CN102761956A - Network interception synchronization method and device as well as base station - Google Patents
Network interception synchronization method and device as well as base station Download PDFInfo
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- CN102761956A CN102761956A CN2012102204555A CN201210220455A CN102761956A CN 102761956 A CN102761956 A CN 102761956A CN 2012102204555 A CN2012102204555 A CN 2012102204555A CN 201210220455 A CN201210220455 A CN 201210220455A CN 102761956 A CN102761956 A CN 102761956A
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Abstract
The embodiment of the invention provides a network interception synchronization method and a network interception synchronization device as well as a base station. The network interception synchronization method comprises the following steps of: receiving superior reference signals sent by a superior base station from an air interface at a current download sub frame at the corresponding level configured to be as receiving attibution; carrying out interception synchronization with the superior base station according to the superior reference signal; and sending reference signals at the corresponding level to a subordinate base station at the next downlink sub frame at the corresponding level, which is configured to be a sending attribution, so that the subordinate base station carries out the interception synchronization with the base station at the corresponding level according to the reference signals at the corresponding level, wherein an attribution of the subordinate downlink sub frame corresponding to the current downlink sub frame at the corresponding level in the subordinate base station is a receiving attribution; the subordinate downlink sub frame is a silence sub frame; and an attribution of the subordinate downlink sub frame corresponding to the next downlink sub frame corresponding to the corresponding level in the subordinate base station is the receiving attribution. The embodiment of the invention further provides the network interception synchronization device and the base station. According to the network listening synchronization method and device as well as the base station provided by the embodiment of the invention, the subordinate base station is prevented from synchronous interference with the base station at the corresponding level in an interception synchronization process according to the reference signals of the corresponding level.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of network intercepting method for synchronous, device and base station.
Background technology
Simultaneous techniques and GSM are closely related, and wherein the switching between stable, the aligning of uplink and downlink timeslot of carrier frequency, reliable high-quality transmission, the base station, roaming etc. all need accurate method for synchronous.Usually, synchronizing process is divided into initial synchronisation and follows the tracks of synchronously.Global positioning system (Global Positioning System; Hereinafter to be referred as: GPS), IEEE1588v2, network intercepting be the synchronization among base stations method of current main-stream.GSM uses GPS to carry out can obtaining the higher synchronous precision synchronously, but GPS installs complicacy, failure rate is higher.The IEEE1588v2 simultaneous techniques is on certain node in transmission network clock server to be set, and clock server as synchronisation source, is injected synchronous timing information to transmission network, and send synchronous timing information to base station, as the base station synchronization benchmark; But it is identical with the message time delay of sending transmission that this simultaneous techniques need receive.
Network intercepting method for synchronous of the prior art is the synchronous tracking that realizes through eating dishes without rice or wine between the base station; The reference signal that utilization is eated dishes without rice or wine as synchronizing signal realize between the base station synchronously, reference signal can be cell reference signals (Cell-specific Reference Signals; Hereinafter to be referred as: CRS).In the MBSFN system, from subscriber equipment (User Equipment; Hereinafter to be referred as: UE) side, the evolved base station of a plurality of sub-districts (evolved Node B; Hereinafter to be referred as: the signal that eNB) sends is all regarded as useful signal, and the characteristics of this transmission make frequency selectivity increase greatly.
Yet; Signal interference meeting between the base station makes a big impact to the synchronization accuracy of network intercepting method for synchronous; Fig. 1 is the interference problem sketch map of network intercepting in the prior art, and is as shown in Figure 1, when NB1 receives the synchronizing signal of Sync eNB; The synchronizing signal that NB2 sends can cause interference effect to it, makes synchronization accuracy reduce.
Summary of the invention
The embodiment of the invention provides a kind of network intercepting method for synchronous, device and base station, and the interference problem that exists when the solution network intercepting is synchronous improves synchronization accuracy.
First aspect of the embodiment of the invention provides a kind of network intercepting method for synchronous, comprising:
Be configured to receive on the descending sub frame current at the corresponding levels of attribute, receiving higher level's reference signal that upper-level BTS sends from air interface;
Intercept synchronously according to said higher level's reference signal and said upper-level BTS;
Send on the descending sub frame next at the corresponding levels of attribute being configured to, send reference signal at the corresponding levels to subordinate base station, so that said subordinate base station is intercepted synchronously according to said reference signal at the corresponding levels and base station at the corresponding levels;
Wherein, The attribute of the subordinate descending sub frame corresponding with said current descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station; And said subordinate descending sub frame is the subframe of mourning in silence, and the attribute of the subordinate descending sub frame corresponding with said next one descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station.
It is synchronous that another aspect of the embodiment of the invention provides a kind of network intercepting:
Receiver module is used at the descending sub frame current at the corresponding levels that is configured to receive attribute, receives higher level's reference signal that upper-level BTS sends from air interface;
First intercepts synchronization module, is used for intercepting synchronously according to said higher level's reference signal and said upper-level BTS;
Second intercepts synchronization module, is used for sending reference signal at the corresponding levels at the descending sub frame next at the corresponding levels that is configured to send attribute to subordinate base station, so that said subordinate base station is intercepted synchronously according to said reference signal at the corresponding levels and base station at the corresponding levels;
Wherein, The attribute of the subordinate descending sub frame corresponding with said current descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station; And said subordinate descending sub frame is the subframe of mourning in silence, and the attribute of the subordinate descending sub frame corresponding with said next one descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station.
Another aspect of the embodiment of the invention provides a kind of base station, comprises above-mentioned network intercepting synchronizer.
The technique effect of the embodiment of the invention is: the descending sub frame current at the corresponding levels through with base station at the corresponding levels is configured to receive attribute; Subordinate's descending sub frame of correspondence is configured to receive attribute; Make base station at the corresponding levels on current descending sub frame at the corresponding levels, receive only higher level's reference signal that upper-level BTS issues, thereby avoided base station at the corresponding levels to intercept the synchronous interference when synchronous according to higher level's reference signal and upper-level BTS; Descending sub frame next at the corresponding levels through with base station at the corresponding levels is configured to send attribute; Subordinate's descending sub frame of correspondence is configured to receive attribute; Make the subordinate base station on this subordinate's descending sub frame, to receive only the reference signal at the corresponding levels that base station at the corresponding levels issues, thereby avoided subordinate base station to intercept the synchronous interference when synchronous according to reference signal at the corresponding levels and base station at the corresponding levels.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the interference problem sketch map of network intercepting in the prior art;
Fig. 2 is the flow chart of network intercepting method for synchronous embodiment one of the present invention;
Fig. 3 is the flow chart of network intercepting method for synchronous embodiment two of the present invention;
Fig. 4 is the attribute configuration sketch map of descending sub frame among the network intercepting method for synchronous embodiment two of the present invention;
Fig. 5 is the structural representation of network intercepting synchronizer embodiment one of the present invention;
Fig. 6 is the structural representation of network intercepting synchronizer embodiment two of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Fig. 2 is the flow chart of network intercepting method for synchronous embodiment one of the present invention, and as shown in Figure 2, present embodiment provides a kind of network intercepting method for synchronous, can specifically comprise the steps:
Usually be provided with a plurality of base stations in the GSM; Present embodiment is divided level to a plurality of base stations; Specifically can be divided into three levels or four levels, perhaps multilayer level more is like the 0th level base station, the 1st level base station, the 2nd level base station, the 3rd level base station or the like.Wherein, the 0th level base station is the upper-level BTS of the 1st level, and the 1st level base station is the upper-level BTS of the 2nd level base station, and the 2nd level base station is the upper-level BTS of the 3rd level base station, by that analogy; Correspondingly, the 1st level base station is the subordinate base station of the 0th level, and the 2nd level base station is the subordinate base station of the 1st level base station, and the 3rd level base station is the subordinate base station of the 2nd level base station, by that analogy.This step is that base station at the corresponding levels is on current descending sub frame at the corresponding levels; Receive higher level's reference signal that upper-level BTS sends from air interface; The attribute of the current descending sub frame at the corresponding levels here is configured to receive attribute, present embodiment lead to realize on the descending sub frame between the base station synchronously.Higher level's reference signal here can be specially multimedia broadcasting SFN (Multimedia Broadcast Single Frequency Network; Hereinafter to be referred as: MBSFN) reference signal.In the present embodiment; Can define two kinds of attributes in advance for descending sub frame; Promptly receive attribute and send attribute, the descending sub frame that is configured to receive attribute only can receive from other signal of base station, and can outwards not send signal; The descending sub frame that is configured to send attribute only can outwards send signal, and can not receive from other signal of base station.
In the present embodiment, the attribute of the subordinate descending sub frame corresponding with current descending sub frame at the corresponding levels is the reception attribute in the subordinate base station, and this subordinate's descending sub frame is the subframe of mourning in silence.The descending sub frame current at the corresponding levels here is the descending sub frame in the base station at the corresponding levels, and descending sub frame at the corresponding levels is defined as " current " descending sub frame at the corresponding levels just in order to distinguish mutually with next one descending sub frame at the corresponding levels, does not have special implication.Subordinate's descending sub frame corresponding with current descending sub frame at the corresponding levels in the descending base station is configured to receive attribute, and then this subordinate's descending sub frame only can receive from other signal of base station, and can outwards not send signal.In addition, this subordinate's descending sub frame is configured to the subframe of mourning in silence simultaneously, and then this descending sub frame only can receive from the upper level signal of base station.
Step 202 is intercepted according to said higher level's reference signal and said upper-level BTS synchronously.
Base station at the corresponding levels is after the higher level's reference signal that receives the upper-level BTS transmission on the current descending sub frame at the corresponding levels, and base station at the corresponding levels can be intercepted according to this higher level's reference signal and upper-level BTS synchronously.Base station at the corresponding levels specifically can obtain clock synchronization information from higher level's reference signal, realize intercepting synchronously of base station at the corresponding levels and upper-level BTS according to clock synchronization information.When base station at the corresponding levels receives higher level's reference signal of upper-level BTS transmission on current descending sub frame at the corresponding levels; Because subordinate base station can be to this corresponding levels base station transmit signals on subordinate's descending sub frame of correspondence; Thereby base station at the corresponding levels can not receive the interference of other signals when receiving higher level's reference signal, has avoided base station at the corresponding levels and upper-level BTS to intercept the synchronous interference when synchronous.
Step 203 is sent on the descending sub frame next at the corresponding levels of attribute being configured to, and sends reference signal at the corresponding levels to subordinate base station, so that said subordinate base station is intercepted according to said reference signal at the corresponding levels and base station at the corresponding levels synchronously.
When base station at the corresponding levels and upper-level BTS synchronously after; Reference signal at the corresponding levels can be sent to subordinate base station in base station at the corresponding levels on next one descending sub frame at the corresponding levels; This next one descending sub frame at the corresponding levels is configured to send attribute; This descending sub frame only can be to other base station transmit signals, and can not receive other signal of base station.The reference signal at the corresponding levels here also can be specially the MBSFN reference signal.In the present embodiment, the attribute of the subordinate descending sub frame corresponding with next one descending sub frame at the corresponding levels is for receiving attribute in the subordinate base station, and promptly subordinate base station receives only the signal of upper-level BTS on this subordinate's descending sub frame, and can be to other base station transmit signals.Subordinate base station just can realize and the intercepting synchronously of base station at the corresponding levels according to this corresponding levels reference signal, and avoid intercepting the synchronous interference in the synchronizing process after receiving the reference signal at the corresponding levels of base station at the corresponding levels sending.
It is pointed out that base station at the corresponding levels, upper-level BTS, subordinate base station in the present embodiment are relative concept, is not to refer to some base stations utterly.When having four level base stations in the network, as if being base station at the corresponding levels with the 1st level base station, then the 0th level base station is a upper-level BTS with respect to the 1st level base station, and the 2nd level base station is a subordinate base station with respect to the 1st level base station; If with the 2nd level base station is base station at the corresponding levels, then the 1st level base station is a upper-level BTS with respect to the 2nd level base station, and the 3rd level base station is a subordinate base station with respect to the 2nd level base station.Current descending sub frame at the corresponding levels, next descending sub frame at the corresponding levels, subordinate's descending sub frame etc. also are relative concept, are not to refer to some subframes utterly.Suppose that subframe arranges in order, i.e. 0# subframe, 1# subframe, 2# subframe, 3# subframe ..., all there are each self-corresponding 0# subframe, 1# subframe, 2# subframe, 3# subframe in each level base station ...; If on the 0# subframe, intercept synchronously; 0# subframe in the base station then at the corresponding levels is current descending sub frame at the corresponding levels; 1# subframe in the base station at the corresponding levels is next descending sub frame at the corresponding levels; 0# subframe in the subordinate base station is the subordinate descending sub frame corresponding with current descending sub frame at the corresponding levels, and the 1# subframe in the subordinate base station is the subordinate descending sub frame corresponding with next one descending sub frame at the corresponding levels.
Present embodiment provides a kind of network intercepting method for synchronous; Descending sub frame current at the corresponding levels through with base station at the corresponding levels is configured to receive attribute; Subordinate's descending sub frame of correspondence is configured to receive attribute; Make base station at the corresponding levels on current descending sub frame at the corresponding levels, receive only higher level's reference signal that upper-level BTS issues, thereby avoided base station at the corresponding levels to intercept the synchronous interference when synchronous according to higher level's reference signal and upper-level BTS; Descending sub frame next at the corresponding levels through with base station at the corresponding levels is configured to send attribute; Subordinate's descending sub frame of correspondence is configured to receive attribute; Make the subordinate base station on this subordinate's descending sub frame, to receive only the reference signal at the corresponding levels that base station at the corresponding levels issues, thereby avoided subordinate base station to intercept the synchronous interference when synchronous according to reference signal at the corresponding levels and base station at the corresponding levels.
Fig. 3 is the flow chart of network intercepting method for synchronous embodiment two of the present invention, and as shown in Figure 3, present embodiment provides a kind of network intercepting method for synchronous, can specifically comprise the steps:
The network intercepting synchronizing process specifically can comprise initial synchronization and follow the tracks of synchronizing process, promptly accomplishes after the initial synchronization earlier, follows the tracks of synchronizing process again.This step is that base station at the corresponding levels receives the primary and secondary synchronization signals that send each base station from air interface, from primary and secondary synchronization signals, detects the maximum primary and secondary synchronization signals of signal strength signal intensity.Wherein, primary and secondary synchronization signals can comprise master sync signal (Primary Synchronization Signal; Hereinafter to be referred as: PSS) and auxiliary synchronous signals (Secondary Synchronization Signal; Hereinafter to be referred as: SSS), master sync signal can specifically be mapped to physical resource and frame structure type.The base station at the corresponding levels here can be the arbitrary base station in the network, when base station at the corresponding levels receives the primary and secondary synchronization signals from other base stations from air interface after, can from the signal that receives, detect the maximum primary and secondary synchronization signals of signal strength signal intensity.
Behind the primary and secondary synchronization signals that receives other base stations; Base station at the corresponding levels can detect the maximum primary and secondary synchronization signals of signal strength signal intensity from the signal that receives; And will send the upper-level BTS of the base station of the maximum primary and secondary synchronization signals of this intensity of signal, thereby realize the initial synchronisation of base station at the corresponding levels and upper-level BTS as base station at the corresponding levels.Then, Master Information Block (Master Information Block can be passed through in base station at the corresponding levels; Hereinafter to be referred as: MIB) message or system information block (System Information Block; Hereinafter to be referred as: SIB) message is obtained the hierarchical information of upper-level BTS, and this hierarchical information can be specially a layer level number, supposes that the layer level number of upper-level BTS is n, and then the layer level number of base station at the corresponding levels is n+1.
In the present embodiment, for fear of the synchronous interference of intercepting in the synchronizing process,, promptly receive attribute and send attribute for descending sub frame defines two kinds of attributes in advance.Base station in the present embodiment is specifically with Long Term Evolution (Long Term Evolution; Hereinafter to be referred as: LTE) eNB in the system is an example, certainly, it will be understood by those skilled in the art that the network intercepting method for synchronous that present embodiment provides can also be applied to 3G (Third Generation) Moblie technology (3rd Generation; Hereinafter to be referred as: 3G) base station, worldwide interoperability for microwave insert (Worldwide Interoperability for Microwave Access; Hereinafter to be referred as: WiMAX) base station, Home eNodeB etc.Descending sub frame at the corresponding levels in the present embodiment, higher level's descending sub frame, subordinate's descending sub frame can be referred to as descending sub frame, and the descending sub frame in the present embodiment can be specially the MBSFN subframe.In the present embodiment, specifically the attribute configuration with the descending sub frame at the corresponding levels in the base station at the corresponding levels is to receive attribute, makes this corresponding levels descending sub frame be used to receive higher level's reference signal of upper-level BTS; The attribute configuration of higher level's descending sub frame corresponding with this corresponding levels descending sub frame in the upper-level BTS is the transmission attribute, makes that this higher level's descending sub frame is used for sending higher level's reference signal to base station at the corresponding levels; For receiving attribute, and, make this subordinate's descending sub frame can only receive the reference signal at the corresponding levels that send base station at the corresponding levels the attribute configuration of subordinate's descending sub frame corresponding in the subordinate base station with this corresponding levels descending sub frame with this subordinate's descending sub frame subframe that is configured to mourn in silence.
Fig. 4 is for the attribute configuration sketch map of descending sub frame among the network intercepting method for synchronous embodiment two of the present invention, and is as shown in Figure 4, supposes to exist in the network the 0th level base station, the 1st level base station, three level base stations, the 2nd level base station; Be eNB0, eNB1, eNB2; Suppose that with the N sub-frame be a tracking cycle, present embodiment is that example describes with a tracking cycle only, particularly; In a tracking cycle; The wireless sub-frame of each base station is 0# subframe, 1# subframe, 2# subframe ... (N-1) # subframe, wherein, 0# subframe, 3# subframe are two adjacent descending sub frames.Wherein, base station at the corresponding levels can be specially eNB1, and upper-level BTS can be specially eNB0, and subordinate base station can be specially eNB2.Wherein, the 0# subframe among the eNB0 is corresponding with the 0# subframe among the eNB1, and the 0# subframe among the eNB2 is corresponding with the 0# subframe among the eNB1.When eNB1 is need be with eNB0 synchronous; The attribute configuration of a descending sub frame at the corresponding levels among the eNB1 is the reception attribute; Attribute configuration as with the 0# subframe among the eNB1 is reception attribute (RX); With the attribute configuration of the 0# subframe among the eNB0 for sending attribute (TX), with the attribute configuration of the 0# subframe among the eNB2 for receiving attribute (RX).0# subframe among the eNB1 is the descending sub frame current at the corresponding levels of base station at the corresponding levels at this moment, and the descending sub frame current at the corresponding levels of certain base station at the corresponding levels can be other descending sub frames, is that example describes with the 0# subframe only here.
In the present embodiment, except the attribute to current descending sub frame was configured, also the attribute to next descending sub frame was configured, and the next descending sub frame here is the next descending sub frame adjacent with current descending sub frame.This step be with the attribute configuration of the next descending sub frame at the corresponding levels of descending sub frame at the corresponding levels in the base station at the corresponding levels for sending attribute, make and should be used for sending reference signal at the corresponding levels by next one descending sub frame at the corresponding levels to subordinate base station; With the attribute configuration of subordinate's descending sub frame corresponding with next one descending sub frame at the corresponding levels in the subordinate base station is to receive attribute, makes this subordinate's descending sub frame be used to receive the reference signal at the corresponding levels of base station at the corresponding levels.Being example with above-mentioned Fig. 4 still, is that 0# subframe among the eNB1 is an example with the descending sub frame current at the corresponding levels of base station at the corresponding levels, and the descending sub frame next at the corresponding levels of base station at the corresponding levels then is the 3# subframe among the eNB1.This step with the attribute configuration of the 3# subframe among the eNB1 for sending attribute (TX), with the attribute configuration of the 3# subframe among the eNB2 for receiving attribute (RX).
Further; The network intercepting method for synchronous that present embodiment provides can also comprise the steps: after the configuration of the ascending-descending subframes at the corresponding levels of base station at the corresponding levels changes; Base station at the corresponding levels sends to subordinate base station with the current proportioning situation of ascending-descending subframes at the corresponding levels, so that subordinate base station is upgraded the configuring condition that is used to follow the tracks of synchronous subordinate's ascending-descending subframes according to the current proportioning situation of said ascending-descending subframes at the corresponding levels.Wherein, The proportioning situation of ascending-descending subframes is the sub-frame of uplink quantity that disposes in the base station and the ratio of descending sub frame quantity; Because the attribute to descending sub frame in the present embodiment carries out concrete configuration; For the corresponding relation of the descending sub frame between the base station that guarantees adjacent two levels is constant, like the corresponding relation between the k# descending sub frame of the k# descending sub frame of eNB0 and eNB1, after the configuration of ascending-descending subframes at the corresponding levels changes; Current proportioning advisory subordinate base station after in time will changing is so that subordinate base station is upgraded the configuring condition that is used to follow the tracks of synchronous subordinate's ascending-descending subframes according to the ratio of uplink subframe to downlink subframe situation of upper-level BTS.
After the initial synchronisation of accomplishing base station at the corresponding levels and upper-level BTS; Upper-level BTS is followed the tracks of in base station at the corresponding levels on pre-configured subframe; Be that base station at the corresponding levels is being configured to receive on the descending sub frame current at the corresponding levels of attribute, receive higher level's reference signal that upper-level BTS sends from air interface.Be example still with above-mentioned Fig. 4; Suppose that base station at the corresponding levels is eNB1; When eNB1 and eNB0 follow the tracks of when synchronous, eNB1 can receive higher level's reference signal that eNB0 sends on first wireless sub-frame 0# subframe in this tracking cycle, and first wireless sub-frame 0# subframe among the eNB0 is the MBSFN subframe that is configured to send attribute; First wireless sub-frame 0# subframe among the eNB1 is the MBSFN subframe that is configured to receive attribute, and this higher level's reference signal is specially higher level MBSFN reference signal.
Step 306, intercept according to higher level's reference signal and said upper-level BTS synchronously base station at the corresponding levels.
After base station at the corresponding levels received higher level's reference signal from upper-level BTS, base station at the corresponding levels just can be intercepted according to this higher level's reference signal and upper-level BTS synchronously.Be example still with above-mentioned Fig. 4; ENB1 is after the higher level MBSFN reference signal that receives the eNB0 transmission on first wireless sub-frame 0# subframe; ENB1 gets access to clock synchronization information from this higher level MBSFN reference signal, follow the tracks of synchronously according to this clock synchronization information and eNB0.
After the tracking synchronously with upper-level BTS was accomplished in base station at the corresponding levels, base station at the corresponding levels continued to follow the tracks of synchronously with subordinate base station, and specifically send on the descending sub frame next at the corresponding levels of attribute being configured to base station at the corresponding levels, sends reference signal at the corresponding levels to subordinate base station.Be example still with above-mentioned Fig. 4; Descending sub frame next at the corresponding levels among the eNB1 is specially second wireless sub-frame 3# subframe among the eNB1; After eNB1 and eNB0 realization tracking synchronously; ENB1 sends reference signal at the corresponding levels to eNB2 on second wireless sub-frame 3# subframe, second wireless sub-frame 3# subframe among the eNB1 is the MBSFN subframe that is configured to send attribute; Second wireless sub-frame 3# subframe among the eNB2 is the MBSFN subframe that is configured to receive attribute, and this higher level's reference signal is specially MBSFN reference signal at the corresponding levels.
After the subordinate base station received reference signal at the corresponding levels from base station at the corresponding levels, subordinate base station just can be intercepted according to this corresponding levels reference signal and base station at the corresponding levels synchronously.Be example still with above-mentioned Fig. 4; ENB2 is after the MBSFN reference signal at the corresponding levels that receives the eNB1 transmission on second wireless sub-frame 3# subframe; ENB2 gets access to clock synchronization information from these corresponding levels MBSFN reference signal, follow the tracks of synchronously according to this clock synchronization information and eNB1.
Present embodiment provides a kind of network intercepting method for synchronous; Descending sub frame current at the corresponding levels through with base station at the corresponding levels is configured to receive attribute; Subordinate's descending sub frame of correspondence is configured to receive attribute; Make base station at the corresponding levels on current descending sub frame at the corresponding levels, receive only higher level's reference signal that upper-level BTS issues, thereby avoided base station at the corresponding levels to intercept the synchronous interference when synchronous according to higher level's reference signal and upper-level BTS; Descending sub frame next at the corresponding levels through with base station at the corresponding levels is configured to send attribute; Subordinate's descending sub frame of correspondence is configured to receive attribute; Make the subordinate base station on this subordinate's descending sub frame, to receive only the reference signal at the corresponding levels that base station at the corresponding levels issues, thereby avoided subordinate base station to intercept the synchronous interference when synchronous according to reference signal at the corresponding levels and base station at the corresponding levels; And less to the influence at terminal, synchronization accuracy is higher.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each method embodiment can be accomplished through the relevant hardware of program command.Aforesaid program can be stored in the computer read/write memory medium.This program the step that comprises above-mentioned each method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fig. 5 is the structural representation of network intercepting synchronizer embodiment one of the present invention, and as shown in Figure 5, present embodiment provides a kind of network intercepting synchronizer, can specifically carry out each step among the said method embodiment one, repeats no more here.The network intercepting synchronizer that present embodiment provides can comprise specifically that receiver module 501, first intercepts synchronization module 502 and second and intercept synchronization module 503.Wherein, receiver module 501 is used at the descending sub frame current at the corresponding levels that is configured to receive attribute, receives higher level's reference signal that upper-level BTS sends from air interface.First intercepts synchronization module 502 is used for intercepting synchronously according to said higher level's reference signal and said upper-level BTS.Second intercepts synchronization module 503 is used for sending reference signal at the corresponding levels at the descending sub frame next at the corresponding levels that is configured to send attribute to subordinate base station, so that said subordinate base station is intercepted according to said reference signal at the corresponding levels and base station at the corresponding levels synchronously.Wherein, The attribute of the subordinate descending sub frame corresponding with said current descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station; And said subordinate descending sub frame is the subframe of mourning in silence, and the attribute of the subordinate descending sub frame corresponding with said next one descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station.
Fig. 6 is the structural representation of network intercepting synchronizer embodiment two of the present invention, and as shown in Figure 6, present embodiment provides a kind of network intercepting synchronizer, can specifically carry out each step among the said method embodiment two, repeats no more here.The network intercepting synchronizer that present embodiment provides can also comprise sending module 601 on above-mentioned basis shown in Figure 5.Sending module 601 is used for after the proportioning situation of the ascending-descending subframes at the corresponding levels of base station at the corresponding levels changes; The current proportioning situation of ascending-descending subframes at the corresponding levels is sent to subordinate base station, so that said subordinate base station is according to the current proportioning situation configuration subordinate ascending-descending subframes of said ascending-descending subframes at the corresponding levels.
Further, the network intercepting synchronizer that provides of present embodiment can also comprise detection module 602 and initial synchronization module 603.Wherein, Detection module 602 was used for before higher level's reference signal that said reception upper-level BTS sends from air interface; Receive the primary and secondary synchronization signals that send each base station from said air interface, from said primary and secondary synchronization signals, detect the maximum primary and secondary synchronization signals of signal strength signal intensity.Initial synchronization module 603 is used for the upper-level BTS of the base station of sending the maximum primary and secondary synchronization signals of said signal strength signal intensity as base station at the corresponding levels, with the initial synchronisation of realization with said upper-level BTS.
Further, the network intercepting synchronizer that provides of present embodiment can also comprise first configuration module 604 and second configuration module 605.First configuration module 604 is used for the attribute configuration of the descending sub frame at the corresponding levels of said base station at the corresponding levels is the reception attribute; The attribute configuration of higher level's descending sub frame corresponding with said descending sub frame at the corresponding levels in the said upper-level BTS is the transmission attribute; The attribute configuration of subordinate's descending sub frame corresponding with said descending sub frame at the corresponding levels in the said subordinate base station is the reception attribute, and said subordinate descending sub frame is configured to the subframe of mourning in silence.Second configuration module 605 is used for the attribute configuration of the next descending sub frame at the corresponding levels of descending sub frame at the corresponding levels described in the said base station at the corresponding levels for sending attribute, and the attribute configuration of subordinate's descending sub frame corresponding with said next one descending sub frame at the corresponding levels in the said subordinate base station is the reception attribute.
Particularly; Descending sub frame at the corresponding levels in the network intercepting synchronizer that present embodiment provides is a descending multimedia broadcasting SFN MBSFN subframe at the corresponding levels; Said higher level's reference signal is a higher level MBSFN reference signal, and said subordinate reference signal is the MBSFN of a subordinate reference signal.
Present embodiment provides a kind of network intercepting synchronizer; Descending sub frame current at the corresponding levels through with base station at the corresponding levels is configured to receive attribute; Subordinate's descending sub frame of correspondence is configured to receive attribute; Make base station at the corresponding levels on current descending sub frame at the corresponding levels, receive only higher level's reference signal that upper-level BTS issues, thereby avoided base station at the corresponding levels to intercept the synchronous interference when synchronous according to higher level's reference signal and upper-level BTS; Descending sub frame next at the corresponding levels through with base station at the corresponding levels is configured to send attribute; Subordinate's descending sub frame of correspondence is configured to receive attribute; Make the subordinate base station on this subordinate's descending sub frame, to receive only the reference signal at the corresponding levels that base station at the corresponding levels issues, thereby avoided subordinate base station to intercept the synchronous interference when synchronous according to reference signal at the corresponding levels and base station at the corresponding levels; And less to the influence at terminal, synchronization accuracy is higher.
Present embodiment also provides a kind of base station, can specifically comprise above-mentioned Fig. 5 or network intercepting synchronizer shown in Figure 6.
What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (11)
1. a network intercepting method for synchronous is characterized in that, comprising:
Be configured to receive on the descending sub frame current at the corresponding levels of attribute, receiving higher level's reference signal that upper-level BTS sends from air interface;
Intercept synchronously according to said higher level's reference signal and said upper-level BTS;
Send on the descending sub frame next at the corresponding levels of attribute being configured to, send reference signal at the corresponding levels to subordinate base station, so that said subordinate base station is intercepted synchronously according to said reference signal at the corresponding levels and base station at the corresponding levels;
Wherein, The attribute of the subordinate descending sub frame corresponding with said current descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station; And said subordinate descending sub frame is the subframe of mourning in silence, and the attribute of the subordinate descending sub frame corresponding with said next one descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station.
2. method according to claim 1 is characterized in that, also comprises:
After the proportioning situation of the ascending-descending subframes at the corresponding levels of base station at the corresponding levels changes; The current proportioning situation of ascending-descending subframes at the corresponding levels is sent to subordinate base station, so that said subordinate base station is according to the current proportioning situation configuration subordinate ascending-descending subframes of said ascending-descending subframes at the corresponding levels.
3. method according to claim 1 is characterized in that, before higher level's reference signal that said reception upper-level BTS sends from air interface, also comprises:
Receive the primary and secondary synchronization signals that send each base station from said air interface, from said primary and secondary synchronization signals, detect the maximum primary and secondary synchronization signals of signal strength signal intensity;
With the upper-level BTS of the base station of sending the maximum primary and secondary synchronization signals of said signal strength signal intensity, with the initial synchronisation of realization with said upper-level BTS as base station at the corresponding levels.
4. method according to claim 1 is characterized in that, also comprises:
The attribute configuration of the descending sub frame at the corresponding levels in the said base station at the corresponding levels is the reception attribute; The attribute configuration of higher level's descending sub frame corresponding with said descending sub frame at the corresponding levels in the said upper-level BTS is the transmission attribute; With the attribute configuration of subordinate's descending sub frame corresponding in the said subordinate base station with said descending sub frame at the corresponding levels for receiving attribute, and with the said subordinate descending sub frame subframe that is configured to mourn in silence;
The attribute configuration of the next descending sub frame at the corresponding levels of descending sub frame at the corresponding levels described in the said base station at the corresponding levels for sending attribute, is the reception attribute with the attribute configuration of subordinate's descending sub frame corresponding with said next one descending sub frame at the corresponding levels in the said subordinate base station.
5. according to each described method among the claim 1-4; It is characterized in that; Said descending sub frame at the corresponding levels is a descending multimedia broadcasting SFN MBSFN subframe at the corresponding levels, and said higher level's reference signal is a higher level MBSFN reference signal, and said subordinate reference signal is the MBSFN of a subordinate reference signal.
6. a network intercepting synchronizer is characterized in that, comprising:
Receiver module is used at the descending sub frame current at the corresponding levels that is configured to receive attribute, receives higher level's reference signal that upper-level BTS sends from air interface;
First intercepts synchronization module, is used for intercepting synchronously according to said higher level's reference signal and said upper-level BTS;
Second intercepts synchronization module, is used for sending reference signal at the corresponding levels at the descending sub frame next at the corresponding levels that is configured to send attribute to subordinate base station, so that said subordinate base station is intercepted synchronously according to said reference signal at the corresponding levels and base station at the corresponding levels;
Wherein, The attribute of the subordinate descending sub frame corresponding with said current descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station; And said subordinate descending sub frame is the subframe of mourning in silence, and the attribute of the subordinate descending sub frame corresponding with said next one descending sub frame at the corresponding levels is for receiving attribute in the said subordinate base station.
7. device according to claim 6 is characterized in that, also comprises:
Sending module; Be used for after the proportioning situation of the ascending-descending subframes at the corresponding levels of base station at the corresponding levels changes; The current proportioning situation of ascending-descending subframes at the corresponding levels is sent to subordinate base station, so that said subordinate base station is according to the current proportioning situation configuration subordinate ascending-descending subframes of said ascending-descending subframes at the corresponding levels.
8. device according to claim 6 is characterized in that, also comprises:
Detection module; Be used for before higher level's reference signal that said reception upper-level BTS sends from air interface; Receive the primary and secondary synchronization signals that send each base station from said air interface, from said primary and secondary synchronization signals, detect the maximum primary and secondary synchronization signals of signal strength signal intensity;
Initial synchronization module is used for the upper-level BTS of the base station of sending the maximum primary and secondary synchronization signals of said signal strength signal intensity as base station at the corresponding levels, with the initial synchronisation of realization with said upper-level BTS.
9. device according to claim 6 is characterized in that, also comprises:
First configuration module; Be used for attribute configuration with the descending sub frame at the corresponding levels of said base station at the corresponding levels for receiving attribute; The attribute configuration of higher level's descending sub frame corresponding with said descending sub frame at the corresponding levels in the said upper-level BTS is the transmission attribute; With the attribute configuration of subordinate's descending sub frame corresponding in the said subordinate base station with said descending sub frame at the corresponding levels for receiving attribute, and with the said subordinate descending sub frame subframe that is configured to mourn in silence;
Second configuration module; Be used for the attribute configuration of the next descending sub frame at the corresponding levels of descending sub frame at the corresponding levels described in the said base station at the corresponding levels for sending attribute, the attribute configuration of subordinate's descending sub frame corresponding with said next one descending sub frame at the corresponding levels in the said subordinate base station is the reception attribute.
10. according to each described device among the claim 6-9; It is characterized in that; Said descending sub frame at the corresponding levels is a descending multimedia broadcasting SFN MBSFN subframe at the corresponding levels, and said higher level's reference signal is a higher level MBSFN reference signal, and said subordinate reference signal is the MBSFN of a subordinate reference signal.
11. a base station is characterized in that, comprises each described network intercepting synchronizer among the claim 6-10.
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