CN105848278A - Method for processing multi-terminal uplink asynchronization of third-party instrument in monitoring LTE-A system - Google Patents
Method for processing multi-terminal uplink asynchronization of third-party instrument in monitoring LTE-A system Download PDFInfo
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- CN105848278A CN105848278A CN201610452087.5A CN201610452087A CN105848278A CN 105848278 A CN105848278 A CN 105848278A CN 201610452087 A CN201610452087 A CN 201610452087A CN 105848278 A CN105848278 A CN 105848278A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
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Abstract
The invention provides a method for processing multi-terminal uplink asynchronization of a third-party instrument in monitoring an LTE-A system, and relates to the technical field of mobile communication. As for the problem of uplink asynchronization of the multiple terminals of the LTE-A system and the third-party instrument, the uplink frame synchronization time adjustment amount of each terminal and a base station and the third-party instrument is measured by utilizing the random access procedure firstly, and each terminal adjusts the transmitting boundary of the uplink frames according to the uplink frame synchronization time adjustment amount indicated by the base station. Then the third-party instrument acquires the uplink frame synchronization time adjustment amount of each terminal and the base station, acquires the timing relationship of each terminal and the instrument through comparison with the measured adjustment amount value and receives the complete uplink subframes of all the terminals by utilizing the timing relationship. Finally the third-party instrument extracts data according to the timing relationship of each terminal and the instrument and independently analyzes the uplink data transmitted by each terminal. The problem of uplink asynchronization of the multiple terminals and the third-party instrument can be effectively solved.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to third party's instrumentation and monitoring LTE-A system
Multiple terminals and third party's instrument up nonsynchronous problem how is solved the when of system multiple terminals.
Background technology
LTE-A (Long Term Evolution-Advanced, enhancement mode Long Term Evolution) is as LTE (Long
Term Evolution, Long Term Evolution) smooth evolution, not only maintain the highest compatibility with LTE, also
Hardware circuit solution is proposed requirements at the higher level, the most descending 1Gbit/s and the peak-peak of up 500Mbit/s
Speed.Uplink/downlink antenna configuration maximum supports 8 × 8, and up maximum support 4 × 4, the systematic parameter of LTE-A is relatively
LTE is greatly improved.Lte-a system requires to provide bigger power system capacity and lower time to prolong
Late.
In lte-a system, it is desirable to the frame boundaries of the uplink signal of all terminals arrives base station reception
That the frame boundaries with down link signal aligns the when of end, be the most just avoided that base station receives normal time
Information after the information carved postpones with experience overlaps the interference caused.And due between multiple terminals and base station
Distance is different, say, that the uplink signal of each terminal arrives the airborne spread distance of base station
Being not quite similar, the frame boundaries of the uplink signal which results in each terminal arrives base station and receives
When cannot align, in order to solve this problem, lte-a system have employed uplink synchronous technology.
TA (Timing Advance, Timing Advance) is introduced in order to indicate end during uplink synchronous
The time that end needs in advance or postpones when sending uplink signal, terminal according to TA to sending upward signal
Time is adjusted.If TA is more than 0, illustrates terminal to need the time sending upward signal and carry out in advance,
Otherwise, then explanation terminal needs to postpone the time sending upward signal.So that the frame boundaries of terminal signaling
It is alignment when of arriving base station, reaches uplink synchronous.
Uplink synchronous technology is mainly completed by Stochastic accessing, and Stochastic accessing synchronizing process mainly completes
The transmission of random access guiding and reception；The calculating of Timing Advance；The transmission of accidental access response and reception.
It is described in detail below: terminal passes through PRACH (Physical Random Access Channel, physical accidental
Access channel) ask to access, before this is detected in base station to base station one random access leader sequence of transmission
Lead sequence and estimate the Timing Advance of itself and terminal room with this, and being informed by accidental access response order
Terminal Timing Advance, terminal adjusts the uplink signal transmission time according to receiving TA value, reaches up
Synchronize.
China is just at all-round construction TD-LTE network at present, and LTE-A eats dishes without rice or wine, and support LTE-A is empty for measuring instrument
The protocol stack monitoring of mouth L1, L2, L3 and cross-layer association analysis, take real-time tracking mode to monitor multiple terminals
Business foundation, signaling procedure and data traffic, analysing terminal business conduct and network problem.LTE-A eats dishes without rice or wine
Measuring instrument will construction follow-up to China and optimize TD-LTE-A network have great importance.
Base station and terminal are monitored by third party's instrument simultaneously, owing to terminal is TA pair according to base station instruction
The delivery time of upward signal is timed adjustment, and the frame boundaries of the upward signal of such different terminals arrives
It is alignment during the receiving terminal of base station, and generally the Timing Advance of different terminals differs, again
Owing to the airborne spread distance of terminal to third party's instrumentation and the airborne spread of terminal to base station are apart from often
Also differ, so may result in the uplink frame that multiple terminals maintains uplink synchronous to need according to itself and base station
The frame boundaries of the upward signal that synchronization timing lead adjusts can not align, also when arriving third party's instrumentation
That is each terminal meet with cannot realize while the uplink synchronous of base station synchronization with third party's instrument.
Summary of the invention
Present invention seek to address that above the deficiencies in the prior art.Propose and a kind of effective solve multiple terminals and the
The method of the up asynchronous problem of tripartite's instrument.Technical scheme is as follows:
Third party's instrument processes the up nonsynchronous method in multiple terminals, including following step when monitoring lte-a system
Rapid:
101, multiple terminals send random access guiding respectively to base station, and third party's instrument is monitored simultaneously；
102, after base station receives each terminal random access guiding, measure each terminal respectively and maintain with base station
The uplink frame adjustment amount lock in time TA that uplink synchronous needsi, base station sends to each terminal respectively and comprises base station
Lock in time adjustment amount TAiAccidental access response；
Third party's instrument listens to many terminals of step 101 and issues the random access guiding of base station, and surveys respectively
Measure the uplink frame adjustment amount lock in time TA that each terminal maintains uplink synchronous to need with this third party's instrumenti′；
103, each terminal obtains and maintains the uplink frame adjustment lock in time timing of uplink synchronous needs to carry with base station
Front amount TAiAfter, according to TAiAdjust the transmission time boundary of uplink frame, send upward signal to base station；
Third party's instrument monitors the accidental access response message that base station sends in step 102, and obtain terminal with
Base station maintains the uplink frame adjustment amount lock in time TA that uplink synchronous needsi；
104, third party's instrument listens to, by contrast, the TA that base station sendsiThe TA measured with step 102i',
Obtain terminal and adjust after the uplink frame transmission time timing relationship with this instrument, according to the timing feelings of different terminals
Condition receives the complete sub-frame information of all terminals, and i-th terminal represents with the Timing Advance of this third party's instrument
For Δ TAi=TAi-TAi', wherein i=1,2 ..., n, n represent the service terminal quantity of current base station；
105, third party's instrument is respectively according to upward signal and the timing adjustment amount Δ TA of this instrument of each terminali
Extract data, the upstream data that each terminal of independent parsing sends.
Further, when system have new terminal access or be currently accessed terminal terminate connect time, third party
Instrument can adjust Δ TA in timeminWith Δ TAmax, Δ TAminRepresent minimum timing adjustment amount, Δ TAmaxRepresent that maximum is fixed
Time adjustment amount, and receive the length of buffer area buffer, and can independent parsing terminal quantity change after each
The upstream data that individual terminal sends.
Further, step 104 specifically includes following steps:
(1) third party's instrument receives, by contrast, the TA that base station sendsiWith the TA measuredi', it is thus achieved that terminal is adjusted
With the timing relationship of this instrument after the whole uplink frame transmission time, the timing advance scale of i-th terminal and this instrument
It is shown as Δ TAi=TAi-TAi', wherein i=1,2 ..., n, n represent the service terminal quantity of current base station；
(2) third party's instrument is according to the minimum timing adjustment amount Δ TA of each terminalmin=min (Δ TAi, i=1,2 ..., n) adjust
Whole upward signal receives frame synchronization point, and the opening space of uplink frame data receiver buffer area buffer is
Tf'=Tf+ΔTAmax-ΔTAminIndividual memory element, each memory element deposits one sampled point of upward signal, its
Middle Δ TAmax=max (Δ TAi, i=1,2 ..., n) represent Δ TAiIn maximum, Tf=30720 represent adopting of a subframe
Sample number；
(3) as | Δ TAmax-ΔTAmin|≥TCPTime, wherein TCPRepresent the sampling number of Cyclic Prefix, third party's instrument
Table needs to move physical location near direction, base station；
(4) third party's instrument is when receiving a sub-frame of uplink, will receive the last Δ TA in buffermax-ΔTAmin
Individual sampled point copies to buffer foremost, then according to the sub-frame synchronization point after Tiao Zhenging receives Tf=30720 points
Upward signal sampled data, is stored in the rear T receiving bufferfIn individual memory space.
Further, the upstream data that each terminal of step 105 independent parsing sends specifically includes (to receive jth
As a example by individual terminal data):
(1) extract in reception buffer from Δ TAmax-ΔTAjTo Δ TAmax-ΔTAj+TfThe subframe of-1 memory element
Data；
(2) according to up channel decoding algorithm, the upstream data of jth terminal is decoded.
Further, when there being new terminal to access, third party's instrument processes and is currently accessed terminal and new terminal
Upstream data specifically includes:
(1) new terminal sends random access guiding to base station, and base station receives random access guiding and measurement makes new advances end
End maintains the uplink frame adjustment amount lock in time TA that uplink synchronous needs, and third party's instrument is while listening for new terminal
It is sent to the random access guiding of base station, and measures new terminal and the 3rd instrument maintenance uplink synchronous need
The uplink frame adjustment amount lock in time TA ' wanted；
(2) base station sends the accidental access response carrying its corresponding time adjustment amount, new terminal to new terminal
Access response according to network identity identification is corresponding and obtains uplink frame adjustment amount lock in time TA, the 3rd
Fang Yibiao monitors base station according to network identity simultaneously and is sent to the accidental access response of new terminal, and obtains new whole
End and the uplink frame adjustment amount lock in time TA of base station；
(3) new terminal adjusts the transmission time boundary of uplink frame according to uplink frame adjustment amount lock in time TA, sends
Upward signal, now third party's instrument needs the timing cases according to being currently accessed terminal and new terminal to receive institute
There is the complete sub-frame information of terminal；
(4) being currently accessed number of terminals n and be updated to n+1, the upstream data sending wherein certain terminal is translated
Code.
Further, described step (3) third party's instrument needs according to the timing being currently accessed terminal and new terminal
Situation receive all terminals complete sub-frame information particularly as follows:
A. third party's instrument receives the TA that base station sends and the TA ' measured by contrast, it is possible to obtain newly eventually
End adjusts the timing relationship after the uplink frame transmission time with this instrument, the Timing Advance of new terminal and this instrument
It is expressed as Δ TA=TA-TA '；
B. Δ TA is updatedmaxWith Δ TAminValue: if Δ TAmax＜ Δ TA, then Δ TAmaxIt is updated to Δ TA, otherwise Δ TAmax
Constant；If Δ TAmin＞ Δ TA, then Δ TAminIt is updated to Δ TA, otherwise Δ TAminConstant.
Further, when be currently accessed terminal k ∈ (1,2 ..., when n) terminating to connect, third party's instrument processes surplus
Remaining access terminal receives upstream data and specifically includes:
(1) Δ TA is updatedmaxWith Δ TAminValue: Δ TAmaxIt is updated to Δ TAmax=max (Δ TAi, i=1,2 ..., n and i ≠ k)；
ΔTAminIt is updated to Δ TAmin=min (Δ TAi, i=1,2 ..., n and i ≠ k)；
(2) it is currently accessed number of terminals n and is updated to n-1.
Advantages of the present invention and having the beneficial effect that:
The present invention utilizes third party's instrument and base station and the relation of terminal, it is possible to effective solution third party's instrument
Multiple terminal uplink under Jian Tinging and the nonsynchronous problem of third party's instrument, and third party's instrument can be along with
The change of terminal quantity adjusts dynamically, to realize the terminal uplink stationary problem of varying number.And
The present invention is dynamically received buffer and receives the asynchronous upward signal of multiple terminals by design, it is not necessary to be to system
Making extra amendment, computation complexity is relatively low.
Accompanying drawing explanation
Fig. 1 is third party's instrument and base station and the relation schematic diagram of terminal
Fig. 2 is that in the present invention, third party's instrument solves the up nonsynchronous overview flow chart in multiple terminals
Fig. 3 is that in the present invention, third party's instrument receives buffer and multiple terminals and this instrument timing relationship schematic diagram
Detailed description of the invention
The present invention is according to third party's instrument and base station and the relation of terminal, as it is shown in figure 1, solve third party's instrument
Table is multiple terminal uplink and the nonsynchronous problem of third party's instrument in monitoring base station and terminal procedures.Hereinafter tie
Close accompanying drawing and the enforcement of the present invention is described specifically by instantiation.Fig. 2 is that third party's instrument monitors LTE-A
The up nonsynchronous overview flow chart in multiple terminals is solved during system.
1., as a example by two terminals, two terminals send random access guiding respectively by PRACH to base station,
Base station receives random access guiding and measures the uplink frame of the two terminal maintenance uplink synchronous needs respectively together
Step time adjustment amount TAi, wherein i=1,2.
2. third party's instrument is sent to the random access guiding of base station while listening in step 1 two terminals, and surveys
Measure the uplink frame adjustment amount lock in time TA that two terminals maintain uplink synchronous to need with this third party's instrumenti',
Wherein i=1,2.
3. base station rings to two independently transmitted Stochastic accessing carrying its corresponding time adjustment amount of terminal respectively
Should, two terminals respond and obtain uplink frame synchronization according to different corresponding accesses of network identity identification
Time adjustment amount TAi, wherein i=1,2.
4. third party's instrument is monitored base station in step 3 according to different network identity identification simultaneously and is sent to two
The accidental access response of terminal, obtains the uplink frame adjustment amount lock in time TA of two terminals and base stationi, wherein
I=1,2.
5. two terminals are according to uplink frame adjustment amount lock in time TAiAdjust the transmission time boundary of uplink frame, send out
Send upward signal.
6. inconsistent due to the usual geographical position in third party's instrument and base station, therefore two terminals are being satisfied with base
Cannot realize synchronization with third party's instrument while uplink synchronous of standing, third party's instrument needed according to two ends
The timing cases of end receives the complete sub-frame information of all terminals, as shown in Figure 3.Specific as follows:
(1) third party's instrument listens to, by contrast, the TA that base station sendsiThe TA measured with second stepi', permissible
Obtaining terminal and adjust after the uplink frame transmission time timing relationship with this instrument, i-th terminal is determined with this instrument
Time lead chart be shown as Δ TAi=TAi-TAi', wherein i=1,2.
(2) Δ TA might as well be set1＞ Δ TA2, third party's instrument is according to the minimum timing adjustment amount Δ TA of two terminals2Adjust
Whole upward signal receives frame synchronization point, as Δ TA2During ＜ 0, third party's instrument is postponed and is received the initial of upward signal
Time；As Δ TA2During ＞ 0, third party's instrument receives the initial time of upward signal in advance.In order to receive
There are the complete sub-frame of uplink being currently accessed terminal, opening up of uplink frame data receiver buffer (buffer area)
Space is Tf'=Tf+ΔTA1-ΔTA2Individual memory element, each memory element deposits one sampled point of upward signal,
Wherein Tf=30720 hits representing a subframe.
(3) as | Δ TA1-ΔTA2| ＞ TCPTime, wherein TCPRepresenting the sampling number of Cyclic Prefix, third party's instrument needs
Physical location is moved near direction, base station.
(4) third party's instrument is when receiving a sub-frame of uplink, will receive the last Δ TA in buffer1-ΔTA2Individual
Sampled point copies to buffer foremost, then according to the sub-frame synchronization point after the 6th (2) successive step receives
Tf=30720 upward signal sampled datas, are stored in the rear T receiving bufferfIn individual memory space.Such as Fig. 3
Shown in.
7., based on the reception data received in buffer in the 6th step, third party's instrument is respectively according to two terminals
The timing adjustment amount Δ TA of upward signal and this instrumentiExtracting data, each terminal of independent parsing (only comprises and works as
Front subframe is assigned with the terminal of ascending resource, and number of terminals is set to m, and m≤2) upstream data that sends, right
The upstream data decoding that wherein certain terminal i=1,2 sends specifically includes:
(1) Δ TA in reception buffer is extracted1-ΔTAiTo Δ TA1-ΔTAi+TfThe sub-frame data of-1 memory element.
(2) according to existing up channel decoding algorithm, the upstream data of i-th terminal is decoded.
8., when there being new terminal to access, third party's instrument processes the upper line number being currently accessed terminal and new terminal
According to specifically including:
(1) new terminal sends random access guiding to base station, and base station receives random access guiding and measurement makes new advances end
End maintains the uplink frame adjustment amount lock in time TA needed with base station uplink synchronous3.Third party's instrument while listening for
The random access guiding that new terminal sends, and measure new terminal and the 3rd instrument maintenance uplink synchronous need
The uplink frame adjustment amount lock in time TA wanted3′。
(2) base station sends the accidental access response carrying its corresponding time adjustment amount, new terminal to new terminal
Access response according to network identity identification is corresponding and obtains uplink frame adjustment amount lock in time TA3.3rd
Fang Yibiao monitors base station according to network identity simultaneously and is sent to the accidental access response of new terminal, and obtains new whole
End and the uplink frame adjustment amount lock in time TA of base station3。
(3) new terminal is according to uplink frame adjustment amount lock in time TA3Adjust the transmission time boundary of uplink frame, send
Upward signal.Now third party's instrument needs the timing cases according to being currently accessed terminal and new terminal to receive institute
There is the complete sub-frame information of terminal.Specific as follows:
Third party's instrument receives, by contrast, the TA that base station sends3With the TA measured in step 8 (1)3',
New terminal can be obtained and adjust after the uplink frame transmission time timing relationship with this instrument, new terminal and this instrument
Timing Advance be expressed as Δ TA3=TA3-TA3′。
If A. Δ TA2＞ Δ TA3, then third party's instrument is according to Δ TA3Adjust upward signal frame synchronization point, up
Frame data receive the opening space of buffer and are updated to Tf'=Tf+ΔTA1-ΔTA3.When | Δ TA1-ΔTA3| ＞ TCPTime,
Third party's instrument needs to move physical location near direction, base station.Third party's instrument is receiving a up son
During frame, the last Δ TA in buffer will be received1-ΔTA3Individual sampled point copies to buffer foremost, then presses
According to the sub-frame synchronization point Δ TA after adjusting3Receive Tf=30720 upward signal sampled datas, are stored in reception buffer
Rear TfIn individual memory space.
If B. Δ TA1＜ Δ TA3, then third party's instrument upward signal frame synchronization point is constant, uplink frame data receiver
The opening space of buffer is updated to Tf'=Tf+ΔTA3-ΔTA2.When | Δ TA3-ΔTA2| ＞ TCPTime, third party's instrument
Need to move physical location near direction, base station.Third party's instrument, when receiving a sub-frame of uplink, will connect
Receive the last Δ TA in buffer3-ΔTA2Individual sampled point copies to buffer foremost, then according to synchronizing sub-frame
Point Δ TA2Receive Tf=30720 upward signal sampled datas, are stored in the rear T receiving bufferfIndividual memory space
In.
If C. Δ TA2＜ Δ TA3＜ Δ TA1, then third party's upward signal frame synchronization point and uplink frame data receiver
The opening space of buffer is the most constant.Perform step 6 (3) and 6 (4).
(4) it is currently accessed number of terminals 2 and is updated to 3.Third party's instrument is respectively according to the upward signal of three terminals
Timing adjustment amount Δ TA with this instrumentiExtracting data, each terminal of independent parsing (only comprises present sub-frame distribution
The terminal of ascending resource, number of terminals is set to m, and m≤3) upstream data that sends, to wherein certain is eventually
The upstream data decoding that end j=1,2,3 sends specifically includes:
If A. Δ TA1＜ Δ TA3, extract and receive in buffer from Δ TA3-ΔTAjTo Δ TA3-ΔTAj+Tf-1 deposits
The sub-frame data of storage unit.Perform step 7 (2).
If B. Δ TA2＞ Δ TA3Or Δ TA2＜ Δ TA3＜ Δ TA1, perform step 7 (1) and 7 (2).
9., when there being terminal k ∈ (1,2,3) to terminate to connect, third party's instrument processes residue and is currently accessed the up of terminal
Data specifically include:
(1) third party's instrument determines the Timing Advance Δ TA terminating terminal k with this instrumentk∈ΔTAi, wherein
I=1,2,3.
(2) present Δ TA might as well be set2＜ Δ TA3＜ Δ TA1.The most current third party's instrument is according to Δ TA2Adjust upward signal
Frame synchronization point, the opening space of uplink frame data receiver buffer is Tf'=Tf+ΔTA1-ΔTA2。
If A. Δ TAk=Δ TA1, then third party's instrument upward signal frame synchronization point is constant, and uplink frame data connect
The opening space receiving buffer is updated to Tf'=Tf+ΔTA3-ΔTA2.Third party's instrument is receiving a up son
During frame, the last Δ TA in buffer will be received3-ΔTA2Individual sampled point copies to buffer foremost, then presses
According to sub-frame synchronization point Δ TA2Receive Tf=30720 upward signal sampled datas, are stored in the rear T receiving bufferfIndividual
In memory space.
If B. Δ TAk=Δ TA2, then third party's instrument is according to Δ TA3Adjust upward signal frame synchronization point, up
Frame data receive the opening space of buffer and are updated to Tf'=Tf+ΔTA1-ΔTA3.Third party's instrument is receiving one
During individual sub-frame of uplink, the last Δ TA in buffer will be received1-ΔTA3Individual sampled point copies to buffer foremost,
Then according to sub-frame synchronization point Δ TA3Receive Tf=30720 upward signal sampled datas, are stored in reception buffer
Rear TfIn individual memory space.
If C. Δ TAk=Δ TA3, then third party's instrument upward signal frame synchronization point and uplink frame data receiver
The opening space of buffer is the most constant, performs step 6 (3) and 6 (4).
(3) it is currently accessed number of terminals 3 and is updated to 2.Third party's instrument is respectively according to two of current residual access
The upward signal of terminal and the timing adjustment amount Δ TA of this instrumentiExtracting data, each terminal of independent parsing (is only wrapped
Be assigned with the terminal of ascending resource containing present sub-frame, number of terminals is set to m, and m≤2) upstream data that sends,
The upstream data decoding sending wherein certain terminal j=1,2 specifically includes:
If A. Δ TAk=Δ TA1, extract and receive in buffer from Δ TA3-ΔTAjTo Δ TA3-ΔTAj+Tf-1 deposits
The sub-frame data of storage unit.Perform step 7 (2).
If B. Δ TAk=Δ TA2Or Δ TAk=Δ TA3, perform step 7 (1) and 7 (2).
The above embodiment is interpreted as being merely to illustrate the present invention rather than limiting the protection model of the present invention
Enclose.After having read the content of record of the present invention, technical staff the present invention can be made various change or
Amendment, these equivalence changes and modification fall into the scope of the claims in the present invention equally.
Claims (7)
1. third party's instrument processes the up nonsynchronous method in multiple terminals when monitoring lte-a system, and its feature exists
In, comprise the following steps:
101, multiple terminals send random access guiding to base station, and third party's instrument is monitored simultaneously；
102, after base station receives each terminal random access guiding, measure each terminal respectively and maintain with base station
Row synchronizes the uplink frame adjustment amount lock in time TA neededi, base station sends to each terminal and comprises the base station synchronization time
Adjustment amount TAiAccidental access response；
Third party's instrument listens to many terminals of step 101 and issues the random access guiding of base station, and surveys respectively
Measure the uplink frame adjustment amount lock in time TA ' that each terminal maintains uplink synchronous to need with this third party's instrumenti；
103, each terminal obtains the uplink frame maintaining uplink synchronous to need with base station and adjusts timing lock in time
Lead TAiAfter, according to TAiAdjust the transmission time boundary of uplink frame, send upward signal to base station；
Third party's instrument monitors the accidental access response message that base station sends in step 102, and obtain terminal with
Base station maintains the uplink frame adjustment amount lock in time TA that uplink synchronous needsi；
104, third party's instrument receives, by contrast, the TA that base station sendsiThe TA ' measured with step 102i,
Obtain terminal and adjust after the uplink frame transmission time timing relationship with this instrument, according to the timing feelings of different terminals
Condition receives the complete sub-frame information of all terminals, and i-th terminal represents with the Timing Advance of this third party's instrument
For Δ TAi=TAi-TA′i, wherein i=1,2 ..., n, n represent the service terminal quantity of current base station；
105, third party's instrument is respectively according to upward signal and the timing adjustment amount Δ TA of this instrument of each terminali
Extract data, the upstream data that each terminal of independent parsing sends.
It is up not that third party's instrument the most according to claim 1 processes multiple terminals when monitoring lte-a system
The method synchronized, it is characterised in that terminate to connect when system has new terminal to access or is currently accessed terminal
Time, third party's instrument can adjust Δ TA in timeminWith Δ TAmax, Δ TAminRepresent minimum timing adjustment amount, Δ TAmaxTable
Show maximum timing adjustment amount, and the length of uplink frame data receiver buffer area buffer, and can independently solve
The upstream data that after analysis terminal quantity change, each terminal sends.
It is up not that third party's instrument the most according to claim 1 processes multiple terminals when monitoring lte-a system
The method synchronized, it is characterised in that step 104 specifically includes following steps:
(1) third party's instrument receives, by contrast, the TA that base station sendsiWith the TA ' measuredi, it is thus achieved that terminal is adjusted
With the timing relationship of this instrument after the whole uplink frame transmission time, the timing advance scale of i-th terminal and this instrument
It is shown as Δ TAi=TAi-TA′i, wherein i=1,2 ..., n, n represent the service terminal quantity of current base station；
(2) third party's instrument is according to the minimum timing adjustment amount Δ TA of each terminalmin=min (Δ TAi, i=1,2 ..., n) adjust
Whole upward signal receives frame synchronization point, and the opening space of uplink frame data receiver buffer area buffer is
T′f=Tf+ΔTAmax-ΔTAminIndividual memory element, each memory element deposits one sampled point of upward signal, its
Middle Δ TAmax=max (Δ TAi, i=1,2 ..., n) represent Δ TAiIn maximum, Tf=30720 represent adopting of a subframe
Sample number；
(3) as | Δ TAmax-ΔTAmin|≥TCPTime, wherein TCPRepresent the sampling number of Cyclic Prefix, third party's instrument
Table needs to move physical location near direction, base station；
(4) third party's instrument is when receiving a sub-frame of uplink, will receive the last Δ TA in buffermax-ΔTAmin
Individual sampled point copies to buffer foremost, then according to the sub-frame synchronization point after Tiao Zhenging receives Tf=30720 points
Upward signal sampled data, is stored in the rear T receiving bufferfIn individual memory space.
It is up not that third party's instrument the most according to claim 3 processes multiple terminals when monitoring lte-a system
The method synchronized, it is characterised in that the upstream data that each terminal of step 105 independent parsing sends specifically includes,
When receiving jth terminal data:
(1) extract in reception buffer from Δ TAmax-ΔTAjTo Δ TAmax-ΔTAj+TfThe subframe of-1 memory element
Data；
(2) according to up channel decoding algorithm, the upstream data of jth terminal is decoded.
It is up not that third party's instrument the most according to claim 2 processes multiple terminals when monitoring lte-a system
The method synchronized, it is characterised in that when there being new terminal to access, third party's instrument processes and is currently accessed terminal
Specifically include with the upstream data of new terminal:
(1) new terminal sends random access guiding to base station, and base station receives random access guiding and measurement makes new advances end
End maintains the uplink frame adjustment amount lock in time TA that uplink synchronous needs, and third party's instrument is while listening for new terminal
It is sent to the random access guiding of base station, and measures new terminal and the 3rd instrument maintenance uplink synchronous need
The uplink frame adjustment amount lock in time TA ' wanted；
(2) base station sends the accidental access response carrying its corresponding time adjustment amount, new terminal to new terminal
Access response according to network identity identification is corresponding and obtains uplink frame adjustment amount lock in time TA, the 3rd
Fang Yibiao monitors base station according to network identity simultaneously and is sent to the accidental access response of new terminal, and obtains new whole
End and the uplink frame adjustment amount lock in time TA of base station；
(3) new terminal adjusts the transmission time boundary of uplink frame according to uplink frame adjustment amount lock in time TA, sends
Upward signal, now third party's instrument needs the timing cases according to being currently accessed terminal and new terminal to receive institute
There is the complete sub-frame information of terminal；
(4) being currently accessed number of terminals n and be updated to n+1, the upstream data sending wherein certain terminal is translated
Code.
It is up not that third party's instrument the most according to claim 5 processes multiple terminals when monitoring lte-a system
The method synchronized, it is characterised in that described step (3) third party's instrument needs according to being currently accessed terminal with new
The timing cases of terminal receive all terminals complete sub-frame information particularly as follows:
A. third party's instrument listens to the TA that base station sends and the TA ' measured by contrast, it is possible to obtain newly eventually
End adjusts the timing relationship after the uplink frame transmission time with this instrument, the Timing Advance of new terminal and this instrument
It is expressed as Δ TA=TA-TA '；
B. Δ TA is updatedmaxWith Δ TAminValue: if Δ TAmax＜ Δ TA, then Δ TAmaxIt is updated to Δ TA, otherwise Δ TAmax
Constant；If Δ TAmin＞ Δ TA, then Δ TAminIt is updated to Δ TA, otherwise Δ TAminConstant.
It is up not that third party's instrument the most according to claim 2 processes multiple terminals when monitoring lte-a system
Synchronize method, it is characterised in that when be currently accessed terminal k ∈ (1,2 ..., n) terminate connect time, third party
Instrument processes residue access terminal reception upstream data and specifically includes:
(1) Δ TA is updatedmaxWith Δ TAminValue: Δ TAmaxIt is updated to Δ TAmax=max (Δ TAi, i=1,2 ..., n and i ≠ k)；
ΔTAminIt is updated to Δ TAmin=min (Δ TAi, i=1,2 ..., n and i ≠ k)；
(2) it is currently accessed number of terminals n and is updated to n-1.
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| CN105848278B (en) | 2019-03-08 |
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