CN106851704A - A kind of method that WCDMA system carries out multiple cell trace scheduling - Google Patents
A kind of method that WCDMA system carries out multiple cell trace scheduling Download PDFInfo
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- CN106851704A CN106851704A CN201710084548.2A CN201710084548A CN106851704A CN 106851704 A CN106851704 A CN 106851704A CN 201710084548 A CN201710084548 A CN 201710084548A CN 106851704 A CN106851704 A CN 106851704A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0093—Neighbour cell search
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J2011/0096—Network synchronisation
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- Mobile Radio Communication Systems (AREA)
Abstract
The present invention proposes a kind of method that WCDMA system carries out multiple cell trace scheduling, it is good pseudo random sequence code autocorrelation using WCDMA scramblers, the characteristic of cross correlation difference, the scrambler of partial-length can be only generated in real process, synchronous tracking performance is met, so that using adjacent area time offset, estimate the substantially frame header position of adjacent area, window is selected again long, correlation is carried out using the scrambler of partial-length, carry out adjacent area search；Selection meets the part scrambler of performance condition carries out correlation, it is to avoid full scrambler it is related can be due to influences such as frequency deviations it is cumulative, the problems such as being likely to result in signal to noise ratio and decline.
Description
Technical field
The present invention relates to the method for synchronized in 3-G (Generation Three mobile communication system), more particularly to a kind of WCDMA system is entered
The method of row multiple cell trace scheduling.
Background technology
WCDMA（Wideband Code Division Multiple Access, are often abbreviated as WCDMA）System
It is general that information analysis only are carried out to main plot in system, by the way of then being monitored using signal quality to adjacent area.And in some special necks
Domain aspect, such as in the mobile communication terminal location equipment in the disaster relief such as road detector, earthquake and colliery place, not only need small to master
Area carries out information analysis, the requirement for also having information analysis to adjacent area.
In a wcdma system, it is usually that a frame 10ms carries out a search for adjacent area to carry out adjacent area searching method, for close
Collection city, adjacent area is more, can so influence the tracking efficiency of multiple cell, and its complexity is higher, spends the time more long, does not reach more
The real-time of many neighboring BS information parsing required by special dimension.
The content of the invention
It is an object of the invention to provide a kind of method that WCDMA system carries out multiple cell trace scheduling, satisfaction property is selected
Can the part scrambler of condition carry out correlation, it is to avoid full scrambler it is related can be due to influences such as frequency deviations it is cumulative, be likely to result in letter
Make an uproar the problems such as than declining, and meet the real time parsing of multiple cell information required by special dimension.
To achieve these goals, the present invention proposes a kind of method that WCDMA system carries out multiple cell trace scheduling, wraps
Include step：
First, cell searching is carried out, slot synchronization is carried out using Primary Synchronisation Code, secondary synchronization code carries out the knowledge of frame synchronization and scrambler group
Not, the related main scrambler of determination of 8 groups of scramblers is carried out in scrambler group, main plot is determined；
2nd, the system message that the main plot sends is parsed, the system message is divided into multiple system message modules, the system
Message module includes Location Area Code, cell ID and Neighboring Cell List, time of the Neighboring Cell List comprising adjacent area scrambler and adjacent area
Biasing；
3rd, synchronously calculated at the beginning of carrying out adjacent area, and generate effective Neighboring Cell List；According to the adjacent area scrambler, full adjacent area scrambler is taken
Fractional chips, generating portion scrambler carries out neighbour at the time offset of adjacent area using the part scrambler to downgoing baseband data
Synchronously calculated at the beginning of area, obtain the frame originating point information of adjacent area；If the continuous A frames absolute difference of the adjacent area frame head is less than setting value B, sentence
The fixed cell is effective adjacent area, carries out the parsing of effective system information in neighboring area；It is otherwise invalid adjacent area, does discard processing；
4th, effective adjacent-area list renewing, the smart synchronized tracking that the effective Neighboring Cell List to generating carries out part scrambler is calculated, amendment
Due to the frame header deviation that frequency deviation is brought, new frame head and signal to noise ratio is calculated；If the frame head of cell in follow-up renewal process
Continuous D frames absolute difference is less than setting value B, continues to be judged to efficient cell, is otherwise invalid cell, abandons；If effectively small
The number in area is 0, then whole flow process is all initialized, and re-starts cell searching；
5th, main plot updates；For the signal-to-noise ratio data obtained from effective Neighboring Cell List, by the signal-to-noise ratio data according to from height
It is ranked up to low, if the signal to noise ratio in continuous C frame ins cell ranks the first, and its scrambler is not equal to current main plot
Scrambler, then the cell is replaced into current main plot turns into new main plot；If being unsatisfactory for above-mentioned condition, proceed adjacent area essence
Synchronized tracking is calculated；If meeting above-mentioned condition, to new main plot repeat step two to step 3, generate the main plot has
Effect Neighboring Cell List.
Further, in a kind of described WCDMA system carries out the method for multiple cell trace scheduling, generating portion scrambler
The step of include：According to the adjacent area scrambler of the Neighboring Cell List for obtaining, only with 4096 chip portions before complete 38400 chip scrambler
Point, generate the part scrambler of 4096 length.
Further, in a kind of described WCDMA system carries out the method for multiple cell trace scheduling, in step 3,
The continuous A frames value is 3, and setting value B values are 4.
Further, in a kind of described WCDMA system carries out the method for multiple cell trace scheduling, in step 4,
The continuous D frames value is 6.
Further, in a kind of described WCDMA system carries out the method for multiple cell trace scheduling, in step 5,
The continuous C frames value is 50.
Compared with prior art, the beneficial effects are mainly as follows：It is pseudo random sequence code using WCDMA scramblers
Autocorrelation is good, the characteristic of cross correlation difference, and the scrambler of partial-length can be only generated in real process, and inclined using the adjacent area time
Put, estimate the substantially frame header position of adjacent area, then selected window is long, and correlation is carried out using the scrambler of partial-length, carries out adjacent area and searches
Rope and tracking；Selection meets the part scrambler of performance condition carries out correlation, it is to avoid full scrambler is related to be influenceed due to frequency deviation etc.
It is cumulative, the problems such as being likely to result in signal to noise ratio and decline, and greatly reduce computational complexity, and meet special dimension and want
The real time parsing of many neighboring BS information asked.
Brief description of the drawings
Fig. 1 is the system structure diagram for carrying out multiple cell trace scheduling in the present invention using WCDMA system；
Fig. 2 is the first search routine schematic diagram of cell in the present invention；
Fig. 3 is cell essence synchronized tracking schematic flow sheet in the present invention.
Specific embodiment
The method that a kind of WCDMA system of the invention carries out multiple cell trace scheduling is carried out below in conjunction with schematic diagram more detailed
Thin description, which show the preferred embodiments of the present invention, it should be appreciated that those skilled in the art can change and be described herein
The present invention, and still realize advantageous effects of the invention.Therefore, description below is appreciated that for people in the art
Member's is widely known, and is not intended as limitation of the present invention.
For clarity, not describing whole features of practical embodiments.In the following description, it is not described in detail known function
And structure, because they can make the present invention chaotic due to unnecessary details.It will be understood that opening in any practical embodiments
In hair, it is necessary to make a large amount of implementation details to realize the specific objective of developer, such as according to relevant system or relevant business
Limitation, another embodiment is changed into by one embodiment.Additionally, it should think that this development is probably complicated and expends
Time, but it is only to those skilled in the art routine work.
The present invention is more specifically described by way of example referring to the drawings in the following passage.Will according to following explanation and right
Book is sought, advantages and features of the invention will become apparent from.It should be noted that, accompanying drawing is in the form of simplifying very much and using non-
Accurately ratio, is only used to conveniently, lucidly aid in illustrating the purpose of the embodiment of the present invention.
Fig. 1 is refer to, signal source energy detection system 10 gathers the signal of eating dishes without rice or wine based on certain frequency that base station is sent, under
It is converted to base band（It is baseband signal that base station signal modulation is reduced into frequency）, it is transferred to the descending core of base station signal processing module 100
Heart processing module, the module parses the cell information of base station（Location Area Code LAC, cell ID CID）With known target place
Location Area Code and cell ID compare, to determine the place cell of target 20；Entering target position area（Position area
Code LAC）Afterwards, start induction module 102 to be communicated with target 20.
Then, the descending parsing of base station signal processing module 100 induces the communication link between module 102 and target 20, obtains
To the uplink scrambling code and synchronous dot position information of target signal source.Uplink scrambling code and synchronous dot position information are transferred to up letter
Number source processing module 101.Upward signal source processing module 101 calculates target according to the uplink scrambling code and synchronous point position for obtaining
The upgoing energy of signal source.
In the present embodiment, emphasis illustrates that the multiple cell in descending base station signal processing module 100 is tracked and scheduling
Flow, specifically refer to Fig. 2 and Fig. 3, cell specific method where determining target terminal, and determination target terminal is played in systems
The effect of place cell, its method comprises the following steps：
First, cell searching is carried out, slot synchronization is carried out using Primary Synchronisation Code, secondary synchronization code carries out the knowledge of frame synchronization and scrambler group
Not, the related main scrambler of determination of 8 groups of scramblers is carried out in scrambler group, main plot is determined；2nd, the system that the main plot sends is parsed
Message, the system message is divided into multiple system message modules（SIBs）, the system message module is parsed to obtain position area
The information such as code LAC, cell ID CID；Parse the system message module and obtain Neighboring Cell List, Neighboring Cell List is comprising a series of
The information such as the time offset of adjacent area scrambler and adjacent area；
3rd, synchronously calculated at the beginning of carrying out adjacent area, generate effective Neighboring Cell List；According to the adjacent area scrambler, part scrambler is only generated, profit
Synchronously calculated at the beginning of carrying out adjacent area to downgoing baseband data at the time offset of adjacent area with the part scrambler, obtain the frame of adjacent area
Header；If the continuous A frames absolute difference of the adjacent area frame head is less than setting value B, judge that the cell is effective adjacent area, had
Imitate the parsing of system information in neighboring area；It is otherwise invalid adjacent area, does discard processing；
4th, effective adjacent-area list renewing, the smart synchronized tracking that the effective Neighboring Cell List to generating carries out part scrambler is calculated, amendment
Due to the frame header deviation that frequency deviation is brought, new frame head and signal to noise ratio is calculated；If the frame head of cell in follow-up renewal process
Continuous D frames absolute difference is less than setting value B, continues to be judged to efficient cell, is otherwise invalid cell, abandons；If effectively small
The number in area is 0, then whole flow process is all initialized, and re-starts cell searching；
5th, main plot updates；For the signal-to-noise ratio data obtained from effective Neighboring Cell List, by the signal-to-noise ratio data according to from height
It is ranked up to low, if the signal to noise ratio in continuous C frame ins cell ranks the first, and its scrambler is not equal to current main plot
Scrambler, then the cell is replaced into current main plot turns into new main plot；If being unsatisfactory for above-mentioned condition, proceed adjacent area essence
Synchronized tracking is calculated；If meeting above-mentioned condition, to new main plot repeat step two to step 3, generate the main plot has
Effect Neighboring Cell List.
Specifically, in step 3, according to a series of adjacent area scramblers of the Neighboring Cell List for obtaining, need to only utilize 38400 yards
Preceding 4096 chip parts of the full scrambler of piece, generate the part scrambler of 4096 length；Found being contrasted by actual emulation, used
The part scrambler of 4096 length carries out the related synchronization that can just meet real system and tracking, and overcomes full scrambling code search and make
Into signal to noise ratio decline problem.Such that it is able to be carried out at the time offset of adjacent area to downgoing baseband using the part scrambler
Data（The downstream signal that base station i.e. around signal source energy detection system sends）Synchronously calculated at the beginning of carrying out adjacent area, obtain adjacent area
Frame head（Original position）Information；If the continuous A frames absolute difference of the adjacent area frame head is less than setting value B（Wherein, A frames value is
3, B values can be 4）, it is believed that the cell is effective adjacent area, carries out the parsing of required parameter（Such as Location Area Code LAC, cell mark
Know the information such as CID）, be otherwise invalid adjacent area, then abandon, so as to generate effective Neighboring Cell List.
In step 4, due to requiring to look up target location area code LAC and cell ID CID, signal source energy measuring system
System 10 during mobile use, so must the subdistrict position area yard LAC and cell ID CID that is resolved to of real-time update；And
There is the frequency deviation influence produced by crystal oscillator in signal source energy detection system 10, so having to carry out all efficient cells essence together
Step tracking carrys out the frame head of real-time update efficient cell.Using the part scrambler at the just synchronous frame head for being obtained, from 64
Window is long to downgoing baseband data（The downstream signal that base station i.e. around signal source energy detection system sends）Carry out efficient cell
Smart synchronized tracking is calculated, and is calculated frame head and signal to noise ratio.If the continuous D frames absolute difference of the frame head of subsequent cell is less than setting
Value B（Wherein, continuous D frames value is 6）, continue to be judged to efficient cell, otherwise it is invalid cell, abandon.
If additionally, the number of efficient cell is 0, then whole flow process is all initialized, and reenters cell searching.
In step 5, for the signal-to-noise ratio data obtained from effective Neighboring Cell List, by the signal-to-noise ratio data according to from
High to Low to be ranked up, if the signal to noise ratio in continuous C frame ins cell ranks the first, and its scrambler is not equal to main plot and disturbs
Code, then the cell replaces original main plot turns into new main plot, if being unsatisfactory for above-mentioned condition, proceeds efficient cell
Smart synchronized tracking calculate；Step 2 is jumped to new main plot to repeat the above steps, generate effective neighbour of the new main plot
Area's list.
It can be seen that, in the present invention, employ short scrambler correlation, i.e., it is pseudo random sequence code autocorrelation using WCDMA scramblers
Good, the characteristic of cross correlation difference can only generate the scrambler of 4096 length in real process, meet synchronous tracking performance.Using neighbour
Area's time offset, estimates the substantially frame header position of adjacent area, and selected 64 windows are long, and correlation is carried out using the scrambler of 4096 length, enter
Row adjacent area is searched for.
To sum up, in a kind of WCDMA system provided in an embodiment of the present invention carries out the method for multiple cell trace scheduling, exist
Advantages below：
1st, under conditions of adjacent area search effect is not influenceed, in the length that scrambler generates related to scrambler, using part scrambler
The time and complexity that correlation is spent are original 1/10 or so, so as to improve cell searching efficiency；2nd, full scrambler is overcome
The problem that the signal to noise ratio that search is caused declines；3rd, content described in this patent can be utilized in terms of special dimension, such as road detector,
In the mobile communication terminal location equipment in disaster relief place such as earthquake and colliery., the adjacent area that also can be widely used in mobile terminal is searched
Suo Zhong；4th, neighboring cell signal quality parameter can be not only monitored, the cell parameter and other letters of adjacent area can also be obtained by parsing
Road parameter；
The preferred embodiments of the present invention are above are only, any restriction effect is not played to the present invention.Technology belonging to any
The technical staff in field, not departing from the range of technical scheme, to the invention discloses technical scheme and technology
Content makes the variation such as any type of equivalent or modification, belongs to the content without departing from technical scheme, still falls within
Within protection scope of the present invention.
Claims (5)
1. a kind of method that WCDMA system carries out multiple cell trace scheduling, it is characterised in that including step：
First, cell searching is carried out, slot synchronization is carried out using Primary Synchronisation Code, secondary synchronization code carries out the knowledge of frame synchronization and scrambler group
Not, the related main scrambler of determination of 8 groups of scramblers is carried out in scrambler group, main plot is determined；
2nd, the system message that the main plot sends is parsed, the system message is divided into multiple system message modules, the system
Message module includes Location Area Code, cell ID and Neighboring Cell List, time of the Neighboring Cell List comprising adjacent area scrambler and adjacent area
Biasing；
3rd, synchronously calculated at the beginning of carrying out adjacent area, and generate effective Neighboring Cell List；According to the adjacent area scrambler, full adjacent area scrambler is taken
Fractional chips, generating portion scrambler carries out neighbour at the time offset of adjacent area using the part scrambler to downgoing baseband data
Synchronously calculated at the beginning of area, obtain the frame originating point information of adjacent area；If the continuous A frames absolute difference of the adjacent area frame head is less than setting value B, sentence
The fixed cell is effective adjacent area, carries out the parsing of effective system information in neighboring area；It is otherwise invalid adjacent area, does discard processing；
4th, effective adjacent-area list renewing, the smart synchronized tracking that the effective Neighboring Cell List to generating carries out part scrambler is calculated, amendment
Due to the frame header deviation that frequency deviation is brought, new frame head and signal to noise ratio is calculated；If the frame head of cell in follow-up renewal process
Continuous D frames absolute difference is less than setting value B, continues to be judged to efficient cell, is otherwise invalid cell, abandons；If effectively small
The number in area is 0, then whole flow process is all initialized, and re-starts cell searching；
5th, main plot updates；For the signal-to-noise ratio data obtained from effective Neighboring Cell List, by the signal-to-noise ratio data according to from height
It is ranked up to low, if the signal to noise ratio in continuous C frame ins cell ranks the first, and its scrambler is not equal to current main plot
Scrambler, then the cell is replaced into current main plot turns into new main plot；If being unsatisfactory for above-mentioned condition, proceed adjacent area essence
Synchronized tracking is calculated；If meeting above-mentioned condition, to new main plot repeat step two to step 3, generate the main plot has
Effect Neighboring Cell List.
2. the method that WCDMA system as claimed in claim 1 carries out multiple cell trace scheduling, it is characterised in that generating portion
The step of scrambler, includes：According to the adjacent area scrambler of the Neighboring Cell List for obtaining, only with first 4096 yards of complete 38400 chip scrambler
Piece part, generates the part scrambler of 4096 length.
3. the method that WCDMA system as claimed in claim 1 carries out multiple cell trace scheduling, it is characterised in that in step 3
In, the continuous A frames value is 3, and setting value B values are 4.
4. the method that WCDMA system as claimed in claim 1 carries out multiple cell trace scheduling, it is characterised in that in step 4
In, the continuous D frames value is 6.
5. the method that WCDMA system as claimed in claim 1 carries out multiple cell trace scheduling, it is characterised in that in step 5
In, the continuous C frames value is 50.
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