CN103763756A - Femtocell quick starting method - Google Patents
Femtocell quick starting method Download PDFInfo
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- CN103763756A CN103763756A CN201410004047.5A CN201410004047A CN103763756A CN 103763756 A CN103763756 A CN 103763756A CN 201410004047 A CN201410004047 A CN 201410004047A CN 103763756 A CN103763756 A CN 103763756A
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Abstract
The invention discloses a Femtocell quick starting method. The Femtocell quick starting method comprises the steps of reading the last macro station scanning information in local storage, decoding and acquiring the information of three macrocells with strongest signals, scanning the three macrocells with the strongest signals around a Femtocell, judging whether the access environment of the Femtocell is changed in a fuzzy mode, conducting complete scanning if the access environment is changed, otherwise conducting quick frequency sweeping, conducting BCH decoding on the macro station scanning information in the local storage to acquire cell information, choosing temporary best frequency interference for the Femtocell according to the acquired information of all the cells, conducting cell scanning on the temporary best frequency interference, allocating the best frequency interference to the Femtocell when the best frequency interference is not occupied or is occupied while the signal strength is weak, and otherwise choosing temporary best frequency interference again. According to the Femtocell quick starting method, detecting and configuration time consuming is shortened to the greatest extent when the Femtocell is started, and a user can quickly enter in a normal using state conveniently.
Description
Technical field
The present invention relates to Femtocell(and fly honeycomb) technical field, relate in particular to a kind of Femtocell quick start method.
Background technology
Femto Home eNodeB is a kind of emerging hot spot technology, is thought one of means that solve indoor covering by industry, is also the fixing a kind of mode merging with mobile network.Femto transmitting power of equipment is little, volume is little, works in mandate frequency range, and covering radius is generally 5-50 rice, and speech and high-speed data service can be provided, and generally supports 4-6 user to use simultaneously.
The advantage of Femto technology is to utilize fixed network resource, absorbs 3G business, alleviates the service traffics pressure of the grand network of 3G; Can also make up the deficiency of the network coverage, improve the quality of indoor covering and user's business experience, strengthen user's viscosity.After large-scale application, the popularization cost of Femto and the operation cost of voice-and-data business can be reduced, and become operator and win user's sharp weapon.
As a kind of emerging technology, the reliable and stable commercial level that reaches still to have various problems.Wherein avoiding co-channel interference is a wherein more crucial problem, and co-channel interference just refers to that the carrier frequency of interference signal is identical with the carrier frequency of useful signal, thereby to receiving the interference with the receiver of useful signal causes frequently.At Time Division-Synchronous Code Division Multiple Access access (Time Division-Synchronous Code Division Multiple Access, being called for short TD-SCDMA) in system, owing to being time-division system, and the spreading code adopting is shorter, spreading gain is less, so co-channel interference harm is larger.
Home eNodeB (FemtoCell) is a self-configuring self-optimizing system, and what self-configuring wherein referred to is exactly that FemtoCell can scan according to it parameters such as the automatic configuration effort frequency of the environmental aspect obtaining, scrambler, transmitting power, gravity treatment handoff threshold, neighbor list at terminal pattern.It is different from macro station that the frequency of Femtocell is disturbed configuration, and it is dynamic-configuration, in order to realize gravity treatment and the switching between Femtocell and macro station community, requires Femtocell and macro station adjacent cell each other.FemtoCell just must carry out dynamic detection and configuration for actual environment when opening, and selects to be operated on best frequency and scrambler.And this section of detection and configuration consuming time occupied very large proportion in the whole device start time, affected user's experience property.
Summary of the invention
The technical problem solving: for the deficiencies in the prior art, the present invention proposes a kind of Femtocell quick start method, the detection while farthest shortening Femtocell startup is consuming time with configuration, facilitates user to enter fast normal operating condition.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of Femtocell quick start method, comprises the steps:
(1) read the local last macro station scanning information of preserving, and three macro cell messages that signal is the strongest are obtained in decoding;
(2) three the strongest macrocells of Femtocell ambient signals are scanned, whether fuzzy judgement FemtoCell access environment changes, if access environment change, FemtoCell normally starts, and carries out complete scan; Otherwise beginning rapid frequency-sweeping, jumps into step (3);
(3) the last macro station scanning information of this locality being preserved carries out BCH decoding, obtains frequency, scrambler, community ID, signal strength signal intensity, the adjacent cell configuration of all communities;
(4) all cell informations that obtain according to step (3) are that FemtoCell selects interim best frequently disturbing;
(5) under terminal pattern, described interim best frequently disturbing carried out to little domain scanning, but when this is interim best frequently disturb there is no occupied or occupied signal strength signal intensity a little less than time set it as and bestly frequently disturb configuration to Femtocell, otherwise this interim best frequency is disturbed to eliminating, return to step (4) and again select interim best frequently disturbing.
Further, when the outer net IP that starts shooting first, accesses as FemtoCell changes and morning, health was restarted, FemtoCell normally starts, and carries out complete whole channel primary scanning in these three kinds of situations of default setting, and not belonging to these three kinds of situations is to start to carry out from step (1).
Further, in step (5), when interim best while frequently disturbing occupied but cell signal strength lower than-90dbm, set it as and bestly frequently disturb configuration to Femtocell.
Beneficial effect: the macro station information that (1) Femtocell quick start method provided by the invention is preserved during based on complete frequency sweep, carry out on its basis quick frequency-selecting, effectively saved the available machine time, detection while farthest shortening Femtocell startup is consuming time with configuration, facilitates user to enter fast normal operating condition; (2) Sniffer module, Decode module and the frequency-selecting block configuration Femto start-up parameter of Femtocell quick start method provided by the invention based in existing Femtocell system, convenience and high-efficiency; (3) the present invention sets up three kinds of normal startup situations, and when starting fast for fear of the variation that may exist, checking interim optimum optimality of frequently disturbing in frequency-selecting flow process fast, guarantee the accuracy of the quick frequency-selecting of Femtocell.
Accompanying drawing explanation
Fig. 1 is that the frequency of determining that the present invention adopts is determined flow-disturbing journey.
Fig. 2 is that the same frequency that adopts of the present invention is with flow-disturbing journey.
Fig. 3 is Femtocell quick start method flow chart provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Femtocell is a self-configuring self-optimizing system, what self-configuring wherein referred to is exactly that FemtoCell can scan the automatic configuration effort frequency of the environmental aspect obtaining at terminal pattern according to it, scrambler, transmitting power, gravity treatment handoff threshold, the parameters such as neighbor list, it is different from macro station that the frequency of Femtocell is disturbed configuration, it is dynamic-configuration, in order to realize gravity treatment and the switching between Femtocell and macro station community, requires it and macro station adjacent cell each other.
Existing actual usage data shows, a complete full frequency band frequency sweep wait that has exceeded client consuming time.Take Suzhou of starting at present commercial Femtocell as example, A frequency range band limits: 2010MHZ～2025MHZ, frequency range: 1.2/1.4MHZ, 10 grand net frequencies are: 10060,10066 (only dividing for chamber), 10072,10079,10086,10093,10100,10107,10114,10121 (only dividing for chamber).1 Femto frequency is: 10054.F-band band limits: 1890MHZ～1900MHZ, 1905MHZ～1910MHZ.Frequency range: 1.4MHZ.9 grand net frequencies are: 9460,9467,9474,9481,9488,9495,9532,9539,9546.2 Femto frequencies are 9581,9595. according to above-mentioned whole 22 frequencies, to need scanning, add system start-up time and protocol stack initialization hour of log-on, and actual test has exceeded 2 minutes.
In fact, be not that each Femtocell start all needs step-by-step frequency point scanning in turn to go over, to disturb be substantially all relatively changeless to the frequency of macro station after all, what change a little is exactly the power of signal, near also having, may there are other Femtocell, and the frequency that the most important is exactly Femtocell selection is disturbed with macro station closely bound up, logically, when macro station does not change, after Femtocell start, frequency-selecting does not just have too large variation yet, certainly, for fear of the variation that may exist, in quick frequency-selecting flow process, also to check the optimality of frequently disturbing.
The frequency-selecting of Femtocell not only needs to consider to avoid co-channel interference, also need to consider gravity treatment and the switching of UE between macro station and Femtocell, this just needs femtocell and macro station adjacent cell each other, and the explanation in agreement is exactly adjacent area each other in the adjacent cell list of system broadcast message SIB11.The adjacent area of Femtocell is very simple, as long as all cell configuration that frequency sweep is obtained have been adjacent area, but how to make the frequency of Femtocell disturb an adjacent area that becomes macro station? the configuration that current existing frequency is disturbed adopts two schemes: fixed frequency is surely disturbed and be same frequently with disturbing.
As shown in Figure 1, fixed frequently surely disturbing refers to macro station and again its neighbor cell configuration gone out to several groups and for the reserved frequency of Femto, disturb group specially, when Femto by frequency sweep and resolve obtain these several groups frequently disturb after, just can use one group of frequency of the work as oneself of their optimums to disturb (only effective in Suzhou at present).
As shown in Figure 2, with frequently referring in the case of not finding that above-mentioned frequency disturbs group with disturbing, from the pond, shared adjacent area of the strongest 3 macro stations around, select one group of the most weak work as Femto of frequently disturbing of signal frequently to disturb.
From two kinds of allocation plans above, can find, the in the situation that of known macro station information around, can be very fast be femtocell configuration effort frequency point scrambling code, the quick frequency-selecting method that the present invention proposes is exactly that the macro station information of preserving during based on complete frequency sweep obtains an interim best effort and frequently disturbs, why be called interim best frequently disturbing? because we mention above, the variation of surrounding environment judges that by the determination module of rapid frequency-sweeping be not 100% accurately, such as a new Femtocell started after complete frequency sweep in last time and occupied this best frequency, this is not that rapid frequency-sweeping institute is foresighted, so we also must carry out frequency sweep to this interim best frequently disturbing, but only have to disturb just to set it as when not having occupied or occupied signal strength signal intensity very weak when this frequency of current scanning discovery and bestly frequently disturb configuration to Femtocell, otherwise this is frequently disturbed and by way of exception again resolves macro station information and continue to look for another interim best frequently disturbing.
Based on the above, as shown in Figure 3, a kind of Femtocell quick start method provided by the invention, comprises the steps:
(1) the Decode module of Femtocell reads the last local macro station scanning information of preserving, and obtains three frequencies the strongest that complete scan is found, decoding obtains three the strongest macrocell details;
(2) Mode select module around scans the strongest San Ge community Femtocell, and whether fuzzy judgement FemtoCell access environment changes, and whether determines rapid frequency-sweeping or complete frequency sweep.If access environment change, starts complete frequency sweep (normally starting), otherwise start rapid frequency-sweeping, jump into step (3);
(3) the macro station scanning information that Decode module is preserved this locality carries out BCH decoding, obtains the frequency of all TD community, scrambler, community ID, signal strength signal intensity, the information such as adjacent cell configuration.
(4) frequency-selecting module according to decode module parses to all cell informations be that FemtoCell selects interim best frequently disturbing;
(5) Sniffer module is carried out little domain scanning to interim best frequently disturbing under terminal pattern, but when this is interim best, frequently disturbs to set it as when not having occupied or occupied signal strength signal intensity very weak and bestly frequently disturb configuration to Femtocell, otherwise return to step (3), again select interim best frequently disturbing.
In the following three kinds of situations of default setting of the present invention, carry out complete whole channel primary scanning, start first, the outer net IP of access changes, and morning, health was restarted.During the complete frequency sweep of Femtocell, pass through Sniffer module, Decode module and frequency-selecting block configuration Femto start-up parameter
(1) Sniffer module: be responsible for, under terminal pattern, the each frequency of full frequency band is carried out to little domain scanning, and preserve frequency sweep result and broadcast data to local.
(2) Decode module: be responsible for the frequency sweep result of sniffer module output to carry out BCH decoding, obtain the frequency of the frequency XiaTD community of scanning, scrambler, community ID, signal strength signal intensity, the information such as adjacent cell configuration.
(3) frequency-selecting module: according to decode module parses to all cell informations be that FemtoCell selects best frequency and scrambler.
The quick frequency-selecting method of Femtcell completing according to above method exists under the environment of macro station community, 9 left and right around, carried out contrast test with complete frequency sweep start, when realizing accurately the best configuration of frequently disturbing, reduce the available machine time of nearly 40s, greatly improved the availability of product.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a Femtocell quick start method, is characterized in that comprising the steps:
(1) read local last macro station complete scan information of preserving, and three macro cell messages that signal is the strongest are obtained in decoding;
(2) three the strongest macrocells of Femtocell ambient signals are scanned, whether fuzzy judgement FemtoCell access environment changes, if access environment change, FemtoCell normally starts, otherwise starts rapid frequency-sweeping, jumps into step (3);
(3) the last macro station scanning information of this locality being preserved carries out BCH decoding, obtains frequency, scrambler, community ID, signal strength signal intensity, the adjacent cell configuration of all communities;
(4) all cell informations that obtain according to step (3) are that FemtoCell selects interim best frequently disturbing;
(5) under terminal pattern, described interim best frequently disturbing carried out to little domain scanning, but when this is interim best frequently disturb there is no occupied or occupied signal strength signal intensity a little less than time set it as and bestly frequently disturb configuration to Femtocell, otherwise this interim best frequency is disturbed to eliminating, return to step (4) and again select interim best frequently disturbing.
2. a kind of Femtocell quick start method according to claim 1, is characterized in that: when the outer net IP that starts shooting first, accesses as FemtoCell changes and morning, health was restarted, FemtoCell normally starts, otherwise execution step (1).
3. a kind of Femtocell quick start method according to claim 1, is characterized in that: in described step (5), when interim best while frequently disturbing occupied but cell signal strength lower than-90dbm, set it as and bestly frequently disturb configuration to Femtocell.
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| CN111787568A (en) * | 2020-07-09 | 2020-10-16 | 恒安嘉新（北京）科技股份公司 | Wireless parameter determination method, device, equipment and storage medium for small base station |
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