CN104469928A

CN104469928A - Interface synchronization method and device based on network interception

Info

Publication number: CN104469928A
Application number: CN201410715451.3A
Authority: CN
Inventors: 王姝杰
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2014-11-28
Filing date: 2014-11-28
Publication date: 2015-03-25
Anticipated expiration: 2034-11-28
Also published as: WO2016082779A1; CN104469928B

Abstract

The invention relates to the field of communication, in particular to an interface synchronization method and device based on network interception. The interface synchronization method and device based on network interception are used for improving synchronization precision and reducing the interference of a micro cell to adjacent cells. The interface synchronization method based on network interception comprises the steps that the micro cell obtains PCI messages of all the adjacent cells, silence subframes configured for all cell levels are kept silent according to the first preset cell level and silence subframe mapping relation, CRSs of the adjacent cells are searched, and the adjacent cells meeting the condition that the SINRs of the CRSs are not smaller than a preset first threshold value meeting the synchronization quality are screened out; then, the adjacent cell with the highest level not smaller than M-1 is selected to be taken as the synchronization source cell of the micro cell, the PCI of the synchronization source cell is recorded, and the cell level, corresponding to the cell level configuration of the synchronization source cell, of the cell is also recorded. By the adoption of the method, synchronization precision is improved, interference of the micro cell to the adjacent cells is reduced, and thus the overall interference level of a system is reduced.

Description

A kind of air interface synchronization method of intercepting Network Based and device

Technical field

The present invention relates to the communications field, particularly relate to a kind of air interface synchronization method of intercepting Network Based and device.

Background technology

Indoor focus (the LTE Hotspot/indoor of Long Term Evolution, LTE-Hi) be the technology adopting the little base station of LTE to meet focus and in-door covering demand, proposed in Release 12 (R12) standardization effort started in September, 2012 by International Standards Organization 3GPP.LTE-Hi is demand in order to meet focus covering scene and gives birth to, and adopts the evolution technology of LTE, possesses higher rate, more low cost, higher frequency efficiency, the objective feature such as controlled.

At present, LTE-Hi Account Dept is deployed in the indoor hot spot region such as large conference room, venue, substantially can realize the LTE-Hi seamless coverage in this region.Under the application scenarios of LTE-Hi, there is multiple adjacent small-cell LTE-Hi small-cell, can be with the alien frequencies frequently or in same frequency band between small-cell, the requirement that between them, demand fulfillment is synchronous.Because if the small-cell step-out in identical band, so will produce serious up-downgoing interference for time division duplex (Time Division Duplexing, TDD) system, cause network to work.Therefore, keep synchronously preventing up-downgoing interference serious in TDD system.At present, LTE-Hi small-cell is operated on the band42 (3.4GHz ~ 3.6GHz) of 3GPP definition, and disposing (as 2.4GHz) with typical macro station is that alien frequencies is disposed completely.Although in theory, the condition that between macrocell and small-cell, a demand fulfillment coexists, but consider the application of the follow-up other technologies characteristic for small-cell introducing, as dynamic TDD, collaborative multicast communication (Coordinated Multiple Points, CoMP) technology etc., synchronously play a great role in the practical application in future between macrocell and small-cell.

In prior art, main adopt the synchronization scenario of following three types to realize between small-cell synchronous, comprising:

One, GPS synchronization scenario, i.e. a built-in GPS in HeNB, be used for receiving GPS synchronizing signal.Adopt GPS directly can obtain extraordinary synchronization accuracy (about 100ns magnitude) as the synchronization scenario with reference to timing, but, because GPS synchronization accuracy under indoor scene can be affected, the synchronous requirement under indoor scene therefore can not be met.

Its two, IEEE 1588v2 synchronization scenario, under good backhaul (backhaul) condition, the optical fiber that such as operator controls or Ethernet, IEEE 1588v2 synchronization scenario can provide the synchronization accuracy of submicrosecond level.But at cable and digital subscriber line (Digital Subscriber Line, DSL) under the backhaul condition that modulator is such, very large shake and Delay Variation can be produced, make uplink packet time delay and downstream packets time delay inconsistent, thus cause error to reach Millisecond, can not synchronisation requirement be met.

They are three years old, terminal (UE) assist in synchronization scheme, the program requires there is identical covering between source and target community, and in overlay area, be in radio resource control (Radio Resource Control, RRC) UE of connection status, network side needs to trigger UE by signaling method and sends upward signal (as Physical Random Access Channel (PhysicalRandom Access Channel, etc.) and the Signalling exchange needing the signaling of S1 or X2 mouth to support between Target cell and cell-of-origin PRACH), in addition, adopt the scheme that UE is auxiliary, for the power consumption of terminal, measurement opportunity, the dependence of the aspects such as mobility is stronger, and these processes will cause synchronous maintenance more difficult.

In addition, under GPS synchronization scenario and the inoperable scene of IEEE 1588 v2 synchronization scenario, network intercepting is a kind of important synchronous method.

Summary of the invention

The embodiment of the present invention provides a kind of air interface synchronization method of intercepting Network Based and device, and in order to solve in prior art, to there is synchronization accuracy low, the synchronous problem keeping difficulty.

The concrete technical scheme that the embodiment of the present invention provides is as follows:

An air interface synchronization method of intercepting Network Based, comprising:

Microcell obtains the Physical Cell Identifier PCI information of each adjacent cell that can detect;

Microcell is according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the cell reference signals CRS of adjacent cell, the signal to noise ratio SINR value filtering out CRS is not less than the adjacent cell that the first default synchronizing quality requires threshold value;

The synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains in Microcell, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, wherein, M is positive integer, represents maximum synchronous jumping figure.

Therefore, adopt method of the present invention, effectively improve synchronization accuracy, reduce Microcell to the interference of adjacent area, thus reduce the overall interference level of system.For not judging the situation that whether has macro station to cover in the scene of current deployment Microcell, the air interface synchronization method of intercepting Network Based that the present invention provides needing the application scenarios to whether there is macro base station to distinguish, is not applicable to any scene of LTE-Hi system picocell deployment.

Preferably, Microcell obtains the PCI information of each adjacent cell that can detect, specifically comprises:

After Microcell starts, detect near the center frequency point of at least one Long Term Evolution indoor focus LTE-Hi system and receive the master sync signal PSS that other adjacent cells send, and continuing based on the PSS detected the auxiliary synchronous signals SSS detecting the transmission of corresponding adjacent cell;

Microcell completes frame synchronization based on PSS and SSS received and adjacent cell;

Microcell, according to PSS and the SSS information of adjacent cell, obtains the PCI information of adjacent cell.

Preferably, the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains in Microcell, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, wherein, M is positive integer, represents maximum synchronous jumping figure, specifically comprises:

The highest and the level of Microcell screening acquisition level be not less than M-1 and the maximum adjacent cell of SINR value as self synchronisation source community, or, to be not less than at least one adjacent cell of M-1 random selecting adjacent cell as the synchronisation source community of self from screening the highest and level of the level that obtains;

The PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community is that the level of synchronisation source community adds 1.

Preferably, comprise further:

Carried out pre-configured to Microcell before Microcell starts, be specially:

If Microcell does not configure open dynamic TDD algorithm, then for any one in Microcell configuration TDD ascending-descending subframes configuration 1-6, and configure the first mapping relations of cell hierarchy and the subframe of mourning in silence preset and the second mapping relations of cell hierarchy and subframe of mourning in silence;

If dynamic TDD algorithm is opened in Microcell configuration, then for any one in Microcell configuration TDD ascending-descending subframes configuration 0-6, and the cell hierarchy preset of configuration and the first mapping relations of subframe of mourning in silence and the second mapping relations of cell hierarchy and subframe of mourning in silence.

Therefore, the cell hierarchy preset and the first mapping relations of subframe of mourning in silence are adopted to mourn in silence to Microcell the configuration of subframe, in this layoutprocedure, the unified situation considering various sub-frame configuration, layoutprocedure is simple, and do not need to distinguish specifically have employed which kind of sub-frame configuration, especially under the application scenarios opening TDD algorithm, the Advantages found of this collocation method more obvious.

Preferably, the PCI of recording synchronism cell-of-origin, and after the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, comprise further:

According to the mourn in silence subframe of the cell hierarchy preset with the first mapping relations micro cell deployment of subframe of mourning in silence, be the Microcell of m for cell hierarchy, the 9th of m radio frames of listening periods subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, and the Microcell of 1 is greater than for m value, the 1st of listening periods the 9th subframe to m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m represents cell hierarchy, and span is 1 to M.

Preferably, comprise further:

Microcell determine the cell hierarchy of self be 1 in M-1 arbitrary grade time, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the first default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

When Microcell determines that the cell hierarchy of self is M, periodically judge whether to arrive the synchronized update cycle of presetting, if so, then when determining that the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, synchronous process of establishing is re-executed; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting Microcell is less than the first default synchronizing quality and requires threshold value further, and the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load threshold value, if meet, then re-execute synchronous process of establishing; If do not meet, maintain the synchronous regime between current sync cell-of-origin.

In order to avoid synchronization accuracy difference between the Microcell that clock drift etc. brings, adopt method of the present invention can carry out periodically synchronous maintenance to completing the synchronous Microcell set up, complete with the synchronous of corresponding synchronisation source community and calibrate, for junior community, community, periodically can carry out synchronisation source cell update, to find the synchronisation source community that community higher grade as early as possible, improve synchronization accuracy.

Preferably, comprise further:

If the cell hierarchy of adjacent cell that Microcell screening obtains be not 0 in M-1 arbitrary grade time, then judge that from as out-of-sync cells, the PCI of recording synchronism cell-of-origin be-1, and the cell hierarchy that the cell hierarchy of corresponding synchronisation source community configures self is-1.

Preferably, comprise further:

If Microcell is according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of adjacent cell, and determine that the SINR value of CRS of the adjacent cell searched all is less than the first default synchronizing quality and requires threshold value, then judge whether Microcell is isolated community further;

If so, then using Microcell self as accurate time service synchronisation source, recording synchronism cell-of-origin PCI is the PCI of Microcell self, and the cell hierarchy of micro cell deployment is-1;

Otherwise, obtain the Synchronization Status Message of the top n adjacent cell that periphery Reference Signal Received Power RSRP value sorts from big to small, determine to exist in N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of at least one adjacent cell, the SINR value filtering out CRS is not less than the adjacent cell that the second default synchronizing quality requires threshold value, and choose the highest adjacent cell of level or the isolated community synchronisation source community as self from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, cell hierarchy 1 ', (M-1) cell hierarchy 1 ' is equal to, M-1.

Preferably, judge whether Microcell is isolated community, specifically comprises:

When judging that the circuit loss value between Microcell and each adjacent cell detected is less than default line loss threshold, determine that Microcell is isolated community;

Or

When judging that the RSRP value between Microcell and each adjacent cell detected is less than default RSRP thresholding, determine that Microcell is isolated community.

Preferably, comprise further:

Microcell is determined when as isolated community, when Microcell judges to arrive the synchronized update cycle of presetting, judge whether that the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding further, if so, synchronous process of establishing is then re-executed; Otherwise, using the local clock of self as with reference to timing, maintain self synchronous regime.

Preferably, when self is determined not for isolated community in Microcell, the highest adjacent cell of level or the isolated community synchronisation source community as self is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, specifically comprise:

The highest and the level of Microcell screening acquisition level be not less than M-1 and the maximum adjacent cell of SINR value as self synchronisation source community, or, from screening at least one the highest adjacent cell of the level that obtains random selecting adjacent cell as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community is that the level of synchronisation source community adds 1.

Or

Microcell determines that at least one isolated community that screening obtains, random selecting isolated community is as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is 1 '.

Preferably, comprise further:

Microcell determines that cell hierarchy that N number of adjacent cell is non-isolated community or N number of adjacent cell is not the arbitrary level in 1 ' to (M-1) ', then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, comprise further:

Microcell determine to exist in N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of at least one adjacent cell, and determine that the SINR value of CRS of the adjacent cell searched all is less than the second default synchronizing quality and requires threshold value, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, comprise further:

When Microcell determines that the cell hierarchy of self is in 1 ' to (M-1) ' arbitrary grade, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the second default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

When Microcell determines that the cell hierarchy of self is M ', periodically judge whether to arrive the synchronized update cycle of presetting, if so, then when determining that the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, synchronous process of establishing is re-executed; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting Microcell is less than the second default synchronizing quality and requires threshold value further, and the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, if meet, then re-execute synchronous process of establishing; If do not meet, maintain the synchronous regime between current sync cell-of-origin; Wherein, cell hierarchy M ' is equal to cell hierarchy M.

Preferably, comprise further:

Carried out pre-configured to Microcell before Microcell starts, be specially:

According to the mourn in silence subframe of the cell hierarchy preset with the first mapping relations micro cell deployment of subframe of mourning in silence, be the Microcell of m ' for cell hierarchy, the 9th of M+m radio frames of listening periods subframe is configured to multicast single frequency network MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, and the Microcell of 1 ' is greater than for m ' value, the M+1 of listening periods the 9th subframe to M+m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m ' represents cell hierarchy, span is 1 ' to M '.

Preferably, Microcell judges, certainly as behind out-of-sync cells, to comprise further:

Microcell judges whether to arrive the synchronized update cycle of presetting, and if so, then re-executes synchronous process of establishing; Otherwise, maintain current state.

Therefore, adopt method of the present invention, can alarm in time re-establish synchronous when arriving the synchronized update cycle for the Microcell being in desynchronizing state, improve the operating efficiency of Microcell.

An air interface synchronization device of intercepting Network Based, comprising:

Acquiring unit, for obtaining the Physical Cell Identifier PCI information of each adjacent cell that can detect;

Processing unit, according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the cell reference signals CRS of adjacent cell, the signal to noise ratio SINR value filtering out CRS is not less than the adjacent cell that the first default synchronizing quality requires threshold value;

And for choosing from screening in the adjacent cell that obtains the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, wherein, M is positive integer, represents maximum synchronous jumping figure.

Preferably, when obtaining the PCI information of each adjacent cell that can detect, acquiring unit specifically for:

After startup, detect near the center frequency point of at least one Long Term Evolution indoor focus LTE-Hi system and receive the master sync signal PSS that other adjacent cells send, and continuing based on the PSS detected the auxiliary synchronous signals SSS detecting the transmission of corresponding adjacent cell;

Frame synchronization is completed based on PSS and SSS received and adjacent cell;

According to PSS and the SSS information of adjacent cell, obtain the PCI information of adjacent cell.

Preferably, the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community, processing unit specifically for:

The highest and the level of screening acquisition level be not less than M-1 and the maximum adjacent cell of SINR value as self synchronisation source community, or, to be not less than at least one adjacent cell of M-1 random selecting adjacent cell as the synchronisation source community of self from screening the highest and level of the level that obtains;

Preferably, comprise further:

Pre-configured unit, specifically for:

Open dynamic TDD algorithm if do not configure, then for any one in Microcell configuration TDD ascending-descending subframes configuration 1-6, and configure the first mapping relations of cell hierarchy and the subframe of mourning in silence preset and the second mapping relations of cell hierarchy and subframe of mourning in silence;

If dynamic TDD algorithm is opened in configuration, then for any one in Microcell configuration TDD ascending-descending subframes configuration 0-6, and the cell hierarchy preset of configuration and the first mapping relations of subframe of mourning in silence and the second mapping relations of cell hierarchy and subframe of mourning in silence.

Preferably, comprise further:

Dispensing unit, for the subframe of mourning in silence of the first mapping relations micro cell deployment according to the cell hierarchy preset and subframe of mourning in silence, be the Microcell of m for cell hierarchy, the 9th of m radio frames of listening periods subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, the 1st of listening periods the 9th subframe to m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m represents cell hierarchy, and span is 1 to M.

Preferably, comprise further:

Synchronous holding unit, for determine the cell hierarchy of self be 1 in M-1 arbitrary grade time, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the first default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

And when the cell hierarchy determining self is M, periodically judge whether to arrive the synchronized update cycle of presetting, if so, then when determining that the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, synchronous process of establishing is re-executed; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting Microcell is less than the first default synchronizing quality and requires threshold value further, and the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load threshold value, if meet, then re-execute synchronous process of establishing; If do not meet, maintain the synchronous regime between current sync cell-of-origin.

Preferably, comprise further:

Processing unit be used for screen the cell hierarchy of adjacent cell obtained be not 0 in M-1 arbitrary grade time, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, processing unit is further used for:

If according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of adjacent cell, and determine that the SINR value of CRS of the adjacent cell searched all is less than the first default synchronizing quality and requires threshold value, then determine whether isolated community further;

Preferably, when determining whether isolated community, processing unit specifically for:

Or

Preferably, comprise further:

Synchronous holding unit, for determining when as isolated community, when Microcell judges to arrive the synchronized update cycle of presetting, judge whether that the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding further, if so, synchronous process of establishing is then re-executed; Otherwise, using the local clock of self as with reference to timing, maintain self synchronous regime.

Preferably, when determining self not for isolated community, the highest adjacent cell of level or the isolated community synchronisation source community as self is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community, processing unit specifically for:

The highest and the level of screening acquisition level is not less than (M-1) ' and the maximum adjacent cell of SINR value as self synchronisation source community, or, from screening at least one the highest adjacent cell of the level that obtains random selecting adjacent cell as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community is that the level of synchronisation source community adds 1.

Or

Determine that at least one isolated community that screening obtains, random selecting isolated community is as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is 1 '.

Preferably, processing unit is further used for:

For determining that cell hierarchy that N number of adjacent cell is non-isolated community or N number of adjacent cell is not the arbitrary level in 1 ' to (M-1) ', then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, processing unit is further used for:

For determine to exist in N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of at least one adjacent cell, and determine that the SINR value of CRS of the adjacent cell searched all is less than the second default synchronizing quality and requires threshold value, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, comprise further:

Synchronous holding unit, for when determining that the cell hierarchy of self is in 1 ' to (M-1) ' arbitrary grade, whenever judging to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the second default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

And when the cell hierarchy for determining self is M ', periodically judge whether to arrive the synchronized update cycle of presetting, if, then when determining that the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, re-execute synchronous process of establishing; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting Microcell is less than the second default synchronizing quality and requires threshold value further, and the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, if meet, then re-execute synchronous process of establishing; If do not meet, maintain the synchronous regime between current sync cell-of-origin; Wherein, cell hierarchy M ' is equal to cell hierarchy M.

Preferably, comprise further:

Pre-configured unit, specifically for:

Preferably, comprise further:

Dispensing unit, for the subframe of mourning in silence of the second mapping relations micro cell deployment according to the cell hierarchy preset and subframe of mourning in silence, be the Microcell of m ' for cell hierarchy, the 9th of M+m radio frames of listening periods subframe is configured to multicast single frequency network MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, the M+1 of listening periods the 9th subframe to M+m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m ' represents cell hierarchy, and span is 1 ' to M '.

Preferably, judge, certainly as behind out-of-sync cells, to comprise further:

Step-out administrative unit, arriving the synchronized update cycle of presetting for judging whether, if so, then re-executing synchronous process of establishing; Otherwise, maintain current state.

Air interface synchronization device of intercepting Network Based comprises: processor, transceiver and a memory, wherein:

Processor, for reading the program in memory, performs following process:

The Physical Cell Identifier PCI information of each adjacent cell that acquisition can detect; According to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the cell reference signals CRS of adjacent cell, the signal to noise ratio SINR value filtering out CRS is not less than the adjacent cell that the first default synchronizing quality requires threshold value;

And for choosing from screening in the adjacent cell that obtains the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, wherein, M is positive integer, represents maximum synchronous jumping figure;

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

Preferably, when obtaining the PCI information of each adjacent cell that can detect, processor specifically for:

Preferably, the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community, processor specifically for:

Preferably, comprise further:

Processor, specifically for:

Preferably, comprise further:

Processor, for the subframe of mourning in silence of the first mapping relations micro cell deployment according to the cell hierarchy preset and subframe of mourning in silence, be the Microcell of m for cell hierarchy, the 9th of m radio frames of listening periods subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, the 1st of listening periods the 9th subframe to m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m represents cell hierarchy, and span is 1 to M.

Preferably, comprise further:

Processor, for determine the cell hierarchy of self be 1 in M-1 arbitrary grade time, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the first default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

Preferably, comprise further:

Processor be used for screen the cell hierarchy of adjacent cell obtained be not 0 in M-1 arbitrary grade time, then judge that from as out-of-sync cells, the PCI of recording synchronism cell-of-origin be-1, and the cell hierarchy that the cell hierarchy of corresponding synchronisation source community configures self is-1.

Preferably, processor is further used for:

Preferably, when determining whether isolated community, processor specifically for:

Or

Preferably, comprise further:

Processor, for determining when as isolated community, when Microcell judges to arrive the synchronized update cycle of presetting, judge whether that the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding further, if so, synchronous process of establishing is then re-executed; Otherwise, using the local clock of self as with reference to timing, maintain self synchronous regime.

Preferably, when determining self not for isolated community, the highest adjacent cell of level or the isolated community synchronisation source community as self is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community, processor specifically for:

Or

Preferably, comprise further:

Processor is not the arbitrary level in 1 ' to (M-1) ' for the cell hierarchy determined N number of adjacent cell and be non-isolated community or N number of adjacent cell, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, comprise further:

Processor be used for determining existing in N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of at least one adjacent cell, and determine that the SINR value of CRS of the adjacent cell searched all is less than the second default synchronizing quality and requires threshold value, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, comprise further:

Processor, for when determining that the cell hierarchy of self is in 1 ' to (M-1) ' arbitrary grade, whenever judging to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the second default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

Preferably, comprise further:

Processor, specifically for:

Preferably, comprise further:

Processor, for the subframe of mourning in silence of the second mapping relations micro cell deployment according to the cell hierarchy preset and subframe of mourning in silence, be the Microcell of m ' for cell hierarchy, the 9th of M+m radio frames of listening periods subframe is configured to multicast single frequency network MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, the M+1 of listening periods the 9th subframe to M+m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m ' represents cell hierarchy, and span is 1 ' to M '.

Preferably, judge, certainly as behind out-of-sync cells, to comprise further:

Processor, arriving the synchronized update cycle of presetting for judging whether, if so, then re-executing synchronous process of establishing; Otherwise, maintain current state.

Wherein, bus architecture can comprise interconnected bus and the bridge of any amount, and the various electrical chains of the memory of the one or more processor specifically represented by processor and memory representative are connected together.Other electrical chains various of such as ancillary equipment, pressurizer and management circuit etc. and so on can also be connected together by bus architecture, and these are all known in the field, therefore, are no longer described further it herein.Bus interface provides interface.Transceiver can be multiple element, namely comprises transmitter and transceiver, is provided for the unit communicated with other devices various over a transmission medium.Processor is in charge of bus architecture and common process, and memory can the data that use when executable operations of storage of processor.

Accompanying drawing explanation

Fig. 1 is the general introduction flow chart of the air interface synchronization method A intercepted Network Based in the embodiment of the present invention;

Fig. 2 is the first mapping relations schematic diagram by cell hierarchy and subframe of mourning in silence in the embodiment of the present invention;

Fig. 3 is the general introduction flow chart of the air interface synchronization method B intercepted Network Based in the embodiment of the present invention;

Fig. 4 is the second mapping relations schematic diagram by cell hierarchy and subframe of mourning in silence in the embodiment of the present invention;

Fig. 5 A and 5B is the particular flow sheet of air interface synchronization method of intercepting Network Based in the embodiment of the present invention;

Fig. 6 to be embodiment of the present invention small area level be 1 and 2 or 1 ' and 2 ' the particular flow sheet of synchronous maintenance;

To be embodiment of the present invention small area level be Fig. 73 or the synchronized update of 3 ' and the particular flow sheet of maintenance;

Fig. 8 is embodiment of the present invention small area level is the synchronized update of isolated community and the particular flow sheet of maintenance;

Fig. 9 is the particular flow sheet that embodiment of the present invention small area level is defined as the step-out management of out-of-sync cells;

Figure 10 and Figure 11 is the general introduction flow chart of air interface synchronization device of intercepting Network Based in the embodiment of the present invention.

Embodiment

Low for there is synchronization accuracy in solution prior art, the synchronous problem keeping difficulty, in the embodiment of the present invention, provide a kind of air interface synchronization method of intercepting Network Based and device, Microcell obtains physical district ID (the Physical Cell ID of all adjacent cells, PCI) information, according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for cell reference signals (the Cell-specific reference signals of adjacent cell, CRS), filter out demodulation signal to noise ratio (the Signal to Interference plus Noise Ratio of CRS, SINR) value is not less than the adjacent cell that the first default synchronizing quality requires threshold value, further, choose the synchronisation source community of adjacent cell as self that the highest and level of wherein level is not less than M-1, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, wherein, M is positive integer, represent maximum synchronous jumping figure.

Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.

Microcell in the present invention refers to the Microcell under LTE-Hi system, when Microcell is self-contained have a GPS device time, determine that the cell hierarchy of this Microcell is 0, recording synchronism cell-of-origin PCI is the PCI of this Microcell self.Cell hierarchy is 0 is highest ranking.

In actual applications, the synchronization accuracy of maximum synchronous jumping figure to Microcell has a significant impact, and the synchronization accuracy of the larger then Microcell of maximum synchronous jumping figure is lower, therefore, in order to ensure higher synchronization accuracy, needs the value size limiting maximum synchronous jumping figure.In actual applications, the span of suggestion be greater than 1 integer, acquiescence value be 3.In the present invention, with maximum synchronous jumping figure N _layerNumvalue is 3 is example, is described in detail to following execution mode.

Consult shown in Fig. 1, in the embodiment of the present invention, the idiographic flow of the air interface synchronization intercepted Network Based is as follows:

Step 100: Microcell obtains the PCI information of each adjacent cell that can detect.

Concrete, after the starting up of Microcell, detect near at least one center frequency point, and receive master sync signal (the Primary Synchronization Signal of other adjacent cells transmission, PSS), further the secondary synchronizing signal (SecondarySynchronization Signal, SSS) detecting the transmission of corresponding adjacent cell is continued to the PSS detected.Microcell completes frame synchronization based on PSS and SSS received and adjacent cell; , and according to PSS and the SSS information of adjacent cell, obtain the PCI information of adjacent cell

Step 110: Microcell is according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the cell reference signals CRS of adjacent cell, the SINR value filtering out CRS is not less than the adjacent cell that the first default synchronizing quality requires threshold value.

Step 120: the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains in Microcell, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, wherein, M is positive integer, represents maximum synchronous jumping figure.

Concrete, the highest and the level of level that Microcell screening obtains is not less than the adjacent cell of M-1 may more than one, therefore the highest and level of Microcell screening acquisition level be not less than M-1 and the maximum adjacent cell of SINR value as self synchronisation source community, or, random selecting adjacent cell is not less than multiple adjacent cells of M-1 as the synchronisation source community of self from screening the highest and level of the level that obtains, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community is that the level of synchronisation source community adds 1.Such as, the cell hierarchy of synchronisation source community is 1, then Microcell is 2 according to the cell hierarchy of synchronisation source cell configuration self.

After the cell hierarchy of the cell hierarchy configuration of the PCI in recording synchronism cell-of-origin and corresponding synchronisation source community self, also need to configure according to the first mapping relations of the cell hierarchy preset and subframe of mourning in silence subframe of mourning in silence to Microcell, be the Microcell of m for cell hierarchy, the 9th of m radio frames of listening periods subframe is configured to multicast single frequency network (Multimedia Broadcast multicast service SingleFrequency Network, MBSFN, MBSFN) subframe, as subframe of mourning in silence, for intercepting the CRS of adjacent cell, wherein m represents cell hierarchy, and the Microcell of 1 is greater than for m value, the 1st of listening periods the 9th subframe to m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, span is 1 to M, consult shown in table 1.

Wherein, listening periods refers to that Microcell all needs again to intercept the CRS signal of adjacent area or synchronisation source community every certain time interval, to guarantee that the signal to noise ratio of the CRS signal be currently received meets synchronisation requirement.

Comprise three row contents in table 1, be respectively a layer grade, intercept radio frames position and subframe position of mourning in silence, the line number of table should be identical with maximum synchronous jumping figure.

Table 1

In addition, for the Microcell of not opening TDD algorithm and unlatching TDD algorithm, also need specifically to distinguish when subframe is mourned in silence in the first mapping relations configuration according to the cell hierarchy preset and subframe of mourning in silence.

Carried out pre-configured to Microcell before Microcell starts, be specially:

If Microcell does not configure open dynamic TDD algorithm, then for any one in Microcell configuration TDD ascending-descending subframes configuration 1-6, avoid adopting sub-frame configuration 0 as far as possible, and configure the first mapping relations of cell hierarchy and the subframe of mourning in silence preset and the second mapping relations of cell hierarchy and subframe of mourning in silence.

Such as, consult shown in Fig. 2 and table 1, the cell hierarchy preset and the first mapping relations of subframe of mourning in silence are adopted to mourn in silence to Microcell the configuration of subframe, wherein, TDD ascending-descending subframes is configured to 1, and maximum synchronous jumping figure is 3, and subframe of mourning in silence adopts the mode of MBSFN to be configured, when listening periods is 512 frames, the Microcell for entering listening periods for the first time:

If the cell hierarchy of Microcell is 1, the 9th of radio frames 0 the subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell;

If the cell hierarchy of Microcell is 2, the 9th of radio frames 1 the subframe being configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the CRS of adjacent cell, the 9th of radio frames 0 the subframe being configured to MBSFN sub-frame, as collaborative subframe of mourning in silence;

If the cell hierarchy of Microcell is 3, the 9th of radio frames 2 the subframe being configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the CRS of adjacent cell, the 9th subframe of radio frames 0 and radio frames 1 being configured to MBSFN sub-frame, as collaborative subframe of mourning in silence.

Wherein, collaborative subframe of mourning in silence can be configured according to the disturbed condition in actual environment, if the interference in actual environment is less, can consider not configure collaborative subframe of mourning in silence.

When Microcell second time enters listening periods, if the cell hierarchy of Microcell is 1, the 9th of radio frames 512 the subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell;

If the cell hierarchy of Microcell is 2, the 9th of radio frames 513 the subframe being configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the CRS of adjacent cell, the 9th of radio frames 512 the subframe being configured to MBSFN sub-frame, as collaborative subframe of mourning in silence;

If the cell hierarchy of Microcell is 3, the 9th of radio frames 514 subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the CRS of adjacent cell, 9th subframe of radio frames 512 and radio frames 513 is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence.

When Microcell third time enters listening periods, if the cell hierarchy of Microcell is 1, the 9th of radio frames 0 the subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell;

Circulation said process, adopts the cell hierarchy preset and the first mapping relations of subframe of mourning in silence to mourn in silence to Microcell the configuration of subframe.

The first mapping relations of cell hierarchy and the subframe of mourning in silence preset are adopted to be the mourn in silence feature of configuration of subframe of Microcell, in this layoutprocedure, the unified situation considering various sub-frame configuration, layoutprocedure is simple, and do not need to distinguish specifically have employed which kind of sub-frame configuration, especially under the application scenarios opening TDD algorithm, the Advantages found of this collocation method more obvious.

Further, in order to avoid synchronization accuracy difference between the Microcell that clock drift etc. brings, also needing to carry out periodically synchronous maintenance to completing the synchronous Microcell set up, completing with the synchronous of corresponding synchronisation source community and calibrating.

For cell hierarchy be 1 or M-1 in the Microcell of arbitrary grade, whenever Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of this Microcell is less than the first default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin.

Be the Microcell of M for cell hierarchy, for meeting the requirement of synchronization accuracy, these Microcells can not as the synchronisation source community of other Microcells, therefore need periodically to carry out the synchronisation source cell update that layer, sync grade is the Microcell of M, to find the synchronisation source community that community higher grade as early as possible, improve synchronization accuracy.

Concrete, be the Microcell of M for cell hierarchy, Microcell periodically judges whether to arrive the synchronized update cycle of presetting, if, then when determining that the uplink load of this Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, re-execute synchronous process of establishing; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting this Microcell is less than the first default synchronizing quality and requires threshold value further, and the uplink load of this Microcell is less than default uplink load thresholding and downlink load is less than default downlink load threshold value, if meet, then re-execute synchronous process of establishing; If do not meet, then maintain the synchronous regime between current sync cell-of-origin.

On the other hand, if the cell hierarchy of adjacent cell that Microcell screening obtains be not 0 in M-1 arbitrary grade time, then judge that the PCI of recording synchronism cell-of-origin is-1 certainly as out-of-sync cells, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

Above content is the situation that the SINR value having searched CRS for Microcell is not less than that the first default synchronizing quality requires the adjacent cell of threshold value, Microcell therefrom filters out the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, or, the highest level of the adjacent cell that Microcell screening obtains is 3, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

The SINR value of the CRS of the adjacent cell searched for Microcell below is all less than the situation that the first default synchronizing quality requires the adjacent cell of threshold value, and for this kind of Microcell, consult shown in Fig. 3, the idiographic flow of the air interface synchronization intercepted Network Based is as follows:

Step 300: Microcell is according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of adjacent cell, and determine that the SINR value of CRS of the adjacent cell searched all is less than the first default synchronizing quality and requires threshold value, then judge whether this Microcell is isolated community further.If determine, this Microcell is for isolated community, then perform step 310; If determine, this Microcell is non-isolated community, then perform step 320.

Concrete, isolated community judgment criterion, specifically comprises two kinds of situations:

One, when judging that the circuit loss value between Microcell and each adjacent cell detected is less than default line loss threshold, determines that this Microcell is for isolated community.

Its two, when judging that the RSRP value between Microcell and each adjacent cell detected is less than default RSRP thresholding, determine that this Microcell is for isolated community.

Step 310: this Microcell is for isolated community if determine, then using this Microcell self as accurate time service synchronisation source, recording synchronism cell-of-origin PCI is the PCI of this Microcell self, and the cell hierarchy configuring this Microcell is-1.

When Microcell is determined, when as isolated community, also to need to carry out synchronized update and maintenance to self.Concrete, when Microcell judges to arrive the synchronized update cycle of presetting, judge whether that the uplink load of this Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding further, if so, then re-execute synchronous process of establishing; Otherwise, using the local clock of self as with reference to timing, maintain self synchronous regime.

Step 320: this Microcell is non-isolated community if determine, then obtain the Synchronization Status Message of the top n adjacent cell that periphery Reference Signal Received Power RSRP value sorts from big to small, determine to exist in N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be not 0, 1 ', in 2 ' when arbitrary grade, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of at least one adjacent cell, the SINR value filtering out CRS is not less than the adjacent cell that the second default synchronizing quality requires threshold value, and choose the highest adjacent cell of level or the isolated community synchronisation source community as self from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self, wherein, cell hierarchy 1 ', 2 ' is equal to cell hierarchy 1, 2.

In the application process of reality, in the environment at place, Microcell, there is macro station to cover, if or do not have macro station to cover, but include self-contained when having a Microcell of GPS in the Microcell of this intra-zone administration, macro station or self-containedly have the Microcell of GPS can as the accurate time service synchronisation source community of other target Microcells, for target Microcell provides synchronization timing reference.In this case, the SINR value of the CRS of the adjacent cell searched for Microcell is all less than the situation that the first default synchronizing quality requires the adjacent cell of threshold value, for this kind of Microcell, judges whether this Microcell is isolated community further.If determine, this Microcell is for isolated community, then using this Microcell self as accurate time service synchronisation source, recording synchronism cell-of-origin PCI is the PCI of this Microcell self, and the cell hierarchy configuring this Microcell is-1, if determine, this Microcell is non-isolated community, then directly judge that this Microcell is as out-of-sync cells.

But in actual sets network process, for not judging the situation that whether has macro station to cover in the scene of current deployment Microcell, the air interface synchronization method of intercepting Network Based that the present invention provides needing the application scenarios to whether there is macro base station to distinguish, is not applicable to any scene of LTE-Hi system picocell deployment.

Concrete, screening acquisition level the highest and level in Microcell is not less than (M-1) ' and the maximum adjacent cell of SINR value as self synchronisation source community, or, from screening at least one the highest adjacent cell of the level that obtains random selecting adjacent cell as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community is that the level of synchronisation source community adds 1.Such as, the cell hierarchy of synchronisation source community is 1 ', then Microcell is 2 ' according to the cell hierarchy of synchronisation source cell configuration self.

Or Microcell determines that at least one isolated community that screening obtains, random selecting isolated community is as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is 1 '.

After the cell hierarchy of the cell hierarchy configuration of the PCI in recording synchronism cell-of-origin and corresponding synchronisation source community self, also need to configure according to the second mapping relations of the cell hierarchy preset and subframe of mourning in silence subframe of mourning in silence to Microcell, be the Microcell of m ' for cell hierarchy, the 9th of M+m radio frames of listening periods subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, and the Microcell of 1 ' is greater than for m ' value, the M+1 of listening periods the 9th subframe to M+m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m ' represents cell hierarchy, span is 1 ' to M ', consult shown in table 2.

Comprise three row contents in table 2, be respectively a layer grade, intercept radio frames position and subframe position of mourning in silence, the line number of table should be identical with maximum synchronous jumping figure.

Table 2

In addition, for the Microcell of not opening TDD algorithm and unlatching TDD algorithm, also need specifically to distinguish when subframe is mourned in silence in the second mapping relations configuration according to the cell hierarchy preset and subframe of mourning in silence.Carried out pre-configured to Microcell before Microcell starts, be specially:

Such as, consult shown in Fig. 4 and table 2, the cell hierarchy preset and the second mapping relations of subframe of mourning in silence are adopted to mourn in silence to Microcell the configuration of subframe, wherein, TDD ascending-descending subframes is configured to 1, and maximum synchronous jumping figure is 3, and subframe of mourning in silence adopts the mode of MBSFN to be configured, be still 512 frames for listening periods, the Microcell for entering listening periods for the first time:

If the cell hierarchy of Microcell is 1 ', the 9th of the radio frames 3 of listening periods the subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell;

If the cell hierarchy of Microcell is 2 ', the 9th of the radio frames 4 of listening periods the subframe being configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the CRS of adjacent cell, the 9th of radio frames 3 the subframe being configured to MBSFN sub-frame, as collaborative subframe of mourning in silence;

If the cell hierarchy of Microcell is 3 ', the 9th of the radio frames 5 of listening periods subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the CRS of adjacent cell, 9th subframe of radio frames 3 and radio frames 4 is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence.

When Microcell third time enters listening periods, start new cyclic process, adopt the cell hierarchy preset and the second mapping relations of subframe of mourning in silence to mourn in silence to Microcell the configuration of subframe.

Further, be 1 ' to the M ' Microcell of arbitrary grade for cell hierarchy, in order to avoid synchronization accuracy difference between the Microcell that clock drift etc. brings, also needing to carry out periodically synchronous maintenance to completing the synchronous Microcell set up, completing with the synchronous of corresponding synchronisation source community and calibrating.

For the Microcell that cell hierarchy is 1 ' to (M-1) ' arbitrary grade, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of this Microcell is less than the second default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

Be the Microcell of M ' for cell hierarchy, periodically judge whether to arrive the synchronized update cycle of presetting, if so, then when determining that the uplink load of this Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, synchronous process of establishing is re-executed; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting this Microcell is less than the second default synchronizing quality and requires threshold value further, and the uplink load of this Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, if meet, then re-execute synchronous process of establishing; If do not meet, maintain the synchronous regime between current sync cell-of-origin.Wherein, cell hierarchy 3 ' is equal to cell hierarchy 3.

On the other hand, Microcell is according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of adjacent cell, the SINR value of the CRS of the adjacent cell searched all is less than the first default synchronizing quality and requires threshold value, Microcell obtains the Synchronization Status Message of the top n adjacent cell that periphery Reference Signal Received Power RSRP value sorts from big to small further, determine cell hierarchy that N number of adjacent cell is non-isolated community or N number of adjacent cell not for for 1 ', arbitrary level in (M-1) ', then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

In above-described embodiment, Microcell is judged as out-of-sync cells and specifically comprises following three kinds of situations:

One, if Microcell is according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of adjacent cell, the SINR value filtering out CRS is not less than the adjacent cell that the first default synchronizing quality requires threshold value, and determine that the highest level of screening the adjacent cell obtained is 3, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

They are two years old, if Microcell is according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of adjacent cell, the SINR value of the CRS of the adjacent cell searched all is less than the first default synchronizing quality and requires threshold value, Microcell obtains the Synchronization Status Message of the top n adjacent cell that periphery Reference Signal Received Power RSRP value sorts from big to small further, determine that cell hierarchy that N number of adjacent cell is non-isolated community or N number of adjacent cell is not the arbitrary level in 1 ' to (M-1) ', then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

They are three years old, if Microcell is according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of adjacent cell, the SINR value of the CRS of the adjacent cell searched all is less than the first default synchronizing quality and requires threshold value, Microcell obtains the Synchronization Status Message of the top n adjacent cell that periphery Reference Signal Received Power RSRP value sorts from big to small further, determine to exist in N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and the CRS of search at least one adjacent cell described, and determine that the SINR value of CRS of the adjacent cell searched all is less than the second default synchronizing quality and requires threshold value, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

Further, 3 are equaled for maximum synchronous jumping figure, for the Microcell that layer grade is 3 or 3 ', for meeting synchronization accuracy requirement, can not as the synchronisation source community of other target Microcells, but for be deployed in layer grade be 3 or 3 ' Microcell near Microcell, if the start of this Microcell, will to layer grade be 3 or 3 ' small-cell produce serious interference, and this Microcell does not meet the Rule of judgment of isolated community, for this Microcell, need to carry out step-out process.

Concrete, when Microcell judges after certainly as out-of-sync cells, Microcell judges whether to arrive the synchronized update cycle of presetting, and if so, then re-executes synchronous process of establishing; Otherwise, maintain current state.

Consult shown in table 3, for M=3, the corresponding relation of community grade and synchronisation source community is specific as follows:

Table 3

Below in conjunction with concrete application scenarios, further description is made to above-described embodiment.

Consult shown in Fig. 5 A and 5B, the synchronous Establishing process of Microcell is specific as follows:

Step 501: after the start of Microcell, download relevant configuration information.

Wherein, the level of default community and the second mapping relations of the first mapping relations of subframe of mourning in silence and the level of community and subframe of mourning in silence are comprised in configuration information.

Step 502: Microcell is detected and received the PSS of other adjacent cells transmission near at least one center frequency point.

Step 503: the SSS detecting the transmission of corresponding adjacent cell is continued based on the PSS detected in Microcell.The adjacent cell that Microcell detects with each respectively based on PSS and SSS received completes frame synchronization.

Step 504: Microcell judges whether to get each and the local PCI information reaching the adjacent cell of frame synchronization, if so, then performs step 505; Otherwise, perform step 503;

Step 505: Microcell, according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence.

Step 506: the CRS of adjacent cell, according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, is searched in Microcell.

Step 507: if the SINR value that Microcell filters out CRS is not less than the adjacent cell that the first default synchronizing quality requires threshold value, determines the cell list satisfied condition, perform step 508; If the SINR value of the CRS of the adjacent cell that Microcell searches all is less than the first default synchronizing quality require threshold value, perform step 514.

Wherein, the first synchronizing quality requires that the span of threshold value is [-12 ,-5] dB, and acquiescence value is-10dB.

Step 508: Microcell judges whether comprise the adjacent cell that cell hierarchy is 0 in this cell list, if so, performs step 509, otherwise, perform step 510.

Step 509: the adjacent cell that at least one cell hierarchy is 0 if exist, the synchronisation source community of the highest adjacent cell of the SINR value of CRS as self is chosen in Microcell, or random selecting cell hierarchy is that the adjacent cell of 0 is as self synchronisation source community, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community be the level of synchronisation source community is 1, this Microcell enters into synchronous keep-process.

Step 510: Microcell judges whether comprise the adjacent cell that cell hierarchy is 1 in this cell list, if so, performs step 511, otherwise, perform step 512.

Step 511: the adjacent cell that at least one cell hierarchy is 1 if exist, the synchronisation source community of the highest adjacent cell of the SINR value of CRS as self is chosen in Microcell, or random selecting cell hierarchy is that the adjacent cell of 1 is as self synchronisation source community, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community be the level of synchronisation source community is 2, this Microcell enters into synchronous keep-process.

Step 512: Microcell judges whether comprise the adjacent cell that cell hierarchy is 2 in this cell list, if so, performs step 513, otherwise, perform step 527.

Step 513: the adjacent cell that at least one cell hierarchy is 2 if exist, the synchronisation source community of the highest adjacent cell of the SINR value of CRS as self is chosen in Microcell, or random selecting cell hierarchy is that the adjacent cell of 2 is as self synchronisation source community, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community be the level of synchronisation source community is 3, this Microcell enters into synchronized update and keep-process.

Step 514: Microcell judges whether self is isolated community, if so, performs step 515; Otherwise, perform step 516.

When the RSRP value determining between this Microcell and each adjacent cell detected is less than default line loss threshold, this Microcell is isolated community, and wherein, the span of RSRP value is [-120 ,-50] dBm, gives tacit consent to value-100dBm.

Step 515: Microcell self is as accurate time service synchronisation source, and recording synchronism cell-of-origin PCI is the PCI of this Microcell self, and the cell hierarchy configuring this Microcell is-1, and this Microcell enters into synchronized update and keep-process.

Step 516: the PCI of recording synchronism cell-of-origin, Microcell is-1, the cell hierarchy of Microcell configuration self is-1.

At this moment synchronisation source community is not found in Microcell, the PCI of synchronisation source community for-1 and small cell hierarchy for-1 being intermediateness, not as output state, also need flow process below to determine self synchronisation source community and cell hierarchy further.

Step 517: Microcell sort from big to small to periphery RSRP value after top n adjacent cell send S1AP message, the value of N is positive integer.

Step 518: Microcell obtains the Synchronization Status Message of the top n adjacent cell that periphery RSRP value sorts from big to small.

Wherein, Synchronization Status Message comprises cell hierarchy and the synchronisation source cell information of this N number of adjacent cell.

Step 519: if Microcell determine to exist in this N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ', 2 ' arbitrary grade time, then perform step 519; If Microcell determines that cell hierarchy that this N number of adjacent cell is non-isolated community or this N number of adjacent cell is not the arbitrary level in 1 ', 2 ', then perform step 527.

Step 520: Microcell, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence.

Step 521: the CRS of adjacent cell, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, is searched in Microcell.

Step 522: if the SINR value that Microcell filters out CRS is not less than the adjacent cell that the second default synchronizing quality requires threshold value, if at least one adjacent cell filtered out is isolated community, perform step 523; If the community grade of at least one adjacent cell filtered out is 1 ', 2 ', determine the cell list satisfied condition, perform step 524.Preferentially filter out the adjacent cell that community grade is 1 ', 2 '.

If the SINR value of the CRS of the adjacent cell that Microcell searches all is less than the second default synchronizing quality require threshold value, then perform step 527.

Wherein, the second synchronizing quality requires that the span of threshold value is [-12 ,-5] dB, and acquiescence value is-10dB.

Step 523: Microcell determines that at least one isolated community that screening obtains, random selecting isolated community is as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Step 524: Microcell judges whether comprise the adjacent cell that cell hierarchy is 1 ' in this cell list, if so, performs step 525, otherwise, perform step 526.

Step 525: the adjacent cell that at least one cell hierarchy is 1 ' if exist, the synchronisation source community of the highest adjacent cell of the SINR value of CRS as self is chosen in Microcell, or random selecting cell hierarchy is that the adjacent cell of 1 ' is as self synchronisation source community, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community be the level of synchronisation source community is 2 ', this Microcell enters into synchronous keep-process.

Step 526: there is the adjacent cell that at least one cell hierarchy is 2 ', the synchronisation source community of the highest adjacent cell of the SINR value of CRS as self is chosen in Microcell, or random selecting cell hierarchy is that the adjacent cell of 2 ' is as self synchronisation source community, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community be the level of synchronisation source community is 3 ', this Microcell enters into synchronized update and keep-process.

Step 527: determine that this Microcell is out-of-sync cells, enter step-out management process.

For be defined as 1 and 2 or 1 ' and 2 ' Microcell, after completing synchronous process of establishing, enter into synchronous keep-process.Consult shown in Fig. 6, cell hierarchy be 1 and 2 or 1 ' and 2 ' Microcell, require that thresholding equals default second synchronizing quality and requires threshold value for the first synchronizing quality preset, concrete synchronous keep-process is as follows:

Step 601: Microcell determine self synchronisation source community and the layer, sync grade of self be 1 and 2 or 1 ' and 2 ' time, maintain the synchronous regime between current sync cell-of-origin.

Step 602: Microcell judges whether to arrive the synchronous hold period preset, and if so, performs step 603, otherwise, perform step 601.

The span of synchronous hold period is [640,1280,2560,5120,10240,20480] ms, suggestion value 5120ms.In order to ensure that Microcell finds fast, this cycle needs the integral multiple for Microcell discovery reference signal (Discovery reference signals, DRS).

Step 603: Microcell judges whether the SINR value of the CRS of the synchronisation source community of self is greater than the first default synchronizing signal quality requirement threshold value, if so, then performs step 601, otherwise, perform step 604.

Step 604: Microcell re-executes synchronous process of establishing.

For the Microcell being defined as 3 or 3 ', after completing synchronous process of establishing, enter into synchronized update and keep-process.Consult shown in Fig. 7, cell hierarchy is the Microcell of 3 or 3 ', performs following synchronized update and synchronous keep-process:

Step 701: Microcell determine self synchronisation source community and the layer, sync grade of self be 3 or 3 ' time, maintain the synchronous regime between current sync cell-of-origin.

Step 702: Microcell judges whether to arrive the synchronized update cycle of presetting, and if so, performs step 705, otherwise performs step 703.

The span in synchronized update cycle be tens seconds to hundreds of second, suggestion value 60s.

Step 703: Microcell judges whether to arrive the synchronous hold period preset, and if so, performs step 704, otherwise, perform step 701.

Step 704: Microcell judges whether the SINR value of the CRS signal of the synchronisation source community of self is greater than the first default synchronizing signal quality requirement threshold value, if so, then performs step 701, otherwise performs step 705.

Step 705: Microcell judge whether that the uplink load of self is less than default uplink load thresholding and downlink load is less than default downlink load thresholding time, if so, then perform step 706, otherwise, perform step 701.Wherein the span of uplink load thresholding and downlink load thresholding is [0,30%], suggestion value 30%.

Step 706: Microcell re-executes synchronous process of establishing.

Wherein, when upgrading synchronisation source community, the uplink and downlink load level of Microcell will meet certain threshold requirement, and the calculating detailed process of load is as follows:

First, calculate up-downgoing actual load, determine ought for the previous period in the actual load level of Microcell.When up actual load lower than the uplink load thresholding preset and descending actual load lower than the descending thresholding preset time, think that the load of this Microcell is comparatively light, synchronized update process can be re-executed, regain synchronisation source community and do not affect payload traffic.Calculate actual load computational methods:

Downlink load computing formula:

R _{d_actual}=Num _{pRB_d}/ R_dl_total formula 1

Uplink load computing formula:

R _{u_actual}=Num _{pRB_u}/ R_ul_total formula 2

Wherein Num _{pRB_d}, Num _{pRB_u}be respectively descending and up all having and be carried on Physical Resource Block (physical resourceblock, the PRB) number taken in average each chronomere (radio frames) in a load measurement period.

R_dl_total is the PRB sum that in a load measurement period, average each chronomere (radio frames) can supply Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) channel to use.

R_ul_total is the PRB sum that in a load measurement period, average each chronomere (radio frames) can supply Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH) channel to use.

In order to reduce computation complexity, above-mentioned carry calculation process, if achieve the calculating of foregoing in a device in existing algoritic module, directly can be obtained by the mode of the interface between design and other algoritic modules, to be retrieved as example from up-downgoing dispatching algorithm module, directly to export above-mentioned amount of calculation by up, descending scheduling module and keep and the use of synchronized update process to synchronous.

For the Microcell being defined as isolated community, after completing synchronous process of establishing, enter into synchronized update and keep-process.Consult shown in Fig. 8, Microcell is isolated community, performs following synchronized update and synchronous keep-process:

Step 801: Microcell, using the local clock of self as with reference to timing, maintains self synchronous regime.

Step 802: Microcell judges whether to arrive the synchronized update cycle of presetting, and if so, then performs step 803, otherwise performs step 801.

Step 803: Microcell judge whether that the uplink load of self is less than default uplink load thresholding and downlink load is less than default downlink load thresholding time, if so, then perform step 804, otherwise, perform step 801.

Step 804: Microcell re-executes synchronous process of establishing.

For the Microcell being defined as out-of-sync cells, owing to not finding synchronisation source community, enter into step-out management process.Consult shown in Fig. 9, the idiographic flow tool of step-out management is as follows:

Step 901: Microcell determine from as synchronisation source community PCI value be-1, cell hierarchy is-1.

Step 902: Microcell outputting alarm information, shows Microcell step-out.

Step 903: Microcell judges whether to arrive the synchronized update cycle of presetting, and if so, performs step 904, otherwise, perform step 905.

Step 904: Microcell re-executes synchronous process of establishing.

Step 905: Microcell maintains current state.

Consult shown in Figure 10, air interface synchronization device of intercepting Network Based, comprising:

Acquiring unit 1000, for obtaining the Physical Cell Identifier PCI information of each adjacent cell that can detect;

Processing unit 1010, according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the cell reference signals CRS of adjacent cell, the signal to noise ratio SINR value filtering out CRS is not less than the adjacent cell that the first default synchronizing quality requires threshold value;

Preferably, when obtaining the PCI information of each adjacent cell that can detect, acquiring unit 1000 specifically for:

Preferably, the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community, processing unit 1010 specifically for:

Preferably, comprise further:

Pre-configured unit 1020, specifically for:

Preferably, comprise further:

Dispensing unit 1030, for the subframe of mourning in silence of the first mapping relations micro cell deployment according to the cell hierarchy preset and subframe of mourning in silence, be the Microcell of m for cell hierarchy, the 9th of m radio frames of listening periods subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, the 1st of listening periods the 9th subframe to m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m represents cell hierarchy, and span is 1 to M.

Preferably, comprise further:

Synchronous holding unit 1040, for determine the cell hierarchy of self be 1 in M-1 arbitrary grade time, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the first default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

Preferably, comprise further:

Processing unit 1010 for screen the cell hierarchy of adjacent cell obtained be not 0 in M-1 arbitrary grade time, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, processing unit 1010 is further used for:

Preferably, when determining whether isolated community, processing unit 1010 specifically for:

Or

Preferably, comprise further:

Synchronous holding unit 1040, for determining when as isolated community, when Microcell judges to arrive the synchronized update cycle of presetting, judge whether that the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding further, if so, synchronous process of establishing is then re-executed; Otherwise, using the local clock of self as with reference to timing, maintain self synchronous regime.

Preferably, when determining self not for isolated community, the highest adjacent cell of level or the isolated community synchronisation source community as self is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community, processing unit 1010 specifically for:

Or

Preferably, comprise further:

Processing unit is not the arbitrary level in 1 ' to (M-1) ' for the cell hierarchy determined N number of adjacent cell and be non-isolated community or N number of adjacent cell, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, comprise further:

Processing unit 1010 for determine to exist in N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of at least one adjacent cell, and determine that the SINR value of CRS of the adjacent cell searched all is less than the second default synchronizing quality and requires threshold value, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, comprise further:

Synchronous holding unit 1040, for when determining that the cell hierarchy of self is in 1 ' to (M-1) ' arbitrary grade, whenever judging to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the second default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

Preferably, comprise further:

Pre-configured unit 1020, specifically for:

Preferably, comprise further:

Dispensing unit 1030, for the subframe of mourning in silence of the second mapping relations micro cell deployment according to the cell hierarchy preset and subframe of mourning in silence, be the Microcell of m ' for cell hierarchy, the 9th of M+m radio frames of listening periods subframe is configured to multicast single frequency network MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, the M+1 of listening periods the 9th subframe to M+m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m ' represents cell hierarchy, and span is 1 ' to M '.

Preferably, judge, certainly as behind out-of-sync cells, to comprise further:

Step-out administrative unit 1050, arriving the synchronized update cycle of presetting for judging whether, if so, then re-executing synchronous process of establishing; Otherwise, maintain current state.

Based on above-described embodiment, consult shown in Figure 11, in the embodiment of the present invention, air interface synchronization device of intercepting Network Based comprises processor 1100, transceiver 1110 and memory 1120, wherein:

Processor 1100, for reading the program in memory 1120, performs following process:

Transceiver 1110, for receiving and sending data under the control of processor 1100.

Preferably, when obtaining the PCI information of each adjacent cell that can detect, processor 1100 specifically for:

Preferably, the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community, processor 1100 specifically for:

Preferably, comprise further:

Processor 1100, specifically for:

Preferably, comprise further:

Processor 1100, for the subframe of mourning in silence of the first mapping relations micro cell deployment according to the cell hierarchy preset and subframe of mourning in silence, be the Microcell of m for cell hierarchy, the 9th of m radio frames of listening periods subframe is configured to MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, the 1st of listening periods the 9th subframe to m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m represents cell hierarchy, and span is 1 to M.

Preferably, comprise further:

Processor 1100, for determine the cell hierarchy of self be 1 in M-1 arbitrary grade time, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the first default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

Preferably, comprise further:

Processor 1100 for screen the cell hierarchy of adjacent cell obtained be not 0 in M-1 arbitrary grade time, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, processor 1100 is further used for:

Preferably, when determining whether isolated community, processor 1100 specifically for:

Or

Preferably, comprise further:

Processor 1100, for determining when as isolated community, when Microcell judges to arrive the synchronized update cycle of presetting, judge whether that the uplink load of Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding further, if so, synchronous process of establishing is then re-executed; Otherwise, using the local clock of self as with reference to timing, maintain self synchronous regime.

Preferably, when determining self not for isolated community, the highest adjacent cell of level or the isolated community synchronisation source community as self is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding synchronisation source community, processor 1100 specifically for:

Or

Preferably, comprise further:

Processor 1100 is not the arbitrary level in 1 ' to (M-1) ' for the cell hierarchy determined N number of adjacent cell and be non-isolated community or N number of adjacent cell, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, comprise further:

Processor 1100 for determine to exist in N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of at least one adjacent cell, and determine that the SINR value of CRS of the adjacent cell searched all is less than the second default synchronizing quality and requires threshold value, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self is-1.

Preferably, comprise further:

Processor 1100, for when determining that the cell hierarchy of self is in 1 ' to (M-1) ' arbitrary grade, whenever judging to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of Microcell is less than the second default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

Preferably, comprise further:

Processor 1100, specifically for:

Preferably, comprise further:

Processor 1100, for the subframe of mourning in silence of the second mapping relations micro cell deployment according to the cell hierarchy preset and subframe of mourning in silence, be the Microcell of m ' for cell hierarchy, the 9th of M+m radio frames of listening periods subframe is configured to multicast single frequency network MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, the M+1 of listening periods the 9th subframe to M+m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m ' represents cell hierarchy, and span is 1 ' to M '.

Preferably, judge, certainly as behind out-of-sync cells, to comprise further:

Processor 1100, arriving the synchronized update cycle of presetting for judging whether, if so, then re-executing synchronous process of establishing; Otherwise, maintain current state.

Wherein, in fig. 11, bus architecture can comprise interconnected bus and the bridge of any amount, and the various electrical chains of the memory that the one or more processor specifically represented by processor 1100 and memory 1120 represent are connected together.Other electrical chains various of such as ancillary equipment, pressurizer and management circuit etc. and so on can also be connected together by bus architecture, and these are all known in the field, therefore, are no longer described further it herein.Bus interface provides interface.Transceiver 1110 can be multiple element, namely comprises transmitter and transceiver, is provided for the unit communicated with other devices various over a transmission medium.Processor 1100 is in charge of bus architecture and common process, and memory 1120 can the data that use when executable operations of storage of processor 1100.

In sum, the invention provides a kind of air interface synchronization method of intercepting Network Based and device, Microcell obtains the PCI breath of all adjacent cells, according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of adjacent cell, the SINR filtering out CRS is not less than the adjacent cell that the first default synchronizing quality requires threshold value, further, choose the synchronisation source community of adjacent cell as self that the highest and level of wherein level is not less than M-1, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding synchronisation source community self.

Adopt method of the present invention, effectively improve synchronization accuracy, reduce Microcell to the interference of adjacent area, thus reduce the overall interference level of system.For not judging the situation that whether has macro station to cover in the scene of current deployment Microcell, the air interface synchronization method of intercepting Network Based that the present invention provides needing the application scenarios to whether there is macro base station to distinguish, is not applicable to any scene of LTE-Hi system picocell deployment.The cell hierarchy preset and the first mapping relations of subframe of mourning in silence are adopted to mourn in silence to Microcell the configuration of subframe, in this layoutprocedure, the unified situation considering various sub-frame configuration, layoutprocedure is simple, and do not need to distinguish specifically have employed which kind of sub-frame configuration, especially under the application scenarios opening TDD algorithm, the Advantages found of this collocation method more obvious.

In order to avoid synchronization accuracy difference between the Microcell that clock drift etc. brings, adopting method of the present invention can also carry out periodically synchronous maintenance to completing the synchronous Microcell set up, completing with the synchronous of corresponding synchronisation source community and calibrating.For junior community, community, periodically can carry out synchronisation source cell update, to find the synchronisation source community that community higher grade as early as possible, improve synchronization accuracy.

In addition, method of the present invention is adopted, can alarm in time re-establish synchronous when arriving the synchronized update cycle for the Microcell being in desynchronizing state, improve the operating efficiency of Microcell.

Those skilled in the art should understand, the embodiment of the application can be provided as method, system or computer program.Therefore, the application can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the application can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The application describes with reference to according to the flow chart of the method for the embodiment of the present application, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although described the preferred embodiment of the application, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the application's scope.

Obviously, those skilled in the art can carry out various change and modification to the embodiment of the present application and not depart from the spirit and scope of the embodiment of the present application.Like this, if these amendments of the embodiment of the present application and modification belong within the scope of the application's claim and equivalent technologies thereof, then the application is also intended to comprise these change and modification.

Claims

1. an air interface synchronization method of intercepting Network Based, is characterized in that, comprising:

The synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains in Microcell, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self, wherein, M is positive integer, represents maximum synchronous jumping figure.

2. the method for claim 1, is characterized in that, Microcell obtains the PCI information of each adjacent cell that can detect, specifically comprises:

3. the method for claim 1, it is characterized in that, the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains in Microcell, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self, wherein, M is positive integer, represent maximum synchronous jumping figure, specifically comprise:

The PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community is that the level of synchronisation source community adds 1.

4. the method as described in any one of claim 1-3, is characterized in that, comprises further:

Carried out pre-configured to Microcell before Microcell starts, be specially:

5. the method for claim 1, is characterized in that, the PCI of recording synchronism cell-of-origin, and after the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self, comprises further:

6. the method as described in any one of claim 1-5, is characterized in that, comprises further:

Microcell determine the cell hierarchy of self be 1 in M-1 arbitrary grade time, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of described Microcell is less than the first default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

When Microcell determines that the cell hierarchy of self is M, periodically judge whether to arrive the synchronized update cycle of presetting, if so, then when determining that the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, synchronous process of establishing is re-executed; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting described Microcell is less than the first default synchronizing quality and requires threshold value further, and the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load threshold value, if meet, then re-execute synchronous process of establishing; If do not meet, maintain the synchronous regime between current sync cell-of-origin.

7. the method as described in any one of claim 1-5, is characterized in that, comprises further:

If the cell hierarchy of adjacent cell that Microcell screening obtains be not 0 in M-1 arbitrary grade time, then judge that from as out-of-sync cells, the PCI of recording synchronism cell-of-origin be-1, and the cell hierarchy that the cell hierarchy of corresponding described synchronisation source community configures self is-1.

8. the method for claim 1, is characterized in that, comprises further:

If Microcell is according to first mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and search for the CRS of adjacent cell, and determine that the SINR value of CRS of the adjacent cell searched all is less than the first default synchronizing quality and requires threshold value, then judge whether described Microcell is isolated community further;

If so, then using described Microcell self as accurate time service synchronisation source, recording synchronism cell-of-origin PCI is the PCI of described Microcell self, and the cell hierarchy configuring described Microcell is-1;

Otherwise, obtain the Synchronization Status Message of the top n adjacent cell that periphery Reference Signal Received Power RSRP value sorts from big to small, determine to exist in described N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and the CRS of search at least one adjacent cell described, the SINR value filtering out CRS is not less than the adjacent cell that the second default synchronizing quality requires threshold value, and choose the highest adjacent cell of level or the isolated community synchronisation source community as self from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self, cell hierarchy 1 ', (M-1) cell hierarchy 1 ' is equal to, M-1.

9. method as claimed in claim 8, is characterized in that, judge whether described Microcell is isolated community, specifically comprises:

When judging that the circuit loss value between described Microcell and each adjacent cell detected is less than default line loss threshold, determine that described Microcell is for isolated community;

Or

When judging that the RSRP value between described Microcell and each adjacent cell detected is less than default RSRP thresholding, determine that described Microcell is for isolated community.

10. method as claimed in claim 8 or 9, is characterized in that, comprise further:

Microcell is determined when as isolated community, when Microcell judges to arrive the synchronized update cycle of presetting, judge whether that the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding further, if so, synchronous process of establishing is then re-executed; Otherwise, using the local clock of self as with reference to timing, maintain self synchronous regime.

11. methods as claimed in claim 8, it is characterized in that, when self is determined not for isolated community in Microcell, the highest adjacent cell of level or the isolated community synchronisation source community as self is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self, specifically comprise:

Screening acquisition level the highest and level in Microcell is not less than (M-1) ' and the maximum adjacent cell of SINR value as self synchronisation source community, or, from screening at least one the highest adjacent cell of the level that obtains random selecting adjacent cell as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community is that the level of synchronisation source community adds 1;

Or

Microcell determines that at least one isolated community that screening obtains, random selecting isolated community is as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is 1 '.

12. methods as claimed in claim 8, is characterized in that, comprise further:

Microcell determines that cell hierarchy that described N number of adjacent cell is non-isolated community or described N number of adjacent cell is not the arbitrary level in 1 ' to (M-1) ', then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

13. methods as claimed in claim 8, is characterized in that, comprise further:

Microcell determine to exist in described N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and the CRS of search at least one adjacent cell described, and determine that the SINR value of CRS of the adjacent cell searched all is less than the second default synchronizing quality and requires threshold value, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

14. methods as described in claim 8 or 11, is characterized in that, comprise further:

When Microcell determines that the cell hierarchy of self is in 1 ' to (M-1) ' arbitrary grade, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of described Microcell is less than the second default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

When Microcell determines that the cell hierarchy of self is M ', periodically judge whether to arrive the synchronized update cycle of presetting, if, then when determining that the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, re-execute synchronous process of establishing; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting described Microcell is less than the second default synchronizing quality and requires threshold value further, and the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, if meet, then re-execute synchronous process of establishing; If do not meet, maintain the synchronous regime between current sync cell-of-origin; Wherein, cell hierarchy M ' is equal to cell hierarchy M.

15. methods as claimed in claim 8, is characterized in that, comprise further:

Carried out pre-configured to Microcell before Microcell starts, be specially:

16. methods as claimed in claim 8, is characterized in that, the PCI of recording synchronism cell-of-origin, and after the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self, comprise further:

According to the mourn in silence subframe of the cell hierarchy preset with the second mapping relations micro cell deployment of subframe of mourning in silence, be the Microcell of m ' for cell hierarchy, the 9th of M+m radio frames of listening periods subframe is configured to multicast single frequency network MBSFN sub-frame, as subframe of mourning in silence, for intercepting the cell reference signals CRS of adjacent cell, and the Microcell of 1 ' is greater than for m ' value, the M+1 of listening periods the 9th subframe to M+m-1 radio frames is configured to MBSFN sub-frame, as collaborative subframe of mourning in silence, wherein m ' represents cell hierarchy, span is 1 ' to M '.

17. methods as described in claim 7 or 12 or 13, is characterized in that, Microcell judges from as behind out-of-sync cells, to comprise further:

18. 1 kinds of air interface synchronization devices of intercepting Network Based, is characterized in that, comprising:

And for choosing from screening in the adjacent cell that obtains the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self, wherein, M is positive integer, represents maximum synchronous jumping figure.

19. devices as claimed in claim 18, is characterized in that, when obtaining the PCI information of each adjacent cell that can detect, described acquiring unit specifically for:

20. devices as claimed in claim 18, it is characterized in that, the synchronisation source community of adjacent cell as self that the highest and level of level is not less than M-1 is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community, described processing unit specifically for:

21. devices as described in any one of claim 18-20, is characterized in that, comprise further:

Pre-configured unit, specifically for:

22. devices as claimed in claim 18, is characterized in that, comprise further:

23. devices as described in any one of claim 18-22, is characterized in that, comprise further:

Synchronous holding unit, for determine the cell hierarchy of self be 1 in M-1 arbitrary grade time, when Microcell judges to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of described Microcell is less than the first default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

And when the cell hierarchy determining self is M, periodically judge whether to arrive the synchronized update cycle of presetting, if so, then when determining that the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, synchronous process of establishing is re-executed; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting described Microcell is less than the first default synchronizing quality and requires threshold value further, and the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load threshold value, if meet, then re-execute synchronous process of establishing; If do not meet, maintain the synchronous regime between current sync cell-of-origin.

24. devices as described in any one of claim 18-22, is characterized in that, comprise further:

Described processing unit be used for screen the cell hierarchy of adjacent cell obtained be not 0 in M-1 arbitrary grade time, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

25. devices as claimed in claim 18, it is characterized in that, described processing unit is further used for:

26. devices as claimed in claim 25, is characterized in that, when determining whether isolated community, described processing unit specifically for:

Or

27. devices as described in claim 25 or 26, is characterized in that, comprise further:

Synchronous holding unit, for determining when as isolated community, when Microcell judges to arrive the synchronized update cycle of presetting, judge whether that the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding further, if so, synchronous process of establishing is then re-executed; Otherwise, using the local clock of self as with reference to timing, maintain self synchronous regime.

28. devices as claimed in claim 25, it is characterized in that, when determining self not for isolated community, the highest adjacent cell of level or the isolated community synchronisation source community as self is chosen from screening the adjacent cell that obtains, the PCI of recording synchronism cell-of-origin, and during self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community, described processing unit specifically for:

The highest and the level of screening acquisition level is not less than (M-1) ' and the maximum adjacent cell of SINR value as self synchronisation source community, or, from screening at least one the highest adjacent cell of the level that obtains random selecting adjacent cell as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and self the cell hierarchy of cell hierarchy configuration of corresponding described synchronisation source community is that the level of synchronisation source community adds 1;

Or

Determine that at least one isolated community that screening obtains, random selecting isolated community is as the synchronisation source community of self, the PCI of recording synchronism cell-of-origin, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is 1 '.

29. devices as claimed in claim 25, it is characterized in that, described processing unit is used for being further used for:

Determine that cell hierarchy that described N number of adjacent cell is non-isolated community or described N number of adjacent cell is not the arbitrary level in 1 ' to (M-1) ', then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

30. devices as claimed in claim 25, it is characterized in that, described processing unit is further used for:

Determine to exist in described N number of adjacent cell at least one adjacent cell for isolated community or cell hierarchy be in 1 ' to (M-1) ' arbitrary grade time, according to second mapping relations of the cell hierarchy preset with subframe of mourning in silence, the subframe of mourning in silence configured for all cell hierarchy keeps mourning in silence, and the CRS of search at least one adjacent cell described, and determine that the SINR value of CRS of the adjacent cell searched all is less than the second default synchronizing quality and requires threshold value, then judge certainly as out-of-sync cells, the PCI of recording synchronism cell-of-origin is-1, and the cell hierarchy of the cell hierarchy configuration of corresponding described synchronisation source community self is-1.

31. devices as described in claim 25 or 28, is characterized in that, comprise further:

Synchronous holding unit, for when determining that the cell hierarchy of self is in 1 ' to (M-1) ' arbitrary grade, whenever judging to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community of described Microcell is less than the second default synchronizing quality and requires threshold value further, if so, synchronous process of establishing is then re-executed; Otherwise, maintain the synchronous regime between current sync cell-of-origin;

And when the cell hierarchy for determining self is M ', periodically judge whether to arrive the synchronized update cycle of presetting, if, then when determining that the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, re-execute synchronous process of establishing; Otherwise, when determining to arrive the synchronous hold period preset, judge whether that the SINR value of the CRS of the synchronisation source community meeting described Microcell is less than the second default synchronizing quality and requires threshold value further, and the uplink load of described Microcell is less than default uplink load thresholding and downlink load is less than default downlink load thresholding, if meet, then re-execute synchronous process of establishing; If do not meet, maintain the synchronous regime between current sync cell-of-origin; Wherein, cell hierarchy M ' is equal to cell hierarchy M.

32. devices as claimed in claim 25, is characterized in that, comprise further:

Pre-configured unit, specifically for:

Dynamic Time Division duplex TDD algorithm is opened if do not configure, then for any one in Microcell configuration TDD ascending-descending subframes configuration 1-6, and configure the first mapping relations of cell hierarchy and the subframe of mourning in silence preset and the second mapping relations of cell hierarchy and subframe of mourning in silence;

33. devices as claimed in claim 25, is characterized in that, comprise further:

34. devices as described in claim 18 or 25, is characterized in that, judge from as behind out-of-sync cells, to comprise further: