CN102238660B - Cell reselection method - Google Patents
Cell reselection method Download PDFInfo
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- CN102238660B CN102238660B CN 201010165121 CN201010165121A CN102238660B CN 102238660 B CN102238660 B CN 102238660B CN 201010165121 CN201010165121 CN 201010165121 CN 201010165121 A CN201010165121 A CN 201010165121A CN 102238660 B CN102238660 B CN 102238660B
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Abstract
The invention provides a cell reselection method, which comprises that: one or more virtual neighbor cells are configured in a macro cell, and are configured with a frequency point and scrambling code pair respectively; a femto-cell adjacent to the macro cell sets a frequency point and a scrambling code of the main carrier frequency of the femto-cell to be the same as those of the virtual neighbor cell of the macro cell; when the signal intensity of a main common control physical channel of the femto-cell meets reselection requirements, a user terminal resident in the macro cell performs reselection from the macro cell to the femto-cell; and the user terminal performing the reselection to the femto-cell initiates location area updating to a network side, and the network side selects the frequency point with the lowest interference as a main frequency point of the femto-cell according to the location area updating. By the cell reselection method, the reselection of the user terminal from the outdoor macro cell to the femto-cell can be realized effectively.
Description
Technical field
The present invention relates to the mobile communication technology field, refer in particular to a kind of method of cell reselection.
Background technology
Along with improving constantly and the extensive use of broadband access network and wireless network of the develop rapidly of mobile communication technology, wireless access rate, the mobile service type also expands to present various, colourful appreciation type from initial simple voice and short message service and moves the data industry.Vast user also wishes can be whenever and wherever possible, at a high speed pass through the hand-held wireless device access network, the Internet resources that become increasingly abundant with enjoyment and various high speed, convenient, wireless data service cheaply.Have data to show, indoor environment user is often used the most concentrated place of radio honeycomb business, and for example, in indoor voice service even can account for 70% of whole voice service, business such as visual telephone, Streaming Media, recreation also generally all occur in indoor environment.Therefore, need provide bigger power system capacity and good network quality at indoor environment and application scenarios, to improve user's Experience Degree.Yet, since most of mobile broadband network employed be the wireless signal of high spectrum, loss and space loss are bigger, to the penetration capacity of building masonry wall a little less than, so the outdoor macro base station in the system is often unsatisfactory to indoor coverage rate; And because the voice and packet data concurrent service amount of indoor environment is more, and the macro base station covering power is limited, thereby causes the service quality in the indoor environment also lower.
If directly increase network capacity by building more macro base station, then the buying of the selection of site, base station, equipment, installation, debugging and maintenance all need to expend a large amount of man power and materials, thereby will improve operation cost greatly.In order to address the above problem, introduced a kind of femtocell (Femto-cell) technology in the prior art, in this technology, by use a kind of be arranged at indoor and insert by fixed broadband provide the Femto base station of big broadband mobile data services to realize strengthening the covering of indoor environment as indoor environment, service centered by indoor environment is provided, thereby both shared the pressure of macro base station, and can provide characteristic service at room area and application scenarios again, improved user's Experience Degree.
When using above-mentioned Femto-cell technology in the system, each Femto base station be all corresponding to a Femto residential quarter (generally also can be referred to as " flying the residential quarter " or " Femto cell "), and the user may need to carry out the seamless switching between Femto residential quarter and the outdoor macro cell when being necessary in the system.Generally, switch to outdoor macro cell from the Femto residential quarter and generally do not have what problem, as long as corresponding Neighboring Cell List is set in the Femto residential quarter.But, when needs during from the outdoor macro cell gravity treatment to the Femto residential quarter, because in the concrete network configuration in actual applications, the number of a macrocell Femto residential quarter on every side may be many, for example, tens Femto residential quarters are arranged, and the finite capacity of the Neighboring Cell List in the macrocell, but also the information that needs to store other contiguous macrocell, therefore in the ordinary course of things, macrocell can not all join in the Neighboring Cell List Femto residential quarter that all are contiguous, thereby is difficult to guarantee the switching of user terminal (UE) from outdoor macro cell to the Femto residential quarter.That is to say how to realize the gravity treatment of UE from outdoor macro cell to the Femto residential quarter effectively, is problem demanding prompt solution in this area.
Summary of the invention
The invention provides a kind of method of cell reselection, thereby can realize the gravity treatment of user terminal from outdoor macro cell to the Femto residential quarter effectively.
For achieving the above object, the technical scheme among the present invention is achieved in that
A kind of method of cell reselection, this method comprises:
A, in macrocell the one or more virtual adjacent areas of configuration, and be each virtual adjacent area of disposing all dispose a frequency and scrambler right;
It is identical with frequency and the scrambler of a virtual adjacent area of described macrocell that B, the frequency that fly residential quarter its main carrier frequency adjacent with described macrocell and scrambler are set to;
C, when the described Primary Common Control Physical Channel signal strength signal intensity that flies the residential quarter satisfies requiring of gravity treatment, reside in user terminal in the described macrocell from described macrocell gravity treatment to the described residential quarter that flies;
D, described gravity treatment are initiated location area updating to the user terminal that flies the residential quarter to network side, and network side selects one to disturb minimum frequency to fly the dominant frequency point of residential quarter as this according to above-mentioned location area updating.
Described step B comprises:
When described when flying not to be in the user terminal of connected state in the residential quarter, this flies the residential quarter and select a virtual adjacent area from the virtual adjacent area of described macrocell, and this frequency that flies the residential quarter main carrier frequency is set to consistent with frequency and the scrambler of selected virtual adjacent area with scrambler.
When described macrocell is provided with a plurality of virtual adjacent area, describedly from the virtual adjacent area of described macrocell, select a virtual adjacent area to comprise:
From a plurality of virtual adjacent area of described macrocell, select a virtual adjacent area arbitrarily.
This method also further comprises:
Describedly fly described frequency and scrambler to main carrier frequency carried out in the residential quarter according to the cycle that sets in advance setting.
Described user terminal from described macrocell gravity treatment to described fly the residential quarter before, this method also further comprises: described user terminal carries out the monitoring of signal strength signal intensity to all adjacent areas in the described macrocell.
Described network side selects one to disturb minimum frequency to comprise as the dominant frequency point that this flies the residential quarter according to above-mentioned location area updating:
Network side judges according to described location area updating, when existing in the described coverage that flies the residential quarter when only supporting the user terminal of A frequency range or not having the Any user terminal, then selects one to disturb the frequency of minimum A frequency range to fly the dominant frequency point of residential quarter as this; When this flies all users in the coverage of residential quarter when all supporting A frequency range and F-band, then select one to disturb the frequency of minimum F-band to fly the dominant frequency point of residential quarter as this.
After described step D, this method also further comprises:
Return execution in step C; Perhaps, return execution in step C and step D.
In summary, provide a kind of method of cell reselection among the present invention.In described method of cell reselection, owing to disposed one or more virtual adjacent areas for macrocell in advance, and make the Femto residential quarter around this macrocell have identical frequency and scrambler with some virtual adjacent area in the above-mentioned virtual adjacent area, and then make the UE that resides in the macrocell to select corresponding Femto residential quarter according to signal strength signal intensity, and finally finish gravity treatment from macrocell to the Femto residential quarter, thereby can realize the gravity treatment of user terminal from outdoor macro cell to the Femto residential quarter effectively.
Description of drawings
Fig. 1 is the schematic flow sheet of the method for cell reselection among the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The invention provides a kind of method of cell reselection, in the method, will be in advance for macrocell disposes one or more virtual adjacent areas, and be each virtual adjacent area of disposing all dispose a frequency and scrambler right; And then make the Femto residential quarter around this macrocell have identical frequency and scrambler with some virtual adjacent area in the above-mentioned virtual adjacent area, and then make the UE that resides in the macrocell to select corresponding Femto residential quarter according to signal strength signal intensity, and finally finish gravity treatment from macrocell to the Femto residential quarter, thereby can realize the gravity treatment of user terminal from outdoor macro cell to the Femto residential quarter effectively.
Fig. 1 is the schematic flow sheet of the method for cell reselection among the present invention.As shown in Figure 1, in the method for cell reselection in the present invention, mainly comprise step as described below:
Owing to all the Femto residential quarters around the macrocell all can't be configured to the adjacent area of this macrocell, therefore, in specific embodiments of the invention, no matter this macrocell has what Femto residential quarters, this macrocell all will dispose one or more adjacent areas (above-mentioned pre-configured adjacent area can be referred to as virtual adjacent area) by the mode that sets in advance on every side; Then, this macrocell from the self networks resource, reserve some frequencies and scrambler right, and each the virtual adjacent area that disposes for this macrocell all disposes a corresponding frequency and scrambler is right.In an embodiment of the present invention, can use collocation method commonly used in this area to finish above-mentioned frequency and the right configuration of scrambler, concrete collocation method does not repeat them here.
Wherein, the above-mentioned virtual adjacent area that disposes can only be used in message, thereby makes that for the UE that is in connected state (for example, being in talking state) in this macrocell this virtual adjacent area can't be used by this UE.In addition, in specific embodiments of the invention, can set in advance the number of virtual adjacent area set in the described macrocell as required, concrete method to set up does not repeat them here.
It is identical with frequency and the scrambler of a virtual adjacent area of described macrocell that step 102, the frequency of Femto residential quarter its main carrier frequency adjacent with described macrocell and scrambler are set to.
In this step, each Femto residential quarter adjacent with described macrocell all can set in advance frequency and the scrambler of the main carrier frequency of self, and makes that frequency and the scrambler of the some virtual adjacent areas in set frequency and scrambler and the described macrocell are consistent.For example, in specific embodiments of the invention, for any one Femto residential quarter adjacent with described macrocell, when not being in the user terminal of connected state in this Femto residential quarter, a virtual adjacent area will be selected in this Femto residential quarter from the virtual adjacent area of described macrocell, and the frequency of this Femto residential quarter main carrier frequency is set to consistent with frequency and the scrambler of selected virtual adjacent area with scrambler.
In addition, in an embodiment of the present invention, when described macrocell is provided with a plurality of virtual adjacent area, described Femto residential quarter can be selected a virtual adjacent area arbitrarily from above-mentioned a plurality of virtual adjacent areas, perhaps, also can use other system of selection commonly used (for example, according to virtual adjacent area in system message sequence number or select to use around minimum frequency and the system of selection of scrambler equity of access times in the adjacent area) select virtual adjacent area, the present invention does not limit above-mentioned system of selection.
In addition, in an embodiment of the present invention, described Femto residential quarter can also be carried out the setting of above-mentioned frequency and scrambler to main carrier frequency according to the cycle that sets in advance, and namely this Femto residential quarter will be reset frequency and the scrambler of its main carrier frequency according to the method for above-mentioned steps 102 every the regular hour.Wherein, in specific implementation process, can set in advance the length (for example, 10 seconds) in above-mentioned cycle according to actual needs.
Specifically, in an embodiment of the present invention, the UE that resides in the described macrocell will carry out the monitoring of signal strength signal intensity to all adjacent areas in this macrocell (comprising virtual adjacent area), when the requirement of satisfying gravity treatment with PCCPCH signal strength signal intensity that the virtual adjacent area of described macrocell has some Femto residential quarter of identical frequency and scrambler (for example, reach a certain threshold value that sets in advance) time, this UE can carry out the residential quarter reselection operation, from described macrocell gravity treatment to described Femto residential quarter.Wherein, described residential quarter reselection operation can be carried out according to residence reselecting commonly used in this area, and therefore, concrete operating process does not repeat them here.
Because the LAC of the Location Area Code (LAC) of Femto residential quarter and macrocell is different, therefore in this step, gravity treatment to the UE of Femto residential quarter will be on one's own initiative to network side (for example, RNC) location area updating of initiation.Network side will select one to disturb minimum frequency as the dominant frequency point of described Femto residential quarter according to above-mentioned location area updating.For example, in specific embodiments of the invention, network side will be judged accordingly according to above-mentioned location area updating, only support the A frequency range (during 2010～2025MHz) UE, then to select one to disturb the frequency of minimum A frequency range as the dominant frequency point of this Femto residential quarter when existing in the coverage of this Femto residential quarter; When supporting A frequency range and F-band, all users in the coverage of this Femto residential quarter (1880～1920MHz) time, then select one to disturb the frequency of minimum F-band as the dominant frequency point of this Femto residential quarter.
Preferable, in specific embodiments of the invention, can gravity treatment arrive the most suitable Femto residential quarter in order to guarantee above-mentioned UE, after finishing above-mentioned steps 104, execution in step 103 again; Perhaps, after finishing above-mentioned steps 104, execution in step 103 and 104 again is to guarantee that Femto cell signal strength that the gravity treatment of described UE institute arrives is maximum and disturb minimum.
In summary, above-mentioned method of cell reselection has been proposed in an embodiment of the present invention.In above-mentioned method of cell reselection, owing to disposed one or more virtual adjacent areas for macrocell in advance, and make the Femto residential quarter around this macrocell have identical frequency and scrambler with some virtual adjacent area in the above-mentioned virtual adjacent area, and then make the UE that resides in the macrocell to select corresponding Femto residential quarter according to signal strength signal intensity, and finally finish gravity treatment from macrocell to the Femto residential quarter, thereby can realize the gravity treatment of user terminal from outdoor macro cell to the Femto residential quarter effectively.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (7)
1. a method of cell reselection is characterized in that, this method comprises:
A, in macrocell the one or more virtual adjacent areas of configuration, and be each virtual adjacent area of disposing all dispose a frequency and scrambler right;
It is identical with frequency and the scrambler of a virtual adjacent area of described macrocell that B, the frequency that fly residential quarter its main carrier frequency adjacent with described macrocell and scrambler are set to;
C, when the described Primary Common Control Physical Channel signal strength signal intensity that flies the residential quarter satisfies requiring of gravity treatment, reside in user terminal in the described macrocell from described macrocell gravity treatment to the described residential quarter that flies;
D, described gravity treatment are initiated location area updating to the user terminal that flies the residential quarter to network side, and network side selects one to disturb minimum frequency to fly the dominant frequency point of residential quarter as this according to above-mentioned location area updating.
2. method according to claim 1 is characterized in that, described step B comprises:
When described when flying not to be in the user terminal of connected state in the residential quarter, this flies the residential quarter and select a virtual adjacent area from the virtual adjacent area of described macrocell, and this frequency that flies the residential quarter main carrier frequency is set to consistent with frequency and the scrambler of selected virtual adjacent area with scrambler.
3. method according to claim 2 is characterized in that, when described macrocell is provided with a plurality of virtual adjacent area, describedly selects a virtual adjacent area to comprise from the virtual adjacent area of described macrocell:
From a plurality of virtual adjacent area of described macrocell, select a virtual adjacent area arbitrarily.
4. method according to claim 1 is characterized in that, this method also further comprises:
Describedly fly described frequency and scrambler to main carrier frequency carried out in the residential quarter according to the cycle that sets in advance setting.
5. method according to claim 1 is characterized in that, described user terminal from described macrocell gravity treatment to described fly the residential quarter before, this method also further comprises:
Described user terminal carries out the monitoring of signal strength signal intensity to all adjacent areas in the described macrocell.
6. method according to claim 1 is characterized in that, described network side selects one to disturb minimum frequency to comprise as the dominant frequency point that this flies the residential quarter according to above-mentioned location area updating:
Network side judges according to described location area updating, when existing in the described coverage that flies the residential quarter when only supporting the user terminal of A frequency range or not having the Any user terminal, then selects one to disturb the frequency of minimum A frequency range to fly the dominant frequency point of residential quarter as this; When this flies all users in the coverage of residential quarter when all supporting A frequency range and F-band, then select one to disturb the frequency of minimum F-band to fly the dominant frequency point of residential quarter as this.
7. method according to claim 1 is characterized in that, after described step D, this method also further comprises:
Return execution in step C; Perhaps, return execution in step C and step D.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010165121 CN102238660B (en) | 2010-04-30 | 2010-04-30 | Cell reselection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010165121 CN102238660B (en) | 2010-04-30 | 2010-04-30 | Cell reselection method |
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| CN102238660A CN102238660A (en) | 2011-11-09 |
| CN102238660B true CN102238660B (en) | 2013-08-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102696253B (en) * | 2012-01-20 | 2014-06-04 | 华为技术有限公司 | Measurement method, user device, and eNB for limited network cell |
| WO2015039315A1 (en) * | 2013-09-18 | 2015-03-26 | 华为技术有限公司 | Small station communication method, device and system |
| CN106455006B (en) * | 2015-08-13 | 2019-12-03 | 中国电信股份有限公司 | A kind of method and user terminal for cell selection |
| CN106817703B (en) * | 2016-12-16 | 2019-11-19 | 京信通信系统（中国）有限公司 | A kind of frequency point optimization method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651961A (en) * | 2008-08-11 | 2010-02-17 | 华为技术有限公司 | Method and terminal for reselecting cell |
| CN101668294A (en) * | 2008-09-03 | 2010-03-10 | 大唐移动通信设备有限公司 | Method and system for reducing interferences |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9544833B2 (en) * | 2008-07-11 | 2017-01-10 | Qualcomm Incorporated | Method and apparatus for femto cell deployment using neighbor list messages and its use in femto cell system selection |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651961A (en) * | 2008-08-11 | 2010-02-17 | 华为技术有限公司 | Method and terminal for reselecting cell |
| CN101668294A (en) * | 2008-09-03 | 2010-03-10 | 大唐移动通信设备有限公司 | Method and system for reducing interferences |
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