CN106413040A - Sweeping method for multi-carrier system - Google Patents
Sweeping method for multi-carrier system Download PDFInfo
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- CN106413040A CN106413040A CN201510463345.5A CN201510463345A CN106413040A CN 106413040 A CN106413040 A CN 106413040A CN 201510463345 A CN201510463345 A CN 201510463345A CN 106413040 A CN106413040 A CN 106413040A
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- Prior art keywords
- frequency
- merger
- base station
- carrier
- frequency point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Abstract
The invention provides a sweeping method for a multi-carrier system. The method comprises the following steps: dividing all adjacent base stations into N groups, performing frequency point merging on each adjacent base station group: a, using all the adjacent base stations of the group as a to-be-merged set; b, finding out an operating carrier with the highest utilization rate from operating carriers used by the to-be-merged set, and all adjacent base stations using the operating carrier with the highest utilization rate in the to-be-merged set, merging the operating carriers used by all the adjacent base stations to obtain a merged frequency point combination, and then using all adjacent base stations that do not use the operating carrier with the highest utilization rate in the to-be-merged set as a new to-be-merged set; c, repeating the step b until there is no new to-be-merged set; sweeping all the acquired merged frequency point combinations after the frequency points of all adjacent base station groups are merged. The method, on the premise that each adjacent base station can be swept, reduces the sweep times to the utmost extent and effectively shortens the sweeping time interval of each base station.
Description
Technical field
The present invention relates to wireless communication field, the method that in more particularly, to a kind of multicarrier system, frequency sweep optimizes.
Background technology
Carrier aggregation (CA, Carrier Aggregation) technology, will multiple companies under same base station
Continuous or discontinuous carrier aggregation together, provides service for terminal unit.These continuous or discrete loads
Ripple is referred to as member carrier (CC, Component Carrier).Member carrier can be divided into main carrier to carry with secondary
Two kinds of ripple.In general, main carrier is used for exchanging between terminal and base station and controls and business information；Subcarrier
It is mainly used in service interaction.One terminal must have a main carrier, can have multiple subcarriers it is also possible to
There is no subcarrier.
Terminal, in moving process, in order to maintain preferable communication quality, needs according to network device management system
The configuration parameter issuing of uniting carries out periodic sweep, when frequency sweep result meets the switching condition of parameter configuration,
The switching to target BS is initiated in request.In multi-carrier systems, the configuration of each base station is continuous or discrete
Member carrier, the carrier number being configured is likely to can be different, and mobile terminal may be operated in the master of serving BS
On carrier wave or certain subcarrier.Conventional frequency sweeping method is at present：Terminal receives under network apparatus management system
Send out adjoining base station carrier wave configuration and sweep parameters, according to the specific time cycle interval and frequency sweep order by
Individual carry out frequency sweep.But if when the adjoining base station that configured of current base station is more, or each adjoining base station is joined
When the continuous or discrete member carrier position put is larger with number difference, each configuring is adjoined by terminal
Frequency carrier position scanning will need to expend more times for one time, terminal from scan determine to target BS
The time initiating handover request can be longer, when source base station signal is not enough to maintain proper communication so long
When, the interruption of communication service can be caused, bring bad impression and experience to user.
Content of the invention
Effect and the efficiency of frequency sweep can be had a strong impact in multi-carrier systems using the method for background technology, and then
The handoff functionality of impact terminal, in order to solve this problem, the present invention proposes a kind of sweeping of new multicarrier system
Frequency method, the method includes：
All of its neighbor base station is divided into N group, N is positive integer, carries out following frequency to each adjoining base station group
Point merger is processed：
A, all of its neighbor base station that this is organized is as treating merger set；
B, from treating to find highest utilization rate operating carriers the operating carriers that merger set uses, finds out and waits to return
And all adjoining base stations using described highest utilization rate operating carriers in gathering, collect these adjoining base station institutes
There are the operating carriers being used in conjunction with to obtain the combination of merger frequency, then will treat all in merger set not make
Treat merger set with the adjoining base station of described highest utilization rate operating carriers as new；
C, repeat step b new treats merger set until not existing；
After the completion of the frequency merger of all of its neighbor group of base stations is processed, all merger frequency combinations that scanning obtains.
Preferably, all of its neighbor base station can be grouped according to mid frequency, has same centre frequency
Adjoining base station is divided into same group.
Preferably, in above-mentioned steps b, process can also be optimized to the combination of described merger frequency, choose
Retain wherein partial carrier wave frequency, delete remaining carrier frequency point, so can reach minimizing frequency sweep frequency as far as possible
The purpose of number.Further, described merger frequency combination is only chosen and is retained a carrier frequency point, selects certain
The strategy of individual carrier frequency point can be：Order selection mode, random selection mode, the selection based on main carrier
Mode, the selection mode based on operating carriers, and the mixing selection mode of this four kinds of selection modes etc..
Order selection mode refers to there are multiple continuous or discrete carrier frequency points in merger frequency combines
When, choose the wherein minimum or maximum carrier frequency point of reservation according to frequency size order and be scanned.
Random selection mode refers to there are multiple continuous or discrete carrier frequency points in merger frequency combines
When, randomly select reservation certain carrier frequency point therein and be scanned.
Referred to multiple continuous or discrete when existing in the combination of merger frequency based on the selection mode of main carrier
During carrier frequency point, if wherein existing and Current Serving BTS main carrier identical frequency, choosing and retaining this
Carrier frequency point is scanned.
Based on the selection mode of operating carriers refer to when merger frequency combine in exist multiple continuously or discontinuously
Carrier frequency point when, if wherein existing and the carrier wave identical frequency of terminal work at present, choosing and retaining
This carrier frequency point is scanned, it is to avoid the Current Serving BTS swept alien frequencies and lead to because continually changing frequency is synchronously lost
Situation about losing.
Mixing selection mode refers to selection mode and order/random selection mode based on main carrier/operating carriers
Certain selection mode combining.In merger frequency combines, there are multiple continuous or discrete carrier frequencies
During point, if wherein there is the carrier wave identical frequency with Current Serving BTS main carrier or terminal work at present
Point, then choose carrier frequency point using the selection mode based on main carrier or operating carriers；If wherein do not existed
With the carrier wave identical frequency of Current Serving BTS main carrier or terminal work at present, then adopt order or random
Selection mode choose carrier frequency point.
In the present invention, when mobile terminal is scanned to the multicarrier frequency of multiple adjoining base stations, to all neighbours
The operating carriers connecing base station carry out merger process, only the frequency after merger are scanned, the advantage of the method
It is：On the premise of mobile terminal can be able to be swept to ensureing each adjoining base station, reduce frequency sweep as far as possible
Number of times, such that it is able to effective frequency sweep time interval shortening each base station, comparatively fast completes to adjacent carrier frequency point
Frequency sweep process, so switch and steady operation on the more excellent target BS of communication quality it is ensured that communication service
It is not disrupted, to user with good impression and experience.Mobile terminal can also be to the carrier frequency point after merger
Do further preferably, a certain carrier frequency point chosen in the combination of the frequency after merger is scanned, so each
Only one operating carriers of adjoining base station are scanned, and can further reduce sweep, improve frequency sweep effect
Rate.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
Example or description of the prior art in required use accompanying drawing be briefly described it should be apparent that, retouch below
Accompanying drawing in stating is some embodiments of the present invention, for those of ordinary skill in the art, is not paying
On the premise of creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is BTScurAnd BTS1～BTS6Member carrier and operating carriers position view.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the present invention
Accompanying drawing in embodiment, 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；It should be noted that
In the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of not making creative work
Every other embodiment, broadly fall into the scope of protection of the invention.
2 following embodiments are the exemplary embodiments of the present invention, and all embodiments all assume current service base
Stand BTScurThere is BTS1～BTS6Totally 6 adjoining base stations, each base station configures 5 member carriers, often
The a width of 1MHz of band of individual member carrier.Only have certain several continuous in the carrier wave set of each base station configuration or do not connect
Continuous member carrier can work, and indicates that with ScgMask array the work in certain base station carrier group carries
Ripple, ScgMask array element and member carrier are corresponding in turn to, and are to represent when 1 that corresponding member carrier is work
Make carrier wave, be when 0, to represent that corresponding member carrier is non-operating carriers.BTScurAnd BTS1～BTS6Configuration
Member carrier and operating carriers position as shown in figure 1, configuration be specially：
BTScur, center frequency point FreqcurFor 1795MHz, 5 member carriers are 1793MHz, 1794MHz,
1795MHz, 1796MHz, 1797MHz, corresponding ScgMaskcurFor [1 110 0]；
BTS1, center frequency point Freq1For 1793MHz, 5 member carriers are 1791MHz, 1792MHz,
1793MHz, 1794MHz, 1795MHz, corresponding ScgMask1For [0 110 0]；
BTS2, center frequency point Freq2For 1793MHz, 5 member carriers are 1791MHz, 1792MHz,
1793MHz, 1794MHz, 1795MHz, corresponding ScgMask2For [1 111 1]；
BTS3, center frequency point Freq3For 1795MHz, 5 member carriers are 1793MHz, 1794MHz,
1795MHz, 1796MHz, 1797MHz, corresponding ScgMask3For [0 011 1]；
BTS4, center frequency point Freq4For 1795MHz, 5 member carriers are 1793MHz, 1794MHz,
1795MHz, 1796MHz, 1797MHz, corresponding ScgMask4For [0 110 0]；
BTS5, center frequency point Freq5For 1795MHz, 5 member carriers are 1793MHz, 1794MHz,
1795MHz, 1796MHz, 1797MHz, corresponding ScgMask5For [0 011 0]；
BTS6, center frequency point Freq6For 1798MHz, 5 member carriers are 1796MHz, 1797MHz,
1798MHz, 1799MHz, 1800MHz, corresponding ScgMask6For [0 010 1].
Embodiment 1
The present embodiment using all of its neighbor base station as group (it also will be understood that paired all of its neighbor base station is not held
Row packet), concrete frequency sweep operation step is as follows：
Step 1：From treating to find out the adjoining base station of all use highest utilization rate operating carriers merger set,
Collect all operating carriers being used in conjunction with of these adjoining base stations and obtain the 1st merger frequency combination.
BTScurAnd BTS1～BTS6The member carrier being configured cover altogether 1791MHz,
1792MHz ..., 1800MHz totally 10 frequencies, in order to corresponding with this 10 frequencies, by ScgMaskcur
Expand to [0 01110000 0], by ScgMask1Expand to [0 11000000 0], by ScgMask2
Expand to [1 11110000 0], by ScgMask3Expand to [0 00011100 0], by ScgMask4
Expand to [0 00110000 0], by ScgMask5Expand to [0 00011000 0], by ScgMask6
Expand to [0 00000010 1].
To adjoining base station BTS1～BTS6ScgMask execution step-by-step summation operation, obtain the knot after computing
Fruit ScgMaskSum1=[1 22242110 1].ScgMaskSum1Middle maximum (represents corresponding for 4
1795MHz has 4 base stations and uses, and is highest utilization rate operating carriers), its corresponding index value IndMAX1
For 4 (starting to calculate from 0 from left to right), construct DeleteMask1=[0 00010000 0].With
ScgMask1～ScgMask6With DeleteMask1Execution step-by-step and computing respectively, will operation result be wherein
The base station BTS of non-zero value2～BTS5It is classified as one group (to find out using highest utilization rate operating carriers 1795MHz
All of its neighbor base station), by the corresponding ScgMask in base station in this group2～ScgMask5Execution step-by-step and computing,
Obtain ScgMaskScan1=[0 00010000 0], the corresponding frequency of wherein 1 value is
ScgMask2～ScgMask5The operating carriers being used in conjunction with, then obtain the 1st merger frequency herein and be combined as
{1795MHz}.
Step 2：All neighbours not using highest utilization rate operating carriers 1795MHz in merger set will be treated
Connect base station and treat merger set, the operation of repeat step 1 as new, obtain the 2nd merger frequency combination.
By ScgMask1～ScgMask6With DeleteMask1The result of execution step-by-step and computing is the base of 0 value
Stand BTS1With BTS6Treat merger set as new, to BTS1And BTS6ScgMask execution new one
The step-by-step summation operation of wheel, draws result ScgMask after computingSum2=[0 11000010 1].
ScgMaskSum2Middle maximum is 1, chooses one of index value for 1, the Ind of such as selectionMAX2
For 2 (representing 1793MHz as highest utilization rate operating carriers), construction DeleteMask2=[0 010
0 0 0 0 0 0].Use ScgMask1、ScgMask6With DeleteMask2Execution step-by-step and computing respectively, its
Middle operation result is that the base station of non-zero value only has BTS1, then according to ScgMask1Obtain ScgMaskScan2=[0
11000000 0], then obtain the 2nd merger frequency and be combined as { 1792MHz, 1793MHz }.
Step 3：By step 2 treat all in merger set do not use highest utilization rate operating carriers
The adjoining base station of 1793MHz treats merger set, the operation of repeat step 1 as new, obtains the 3rd
Merger frequency combines.
ScgMask1、ScgMask6With DeleteMask2The result of execution step-by-step and computing is the base station of 0 value
Only BTS6, then BTS6Treat merger set as new, then according to ScgMask6Obtain ScgMaskSum3,
Again according to ScgMaskSum3Obtain ScgMaskScan3=[0 00000010 1], obtain the 3rd merger frequency
Point is combined as { 1798MHz, 1800MHz }.The now operating carriers of all of its neighbor base station all merger, no
Exist new treat merger set, frequency merger processes and leaves it at that.
Step 4：After the completion of frequency merger is processed, 3 merger frequency combinations are obtained, obtain after conclusion
Whole frequency sweep collection is combined into { 1792MHz, 1793MHz, 1795MHz, 1798MHz, 1800MHz }, so
In the sweep parameters issuing according to network apparatus management system afterwards, the time cycle of configuration is spaced to frequency sweep set
In carrier frequency point execute frequency sweep operation one by one.
Embodiment 2
The present embodiment with the mid frequency of adjoining base station as foundation, using the carrier frequency to each adjoining base station for the packet
Point does merger and processes, and to the carrier frequency point in the merger frequency combination obtaining using the choosing based on operating carriers
The mixing selection mode that mode of selecting is combined with order selection mode carries out further optimization processing.This is implemented
The operating procedure of example is as follows：
Step 1：According to the mid frequency of base station, by BTS1～BTS6It is divided into 3 groups：Wherein the 1st group
FREQ1Comprise BTS1With BTS2, the 2nd group of FREQ2Comprise BTS3～BTS5, the 3rd group of FREQ3Bag
Containing BTS6.
Step 2：Take FREQ1In BTS1With BTS2, calculate ScgMaskSum1=[1 221 1], maximum
It is worth for 2, choose one of index value for 2, the Ind of such as selectionMAX1For 1, construct
DeleteMask1=[0 100 0].Use ScgMask1、ScgMask2With DeleteMask1Execute step-by-step respectively
With computing, all obtain non-zero value, then by ScgMask1With ScgMask2Execution step-by-step and computing, obtain
ScgMaskScan1=[0 110 0], correspondence obtains merger frequency and is combined as { 1792MHz, 1793MHz }.
Step 3：Selected using the mixing that the selection mode based on operating carriers is combined with order selection mode
Mode enters traveling one to two scanning frequencies in merger frequency combination { 1792MHz, 1793MHz } obtaining
Step selects：The current operating carriers of terminal may be 1793MHz, 1794MHz or 1795MHz, if
Terminal work at present carrier wave is 1793MHz, then select to retain 1793MHz as scanning frequency, if eventually
End work at present carrier wave is 1794MHz or 1795MHz, then selection mode selects to retain in order
1792MHz is as scanning frequency.
Step 4：Take FREQ2In BTS3～BTS5, by above-mentioned same in the way of calculate
ScgMaskScan2=[0 010 0], correspondence obtains merger frequency and is combined as { 1795MHz }.
Step 5：Take FREQ3In BTS6, by above-mentioned same in the way of calculate ScgMaskScan3=[0 0
10 1], correspondence obtains merger frequency and is combined as { 1798MHz, 1800MHz }.Using based on operating carriers
Selection mode combine with order selection mode mixing selection mode to the 1798MHz obtaining with
Two scanning frequencies of 1800MHz are selected further：Due to the current operating carriers of terminal and this two
Scanning frequency does not have overlap, so selection mode selects to retain 1798MHz as scanning frequency in order.
Step 6：Conclude final frequency sweep collection be combined into 1792MHz or 1793MHz, 1795MHz,
1798MHz}.
One of ordinary skill in the art will appreciate that：The all or part of step realizing said method embodiment can
Completed with the hardware related by programmed instruction, aforesaid program can be stored in an embodied on computer readable and deposit
In storage media, this program upon execution, executes the step including said method embodiment；And aforesaid storage
Medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.
Finally it should be noted that：Above example is only in order to illustrating technical scheme, rather than it is limited
System；Although being described in detail to the present invention with reference to the foregoing embodiments, those of ordinary skill in the art
It should be understood that：It still can be modified to the technical scheme described in foregoing embodiments, or to it
Middle some technical characteristics carry out equivalent；And these modifications or replacement, do not make appropriate technical solution
Essence departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a kind of frequency sweeping method of multicarrier system, methods described includes：
All of its neighbor base station is divided into N group, N is positive integer, carries out following frequency to each adjoining base station group
Point merger is processed：
A, all of its neighbor base station that this is organized is as treating merger set；
B, from treating to find highest utilization rate operating carriers the operating carriers that merger set uses, finds out and waits to return
And all adjoining base stations using described highest utilization rate operating carriers in gathering, collect these adjoining base station institutes
There are the operating carriers being used in conjunction with to obtain the combination of merger frequency, then will treat all in merger set not make
Treat merger set with the adjoining base station of described highest utilization rate operating carriers as new；
C, repeat step b new treats merger set until not existing；
After the completion of the frequency merger of all of its neighbor group of base stations is processed, all merger frequency combinations that scanning obtains.
2. method according to claim 1 it is characterised in that：
All of its neighbor base station is grouped according to mid frequency, and the adjoining base station with same centre frequency is divided
For same group.
3. method according to claim 1 and 2 it is characterised in that：
In described step b, further, member-retaining portion carrier frequency point is chosen in described merger frequency combination, deletes
Except remaining carrier frequency point.
4. method according to claim 2 it is characterised in that：
Described merger frequency combination is only chosen and is retained a carrier frequency point.
5. method according to claim 4 it is characterised in that：
Choose according to frequency size order and retain minimum or maximum carrier frequency point in described merger frequency combination.
6. method according to claim 4 it is characterised in that：
Randomly select certain carrier frequency point retaining in described merger frequency combination.
7. method according to claim 4 it is characterised in that：
If existed and Current Serving BTS main carrier identical frequency in described merger frequency combination, choose
Retain this carrier frequency point.
8. method according to claim 4 it is characterised in that：
If existing and terminal work at present carrier wave identical frequency in described merger frequency combination, choosing and protecting
Stay this carrier frequency point.
9. method according to claim 4 it is characterised in that：
If existing identical with Current Serving BTS main carrier in described merger frequency combination or working as with terminal
Front operating carriers identical frequency, then choose and retain this carrier frequency point；Otherwise, select according to frequency size order
Go bail for and stay in the combination of described merger frequency minimum or maximum carrier frequency point or randomly select to return described in reservation
And certain carrier frequency point in frequency combination.
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| CN201510463345.5A CN106413040B (en) | 2015-07-31 | 2015-07-31 | A kind of frequency sweeping method of multicarrier system |
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| CN201510463345.5A CN106413040B (en) | 2015-07-31 | 2015-07-31 | A kind of frequency sweeping method of multicarrier system |
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