CN102177666B - User terminal assisted out-of-synchronization detection - Google Patents
User terminal assisted out-of-synchronization detection Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
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Abstract
A control module, a computer readable medium and a method for determining when a first base station (BS1) in a telecommunication network (20) is out of synch with the network (20), the network (20) including at least a second base station (BS2) and a user terminal (26) configured to receive signals from the first and second base stations (BS1, BS2). The method includes receiving in a control module (28) of the network (20) a measuring report from the user terminal (26), where the measuring report includes a first time of arrival (Ta1) of a first signal from the first base station (BS1) to the user terminal (26) and a second time of arrival (Ta2) of a second signal from the second base station (BS2) to the user terminal (26); receiving a maximum of a travel time difference (max(T1 - T2)) between (i) a first travel time (T 1) of the first signal from the first base station (BS 1) to the user terminal (26), and (ii) a second travel time (T2) of the second signal from the second base station (BS2) to the user terminal (26); determining a minimum of a difference starting time (min(T0 - T0')), which corresponds to a time offset between a starting time (T0) of the first signal and a starting time (T0') of the second signal, as a difference between (i) a difference between the first time of arrival (Ta1) and the second time of arrival (Ta2), and (ii) the maximum travel time difference (max(T1 - T2)); comparing the determined minimum difference starting time (min(T0 - T0')) with a predetermined threshold; and identifying the pair of the first base station (BS1) and the second base station (BS2) as including one base station that lost the synch with the network, when the determined minimum difference starting time (min(T0-T0')) is larger than the predetermined threshold in the comparing step.
Description
Technical field
The present invention relates generally to radio communications system, device, software and method, and the mechanism related more specifically to for detecting nonsynchronous base station and/or community with communication network and technology.
Background technology
In the past in the several years, people increase the concern to the radio access technologies for providing speech, video and data, services.Use in cellular communications and have multiple telecommunication technology.The most extensive radio access technologies for mobile communication is digital cellular.The concern of increase is demonstrated in 3G (third generation) system.
This type of third generation system is TD SDMA (TD-SCDMA), the 3G telecommunication standard of China's implementation.TD-SCDMA is based on spread spectrum.This standard is started to adopt by 3GPP (third generation partner program) from being called the Rel-4 of " UTRA TDD 1.28Mcps Option ", and its full content is included in herein by reference.
Be different from Frequency Division Duplexing (FDD) (FDD) scheme used in Wideband Code Division Multiple Access (WCDMA) (W-CDMA), TD-SCDMA uses time division duplex (TDD).Be used for the number of timeslots of down link and up link by dynamic conditioning, this system can adapt to than FDD scheme non-symmetrical service down link and up link having different data rate requirement more like a cork.Because it does not require the paired spectrum of down link and up link, therefore, compose allocation flexibility also to increase.In addition, for up link and down link use identical carrier frequency to mean, channel conditions is identical in the two directions, and downlink channel information can be inferred from uplink channel estimation in base station, and this contributes to the application of beam-forming technology.
Except the CDMA used in WCDMA, TD-SCDMA also uses time division multiple access (TDMA).It reduce the number of users in each time slot, thus reduce Multiuser Detection and Wave beam forming scheme realize complexity, but discontinuous transmission also reduces covering (owing to needing higher peak power) and mobility (power control frequencies due to lower).
" S " expression " synchronously " in TD-SCDMA, this means that uplink signal is synchronous at base station receiver, is realized by the adjustment of continuous print sequential.This is by improving the orthogonality between code, and the interference between the user reducing the identical time slot using different code, therefore increase power system capacity, but cost realizes hardware complexity certain in uplink synchronisation.
TD-SCDMA is time-division system, and wherein, every sub-radio frame 10 (see Fig. 1) can have two uplink transition point SP1 and SP2.In other words, as shown in Figure 1, interval DT, interval UT when being uplink service afterwards when sub-radio frame 10 can comprise Downlink traffic broadcast are in addition another DT afterwards.A DT in Fig. 1 can be configured to carry Broadcasting Control business, such as, carries the physical channel (PCCPCH) of broadcast channel.Because down link and uplink service all occur in identical subframe 10, therefore, transition point SP1 and SP2 is for separating uplink service and downlink traffic.When considering the down link of neighbor cell and uplink service, then community subframe must synchronous in the time (be in synchronous in) with the uplink temporal phase signal of current area shown in the down link signal effect diagram 1 avoiding neighbor cell.Therefore, need to safeguard that the synchronous mechanism of whole radio net is to avoid these problems.
This problem solves at present in the following manner.If it is synchronous that community base station is lost with other base station of network, then this base station will show and the nonsynchronous down link in other community and uplink service, that is, lose synchronous base station business may with synchronous in neighbor cell broadcast simultaneously.Therefore, on two or more adjacent base stations this simultaneously transport service can generate large interference in the neighbor cell of losing synchronous base station.
Due to this interference, these neighbor cells show as asynchronous (out of synch).Control the Virtual network operator of base station and there is no instrument to determine which certain base station is lost synchronous, and because of reason for this reason, suffer only to be regarded as out-of-service by all neighbor cells of the interference of a base station generation.Therefore, the stability of whole transmission network and reliability become so not satisfactory.
Correspondingly, Virtual network operator can arrange the high request that will safeguard, so that the synchronous capacity not affecting whole communication network of base station.For global positioning system (GPS) synchronously, if gps signal is lost 24 hours in a base station, then corresponding time drift should remain in 1u so that the expectation reliability of maintaining network.May be difficult to after 24 hours realize without gps signal because this time drifts in, therefore, the base station of the configurable loss gps signal of operator is closed after 24 hours automatically.In practical situations both, the synchronous of expectation can be safeguarded in the base station of losing gps signal, and therefore the closedown of this base station is unnecessary.But the operator of network does not have and determines whether to lose the base station of GPS still just in the ability of maintain synchronization, and therefore, this base station has to be closed, and this is undesirable in the case.
In this regard, it should be noted that when submitting present patent application to, the operator of TD-SCDMA network disposed in China not have to measure in fact in real time and the synchronous mechanism of use base station and the remainder of network.Be also noted that, TD-SCDMA configuration is different from other 3G cellular technology, and therefore, based on other existing 3G technology, it is unconspicuous for revising existing 3G technology to reach TD-SCDMA configuration.
Sum up existing TD-SCDMA and configure relevant problem, notice, radio net does not have the capacity of the difference of injection time capacity of persistent surveillance neighbor cell, particularly when all these communities are in service.Therefore, when the synchronisation source in base stations such as such as gps signals is lost, by implementing strict (hold-over) time that delays on its synchronous base station of loss, other problem may be produced.In addition, even if actual conditions are after slack time, the difference of injection time between adjacent base station is allowed, but operation and maintenance (OAM) system configuration becomes to close dangerous base station to make network " safety ", and this is degrading this problem.Therefore, many permissible base stations may be forced closed, but this is dispensable.
In addition, cause when there are some hardware/software mistakes in certain base station base station lose its with the synchronous of network and operator or base station itself fail to find out timing error time, whole radio net can be influenced, and operator's possibly cannot head it off.
All these problems may exist in current TD-SCDMA radio network configuration.Correspondingly, the device of the problems referred to above and defect, system and method is avoided will to be desirable for TD-SCDMA communication network provides.
Summary of the invention
According to an example embodiment, there is a kind of when nonsynchronous with network method in the first base station for determining in communication network, described network comprises at least the second base station and is configured to receive the user terminal from the signal of the first and second base stations.The method comprises: in network-based control module, receive the measurement report of user terminal, wherein measurement report comprise the first signal from the first base station to user terminal first time of advent and from the second base station to second time of advent of the secondary signal of user terminal; Receive first propagation time of (i) first signal from the first base station to user terminal and (ii) from the second base station the maximum to the propagation time difference the second propagation time of the secondary signal of user terminal; The minimum value of the time started difference corresponding to time migration between time started of the first signal and the time started of secondary signal is defined as the difference of (i) first between the time of advent and second time of advent and the difference between (ii) maximum propagation time difference; The minimum differentiation time started relatively determined and predetermined threshold; And when the minimum differentiation time started determined in comparison step is greater than predetermined threshold, the first base station and the second base station lost a synchronous base station to being identified as to comprise.
According to another example embodiment, exist a kind of in communication network for determining when nonsynchronous with the network control module in the first base station in communication network, described network comprises at least the second base station and is configured to receive from the user terminal of the signal of the first and second base stations.Control module comprises: input interface, be configured to the measurement report receiving user terminal, wherein measurement report comprise the first signal from the first base station to user terminal first time of advent and from the second base station to second time of advent of the secondary signal of user terminal, and processor, be connected to input interface and be configured to receive first propagation time of (i) first signal from the first base station to user terminal and (ii) from the second base station the maximum to the propagation time difference the second propagation time of the secondary signal of user terminal, the minimum value of the time started of the time migration corresponded between time started of the first signal and the time started of secondary signal difference is defined as the difference of (i) first between the time of advent and second time of advent and the difference between (ii) maximum propagation time difference, the minimum differentiation time started relatively determined and predetermined threshold, and when the minimum differentiation time started determined is greater than predetermined threshold, first base station and the second base station lost a synchronous base station to being identified as to comprise.
According to another example embodiment still had, there is a kind of computer-readable media comprising computer executable instructions, wherein, described instruction is when being performed by the processor in the control module of communication network, impel the first base station in processor determination communication network when asynchronous with network, described network comprises at least the second base station and is configured to receive the user terminal from the signal of the first and second base stations.Described instruction comprises: in network-based control module, receive the measurement report of user terminal, wherein measurement report comprise the first signal from the first base station to user terminal first time of advent and from the second base station to second time of advent of the secondary signal of user terminal; Receive first propagation time of (i) first signal from the first base station to user terminal and (ii) from the second base station the maximum to the propagation time difference the second propagation time of the secondary signal of user terminal; The minimum value of the time started of the time migration corresponded between time started of the first signal and the time started of secondary signal difference is defined as the difference of (i) first between the time of advent and second time of advent and the difference between (ii) maximum propagation time difference; The minimum differentiation time started relatively determined and predetermined threshold; And the minimum differentiation time started determined in comparison step is when being greater than predetermined threshold, the first base station and the second base station lost a synchronous base station to being identified as to comprise.
Accompanying drawing explanation
In conjunction with in the description and the accompanying drawing forming its part illustrates one or more embodiment, and explain these embodiments together with the description.In the drawings:
Fig. 1 is the schematic diagram of subframe in TD-SCDMA communication network;
Fig. 2 is the schematic diagram of the TD-SCDMA communication network comprising at least two base stations and user terminal;
Fig. 3 is the schematic diagram comprising the TD-SCDMA communication network of at least two base stations and user terminal according to an example embodiment;
Fig. 4 is the flow chart according to an example embodiment, and it illustrates that by control module be the step that maintaining network synchronously performs;
Fig. 5 is the schematic diagram of control module or user terminal; And
Fig. 6 is the schematic diagram of a part for TD-SCDMA communication network.
Initialism list
TD-SCDMA-TD SDMA
3GPP-third generation partner program
TDD-time division duplex
FDD-Frequency Division Duplexing (FDD)
W-CDMA-Wideband Code Division Multiple Access (WCDMA)
TDMA-time division multiple access
SP-transition point
DT-downlink traffic
UT-uplink service
PCCPCH-Primary Common Control Physical Channel
GPS-universal locating system
OAM-operation and maintenance
UE-user terminal
BS-base station
CM-control module
MM-administration module
Embodiment
The following description of example embodiment is with reference to accompanying drawing.Same reference numeral in different graphic identifies same or similar key element.Below describe in detail and do not limit the present invention.On the contrary, scope of the present invention is defined by claim of enclosing.For simplicity's sake, the following examples are discussed relative to the term of above-mentioned TD-SCDMA system and structure.But the embodiment will discussed subsequently is not limited to this system, but may be used on other existing telecommunication system.
Spread all over the quote special characteristic, structure or the characteristic that refer to together with an embodiment describe of specification to " embodiment " or " embodiment " to comprise at least one embodiment of the present invention.Therefore, the phrase " in one embodiment " occurred in each position spreading all over specification or " in one embodiment " not necessarily all refer to identical embodiment.In addition, specific feature, structure or characteristic can combine in one or more embodiments in any suitable manner.
As shown in Figure 2, according to an example embodiment, general telecommunication system 20 can comprise multiple community C1 to C2 22, and each community has one or more base station BS 1 to BS2 24.In the exemplary embodiment, each community shows for only having a base station 24.But community can have more than one base station.User terminal UE 26 can be served by the base station BS 1 of community C1, but this user terminal still may can receive the signal from the BS2 in the C2 of neighbor cell.
Therefore, user terminal UE may can receive the first transmission signal TxBS1 from the first base station BS 1 and the second transmission signal TxBS2 from the second base station BS 2.Signal is in corresponding time T0 and T0 ' transmission.For desirable base station, these times are identical.But base station sends signal with little time difference, i.e. T0-T0 '.User terminal UE can know the expection delivery time of base station BS 1 and BS2 in advance.If the difference (the actual delivery time of base station can be different from the expection delivery time of base station) of actual delivery time T0 with T0 ' can be determined/be calculated to user terminal, then based on these real times, the synchronous of two base station BSs 1 and BS2 can be calculated.Such as, the operator comprising the network of community C1 and C2 knows the expection delivery time in advance, and can compare the actual delivery time of these expection delivery times and base station.Being based in part on this to observe, how following example embodiment will determine the synchronous of base station if disclosing.
Subsequently, the handover measurement in Brief Discussion TD-SCDMA system.Handover measurement relates to user terminal UE and how the control of the transmission to user terminal UE is switched to community C2 from community C1 to the movement of community C2 and community C1.For supporting to switch, baton handover particularly as the property feature of TD-SCDMA (is similar in relay race the process joining relay baton, baton handover is mainly based on the running fix ability that TD-SCDMA base station provides), the sustainable detection of user terminal UE is from the signal (can monitor PCCPCH channel to receive these signals in such as downlink traffic as shown in Figure 1) of Serving cell C1 and neighbor cell C2.Based on these Received signal strength, user terminal UE can measure the difference of injection time receiving PCCPCH channel.
3GPP standard determination user terminal UE answers several measurements in network enabled, such as sequential shifts to an earlier date (timing advance) (signal propagates into the base station time used from user terminal) etc., and all these measurements can based on the difference of injection time receiving PCCPCH channel.
The accuracy of measurement of the difference of injection time of neighbor cell measurement requires that (predetermined threshold) is desirable in +/-0.125 chip (+/-0.098us) left and right.The radio net algorithm of each network can be configured to require that these are measured when meeting some situation in the regular reporting carrying out user terminal UE or only.Therefore, according to an example embodiment, as next discussed, also be can be used for the difference of injection time detecting and calculate between adjacent base station for the user terminal measurement switched by network.
Shown in example embodiment as shown in Figure 3, the maximum propagation time difference (transmitting Tx to postpone) of two neighbor cell C1 and C2 can be defined as equaling T1-T2 in TD-SCDMA system during the network planning, wherein, T1 corresponds to transmission signal TxBS1 propagates into user terminal UE 26 propagation delay from base station BS 1 24, and T2 corresponds to transmission signal TxBS2 propagates into user UE 26 propagation delay from base station BS 224.Such as, by considering to be sent to the signal of BS2 to estimate the maximum propagation time difference from BS1.More particularly, maximum T1-T2 can be calculated as being arranged in the first community and preparing to be switched to the maximum delay of the second community or the multiple user terminals that vice versa.In other words, when calculating the maximum of T1-T2, the position of multiple user terminal in Zone switched is taken into account.In this regard, there are the various methods for determining maximum of T 1-T2, such as, all disclose name incorporated herein by reference at it and be called disclosed in the PCT/SE2007/050664 of XXX.Does [Roger please the title and author that provide this patent application? ] maximum delay propagation time difference can be depending on air environment between base station, such as, rural area or city medium, according to cell range etc.
Again with regard to Fig. 3, the time difference that user terminal UE 26 arrives measured by user terminal UE relative to transmission signal TxBS1 and TxBS2 equals Ta1-Ta2, wherein, Ta1 is the time of the transmission signal arrival user terminal UE from base station BS 1, and Ta2 is the time of advent of the corresponding transmission signal from base station BS 2.
Therefore,
Ta1-Ta2＝T0+T1-(T0’+T2)＝(T0-T0′)+(T1-T2)，(1)
Wherein, Measuring Time Ta1-Ta2 is or/and Ta1 and Ta2 of each measurement can be sent to network control from user terminal UE in measurement report.
Because the maximum propagation time difference max (T1-T2) of base station BS 1 and base station BS 2 can assess in network design, and because user terminal UE can measure poor Ta1-Ta2, therefore, the minimum value min (T0-T0 ') (sending the difference of the time started of PCCPCH signals from two base stations) of difference time started can be determined, as next discussed.It should be noted that following relation is set up: T0-T0 '=Ta1-Ta2 (the PCCPCH difference of injection time of reception)-(T1-T2) > (Ta1-Ta2)-max (T1-T2).Therefore, min (T0-T0 ')=(Ta1-Ta2)-max (T1-T2).
According to an example embodiment, postpone based on the minimum T0-T0 ' determined, the timing error in one or more base station can be classified as follows:
Situation 1: there is certain base station mistake, such as, GPS hardware module does not work, and fails correct time to be provided to base station.These mistakes thus base station detect.
Situation 2: there is certain base station mistake, and influenced base station fails oneself to find mistake; And
Situation 3: whole synchronisation source has fault, affects large stretch of coverage, this source can not be detected.
For situation 1, operator needs to know when close base station to avoid occurring undesirable large difference of injection time in system.Based on above-mentioned equation (1), based on the measurement received from user terminal UE in the default control module CM 28 of network, continue the minimum difference of injection time T0-T0 ' that (when such as, each user terminal experience switches) calculation base station is right.Control module CM also receives the similar measurement of other user terminal in automatic network can monitor all active base station.Once control module CM determines that the right minimum difference of injection time T0-T0 ' in any base station is larger than certain predetermined threshold (it can be relevant to operator), and based on the information received from influenced base station, control module CM just can the loss of administration module (MM) 30 relative synchronous of informing network operator, and administration module MM or control module CM forces influenced base station out-of-service to prevent the synchronization loss in other base station subsequently.
For situation 2, owing to suffering base station not to be noted these actual conditions of time delay, therefore, Virtual network operator must determine which base station just has difficulty, and this determines the information relied on unlike in situation 1 from influenced base station.In this regard, in situation 1, influenced base station can communicate with Virtual network operator, and notifies that administration module is about its identity and the mistake run into.As in last situation, Virtual network operator (it comprises control module 28 and administration module 30) monitors the minimum difference of injection time T0-T0 ' that base station is right.Monitor step required time to reduce, Virtual network operator only can monitor adjacent base station pair, and wherein, adjacent base station can define based on its adjacent geographically respective cell.
When Virtual network operator determines that a pair base station has the minimum difference of injection time T0-T0 ' larger than predetermined threshold and do not receive other data from corresponding base station, Virtual network operator must identify which base station in two base stations is being lost synchronously.Because any base station in network may have more than one adjacent base station, therefore, synchronization loss should manifest other base station centering comprising influenced base station.Therefore, Virtual network operator can monitor and lose adjacent base station, at least one right base station of synchronous base station with showing as.Identify represent lose another of synchronous sign to base station after, whether Virtual network operator checking exists common base station the base station centering representing synchronization loss.
According to an example embodiment, Virtual network operator can verify that common base station has same phase for each difference of injection time with adjacent base station, to identify that common base station is losing synchronous base station for certain.Subsequently, Virtual network operator checking sequential extent, that is, whether difference of injection time is greater than certain predetermined threshold, and based on this information, Virtual network operator determines whether to close influenced base station.The algorithm realizing the position for judging the base station by erroneous effects in a network can be relevant to operator, because various judgment rule can be used for determining which base station is just experiencing with losing loss.Such as, in an exemplary embodiment, if when matching with suspicious base station, at least two adjacent base stations affect by sequence problem, then Virtual network operator can judge that base station is subject to this problems affect.
Situation 3 is different from situation above, because in this case, each base station can have its oneself sequential.Therefore, according to an example embodiment, can select with reference to sequential based on the one or more existing base station of losing its synchronisation source.Once select with reference to sequential, Virtual network operator just can judge that situation of following 2 is to judge which other base station will be closed.Such as, crucial community can be appointed as in some community (they are considered to important) by Virtual network operator, and even when whole network loss synchronisation source, these communities can have the high priority in the service of remaining on.The sequential of important community is considered to reference to sequential, and based on all the other communities of said method be verified whether be in important community synchronous in.
According to an example embodiment in Fig. 4, exemplified with the step will followed for operational network as above.In the diagram, a kind of when nonsynchronous with network method in the first base station for determining in communication network is shown.Network can comprise at least the second base station and be configured to receive the user terminal from the signal of the first and second base stations.As shown in Figure 4, the method comprises the following steps: step 400, in network-based control module, receive the measurement report of user terminal, wherein measurement report comprise the first signal from the first base station to user terminal first time of advent and from the second base station to second time of advent of the secondary signal of user terminal; Step 402, receive first propagation time of (i) first signal from the first base station to user terminal and (ii) from the second base station the maximum to propagation time difference the second propagation time of the secondary signal of user terminal; Step 404, is defined as the difference of (i) first between the time of advent and second time of advent and the difference between (ii) maximum propagation time difference by the minimum value of the difference time started of the time migration corresponded between time started of the first signal and the time started of secondary signal; Step 406, compares the minimum differentiation time started and predetermined threshold determined; And step 408, when the minimum differentiation time started determined in comparison step is greater than predetermined threshold, the first base station and the second base station lost a synchronous base station to being identified as to comprise.
Some advantages that one or more embodiment disclosed in this will realize are discussed below.Virtual network operator now can by using the measurement of user terminal, and location generates the base station of timing error.Therefore, according to an embodiment, not from base station and/or the new demand of user terminal UE demand, and also not from the new demand of radio interface demand.Therefore, the realization of one or more embodiment will on Current standards without impact, and also on current base station and user terminal without impact.
Network can have the ability of the difference of injection time continuing detection (through user terminal) neighbor cell to locate mistake certain base station being existed to what kind, and measures to provide these without the need to revising network.In addition, even if this problem is not known in base station, network also can have the ability identifying fault base station (from synchronous angle).In addition, difference of injection time detects the normal work not interrupting base station.Therefore, base station can be used when radio net is in service.In addition, if certain base station loses its synchronisation source, then Virtual network operator can only difference of injection time drift for radio net not tolerable time just force this base station stop service, and be simply based on some slack time discussed in background technology part.
In order to the object illustrated instead of limit, an example of representative client terminal system according to the operation of example embodiment or control module shown in Fig. 5, can be performed.But, it should be understood that the principle of described example embodiment is equally applicable to standard networked systems.
Example user terminal equipment 500 can comprise the processing/control units 502 such as such as microprocessor, Reduced Instruction Set Computer (RISC) or other central processing module.Processing unit 502 without the need to being single assembly, and can comprise one or more processor.Such as, processing unit 502 can comprise primary processor with through coupling so that being associated from processor of carrying out communicating with primary processor.
Processing unit 502 indicated by the program available in program storage/memory 504, can control the basic function of mobile terminal.Therefore, processing unit 502 can perform the function as described in Fig. 2 to 4.More particularly, storage/memory 504 can comprise operating system for n-back test and application on mobile terminals and program module.Such as, program storage device can comprise one or more read-only memory (ROM), flash rom, able to programme and/or erasable ROM, random access memory (RAM), subscriber interface module (SIM), radio interface module (WIM), smart card or other removable memory device etc.Program module and associated features also can be sent to mobile terminal device 500 through data-signal, as electronically through web download such as such as internets.
One of program that can store in storage/memory 504 is specific program 506.Specific program 506 can the various assembly of indicating user terminal and adjacent base station alternately to perform the measurement as described in example embodiment.Program 506 and associated features can realize in by the exercisable software of processor 502 and/or firmware.Program storage/memory 504 also can be used for storing data 508, the various measurement performed as user terminal or with as described in other data of being associated of example embodiment.In an exemplary embodiment, program 506 and data 508 are stored in non-volatile electrically erasable ROM (EEPROM), flash rom etc., so that information can not be lost when power down (the power down) of user terminal 500.
Processor 502 is also coupled to user interface 510 element be associated with user terminal.The user interface 510 of user terminal can such as comprise display 512, keypad 514, loud speaker 516 and the microphones 518 such as such as liquid crystal display.As is known, these and other user's interface unit is coupled to processor 502.Keypad 514 can comprise and comprises dialing for performing and perform the alphanumeric key being assigned to the several functions such as the operation of one or more key.Alternative, other user interface mechanisms can be adopted, the graphical user interface of such as voice commands, switch, touch pad/screen, use pointing device, trace ball, joystick or other user interface mechanisms any.
Subscriber terminal equipment 500 also can comprise digital signal processor (DSP) 520.DSP 520 can perform several functions, comprises modulus (A/D) conversion, digital-to-analogue (D/A) conversion, audio coding/decoding, encrypt/decrypt, EDC error detection and correction, bit stream conversion, filtering etc.General couple can transmit and receive the radio signal be associated with wireless device to the transceiver 522 of antenna 524.
The representative illustration of user terminal of principle of the mobile computing device 500 of Fig. 5 as wherein applying described example embodiment is provided.From description provided herein, it will be understood by those skilled in the art that the present invention is applicable equally in other current known and movements in the future various and fixing computing environment.Such as, application-specific 506 and associated features and data 508 can store in various ways, can operate, and can operate in the mobile device with additional, less or different support circuit and user interface mechanisms on various processing unit.It should be noted that the principle of described example embodiment is equally applicable to immobile terminal, i.e. land-line (landline) computing system.
For providing the webserver or other system of calculating and management can be to process the calculation element with any type of transmission of information together with described example embodiment.Fig. 6 shows the example can carrying out the representative computing system of executable operations according to the server of example embodiment.Hardware, firmware, software or its combination can be used for performing various step as herein described and operation.The structure 600 of Fig. 6 is an example calculations structure that can use together with this type systematic.
Be applicable to performing Example Computing Device 600 movable described in example embodiment and can comprise control module or server 601.This type of server 601 also can be used as administration module, or administration module can have the structure identical with server 601.Server 601 can comprise the central processing unit (CPU) 602 being coupled to random access memory (RAM) 604 and read-only memory (ROM) 606.ROM 606 also can be the medium of other type stored program, such as programming ROM (PROM), erasable PROM (EPROM) etc.Processor 602 is connected (bussing) 610 and other inside and outside assembly by I/O (I/O) circuit 608 and carries out communicating providing control signal and like this with bus.It can be such as the input interface unit that the user terminal UE existed in the network of serving with equipment 600 carries out communicating that bus connects 610.Indicated by software and/or firmware instructions, processor 602 performs several functions, as known in the art.
Server 601 also can comprise one or more data storage device, comprises hard and floppy disk 612, CD-ROM drive 614 and can read and/or store other hardware of information, as DVD etc.In one embodiment, for perform above-mentioned steps software can CD-ROM616, dish 618 or can be portable store other form of information media on store and distribution.These mediums can be inserted in the such as device such as CD-ROM drive 614, disk drive 612 and to be read by it.Server 601 can be coupled to display 620, and display 620 can be the known display of any type or present screen, as LCD display, plasma display, cathode ray tube (CRT) etc.Provide user's input interface 622, comprise one or more user interface mechanisms such as such as mouse, keyboard, microphone, touch pads, touch-screen, voice recognition system.
Server 601 can be coupled to other calculation element through network, such as land-line and/or wireless terminal and associated application.Server can be the part as the more macroreticular configuration in such as internet 628 net such as Global Regional such as grade (GAN), and this allows finally to be connected to various land-line and/or mobile device.
Disclosed example embodiment provide for determine to transmit base station in network between user terminal, system, the method and computer program product of difference of injection time.Should be understood that this description is not intended to limit the present invention.On the contrary, that the example embodiment the spirit and scope of the present invention being intended to contain as claim definition of enclosing comprise is alternative, amendment and equivalent.In addition, in the detailed description of example embodiment, set forth many specific details to provide the detailed understanding of described invention.But, it will be apparent to one skilled in the art that when various embodiment can be put into practice without when this type of specific detail.
As those skilled in the art also by what understand, example embodiment can be embodied as method in radio communication device, communication network, or implements in computer program.Correspondingly, example embodiment can adopt the form of the embodiment of complete hardware embodiment or combination hardware and software aspect.In addition, example embodiment can adopt the form of the computer program that computer-readable storage medium stores, in described media, implement computer-readable instruction.Any suitable computer-readable media can be utilized, comprise hard disk, CD-ROM, digital versatile disc (DVD), light storage device or magnetic memory apparatus, as floppy disk or tape.Other non-limiting example of computer-readable media comprises memory or other known as memory device of flash type.
Although the characteristic sum key element of described example embodiment describes in the embodiment of particular combination, but each feature or key element can be used alone and without the further feature of embodiment and key element, or use in the various combinations of with or without further feature disclosed herein and key element.The method provided in the application or flow chart can the firmware of tangible enforcement in computer-readable storage medium, software, realize to be performed by all-purpose computer or processor in computer program.
Claims (23)
1. one kind for determining the first base station (24) (BS1) when nonsynchronous with the described network method in communication network, described network (20) comprises at least the second base station (BS2) and is configured to receive from described first and second base station (BS1, the user terminal (26) of signal BS2), described method comprises:
Receive the measurement report from described user terminal (26) in control module (28) in described network (20), wherein said measurement report comprises first time of advent (Ta1) from described first base station (BS1) to the first signal of described user terminal (26) and from described second base station (BS2) to second time of advent (Ta2) of the secondary signal of described user terminal (26);
Receive (i) from described first base station (BS1) to first propagation time (T1) of described first signal of described user terminal (26) and (ii) from described second base station (BS2) to the maximum propagation time difference (max (T1-T2)) second propagation time (T2) of the described secondary signal of described user terminal (26);
The minimum value (min (T0-T0')) of the difference time started of the time migration corresponded between the time started (T0) of described first signal and the time started (T0') of described secondary signal is defined as the difference between (i) described first time of advent (Ta1) and described second time of advent (Ta2) and the difference between (ii) described maximum propagation time difference (max (T1-T2));
The determined minimum differentiation time started (min (T0-T0')) is compared with predetermined threshold; And
When the minimum differentiation time started determined in described comparison step, (min (T0-T0')) was greater than described predetermined threshold, by described first base station (BS1) and described second base station (BS2) to being identified as the synchronous base station comprising and losing with described network.
2. the method for claim 1, also comprises:
Described control module receive from described first and second base stations with each base station about the relevant information of the self-identifying of synchronization loss.
3. method as claimed in claim 2, also comprises:
The result of the information relevant based on described self-identifying and described identification step, identifies and loses a described described base station synchronously; And
Determine whether to close and lose a described described base station synchronously.
4. the method for claim 1, also comprises:
When from described first and second base stations unavailable about the information that the self-identifying of synchronization loss is relevant with each base station, be comprise described first base station and three base station adjacent with described first base station to and comprise the step of the multiple claim 1 of counterweight of described second base station and four base station adjacent with described second base station.
5. method as claimed in claim 4, also comprises:
Identify the right of the base station of the described minimum differentiation time started had higher than described predetermined threshold; And
Determine described right common base station and described common base station be identified as to lose a described described base station synchronously.
6. method as claimed in claim 5, also comprises:
Close and lose a described described base station synchronously.
7. method as claimed in claim 4, also comprises:
Identify the right of the base station with the described minimum differentiation time started higher than described predetermined threshold and the corresponding stage of the described minimum differentiation time started with identical sign.
8. the method for claim 1, also comprises:
When from described first and second base stations unavailable about the information that the self-identifying of synchronization loss is relevant with each base station, or have have a more than one common base station higher than the base station centering calculated of the described minimum differentiation time started of described predetermined threshold time, select to be considered to safeguard described multiple base stations synchronously.
9. method as claimed in claim 8, also comprises:
By repeating the step of claim 1, determine, except selected multiple base stations, it is synchronously described whether other base station has lost.
10. the method for claim 1, also comprises:
Use determine described user terminal from the described measurement report of described user terminal adjacent base station between switching.
11. the method for claim 1, the step wherein receiving the described maximum propagation time difference also comprises:
Design only based on described network calculates the described maximum propagation time difference.
12. 1 kinds in communication network (20) for determine the first base station (BS1) in described communication network (20) when with described network (20) nonsynchronous control module (28), described network (20) comprises at least the second base station (BS2) and is configured to receive from described first and second base station (BS1, the user terminal (26) of signal BS2), described control module (28) comprising:
Input interface (610), be configured to receive from the measurement report of described user terminal (26), wherein said measurement report comprises first time of advent (Ta1) from described first base station (BS1) to the first signal of described user terminal (26) and from described second base station (BS2) to second time of advent (Ta2) of the secondary signal of described user terminal (26); And
Processor (602), is connected to described input interface (610) and is configured to
Receive (i) from described first base station (BS1) to first propagation time (T1) of described first signal of described user terminal (26) and (ii) from described second base station (BS2) to the maximum propagation time difference (max (T1-T2)) second propagation time (T2) of the described secondary signal of described user terminal (26);
The minimum value (min (T0-T0')) of the difference time started of the time migration corresponded between the time started (T0) of described first signal and the time started (T0') of described secondary signal is defined as the difference between (i) described first time of advent (Ta1) and described second time of advent (Ta2) and the difference between (ii) described maximum propagation time difference (max (T1-T2))
Determined minimum differentiation time started (min (T0-T0')) and predetermined threshold are compared, and
When the determined minimum differentiation time started, (min (T0-T0')) was greater than described predetermined threshold, described first base station (BS1) and described second base station (BS2) lost a described base station synchronously to being identified as to comprise.
13. control modules as claimed in claim 12, wherein said input interface be also configured to receive from described first and second base stations with each base station about the relevant information of the self-identifying of synchronization loss.
14. control modules as claimed in claim 13, wherein said processor is also configured to the result of the described step based on the relevant information of described self-identifying and identification, identify and lose a described described base station synchronously, and determine whether to close the described described base station synchronously of loss.
15. control modules as claimed in claim 12, wherein said processor is also configured to when from described first and second base stations unavailable about the information that the self-identifying of synchronization loss is relevant with each base station, be comprise described first base station and three base station adjacent with described first base station to and comprise the process of the multiple claim 12 of counterweight of described second base station and four base station adjacent with described second base station.
16. control modules as claimed in claim 15, wherein said processor is also configured to:
Identify the right of the base station of the described minimum differentiation time started had higher than described predetermined threshold; And
Determine these right common base station and described common base station be identified as to lose a described described base station synchronously.
17. control modules as claimed in claim 16, wherein said processor is also configured to:
Close and lose a described described base station synchronously.
18. control modules as claimed in claim 15, wherein said processor is also configured to:
Identify the right of the base station with the described minimum differentiation time started higher than described predetermined threshold and the corresponding stage of the described minimum differentiation time started with identical sign.
19. control modules as claimed in claim 12, wherein said processor is also configured to:
When from described first and second base stations unavailable about the information that the self-identifying of synchronization loss is relevant with each base station, or have higher than described predetermined threshold the described minimum differentiation time started calculate base station centering have a more than one common base station time, select to be considered to safeguard described multiple base stations synchronously.
20. control modules as claimed in claim 19, wherein said processor is also configured to:
By repeating the process of claim 12, determine, except selected multiple base stations, it is synchronously described whether other base station has lost.
21. control modules as claimed in claim 12, wherein said processor is also configured to:
Use determine described user terminal from the described measurement report of described user terminal adjacent base station between switching.
22. control modules as claimed in claim 12, the wherein said maximum propagation time difference only calculates based on the design of described network.
23. 1 kinds for determining the first base station (24) (BS1) when nonsynchronous with the described network device in communication network, described network (20) comprises at least the second base station (BS2) and is configured to receive from described first and second base station (BS1, the user terminal (26) of signal BS2), described device comprises:
For receiving the parts from the measurement report of described user terminal (26) in the control module (28) in described network (20), wherein said measurement report comprises first time of advent (Ta1) from described first base station (BS1) to the first signal of described user terminal (26) and from described second base station (BS2) to second time of advent (Ta2) of the secondary signal of described user terminal (26);
For receiving (i) from described first base station (BS1) to first propagation time (T1) of described first signal of described user terminal (26) and (ii) from described second base station (BS2) to the parts of the maximum propagation time difference (max (T1-T2)) second propagation time (T2) of the described secondary signal of described user terminal (26);
Minimum value (min (T0-T0')) for the difference time started by the time migration corresponded between the time started (T0) of described first signal and the time started (T0') of described secondary signal is defined as the parts of the difference between (i) described first time of advent (Ta1) and described second time of advent (Ta2) and the difference between (ii) described maximum propagation time difference (max (T1-T2));
For the parts that the determined minimum differentiation time started (min (T0-T0')) is compared with predetermined threshold; And
For when the minimum differentiation time started determined in described comparison step (min (T0-T0')) is greater than described predetermined threshold by described first base station (BS1) and described second base station (BS2) to being identified as the parts comprising and losing with a synchronous base station of described network.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SE2008/051132 WO2010041992A1 (en) | 2008-10-07 | 2008-10-07 | User terminal assisted out-of-synchronization detection |
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| CN102177666A CN102177666A (en) | 2011-09-07 |
| CN102177666B true CN102177666B (en) | 2015-06-03 |
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| CN200880131517.7A Expired - Fee Related CN102177666B (en) | 2008-10-07 | 2008-10-07 | User terminal assisted out-of-synchronization detection |
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| WO (1) | WO2010041992A1 (en) |
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| EP2561709A4 (en) * | 2010-04-22 | 2013-09-04 | Nokia Corp | Open/closed loop synchronization for radio transmitters |
| CN102387515B (en) * | 2010-09-01 | 2014-05-07 | 鼎桥通信技术有限公司 | Base station step-out defecting method and base station system |
| CN103517286B (en) * | 2012-06-14 | 2017-02-01 | 华为技术有限公司 | Method for determining clock asynchronization and device thereof |
| CN105472633B (en) * | 2014-05-29 | 2020-12-29 | 索尼公司 | Electronic device and method for inter-cell synchronization detection for time division duplex wireless communications |
| US20190364520A1 (en) * | 2016-09-30 | 2019-11-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Adapting between synchronous and asynchronous operations based on numerology |
| US10251139B2 (en) * | 2017-05-31 | 2019-04-02 | Nokia Technologies Oy | Active user selection in massive MIMO |
| CN114114325B (en) * | 2021-04-22 | 2022-07-22 | 中国电信股份有限公司 | Calibration method, device and system |
| CN113329094B (en) * | 2021-06-10 | 2022-07-08 | 中国联合网络通信集团有限公司 | Information push time determining method, device, equipment, medium and product |
| WO2023010545A1 (en) * | 2021-08-06 | 2023-02-09 | Oppo广东移动通信有限公司 | Communication method and communication apparatus |
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| US5872774A (en) * | 1997-09-19 | 1999-02-16 | Qualcomm Incorporated | Mobile station assisted timing synchronization in a CDMA communication system |
| CN101253703A (en) * | 2005-06-24 | 2008-08-27 | 朗迅科技公司 | Method for accomodating timing drift between base stations in a wireless communications system |
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- 2008-10-07 WO PCT/SE2008/051132 patent/WO2010041992A1/en active Application Filing
- 2008-10-07 CN CN200880131517.7A patent/CN102177666B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5872774A (en) * | 1997-09-19 | 1999-02-16 | Qualcomm Incorporated | Mobile station assisted timing synchronization in a CDMA communication system |
| CN101253703A (en) * | 2005-06-24 | 2008-08-27 | 朗迅科技公司 | Method for accomodating timing drift between base stations in a wireless communications system |
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| CN102177666A (en) | 2011-09-07 |
| WO2010041992A1 (en) | 2010-04-15 |
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