CN105917711A - Communication system, base station and clock synchronization method - Google Patents
Communication system, base station and clock synchronization method Download PDFInfo
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- CN105917711A CN105917711A CN201480033986.0A CN201480033986A CN105917711A CN 105917711 A CN105917711 A CN 105917711A CN 201480033986 A CN201480033986 A CN 201480033986A CN 105917711 A CN105917711 A CN 105917711A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
Provided are a communication system, a base station and a clock synchronization method. In a co-frequency networking scenario, by receiving a signal sent by a reference base station and maintaining that the signal is not sent out on a specific time slot, a non-reference base station acquires frame timing information and frame number information carried in the signal sent by the reference base station, and the non-reference base station is synchronized to the reference base station, thereby realizing the air interface synchronization between base stations in a co-frequency network, and satisfying the demand of the co-frequency network for clock synchronization.
Description
The present embodiments relate to wireless communication field, more particularly to a kind of communication system, base station and clock synchronizing method.
Growing with the communication technology, the demand that user covers to the capacity of data transmission service, quality and depth is stronger.In order to give user equipment (user equipment, UE) more preferable communication service is provided, and the traffic load of shunting macro network, using small base station deployment in focus, blind spot, cell edge even room area, supplementary function is played in the signal covering to macro base station.Wherein, the region of macro base station covering is referred to as macrocell (macro cell), and the smaller hot spot region that small base station is covered is referred to as Microcell or cell (small cell).
Carried out in macro base station and at least one small base station under the networking scene of collaboration communication, can realize that clock is synchronous, directly affects percent of call completed, cutting off rate of talk business etc. between macro base station and small base station.Therefore, in order to improve communication quality, it need to ensure that the clock between macro base station and at least one small base station is synchronous.In the prior art, base station is generally used as by macro base station, it is synchronized to the timing reference input of outside, such as global positioning system (Global Position System, GPS), reference clock is produced, small base station receives the signal that macro base station is sent by eating dishes without rice or wine, according to the frequency and phase information of the macro base station carried in the signal received, realize that the relative time clock of frequency and phase is synchronous between macro base station.
When small base station and macro base station composition are with frequency net (Single Frequency Network, SFN) cell, small base station will be unable to demodulate the signal of macro base station, and then it is synchronous to enter row clock according to the signal of macro base station；If the non-referenced station being synchronized to outside the macro base station, clock accuracy is poor.
The content of the invention
The embodiments of the invention provide a kind of clock synchronizing method, the clock synchronization issue of same frequency net cell can be solved, the embodiment of the present invention additionally provides a kind of communication system and base station.
First aspect, the embodiments of the invention provide a kind of communication system, including the Reference BTS by idle port communication and non-referenced base station, the signal cover of the Reference BTS covers the signal cover of the non-referenced base station, the Reference BTS is constituted with frequency net cell with the non-referenced base station, with identical subdistrict frequency point and cell identity information；Wherein, the Reference BTS, for sending signal to the non-referenced base station；The non-referenced base station, for receiving the signal that the Reference BTS is sent on particular time-slot, obtains the frame timing information and frame number information carried in the signal；According to the frame timing information and frame number information, by the non-referenced base station synchronization to the Reference BTS；And the non-referenced base station keeps silent on the particular time-slot.
In the first possible implementation of first aspect, the Reference BTS is macro base station, or, the Reference BTS is positioned at the small base station of central area.
With reference to a kind of possible implementation of any of the above, in second of possible implementation of first aspect, the non-referenced base station keeps silence to include on the particular time-slot, and other base stations of the non-referenced base station on the particular time-slot not into the communication system send signal of eating dishes without rice or wine.
With reference to a kind of possible implementation of any of the above, in the third possible implementation of first aspect, it is described according to the frame timing information and frame number information, the non-referenced base station synchronization is included to the Reference BTS, the receiver of eating dishes without rice or wine of the non-referenced base station parses the signal that the Reference BTS is sent, recover the frame timing information and frame number information of the Reference BTS, the difference on the frequency, phase difference and frame number between the calculating Reference BTS and the non-referenced base station are poor.
With reference to a kind of possible implementation of any of the above, in the 4th kind of possible implementation of first aspect, the particular time-slot is 10 milliseconds of frames.
Second aspect, the embodiments of the invention provide a kind of base station, including, receiving unit, for receiving the signal that Reference BTS is sent by eating dishes without rice or wine on particular time-slot；Resolution unit, the frame timing information and frame number information carried for obtaining in the signal；Synchronization unit, for according to the frame timing information and frame number information, by the base station synchronization to the Reference BTS, and controls the base station to keep silent on the particular time-slot；Wherein, the base station is constituted with frequency net cell with the Reference BTS, and with identical subdistrict frequency point and cell identity information, the signal cover of the Reference BTS covers the base station
Signal cover.
In the first possible implementation of second aspect, the Reference BTS is macro base station；Or, the Reference BTS is positioned at the small base station of central area.
With reference to a kind of possible implementation of any of the above, in second of possible implementation of second aspect, the base station keeps silence to include on the particular time-slot, and other base stations of the base station on the particular time-slot not into the same frequency net cell send signal of eating dishes without rice or wine.
With reference to a kind of possible implementation of any of the above, in the third possible implementation of second aspect, it is described according to the frame timing information and frame number information, the base station synchronization is included to the Reference BTS, the receiver of eating dishes without rice or wine of the base station parses the signal that the Reference BTS is sent, recover the frame timing information and frame number information of the Reference BTS, the difference on the frequency, phase difference and frame number between the calculating Reference BTS and the non-referenced base station are poor.
With reference to a kind of possible implementation of any of the above, in the 4th kind of possible implementation of second aspect, the particular time-slot is 10 milliseconds of frames.
The third aspect, the embodiments of the invention provide a kind of clock synchronizing method, including, non-referenced base station receives the signal that Reference BTS is sent on particular time-slot by eating dishes without rice or wine, and the non-referenced base station keeps silent on the particular time-slot；The non-referenced base station obtains the frame timing information and frame number information carried in the signal；The non-referenced base station is synchronized to the Reference BTS according to the frame timing information and frame number information；Wherein, the non-referenced base station is constituted with frequency net cell with the Reference BTS, and with identical subdistrict frequency point and cell identity information, the signal cover of the Reference BTS covers the signal cover of the non-referenced base station.
In the first possible implementation of the third aspect, the Reference BTS is macro base station, or, the Reference BTS is positioned at the small base station of central area.
With reference to a kind of possible implementation of any of the above, in second of possible implementation of the third aspect, the non-referenced base station keeps silence to include on the particular time-slot, and other base stations of the non-referenced base station on the particular time-slot not into the same frequency net cell send signal of eating dishes without rice or wine.
With reference to a kind of possible implementation of any of the above, in the third possible realization side of the third aspect
It is described to be included the non-referenced base station synchronization to the Reference BTS according to the frame timing information and frame number information in formula,
The receiver of eating dishes without rice or wine of the non-referenced base station parses the signal that the Reference BTS is sent, and recovers the frame timing information and frame number information of the Reference BTS, and the difference on the frequency, phase difference and frame number between the calculating Reference BTS and the non-referenced base station are poor.
With reference to a kind of possible implementation of any of the above, in the 4th kind of possible implementation of the third aspect, the particular time-slot is 10 milliseconds of frames.
Pass through technical scheme disclosed in the embodiment of the present invention, under identical networking scene, non-referenced base station is on particular time-slot by receiving the signal of Reference BTS transmission and keeping not being sent out signal, obtain the frame timing information and frame number information carried in the signal that Reference BTS is sent, by non-referenced base station synchronization to the Reference BTS, the air interface synchronization between base station in being netted with frequency is realized, is met with the frequency net demand synchronous to clock.
Technical scheme in order to illustrate the embodiments of the present invention more clearly, the accompanying drawing used required in being described below to embodiment is briefly described, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of application scenarios schematic diagram of the embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of communication system provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of base station provided in an embodiment of the present invention；
Fig. 4 is a kind of schematic flow sheet of clock synchronizing method provided in an embodiment of the present invention；
Fig. 5 is the structural representation of another base station provided in an embodiment of the present invention.
Technical scheme provided in an embodiment of the present invention is applied to plurality of communication systems, for example, mobile (GSM, the global system for mobile communication) system in the whole world, CDMA (CDMA,
Code division multiple access) system, WCDMA (Wideband Code Division Multiple Access, WCDMA) system, TD SDMA (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA) system, Long Term Evolution (Long-Term Evolution, LTE) system and the communication system of the follow-up evolution of LTE.
The present embodiments relate to macro base station or small base station can be GSM or CDMA base transceiver station (BTS, base transceiver station), or the node B (Node-B) in WCDMA or TD-SCDMA system, or the evolved node B (e-NodeB in LTE communication system, evolved NodeB), and the similar base station equipment in the communication system of the follow-up evolution of LTE.
Small base station described in the embodiment of the present invention includes microcell base station (micro cell base station), micromicro honeycomb base station (pico cell base station), access point (AP, access point) etc. similar devices, the embodiment of the present invention is not specially limited to this.
The embodiment of the present invention will be illustrated with LTE system, but it is understood that, application of the technical scheme provided in an embodiment of the present invention in other communication systems is similar with LTE system, repeats no more.
Fig. 1 is the networking scene schematic diagram of a kind of macro base station and small base station communication for coordination, in this scenario, including a macro base station, and labeled as macro1, three microcell base stations are respectively labeled as micro1, micro2, micro3.Macro base station is independently disposed with each microcell base station, can pass through idle port communication between each base station equipment.UE enters after macro base station signal cover, macro base station can be accessed and communication service is obtained, after the UE enters microcell base station signal cover, such as enter after micro1 signal covers, UE partial service data can be handled by micro1 and macro1 are sent to by eating dishes without rice or wine, collaboration processing is carried out by macro1, UE communication quality is lifted.
Wherein, macro1 can receive gps signal as Reference BTS, realize, the generation Reference BTS working time synchronous with GPS's, micro1, micro2, micro3 can pass through air interface synchronization to macro1.As macro1 and micro1, micro2, when micro3 is further constituted with frequency net cell, each above-mentioned base station equipment has identical subdistrict frequency point and cell ID (cell ID, cell identity), using identical networking, geographical position can be solved to be separated by compared with the problem of co-channel interference is excessive between the base station closely caused, and then frequency efficiency is improved, while reducing the demand of terminal band support, reduce the complexity of terminal radio frequency passage.
But, because the frequency of each base station is identical with cell ID, identical frequency and cell identity information are carried in the signal that each base station is sent, the signal that any one microcell base station None- identified is received comes from macro base station or other microcell base stations, any one signal that such as micro1 is received by eating dishes without rice or wine, the frequency of the signal and the cell identity information carried are macro1 and micro1, micro2, what micro3 was shared, therefore micro1 can not judge whether the signal comes from macro1, and then micro1 can not realize the relative synchronization with macro1 according to the clock information of signal carrying, it is unable to reach the synchronization accuracy requirement of same frequency net cell, influence systematic function.
Fig. 2 is a kind of communication system schematic diagram provided in an embodiment of the present invention, the communication system includes, Reference BTS 101, non-referenced base station 102, the signal cover of Reference BTS 101 covers the signal cover of non-referenced base station 102, Reference BTS 101 constitutes same frequency net cell with non-referenced base station 102, and same frequency net cell is constituted with identical subdistrict frequency point and identical cell ID, i.e. Reference BTS 101 and non-referenced base station 102.
Reference BTS 101, for sending signal to non-referenced base station 102.
It is appreciated that Reference BTS 101 continues to send signal to non-referenced base station 102, the signal can be any wireless signal for including information of eating dishes without rice or wine, such as voice signal, or test signal etc..
Alternatively, Reference BTS 101 can be synchronized to external clock reference, such as GPS, produce a base station fiducial time.
Non-referenced base station 102, for receiving the signal that Reference BTS 101 is sent on particular time-slot, obtains the frame timing information and frame number information carried in the signal；According to the frame timing information and frame number information, non-referenced base station 102 is synchronized to Reference BTS 101；And non-referenced base station 102 keeps silent on the particular time-slot.
Wherein, frame timing is referred to as frame phase, and frame timing information includes the initial time in the cycle of the corresponding data frame of the signal.
Wherein, obtain the frame timing information carried in the signal and frame number information can be that any one parsing is eated dishes without rice or wine the method for signal, the signal is for example demodulated, the frame timing information or frame number information carried in certain data bit is extracted, the embodiment of the present invention is not specially limited to this.
Wherein, non-referenced base station 102 keeps silence to refer on particular time-slot, other base stations not into the communication system on the particular time-slot of non-referenced base station 102 send eat dishes without rice or wine signal, i.e. non-referenced base station 102 reception of signal is only carried out on the particular time-slot and without the transmission of signal.
It is appreciated that, when communication system includes multiple non-referenced base stations, multiple non-referenced base stations keep silent on same particular time-slot, then the signal for the only Reference BTS that any one in multiple non-referenced base stations is at a time received, causes to obscure without receiving the signal of other non-referenced base stations.Wherein it is possible to configure same particular time-slot in each non-referenced base station, it can specifically be realized with software mode, the embodiment of the present invention is not specially limited to this.
The embodiment of the present invention is not specially limited to the selection mode of particular time-slot, can be determined according to the definition of eating dishes without rice or wine of communication system standard, for example, in LTE system, above-mentioned particular time-slot can be the frame of 10 milliseconds (ms)；In gsm system, above-mentioned particular time-slot can be 60ms frame.
Alternatively, above-mentioned particular time-slot can be one or more continuous frames, for example N*10ms frames or N*60ms frames (N >=1, N is integer), and the embodiment of the present invention is not specially limited to this.
Alternatively, non-referenced base station can set a particular time-slot at interval of a period of time, receive the signal of base station and handled, interval time can be same or different, can be determined according to performance requirements.Clock is synchronous between by periodically carrying out base station, the synchronous precision of lifting clock.
The embodiment of the present invention is not specially limited to the base station type for constituting same frequency net cell, this is with can include macro base station and at least one small base station in frequency net cell, multiple macro base stations and at least one small base station can also be included, a variety of networking types such as multiple macro base stations can also be included.
Alternatively, a macro base station and other base stations can be included in the communication system, wherein, Reference BTS 101 is macro base station, and non-referenced base station 102 is other base stations.Specifically, under the scene, macro base station and other base stations are constituted with frequency net cell, the time that other base stations pass through air interface synchronization to macro base station, and macro base station can be synchronized to external time by modes such as GPS, the relative synchronization between each base station in same frequency net cell is realized, lock in time is accurate.
Alternatively, the Reference BTS 101 can be that the non-referenced base station 102 is other base stations in addition to the small base station of the central area positioned at the small base station of central area.Specifically, under the scene,
It regard the small base station that a geographical position is located at central area in same frequency net cell as Reference BTS, the Reference BTS is synchronized to external clock reference, for example it is synchronized to GPS, or air interface synchronization to this with frequency net outside other base stations, and this passes through air interface synchronization to the Reference BTS respectively with other base stations in frequency net, the clock synchronisation requirement with frequency net is met, cost is low.
Other base stations described in the embodiment of the present invention are included with the every other base station in frequency net cell in addition to Reference BTS, and the type of base station is not limited.For example, when Reference BTS is macro base station, other base stations include small base station or other macro base stations；When Reference BTS is positioned at the small base station of central area, other base stations include other small base stations or macro base station.
Wherein, the base station of Reference BTS can be selected as according to the network planning and network optimization requirement, basic principle is that the signal coverage areas of Reference BTS will cover the signal coverage areas of non-referenced base station, therefore, and selection macro base station or the small base station positioned at central area are all optional schemes.
Alternatively, it is described according to the frame timing information and frame number information, the non-referenced base station synchronization is included to the Reference BTS, the receiver of eating dishes without rice or wine of the non-referenced base station parses the signal that the Reference BTS is sent, recover the frame timing information and frame number information of the Reference BTS, the phase difference, difference on the frequency and frame number between the calculating Reference BTS and the non-referenced base station are poor.
Specifically, exemplified by using macro base station as Reference BTS, macro base station normal work, downstream signal is sent by eating dishes without rice or wine to small base station, small base station simulation UE parses the downstream signal, the frame timing information and frame number information of the macro base station carried in downstream signal are obtained, and it is poor to calculate the phase difference between macro base station and at least one small base station, difference on the frequency and frame number.Phase difference, difference on the frequency and the frame number obtained according to calculating is poor, and synchronization is tracked using air interface synchronization algorithm, completes air interface synchronization.Wherein it is possible to which using any one air interface synchronization algorithm, such as PD algorithms, pid algorithm, the embodiment of the present invention is not specially limited to this.
Using communication system provided in an embodiment of the present invention, under identical networking scene, non-referenced base station is on particular time-slot by receiving the signal of Reference BTS transmission and keeping not being sent out signal, obtain the frame timing information and frame number information carried in the signal that Reference BTS is sent, by non-referenced base station synchronization to the Reference BTS, the air interface synchronization between base station in being netted with frequency is realized, is met with the frequency net demand synchronous to clock.
Fig. 3 is a kind of structural representation of base station provided in an embodiment of the present invention, and the base station includes receiving unit 201, resolution unit 202 and synchronization unit 203.Wherein,
Receiving unit 201, for receiving the signal that Reference BTS is sent by eating dishes without rice or wine on particular time-slot.
Resolution unit 202, the frame timing information and frame number information carried for obtaining in signal.
Synchronization unit 203, for according to the frame timing information and frame number information, by the base station synchronization to Reference BTS；And control the base station to keep silent on the particular time-slot.
Wherein, above-mentioned base station is constituted with frequency net cell with Reference BTS, and with identical subdistrict frequency point and cell identity information, the signal cover of the Reference BTS covers the signal cover of the base station.
Wherein, base station keeps silence to include on the particular time-slot, and other base stations of the base station on particular time-slot not into the same frequency net cell send signal of eating dishes without rice or wine.
The embodiment of the present invention is not specially limited to the selection mode of particular time-slot, can determine that for example in LTE system, above-mentioned particular time-slot can be 10 ms frame according to the definition of eating dishes without rice or wine of communication system standard.
Alternatively, above-mentioned particular time-slot can be one or more continuous frames, and the embodiment of the present invention is not specially limited to this.The specific description being referred in Fig. 2 embodiments, will not be described here.
Alternatively, receiving unit 201 can set a particular time-slot at interval of a period of time, receive the signal of base station and handled, interval time can be same or different, can be determined according to performance requirements.Clock is synchronous between by periodically carrying out base station, the synchronous precision of lifting clock.
Alternatively, Reference BTS is macro base station, and the base station is other base stations in addition to macro base station, and above-mentioned macro base station is synchronized to by the mode of eating dishes without rice or wine.Specifically, under the scene, macro base station and other base stations are constituted with frequency net cell, the time that other base stations pass through air interface synchronization to macro base station, and macro base station can be synchronized to external clock reference by modes such as GPS or air interface synchronizations and produce base station fiducial time, the air interface synchronization between each base station in same frequency net cell is realized, lock in time is accurate.
Alternatively, Reference BTS can be that non-referenced base station is other base stations in addition to the small base station, and base station provided in an embodiment of the present invention is any one base station in other base stations positioned at the small base station of central area.Specifically, under the scene, a geographical position in same frequency net cell is located to the small base station of central area as Reference BTS, the Reference BTS is synchronized to external clock reference, and other base stations pass through sky respectively
Mouth is synchronized to the Reference BTS, meets the clock synchronisation requirement with frequency net, and cost is low, and synchronous effect is good.
Alternatively, the synchronization unit 203 can be specifically for completing the air interface synchronization between base station using air interface synchronization algorithm.Specific synchronous method is referred to the associated description in embodiment illustrated in fig. 2, will not be described here.
The embodiment of the present invention is not specially limited to the connected mode of above-mentioned receiving unit 201, resolution unit 202 and synchronization unit 203.As shown in figure 3, above three unit can be in communication with each other by bus connecting mode.Do not show in figure, above three unit can also be communicated by other direct or indirect connection modes.
It is appreciated that the base station that Fig. 3 embodiments are provided can be the non-referenced base station in the embodiment of communication system shown in Fig. 2, the detailed description to each unit function of the base station is referred to the related content of embodiment illustrated in fig. 2, will not be described here.
Using base station provided in an embodiment of the present invention, under identical networking scene, the base station is on particular time-slot by receiving the signal of Reference BTS transmission and keeping not being sent out signal, obtain the frame timing information and frame number information carried in the signal that Reference BTS is sent, by the base station synchronization to the Reference BTS, the air interface synchronization between base station in being netted with frequency is realized, is met with the frequency net demand synchronous to clock.
Fig. 4 is a kind of clock synchronizing method schematic flow sheet provided in an embodiment of the present invention.The method comprising the steps of S301-S303：
S301：Non-referenced base station receives the signal that Reference BTS is sent on particular time-slot by eating dishes without rice or wine, and the non-referenced base station keeps silent on the particular time-slot.
S302：The non-referenced base station obtains the frame timing information and frame number information carried in the signal.
S303：The non-referenced base station is synchronized to the Reference BTS according to the frame timing information and frame number information.
Wherein, the non-referenced base station is constituted with frequency net cell with the Reference BTS, and with identical subdistrict frequency point and cell identity information, the signal cover of the Reference BTS covers the signal cover of the non-referenced base station.
Wherein, the non-referenced base station keeps silence to include on the particular time-slot, and other base stations of the non-referenced base station on the particular time-slot not into the same frequency net cell send signal of eating dishes without rice or wine.
Alternatively, it is described according to the frame timing information and frame number information, the non-referenced base station synchronization is included to the Reference BTS, the receiver of eating dishes without rice or wine of the non-referenced base station parses the signal that the Reference BTS is sent, recover the frame timing information and frame number information of the Reference BTS, the difference on the frequency, phase difference and frame number between the calculating Reference BTS and the non-referenced base station are poor.
Alternatively, the Reference BTS is macro base station, and the base station is this with other base stations in frequency net cell in addition to the macro base station.
Alternatively, the non-referenced base station is that, positioned at the small base station of central area, the base station is this with other base stations in frequency net cell in addition to the small base station for being located at central area.
The embodiment of the present invention is not specially limited to the selection mode of particular time-slot, can determine that for example in LTE system, above-mentioned particular time-slot can be 10 ms frame according to the definition of eating dishes without rice or wine of communication system standard.
Alternatively, above-mentioned particular time-slot can be one or more continuous frames, and the embodiment of the present invention is not specially limited to this.The specific description being referred in Fig. 2 embodiments, will not be described here.
It is appreciated that in communication system provided in an embodiment of the present invention, multiple non-referenced base stations can be included, each non-referenced base station can configure same particular time-slot, Reference BTS is synchronized to using clock synchronizing method provided in an embodiment of the present invention.
It is appreciated that, clock synchronizing method provided in an embodiment of the present invention can be the method that the non-referenced base station in embodiment illustrated in fig. 2 is performed, the method that base station that can also as shown in Figure 3 in embodiment is performed, method flow is referred to the description of the correlation module function or step in other embodiments of the invention, will not be described here.
Using clock synchronizing method provided in an embodiment of the present invention, under identical networking scene, non-referenced base station is on particular time-slot by receiving the signal of Reference BTS transmission and keeping not being sent out signal, obtain the frame timing information and frame number information carried in the signal that Reference BTS is sent, by non-referenced base station synchronization to the Reference BTS, the air interface synchronization between base station in being netted with frequency is realized, is met with the frequency net demand synchronous to clock.
Fig. 5 is the structural representation of another base station provided in an embodiment of the present invention.The base station includes receiver 401, memory 402, and processor 403.Wherein,
Receiver 401, for receiving the signal that Reference BTS is sent by eating dishes without rice or wine on particular time-slot.
Memory 402, for storing some instructions, the instruction includes, and obtains the frame timing information and frame number information carried in signal；According to the frame timing information and frame number information, by the base station synchronization to Reference BTS；And control the base station to keep silent on the particular time-slot.
Processor 403, the instruction for performing the storage of memory 402.
Wherein, above-mentioned base station is constituted with frequency net cell with Reference BTS, and with identical subdistrict frequency point and cell identity information, the signal cover of the Reference BTS covers the signal cover of the base station.
Wherein, control base station keeps silence to include on the particular time-slot, controls other base stations of the base station not into the same frequency net cell on particular time-slot to send signal of eating dishes without rice or wine.
The embodiment of the present invention is not specially limited to the selection mode of particular time-slot, can determine that for example in LTE system, above-mentioned particular time-slot can be 10 ms frame according to the definition of eating dishes without rice or wine of communication system standard.
Alternatively, above-mentioned particular time-slot can be one or more continuous frames, and the embodiment of the present invention is not specially limited to this.The specific associated description being referred in other embodiments of the invention, will not be described here.
Alternatively, memory 402 can also store some instructions, including set a particular time-slot at interval of a period of time, indicate that receiver 401 receives the signal of base station and handled, interval time can be same or different, can be determined according to performance requirements.Clock is synchronous between by periodically carrying out base station, the synchronous precision of lifting clock.Processor 403 can perform above-mentioned instruction.
Alternatively, the Reference BTS is macro base station, and the non-referenced base station is this with other base stations in frequency net cell in addition to the macro base station.
Alternatively, the non-referenced base station is that, positioned at the small base station of central area, the non-referenced base station is this with other base stations in frequency net cell in addition to the small base station for being located at central area.
Alternatively, the processor can be specifically for completing the air interface synchronization between base station using air interface synchronization algorithm.Specific synchronous method is referred to the associated description in other embodiments of the invention, herein not
Repeat.
The embodiment of the present invention is not specially limited to above-mentioned connected mode.As shown in figure 3, above-mentioned receiver 401, memory 402, and processor 403 can be in communication with each other by the connected mode of communication bus.Do not show in figure, said apparatus can also be communicated by other direct or indirect connection modes.
The base station can also include communication interface 404, for carrying out information exchange between other base stations.The base station can also include power subsystem 405, or hop, or alarm part, either antenna feeder part or Operation and Maintenance part, one of ordinary skill in the art will appreciate that, according to different implementations, base station can have different parts, and the present embodiment is not limited this, and limit is not done and is enumerated.
The communication bus can be local bus (local bus).
Alternatively, the receiver 403 can be transceiver or far-end RF module (remote radio unit, RRU).
Alternatively, the memory 402 can be the various types of memory/medium of the prior art such as flash memories (flash memory) or random access memory (random access memory, RAM), be not specially limited herein.
Alternatively, the processor 403 can be polycaryon processor, it can also be the processor for disperseing on geographical position and being connected with communication link, can be CPU (central processing unit, CPU), can also be digital signal processor (digital signal processor, DSP) or other specialized processors.
Optionally, the memory 402 and processor 403 can be integrated in the baseband processing unit of base station (base band unit, BBU).
It is appreciated that, the base station that Fig. 5 embodiments are provided can be the non-referenced base station in the embodiment of communication system shown in Fig. 2, and it is similar with the function of base station shown in Fig. 3 embodiments, the clock synchronizing method shown in Fig. 4 embodiments can be performed, detailed description to each unit function of the base station is referred to the related content of other embodiments of the invention, will not be described here.
Using base station provided in an embodiment of the present invention, under identical networking scene, the base station, by receiving the signal of Reference BTS transmission and keeping not being sent out signal, obtains the letter that Reference BTS is sent on particular time-slot
The frame timing information and frame number information carried in number, by the base station synchronization to the Reference BTS, realizes the air interface synchronization between base station in being netted with frequency, meets with the frequency net demand synchronous to clock.
It is appreciated that, " first ", " second " for occurring in the embodiment of the present invention etc. is described merely to distinguishing different objects, there is no the limitation of sequencing, do not indicate that in the embodiment of the present invention yet and equipment number is particularly limited to, it is impossible to constitute any limitation to the embodiment of the present invention.
It is appreciated that " multiple " that occur in the embodiment of the present invention refer to two or more.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the equipment of foregoing description and the specific work process of module may be referred to the corresponding process description in preceding method embodiment.
In several embodiments provided herein, it should be understood that disclosed apparatus and method, it can realize by another way.For example, device embodiment described above is only schematical, for example, the division of the module, it is only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple module or components can be combined or be desirably integrated into another equipment, or some features can be ignored, or do not perform.
Can be that modules are individually physically present in addition, each functional module in each of the invention embodiment can be integrated in a processing module, can also two or more modules be integrated in a module.
One of ordinary skill in the art will appreciate that implementing all or part of step of above-described embodiment can be completed by hardware, the hardware of correlation can also be instructed to complete by program, described program can be stored in a kind of computer-readable medium, storage medium mentioned above can be read-only storage, disk or CD etc..
It is last it should be noted that：Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (11)
- A kind of communication system, it is characterized in that, including the Reference BTS by idle port communication and non-referenced base station, the signal cover of the Reference BTS covers the signal cover of the non-referenced base station, the Reference BTS is constituted with frequency net cell with the non-referenced base station, with identical subdistrict frequency point and cell identity information；Wherein,The Reference BTS, for sending signal to the non-referenced base station；The non-referenced base station, for receiving the signal that the Reference BTS is sent on particular time-slot, obtains the frame timing information and frame number information carried in the signal；According to the frame timing information and frame number information, by the non-referenced base station synchronization to the Reference BTS；And the non-referenced base station keeps silent on the particular time-slot.
- Communication system according to claim 1, it is characterised in thatThe Reference BTS is macro base station, or, the Reference BTS is positioned at the small base station of central area.
- Communication system according to claim 1 or 2, it is characterised in that the non-referenced base station keeps silence to include on the particular time-slot,Other base stations of the non-referenced base station on the particular time-slot not into the communication system send signal of eating dishes without rice or wine.
- According to any described communication systems of claim 1-3, it is characterised in that described to be included the non-referenced base station synchronization to the Reference BTS according to the frame timing information and frame number information,The receiver of eating dishes without rice or wine of the non-referenced base station parses the signal that the Reference BTS is sent, and recovers the frame timing information and frame number information of the Reference BTS, and the difference on the frequency, phase difference and frame number between the calculating Reference BTS and the non-referenced base station are poor.
- According to any described communication systems of claim 1-4, it is characterised in that the particular time-slot is 10 milliseconds of frames.
- A kind of base station, it is characterised in that including,Receiving unit, for receiving the signal that Reference BTS is sent by eating dishes without rice or wine on particular time-slot；Resolution unit, the frame timing information and frame number information carried for obtaining in the signal；Synchronization unit, for according to the frame timing information and frame number information, by the base station synchronization to the Reference BTS, and controls the base station to keep silent on the particular time-slot；Wherein, the base station is constituted with frequency net cell with the Reference BTS, and with identical subdistrict frequency point and cell identity information, the signal cover of the Reference BTS covers the signal cover of the base station.
- Base station according to claim 6, it is characterised in thatThe Reference BTS is macro base station, or, the Reference BTS is positioned at the small base station of central area.
- Base station according to claim 6 or 7, it is characterised in that the base station keeps silence to include on the particular time-slot,Other base stations of the base station on the particular time-slot not into the same frequency net cell send signal of eating dishes without rice or wine.
- A kind of clock synchronizing method, it is characterised in that including,Non-referenced base station receives the signal that Reference BTS is sent on particular time-slot by eating dishes without rice or wine, and the non-referenced base station keeps silent on the particular time-slot；The non-referenced base station obtains the frame timing information and frame number information carried in the signal；The non-referenced base station is synchronized to the Reference BTS according to the frame timing information and frame number information；Wherein, the non-referenced base station is constituted with frequency net cell with the Reference BTS, and with identical subdistrict frequency point and cell identity information, the signal cover of the Reference BTS covers the signal cover of the non-referenced base station.
- Method according to claim 9, it is characterised in thatThe Reference BTS is macro base station, or, the Reference BTS is positioned at the small base station of central area.
- Method according to claim 9 or 10, it is characterised in that the non-referenced base station keeps silence to include on the particular time-slot,Other base stations of the non-referenced base station on the particular time-slot not into the same frequency net cell send signal of eating dishes without rice or wine.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2014/094811 WO2016101174A1 (en) | 2014-12-24 | 2014-12-24 | Communication system, base station and clock synchronization method |
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| CN105917711A true CN105917711A (en) | 2016-08-31 |
| CN105917711B CN105917711B (en) | 2019-11-19 |
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| WO (1) | WO2016101174A1 (en) |
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| CN109219063A (en) * | 2017-06-29 | 2019-01-15 | 中国移动通信有限公司研究院 | Communication means, device and base station between a kind of base station |
| CN114554515A (en) * | 2022-04-21 | 2022-05-27 | 广州世炬网络科技有限公司 | Method and device for judging time synchronization of 5G base station |
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| CN108012320B (en) * | 2016-10-28 | 2021-06-18 | 中兴通讯股份有限公司 | Method, device and system for realizing air interface synchronization of base station |
| CN111278102B (en) * | 2020-01-16 | 2022-08-09 | 深圳前海中电慧安科技有限公司 | Base station synchronization method, device, server and storage medium |
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Also Published As
| Publication number | Publication date |
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| WO2016101174A1 (en) | 2016-06-30 |
| CN105917711B (en) | 2019-11-19 |
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