Second identifier.As in table 3 using UE3 as the UE6 of synchronisation source.

If the object synchronization source be in base station range and indirectly with the synchronisation source of base station synchronization or be place It is in synchronisation source in base station range and indirectly synchronous with GNSS or outside base station range and directly same with GNSS The synchronisation source of step, then according to the sync id in object synchronization source and predetermined threshold value and, obtain the sync id of terminal, and by institute The covering marking for stating the synchronizing channel of terminal is set as second identifier.Such as UE7, UE8, UE9 and UE10 in table 3.

Further, when GNSS is highest priority, above-mentioned steps 102 specifically include：

Step 1021：If the logo collection belonging to the sync id of the synchronisation source is the first default logo collection, described The position of resource occupied by synchronizing signal is first position or the third place, it is determined that the synchronization level of the synchronisation source is first Grade, the first default logo collection are same less than or equal to the synchronisation source of double bounce with the synchronous hop count of base station or GNSS Step identifies corresponding set, and the first default logo collection includes the first sub-mark set, the second sub-mark collection It closes and the third sub-mark set.The first sub-mark set can be specially [2,167], the second sub-mark set is specially 1, Third sub-mark set is specially 0.

Step 1022：If the logo collection belonging to the sync id of the synchronisation source is the first default logo collection, described The position of resource occupied by synchronizing signal is the second position, and the covering marking is second identifier, it is determined that the synchronisation source Synchronization level be the second grade.

Step 1023：If the logo collection belonging to the sync id of the synchronisation source is the second default logo collection, described The position of resource occupied by synchronizing signal is first position or the second position, and the covering marking is second identifier, it is determined that The synchronization level of the synchronisation source is the tertiary gradient, and the second default logo collection is big with the synchronous hop count of base station or GNSS In the corresponding set of the sync id of the synchronisation source of double bounce, and the second default logo collection is by the described first default mark Value in set is plus obtaining after predetermined threshold value.

Further, above-mentioned steps 1021 include：If the logo collection of the synchronisation source belongs to the first sub-mark set, The position of resource occupied by the synchronizing signal is first position, and the covering marking is first identifier, it is determined that is synchronized The synchronization level in source is the first estate；Or

Further, above-mentioned steps 1022 include：If the logo collection of the synchronisation source belongs to the first sub-mark set, The position of resource occupied by the synchronizing signal is the second position, and the covering marking is second identifier, it is determined that is synchronized The synchronization level in source is the second grade；Or

Further, above-mentioned steps 1023 include：If the logo collection of the synchronisation source belongs to the 4th sub-mark set, The position of resource occupied by the synchronizing signal is first position or the second position, and the covering marking is second identifier, then Determine institute's synchronisation source synchronization level be the tertiary gradient, the 4th sub-mark collection be combined into base station range and with The synchronization hop count of base station is more than the corresponding set of sync id of the synchronisation source of double bounce or the sync id in independent synchronization source corresponds to Set, and the 4th sub-mark set is by the value in the first sub-mark set plus obtaining after predetermined threshold value, When predetermined threshold value is 168, the 4th sub-mark collection is combined into [170,335]；Or

If the logo collection of the synchronisation source belongs to the 5th sub-mark set, the position of resource occupied by the synchronizing signal For first position or the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is third Grade, the 5th sub-mark collection is combined into base station range and hop count synchronous with GNSS's is more than the synchronization of double bounce The corresponding set of sync id in source, and the 5th sub-mark set is added in advance by the value in the second sub-mark set If being obtained after threshold value, the 5th sub-mark set can be in specific table 3 169；Or

If the logo collection of the synchronisation source belongs to the 6th sub-mark set, the position of resource occupied by the synchronizing signal For first position or the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is third Grade, the 6th sub-mark collection is combined into outside base station range and hop count synchronous with GNSS's is more than the synchronization of double bounce The corresponding set of sync id in source, and the 6th sub-mark set is added in advance by the value in the third sub-mark set If being obtained after threshold value, the 6th sub-mark set is specially 168 in table 3.

Further, when base station is highest priority, above-mentioned steps 102 specifically include：

The synchronous method of the embodiment of the present invention, the synchronizing signal and synchronizing channel sent respectively according to multiple synchronisation sources, is obtained The synchronization level of each synchronisation source is taken to indicate information；The correspondence of information and synchronization level is indicated according to pre-determined synchronization grade Table determines synchronization level corresponding with each synchronisation source synchronization level instruction information, and according to determining synchronization level, multiple Object synchronization source is chosen in synchronisation source, and is synchronized according to the object synchronization source of selection, due to above-mentioned in the embodiment of the present invention Logo collection in mapping table is according to the first sub-mark set, the second sub-mark set and third What logo collection obtained, and different same of the corresponding synchronization level instruction information of different in mapping table synchronization level It is different to walk the corresponding synchronization level instruction information of grade, therefore terminal can be determined same with synchronisation source according to the correspondence The corresponding synchronization level of grade instruction information is walked, to solve the resource-niche occupied in the prior art by synchronizing signal The problem of setting, SSID and PSBCH, cannot accurately determining the synchronization priority of synchronisation source.

The embodiments of the present invention also provide a kind of terminals, as shown in figure 3, including：

Acquisition module 301, synchronizing signal and synchronizing channel for being sent respectively according to multiple synchronisation sources obtain each same The synchronization level in step source indicates that information, the synchronization level instruction information include the mark belonging to the sync id of the synchronisation source The covering marking that the position of resource and the synchronizing channel are carried occupied by set, the synchronizing signal, and covered in base station The corresponding first sub-mark set of synchronisation source within the scope of lid and with base station synchronization, in base station range and directly with The corresponding second sub-mark set of synchronisation source that GNSS is synchronized and outside the base station range and directly synchronous with GNSS same The corresponding third sub-mark collection in step source is combined into three mutually different set；

Determining module 302, for according to pre-determined synchronization grade indicate information and synchronization level mapping table, determine with Each synchronisation source synchronization level indicates that the corresponding synchronization level of information, the logo collection in the mapping table are according to What the first sub-mark set, the second sub-mark set and the third sub-mark set obtained, and the mapping table The corresponding synchronization level instruction information of middle different synchronization level is different；

Synchronization module 303, for according to determining synchronization level, choosing object synchronization source, and root in multiple synchronisation sources It is synchronized according to the object synchronization source of selection.

The terminal of the embodiment of the present invention, the synchronization module include：

The terminal of the embodiment of the present invention, if GNSS is highest priority；

The determining module includes：

The terminal of the embodiment of the present invention, the third determination sub-module include：

The terminal of the embodiment of the present invention, the 4th determination sub-module include：

The terminal of the embodiment of the present invention, the 5th determination sub-module include：

The terminal of the embodiment of the present invention, if base station is highest priority；

The determining module includes：

The terminal of the embodiment of the present invention, the synchronizing signal and synchronizing channel sent respectively according to multiple synchronisation sources obtain every The synchronization level of a synchronisation source indicates information；The mapping table of information and synchronization level is indicated according to pre-determined synchronization grade, really Fixed synchronization level corresponding with each synchronisation source synchronization level instruction information, and according to determining synchronization level, in multiple synchronizations Object synchronization source is chosen in source, and is synchronized according to the object synchronization source of selection, due to above-mentioned correspondence in the embodiment of the present invention Logo collection in relation table is according to the first sub-mark set, the second sub-mark set and the third sub-mark What set obtained, and the corresponding synchronization level of synchronization level different in the mapping table indicates that information is different and synchronizes The corresponding synchronization level instruction information of grade is different, therefore terminal can determine synchronous with synchronisation source etc. according to the correspondence The corresponding synchronization level of grade instruction information, to solve the resource location occupied in the prior art by synchronizing signal, SSID and PSBCH, the problem of cannot accurately determining the synchronization priority of synchronisation source.

As shown in figure 4, the terminal includes the embodiments of the present invention also provide one kind：Including：Memory 420, processor 400 and it is stored in the computer program that can be run on memory 420 and on processor 400, the processor 400 is for reading Program in memory 420 executes following process：

Transceiver 410, for sending and receiving data under the control of processor 400.

Wherein, in Fig. 4, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor 400 The various circuits for the memory that the one or more processors and memory 420 of representative represent link together.Bus architecture is also Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can be linked together, these are all It is it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 410 can To be multiple element, that is, includes transmitter and transceiver, the list for being communicated over a transmission medium with various other devices is provided Member.For different user equipmenies, user interface 430, which can also be, external the interface for needing equipment is inscribed, and connection is set Standby including but not limited to keypad, display, loud speaker, microphone, control stick etc..

Processor 400 is responsible for bus architecture and common processing, and memory 420 can store processor 400 and hold Used data when row operation.

Processor 400 be additionally operable to if it is determined that multiple synchronization levels in there are identical synchronization levels, then according to synchronisation source Signal receiving strength and determination synchronization level, in multiple synchronisation sources choosing object synchronization source synchronizes；If it is determined that Identical synchronization level is not present in multiple synchronization levels, then according to determining synchronization level, it is highest same to choose synchronization level Step source is as object synchronization source and synchronizes.

If processor 400 be additionally operable to the object synchronization source be in base station range and directly with base station synchronization Synchronisation source or in base station range and synchronisation source directly synchronous with GNSS, then by the same of the object synchronization source Sync id of the step mark as terminal, and set and the object synchronization covering marking of the synchronizing channel of the terminal to The different second identifier of first sync id in source；If the object synchronization source be outside the base station range and directly with The synchronisation source that GNSS is synchronized, then using the sync id in the object synchronization source as the sync id of terminal, and by the terminal The covering marking of synchronizing channel be set as second identifier；If the object synchronization source is in base station range and indirect Either for synchronisation source in base station range and indirectly synchronous with GNSS or it is in base with the synchronisation source of base station synchronization Outside coverage area of standing and synchronisation source directly synchronous with GNSS, then according to the sync id in object synchronization source and predetermined threshold value With obtain the sync id of terminal, and set the covering marking of the synchronizing channel of the terminal to second identifier.

If it is the first default identification sets that processor 400, which is additionally operable to the logo collection belonging to the sync id of the synchronisation source, It closes, the position of resource occupied by the synchronizing signal is first position or the third place, it is determined that the synchronisation source synchronizes Grade is the first estate, and the first default logo collection is to be less than or equal to the same of double bounce with the synchronous hop count of base station or GNSS The corresponding set of sync id in step source, the first default logo collection include the first sub-mark set, described second Sub-mark set and the third sub-mark set；If the logo collection belonging to the sync id of the synchronisation source is first default The position of logo collection, resource occupied by the synchronizing signal is the second position, and the covering marking is second identifier, then really The synchronization level of the fixed synchronisation source is the second grade；If the logo collection belonging to the sync id of the synchronisation source is second pre- If logo collection, the position of resource occupied by the synchronizing signal is first position or the second position, and the covering marking is Second identifier, it is determined that the synchronization level of the synchronisation source be the tertiary gradient, the second default logo collection be with base station or The synchronization hop count of GNSS be more than double bounce synchronisation source the corresponding set of sync id, and the second default logo collection be by Value in the first default logo collection is plus obtaining after predetermined threshold value；Wherein, described the first estate, the second grade and The priority of three grades reduces successively.

If the logo collection that processor 400 is additionally operable to the synchronisation source belongs to the first sub-mark set, the synchronizing signal The position of occupied resource is first position, and the covering marking is first identifier, it is determined that the synchronization level of institute's synchronisation source For the first estate；If the logo collection of the synchronisation source belongs to the second sub-mark set, the occupied money of the synchronizing signal The position in source is first position, and the covering marking is first identifier, it is determined that the synchronization level of institute's synchronisation source is first etc. Grade；If the logo collection of the synchronisation source belongs to third sub-mark set, the position of resource occupied by the synchronizing signal For the third place, and the covering marking is first identifier or second identifier, it is determined that the synchronization level of institute's synchronisation source is first Grade.

If the logo collection that processor 400 is additionally operable to the synchronisation source belongs to the first sub-mark set, the synchronizing signal The position of occupied resource is the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source For the second grade；If the logo collection of the synchronisation source belongs to the second sub-mark set, the occupied money of the synchronizing signal The position in source is the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is second etc. Grade；If the logo collection of the synchronisation source belongs to third sub-mark set, the position of resource occupied by the synchronizing signal For the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the second grade.

If the logo collection that processor 400 is additionally operable to the synchronisation source belongs to the 4th sub-mark set, the synchronizing signal The position of occupied resource is first position or the second position, and the covering marking is second identifier, it is determined that institute's synchronisation source Synchronization level be the tertiary gradient, the 4th sub-mark collection is combined into the synchronous jump in base station range and with base station Number set corresponding more than the sync id of the synchronisation source of double bounce or the corresponding set of sync id in independent synchronization source, and it is described 4th sub-mark set is obtained after adding predetermined threshold value by the value in the first sub-mark set；If the synchronization The logo collection in source belongs to the 5th sub-mark set, and the position of resource occupied by the synchronizing signal is first position or second It sets, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the tertiary gradient, the 5th sub-mark Collection is combined into base station range and synchronous hop count is more than the corresponding collection of sync id of the synchronisation source of double bounce with GNSS's It closes, and the 5th sub-mark set is obtained after adding predetermined threshold value by the value in the second sub-mark set；Or If the logo collection of the synchronisation source belongs to the 6th sub-mark set, the position of resource occupied by the synchronizing signal is first It sets or the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the tertiary gradient, described 6th sub-mark collection is combined into outside base station range and hop count synchronous with GNSS's is more than the synchronous mark of the synchronisation source of double bounce Know corresponding set, and the 6th sub-mark set is obtained plus after predetermined threshold value by the value in the third sub-mark set It arrives.

If it is the first sub-mark set that processor 400, which is additionally operable to the logo collection belonging to the sync id of the synchronisation source, The position of resource occupied by the synchronizing signal is first position, and the covering marking is first identifier, it is determined that described same The synchronization level in step source is the first estate；

In some embodiments of the invention, a kind of computer readable storage medium is additionally provided, calculating is stored thereon with Machine program, the program realize following steps when being executed by processor：

The synchronizing signal and synchronizing channel sent respectively according to multiple synchronisation sources, the synchronization level for obtaining each synchronisation source refer to Show information, the synchronization level instruction information includes logo collection belonging to the sync id of the synchronisation source, the synchronous letter The covering marking that the position of resource occupied by number and the synchronizing channel are carried, and and and base station interior in base station range The corresponding first sub-mark set of synchronous synchronisation source, in base station range and synchronisation source pair directly synchronous with GNSS The second sub-mark set for answering and outside base station range and the corresponding third mark of synchronisation source directly synchronous with GNSS Know collection and is combined into three mutually different set.

The terminal of the embodiment of the present invention, synchronizing signal that processor 1100 is used to sent respectively according to multiple synchronisation sources and same Channel is walked, the synchronization level instruction information of each synchronisation source is obtained；Information and synchronization level are indicated according to pre-determined synchronization grade Mapping table determines synchronization level corresponding with each synchronisation source synchronization level instruction information, and is synchronized according to determining Grade is chosen object synchronization source in multiple synchronisation sources, and is synchronized according to the object synchronization source of selection, in the embodiment of the present invention Since the logo collection in above-mentioned mapping table is according to the first sub-mark set, the second sub-mark set and institute State what third sub-mark set obtained, and the corresponding synchronization level of synchronization level different in the mapping table indicates information The corresponding synchronization level instruction information of different synchronization levels is different, therefore terminal can determine and same according to the correspondence The corresponding synchronization level of synchronization level instruction information in step source, is occupied by synchronizing signal in the prior art to solve Resource location, SSID and PSBCH, the problem of cannot accurately determining the synchronization priority of synchronisation source.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.

Claims

1. a kind of synchronous method is applied to terminal, which is characterized in that including：

The synchronizing signal and synchronizing channel sent respectively according to multiple synchronisation sources obtains the synchronization level instruction letter of each synchronisation source Breath, synchronization level instruction information include logo collection belonging to the sync id of the synchronisation source, synchronizing signal institute The covering marking that the position of occupancy resource and the synchronizing channel are carried, and and and base station synchronization interior in base station range The corresponding first sub-mark set of synchronisation source, in base station range and synchronisation source directly synchronous with GNSS is corresponding Second sub-mark set and outside the base station range and the corresponding third sub-mark collection of synchronisation source directly synchronous with GNSS It is combined into three mutually different set；

Indicate that the mapping table of information and synchronization level, determination refer to each synchronisation source synchronization level according to pre-determined synchronization grade Show the corresponding synchronization level of information, the logo collection in the mapping table is according to the first sub-mark set, described What the second sub-mark set and the third sub-mark set obtained, and synchronization level different in the mapping table corresponds to Synchronization level instruction information it is different；

According to determining synchronization level, choose object synchronization source in multiple synchronisation sources, and according to the object synchronization source of selection into Row synchronizes.

2. synchronous method according to claim 1, which is characterized in that according to determining synchronization level, in multiple synchronisation sources The step of middle selection object synchronization source, including：

If it is determined that multiple synchronization levels in there are identical synchronization levels, then according to the signal receiving strength of synchronisation source and determination Synchronization level, in multiple synchronisation sources choosing object synchronization source synchronizes；

If it is determined that multiple synchronization levels in identical synchronization level is not present, then according to determining synchronization level, choose and synchronize The highest synchronisation source of grade is as object synchronization source and synchronizes.

3. synchronous method according to claim 1, which is characterized in that the step synchronized according to the object synchronization source of selection Suddenly, including：

If the object synchronization source is in base station range and directly with the synchronisation source of base station synchronization or in base In coverage area of standing and synchronisation source directly synchronous with GNSS, then using the sync id in the object synchronization source as the same of terminal Step mark, and set with first sync id in the object synchronization source not the covering marking of the synchronizing channel of the terminal to Same second identifier；

If the object synchronization source is synchronisation source outside base station range and directly synchronous with GNSS, by the target Sync id of the sync id of synchronisation source as terminal, and the covering marking of the synchronizing channel of the terminal is set as second Mark；

If the object synchronization source is in base station range and indirectly with the synchronisation source of base station synchronization or in base It indirectly synchronouss with GNSS synchronisation source or outside and directly synchronizes in coverage area of standing and with GNSS in base station range Synchronisation source, then according to the sync id in object synchronization source and predetermined threshold value and, obtain the sync id of terminal, and by the end The covering marking of the synchronizing channel at end is set as second identifier.

4. synchronous method according to claim 1, which is characterized in that if GNSS is highest priority；

The mapping table that information and synchronization level are indicated according to pre-determined synchronization grade determines synchronous with each synchronisation source etc. The step of grade instruction information corresponding synchronization level includes：

If the logo collection belonging to the sync id of the synchronisation source is the first default logo collection, occupied by the synchronizing signal The position of resource be first position or the third place, it is determined that the synchronization level of the synchronisation source be the first estate, described first Default logo collection is that the sync id for the synchronisation source for being less than or equal to double bounce with the synchronous hop count of base station or GNSS is corresponding Set, the first default logo collection include the first sub-mark set, the second sub-mark set and the third Sub-mark set；

If the logo collection belonging to the sync id of the synchronisation source is the first default logo collection, occupied by the synchronizing signal The position of resource is the second position, and the covering marking is second identifier, it is determined that the synchronization level of the synchronisation source is the Two grades；

If the logo collection belonging to the sync id of the synchronisation source is the second default logo collection, occupied by the synchronizing signal The position of resource be first position or the second position, and the covering marking be second identifier, it is determined that the synchronisation source it is same Step grade is the tertiary gradient, and the second default logo collection is to be more than the synchronisation source of double bounce with the synchronous hop count of base station or GNSS The corresponding set of sync id, and the second default logo collection is added by the value in the described first default logo collection It is obtained after predetermined threshold value；

5. synchronous method according to claim 4, which is characterized in that if the mark belonging to the sync id of the synchronisation source Collection is combined into the first default logo collection, and the position of resource occupied by the synchronizing signal is first position or the third place, then really The step of synchronization level of the fixed synchronisation source is the first estate, including：

If the logo collection of the synchronisation source belongs to the first sub-mark set, the position of resource occupied by the synchronizing signal is the One position, and the covering marking is first identifier, it is determined that the synchronization level of institute's synchronisation source is the first estate；Or

If the logo collection of the synchronisation source belongs to the second sub-mark set, the position of resource occupied by the synchronizing signal is the One position, and the covering marking is first identifier, it is determined that the synchronization level of institute's synchronisation source is the first estate；Or

If the logo collection of the synchronisation source belongs to third sub-mark set, the position of resource occupied by the synchronizing signal is the Three positions, and the covering marking is first identifier or second identifier, it is determined that the synchronization level of institute's synchronisation source is the first estate.

6. synchronous method according to claim 4, which is characterized in that if the mark belonging to the sync id of the synchronisation source Collection is combined into the first default logo collection, and the position of resource occupied by the synchronizing signal is the second position, and the covering marking For second identifier, it is determined that the step of synchronization level of the synchronisation source is the second grade, including：

If the logo collection of the synchronisation source belongs to the first sub-mark set, the position of resource occupied by the synchronizing signal is the Two positions, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the second grade；Or

If the logo collection of the synchronisation source belongs to the second sub-mark set, the position of resource occupied by the synchronizing signal is the Two positions, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the second grade；Or

If the logo collection of the synchronisation source belongs to third sub-mark set, the position of resource occupied by the synchronizing signal is the Two positions, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the second grade.

7. synchronous method according to claim 4, which is characterized in that if the mark belonging to the sync id of the synchronisation source Collection is combined into the second default logo collection, and the position of resource occupied by the synchronizing signal is first position or the second position, and institute It is second identifier to state covering marking, it is determined that the step of synchronization level of the synchronisation source is the tertiary gradient, including：

If the logo collection of the synchronisation source belongs to the 4th sub-mark set, the position of resource occupied by the synchronizing signal is the One position or the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the tertiary gradient, The 4th sub-mark collection is combined into base station range and synchronous hop count is more than the same of the synchronisation source of double bounce with base station The corresponding set of step mark or the corresponding set of sync id in independent synchronization source, and the 4th sub-mark set is by described Value in first sub-mark set is plus obtaining after predetermined threshold value；Or

If the logo collection of the synchronisation source belongs to the 5th sub-mark set, the position of resource occupied by the synchronizing signal is the One position or the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the tertiary gradient, The 5th sub-mark collection is combined into base station range and synchronous hop count is more than the same of the synchronisation source of double bounce with GNSS's Step identifies corresponding set, and the 5th sub-mark set is to add predetermined threshold value by the value in the second sub-mark set It obtains afterwards；Or

If the logo collection of the synchronisation source belongs to the 6th sub-mark set, the position of resource occupied by the synchronizing signal is the One position or the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is the tertiary gradient, The 6th sub-mark collection is combined into outside base station range and synchronous hop count is more than the same of the synchronisation source of double bounce with GNSS's Step identifies corresponding set, and the 6th sub-mark set is to add predetermined threshold value by the value in the third sub-mark set It obtains afterwards.

8. synchronous method according to claim 1, which is characterized in that if base station is highest priority；

If the logo collection belonging to the sync id of the synchronisation source is the first sub-mark set, the occupied money of the synchronizing signal The position in source is first position, and the covering marking is first identifier, it is determined that the synchronization level of the synchronisation source is first Grade；

If the logo collection belonging to the sync id of the synchronisation source is the first sub-mark set, the occupied money of the synchronizing signal The position in source is the second position, and the covering marking is second identifier, it is determined that the synchronization level of the synchronisation source is second Grade；

If the logo collection belonging to the sync id of the synchronisation source is third sub-mark set, the occupied money of the synchronizing signal The position in source is the third place, and the covering marking is first identifier or second identifier, it is determined that the synchronization of the synchronisation source Grade is the tertiary gradient；

If the logo collection belonging to the sync id of the synchronisation source is third sub-mark set, the occupied money of the synchronizing signal The position in source is the second position, and the covering marking is second identifier, it is determined that the synchronization level of the synchronisation source is the 4th Grade；

If the logo collection belonging to the sync id of the synchronisation source is the 4th sub-mark set or the 6th sub-mark set, described The position of resource occupied by synchronizing signal is first position or the second position, and the covering marking is second identifier, it is determined that The synchronization level of the synchronisation source is the 5th grade, and the 4th sub-mark collection is combined into base station range and and base The synchronization hop count stood set corresponding more than the sync id of the synchronisation source of double bounce or the sync id in independent synchronization source are corresponding Set, the 6th sub-mark collection is combined into outside base station range and hop count synchronous with GNSS's is more than the synchronization of double bounce The corresponding set of sync id in source, and the 4th sub-mark set is added in advance by the value in the first sub-mark set If being obtained after threshold value, the 6th sub-mark set is obtained plus after predetermined threshold value by the value in the third sub-mark set It arrives；

Wherein, the priority of described the first estate, the second grade, the tertiary gradient, the fourth estate and the 5th grade reduces successively.

9. a kind of terminal, which is characterized in that including：

Acquisition module, synchronizing signal and synchronizing channel for being sent respectively according to multiple synchronisation sources, obtains each synchronisation source Synchronization level indicates information, synchronization level instruction information include logo collection belonging to the sync id of the synchronisation source, The covering marking that the position of resource and the synchronizing channel are carried occupied by the synchronizing signal, and it is in base station range It is the corresponding first sub-mark set of interior and with base station synchronization synchronisation source, in base station range and directly synchronous with GNSS The corresponding second sub-mark set of synchronisation source and outside the base station range and directly corresponding with the synchronisation source of GNSS synchronizations Third sub-mark collection be combined into three mutually different set；

Determining module, the mapping table for indicating information and synchronization level according to pre-determined synchronization grade determine and each same Step source synchronization level indicates that the corresponding synchronization level of information, the logo collection in the mapping table are according to first son What logo collection, the second sub-mark set and the third sub-mark set obtained, and it is different in the mapping table Synchronization level corresponding synchronization level instruction information it is different；

Synchronization module, for according to determining synchronization level, object synchronization source being chosen in multiple synchronisation sources, and according to selection Object synchronization source synchronizes.

10. terminal according to claim 9, which is characterized in that the synchronization module includes：

First determination sub-module, for if it is determined that multiple synchronization levels in there are identical synchronization levels, then according to synchronisation source Signal receiving strength and determination synchronization level, in multiple synchronisation sources choosing object synchronization source synchronizes；

Second determination sub-module, be used for if it is determined that multiple synchronization levels in be not present identical synchronization level, then according to determination Synchronization level, choose the highest synchronisation source of synchronization level as object synchronization source and synchronize.

11. terminal according to claim 9, which is characterized in that the synchronization module includes：

First synchronizes submodule, if for the object synchronization source be in base station range and directly with base station synchronization Synchronisation source or in base station range and synchronisation source directly synchronous with GNSS, then by the same of the object synchronization source Sync id of the step mark as terminal, and set and the object synchronization covering marking of the synchronizing channel of the terminal to The different second identifier of first sync id in source；

Second synchronizes submodule, if being outside base station range and directly synchronous with GNSS for the object synchronization source Synchronisation source, then using the sync id in the object synchronization source as the sync id of terminal, and by the synchronizing channel of the terminal Covering marking be set as second identifier；

Third synchronizes submodule, if for the object synchronization source be in base station range and indirectly with base station synchronization Synchronisation source is either for synchronisation source in base station range and indirectly synchronous with GNSS or outside base station range And synchronisation source directly synchronous with GNSS, then according to the sync id in object synchronization source and predetermined threshold value and, obtain terminal Sync id, and set the covering marking of the synchronizing channel of the terminal to second identifier.

12. terminal according to claim 9, which is characterized in that if GNSS is highest priority；

The determining module includes：

Third determination sub-module, if it is the first default identification sets to be used for the logo collection belonging to the sync id of the synchronisation source It closes, the position of resource occupied by the synchronizing signal is first position or the third place, it is determined that the synchronisation source synchronizes Grade is the first estate, and the first default logo collection is to be less than or equal to the same of double bounce with the synchronous hop count of base station or GNSS The corresponding set of sync id in step source, the first default logo collection include the first sub-mark set, described second Sub-mark set and the third sub-mark set；

4th determination sub-module, if it is the first default identification sets to be used for the logo collection belonging to the sync id of the synchronisation source It closes, the position of resource occupied by the synchronizing signal is the second position, and the covering marking is second identifier, it is determined that described The synchronization level of synchronisation source is the second grade；

5th determination sub-module, if it is the second default identification sets to be used for the logo collection belonging to the sync id of the synchronisation source It closes, the position of resource occupied by the synchronizing signal is first position or the second position, and the covering marking is second identifier, Then determine that the synchronization level of the synchronisation source is the tertiary gradient, the second default logo collection is synchronous with base station or GNSS Hop count is more than the corresponding set of sync id of the synchronisation source of double bounce, and the second default logo collection is pre- by described first If value in logo collection is plus obtaining after predetermined threshold value；

13. terminal according to claim 12, which is characterized in that the third determination sub-module includes：

First determination unit, if the logo collection for the synchronisation source belongs to the first sub-mark set, the synchronizing signal institute The position for occupying resource is first position, and the covering marking is first identifier, it is determined that the synchronization level of institute's synchronisation source is The first estate；

Second determination unit, if the logo collection for the synchronisation source belongs to the second sub-mark set, the synchronizing signal institute The position for occupying resource is first position, and the covering marking is first identifier, it is determined that the synchronization level of institute's synchronisation source is The first estate；

Third determination unit, if the logo collection for the synchronisation source belongs to third sub-mark set, the synchronizing signal institute The position for occupying resource is the third place, and the covering marking is first identifier or second identifier, it is determined that institute's synchronisation source Synchronization level is the first estate.

14. terminal according to claim 12, which is characterized in that the 4th determination sub-module includes：

4th determination unit, if the logo collection for the synchronisation source belongs to the first sub-mark set, the synchronizing signal institute The position for occupying resource is the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is Second grade；

5th determination unit, if the logo collection for the synchronisation source belongs to the second sub-mark set, the synchronizing signal institute The position for occupying resource is the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is Second grade；Or

6th determination unit, if the logo collection for the synchronisation source belongs to third sub-mark set, the synchronizing signal institute The position for occupying resource is the second position, and the covering marking is second identifier, it is determined that the synchronization level of institute's synchronisation source is Second grade.

15. terminal according to claim 12, which is characterized in that the 5th determination sub-module includes：

7th determination unit, if the logo collection for the synchronisation source belongs to the 4th sub-mark set, the synchronizing signal institute The position for occupying resource is first position or the second position, and the covering marking is second identifier, it is determined that institute's synchronisation source Synchronization level is the tertiary gradient, and the 4th sub-mark collection is combined into base station range and hop count synchronous with base station Set corresponding more than the sync id of the synchronisation source of double bounce or the corresponding set of sync id in independent synchronization source, and described the Four sub-mark set are obtained after adding predetermined threshold value by the value in the first sub-mark set；Or

8th determination unit, if the logo collection for the synchronisation source belongs to the 5th sub-mark set, the synchronizing signal institute The position for occupying resource is first position or the second position, and the covering marking is second identifier, it is determined that institute's synchronisation source Synchronization level is the tertiary gradient, and the 5th sub-mark collection is combined into base station range and hop count synchronous with GNSS's More than the corresponding set of sync id of the synchronisation source of double bounce, and the 5th sub-mark set is by the second sub-mark collection Value in conjunction is plus obtaining after predetermined threshold value；Or

9th determination unit, if the logo collection for the synchronisation source belongs to the 6th sub-mark set, the synchronizing signal institute The position for occupying resource is first position or the second position, and the covering marking is second identifier, it is determined that institute's synchronisation source Synchronization level is the tertiary gradient, and the 6th sub-mark collection is combined into outside base station range and hop count synchronous with GNSS's More than the corresponding set of sync id of the synchronisation source of double bounce, and the 6th sub-mark set is by the third sub-mark collection Value in conjunction is plus obtaining after predetermined threshold value.

16. terminal according to claim 9, which is characterized in that if base station is highest priority；

The determining module includes：

6th determination sub-module, if it is the first sub-mark set to be used for the logo collection belonging to the sync id of the synchronisation source, The position of resource occupied by the synchronizing signal is first position, and the covering marking is first identifier, it is determined that described same The synchronization level in step source is the first estate；

7th determination sub-module, if it is the first sub-mark set to be used for the logo collection belonging to the sync id of the synchronisation source, The position of resource occupied by the synchronizing signal is the second position, and the covering marking is second identifier, it is determined that described same The synchronization level in step source is the second grade；

8th determination sub-module, if it is third sub-mark set to be used for the logo collection belonging to the sync id of the synchronisation source, The position of resource occupied by the synchronizing signal be the third place, and the covering marking be first identifier or second identifier, then Determine that the synchronization level of the synchronisation source is the tertiary gradient；

9th determination sub-module, if it is third sub-mark set to be used for the logo collection belonging to the sync id of the synchronisation source, The position of resource occupied by the synchronizing signal is the second position, and the covering marking is second identifier, it is determined that described same The synchronization level in step source is the fourth estate；

Tenth determination sub-module, if for the synchronisation source sync id belonging to logo collection be the 4th sub-mark set or 6th sub-mark set, the position of resource occupied by the synchronizing signal are first position or the second position, and covering mark It is second identifier to know, it is determined that the synchronization level of the synchronisation source is the 5th grade, and the 4th sub-mark collection is combined into base Synchronous hop count is more than the corresponding set of sync id or independent synchronization of the synchronisation source of double bounce in coverage area of standing and with base station The corresponding set of sync id in source, the 6th sub-mark collection are combined into synchronous outside base station range and with GNSS Hop count is more than the corresponding set of sync id of the synchronisation source of double bounce, and the 4th sub-mark set is by the first son mark The value in set is known plus what is obtained after predetermined threshold value, and the 6th sub-mark set is by the third sub-mark set Value obtains after adding predetermined threshold value；