CN106851815A - The uplink synchronisation method when RRC state of UE is DCH states in WCDMA direction-finding systems - Google Patents
The uplink synchronisation method when RRC state of UE is DCH states in WCDMA direction-finding systems Download PDFInfo
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- H—ELECTRICITY
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- 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
- H04W56/00—Synchronisation arrangements
- H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
Abstract
Uplink synchronisation method when the invention discloses a kind of RRC state of UE in WCDMA direction-finding systems being DCH states, detailed process includes：Solution common down channel identifies target UE and the uplink synchronous of target is carried out according to corresponding configuration information.When common down channel is solved, the method for taking solution RRC CONNECTION SETUP signalings judges whether it is downlink signaling that target is issued in base station by the TMSI or IMSI in this signaling, and the RRC state of UE is when being DCH, carries out uplink synchronous.In synchronizing process, Frequency Synchronization first is carried out according to configuration, Domain Synchronous are then carried out again.After the starting point for calculating search window according to configuration information, the signal to noise ratio for sliding correlation computations so as to estimate peak point is done with the local sequence for constituting and the sequence for receiving, if signal to noise ratio is more than threshold value, then it is assumed that this value is effective and reports the energy for receiving.
Description
Technical field
The present invention relates to wireless mobile telecommunication technology field, and in particular to the RRC state of UE in a kind of WCDMA direction-finding systems
Uplink synchronisation method during for DCH states.
Background technology
In a wireless communication system, terminal device and base station equipment are led to according to the agreement of agreement using wireless signal
Letter.Third party's direction-finding system be different from terminal device and base station equipment, it be one can and meanwhile receive upward signal (terminal send out
To the signal of base station) and downstream signal (issuing the signal of terminal in base station) a transportable equipment, its effect be
The up-link wireless signal of middle capture particular terminal of eating dishes without rice or wine, so as to estimate its transmission power.
Third party's direction-finding system, first has to be identified in numerous wireless signals the signal of UE, then again to the upper of UE
Row signal is measured.Traditional third party's direction-finding system, is to identify UE by upward signal, because its device height is not so good as
Base station is high, therefore its upward signal demodulation ability is limited, so that its operating distance is short.If recognizing UE with downstream signal, can be with
Covering wide advantage using downstream signal increases the operating distance of equipment.
In a wcdma system, the RRC state of UE has 4 kinds of states：IDLE state, DCH states, FACH (Forward
Access Channel) state and PCH (Paging Channel) state.During base station scheduling, according to different business
Size, can make UE enter different states, and its different state corresponds to different physical channels on a physical layer.For example, such as
Fruit enters DCH states, and up channel is DPCCH (Dedicated Physical Control Channel) and DPDCH
(Dedicated Physical Data Channel), descending channel is DPCCH and DPDCH；If into FACH state,
Up channel is then PRACH (Physical Random Access Channel), and corresponding descending channel is SCCPCH
(Secondary Common Control Physical Channel).For different physical channels, its channel format is not
With, the user that carries is different, the corresponding sequential relationship of its up-downgoing is different, which results in direction-finding system, its measurement side
Method is also different.
The content of the invention
The invention aims to solve drawbacks described above of the prior art, there is provided a kind of WCDMA WCDMA
RRC (the Radio of UE (USER) in (Wideband Code Division Multiple Access) direction-finding system
Resource Control) state be DCH (Dedicated Channel) state when uplink synchronisation method.
The purpose of the present invention can be reached by adopting the following technical scheme that：
A kind of uplink synchronisation method when the RRC state of UE is DCH states in WCDMA direction-finding systems, the uplink synchronous
Method includes：
S1, descending main synchronous, auxiliary synchronization, cell scrambling identification, solution system message；
S2, common down channel is solved on SCCPCH, recognized by the RRC CONNECTION SETUP signalings for solving and used
Family；
S3, the parameter in signaling carry out uplink synchronous, in synchronizing process, first carry out Frequency Synchronization according to configuration,
Then Domain Synchronous are carried out again, wherein state of the Domain Synchronous again according to activation collection be divided into it is synchronous at once and non-same at once
Step；After the starting point for calculating search window according to configuration information, cunning is done with the sequence for receiving with the local sequence for constituting
Correlation computations are moved so as to estimate the signal to noise ratio of peak point, if signal to noise ratio is more than threshold value, then it is assumed that this value is effective and reports reception
The energy for arriving.
Further, the detailed process that system message is solved in the step S1 is as follows：
SIB5 obtains corresponding systematic parameter in read system message, and the SIB5 message includes the thing of descending solution SCCPCH
Reason layer parameter configuration.
Further, the step S2 specifically includes substep：
S201, the information of the extraction common signal channel that decaptitated by physical layer solution SCCPCH, MAC layer, rlc layer group bag, ASN.1 are solved
Code, obtains RRC CONNECTION SETUP signalings；
S202, the parameter for collecting the RRC CONNECTION SETUP signalings, its parameter include：Up scrambler class
Type, scrambling code number, time slot format, upper line displacement DOFF, activationary time, RRC state, UE marks；
S203, judge the UE for comparing the RRC CONNECTION SETUP signalings identify whether be target to be measured mark
Know, if it is continue next step S204, otherwise abandon this signaling；
Whether S204, the RRC state for judging target UE are DCH, and the RRC shapes of UE are carried out if yes then enter the step S3
Uplink synchronous treatment when state is DCH, if it is not, then being transferred to the uplink synchronous treatment of the RRC state for carrying out other UE.
Further, the step S3 specifically includes substep：
S301, the parameter for reading the collection from the RRC CONNECTION SETUP signalings；
S302, judge above-mentioned parameter in activationary time whether there is, if there is step S303 is then jumped to, if do not deposited
Then jumping to step S306；
S303, calculate and read CFN；
S304, judge current CFN whether be equal to default activation moments, step S306 is jumped to if equal, such as
It is really unequal, then jump to step S305；
When S305, wait next frame process time are reached, step S303 is jumped to；
The starting point of S306, selection sliding window, and slip correlation computations are done with the sequence for receiving with local sequence, obtain
One group of retarding power spectrum；
S307, the peak point V of retarding power spectrum is filtered out, and estimate signal to noise ratio snr；
S308, the signal to noise ratio snr is compared with threshold value, if greater than threshold value, be then transferred to step S310, be otherwise transferred to step
Rapid S309；
This time measurement is invalid for S309, judgement；
S310, the uplink synchronous point for determining target, the target energy that will have been identified are reported.
Further, in the step S303 CFN computing formula：
CFN=(SFN- ((DOFF × 512) div38400)) mod256,
Wherein, DOFF is the parameter for having obtained, and SFN is the sequence number of each system-frame.
Further, the estimation process of signal to noise ratio snr is specially in the step S307：
One group of retarding power spectrum is obtained after sliding correlation computations, its number is window number long, in this retarding power spectrum
In, peak point V is found, and with the average N of non-peak point as noise estimation value, then finally obtained signal to noise ratio is SNR=
V/N。
The present invention has the following advantages and effect relative to prior art：
The uplink synchronisation method when RRC state of UE is DCH states in WCDMA direction-finding systems disclosed by the invention, passes through
Solution RRC CONNECTION SETUP signalings in descending discovery target, the then up configuration synchronization target according to signaling, significantly
The measurement distance and efficiency that increased in third party's WCDMA direction-finding systems.When the RRC state of UE is DCH, given is upper
The synchronous method of row, is greatly reduced amount of calculation and reduces interference.
Brief description of the drawings
Fig. 1 is the workflow diagram of third party's direction-finding system in the present invention；
Fig. 2 be UE of the invention RRC state be DCH when downlink processing flow chart；
Fig. 3 be UE of the invention RRC state be DCH when up process chart.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment
This gives in third party's WCDMA direction-finding systems target and then up direction finding are recognized using downstream signal
Scheme, while having various situations in view of the RRC state of UE, according to the characteristic of DCH states, the RRC state for giving UE is
Uplink synchronisation method during DCH.
Its detailed process includes：1, solution common down channel identifies target UE；2, carried out according to corresponding configuration information
The uplink synchronous of target.
When common down channel is solved, the method for understanding RRC CONNECTION SETUP signalings is taken.By this signaling
In TMSI or IMSI judge whether it is downlink signaling that target is issued in base station.If the target being intended to, and UE RRC
When state is DCH, then uplink synchronous are carried out according to the method for this patent.
In synchronizing process, Frequency Synchronization first is carried out according to configuration, Domain Synchronous are then carried out again.Domain Synchronous therein
The state according to activation collection is divided into synchronous at once and non-synchronous at once again.The starting point of search window is being calculated according to configuration information
Afterwards, the signal to noise ratio for sliding correlation computations so as to estimate peak point is done with the local sequence for constituting and the sequence for receiving, if
Signal to noise ratio is more than threshold value, then it is assumed that this value is effective and reports the energy for receiving.
As shown in Figure 1, Fig. 1 is the workflow diagram of third party's direction-finding system in the present invention, third party's lateral system
Workflow comprises the following steps：
Step S1, descending main synchronous, auxiliary synchronization, cell scrambling identification, solution system message；
The step is the processed conventionally first step of WCDMA direction-finding systems, is the process of cell searching, including descending master
Synchronization, auxiliary synchronization, cell scrambling identification, solution system message.In system message (system broadcast message), including SIB1,
SIB2 ..., SIB12, major concern SIB5, SIB5 will be read obtain corresponding systematic parameter, because this message arrangement is descending
Solve the physical layer parameter configuration of SCCPCH.
Step S2, common down channel is solved on SCCPCH, known by the RRC CONNECTION SETUP signalings for solving
Other user；
The step is that common down channel is solved on SCCPCH, so as to solve its signaling for being carried.This channel is public letter
Road, MAC layer and rlc layer are not encrypted.In the RRC CONNECTION SETUP signalings for solving, the mark comprising user
Know, this mark can carry out identifying user, and common is identified with TMSI, P-TMSI, IMSI, S-RNTI.
Step S3, the parameter in signaling carry out uplink synchronous, first same into line frequency according to configuring in synchronizing process
Step, then carries out Domain Synchronous again, wherein state of the Domain Synchronous again according to activation collection be divided into it is synchronous at once and it is non-at once
It is synchronous；After the starting point for calculating search window according to configuration information, done with the sequence for receiving with the local sequence for constituting
Correlation computations are slided so as to estimate the signal to noise ratio of peak point, if signal to noise ratio is more than threshold value, then it is assumed that this value effectively and is reported and connect
The energy for receiving.
In this step, according to the result of step S2, target UE is synchronized and is measured.RRC state according to UE is not
Together, its processing method is also different.
As shown in Fig. 2 the downlink processing flow chart when RRC state that Fig. 2 is UE of the invention is DCH, Fig. 2 corresponds to above-mentioned
Step S2, specifically includes substep：
Step S201, decaptitated by physical layer solution SCCPCH, MAC layer extract the information of common signal channel, rlc layer group bag,
ASN.1 is decoded, and may finally obtain RRC CONNECTION SETUP signalings.
Step S202, the parameter for collecting the RRC CONNECTION SETUP signalings, its parameter include：Up scrambler
Type, scrambling code number, time slot format, upper line displacement DOFF (Default DPCH Offset Value), activationary time, RRC shapes
State, UE marks.
The step is related parameter in collecting signaling, and its parameter includes：Up scrambler type, scrambling code number, when
Gap form, upper line displacement DOFF, activationary time, RRC state, UE marks.
The UE that step S203, judgement compare the RRC CONNECTION SETUP signalings identifies whether it is target to be measured
Mark, if it is continues next step S204, otherwise abandons this signaling.
The step be used for judge this signaling identify whether be target to be measured mark, if it is go to step
S204, otherwise now this signaling is not the signaling of target, it is possible to abandoned, and step S201 is gone to afterwards, continues to eat dishes without rice or wine
In descending RRC CONNECTION SETUP signalings.
Whether step S204, the RRC state for judging target UE are DCH, carry out UE's if yes then enter the step S3
Uplink synchronous treatment when RRC state is DCH, if it is not, then being transferred at the uplink synchronous of the RRC state for carrying out other UE
Reason.
In concrete application, the RRC state of the UE can also include PCH or FACH, when the RRC shapes of target UE except DCH
When state is not DCH, the uplink synchronous treatment of the RRC state for carrying out other UE is transferred to, is not the focal point of this patent now.
As shown in figure 3, the up process chart when RRC state that Fig. 3 is UE of the invention is DCH, Fig. 3 corresponds to above-mentioned
Step S3, specifically includes substep：
Step S301, the parameter for reading the collection from the RRC CONNECTION SETUP signalings.
The parameter that the step is used for the RRC CONNECTION SETUP signalings collected from the step S202 is entered
Row digital independent.
Step S302, judge above-mentioned parameter in activationary time whether there is, if there is then jumping to step S303, if
In the absence of then jumping to step S306；
Activationary time whether there is during the step is used for judging the data collected, if there is then jumping to step S303；
If there is no then jumping to step S306.
Step S303, reading CFN (Connect ion Frame Number)；
The step is used for reading CFN, its computing formula：
CFN=(SFN- ((DOFF × 512) div38400)) mod256,
DOFF (Default DPCH Offset Value) therein is the parameter for having obtained.SFN(System
Frame Number) be each system-frame sequence number.
In each communication process, CFN differs certain constant with system-frame SFN.
Step S304, judge current CFN whether be equal to default activation moments, step is jumped to if equal
S306, if unequal, jumps to step S305；
The step is used for judging that whether current CFN, equal to default activation moments, jumps to step if equal
S306, if unequal, jumps to step S305.
When step S305, wait next frame process time are reached, step S303 is jumped to.
Now have determined that and be also not reaching to activation moments, then when waiting next frame process time to reach, jump to
Step S303, carries out judging whether to reach activation moments again after reading CFN.
The starting point of step S306, selection sliding window, and slip correlation computations are done with the sequence for receiving with local sequence,
Obtain one group of retarding power spectrum；
The step is used to select the starting point of sliding window, and makees slip correlometer with the sequence for receiving with local sequence
Calculate.
When the RRC state of UE is DCH, the uplink physical channel of UE is DPCH, with other user's scramblers
Make a distinction；The down physical channel of UE is DPCH, with other user's spreading codes and the side-play amount of relative broadcast
Make a distinction.Based on following two relations：(1) downlink reception of user relative to broadcast side-play amount can by mod (DOFF,
38400) calculate；(2) the descending reception of up transmitting ratio postpones 1024 chips, it is possible to determine the up hair of target
Send the time.Consider further that because target and direction-finding equipment have a segment distance, and target is arrived to the distance of base station with direction-finding equipment
The distance of base station is different, in addition it is also necessary to slide the distance of 1/2 window size long to the left in the up starting point for having calculated, i.e.,
Can determine that the starting point of up sliding window.
Local sequence is by the frame that is obtained after spread spectrum and scrambling according to the time slot format of distribution to ascending pilot frequency symbol
Sequence, its corresponding parameter has been obtained in step S301.
Step S307, the peak point V of retarding power spectrum is filtered out, and estimate signal to noise ratio snr；
In concrete application, it is one group of retarding power spectrum to slide the result after correlation computations, and its number is window number long.
Estimate signal to noise ratio in this retarding power spectrum.For example, in power spectrum signal estimate, peak point V is found, and with non-peak point
Average N is SNR=V/N as noise estimation value, then finally obtained signal to noise ratio.
Step S308, the signal to noise ratio snr is compared with threshold value, if greater than threshold value, be then transferred to step S310, otherwise turned
Enter step S309.
In concrete application, the signal to noise ratio snr that will be calculated compares with threshold value, if greater than threshold value, is then transferred to step
S310；Otherwise it is transferred to step S309.
This time measurement is invalid for step S309, judgement；
Because signal to noise ratio is too small, the signal of target can not be demodulated out, and it is target that now we do not distinguish
Signal or interference signal, then it is assumed that this time measurement it is invalid.
Step S310, the uplink synchronous point for determining target, the target energy that will have been identified are reported.
The uplink synchronous point of target is now had determined, then reports the energy of target to upper strata.
In sum, it is up same when the RRC state of UE is DCH states in WCDMA direction-finding systems disclosed in the present embodiment
One step process, by solving RRC CONNECTION SETUP signalings in descending discovery target, then the up configuration according to signaling is same
Step target, greatly increased the measurement distance and efficiency in third party's WCDMA direction-finding systems.It is DCH in the RRC state of UE
When, the method for given uplink synchronous is greatly reduced amount of calculation and reduces interference.
Above-described embodiment is the present invention preferably implementation method, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (6)
1. the uplink synchronisation method when RRC state of UE is DCH states in a kind of WCDMA direction-finding systems, it is characterised in that described
Uplink synchronisation method includes：
S1, descending main synchronous, auxiliary synchronization, cell scrambling identification, solution system message；
S2, common down channel is solved on SCCPCH, by the RRC CONNECTION SETUP signaling identifying users for solving；
S3, the parameter in signaling carry out uplink synchronous, in synchronizing process, first carry out Frequency Synchronization according to configuration, then
Carry out Domain Synchronous again, wherein state of the Domain Synchronous again according to activation collection be divided into it is synchronous at once and non-synchronous at once；
Calculated according to configuration information after the starting point of search window, slip is done to the sequence for receiving with the local sequence for constituting related
Calculate so as to estimate the signal to noise ratio of peak point, if signal to noise ratio is more than threshold value, then it is assumed that this value is effective and reports the energy for receiving
Amount.
2. the uplink synchronisation method when RRC state of UE is DCH states in WCDMA direction-finding systems according to claim 1,
Characterized in that, the detailed process that system message is solved in the step S1 is as follows：
SIB5 obtains corresponding systematic parameter in read system message, and the SIB5 message includes the physical layer of descending solution SCCPCH
Parameter configuration.
3. the uplink synchronisation method when RRC state of UE is DCH states in WCDMA direction-finding systems according to claim 1,
Characterized in that, the step S2 specifically includes substep：
S201, the information of the extraction common signal channel that decaptitated by physical layer solution SCCPCH, MAC layer, rlc layer group bag, ASN.1 are decoded,
Obtain RRC CONNECTION SETUP signalings；
S202, the parameter for collecting the RRC CONNECTION SETUP signalings, its parameter include：Up scrambler type, disturb
Code number, time slot format, upper line displacement DOFF, activationary time, RRC state, UE mark；
S203, judge the UE for comparing the RRC CONNECTION SETUP signalings identify whether be target to be measured mark, such as
Fruit is then to continue next step S204, otherwise abandons this signaling；
Whether S204, the RRC state for judging target UE are DCH, and the RRC state for carrying out UE if yes then enter the step S3 is
Uplink synchronous treatment during DCH, if it is not, then being transferred to the uplink synchronous treatment of the RRC state for carrying out other UE.
4. the uplink synchronisation method when RRC state of UE is DCH states in WCDMA direction-finding systems according to claim 1,
Characterized in that, the step S3 specifically includes substep：
S301, the parameter for reading the collection from the RRC CONNECTION SETUP signalings；
S302, judge above-mentioned parameter in activationary time whether there is, if there is step S303 is then jumped to, if there is no then
Jump to step S306；
S303, calculate and read CFN；
S304, judge current CFN whether be equal to default activation moments, step S306 is jumped to if equal, if not
It is equal, then jump to step S305；
When S305, wait next frame process time are reached, step S303 is jumped to；
The starting point of S306, selection sliding window, and slip correlation computations are done with the sequence for receiving with local sequence, obtain one group
Retarding power spectrum；
S307, the peak point V of retarding power spectrum is filtered out, and estimate signal to noise ratio snr；
S308, the signal to noise ratio snr is compared with threshold value, if greater than threshold value, be then transferred to step S310, be otherwise transferred to step
S309；
This time measurement is invalid for S309, judgement；
S310, the uplink synchronous point for determining target, the target energy that will have been identified are reported.
5. the uplink synchronisation method when RRC state of UE is DCH states in WCDMA direction-finding systems according to claim 4,
Characterized in that,
The computing formula of CFN in the step S303：
CFN=(SFN- ((DOFF × 512) div38400)) mod256,
Wherein, DOFF is the parameter for having obtained, and SFN is the sequence number of each system-frame.
6. the uplink synchronisation method when RRC state of UE is DCH states in WCDMA direction-finding systems according to claim 4,
Characterized in that, the estimation process of signal to noise ratio snr is specially in the step S307：
One group of retarding power spectrum is obtained after sliding correlation computations, its number is window number long, in this retarding power spectrum, is sought
Look for peak point V, and with the average N of non-peak point as noise estimation value, then finally obtained signal to noise ratio is SNR=V/N.
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|---|---|---|---|---|
| CN112118622A (en) * | 2019-06-20 | 2020-12-22 | 大唐联仪科技有限公司 | WCDMA uplink synchronous position detection method and device |
| CN112118622B (en) * | 2019-06-20 | 2023-03-03 | 大唐联仪科技有限公司 | WCDMA uplink synchronous position detection method and device |
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| CN106851815B (en) | 2019-07-09 |
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